3822 lines
111 KiB
C++
3822 lines
111 KiB
C++
// File: crn_decomp.h - Fast CRN->DXTc texture transcoder header file library
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// Copyright (c) 2010-2016 Richard Geldreich, Jr. and Binomial LLC
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// See Copyright Notice and license at the end of this file.
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//
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// This single header file contains *all* of the code necessary to unpack .CRN files to raw DXTn bits.
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// It does NOT depend on the crn compression library.
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//
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// Note: This is a single file, stand-alone C++ library which is controlled by the use of the following macro:
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// If CRND_INCLUDE_CRND_H is NOT defined, the header is included.
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//
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// Important: If compiling with gcc, be sure strict aliasing is disabled: -fno-strict-aliasing
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#ifndef CRND_INCLUDE_CRND_H
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#define CRND_INCLUDE_CRND_H
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// Include crn_defs.h (only to bring in some basic CRN-related types and structures).
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#include "crn_defs.h"
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef _WIN32
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#include <memory.h>
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#else
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#include <malloc.h>
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#endif
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#include <stdarg.h>
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#include <new> // needed for placement new, _msize, _expand
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#define CRND_RESTRICT __restrict
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#ifdef _MSC_VER
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#pragma warning(disable : 4127) // warning C4127: conditional expression is constant
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#endif
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#ifdef CRND_DEVEL
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x500
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#endif
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#ifndef
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#define NOMINMAX
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#endif
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#include "windows.h" // only for IsDebuggerPresent(), DebugBreak(), and OutputDebugStringA()
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#endif
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// File: crnd_types.h
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namespace unitycrnd {
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const crn_uint8 cUINT8_MIN = 0;
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const crn_uint8 cUINT8_MAX = 0xFFU;
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const uint16 cUINT16_MIN = 0;
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const uint16 cUINT16_MAX = 0xFFFFU;
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const uint32 cUINT32_MIN = 0;
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const uint32 cUINT32_MAX = 0xFFFFFFFFU;
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const int8 cINT8_MIN = -128;
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const int8 cINT8_MAX = 127;
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const int16 cINT16_MIN = -32768;
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const int16 cINT16_MAX = 32767;
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const int32 cINT32_MIN = (-2147483647 - 1);
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const int32 cINT32_MAX = 2147483647;
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enum eClear { cClear };
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const uint32 cIntBits = 32U;
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template <typename T>
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struct int_traits {
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enum { cMin = unitycrnd::cINT32_MIN,
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cMax = unitycrnd::cINT32_MAX,
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cSigned = true };
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};
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template <>
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struct int_traits<int8> {
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enum { cMin = unitycrnd::cINT8_MIN,
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cMax = unitycrnd::cINT8_MAX,
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cSigned = true };
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};
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template <>
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struct int_traits<int16> {
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enum { cMin = unitycrnd::cINT16_MIN,
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cMax = unitycrnd::cINT16_MAX,
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cSigned = true };
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};
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template <>
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struct int_traits<int32> {
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enum { cMin = unitycrnd::cINT32_MIN,
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cMax = unitycrnd::cINT32_MAX,
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cSigned = true };
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};
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template <>
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struct int_traits<uint8> {
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enum { cMin = 0,
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cMax = unitycrnd::cUINT8_MAX,
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cSigned = false };
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};
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template <>
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struct int_traits<uint16> {
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enum { cMin = 0,
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cMax = unitycrnd::cUINT16_MAX,
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cSigned = false };
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};
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template <>
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struct int_traits<uint32> {
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enum { cMin = 0,
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cMax = unitycrnd::cUINT32_MAX,
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cSigned = false };
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};
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struct empty_type {};
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} // namespace unitycrnd
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// File: crnd_platform.h
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namespace unitycrnd {
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bool crnd_is_debugger_present();
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void crnd_debug_break();
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void crnd_output_debug_string(const char* p);
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// actually in crnd_assert.cpp
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void crnd_assert(const char* pExp, const char* pFile, unsigned line);
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void crnd_fail(const char* pExp, const char* pFile, unsigned line);
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} // namespace unitycrnd
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// File: crnd_assert.h
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namespace unitycrnd {
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void crnd_assert(const char* pExp, const char* pFile, unsigned line);
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#ifdef NDEBUG
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#define CRND_ASSERT(x) ((void)0)
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#undef CRND_ASSERTS_ENABLED
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#else
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#define CRND_ASSERT(_exp) (void)((!!(_exp)) || (unitycrnd::crnd_assert(#_exp, __FILE__, __LINE__), 0))
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#define CRND_ASSERTS_ENABLED
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#endif
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void crnd_trace(const char* pFmt, va_list args);
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void crnd_trace(const char* pFmt, ...);
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} // namespace unitycrnd
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// File: crnd_helpers.h
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namespace unitycrnd {
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namespace helpers {
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template <typename T>
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struct rel_ops {
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friend bool operator!=(const T& x, const T& y) { return (!(x == y)); }
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friend bool operator>(const T& x, const T& y) { return (y < x); }
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friend bool operator<=(const T& x, const T& y) { return (!(y < x)); }
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friend bool operator>=(const T& x, const T& y) { return (!(x < y)); }
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};
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template <typename T>
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inline T* construct(T* p) {
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return new (static_cast<void*>(p)) T;
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}
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template <typename T, typename U>
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inline T* construct(T* p, const U& init) {
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return new (static_cast<void*>(p)) T(init);
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}
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template <typename T>
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void construct_array(T* p, uint32 n) {
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T* q = p + n;
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for (; p != q; ++p)
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new (static_cast<void*>(p)) T;
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}
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template <typename T, typename U>
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void construct_array(T* p, uint32 n, const U& init) {
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T* q = p + n;
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for (; p != q; ++p)
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new (static_cast<void*>(p)) T(init);
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}
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template <typename T>
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inline void destruct(T* p) {
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p->~T();
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}
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template <typename T>
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inline void destruct_array(T* p, uint32 n) {
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T* q = p + n;
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for (; p != q; ++p)
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p->~T();
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}
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} // namespace helpers
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} // namespace unitycrnd
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// File: crnd_traits.h
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namespace unitycrnd {
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template <typename T>
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struct scalar_type {
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enum { cFlag = false };
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static inline void construct(T* p) { helpers::construct(p); }
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static inline void construct(T* p, const T& init) { helpers::construct(p, init); }
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static inline void construct_array(T* p, uint32 n) { helpers::construct_array(p, n); }
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static inline void destruct(T* p) { helpers::destruct(p); }
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static inline void destruct_array(T* p, uint32 n) { helpers::destruct_array(p, n); }
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};
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template <typename T>
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struct scalar_type<T*> {
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enum { cFlag = true };
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static inline void construct(T** p) { memset(p, 0, sizeof(T*)); }
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static inline void construct(T** p, T* init) { *p = init; }
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static inline void construct_array(T** p, uint32 n) { memset(p, 0, sizeof(T*) * n); }
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static inline void destruct(T**) {}
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static inline void destruct_array(T**, uint32) {}
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};
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#define CRND_DEFINE_BUILT_IN_TYPE(X) \
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template <> \
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struct scalar_type<X> { \
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enum { cFlag = true }; \
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static inline void construct(X* p) { memset(p, 0, sizeof(X)); } \
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static inline void construct(X* p, const X& init) { memcpy(p, &init, sizeof(X)); } \
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static inline void construct_array(X* p, uint32 n) { memset(p, 0, sizeof(X) * n); } \
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static inline void destruct(X*) {} \
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static inline void destruct_array(X*, uint32) {} \
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};
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CRND_DEFINE_BUILT_IN_TYPE(bool)
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CRND_DEFINE_BUILT_IN_TYPE(char)
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CRND_DEFINE_BUILT_IN_TYPE(unsigned char)
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CRND_DEFINE_BUILT_IN_TYPE(short)
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CRND_DEFINE_BUILT_IN_TYPE(unsigned short)
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CRND_DEFINE_BUILT_IN_TYPE(int)
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CRND_DEFINE_BUILT_IN_TYPE(unsigned int)
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CRND_DEFINE_BUILT_IN_TYPE(long)
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CRND_DEFINE_BUILT_IN_TYPE(unsigned long)
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CRND_DEFINE_BUILT_IN_TYPE(int64)
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CRND_DEFINE_BUILT_IN_TYPE(uint64)
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CRND_DEFINE_BUILT_IN_TYPE(float)
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CRND_DEFINE_BUILT_IN_TYPE(double)
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CRND_DEFINE_BUILT_IN_TYPE(long double)
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#undef CRND_DEFINE_BUILT_IN_TYPE
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// See: http://erdani.org/publications/cuj-2004-06.pdf
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template <typename T>
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struct bitwise_movable {
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enum { cFlag = false };
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};
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// Defines type Q as bitwise movable.
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#define CRND_DEFINE_BITWISE_MOVABLE(Q) \
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template <> \
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struct bitwise_movable<Q> { \
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enum { cFlag = true }; \
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};
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// From yasli_traits.h:
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// Credit goes to Boost;
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// also found in the C++ Templates book by Vandevoorde and Josuttis
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typedef char (&yes_t)[1];
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typedef char (&no_t)[2];
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template <class U>
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yes_t class_test(int U::*);
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template <class U>
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no_t class_test(...);
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template <class T>
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struct is_class {
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enum { value = (sizeof(class_test<T>(0)) == sizeof(yes_t)) };
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};
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template <typename T>
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struct is_pointer {
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enum { value = false };
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};
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template <typename T>
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struct is_pointer<T*> {
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enum { value = true };
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};
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#define CRND_IS_POD(T) __is_pod(T)
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} // namespace unitycrnd
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// File: crnd_mem.h
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namespace unitycrnd {
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void* crnd_malloc(size_t size, size_t* pActual_size = NULL);
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void* crnd_realloc(void* p, size_t size, size_t* pActual_size = NULL, bool movable = true);
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void crnd_free(void* p);
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size_t crnd_msize(void* p);
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template <typename T>
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inline T* crnd_new() {
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T* p = static_cast<T*>(crnd_malloc(sizeof(T)));
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if (!p)
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return NULL;
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return helpers::construct(p);
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}
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template <typename T>
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inline T* crnd_new(const T& init) {
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T* p = static_cast<T*>(crnd_malloc(sizeof(T)));
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if (!p)
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return NULL;
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return helpers::construct(p, init);
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}
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template <typename T>
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inline T* crnd_new_array(uint32 num) {
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if (!num)
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num = 1;
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uint8* q = static_cast<uint8*>(crnd_malloc(CRND_MIN_ALLOC_ALIGNMENT + sizeof(T) * num));
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if (!q)
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return NULL;
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T* p = reinterpret_cast<T*>(q + CRND_MIN_ALLOC_ALIGNMENT);
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reinterpret_cast<uint32*>(p)[-1] = num;
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reinterpret_cast<uint32*>(p)[-2] = ~num;
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helpers::construct_array(p, num);
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return p;
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}
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template <typename T>
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inline void crnd_delete(T* p) {
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if (p) {
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helpers::destruct(p);
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crnd_free(p);
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}
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}
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template <typename T>
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inline void crnd_delete_array(T* p) {
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if (p) {
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const uint32 num = reinterpret_cast<uint32*>(p)[-1];
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CRND_ASSERT(num && (num == ~reinterpret_cast<uint32*>(p)[-2]));
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helpers::destruct_array(p, num);
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crnd_free(reinterpret_cast<uint8*>(p) - CRND_MIN_ALLOC_ALIGNMENT);
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}
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}
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} // namespace unitycrnd
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// File: crnd_math.h
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namespace unitycrnd {
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namespace math {
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const float cNearlyInfinite = 1.0e+37f;
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const float cDegToRad = 0.01745329252f;
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const float cRadToDeg = 57.29577951f;
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extern uint32 g_bitmasks[32];
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// Yes I know these should probably be pass by ref, not val:
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// http://www.stepanovpapers.com/notes.pdf
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// Just don't use them on non-simple (non built-in) types!
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template <typename T>
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inline T minimum(T a, T b) {
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return (a < b) ? a : b;
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}
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template <typename T>
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inline T minimum(T a, T b, T c) {
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return minimum(minimum(a, b), c);
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}
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template <typename T>
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inline T maximum(T a, T b) {
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return (a > b) ? a : b;
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}
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template <typename T>
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inline T maximum(T a, T b, T c) {
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return maximum(maximum(a, b), c);
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}
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template <typename T>
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inline T clamp(T value, T low, T high) {
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return (value < low) ? low : ((value > high) ? high : value);
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}
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template <typename T>
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inline T square(T value) {
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return value * value;
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}
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inline bool is_power_of_2(uint32 x) {
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return x && ((x & (x - 1U)) == 0U);
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}
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// From "Hackers Delight"
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inline int next_pow2(uint32 val) {
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val--;
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val |= val >> 16;
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val |= val >> 8;
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val |= val >> 4;
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val |= val >> 2;
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val |= val >> 1;
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return val + 1;
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}
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// Returns the total number of bits needed to encode v.
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inline uint32 total_bits(uint32 v) {
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uint32 l = 0;
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while (v > 0U) {
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v >>= 1;
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l++;
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}
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return l;
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}
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inline uint floor_log2i(uint v) {
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uint l = 0;
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while (v > 1U) {
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v >>= 1;
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l++;
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}
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return l;
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}
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inline uint ceil_log2i(uint v) {
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uint l = floor_log2i(v);
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if ((l != cIntBits) && (v > (1U << l)))
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l++;
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return l;
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}
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}
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}
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// File: crnd_utils.h
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namespace unitycrnd {
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namespace utils {
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template <typename T>
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inline void zero_object(T& obj) {
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memset(&obj, 0, sizeof(obj));
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}
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template <typename T>
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inline void zero_this(T* pObj) {
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memset(pObj, 0, sizeof(*pObj));
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}
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template <typename T>
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inline void swap(T& left, T& right) {
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T temp(left);
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left = right;
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right = temp;
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}
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inline void invert_buf(void* pBuf, uint32 size) {
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uint8* p = static_cast<uint8*>(pBuf);
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const uint32 half_size = size >> 1;
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for (uint32 i = 0; i < half_size; i++)
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swap(p[i], p[size - 1U - i]);
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}
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static inline uint16 swap16(uint16 x) {
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return static_cast<uint16>((x << 8) | (x >> 8));
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}
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static inline uint32 swap32(uint32 x) {
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return ((x << 24) | ((x << 8) & 0x00FF0000) | ((x >> 8) & 0x0000FF00) | (x >> 24));
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}
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uint32 compute_max_mips(uint32 width, uint32 height);
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} // namespace utils
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} // namespace unitycrnd
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// File: crnd_vector.h
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namespace unitycrnd {
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struct elemental_vector {
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void* m_p;
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uint32 m_size;
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uint32 m_capacity;
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typedef void (*object_mover)(void* pDst, void* pSrc, uint32 num);
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bool increase_capacity(uint32 min_new_capacity, bool grow_hint, uint32 element_size, object_mover pRelocate);
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};
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable : 4127) // warning C4127: conditional expression is constant
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#endif
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template <typename T>
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class vector : public helpers::rel_ops<vector<T> > {
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public:
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typedef T* iterator;
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typedef const T* const_iterator;
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typedef T value_type;
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typedef T& reference;
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typedef const T& const_reference;
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typedef T* pointer;
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typedef const T* const_pointer;
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inline vector()
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: m_p(NULL),
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m_size(0),
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m_capacity(0),
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m_alloc_failed(false) {
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}
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inline vector(const vector& other)
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: m_p(NULL),
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m_size(0),
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m_capacity(0),
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m_alloc_failed(false) {
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*this = other;
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}
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inline vector(uint32 size)
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: m_p(NULL),
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m_size(0),
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m_capacity(0),
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m_alloc_failed(false) {
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resize(size);
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}
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|
|
inline ~vector() {
|
|
clear();
|
|
}
|
|
|
|
// I don't like this. Not at all. But exceptions, or just failing suck worse.
|
|
inline bool get_alloc_failed() const { return m_alloc_failed; }
|
|
inline void clear_alloc_failed() { m_alloc_failed = false; }
|
|
|
|
inline bool assign(const vector& other) {
|
|
if (this == &other)
|
|
return true;
|
|
|
|
if (m_capacity == other.m_size)
|
|
resize(0);
|
|
else {
|
|
clear();
|
|
|
|
if (!increase_capacity(other.m_size, false))
|
|
return false;
|
|
}
|
|
|
|
if (scalar_type<T>::cFlag)
|
|
memcpy(m_p, other.m_p, other.m_size * sizeof(T));
|
|
else {
|
|
T* pDst = m_p;
|
|
const T* pSrc = other.m_p;
|
|
for (uint32 i = other.m_size; i > 0; i--)
|
|
helpers::construct(pDst++, *pSrc++);
|
|
}
|
|
|
|
m_size = other.m_size;
|
|
|
|
return true;
|
|
}
|
|
|
|
inline vector& operator=(const vector& other) {
|
|
assign(other);
|
|
return *this;
|
|
}
|
|
|
|
inline const T* begin() const { return m_p; }
|
|
T* begin() { return m_p; }
|
|
|
|
inline const T* end() const { return m_p + m_size; }
|
|
T* end() { return m_p + m_size; }
|
|
|
|
inline bool empty() const { return !m_size; }
|
|
inline uint32 size() const { return m_size; }
|
|
inline uint32 capacity() const { return m_capacity; }
|
|
|
|
inline const T& operator[](uint32 i) const {
|
|
CRND_ASSERT(i < m_size);
|
|
return m_p[i];
|
|
}
|
|
inline T& operator[](uint32 i) {
|
|
CRND_ASSERT(i < m_size);
|
|
return m_p[i];
|
|
}
|
|
|
|
inline const T& front() const {
|
|
CRND_ASSERT(m_size);
|
|
return m_p[0];
|
|
}
|
|
inline T& front() {
|
|
CRND_ASSERT(m_size);
|
|
return m_p[0];
|
|
}
|
|
|
|
inline const T& back() const {
|
|
CRND_ASSERT(m_size);
|
|
return m_p[m_size - 1];
|
|
}
|
|
inline T& back() {
|
|
CRND_ASSERT(m_size);
|
|
return m_p[m_size - 1];
|
|
}
|
|
|
|
inline void clear() {
|
|
if (m_p) {
|
|
scalar_type<T>::destruct_array(m_p, m_size);
|
|
crnd_free(m_p);
|
|
m_p = NULL;
|
|
m_size = 0;
|
|
m_capacity = 0;
|
|
}
|
|
|
|
m_alloc_failed = false;
|
|
}
|
|
|
|
inline bool reserve(uint32 new_capacity) {
|
|
if (!increase_capacity(new_capacity, false))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
inline bool resize(uint32 new_size) {
|
|
if (m_size != new_size) {
|
|
if (new_size < m_size)
|
|
scalar_type<T>::destruct_array(m_p + new_size, m_size - new_size);
|
|
else {
|
|
if (new_size > m_capacity) {
|
|
if (!increase_capacity(new_size, new_size == (m_size + 1)))
|
|
return false;
|
|
}
|
|
|
|
scalar_type<T>::construct_array(m_p + m_size, new_size - m_size);
|
|
}
|
|
|
|
m_size = new_size;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
inline bool push_back(const T& obj) {
|
|
CRND_ASSERT(!m_p || (&obj < m_p) || (&obj >= (m_p + m_size)));
|
|
|
|
if (m_size >= m_capacity) {
|
|
if (!increase_capacity(m_size + 1, true))
|
|
return false;
|
|
}
|
|
|
|
scalar_type<T>::construct(m_p + m_size, obj);
|
|
m_size++;
|
|
|
|
return true;
|
|
}
|
|
|
|
inline void pop_back() {
|
|
CRND_ASSERT(m_size);
|
|
|
|
if (m_size) {
|
|
m_size--;
|
|
scalar_type<T>::destruct(&m_p[m_size]);
|
|
}
|
|
}
|
|
|
|
inline void insert(uint32 index, const T* p, uint32 n) {
|
|
CRND_ASSERT(index <= m_size);
|
|
if (!n)
|
|
return;
|
|
|
|
const uint32 orig_size = m_size;
|
|
resize(m_size + n);
|
|
|
|
const T* pSrc = m_p + orig_size - 1;
|
|
T* pDst = const_cast<T*>(pSrc) + n;
|
|
|
|
const uint32 num_to_move = orig_size - index;
|
|
|
|
for (uint32 i = 0; i < num_to_move; i++) {
|
|
CRND_ASSERT((pDst - m_p) < (int)m_size);
|
|
*pDst-- = *pSrc--;
|
|
}
|
|
|
|
pSrc = p;
|
|
pDst = m_p + index;
|
|
|
|
for (uint32 i = 0; i < n; i++) {
|
|
CRND_ASSERT((pDst - m_p) < (int)m_size);
|
|
*pDst++ = *p++;
|
|
}
|
|
}
|
|
|
|
inline void erase(uint32 start, uint32 n) {
|
|
CRND_ASSERT((start + n) <= m_size);
|
|
|
|
if (!n)
|
|
return;
|
|
|
|
const uint32 num_to_move = m_size - (start + n);
|
|
|
|
T* pDst = m_p + start;
|
|
T* pDst_end = pDst + num_to_move;
|
|
const T* pSrc = m_p + start + n;
|
|
|
|
while (pDst != pDst_end)
|
|
*pDst++ = *pSrc++;
|
|
|
|
scalar_type<T>::destruct_array(pDst_end, n);
|
|
|
|
m_size -= n;
|
|
}
|
|
|
|
inline void erase(uint32 index) {
|
|
erase(index, 1);
|
|
}
|
|
|
|
inline void erase(T* p) {
|
|
CRND_ASSERT((p >= m_p) && (p < (m_p + m_size)));
|
|
erase(p - m_p);
|
|
}
|
|
|
|
inline bool operator==(const vector& rhs) const {
|
|
if (m_size != rhs.m_size)
|
|
return false;
|
|
else if (m_size) {
|
|
if (scalar_type<T>::cFlag)
|
|
return memcmp(m_p, rhs.m_p, sizeof(T) * m_size) == 0;
|
|
else {
|
|
const T* pSrc = m_p;
|
|
const T* pDst = rhs.m_p;
|
|
for (uint32 i = m_size; i; i--)
|
|
if (!(*pSrc++ == *pDst++))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
inline bool operator<(const vector& rhs) const {
|
|
const uint32 min_size = math::minimum(m_size, rhs.m_size);
|
|
|
|
const T* pSrc = m_p;
|
|
const T* pSrc_end = m_p + min_size;
|
|
const T* pDst = rhs.m_p;
|
|
|
|
while ((pSrc < pSrc_end) && (*pSrc == *pDst)) {
|
|
pSrc++;
|
|
pDst++;
|
|
}
|
|
|
|
if (pSrc < pSrc_end)
|
|
return *pSrc < *pDst;
|
|
|
|
return m_size < rhs.m_size;
|
|
}
|
|
|
|
void swap(vector& other) {
|
|
utils::swap(m_p, other.m_p);
|
|
utils::swap(m_size, other.m_size);
|
|
utils::swap(m_capacity, other.m_capacity);
|
|
}
|
|
|
|
private:
|
|
T* m_p;
|
|
uint32 m_size;
|
|
uint32 m_capacity;
|
|
bool m_alloc_failed;
|
|
|
|
template <typename Q>
|
|
struct is_vector {
|
|
enum { cFlag = false };
|
|
};
|
|
template <typename Q>
|
|
struct is_vector<vector<Q> > {
|
|
enum { cFlag = true };
|
|
};
|
|
|
|
static void object_mover(void* pDst_void, void* pSrc_void, uint32 num) {
|
|
T* pSrc = static_cast<T*>(pSrc_void);
|
|
T* const pSrc_end = pSrc + num;
|
|
T* pDst = static_cast<T*>(pDst_void);
|
|
|
|
while (pSrc != pSrc_end) {
|
|
helpers::construct<T>(pDst, *pSrc);
|
|
pSrc->~T();
|
|
pSrc++;
|
|
pDst++;
|
|
}
|
|
}
|
|
|
|
inline bool increase_capacity(uint32 min_new_capacity, bool grow_hint) {
|
|
if (!reinterpret_cast<elemental_vector*>(this)->increase_capacity(
|
|
min_new_capacity, grow_hint, sizeof(T),
|
|
((scalar_type<T>::cFlag) || (is_vector<T>::cFlag) || (bitwise_movable<T>::cFlag) || CRND_IS_POD(T)) ? NULL : object_mover)) {
|
|
m_alloc_failed = true;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
};
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
extern void vector_test();
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_private.h
|
|
namespace unitycrnd {
|
|
const crn_header* crnd_get_header(const void* pData, uint32 data_size);
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: checksum.h
|
|
namespace unitycrnd {
|
|
// crc16() intended for small buffers - doesn't use an acceleration table.
|
|
const uint16 cInitCRC16 = 0;
|
|
uint16 crc16(const void* pBuf, uint32 len, uint16 crc = cInitCRC16);
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_color.h
|
|
namespace unitycrnd {
|
|
template <typename component_type>
|
|
struct color_quad_component_traits {
|
|
enum {
|
|
cSigned = false,
|
|
cFloat = false,
|
|
cMin = cUINT8_MIN,
|
|
cMax = cUINT8_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<int16> {
|
|
enum {
|
|
cSigned = true,
|
|
cFloat = false,
|
|
cMin = cINT16_MIN,
|
|
cMax = cINT16_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<uint16> {
|
|
enum {
|
|
cSigned = false,
|
|
cFloat = false,
|
|
cMin = cUINT16_MIN,
|
|
cMax = cUINT16_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<int32> {
|
|
enum {
|
|
cSigned = true,
|
|
cFloat = false,
|
|
cMin = cINT32_MIN,
|
|
cMax = cINT32_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<uint32> {
|
|
enum {
|
|
cSigned = false,
|
|
cFloat = false,
|
|
cMin = cUINT32_MIN,
|
|
cMax = cUINT32_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<float> {
|
|
enum {
|
|
cSigned = false,
|
|
cFloat = true,
|
|
cMin = cINT32_MIN,
|
|
cMax = cINT32_MAX
|
|
};
|
|
};
|
|
|
|
template <>
|
|
struct color_quad_component_traits<double> {
|
|
enum {
|
|
cSigned = false,
|
|
cFloat = true,
|
|
cMin = cINT32_MIN,
|
|
cMax = cINT32_MAX
|
|
};
|
|
};
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable : 4201) // warning C4201: nonstandard extension used : nameless struct/union
|
|
#pragma warning(disable : 4127) // warning C4127: conditional expression is constant
|
|
#endif
|
|
|
|
template <typename component_type, typename parameter_type>
|
|
class color_quad : public helpers::rel_ops<color_quad<component_type, parameter_type> > {
|
|
static parameter_type clamp(parameter_type v) {
|
|
if (component_traits::cFloat)
|
|
return v;
|
|
else {
|
|
if (v < component_traits::cMin)
|
|
return component_traits::cMin;
|
|
else if (v > component_traits::cMax)
|
|
return component_traits::cMax;
|
|
return v;
|
|
}
|
|
}
|
|
|
|
public:
|
|
typedef component_type component_t;
|
|
typedef parameter_type parameter_t;
|
|
typedef color_quad_component_traits<component_type> component_traits;
|
|
|
|
enum { cNumComps = 4 };
|
|
|
|
union {
|
|
struct
|
|
{
|
|
component_type r;
|
|
component_type g;
|
|
component_type b;
|
|
component_type a;
|
|
};
|
|
|
|
component_type c[cNumComps];
|
|
};
|
|
|
|
inline color_quad() {
|
|
}
|
|
|
|
inline color_quad(eClear)
|
|
: r(0), g(0), b(0), a(0) {
|
|
}
|
|
|
|
inline color_quad(const color_quad& other)
|
|
: r(other.r), g(other.g), b(other.b), a(other.a) {
|
|
}
|
|
|
|
inline color_quad(parameter_type y, parameter_type alpha = component_traits::cMax) {
|
|
set(y, alpha);
|
|
}
|
|
|
|
inline color_quad(parameter_type red, parameter_type green, parameter_type blue, parameter_type alpha = component_traits::cMax) {
|
|
set(red, green, blue, alpha);
|
|
}
|
|
|
|
template <typename other_component_type, typename other_parameter_type>
|
|
inline color_quad(const color_quad<other_component_type, other_parameter_type>& other)
|
|
: r(clamp(other.r)), g(clamp(other.g)), b(clamp(other.b)), a(clamp(other.a)) {
|
|
}
|
|
|
|
inline void clear() {
|
|
r = 0;
|
|
g = 0;
|
|
b = 0;
|
|
a = 0;
|
|
}
|
|
|
|
inline color_quad& operator=(const color_quad& other) {
|
|
r = other.r;
|
|
g = other.g;
|
|
b = other.b;
|
|
a = other.a;
|
|
return *this;
|
|
}
|
|
|
|
template <typename other_component_type, typename other_parameter_type>
|
|
inline color_quad& operator=(const color_quad<other_component_type, other_parameter_type>& other) {
|
|
r = clamp(other.r);
|
|
g = clamp(other.g);
|
|
b = clamp(other.b);
|
|
a = clamp(other.a);
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& set(parameter_type y, parameter_type alpha = component_traits::cMax) {
|
|
y = clamp(y);
|
|
r = static_cast<component_type>(y);
|
|
g = static_cast<component_type>(y);
|
|
b = static_cast<component_type>(y);
|
|
a = static_cast<component_type>(alpha);
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& set(parameter_type red, parameter_type green, parameter_type blue, parameter_type alpha = component_traits::cMax) {
|
|
r = static_cast<component_type>(clamp(red));
|
|
g = static_cast<component_type>(clamp(green));
|
|
b = static_cast<component_type>(clamp(blue));
|
|
a = static_cast<component_type>(clamp(alpha));
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& set_noclamp_rgba(parameter_type red, parameter_type green, parameter_type blue, parameter_type alpha) {
|
|
r = static_cast<component_type>(red);
|
|
g = static_cast<component_type>(green);
|
|
b = static_cast<component_type>(blue);
|
|
a = static_cast<component_type>(alpha);
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& set_noclamp_rgb(parameter_type red, parameter_type green, parameter_type blue) {
|
|
r = static_cast<component_type>(red);
|
|
g = static_cast<component_type>(green);
|
|
b = static_cast<component_type>(blue);
|
|
return *this;
|
|
}
|
|
|
|
static inline parameter_type get_min_comp() { return component_traits::cMin; }
|
|
static inline parameter_type get_max_comp() { return component_traits::cMax; }
|
|
static inline bool get_comps_are_signed() { return component_traits::cSigned; }
|
|
|
|
inline component_type operator[](uint32 i) const {
|
|
CRND_ASSERT(i < cNumComps);
|
|
return c[i];
|
|
}
|
|
inline component_type& operator[](uint32 i) {
|
|
CRND_ASSERT(i < cNumComps);
|
|
return c[i];
|
|
}
|
|
|
|
inline color_quad& set_component(uint32 i, parameter_type f) {
|
|
CRND_ASSERT(i < cNumComps);
|
|
|
|
c[i] = static_cast<component_type>(clamp(f));
|
|
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& clamp(const color_quad& l, const color_quad& h) {
|
|
for (uint32 i = 0; i < cNumComps; i++)
|
|
c[i] = static_cast<component_type>(math::clamp<parameter_type>(c[i], l[i], h[i]));
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& clamp(parameter_type l, parameter_type h) {
|
|
for (uint32 i = 0; i < cNumComps; i++)
|
|
c[i] = static_cast<component_type>(math::clamp<parameter_type>(c[i], l, h));
|
|
return *this;
|
|
}
|
|
|
|
// Returns CCIR 601 luma (consistent with color_utils::RGB_To_Y).
|
|
inline parameter_type get_luma() const {
|
|
return static_cast<parameter_type>((19595U * r + 38470U * g + 7471U * b + 32768) >> 16U);
|
|
}
|
|
|
|
// Returns REC 709 luma.
|
|
inline parameter_type get_luma_rec709() const {
|
|
return static_cast<parameter_type>((13938U * r + 46869U * g + 4729U * b + 32768U) >> 16U);
|
|
}
|
|
|
|
inline uint32 squared_distance(const color_quad& c, bool alpha = true) const {
|
|
return math::square(r - c.r) + math::square(g - c.g) + math::square(b - c.b) + (alpha ? math::square(a - c.a) : 0);
|
|
}
|
|
|
|
inline bool rgb_equals(const color_quad& rhs) const {
|
|
return (r == rhs.r) && (g == rhs.g) && (b == rhs.b);
|
|
}
|
|
|
|
inline bool operator==(const color_quad& rhs) const {
|
|
return (r == rhs.r) && (g == rhs.g) && (b == rhs.b) && (a == rhs.a);
|
|
}
|
|
|
|
inline bool operator<(const color_quad& rhs) const {
|
|
for (uint32 i = 0; i < cNumComps; i++) {
|
|
if (c[i] < rhs.c[i])
|
|
return true;
|
|
else if (!(c[i] == rhs.c[i]))
|
|
return false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
inline color_quad& operator+=(const color_quad& other) {
|
|
for (uint32 i = 0; i < 4; i++)
|
|
c[i] = static_cast<component_type>(clamp(c[i] + other.c[i]));
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& operator-=(const color_quad& other) {
|
|
for (uint32 i = 0; i < 4; i++)
|
|
c[i] = static_cast<component_type>(clamp(c[i] - other.c[i]));
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& operator*=(parameter_type v) {
|
|
for (uint32 i = 0; i < 4; i++)
|
|
c[i] = static_cast<component_type>(clamp(c[i] * v));
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad& operator/=(parameter_type v) {
|
|
for (uint32 i = 0; i < 4; i++)
|
|
c[i] = static_cast<component_type>(c[i] / v);
|
|
return *this;
|
|
}
|
|
|
|
inline color_quad get_swizzled(uint32 x, uint32 y, uint32 z, uint32 w) const {
|
|
CRND_ASSERT((x | y | z | w) < 4);
|
|
return color_quad(c[x], c[y], c[z], c[w]);
|
|
}
|
|
|
|
inline friend color_quad operator+(const color_quad& lhs, const color_quad& rhs) {
|
|
color_quad result(lhs);
|
|
result += rhs;
|
|
return result;
|
|
}
|
|
|
|
inline friend color_quad operator-(const color_quad& lhs, const color_quad& rhs) {
|
|
color_quad result(lhs);
|
|
result -= rhs;
|
|
return result;
|
|
}
|
|
|
|
inline friend color_quad operator*(const color_quad& lhs, parameter_type v) {
|
|
color_quad result(lhs);
|
|
result *= v;
|
|
return result;
|
|
}
|
|
|
|
friend inline color_quad operator/(const color_quad& lhs, parameter_type v) {
|
|
color_quad result(lhs);
|
|
result /= v;
|
|
return result;
|
|
}
|
|
|
|
friend inline color_quad operator*(parameter_type v, const color_quad& rhs) {
|
|
color_quad result(rhs);
|
|
result *= v;
|
|
return result;
|
|
}
|
|
|
|
inline uint32 get_min_component_index(bool alpha = true) const {
|
|
uint32 index = 0;
|
|
uint32 limit = alpha ? cNumComps : (cNumComps - 1);
|
|
for (uint32 i = 1; i < limit; i++)
|
|
if (c[i] < c[index])
|
|
index = i;
|
|
return index;
|
|
}
|
|
|
|
inline uint32 get_max_component_index(bool alpha = true) const {
|
|
uint32 index = 0;
|
|
uint32 limit = alpha ? cNumComps : (cNumComps - 1);
|
|
for (uint32 i = 1; i < limit; i++)
|
|
if (c[i] > c[index])
|
|
index = i;
|
|
return index;
|
|
}
|
|
|
|
inline void get_float4(float* pDst) {
|
|
for (uint32 i = 0; i < 4; i++)
|
|
pDst[i] = ((*this)[i] - component_traits::cMin) / float(component_traits::cMax - component_traits::cMin);
|
|
}
|
|
|
|
inline void get_float3(float* pDst) {
|
|
for (uint32 i = 0; i < 3; i++)
|
|
pDst[i] = ((*this)[i] - component_traits::cMin) / float(component_traits::cMax - component_traits::cMin);
|
|
}
|
|
|
|
static inline color_quad make_black() {
|
|
return color_quad(0, 0, 0, component_traits::cMax);
|
|
}
|
|
|
|
static inline color_quad make_white() {
|
|
return color_quad(component_traits::cMax, component_traits::cMax, component_traits::cMax, component_traits::cMax);
|
|
}
|
|
}; // class color_quad
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
template <typename c, typename q>
|
|
struct scalar_type<color_quad<c, q> > {
|
|
enum { cFlag = true };
|
|
static inline void construct(color_quad<c, q>* p) {}
|
|
static inline void construct(color_quad<c, q>* p, const color_quad<c, q>& init) { memcpy(p, &init, sizeof(color_quad<c, q>)); }
|
|
static inline void construct_array(color_quad<c, q>* p, uint32 n) { p, n; }
|
|
static inline void destruct(color_quad<c, q>* p) { p; }
|
|
static inline void destruct_array(color_quad<c, q>* p, uint32 n) { p, n; }
|
|
};
|
|
|
|
typedef color_quad<uint8, int> color_quad_u8;
|
|
typedef color_quad<int16, int> color_quad_i16;
|
|
typedef color_quad<uint16, int> color_quad_u16;
|
|
typedef color_quad<int32, int> color_quad_i32;
|
|
typedef color_quad<uint32, uint32> color_quad_u32;
|
|
typedef color_quad<float, float> color_quad_f;
|
|
typedef color_quad<double, double> color_quad_d;
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_dxt.h
|
|
namespace unitycrnd {
|
|
enum dxt_format {
|
|
cDXTInvalid = -1,
|
|
|
|
// cDXT1/1A must appear first!
|
|
cDXT1,
|
|
cDXT1A,
|
|
|
|
cDXT3,
|
|
cDXT5,
|
|
cDXT5A,
|
|
|
|
cDXN_XY, // inverted relative to standard ATI2, 360's DXN
|
|
cDXN_YX // standard ATI2
|
|
};
|
|
|
|
enum dxt_constants {
|
|
cDXTBlockShift = 2U,
|
|
cDXTBlockSize = 1U << cDXTBlockShift,
|
|
|
|
cDXT1BytesPerBlock = 8U,
|
|
cDXT5NBytesPerBlock = 16U,
|
|
|
|
cDXT1SelectorBits = 2U,
|
|
cDXT1SelectorValues = 1U << cDXT1SelectorBits,
|
|
cDXT1SelectorMask = cDXT1SelectorValues - 1U,
|
|
|
|
cDXT5SelectorBits = 3U,
|
|
cDXT5SelectorValues = 1U << cDXT5SelectorBits,
|
|
cDXT5SelectorMask = cDXT5SelectorValues - 1U
|
|
};
|
|
|
|
const float cDXT1MaxLinearValue = 3.0f;
|
|
const float cDXT1InvMaxLinearValue = 1.0f / 3.0f;
|
|
|
|
const float cDXT5MaxLinearValue = 7.0f;
|
|
const float cDXT5InvMaxLinearValue = 1.0f / 7.0f;
|
|
|
|
// Converts DXT1 raw color selector index to a linear value.
|
|
extern const uint8 g_dxt1_to_linear[cDXT1SelectorValues];
|
|
|
|
// Converts DXT5 raw alpha selector index to a linear value.
|
|
extern const uint8 g_dxt5_to_linear[cDXT5SelectorValues];
|
|
|
|
// Converts DXT1 linear color selector index to a raw value (inverse of g_dxt1_to_linear).
|
|
extern const uint8 g_dxt1_from_linear[cDXT1SelectorValues];
|
|
|
|
// Converts DXT5 linear alpha selector index to a raw value (inverse of g_dxt5_to_linear).
|
|
extern const uint8 g_dxt5_from_linear[cDXT5SelectorValues];
|
|
|
|
extern const uint8 g_six_alpha_invert_table[cDXT5SelectorValues];
|
|
extern const uint8 g_eight_alpha_invert_table[cDXT5SelectorValues];
|
|
|
|
struct dxt1_block {
|
|
uint8 m_low_color[2];
|
|
uint8 m_high_color[2];
|
|
|
|
enum { cNumSelectorBytes = 4 };
|
|
uint8 m_selectors[cNumSelectorBytes];
|
|
|
|
inline void clear() {
|
|
utils::zero_this(this);
|
|
}
|
|
|
|
// These methods assume the in-memory rep is in LE byte order.
|
|
inline uint32 get_low_color() const {
|
|
return m_low_color[0] | (m_low_color[1] << 8U);
|
|
}
|
|
|
|
inline uint32 get_high_color() const {
|
|
return m_high_color[0] | (m_high_color[1] << 8U);
|
|
}
|
|
|
|
inline void set_low_color(uint16 c) {
|
|
m_low_color[0] = static_cast<uint8>(c & 0xFF);
|
|
m_low_color[1] = static_cast<uint8>((c >> 8) & 0xFF);
|
|
}
|
|
|
|
inline void set_high_color(uint16 c) {
|
|
m_high_color[0] = static_cast<uint8>(c & 0xFF);
|
|
m_high_color[1] = static_cast<uint8>((c >> 8) & 0xFF);
|
|
}
|
|
|
|
inline uint32 get_selector(uint32 x, uint32 y) const {
|
|
CRND_ASSERT((x < 4U) && (y < 4U));
|
|
return (m_selectors[y] >> (x * cDXT1SelectorBits)) & cDXT1SelectorMask;
|
|
}
|
|
|
|
inline void set_selector(uint32 x, uint32 y, uint32 val) {
|
|
CRND_ASSERT((x < 4U) && (y < 4U) && (val < 4U));
|
|
|
|
m_selectors[y] &= (~(cDXT1SelectorMask << (x * cDXT1SelectorBits)));
|
|
m_selectors[y] |= (val << (x * cDXT1SelectorBits));
|
|
}
|
|
|
|
static uint16 pack_color(const color_quad_u8& color, bool scaled, uint32 bias = 127U);
|
|
static uint16 pack_color(uint32 r, uint32 g, uint32 b, bool scaled, uint32 bias = 127U);
|
|
|
|
static color_quad_u8 unpack_color(uint16 packed_color, bool scaled, uint32 alpha = 255U);
|
|
static void unpack_color(uint32& r, uint32& g, uint32& b, uint16 packed_color, bool scaled);
|
|
|
|
static uint32 get_block_colors3(color_quad_u8* pDst, uint16 color0, uint16 color1);
|
|
static uint32 get_block_colors4(color_quad_u8* pDst, uint16 color0, uint16 color1);
|
|
// pDst must point to an array at least cDXT1SelectorValues long.
|
|
static uint32 get_block_colors(color_quad_u8* pDst, uint16 color0, uint16 color1);
|
|
|
|
static color_quad_u8 unpack_endpoint(uint32 endpoints, uint32 index, bool scaled, uint32 alpha = 255U);
|
|
static uint32 pack_endpoints(uint32 lo, uint32 hi);
|
|
};
|
|
|
|
CRND_DEFINE_BITWISE_MOVABLE(dxt1_block);
|
|
|
|
struct dxt3_block {
|
|
enum { cNumAlphaBytes = 8 };
|
|
uint8 m_alpha[cNumAlphaBytes];
|
|
|
|
void set_alpha(uint32 x, uint32 y, uint32 value, bool scaled);
|
|
uint32 get_alpha(uint32 x, uint32 y, bool scaled) const;
|
|
};
|
|
|
|
CRND_DEFINE_BITWISE_MOVABLE(dxt3_block);
|
|
|
|
struct dxt5_block {
|
|
uint8 m_endpoints[2];
|
|
|
|
enum { cNumSelectorBytes = 6 };
|
|
uint8 m_selectors[cNumSelectorBytes];
|
|
|
|
inline void clear() {
|
|
utils::zero_this(this);
|
|
}
|
|
|
|
inline uint32 get_low_alpha() const {
|
|
return m_endpoints[0];
|
|
}
|
|
|
|
inline uint32 get_high_alpha() const {
|
|
return m_endpoints[1];
|
|
}
|
|
|
|
inline void set_low_alpha(uint32 i) {
|
|
CRND_ASSERT(i <= cUINT8_MAX);
|
|
m_endpoints[0] = static_cast<uint8>(i);
|
|
}
|
|
|
|
inline void set_high_alpha(uint32 i) {
|
|
CRND_ASSERT(i <= cUINT8_MAX);
|
|
m_endpoints[1] = static_cast<uint8>(i);
|
|
}
|
|
|
|
uint32 get_endpoints_as_word() const { return m_endpoints[0] | (m_endpoints[1] << 8); }
|
|
|
|
uint32 get_selectors_as_word(uint32 index) {
|
|
CRND_ASSERT(index < 3);
|
|
return m_selectors[index * 2] | (m_selectors[index * 2 + 1] << 8);
|
|
}
|
|
|
|
inline uint32 get_selector(uint32 x, uint32 y) const {
|
|
CRND_ASSERT((x < 4U) && (y < 4U));
|
|
|
|
uint32 selector_index = (y * 4) + x;
|
|
uint32 bit_index = selector_index * cDXT5SelectorBits;
|
|
|
|
uint32 byte_index = bit_index >> 3;
|
|
uint32 bit_ofs = bit_index & 7;
|
|
|
|
uint32 v = m_selectors[byte_index];
|
|
if (byte_index < (cNumSelectorBytes - 1))
|
|
v |= (m_selectors[byte_index + 1] << 8);
|
|
|
|
return (v >> bit_ofs) & 7;
|
|
}
|
|
|
|
inline void set_selector(uint32 x, uint32 y, uint32 val) {
|
|
CRND_ASSERT((x < 4U) && (y < 4U) && (val < 8U));
|
|
|
|
uint32 selector_index = (y * 4) + x;
|
|
uint32 bit_index = selector_index * cDXT5SelectorBits;
|
|
|
|
uint32 byte_index = bit_index >> 3;
|
|
uint32 bit_ofs = bit_index & 7;
|
|
|
|
uint32 v = m_selectors[byte_index];
|
|
if (byte_index < (cNumSelectorBytes - 1))
|
|
v |= (m_selectors[byte_index + 1] << 8);
|
|
|
|
v &= (~(7 << bit_ofs));
|
|
v |= (val << bit_ofs);
|
|
|
|
m_selectors[byte_index] = static_cast<uint8>(v);
|
|
if (byte_index < (cNumSelectorBytes - 1))
|
|
m_selectors[byte_index + 1] = static_cast<uint8>(v >> 8);
|
|
}
|
|
|
|
// Results written to alpha channel.
|
|
static uint32 get_block_values6(color_quad_u8* pDst, uint32 l, uint32 h);
|
|
static uint32 get_block_values8(color_quad_u8* pDst, uint32 l, uint32 h);
|
|
static uint32 get_block_values(color_quad_u8* pDst, uint32 l, uint32 h);
|
|
|
|
static uint32 get_block_values6(uint32* pDst, uint32 l, uint32 h);
|
|
static uint32 get_block_values8(uint32* pDst, uint32 l, uint32 h);
|
|
// pDst must point to an array at least cDXT5SelectorValues long.
|
|
static uint32 get_block_values(uint32* pDst, uint32 l, uint32 h);
|
|
|
|
static uint32 unpack_endpoint(uint32 packed, uint32 index);
|
|
static uint32 pack_endpoints(uint32 lo, uint32 hi);
|
|
};
|
|
|
|
CRND_DEFINE_BITWISE_MOVABLE(dxt5_block);
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_prefix_coding.h
|
|
#ifdef _XBOX
|
|
#define CRND_PREFIX_CODING_USE_FIXED_TABLE_SIZE 1
|
|
#else
|
|
#define CRND_PREFIX_CODING_USE_FIXED_TABLE_SIZE 0
|
|
#endif
|
|
|
|
namespace unitycrnd {
|
|
namespace prefix_coding {
|
|
const uint32 cMaxExpectedCodeSize = 16;
|
|
const uint32 cMaxSupportedSyms = 8192;
|
|
const uint32 cMaxTableBits = 11;
|
|
|
|
class decoder_tables {
|
|
public:
|
|
inline decoder_tables()
|
|
: m_cur_lookup_size(0), m_lookup(NULL), m_cur_sorted_symbol_order_size(0), m_sorted_symbol_order(NULL) {
|
|
}
|
|
|
|
inline decoder_tables(const decoder_tables& other)
|
|
: m_cur_lookup_size(0), m_lookup(NULL), m_cur_sorted_symbol_order_size(0), m_sorted_symbol_order(NULL) {
|
|
*this = other;
|
|
}
|
|
|
|
decoder_tables& operator=(const decoder_tables& other) {
|
|
if (this == &other)
|
|
return *this;
|
|
|
|
clear();
|
|
|
|
memcpy(this, &other, sizeof(*this));
|
|
|
|
if (other.m_lookup) {
|
|
m_lookup = crnd_new_array<uint32>(m_cur_lookup_size);
|
|
if (m_lookup)
|
|
memcpy(m_lookup, other.m_lookup, sizeof(m_lookup[0]) * m_cur_lookup_size);
|
|
}
|
|
|
|
if (other.m_sorted_symbol_order) {
|
|
m_sorted_symbol_order = crnd_new_array<uint16>(m_cur_sorted_symbol_order_size);
|
|
if (m_sorted_symbol_order)
|
|
memcpy(m_sorted_symbol_order, other.m_sorted_symbol_order, sizeof(m_sorted_symbol_order[0]) * m_cur_sorted_symbol_order_size);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
inline void clear() {
|
|
if (m_lookup) {
|
|
crnd_delete_array(m_lookup);
|
|
m_lookup = 0;
|
|
m_cur_lookup_size = 0;
|
|
}
|
|
|
|
if (m_sorted_symbol_order) {
|
|
crnd_delete_array(m_sorted_symbol_order);
|
|
m_sorted_symbol_order = NULL;
|
|
m_cur_sorted_symbol_order_size = 0;
|
|
}
|
|
}
|
|
|
|
inline ~decoder_tables() {
|
|
if (m_lookup)
|
|
crnd_delete_array(m_lookup);
|
|
|
|
if (m_sorted_symbol_order)
|
|
crnd_delete_array(m_sorted_symbol_order);
|
|
}
|
|
|
|
bool init(uint32 num_syms, const uint8* pCodesizes, uint32 table_bits);
|
|
|
|
// DO NOT use any complex classes here - it is bitwise copied.
|
|
|
|
uint32 m_num_syms;
|
|
uint32 m_total_used_syms;
|
|
uint32 m_table_bits;
|
|
uint32 m_table_shift;
|
|
uint32 m_table_max_code;
|
|
uint32 m_decode_start_code_size;
|
|
|
|
uint8 m_min_code_size;
|
|
uint8 m_max_code_size;
|
|
|
|
uint32 m_max_codes[cMaxExpectedCodeSize + 1];
|
|
int32 m_val_ptrs[cMaxExpectedCodeSize + 1];
|
|
|
|
uint32 m_cur_lookup_size;
|
|
uint32* m_lookup;
|
|
|
|
uint32 m_cur_sorted_symbol_order_size;
|
|
uint16* m_sorted_symbol_order;
|
|
|
|
inline uint32 get_unshifted_max_code(uint32 len) const {
|
|
CRND_ASSERT((len >= 1) && (len <= cMaxExpectedCodeSize));
|
|
uint32 k = m_max_codes[len - 1];
|
|
if (!k)
|
|
return unitycrnd::cUINT32_MAX;
|
|
return (k - 1) >> (16 - len);
|
|
}
|
|
};
|
|
|
|
} // namespace prefix_coding
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_symbol_codec.h
|
|
namespace unitycrnd {
|
|
class static_huffman_data_model {
|
|
public:
|
|
static_huffman_data_model();
|
|
static_huffman_data_model(const static_huffman_data_model& other);
|
|
~static_huffman_data_model();
|
|
|
|
static_huffman_data_model& operator=(const static_huffman_data_model& rhs);
|
|
|
|
bool init(uint32 total_syms, const uint8* pCode_sizes, uint32 code_size_limit);
|
|
void clear();
|
|
|
|
inline bool is_valid() const { return m_pDecode_tables != NULL; }
|
|
|
|
inline uint32 get_total_syms() const { return m_total_syms; }
|
|
|
|
inline uint32 get_code_size(uint32 sym) const { return m_code_sizes[sym]; }
|
|
|
|
inline const uint8* get_code_sizes() const { return m_code_sizes.empty() ? NULL : &m_code_sizes[0]; }
|
|
|
|
public:
|
|
uint32 m_total_syms;
|
|
unitycrnd::vector<uint8> m_code_sizes;
|
|
prefix_coding::decoder_tables* m_pDecode_tables;
|
|
|
|
private:
|
|
bool prepare_decoder_tables();
|
|
uint compute_decoder_table_bits() const;
|
|
|
|
friend class symbol_codec;
|
|
};
|
|
|
|
class symbol_codec {
|
|
public:
|
|
symbol_codec();
|
|
|
|
bool start_decoding(const uint8* pBuf, uint32 buf_size);
|
|
bool decode_receive_static_data_model(static_huffman_data_model& model);
|
|
|
|
uint32 decode_bits(uint32 num_bits);
|
|
uint32 decode(const static_huffman_data_model& model);
|
|
|
|
uint64 stop_decoding();
|
|
|
|
public:
|
|
const uint8* m_pDecode_buf;
|
|
const uint8* m_pDecode_buf_next;
|
|
const uint8* m_pDecode_buf_end;
|
|
uint32 m_decode_buf_size;
|
|
|
|
typedef uint32 bit_buf_type;
|
|
enum { cBitBufSize = 32U };
|
|
bit_buf_type m_bit_buf;
|
|
|
|
int m_bit_count;
|
|
|
|
private:
|
|
void get_bits_init();
|
|
uint32 get_bits(uint32 num_bits);
|
|
};
|
|
|
|
} // namespace unitycrnd
|
|
|
|
namespace unitycrnd {
|
|
void crnd_assert(const char* pExp, const char* pFile, unsigned line) {
|
|
char buf[512];
|
|
|
|
#if defined(_WIN32) && defined(_MSC_VER)
|
|
sprintf_s(buf, sizeof(buf), "%s(%u): Assertion failure: \"%s\"\n", pFile, line, pExp);
|
|
#else
|
|
sprintf(buf, "%s(%u): Assertion failure: \"%s\"\n", pFile, line, pExp);
|
|
#endif
|
|
|
|
crnd_output_debug_string(buf);
|
|
|
|
puts(buf);
|
|
|
|
if (crnd_is_debugger_present())
|
|
crnd_debug_break();
|
|
}
|
|
|
|
void crnd_trace(const char* pFmt, va_list args) {
|
|
if (crnd_is_debugger_present()) {
|
|
char buf[512];
|
|
#if defined(_WIN32) && defined(_MSC_VER)
|
|
vsprintf_s(buf, sizeof(buf), pFmt, args);
|
|
#else
|
|
vsprintf(buf, pFmt, args);
|
|
#endif
|
|
|
|
crnd_output_debug_string(buf);
|
|
}
|
|
};
|
|
|
|
void crnd_trace(const char* pFmt, ...) {
|
|
va_list args;
|
|
va_start(args, pFmt);
|
|
crnd_trace(pFmt, args);
|
|
va_end(args);
|
|
};
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: checksum.cpp
|
|
// From the public domain stb.h header.
|
|
namespace unitycrnd {
|
|
uint16 crc16(const void* pBuf, uint32 len, uint16 crc) {
|
|
crc = ~crc;
|
|
|
|
const uint8* p = reinterpret_cast<const uint8*>(pBuf);
|
|
while (len) {
|
|
const uint16 q = *p++ ^ (crc >> 8U);
|
|
crc <<= 8U;
|
|
|
|
uint16 r = (q >> 4U) ^ q;
|
|
crc ^= r;
|
|
r <<= 5U;
|
|
crc ^= r;
|
|
r <<= 7U;
|
|
crc ^= r;
|
|
|
|
len--;
|
|
}
|
|
|
|
return static_cast<uint16>(~crc);
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_vector.cpp
|
|
namespace unitycrnd {
|
|
bool elemental_vector::increase_capacity(uint32 min_new_capacity, bool grow_hint, uint32 element_size, object_mover pMover) {
|
|
CRND_ASSERT(m_size <= m_capacity);
|
|
CRND_ASSERT(min_new_capacity < (0x7FFF0000U / element_size));
|
|
|
|
if (m_capacity >= min_new_capacity)
|
|
return true;
|
|
|
|
uint32 new_capacity = min_new_capacity;
|
|
if ((grow_hint) && (!math::is_power_of_2(new_capacity)))
|
|
new_capacity = math::next_pow2(new_capacity);
|
|
|
|
CRND_ASSERT(new_capacity && (new_capacity > m_capacity));
|
|
|
|
const uint32 desired_size = element_size * new_capacity;
|
|
size_t actual_size;
|
|
if (!pMover) {
|
|
void* new_p = crnd_realloc(m_p, desired_size, &actual_size, true);
|
|
if (!new_p)
|
|
return false;
|
|
m_p = new_p;
|
|
} else {
|
|
void* new_p = crnd_malloc(desired_size, &actual_size);
|
|
if (!new_p)
|
|
return false;
|
|
|
|
(*pMover)(new_p, m_p, m_size);
|
|
|
|
if (m_p)
|
|
crnd_free(m_p);
|
|
|
|
m_p = new_p;
|
|
}
|
|
|
|
if (actual_size > desired_size)
|
|
m_capacity = static_cast<uint32>(actual_size / element_size);
|
|
else
|
|
m_capacity = new_capacity;
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_utils.cpp
|
|
namespace unitycrnd {
|
|
namespace utils {
|
|
uint32 compute_max_mips(uint32 width, uint32 height) {
|
|
if ((width | height) == 0)
|
|
return 0;
|
|
|
|
uint32 num_mips = 1;
|
|
|
|
while ((width > 1U) || (height > 1U)) {
|
|
width >>= 1U;
|
|
height >>= 1U;
|
|
num_mips++;
|
|
}
|
|
|
|
return num_mips;
|
|
}
|
|
|
|
} // namespace utils
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_prefix_coding.cpp
|
|
namespace unitycrnd {
|
|
namespace prefix_coding {
|
|
bool decoder_tables::init(uint32 num_syms, const uint8* pCodesizes, uint32 table_bits) {
|
|
uint32 min_codes[cMaxExpectedCodeSize];
|
|
if ((!num_syms) || (table_bits > cMaxTableBits))
|
|
return false;
|
|
|
|
m_num_syms = num_syms;
|
|
|
|
uint32 num_codes[cMaxExpectedCodeSize + 1];
|
|
utils::zero_object(num_codes);
|
|
|
|
for (uint32 i = 0; i < num_syms; i++) {
|
|
uint32 c = pCodesizes[i];
|
|
if (c)
|
|
num_codes[c]++;
|
|
}
|
|
|
|
uint32 sorted_positions[cMaxExpectedCodeSize + 1];
|
|
|
|
uint32 cur_code = 0;
|
|
|
|
uint32 total_used_syms = 0;
|
|
uint32 max_code_size = 0;
|
|
uint32 min_code_size = cUINT32_MAX;
|
|
for (uint32 i = 1; i <= cMaxExpectedCodeSize; i++) {
|
|
const uint32 n = num_codes[i];
|
|
|
|
if (!n)
|
|
m_max_codes[i - 1] = 0; //UINT_MAX;
|
|
else {
|
|
min_code_size = math::minimum(min_code_size, i);
|
|
max_code_size = math::maximum(max_code_size, i);
|
|
|
|
min_codes[i - 1] = cur_code;
|
|
|
|
m_max_codes[i - 1] = cur_code + n - 1;
|
|
m_max_codes[i - 1] = 1 + ((m_max_codes[i - 1] << (16 - i)) | ((1 << (16 - i)) - 1));
|
|
|
|
m_val_ptrs[i - 1] = total_used_syms;
|
|
|
|
sorted_positions[i] = total_used_syms;
|
|
|
|
cur_code += n;
|
|
total_used_syms += n;
|
|
}
|
|
|
|
cur_code <<= 1;
|
|
}
|
|
|
|
m_total_used_syms = total_used_syms;
|
|
|
|
if (total_used_syms > m_cur_sorted_symbol_order_size) {
|
|
m_cur_sorted_symbol_order_size = total_used_syms;
|
|
|
|
if (!math::is_power_of_2(total_used_syms))
|
|
m_cur_sorted_symbol_order_size = math::minimum<uint32>(num_syms, math::next_pow2(total_used_syms));
|
|
|
|
if (m_sorted_symbol_order)
|
|
crnd_delete_array(m_sorted_symbol_order);
|
|
|
|
m_sorted_symbol_order = crnd_new_array<uint16>(m_cur_sorted_symbol_order_size);
|
|
if (!m_sorted_symbol_order)
|
|
return false;
|
|
}
|
|
|
|
m_min_code_size = static_cast<uint8>(min_code_size);
|
|
m_max_code_size = static_cast<uint8>(max_code_size);
|
|
|
|
for (uint32 i = 0; i < num_syms; i++) {
|
|
uint32 c = pCodesizes[i];
|
|
if (c) {
|
|
CRND_ASSERT(num_codes[c]);
|
|
|
|
uint32 sorted_pos = sorted_positions[c]++;
|
|
|
|
CRND_ASSERT(sorted_pos < total_used_syms);
|
|
|
|
m_sorted_symbol_order[sorted_pos] = static_cast<uint16>(i);
|
|
}
|
|
}
|
|
|
|
if (table_bits <= m_min_code_size)
|
|
table_bits = 0;
|
|
m_table_bits = table_bits;
|
|
|
|
if (table_bits) {
|
|
uint32 table_size = 1 << table_bits;
|
|
if (table_size > m_cur_lookup_size) {
|
|
m_cur_lookup_size = table_size;
|
|
|
|
if (m_lookup)
|
|
crnd_delete_array(m_lookup);
|
|
|
|
m_lookup = crnd_new_array<uint32>(table_size);
|
|
if (!m_lookup)
|
|
return false;
|
|
}
|
|
|
|
memset(m_lookup, 0xFF, (uint)sizeof(m_lookup[0]) * (1UL << table_bits));
|
|
|
|
for (uint32 codesize = 1; codesize <= table_bits; codesize++) {
|
|
if (!num_codes[codesize])
|
|
continue;
|
|
|
|
const uint32 fillsize = table_bits - codesize;
|
|
const uint32 fillnum = 1 << fillsize;
|
|
|
|
const uint32 min_code = min_codes[codesize - 1];
|
|
const uint32 max_code = get_unshifted_max_code(codesize);
|
|
const uint32 val_ptr = m_val_ptrs[codesize - 1];
|
|
|
|
for (uint32 code = min_code; code <= max_code; code++) {
|
|
const uint32 sym_index = m_sorted_symbol_order[val_ptr + code - min_code];
|
|
CRND_ASSERT(pCodesizes[sym_index] == codesize);
|
|
|
|
for (uint32 j = 0; j < fillnum; j++) {
|
|
const uint32 t = j + (code << fillsize);
|
|
|
|
CRND_ASSERT(t < (1U << table_bits));
|
|
|
|
CRND_ASSERT(m_lookup[t] == cUINT32_MAX);
|
|
|
|
m_lookup[t] = sym_index | (codesize << 16U);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for (uint32 i = 0; i < cMaxExpectedCodeSize; i++)
|
|
m_val_ptrs[i] -= min_codes[i];
|
|
|
|
m_table_max_code = 0;
|
|
m_decode_start_code_size = m_min_code_size;
|
|
|
|
if (table_bits) {
|
|
uint32 i;
|
|
for (i = table_bits; i >= 1; i--) {
|
|
if (num_codes[i]) {
|
|
m_table_max_code = m_max_codes[i - 1];
|
|
break;
|
|
}
|
|
}
|
|
if (i >= 1) {
|
|
m_decode_start_code_size = table_bits + 1;
|
|
for (uint32 j = table_bits + 1; j <= max_code_size; j++) {
|
|
if (num_codes[j]) {
|
|
m_decode_start_code_size = j;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// sentinels
|
|
m_max_codes[cMaxExpectedCodeSize] = cUINT32_MAX;
|
|
m_val_ptrs[cMaxExpectedCodeSize] = 0xFFFFF;
|
|
|
|
m_table_shift = 32 - m_table_bits;
|
|
return true;
|
|
}
|
|
|
|
} // namespace prefix_codig
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_platform.cpp
|
|
namespace unitycrnd {
|
|
bool crnd_is_debugger_present() {
|
|
#ifdef CRND_DEVEL
|
|
return IsDebuggerPresent() != 0;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
void crnd_debug_break() {
|
|
#ifdef CRND_DEVEL
|
|
DebugBreak();
|
|
#endif
|
|
}
|
|
|
|
void crnd_output_debug_string(const char* p) {
|
|
(void)p;
|
|
#ifdef CRND_DEVEL
|
|
OutputDebugStringA(p);
|
|
#endif
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_mem.cpp
|
|
namespace unitycrnd {
|
|
const uint32 MAX_POSSIBLE_BLOCK_SIZE = 0x7FFF0000U;
|
|
|
|
static void* crnd_default_realloc(void* p, size_t size, size_t* pActual_size, bool movable, void*) {
|
|
void* p_new;
|
|
|
|
if (!p) {
|
|
p_new = ::malloc(size);
|
|
|
|
if (pActual_size) {
|
|
#ifdef _WIN32
|
|
*pActual_size = p_new ? ::_msize(p_new) : 0;
|
|
#else
|
|
*pActual_size = p_new ? malloc_usable_size(p_new) : 0;
|
|
#endif
|
|
}
|
|
} else if (!size) {
|
|
::free(p);
|
|
p_new = NULL;
|
|
|
|
if (pActual_size)
|
|
*pActual_size = 0;
|
|
} else {
|
|
void* p_final_block = p;
|
|
#ifdef _WIN32
|
|
p_new = ::_expand(p, size);
|
|
#else
|
|
p_new = NULL;
|
|
#endif
|
|
|
|
if (p_new)
|
|
p_final_block = p_new;
|
|
else if (movable) {
|
|
p_new = ::realloc(p, size);
|
|
|
|
if (p_new)
|
|
p_final_block = p_new;
|
|
}
|
|
|
|
if (pActual_size) {
|
|
#ifdef _WIN32
|
|
*pActual_size = ::_msize(p_final_block);
|
|
#else
|
|
*pActual_size = ::malloc_usable_size(p_final_block);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return p_new;
|
|
}
|
|
|
|
static size_t crnd_default_msize(void* p, void* pUser_data) {
|
|
pUser_data;
|
|
#ifdef _WIN32
|
|
return p ? _msize(p) : 0;
|
|
#else
|
|
return p ? malloc_usable_size(p) : 0;
|
|
#endif
|
|
}
|
|
|
|
static crnd_realloc_func g_pRealloc = crnd_default_realloc;
|
|
static crnd_msize_func g_pMSize = crnd_default_msize;
|
|
static void* g_pUser_data;
|
|
|
|
void crnd_set_memory_callbacks(crnd_realloc_func pRealloc, crnd_msize_func pMSize, void* pUser_data) {
|
|
if ((!pRealloc) || (!pMSize)) {
|
|
g_pRealloc = crnd_default_realloc;
|
|
g_pMSize = crnd_default_msize;
|
|
g_pUser_data = NULL;
|
|
} else {
|
|
g_pRealloc = pRealloc;
|
|
g_pMSize = pMSize;
|
|
g_pUser_data = pUser_data;
|
|
}
|
|
}
|
|
|
|
static inline void crnd_mem_error(const char* p_msg) {
|
|
crnd_assert(p_msg, __FILE__, __LINE__);
|
|
}
|
|
|
|
void* crnd_malloc(size_t size, size_t* pActual_size) {
|
|
size = (size + sizeof(uint32) - 1U) & ~(sizeof(uint32) - 1U);
|
|
if (!size)
|
|
size = sizeof(uint32);
|
|
|
|
if (size > MAX_POSSIBLE_BLOCK_SIZE) {
|
|
crnd_mem_error("crnd_malloc: size too big");
|
|
return NULL;
|
|
}
|
|
|
|
size_t actual_size = size;
|
|
uint8* p_new = static_cast<uint8*>((*g_pRealloc)(NULL, size, &actual_size, true, g_pUser_data));
|
|
|
|
if (pActual_size)
|
|
*pActual_size = actual_size;
|
|
|
|
if ((!p_new) || (actual_size < size)) {
|
|
crnd_mem_error("crnd_malloc: out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
CRND_ASSERT(((uint32) reinterpret_cast<uintptr_t>(p_new) & (CRND_MIN_ALLOC_ALIGNMENT - 1)) == 0);
|
|
|
|
return p_new;
|
|
}
|
|
|
|
void* crnd_realloc(void* p, size_t size, size_t* pActual_size, bool movable) {
|
|
if ((uint32) reinterpret_cast<uintptr_t>(p) & (CRND_MIN_ALLOC_ALIGNMENT - 1)) {
|
|
crnd_mem_error("crnd_realloc: bad ptr");
|
|
return NULL;
|
|
}
|
|
|
|
if (size > MAX_POSSIBLE_BLOCK_SIZE) {
|
|
crnd_mem_error("crnd_malloc: size too big");
|
|
return NULL;
|
|
}
|
|
|
|
size_t actual_size = size;
|
|
void* p_new = (*g_pRealloc)(p, size, &actual_size, movable, g_pUser_data);
|
|
|
|
if (pActual_size)
|
|
*pActual_size = actual_size;
|
|
|
|
CRND_ASSERT(((uint32) reinterpret_cast<uintptr_t>(p_new) & (CRND_MIN_ALLOC_ALIGNMENT - 1)) == 0);
|
|
|
|
return p_new;
|
|
}
|
|
|
|
void crnd_free(void* p) {
|
|
if (!p)
|
|
return;
|
|
|
|
if ((uint32) reinterpret_cast<uintptr_t>(p) & (CRND_MIN_ALLOC_ALIGNMENT - 1)) {
|
|
crnd_mem_error("crnd_free: bad ptr");
|
|
return;
|
|
}
|
|
|
|
(*g_pRealloc)(p, 0, NULL, true, g_pUser_data);
|
|
}
|
|
|
|
size_t crnd_msize(void* p) {
|
|
if (!p)
|
|
return 0;
|
|
|
|
if ((uint32) reinterpret_cast<uintptr_t>(p) & (CRND_MIN_ALLOC_ALIGNMENT - 1)) {
|
|
crnd_mem_error("crnd_msize: bad ptr");
|
|
return 0;
|
|
}
|
|
|
|
return (*g_pMSize)(p, g_pUser_data);
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_math.cpp
|
|
namespace unitycrnd {
|
|
namespace math {
|
|
uint32 g_bitmasks[32] =
|
|
{
|
|
1U << 0U, 1U << 1U, 1U << 2U, 1U << 3U,
|
|
1U << 4U, 1U << 5U, 1U << 6U, 1U << 7U,
|
|
1U << 8U, 1U << 9U, 1U << 10U, 1U << 11U,
|
|
1U << 12U, 1U << 13U, 1U << 14U, 1U << 15U,
|
|
1U << 16U, 1U << 17U, 1U << 18U, 1U << 19U,
|
|
1U << 20U, 1U << 21U, 1U << 22U, 1U << 23U,
|
|
1U << 24U, 1U << 25U, 1U << 26U, 1U << 27U,
|
|
1U << 28U, 1U << 29U, 1U << 30U, 1U << 31U};
|
|
|
|
} // namespace math
|
|
} // namespace unitycrnd
|
|
|
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// File: crnd_info.cpp
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namespace unitycrnd {
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#define CRND_FOURCC(a, b, c, d) ((a) | ((b) << 8U) | ((c) << 16U) | ((d) << 24U))
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uint32 crnd_crn_format_to_fourcc(crn_format fmt) {
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switch (fmt) {
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case cCRNFmtDXT1:
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return CRND_FOURCC('D', 'X', 'T', '1');
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case cCRNFmtDXT3:
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return CRND_FOURCC('D', 'X', 'T', '3');
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case cCRNFmtDXT5:
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return CRND_FOURCC('D', 'X', 'T', '5');
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case cCRNFmtDXN_XY:
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return CRND_FOURCC('A', '2', 'X', 'Y');
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case cCRNFmtDXN_YX:
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return CRND_FOURCC('A', 'T', 'I', '2');
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case cCRNFmtDXT5A:
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return CRND_FOURCC('A', 'T', 'I', '1');
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case cCRNFmtDXT5_CCxY:
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return CRND_FOURCC('C', 'C', 'x', 'Y');
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case cCRNFmtDXT5_xGxR:
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return CRND_FOURCC('x', 'G', 'x', 'R');
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case cCRNFmtDXT5_xGBR:
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return CRND_FOURCC('x', 'G', 'B', 'R');
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case cCRNFmtDXT5_AGBR:
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return CRND_FOURCC('A', 'G', 'B', 'R');
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case cCRNFmtETC1:
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return CRND_FOURCC('E', 'T', 'C', '1');
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case cCRNFmtETC2:
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return CRND_FOURCC('E', 'T', 'C', '2');
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case cCRNFmtETC2A:
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return CRND_FOURCC('E', 'T', '2', 'A');
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case cCRNFmtETC1S:
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return CRND_FOURCC('E', 'T', '1', 'S');
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case cCRNFmtETC2AS:
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return CRND_FOURCC('E', '2', 'A', 'S');
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default:
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break;
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}
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CRND_ASSERT(false);
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return 0;
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}
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crn_format crnd_get_fundamental_dxt_format(crn_format fmt) {
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switch (fmt) {
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case cCRNFmtDXT5_CCxY:
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case cCRNFmtDXT5_xGxR:
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case cCRNFmtDXT5_xGBR:
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case cCRNFmtDXT5_AGBR:
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return cCRNFmtDXT5;
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default:
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break;
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}
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return fmt;
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}
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uint32 crnd_get_crn_format_bits_per_texel(crn_format fmt) {
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switch (fmt) {
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case cCRNFmtDXT1:
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case cCRNFmtDXT5A:
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case cCRNFmtETC1:
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case cCRNFmtETC2:
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case cCRNFmtETC1S:
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return 4;
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case cCRNFmtDXT3:
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case cCRNFmtDXT5:
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case cCRNFmtDXN_XY:
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case cCRNFmtDXN_YX:
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case cCRNFmtDXT5_CCxY:
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case cCRNFmtDXT5_xGxR:
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case cCRNFmtDXT5_xGBR:
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case cCRNFmtDXT5_AGBR:
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case cCRNFmtETC2A:
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case cCRNFmtETC2AS:
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return 8;
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default:
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break;
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}
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CRND_ASSERT(false);
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return 0;
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}
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uint32 crnd_get_bytes_per_dxt_block(crn_format fmt) {
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return (crnd_get_crn_format_bits_per_texel(fmt) << 4) >> 3;
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}
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// TODO: tmp_header isn't used/This function is a helper to support old headers.
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const crn_header* crnd_get_header(const void* pData, uint32 data_size) {
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if ((!pData) || (data_size < sizeof(crn_header)))
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return NULL;
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const crn_header& file_header = *static_cast<const crn_header*>(pData);
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if (file_header.m_sig != crn_header::cCRNSigValue)
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return NULL;
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if ((file_header.m_header_size < sizeof(crn_header)) || (data_size < file_header.m_data_size))
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return NULL;
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return &file_header;
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}
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bool crnd_validate_file(const void* pData, uint32 data_size, crn_file_info* pFile_info) {
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if (pFile_info) {
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if (pFile_info->m_struct_size != sizeof(crn_file_info))
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return false;
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memset(&pFile_info->m_struct_size + 1, 0, sizeof(crn_file_info) - sizeof(pFile_info->m_struct_size));
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}
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if ((!pData) || (data_size < cCRNHeaderMinSize))
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return false;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return false;
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const uint32 header_crc = crc16(&pHeader->m_data_size, (uint32)(pHeader->m_header_size - ((const uint8*)&pHeader->m_data_size - (const uint8*)pHeader)));
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if (header_crc != pHeader->m_header_crc16)
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return false;
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const uint32 data_crc = crc16((const uint8*)pData + pHeader->m_header_size, pHeader->m_data_size - pHeader->m_header_size);
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if (data_crc != pHeader->m_data_crc16)
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return false;
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if ((pHeader->m_faces != 1) && (pHeader->m_faces != 6))
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return false;
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if ((pHeader->m_width < 1) || (pHeader->m_width > cCRNMaxLevelResolution))
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return false;
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if ((pHeader->m_height < 1) || (pHeader->m_height > cCRNMaxLevelResolution))
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return false;
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if ((pHeader->m_levels < 1) || (pHeader->m_levels > utils::compute_max_mips(pHeader->m_width, pHeader->m_height)))
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return false;
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if (((int)pHeader->m_format < cCRNFmtDXT1) || ((int)pHeader->m_format >= cCRNFmtTotal))
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return false;
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if (pFile_info) {
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pFile_info->m_actual_data_size = pHeader->m_data_size;
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pFile_info->m_header_size = pHeader->m_header_size;
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pFile_info->m_total_palette_size = pHeader->m_color_endpoints.m_size + pHeader->m_color_selectors.m_size + pHeader->m_alpha_endpoints.m_size + pHeader->m_alpha_selectors.m_size;
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pFile_info->m_tables_size = pHeader->m_tables_size;
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pFile_info->m_levels = pHeader->m_levels;
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for (uint32 i = 0; i < pHeader->m_levels; i++) {
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uint32 next_ofs = pHeader->m_data_size;
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// assumes the levels are packed together sequentially
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if ((i + 1) < pHeader->m_levels)
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next_ofs = pHeader->m_level_ofs[i + 1];
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pFile_info->m_level_compressed_size[i] = next_ofs - pHeader->m_level_ofs[i];
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}
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pFile_info->m_color_endpoint_palette_entries = pHeader->m_color_endpoints.m_num;
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pFile_info->m_color_selector_palette_entries = pHeader->m_color_selectors.m_num;
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;
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pFile_info->m_alpha_endpoint_palette_entries = pHeader->m_alpha_endpoints.m_num;
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;
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pFile_info->m_alpha_selector_palette_entries = pHeader->m_alpha_selectors.m_num;
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;
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}
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return true;
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}
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bool crnd_get_texture_info(const void* pData, uint32 data_size, crn_texture_info* pInfo) {
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if ((!pData) || (data_size < sizeof(crn_header)) || (!pInfo))
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return false;
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if (pInfo->m_struct_size != sizeof(crn_texture_info))
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return false;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return false;
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pInfo->m_width = pHeader->m_width;
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pInfo->m_height = pHeader->m_height;
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pInfo->m_levels = pHeader->m_levels;
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pInfo->m_faces = pHeader->m_faces;
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pInfo->m_format = static_cast<crn_format>((uint32)pHeader->m_format);
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pInfo->m_bytes_per_block = pHeader->m_format == cCRNFmtDXT1 || pHeader->m_format == cCRNFmtDXT5A || pHeader->m_format == cCRNFmtETC1 || pHeader->m_format == cCRNFmtETC2 || pHeader->m_format == cCRNFmtETC1S ? 8 : 16;
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pInfo->m_userdata0 = pHeader->m_userdata0;
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pInfo->m_userdata1 = pHeader->m_userdata1;
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return true;
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}
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bool crnd_get_level_info(const void* pData, uint32 data_size, uint32 level_index, crn_level_info* pLevel_info) {
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if ((!pData) || (data_size < cCRNHeaderMinSize) || (!pLevel_info))
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return false;
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if (pLevel_info->m_struct_size != sizeof(crn_level_info))
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return false;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return false;
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if (level_index >= pHeader->m_levels)
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return false;
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uint32 width = math::maximum<uint32>(1U, pHeader->m_width >> level_index);
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uint32 height = math::maximum<uint32>(1U, pHeader->m_height >> level_index);
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pLevel_info->m_width = width;
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pLevel_info->m_height = height;
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pLevel_info->m_faces = pHeader->m_faces;
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pLevel_info->m_blocks_x = (width + 3) >> 2;
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pLevel_info->m_blocks_y = (height + 3) >> 2;
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pLevel_info->m_bytes_per_block = ((pHeader->m_format == cCRNFmtDXT1) || (pHeader->m_format == cCRNFmtDXT5A)) ? 8 : 16;
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pLevel_info->m_format = static_cast<crn_format>((uint32)pHeader->m_format);
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return true;
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}
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const void* crnd_get_level_data(const void* pData, uint32 data_size, uint32 level_index, uint32* pSize) {
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if (pSize)
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*pSize = 0;
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if ((!pData) || (data_size < cCRNHeaderMinSize))
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return NULL;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return NULL;
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if (level_index >= pHeader->m_levels)
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return NULL;
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uint32 cur_level_ofs = pHeader->m_level_ofs[level_index];
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if (pSize) {
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uint32 next_level_ofs = data_size;
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if ((level_index + 1) < (pHeader->m_levels))
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next_level_ofs = pHeader->m_level_ofs[level_index + 1];
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*pSize = next_level_ofs - cur_level_ofs;
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}
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return static_cast<const uint8*>(pData) + cur_level_ofs;
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}
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uint32 crnd_get_segmented_file_size(const void* pData, uint32 data_size) {
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if ((!pData) || (data_size < cCRNHeaderMinSize))
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return false;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return false;
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uint32 size = pHeader->m_header_size;
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size = math::maximum(size, pHeader->m_color_endpoints.m_ofs + pHeader->m_color_endpoints.m_size);
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size = math::maximum(size, pHeader->m_color_selectors.m_ofs + pHeader->m_color_selectors.m_size);
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size = math::maximum(size, pHeader->m_alpha_endpoints.m_ofs + pHeader->m_alpha_endpoints.m_size);
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size = math::maximum(size, pHeader->m_alpha_selectors.m_ofs + pHeader->m_alpha_selectors.m_size);
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size = math::maximum(size, pHeader->m_tables_ofs + pHeader->m_tables_size);
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return size;
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}
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bool crnd_create_segmented_file(const void* pData, uint32 data_size, void* pBase_data, uint base_data_size) {
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if ((!pData) || (data_size < cCRNHeaderMinSize))
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return false;
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const crn_header* pHeader = crnd_get_header(pData, data_size);
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if (!pHeader)
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return false;
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if (pHeader->m_flags & cCRNHeaderFlagSegmented)
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return false;
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const uint actual_base_data_size = crnd_get_segmented_file_size(pData, data_size);
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if (base_data_size < actual_base_data_size)
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return false;
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memcpy(pBase_data, pData, actual_base_data_size);
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crn_header& new_header = *static_cast<crn_header*>(pBase_data);
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new_header.m_flags = new_header.m_flags | cCRNHeaderFlagSegmented;
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new_header.m_data_size = actual_base_data_size;
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new_header.m_data_crc16 = crc16((const uint8*)pBase_data + new_header.m_header_size, new_header.m_data_size - new_header.m_header_size);
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new_header.m_header_crc16 = crc16(&new_header.m_data_size, new_header.m_header_size - (uint32)((const uint8*)&new_header.m_data_size - (const uint8*)&new_header));
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CRND_ASSERT(crnd_validate_file(&new_header, actual_base_data_size, NULL));
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return true;
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}
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} // namespace unitycrnd
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// File: symbol_codec.cpp
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namespace unitycrnd {
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static_huffman_data_model::static_huffman_data_model()
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: m_total_syms(0),
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m_pDecode_tables(NULL) {
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}
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static_huffman_data_model::static_huffman_data_model(const static_huffman_data_model& other)
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: m_total_syms(0),
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m_pDecode_tables(NULL) {
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*this = other;
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}
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static_huffman_data_model::~static_huffman_data_model() {
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if (m_pDecode_tables)
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crnd_delete(m_pDecode_tables);
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}
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static_huffman_data_model& static_huffman_data_model::operator=(const static_huffman_data_model& rhs) {
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if (this == &rhs)
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return *this;
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m_total_syms = rhs.m_total_syms;
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m_code_sizes = rhs.m_code_sizes;
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if (m_code_sizes.get_alloc_failed()) {
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clear();
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return *this;
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}
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if (rhs.m_pDecode_tables) {
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if (m_pDecode_tables)
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*m_pDecode_tables = *rhs.m_pDecode_tables;
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else
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m_pDecode_tables = crnd_new<prefix_coding::decoder_tables>(*rhs.m_pDecode_tables);
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} else {
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crnd_delete(m_pDecode_tables);
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m_pDecode_tables = NULL;
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}
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return *this;
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}
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void static_huffman_data_model::clear() {
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m_total_syms = 0;
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m_code_sizes.clear();
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if (m_pDecode_tables) {
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crnd_delete(m_pDecode_tables);
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m_pDecode_tables = NULL;
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}
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}
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bool static_huffman_data_model::init(uint32 total_syms, const uint8* pCode_sizes, uint32 code_size_limit) {
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CRND_ASSERT((total_syms >= 1) && (total_syms <= prefix_coding::cMaxSupportedSyms) && (code_size_limit >= 1));
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code_size_limit = math::minimum(code_size_limit, prefix_coding::cMaxExpectedCodeSize);
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if (!m_code_sizes.resize(total_syms))
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return false;
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uint32 min_code_size = cUINT32_MAX;
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uint32 max_code_size = 0;
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for (uint32 i = 0; i < total_syms; i++) {
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uint32 s = pCode_sizes[i];
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m_code_sizes[i] = static_cast<uint8>(s);
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min_code_size = math::minimum(min_code_size, s);
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max_code_size = math::maximum(max_code_size, s);
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}
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if ((max_code_size < 1) || (max_code_size > 32) || (min_code_size > code_size_limit))
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return false;
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if (max_code_size > code_size_limit)
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return false;
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if (!m_pDecode_tables)
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m_pDecode_tables = crnd_new<prefix_coding::decoder_tables>();
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if (!m_pDecode_tables->init(m_total_syms, &m_code_sizes[0], compute_decoder_table_bits()))
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return false;
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return true;
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}
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bool static_huffman_data_model::prepare_decoder_tables() {
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uint32 total_syms = m_code_sizes.size();
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CRND_ASSERT((total_syms >= 1) && (total_syms <= prefix_coding::cMaxSupportedSyms));
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m_total_syms = total_syms;
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if (!m_pDecode_tables)
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m_pDecode_tables = crnd_new<prefix_coding::decoder_tables>();
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return m_pDecode_tables->init(m_total_syms, &m_code_sizes[0], compute_decoder_table_bits());
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}
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uint static_huffman_data_model::compute_decoder_table_bits() const {
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#if CRND_PREFIX_CODING_USE_FIXED_TABLE_SIZE
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return prefix_coding::cMaxTableBits;
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#else
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uint32 decoder_table_bits = 0;
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if (m_total_syms > 16)
|
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decoder_table_bits = static_cast<uint8>(math::minimum(1 + math::ceil_log2i(m_total_syms), prefix_coding::cMaxTableBits));
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return decoder_table_bits;
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#endif
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}
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|
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symbol_codec::symbol_codec()
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: m_pDecode_buf(NULL),
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m_pDecode_buf_next(NULL),
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m_pDecode_buf_end(NULL),
|
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m_decode_buf_size(0),
|
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m_bit_buf(0),
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m_bit_count(0) {
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}
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|
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// Code length encoding symbols:
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// 0-16 - actual code lengths
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const uint32 cMaxCodelengthCodes = 21;
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|
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const uint32 cSmallZeroRunCode = 17;
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const uint32 cLargeZeroRunCode = 18;
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const uint32 cSmallRepeatCode = 19;
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const uint32 cLargeRepeatCode = 20;
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const uint32 cMinSmallZeroRunSize = 3;
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const uint32 cMaxSmallZeroRunSize = 10;
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const uint32 cMinLargeZeroRunSize = 11;
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const uint32 cMaxLargeZeroRunSize = 138;
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|
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const uint32 cSmallMinNonZeroRunSize = 3;
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const uint32 cSmallMaxNonZeroRunSize = 6;
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const uint32 cLargeMinNonZeroRunSize = 7;
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const uint32 cLargeMaxNonZeroRunSize = 70;
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|
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const uint32 cSmallZeroRunExtraBits = 3;
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const uint32 cLargeZeroRunExtraBits = 7;
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const uint32 cSmallNonZeroRunExtraBits = 2;
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const uint32 cLargeNonZeroRunExtraBits = 6;
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|
|
static const uint8 g_most_probable_codelength_codes[] =
|
|
{
|
|
cSmallZeroRunCode, cLargeZeroRunCode,
|
|
cSmallRepeatCode, cLargeRepeatCode,
|
|
|
|
0, 8,
|
|
7, 9,
|
|
6, 10,
|
|
5, 11,
|
|
4, 12,
|
|
3, 13,
|
|
2, 14,
|
|
1, 15,
|
|
16};
|
|
const uint32 cNumMostProbableCodelengthCodes = sizeof(g_most_probable_codelength_codes) / sizeof(g_most_probable_codelength_codes[0]);
|
|
|
|
bool symbol_codec::decode_receive_static_data_model(static_huffman_data_model& model) {
|
|
const uint32 total_used_syms = decode_bits(math::total_bits(prefix_coding::cMaxSupportedSyms));
|
|
|
|
if (!total_used_syms) {
|
|
model.clear();
|
|
return true;
|
|
}
|
|
|
|
if (!model.m_code_sizes.resize(total_used_syms))
|
|
return false;
|
|
|
|
memset(&model.m_code_sizes[0], 0, sizeof(model.m_code_sizes[0]) * total_used_syms);
|
|
|
|
const uint32 num_codelength_codes_to_send = decode_bits(5);
|
|
if ((num_codelength_codes_to_send < 1) || (num_codelength_codes_to_send > cMaxCodelengthCodes))
|
|
return false;
|
|
|
|
static_huffman_data_model dm;
|
|
if (!dm.m_code_sizes.resize(cMaxCodelengthCodes))
|
|
return false;
|
|
|
|
for (uint32 i = 0; i < num_codelength_codes_to_send; i++)
|
|
dm.m_code_sizes[g_most_probable_codelength_codes[i]] = static_cast<uint8>(decode_bits(3));
|
|
|
|
if (!dm.prepare_decoder_tables())
|
|
return false;
|
|
|
|
uint32 ofs = 0;
|
|
while (ofs < total_used_syms) {
|
|
const uint32 num_remaining = total_used_syms - ofs;
|
|
|
|
uint32 code = decode(dm);
|
|
if (code <= 16)
|
|
model.m_code_sizes[ofs++] = static_cast<uint8>(code);
|
|
else if (code == cSmallZeroRunCode) {
|
|
uint32 len = decode_bits(cSmallZeroRunExtraBits) + cMinSmallZeroRunSize;
|
|
if (len > num_remaining)
|
|
return false;
|
|
ofs += len;
|
|
} else if (code == cLargeZeroRunCode) {
|
|
uint32 len = decode_bits(cLargeZeroRunExtraBits) + cMinLargeZeroRunSize;
|
|
if (len > num_remaining)
|
|
return false;
|
|
ofs += len;
|
|
} else if ((code == cSmallRepeatCode) || (code == cLargeRepeatCode)) {
|
|
uint32 len;
|
|
if (code == cSmallRepeatCode)
|
|
len = decode_bits(cSmallNonZeroRunExtraBits) + cSmallMinNonZeroRunSize;
|
|
else
|
|
len = decode_bits(cLargeNonZeroRunExtraBits) + cLargeMinNonZeroRunSize;
|
|
|
|
if ((!ofs) || (len > num_remaining))
|
|
return false;
|
|
const uint32 prev = model.m_code_sizes[ofs - 1];
|
|
if (!prev)
|
|
return false;
|
|
const uint32 end = ofs + len;
|
|
while (ofs < end)
|
|
model.m_code_sizes[ofs++] = static_cast<uint8>(prev);
|
|
} else {
|
|
CRND_ASSERT(0);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (ofs != total_used_syms)
|
|
return false;
|
|
|
|
return model.prepare_decoder_tables();
|
|
}
|
|
|
|
bool symbol_codec::start_decoding(const uint8* pBuf, uint32 buf_size) {
|
|
if (!buf_size)
|
|
return false;
|
|
|
|
m_pDecode_buf = pBuf;
|
|
m_pDecode_buf_next = pBuf;
|
|
m_decode_buf_size = buf_size;
|
|
m_pDecode_buf_end = pBuf + buf_size;
|
|
|
|
get_bits_init();
|
|
|
|
return true;
|
|
}
|
|
|
|
void symbol_codec::get_bits_init() {
|
|
m_bit_buf = 0;
|
|
m_bit_count = 0;
|
|
}
|
|
|
|
uint32 symbol_codec::decode_bits(uint32 num_bits) {
|
|
if (!num_bits)
|
|
return 0;
|
|
|
|
if (num_bits > 16) {
|
|
uint32 a = get_bits(num_bits - 16);
|
|
uint32 b = get_bits(16);
|
|
|
|
return (a << 16) | b;
|
|
} else
|
|
return get_bits(num_bits);
|
|
}
|
|
|
|
uint32 symbol_codec::get_bits(uint32 num_bits) {
|
|
CRND_ASSERT(num_bits <= 32U);
|
|
|
|
while (m_bit_count < (int)num_bits) {
|
|
bit_buf_type c = 0;
|
|
if (m_pDecode_buf_next != m_pDecode_buf_end)
|
|
c = *m_pDecode_buf_next++;
|
|
|
|
m_bit_count += 8;
|
|
CRND_ASSERT(m_bit_count <= cBitBufSize);
|
|
|
|
m_bit_buf |= (c << (cBitBufSize - m_bit_count));
|
|
}
|
|
|
|
uint32 result = static_cast<uint32>(m_bit_buf >> (cBitBufSize - num_bits));
|
|
|
|
m_bit_buf <<= num_bits;
|
|
m_bit_count -= num_bits;
|
|
|
|
return result;
|
|
}
|
|
|
|
uint32 symbol_codec::decode(const static_huffman_data_model& model) {
|
|
const prefix_coding::decoder_tables* pTables = model.m_pDecode_tables;
|
|
|
|
if (m_bit_count < 24) {
|
|
if (m_bit_count < 16) {
|
|
uint32 c0 = 0, c1 = 0;
|
|
const uint8* p = m_pDecode_buf_next;
|
|
if (p < m_pDecode_buf_end)
|
|
c0 = *p++;
|
|
if (p < m_pDecode_buf_end)
|
|
c1 = *p++;
|
|
m_pDecode_buf_next = p;
|
|
m_bit_count += 16;
|
|
uint32 c = (c0 << 8) | c1;
|
|
m_bit_buf |= (c << (32 - m_bit_count));
|
|
} else {
|
|
uint32 c = (m_pDecode_buf_next < m_pDecode_buf_end) ? *m_pDecode_buf_next++ : 0;
|
|
m_bit_count += 8;
|
|
m_bit_buf |= (c << (32 - m_bit_count));
|
|
}
|
|
}
|
|
|
|
uint32 k = (m_bit_buf >> 16) + 1;
|
|
uint32 sym, len;
|
|
|
|
if (k <= pTables->m_table_max_code) {
|
|
uint32 t = pTables->m_lookup[m_bit_buf >> (32 - pTables->m_table_bits)];
|
|
|
|
CRND_ASSERT(t != cUINT32_MAX);
|
|
sym = t & cUINT16_MAX;
|
|
len = t >> 16;
|
|
|
|
CRND_ASSERT(model.m_code_sizes[sym] == len);
|
|
} else {
|
|
len = pTables->m_decode_start_code_size;
|
|
|
|
for (;;) {
|
|
if (k <= pTables->m_max_codes[len - 1])
|
|
break;
|
|
len++;
|
|
}
|
|
|
|
int val_ptr = pTables->m_val_ptrs[len - 1] + (m_bit_buf >> (32 - len));
|
|
|
|
if (((uint32)val_ptr >= model.m_total_syms)) {
|
|
// corrupted stream, or a bug
|
|
CRND_ASSERT(0);
|
|
return 0;
|
|
}
|
|
|
|
sym = pTables->m_sorted_symbol_order[val_ptr];
|
|
}
|
|
|
|
m_bit_buf <<= len;
|
|
m_bit_count -= len;
|
|
|
|
return sym;
|
|
}
|
|
|
|
uint64 symbol_codec::stop_decoding() {
|
|
return static_cast<uint64>(m_pDecode_buf_next - m_pDecode_buf);
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_dxt.cpp
|
|
namespace unitycrnd {
|
|
const uint8 g_dxt1_to_linear[cDXT1SelectorValues] = {0U, 3U, 1U, 2U};
|
|
const uint8 g_dxt1_from_linear[cDXT1SelectorValues] = {0U, 2U, 3U, 1U};
|
|
const uint8 g_etc1_from_linear[cDXT1SelectorValues] = {3U, 2U, 0U, 1U};
|
|
|
|
const uint8 g_dxt5_to_linear[cDXT5SelectorValues] = {0U, 7U, 1U, 2U, 3U, 4U, 5U, 6U};
|
|
const uint8 g_dxt5_from_linear[cDXT5SelectorValues] = {0U, 2U, 3U, 4U, 5U, 6U, 7U, 1U};
|
|
|
|
const uint8 g_six_alpha_invert_table[cDXT5SelectorValues] = {1, 0, 5, 4, 3, 2, 6, 7};
|
|
const uint8 g_eight_alpha_invert_table[cDXT5SelectorValues] = {1, 0, 7, 6, 5, 4, 3, 2};
|
|
|
|
uint16 dxt1_block::pack_color(const color_quad_u8& color, bool scaled, uint32 bias) {
|
|
uint32 r = color.r;
|
|
uint32 g = color.g;
|
|
uint32 b = color.b;
|
|
|
|
if (scaled) {
|
|
r = (r * 31U + bias) / 255U;
|
|
g = (g * 63U + bias) / 255U;
|
|
b = (b * 31U + bias) / 255U;
|
|
}
|
|
|
|
r = math::minimum(r, 31U);
|
|
g = math::minimum(g, 63U);
|
|
b = math::minimum(b, 31U);
|
|
|
|
return static_cast<uint16>(b | (g << 5U) | (r << 11U));
|
|
}
|
|
|
|
uint16 dxt1_block::pack_color(uint32 r, uint32 g, uint32 b, bool scaled, uint32 bias) {
|
|
return pack_color(color_quad_u8(r, g, b, 0), scaled, bias);
|
|
}
|
|
|
|
color_quad_u8 dxt1_block::unpack_color(uint16 packed_color, bool scaled, uint32 alpha) {
|
|
uint32 b = packed_color & 31U;
|
|
uint32 g = (packed_color >> 5U) & 63U;
|
|
uint32 r = (packed_color >> 11U) & 31U;
|
|
|
|
if (scaled) {
|
|
b = (b << 3U) | (b >> 2U);
|
|
g = (g << 2U) | (g >> 4U);
|
|
r = (r << 3U) | (r >> 2U);
|
|
}
|
|
|
|
return color_quad_u8(r, g, b, alpha);
|
|
}
|
|
|
|
void dxt1_block::unpack_color(uint32& r, uint32& g, uint32& b, uint16 packed_color, bool scaled) {
|
|
color_quad_u8 c(unpack_color(packed_color, scaled, 0));
|
|
r = c.r;
|
|
g = c.g;
|
|
b = c.b;
|
|
}
|
|
|
|
uint32 dxt1_block::get_block_colors3(color_quad_u8* pDst, uint16 color0, uint16 color1) {
|
|
color_quad_u8 c0(unpack_color(color0, true));
|
|
color_quad_u8 c1(unpack_color(color1, true));
|
|
|
|
pDst[0] = c0;
|
|
pDst[1] = c1;
|
|
pDst[2].set((c0.r + c1.r) >> 1U, (c0.g + c1.g) >> 1U, (c0.b + c1.b) >> 1U, 255U);
|
|
pDst[3].set(0, 0, 0, 0);
|
|
|
|
return 3;
|
|
}
|
|
|
|
uint32 dxt1_block::get_block_colors4(color_quad_u8* pDst, uint16 color0, uint16 color1) {
|
|
color_quad_u8 c0(unpack_color(color0, true));
|
|
color_quad_u8 c1(unpack_color(color1, true));
|
|
|
|
pDst[0] = c0;
|
|
pDst[1] = c1;
|
|
|
|
// 12/14/09 - Supposed to round according to DX docs, but this conflicts with the OpenGL S3TC spec. ?
|
|
// Turns out some GPU's round and some don't. Great.
|
|
//pDst[2].set( (c0.r * 2 + c1.r + 1) / 3, (c0.g * 2 + c1.g + 1) / 3, (c0.b * 2 + c1.b + 1) / 3, 255U);
|
|
//pDst[3].set( (c1.r * 2 + c0.r + 1) / 3, (c1.g * 2 + c0.g + 1) / 3, (c1.b * 2 + c0.b + 1) / 3, 255U);
|
|
|
|
pDst[2].set((c0.r * 2 + c1.r) / 3, (c0.g * 2 + c1.g) / 3, (c0.b * 2 + c1.b) / 3, 255U);
|
|
pDst[3].set((c1.r * 2 + c0.r) / 3, (c1.g * 2 + c0.g) / 3, (c1.b * 2 + c0.b) / 3, 255U);
|
|
|
|
return 4;
|
|
}
|
|
|
|
uint32 dxt1_block::get_block_colors(color_quad_u8* pDst, uint16 color0, uint16 color1) {
|
|
if (color0 > color1)
|
|
return get_block_colors4(pDst, color0, color1);
|
|
else
|
|
return get_block_colors3(pDst, color0, color1);
|
|
}
|
|
|
|
color_quad_u8 dxt1_block::unpack_endpoint(uint32 endpoints, uint32 index, bool scaled, uint32 alpha) {
|
|
CRND_ASSERT(index < 2);
|
|
return unpack_color(static_cast<uint16>((endpoints >> (index * 16U)) & 0xFFFFU), scaled, alpha);
|
|
}
|
|
|
|
uint32 dxt1_block::pack_endpoints(uint32 lo, uint32 hi) {
|
|
CRND_ASSERT((lo <= 0xFFFFU) && (hi <= 0xFFFFU));
|
|
return lo | (hi << 16U);
|
|
}
|
|
|
|
void dxt3_block::set_alpha(uint32 x, uint32 y, uint32 value, bool scaled) {
|
|
CRND_ASSERT((x < cDXTBlockSize) && (y < cDXTBlockSize));
|
|
|
|
if (scaled) {
|
|
CRND_ASSERT(value <= 0xFF);
|
|
value = (value * 15U + 128U) / 255U;
|
|
} else {
|
|
CRND_ASSERT(value <= 0xF);
|
|
}
|
|
|
|
uint32 ofs = (y << 1U) + (x >> 1U);
|
|
uint32 c = m_alpha[ofs];
|
|
|
|
c &= ~(0xF << ((x & 1U) << 2U));
|
|
c |= (value << ((x & 1U) << 2U));
|
|
|
|
m_alpha[ofs] = static_cast<uint8>(c);
|
|
}
|
|
|
|
uint32 dxt3_block::get_alpha(uint32 x, uint32 y, bool scaled) const {
|
|
CRND_ASSERT((x < cDXTBlockSize) && (y < cDXTBlockSize));
|
|
|
|
uint32 value = m_alpha[(y << 1U) + (x >> 1U)];
|
|
if (x & 1)
|
|
value >>= 4;
|
|
value &= 0xF;
|
|
|
|
if (scaled)
|
|
value = (value << 4U) | value;
|
|
|
|
return value;
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values6(color_quad_u8* pDst, uint32 l, uint32 h) {
|
|
pDst[0].a = static_cast<uint8>(l);
|
|
pDst[1].a = static_cast<uint8>(h);
|
|
pDst[2].a = static_cast<uint8>((l * 4 + h) / 5);
|
|
pDst[3].a = static_cast<uint8>((l * 3 + h * 2) / 5);
|
|
pDst[4].a = static_cast<uint8>((l * 2 + h * 3) / 5);
|
|
pDst[5].a = static_cast<uint8>((l + h * 4) / 5);
|
|
pDst[6].a = 0;
|
|
pDst[7].a = 255;
|
|
return 6;
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values8(color_quad_u8* pDst, uint32 l, uint32 h) {
|
|
pDst[0].a = static_cast<uint8>(l);
|
|
pDst[1].a = static_cast<uint8>(h);
|
|
pDst[2].a = static_cast<uint8>((l * 6 + h) / 7);
|
|
pDst[3].a = static_cast<uint8>((l * 5 + h * 2) / 7);
|
|
pDst[4].a = static_cast<uint8>((l * 4 + h * 3) / 7);
|
|
pDst[5].a = static_cast<uint8>((l * 3 + h * 4) / 7);
|
|
pDst[6].a = static_cast<uint8>((l * 2 + h * 5) / 7);
|
|
pDst[7].a = static_cast<uint8>((l + h * 6) / 7);
|
|
return 8;
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values(color_quad_u8* pDst, uint32 l, uint32 h) {
|
|
if (l > h)
|
|
return get_block_values8(pDst, l, h);
|
|
else
|
|
return get_block_values6(pDst, l, h);
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values6(uint32* pDst, uint32 l, uint32 h) {
|
|
pDst[0] = l;
|
|
pDst[1] = h;
|
|
pDst[2] = (l * 4 + h) / 5;
|
|
pDst[3] = (l * 3 + h * 2) / 5;
|
|
pDst[4] = (l * 2 + h * 3) / 5;
|
|
pDst[5] = (l + h * 4) / 5;
|
|
pDst[6] = 0;
|
|
pDst[7] = 255;
|
|
return 6;
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values8(uint32* pDst, uint32 l, uint32 h) {
|
|
pDst[0] = l;
|
|
pDst[1] = h;
|
|
pDst[2] = (l * 6 + h) / 7;
|
|
pDst[3] = (l * 5 + h * 2) / 7;
|
|
pDst[4] = (l * 4 + h * 3) / 7;
|
|
pDst[5] = (l * 3 + h * 4) / 7;
|
|
pDst[6] = (l * 2 + h * 5) / 7;
|
|
pDst[7] = (l + h * 6) / 7;
|
|
return 8;
|
|
}
|
|
|
|
uint32 dxt5_block::unpack_endpoint(uint32 packed, uint32 index) {
|
|
CRND_ASSERT(index < 2);
|
|
return (packed >> (8 * index)) & 0xFF;
|
|
}
|
|
|
|
uint32 dxt5_block::pack_endpoints(uint32 lo, uint32 hi) {
|
|
CRND_ASSERT((lo <= 0xFF) && (hi <= 0xFF));
|
|
return lo | (hi << 8U);
|
|
}
|
|
|
|
uint32 dxt5_block::get_block_values(uint32* pDst, uint32 l, uint32 h) {
|
|
if (l > h)
|
|
return get_block_values8(pDst, l, h);
|
|
else
|
|
return get_block_values6(pDst, l, h);
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
// File: crnd_decode.cpp
|
|
|
|
namespace unitycrnd {
|
|
|
|
class crn_unpacker {
|
|
public:
|
|
inline crn_unpacker()
|
|
: m_magic(cMagicValue),
|
|
m_pData(NULL),
|
|
m_data_size(0),
|
|
m_pHeader(NULL) {
|
|
}
|
|
|
|
inline ~crn_unpacker() {
|
|
m_magic = 0;
|
|
}
|
|
|
|
inline bool is_valid() const { return m_magic == cMagicValue; }
|
|
|
|
bool init(const void* pData, uint32 data_size) {
|
|
m_pHeader = crnd_get_header(pData, data_size);
|
|
if (!m_pHeader)
|
|
return false;
|
|
|
|
m_pData = static_cast<const uint8*>(pData);
|
|
m_data_size = data_size;
|
|
|
|
if (!init_tables())
|
|
return false;
|
|
|
|
if (!decode_palettes())
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool unpack_level(
|
|
void** pDst, uint32 dst_size_in_bytes, uint32 row_pitch_in_bytes,
|
|
uint32 level_index) {
|
|
uint32 cur_level_ofs = m_pHeader->m_level_ofs[level_index];
|
|
|
|
uint32 next_level_ofs = m_data_size;
|
|
if ((level_index + 1) < (m_pHeader->m_levels))
|
|
next_level_ofs = m_pHeader->m_level_ofs[level_index + 1];
|
|
|
|
CRND_ASSERT(next_level_ofs > cur_level_ofs);
|
|
|
|
return unpack_level(m_pData + cur_level_ofs, next_level_ofs - cur_level_ofs, pDst, dst_size_in_bytes, row_pitch_in_bytes, level_index);
|
|
}
|
|
|
|
bool unpack_level(
|
|
const void* pSrc, uint32 src_size_in_bytes,
|
|
void** pDst, uint32 dst_size_in_bytes, uint32 row_pitch_in_bytes,
|
|
uint32 level_index) {
|
|
|
|
#ifdef CRND_BUILD_DEBUG
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++)
|
|
if (!pDst[f])
|
|
return false;
|
|
#endif
|
|
|
|
const uint32 width = math::maximum(m_pHeader->m_width >> level_index, 1U);
|
|
const uint32 height = math::maximum(m_pHeader->m_height >> level_index, 1U);
|
|
const uint32 blocks_x = (width + 3U) >> 2U;
|
|
const uint32 blocks_y = (height + 3U) >> 2U;
|
|
const uint32 block_size = m_pHeader->m_format == cCRNFmtDXT1 || m_pHeader->m_format == cCRNFmtDXT5A || m_pHeader->m_format == cCRNFmtETC1 || m_pHeader->m_format == cCRNFmtETC2 || m_pHeader->m_format == cCRNFmtETC1S ? 8 : 16;
|
|
|
|
uint32 minimal_row_pitch = block_size * blocks_x;
|
|
if (!row_pitch_in_bytes)
|
|
row_pitch_in_bytes = minimal_row_pitch;
|
|
else if ((row_pitch_in_bytes < minimal_row_pitch) || (row_pitch_in_bytes & 3))
|
|
return false;
|
|
if (dst_size_in_bytes < row_pitch_in_bytes * blocks_y)
|
|
return false;
|
|
|
|
if (!m_codec.start_decoding(static_cast<const unitycrnd::uint8*>(pSrc), src_size_in_bytes))
|
|
return false;
|
|
|
|
bool status = false;
|
|
switch (m_pHeader->m_format) {
|
|
case cCRNFmtDXT1:
|
|
case cCRNFmtETC1S:
|
|
status = unpack_dxt1((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtDXT5:
|
|
case cCRNFmtDXT5_CCxY:
|
|
case cCRNFmtDXT5_xGBR:
|
|
case cCRNFmtDXT5_AGBR:
|
|
case cCRNFmtDXT5_xGxR:
|
|
case cCRNFmtETC2AS:
|
|
status = unpack_dxt5((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtDXT5A:
|
|
status = unpack_dxt5a((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtDXN_XY:
|
|
case cCRNFmtDXN_YX:
|
|
status = unpack_dxn((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtETC1:
|
|
status = unpack_etc1((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtETC2:
|
|
status = unpack_etc1((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
case cCRNFmtETC2A:
|
|
status = unpack_etc2a((uint8**)pDst, row_pitch_in_bytes, blocks_x, blocks_y);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
if (!status)
|
|
return false;
|
|
|
|
m_codec.stop_decoding();
|
|
return true;
|
|
}
|
|
|
|
inline const void* get_data() const { return m_pData; }
|
|
inline uint32 get_data_size() const { return m_data_size; }
|
|
|
|
private:
|
|
enum { cMagicValue = 0x1EF9CABD };
|
|
uint32 m_magic;
|
|
|
|
const uint8* m_pData;
|
|
uint32 m_data_size;
|
|
const crn_header* m_pHeader;
|
|
|
|
symbol_codec m_codec;
|
|
|
|
static_huffman_data_model m_reference_encoding_dm;
|
|
static_huffman_data_model m_endpoint_delta_dm[2];
|
|
static_huffman_data_model m_selector_delta_dm[2];
|
|
|
|
unitycrnd::vector<uint32> m_color_endpoints;
|
|
unitycrnd::vector<uint32> m_color_selectors;
|
|
|
|
unitycrnd::vector<uint16> m_alpha_endpoints;
|
|
unitycrnd::vector<uint16> m_alpha_selectors;
|
|
|
|
struct block_buffer_element {
|
|
uint16 endpoint_reference;
|
|
uint16 color_endpoint_index;
|
|
uint16 alpha0_endpoint_index;
|
|
uint16 alpha1_endpoint_index;
|
|
};
|
|
unitycrnd::vector<block_buffer_element> m_block_buffer;
|
|
|
|
bool init_tables() {
|
|
if (!m_codec.start_decoding(m_pData + m_pHeader->m_tables_ofs, m_pHeader->m_tables_size))
|
|
return false;
|
|
|
|
if (!m_codec.decode_receive_static_data_model(m_reference_encoding_dm))
|
|
return false;
|
|
|
|
if ((!m_pHeader->m_color_endpoints.m_num) && (!m_pHeader->m_alpha_endpoints.m_num))
|
|
return false;
|
|
|
|
if (m_pHeader->m_color_endpoints.m_num) {
|
|
if (!m_codec.decode_receive_static_data_model(m_endpoint_delta_dm[0]))
|
|
return false;
|
|
if (!m_codec.decode_receive_static_data_model(m_selector_delta_dm[0]))
|
|
return false;
|
|
}
|
|
|
|
if (m_pHeader->m_alpha_endpoints.m_num) {
|
|
if (!m_codec.decode_receive_static_data_model(m_endpoint_delta_dm[1]))
|
|
return false;
|
|
if (!m_codec.decode_receive_static_data_model(m_selector_delta_dm[1]))
|
|
return false;
|
|
}
|
|
|
|
m_codec.stop_decoding();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool decode_palettes() {
|
|
if (m_pHeader->m_color_endpoints.m_num) {
|
|
if (!decode_color_endpoints())
|
|
return false;
|
|
if (!decode_color_selectors())
|
|
return false;
|
|
}
|
|
|
|
if (m_pHeader->m_alpha_endpoints.m_num) {
|
|
if (!decode_alpha_endpoints())
|
|
return false;
|
|
if (!(m_pHeader->m_format == cCRNFmtETC2AS ? decode_alpha_selectors_etcs() : m_pHeader->m_format == cCRNFmtETC2A ? decode_alpha_selectors_etc() : decode_alpha_selectors()))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool decode_color_endpoints() {
|
|
const uint32 num_color_endpoints = m_pHeader->m_color_endpoints.m_num;
|
|
const bool has_etc_color_blocks = m_pHeader->m_format == cCRNFmtETC1 || m_pHeader->m_format == cCRNFmtETC2 || m_pHeader->m_format == cCRNFmtETC2A || m_pHeader->m_format == cCRNFmtETC1S || m_pHeader->m_format == cCRNFmtETC2AS;
|
|
const bool has_subblocks = m_pHeader->m_format == cCRNFmtETC1 || m_pHeader->m_format == cCRNFmtETC2 || m_pHeader->m_format == cCRNFmtETC2A;
|
|
|
|
if (!m_color_endpoints.resize(num_color_endpoints))
|
|
return false;
|
|
|
|
if (!m_codec.start_decoding(m_pData + m_pHeader->m_color_endpoints.m_ofs, m_pHeader->m_color_endpoints.m_size))
|
|
return false;
|
|
|
|
static_huffman_data_model dm[2];
|
|
for (uint32 i = 0; i < (has_etc_color_blocks ? 1 : 2); i++)
|
|
if (!m_codec.decode_receive_static_data_model(dm[i]))
|
|
return false;
|
|
|
|
uint32 a = 0, b = 0, c = 0;
|
|
uint32 d = 0, e = 0, f = 0;
|
|
|
|
uint32* CRND_RESTRICT pDst = &m_color_endpoints[0];
|
|
|
|
for (uint32 i = 0; i < num_color_endpoints; i++) {
|
|
if (has_etc_color_blocks) {
|
|
for (b = 0; b < 32; b += 8)
|
|
a += m_codec.decode(dm[0]) << b;
|
|
a &= 0x1F1F1F1F;
|
|
*pDst++ = has_subblocks ? a : (a & 0x07000000) << 5 | (a & 0x07000000) << 2 | 0x02000000 | (a & 0x001F1F1F) << 3;
|
|
} else {
|
|
a = (a + m_codec.decode(dm[0])) & 31;
|
|
b = (b + m_codec.decode(dm[1])) & 63;
|
|
c = (c + m_codec.decode(dm[0])) & 31;
|
|
d = (d + m_codec.decode(dm[0])) & 31;
|
|
e = (e + m_codec.decode(dm[1])) & 63;
|
|
f = (f + m_codec.decode(dm[0])) & 31;
|
|
*pDst++ = c | (b << 5U) | (a << 11U) | (f << 16U) | (e << 21U) | (d << 27U);
|
|
}
|
|
}
|
|
|
|
m_codec.stop_decoding();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool decode_color_selectors() {
|
|
const bool has_etc_color_blocks = m_pHeader->m_format == cCRNFmtETC1 || m_pHeader->m_format == cCRNFmtETC2 || m_pHeader->m_format == cCRNFmtETC2A || m_pHeader->m_format == cCRNFmtETC1S || m_pHeader->m_format == cCRNFmtETC2AS;
|
|
const bool has_subblocks = m_pHeader->m_format == cCRNFmtETC1 || m_pHeader->m_format == cCRNFmtETC2 || m_pHeader->m_format == cCRNFmtETC2A;
|
|
m_codec.start_decoding(m_pData + m_pHeader->m_color_selectors.m_ofs, m_pHeader->m_color_selectors.m_size);
|
|
static_huffman_data_model dm;
|
|
m_codec.decode_receive_static_data_model(dm);
|
|
m_color_selectors.resize(m_pHeader->m_color_selectors.m_num << (has_subblocks ? 1 : 0));
|
|
for (uint32 s = 0, i = 0; i < m_pHeader->m_color_selectors.m_num; i++) {
|
|
for (uint32 j = 0; j < 32; j += 4)
|
|
s ^= m_codec.decode(dm) << j;
|
|
if (has_etc_color_blocks) {
|
|
for (uint32 selector = (~s & 0xAAAAAAAA) | (~(s ^ s >> 1) & 0x55555555), t = 8, h = 0; h < 4; h++, t -= 15) {
|
|
for (uint32 w = 0; w < 4; w++, t += 4) {
|
|
if (has_subblocks) {
|
|
uint32 s0 = selector >> (w << 3 | h << 1);
|
|
m_color_selectors[i << 1] |= ((s0 >> 1 & 1) | (s0 & 1) << 16) << (t & 15);
|
|
}
|
|
uint32 s1 = selector >> (h << 3 | w << 1);
|
|
m_color_selectors[has_subblocks ? i << 1 | 1 : i] |= ((s1 >> 1 & 1) | (s1 & 1) << 16) << (t & 15);
|
|
}
|
|
}
|
|
} else {
|
|
m_color_selectors[i] = ((s ^ s << 1) & 0xAAAAAAAA) | (s >> 1 & 0x55555555);
|
|
}
|
|
}
|
|
m_codec.stop_decoding();
|
|
return true;
|
|
}
|
|
|
|
bool decode_alpha_endpoints() {
|
|
const uint32 num_alpha_endpoints = m_pHeader->m_alpha_endpoints.m_num;
|
|
|
|
if (!m_codec.start_decoding(m_pData + m_pHeader->m_alpha_endpoints.m_ofs, m_pHeader->m_alpha_endpoints.m_size))
|
|
return false;
|
|
|
|
static_huffman_data_model dm;
|
|
if (!m_codec.decode_receive_static_data_model(dm))
|
|
return false;
|
|
|
|
if (!m_alpha_endpoints.resize(num_alpha_endpoints))
|
|
return false;
|
|
|
|
uint16* CRND_RESTRICT pDst = &m_alpha_endpoints[0];
|
|
uint32 a = 0, b = 0;
|
|
|
|
for (uint32 i = 0; i < num_alpha_endpoints; i++) {
|
|
a = (a + m_codec.decode(dm)) & 255;
|
|
b = (b + m_codec.decode(dm)) & 255;
|
|
*pDst++ = (uint16)(a | (b << 8));
|
|
}
|
|
|
|
m_codec.stop_decoding();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool decode_alpha_selectors() {
|
|
m_codec.start_decoding(m_pData + m_pHeader->m_alpha_selectors.m_ofs, m_pHeader->m_alpha_selectors.m_size);
|
|
static_huffman_data_model dm;
|
|
m_codec.decode_receive_static_data_model(dm);
|
|
m_alpha_selectors.resize(m_pHeader->m_alpha_selectors.m_num * 3);
|
|
uint8 dxt5_from_linear[64];
|
|
for (uint32 i = 0; i < 64; i++)
|
|
dxt5_from_linear[i] = g_dxt5_from_linear[i & 7] | g_dxt5_from_linear[i >> 3] << 3;
|
|
for (uint32 s0_linear = 0, s1_linear = 0, i = 0; i < m_alpha_selectors.size();) {
|
|
uint32 s0 = 0, s1 = 0;
|
|
for (uint32 j = 0; j < 24; s0 |= dxt5_from_linear[s0_linear >> j & 0x3F] << j, j += 6)
|
|
s0_linear ^= m_codec.decode(dm) << j;
|
|
for (uint32 j = 0; j < 24; s1 |= dxt5_from_linear[s1_linear >> j & 0x3F] << j, j += 6)
|
|
s1_linear ^= m_codec.decode(dm) << j;
|
|
m_alpha_selectors[i++] = s0;
|
|
m_alpha_selectors[i++] = s0 >> 16 | s1 << 8;
|
|
m_alpha_selectors[i++] = s1 >> 8;
|
|
}
|
|
m_codec.stop_decoding();
|
|
return true;
|
|
}
|
|
|
|
bool decode_alpha_selectors_etc() {
|
|
m_codec.start_decoding(m_pData + m_pHeader->m_alpha_selectors.m_ofs, m_pHeader->m_alpha_selectors.m_size);
|
|
static_huffman_data_model dm;
|
|
m_codec.decode_receive_static_data_model(dm);
|
|
m_alpha_selectors.resize(m_pHeader->m_alpha_selectors.m_num * 6);
|
|
uint8 s_linear[8] = {};
|
|
uint8* data = (uint8*)m_alpha_selectors.begin();
|
|
for (uint i = 0; i < m_alpha_selectors.size(); i += 6, data += 12) {
|
|
for (uint s_group = 0, p = 0; p < 16; p++) {
|
|
s_group = p & 1 ? s_group >> 3 : s_linear[p >> 1] ^= m_codec.decode(dm);
|
|
uint8 s = s_group & 7;
|
|
if (s <= 3)
|
|
s = 3 - s;
|
|
uint8 d = 3 * (p + 1);
|
|
uint8 byte_offset = d >> 3;
|
|
uint8 bit_offset = d & 7;
|
|
data[byte_offset] |= s << (8 - bit_offset);
|
|
if (bit_offset < 3)
|
|
data[byte_offset - 1] |= s >> bit_offset;
|
|
d += 9 * ((p & 3) - (p >> 2));
|
|
byte_offset = d >> 3;
|
|
bit_offset = d & 7;
|
|
data[byte_offset + 6] |= s << (8 - bit_offset);
|
|
if (bit_offset < 3)
|
|
data[byte_offset + 5] |= s >> bit_offset;
|
|
}
|
|
}
|
|
m_codec.stop_decoding();
|
|
return true;
|
|
}
|
|
|
|
bool decode_alpha_selectors_etcs() {
|
|
m_codec.start_decoding(m_pData + m_pHeader->m_alpha_selectors.m_ofs, m_pHeader->m_alpha_selectors.m_size);
|
|
static_huffman_data_model dm;
|
|
m_codec.decode_receive_static_data_model(dm);
|
|
m_alpha_selectors.resize(m_pHeader->m_alpha_selectors.m_num * 3);
|
|
uint8 s_linear[8] = {};
|
|
uint8* data = (uint8*)m_alpha_selectors.begin();
|
|
for (uint i = 0; i < (m_alpha_selectors.size() << 1); i += 6) {
|
|
for (uint s_group = 0, p = 0; p < 16; p++) {
|
|
s_group = p & 1 ? s_group >> 3 : s_linear[p >> 1] ^= m_codec.decode(dm);
|
|
uint8 s = s_group & 7;
|
|
if (s <= 3)
|
|
s = 3 - s;
|
|
uint8 d = 3 * (p + 1) + 9 * ((p & 3) - (p >> 2));
|
|
uint8 byte_offset = d >> 3;
|
|
uint8 bit_offset = d & 7;
|
|
data[i + byte_offset] |= s << (8 - bit_offset);
|
|
if (bit_offset < 3)
|
|
data[i + byte_offset - 1] |= s >> bit_offset;
|
|
}
|
|
}
|
|
m_codec.stop_decoding();
|
|
return true;
|
|
}
|
|
|
|
static inline uint32 tiled_offset_2d_outer(uint32 y, uint32 AlignedWidth, uint32 LogBpp) {
|
|
uint32 Macro = ((y >> 5) * (AlignedWidth >> 5)) << (LogBpp + 7);
|
|
uint32 Micro = ((y & 6) << 2) << LogBpp;
|
|
|
|
return Macro +
|
|
((Micro & ~15) << 1) +
|
|
(Micro & 15) +
|
|
((y & 8) << (3 + LogBpp)) + ((y & 1) << 4);
|
|
}
|
|
|
|
static inline uint32 tiled_offset_2d_inner(uint32 x, uint32 y, uint32 LogBpp, uint32 BaseOffset) {
|
|
uint32 Macro = (x >> 5) << (LogBpp + 7);
|
|
uint32 Micro = (x & 7) << LogBpp;
|
|
uint32 Offset = BaseOffset + Macro + ((Micro & ~15) << 1) + (Micro & 15);
|
|
|
|
return ((Offset & ~511) << 3) + ((Offset & 448) << 2) + (Offset & 63) +
|
|
((y & 16) << 7) +
|
|
(((((y & 8) >> 2) + (x >> 3)) & 3) << 6);
|
|
}
|
|
|
|
static inline void limit(uint& x, uint n) {
|
|
int v = x - n;
|
|
int msk = (v >> 31);
|
|
x = (x & msk) | (v & ~msk);
|
|
}
|
|
|
|
bool unpack_dxt1(uint8** pDst, uint32 output_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_color_endpoints = m_color_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (output_pitch_in_bytes >> 2) - (width << 1);
|
|
|
|
if (m_block_buffer.size() < width)
|
|
m_block_buffer.resize(width);
|
|
|
|
uint32 color_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 2) {
|
|
visible = visible && x < output_width;
|
|
if (!(y & 1) && !(x & 1))
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
block_buffer_element &buffer = m_block_buffer[x];
|
|
uint8 endpoint_reference;
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
buffer.endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
}
|
|
if (!endpoint_reference) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
} else if (endpoint_reference == 1) {
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
} else {
|
|
color_endpoint_index = buffer.color_endpoint_index;
|
|
}
|
|
uint32 color_selector_index = m_codec.decode(m_selector_delta_dm[0]);
|
|
if (visible) {
|
|
pData[0] = m_color_endpoints[color_endpoint_index];
|
|
pData[1] = m_color_selectors[color_selector_index];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool unpack_dxt5(uint8** pDst, uint32 row_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_color_endpoints = m_color_endpoints.size();
|
|
const uint32 num_alpha_endpoints = m_alpha_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (row_pitch_in_bytes >> 2) - (width << 2);
|
|
|
|
if (m_block_buffer.size() < width)
|
|
m_block_buffer.resize(width);
|
|
|
|
uint32 color_endpoint_index = 0;
|
|
uint32 alpha0_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 4) {
|
|
visible = visible && x < output_width;
|
|
if (!(y & 1) && !(x & 1))
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
block_buffer_element &buffer = m_block_buffer[x];
|
|
uint8 endpoint_reference;
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
buffer.endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
}
|
|
if (!endpoint_reference) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
alpha0_endpoint_index += m_codec.decode(m_endpoint_delta_dm[1]);
|
|
if (alpha0_endpoint_index >= num_alpha_endpoints)
|
|
alpha0_endpoint_index -= num_alpha_endpoints;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else if (endpoint_reference == 1) {
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else {
|
|
color_endpoint_index = buffer.color_endpoint_index;
|
|
alpha0_endpoint_index = buffer.alpha0_endpoint_index;
|
|
}
|
|
uint32 color_selector_index = m_codec.decode(m_selector_delta_dm[0]);
|
|
uint32 alpha0_selector_index = m_codec.decode(m_selector_delta_dm[1]);
|
|
if (visible) {
|
|
const uint16* pAlpha0_selectors = &m_alpha_selectors[alpha0_selector_index * 3];
|
|
pData[0] = m_alpha_endpoints[alpha0_endpoint_index] | (pAlpha0_selectors[0] << 16);
|
|
pData[1] = pAlpha0_selectors[1] | (pAlpha0_selectors[2] << 16);
|
|
pData[2] = m_color_endpoints[color_endpoint_index];
|
|
pData[3] = m_color_selectors[color_selector_index];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool unpack_dxn(uint8** pDst, uint32 row_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_alpha_endpoints = m_alpha_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (row_pitch_in_bytes >> 2) - (width << 2);
|
|
|
|
if (m_block_buffer.size() < width)
|
|
m_block_buffer.resize(width);
|
|
|
|
uint32 alpha0_endpoint_index = 0;
|
|
uint32 alpha1_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 4) {
|
|
visible = visible && x < output_width;
|
|
if (!(y & 1) && !(x & 1))
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
block_buffer_element &buffer = m_block_buffer[x];
|
|
uint8 endpoint_reference;
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
buffer.endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
}
|
|
if (!endpoint_reference) {
|
|
alpha0_endpoint_index += m_codec.decode(m_endpoint_delta_dm[1]);
|
|
if (alpha0_endpoint_index >= num_alpha_endpoints)
|
|
alpha0_endpoint_index -= num_alpha_endpoints;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
alpha1_endpoint_index += m_codec.decode(m_endpoint_delta_dm[1]);
|
|
if (alpha1_endpoint_index >= num_alpha_endpoints)
|
|
alpha1_endpoint_index -= num_alpha_endpoints;
|
|
buffer.alpha1_endpoint_index = alpha1_endpoint_index;
|
|
} else if (endpoint_reference == 1) {
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
buffer.alpha1_endpoint_index = alpha1_endpoint_index;
|
|
} else {
|
|
alpha0_endpoint_index = buffer.alpha0_endpoint_index;
|
|
alpha1_endpoint_index = buffer.alpha1_endpoint_index;
|
|
}
|
|
uint32 alpha0_selector_index = m_codec.decode(m_selector_delta_dm[1]);
|
|
uint32 alpha1_selector_index = m_codec.decode(m_selector_delta_dm[1]);
|
|
if (visible) {
|
|
const uint16* pAlpha0_selectors = &m_alpha_selectors[alpha0_selector_index * 3];
|
|
const uint16* pAlpha1_selectors = &m_alpha_selectors[alpha1_selector_index * 3];
|
|
pData[0] = m_alpha_endpoints[alpha0_endpoint_index] | (pAlpha0_selectors[0] << 16);
|
|
pData[1] = pAlpha0_selectors[1] | (pAlpha0_selectors[2] << 16);
|
|
pData[2] = m_alpha_endpoints[alpha1_endpoint_index] | (pAlpha1_selectors[0] << 16);
|
|
pData[3] = pAlpha1_selectors[1] | (pAlpha1_selectors[2] << 16);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool unpack_dxt5a(uint8** pDst, uint32 row_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_alpha_endpoints = m_alpha_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (row_pitch_in_bytes >> 2) - (width << 1);
|
|
|
|
if (m_block_buffer.size() < width)
|
|
m_block_buffer.resize(width);
|
|
|
|
uint32 alpha0_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 2) {
|
|
visible = visible && x < output_width;
|
|
if (!(y & 1) && !(x & 1))
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
block_buffer_element &buffer = m_block_buffer[x];
|
|
uint8 endpoint_reference;
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
buffer.endpoint_reference = reference_group & 3;
|
|
reference_group >>= 2;
|
|
}
|
|
if (!endpoint_reference) {
|
|
alpha0_endpoint_index += m_codec.decode(m_endpoint_delta_dm[1]);
|
|
if (alpha0_endpoint_index >= num_alpha_endpoints)
|
|
alpha0_endpoint_index -= num_alpha_endpoints;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else if (endpoint_reference == 1) {
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else {
|
|
alpha0_endpoint_index = buffer.alpha0_endpoint_index;
|
|
}
|
|
uint32 alpha0_selector_index = m_codec.decode(m_selector_delta_dm[1]);
|
|
if (visible) {
|
|
const uint16* pAlpha0_selectors = &m_alpha_selectors[alpha0_selector_index * 3];
|
|
pData[0] = m_alpha_endpoints[alpha0_endpoint_index] | (pAlpha0_selectors[0] << 16);
|
|
pData[1] = pAlpha0_selectors[1] | (pAlpha0_selectors[2] << 16);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool unpack_etc1(uint8** pDst, uint32 output_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_color_endpoints = m_color_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (output_pitch_in_bytes >> 2) - (width << 1);
|
|
|
|
if (m_block_buffer.size() < width << 1)
|
|
m_block_buffer.resize(width << 1);
|
|
|
|
uint32 color_endpoint_index = 0, diagonal_color_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 2) {
|
|
visible = visible && x < output_width;
|
|
block_buffer_element &buffer = m_block_buffer[x << 1];
|
|
uint8 endpoint_reference, block_endpoint[4], e0[4], e1[4];
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
endpoint_reference = (reference_group & 3) | (reference_group >> 2 & 12);
|
|
buffer.endpoint_reference = (reference_group >> 2 & 3) | (reference_group >> 4 & 12);
|
|
}
|
|
if (!(endpoint_reference & 3)) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
} else if ((endpoint_reference & 3) == 1) {
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
} else if ((endpoint_reference & 3) == 3) {
|
|
buffer.color_endpoint_index = color_endpoint_index = diagonal_color_endpoint_index;
|
|
} else {
|
|
color_endpoint_index = buffer.color_endpoint_index;
|
|
}
|
|
endpoint_reference >>= 2;
|
|
*(uint32*)&e0 = m_color_endpoints[color_endpoint_index];
|
|
uint32 selector_index = m_codec.decode(m_selector_delta_dm[0]);
|
|
if (endpoint_reference) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
}
|
|
diagonal_color_endpoint_index = m_block_buffer[x << 1 | 1].color_endpoint_index;
|
|
m_block_buffer[x << 1 | 1].color_endpoint_index = color_endpoint_index;
|
|
*(uint32*)&e1 = m_color_endpoints[color_endpoint_index];
|
|
if (visible) {
|
|
uint32 flip = endpoint_reference >> 1 ^ 1, diff = 1;
|
|
for (uint c = 0; diff && c < 3; c++)
|
|
diff = e0[c] + 3 >= e1[c] && e1[c] + 4 >= e0[c] ? diff : 0;
|
|
for (uint c = 0; c < 3; c++)
|
|
block_endpoint[c] = diff ? e0[c] << 3 | ((e1[c] - e0[c]) & 7) : (e0[c] << 3 & 0xF0) | e1[c] >> 1;
|
|
block_endpoint[3] = e0[3] << 5 | e1[3] << 2 | diff << 1 | flip;
|
|
pData[0] = *(uint32*)&block_endpoint;
|
|
pData[1] = m_color_selectors[selector_index << 1 | flip];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool unpack_etc2a(uint8** pDst, uint32 output_pitch_in_bytes, uint32 output_width, uint32 output_height) {
|
|
const uint32 num_color_endpoints = m_color_endpoints.size();
|
|
const uint32 num_alpha_endpoints = m_alpha_endpoints.size();
|
|
const uint32 width = output_width + 1 & ~1;
|
|
const uint32 height = output_height + 1 & ~1;
|
|
const int32 delta_pitch_in_dwords = (output_pitch_in_bytes >> 2) - (width << 2);
|
|
|
|
if (m_block_buffer.size() < width << 1)
|
|
m_block_buffer.resize(width << 1);
|
|
|
|
uint32 color_endpoint_index = 0, diagonal_color_endpoint_index = 0, alpha0_endpoint_index = 0, diagonal_alpha0_endpoint_index = 0;
|
|
uint8 reference_group = 0;
|
|
|
|
for (uint32 f = 0; f < m_pHeader->m_faces; f++) {
|
|
uint32* pData = (uint32*)pDst[f];
|
|
for (uint32 y = 0; y < height; y++, pData += delta_pitch_in_dwords) {
|
|
bool visible = y < output_height;
|
|
for (uint32 x = 0; x < width; x++, pData += 4) {
|
|
visible = visible && x < output_width;
|
|
block_buffer_element &buffer = m_block_buffer[x << 1];
|
|
uint8 endpoint_reference, block_endpoint[4], e0[4], e1[4];
|
|
if (y & 1) {
|
|
endpoint_reference = buffer.endpoint_reference;
|
|
} else {
|
|
reference_group = m_codec.decode(m_reference_encoding_dm);
|
|
endpoint_reference = (reference_group & 3) | (reference_group >> 2 & 12);
|
|
buffer.endpoint_reference = (reference_group >> 2 & 3) | (reference_group >> 4 & 12);
|
|
}
|
|
if (!(endpoint_reference & 3)) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
alpha0_endpoint_index += m_codec.decode(m_endpoint_delta_dm[1]);
|
|
if (alpha0_endpoint_index >= num_alpha_endpoints)
|
|
alpha0_endpoint_index -= num_alpha_endpoints;
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else if ((endpoint_reference & 3) == 1) {
|
|
buffer.color_endpoint_index = color_endpoint_index;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index;
|
|
} else if ((endpoint_reference & 3) == 3) {
|
|
buffer.color_endpoint_index = color_endpoint_index = diagonal_color_endpoint_index;
|
|
buffer.alpha0_endpoint_index = alpha0_endpoint_index = diagonal_alpha0_endpoint_index;
|
|
} else {
|
|
color_endpoint_index = buffer.color_endpoint_index;
|
|
alpha0_endpoint_index = buffer.alpha0_endpoint_index;
|
|
}
|
|
endpoint_reference >>= 2;
|
|
*(uint32*)&e0 = m_color_endpoints[color_endpoint_index];
|
|
uint32 color_selector_index = m_codec.decode(m_selector_delta_dm[0]);
|
|
uint32 alpha0_selector_index = m_codec.decode(m_selector_delta_dm[1]);
|
|
if (endpoint_reference) {
|
|
color_endpoint_index += m_codec.decode(m_endpoint_delta_dm[0]);
|
|
if (color_endpoint_index >= num_color_endpoints)
|
|
color_endpoint_index -= num_color_endpoints;
|
|
}
|
|
*(uint32*)&e1 = m_color_endpoints[color_endpoint_index];
|
|
diagonal_color_endpoint_index = m_block_buffer[x << 1 | 1].color_endpoint_index;
|
|
diagonal_alpha0_endpoint_index = m_block_buffer[x << 1 | 1].alpha0_endpoint_index;
|
|
m_block_buffer[x << 1 | 1].color_endpoint_index = color_endpoint_index;
|
|
m_block_buffer[x << 1 | 1].alpha0_endpoint_index = alpha0_endpoint_index;
|
|
if (visible) {
|
|
uint32 flip = endpoint_reference >> 1 ^ 1, diff = 1;
|
|
for (uint c = 0; diff && c < 3; c++)
|
|
diff = e0[c] + 3 >= e1[c] && e1[c] + 4 >= e0[c] ? diff : 0;
|
|
for (uint c = 0; c < 3; c++)
|
|
block_endpoint[c] = diff ? e0[c] << 3 | ((e1[c] - e0[c]) & 7) : (e0[c] << 3 & 0xF0) | e1[c] >> 1;
|
|
block_endpoint[3] = e0[3] << 5 | e1[3] << 2 | diff << 1 | flip;
|
|
const uint16* pAlpha0_selectors = &m_alpha_selectors[alpha0_selector_index * 6 + (flip ? 3 : 0)];
|
|
pData[0] = m_alpha_endpoints[alpha0_endpoint_index] | pAlpha0_selectors[0] << 16;
|
|
pData[1] = pAlpha0_selectors[1] | pAlpha0_selectors[2] << 16;
|
|
pData[2] = *(uint32*)&block_endpoint;
|
|
pData[3] = m_color_selectors[color_selector_index << 1 | flip];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
};
|
|
|
|
crnd_unpack_context crnd_unpack_begin(const void* pData, uint32 data_size) {
|
|
if ((!pData) || (data_size < cCRNHeaderMinSize))
|
|
return NULL;
|
|
|
|
crn_unpacker* p = crnd_new<crn_unpacker>();
|
|
if (!p)
|
|
return NULL;
|
|
|
|
if (!p->init(pData, data_size)) {
|
|
crnd_delete(p);
|
|
return NULL;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
bool crnd_get_data(crnd_unpack_context pContext, const void** ppData, uint32* pData_size) {
|
|
if (!pContext)
|
|
return false;
|
|
|
|
crn_unpacker* pUnpacker = static_cast<crn_unpacker*>(pContext);
|
|
|
|
if (!pUnpacker->is_valid())
|
|
return false;
|
|
|
|
if (ppData)
|
|
*ppData = pUnpacker->get_data();
|
|
|
|
if (pData_size)
|
|
*pData_size = pUnpacker->get_data_size();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool crnd_unpack_level(
|
|
crnd_unpack_context pContext,
|
|
void** pDst, uint32 dst_size_in_bytes, uint32 row_pitch_in_bytes,
|
|
uint32 level_index) {
|
|
if ((!pContext) || (!pDst) || (dst_size_in_bytes < 8U) || (level_index >= cCRNMaxLevels))
|
|
return false;
|
|
|
|
crn_unpacker* pUnpacker = static_cast<crn_unpacker*>(pContext);
|
|
|
|
if (!pUnpacker->is_valid())
|
|
return false;
|
|
|
|
return pUnpacker->unpack_level(pDst, dst_size_in_bytes, row_pitch_in_bytes, level_index);
|
|
}
|
|
|
|
bool crnd_unpack_level_segmented(
|
|
crnd_unpack_context pContext,
|
|
const void* pSrc, uint32 src_size_in_bytes,
|
|
void** pDst, uint32 dst_size_in_bytes, uint32 row_pitch_in_bytes,
|
|
uint32 level_index) {
|
|
if ((!pContext) || (!pSrc) || (!pDst) || (dst_size_in_bytes < 8U) || (level_index >= cCRNMaxLevels))
|
|
return false;
|
|
|
|
crn_unpacker* pUnpacker = static_cast<crn_unpacker*>(pContext);
|
|
|
|
if (!pUnpacker->is_valid())
|
|
return false;
|
|
|
|
return pUnpacker->unpack_level(pSrc, src_size_in_bytes, pDst, dst_size_in_bytes, row_pitch_in_bytes, level_index);
|
|
}
|
|
|
|
bool crnd_unpack_end(crnd_unpack_context pContext) {
|
|
if (!pContext)
|
|
return false;
|
|
|
|
crn_unpacker* pUnpacker = static_cast<crn_unpacker*>(pContext);
|
|
|
|
if (!pUnpacker->is_valid())
|
|
return false;
|
|
|
|
crnd_delete(pUnpacker);
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace unitycrnd
|
|
|
|
#endif // CRND_INCLUDE_CRND_H
|
|
|
|
//------------------------------------------------------------------------------
|
|
//
|
|
// crn_decomp.h uses the ZLIB license:
|
|
// http://opensource.org/licenses/Zlib
|
|
//
|
|
// Copyright (c) 2010-2016 Richard Geldreich, Jr. and Binomial LLC
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
//
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
//
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would be
|
|
// appreciated but is not required.
|
|
//
|
|
// 2. Altered source versions must be plainly marked as such, and must not be
|
|
// misrepresented as being the original software.
|
|
//
|
|
// 3. This notice may not be removed or altered from any source distribution.
|
|
//
|
|
//------------------------------------------------------------------------------
|