34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
#include "unitycrunch.h"
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#include <stdint.h>
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#include <algorithm>
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#include "unitycrunch/crn_decomp.h"
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bool unity_crunch_unpack_level(const uint8_t* data, uint32_t data_size, uint32_t level_index, void** ret, uint32_t* ret_size) {
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unitycrnd::crn_texture_info tex_info;
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if (!unitycrnd::crnd_get_texture_info(data, data_size, &tex_info))
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{
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return false;
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}
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unitycrnd::crnd_unpack_context pContext = unitycrnd::crnd_unpack_begin(data, data_size);
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if (!pContext)
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{
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return false;
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}
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const crn_uint32 width = std::max(1U, tex_info.m_width >> level_index);
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const crn_uint32 height = std::max(1U, tex_info.m_height >> level_index);
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const crn_uint32 blocks_x = std::max(1U, (width + 3) >> 2);
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const crn_uint32 blocks_y = std::max(1U, (height + 3) >> 2);
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const crn_uint32 row_pitch = blocks_x * unitycrnd::crnd_get_bytes_per_dxt_block(tex_info.m_format);
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const crn_uint32 total_face_size = row_pitch * blocks_y;
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*ret = new uint8_t[total_face_size];
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*ret_size = total_face_size;
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if (!unitycrnd::crnd_unpack_level(pContext, ret, total_face_size, row_pitch, level_index))
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{
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unitycrnd::crnd_unpack_end(pContext);
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return false;
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}
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unitycrnd::crnd_unpack_end(pContext);
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return true;
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} |