1087 lines
28 KiB
C
1087 lines
28 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* LCD driver for horizontally-packed 2bpp greyscale display
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*
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* Based on code from the rockbox lcd's driver
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*
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* Copyright (c) 2006 Seven Le Mesle (sevlm@free.fr)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "thread.h"
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#include <string.h>
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#include <stdlib.h>
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#include "file.h"
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#include "debug.h"
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#include "system.h"
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#include "font.h"
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#include "rbunicode.h"
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#include "bidi.h"
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#include "scroll_engine.h"
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/*** globals ***/
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static unsigned char lcd_static_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH] IRAM_LCDFRAMEBUFFER;
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static void *lcd_frameaddress_default(int x, int y);
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static const unsigned char pixmask[4] ICONST_ATTR = {
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0xC0, 0x30, 0x0C, 0x03
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};
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static fb_data* lcd_backdrop = NULL;
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static long lcd_backdrop_offset IDATA_ATTR = 0;
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/* shouldn't be changed unless you want system-wide framebuffer changes! */
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struct frame_buffer_t lcd_framebuffer_default =
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{
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.fb_ptr = &lcd_static_framebuffer[0][0],
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.get_address_fn = &lcd_frameaddress_default,
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.stride = STRIDE_MAIN(LCD_WIDTH, LCD_HEIGHT),
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.elems = (LCD_FBWIDTH*LCD_FBHEIGHT),
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};
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static struct viewport default_vp =
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{
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.x = 0,
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.y = 0,
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.width = LCD_WIDTH,
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.height = LCD_HEIGHT,
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.font = FONT_SYSFIXED,
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.drawmode = DRMODE_SOLID,
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.buffer = NULL,
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.fg_pattern = LCD_DEFAULT_FG,
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.bg_pattern = LCD_DEFAULT_BG
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};
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struct viewport* lcd_current_viewport IBSS_ATTR;
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static unsigned fg_pattern IBSS_ATTR;
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static unsigned bg_pattern IBSS_ATTR;
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static void *lcd_frameaddress_default(int x, int y)
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{
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/* the default expects a buffer the same size as the screen */
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struct frame_buffer_t *fb = lcd_current_viewport->buffer;
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#if defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
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size_t element = (x * LCD_NATIVE_STRIDE(fb->stride)) + y;
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#else
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size_t element = (y * LCD_NATIVE_STRIDE(fb->stride)) + x;
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#endif
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return fb->fb_ptr + element;/*(element % fb->elems);*/
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}
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/* LCD init */
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void lcd_init(void)
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{
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/* Initialize the viewport */
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lcd_set_viewport(NULL);
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lcd_clear_display();
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/* Call device specific init */
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lcd_init_device();
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scroll_init();
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}
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/*** parameter handling ***/
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void lcd_set_drawmode(int mode)
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{
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lcd_current_viewport->drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
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}
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int lcd_get_drawmode(void)
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{
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return lcd_current_viewport->drawmode;
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}
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void lcd_set_foreground(unsigned brightness)
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{
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lcd_current_viewport->fg_pattern = brightness;
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fg_pattern = 0x55 * (~brightness & 3);
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}
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unsigned lcd_get_foreground(void)
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{
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return lcd_current_viewport->fg_pattern;
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}
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void lcd_set_background(unsigned brightness)
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{
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lcd_current_viewport->bg_pattern = brightness;
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bg_pattern = 0x55 * (~brightness & 3);
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}
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unsigned lcd_get_background(void)
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{
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return lcd_current_viewport->bg_pattern;
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}
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void lcd_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
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{
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lcd_set_drawmode(mode);
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lcd_set_foreground(fg_brightness);
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lcd_set_background(bg_brightness);
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}
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int lcd_getwidth(void)
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{
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return lcd_current_viewport->width;
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}
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int lcd_getheight(void)
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{
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return lcd_current_viewport->height;
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}
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void lcd_setfont(int newfont)
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{
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lcd_current_viewport->font = newfont;
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}
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int lcd_getfont(void)
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{
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return lcd_current_viewport->font;
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}
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int lcd_getstringsize(const unsigned char *str, int *w, int *h)
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{
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return font_getstringsize(str, w, h, lcd_current_viewport->font);
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}
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/*** low-level drawing functions ***/
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static void setpixel(int x, int y)
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{
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unsigned mask = pixmask[x & 3];
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fb_data *address = FBADDR(x>>2,y);
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unsigned data = *address;
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*address = data ^ ((data ^ fg_pattern) & mask);
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}
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static void clearpixel(int x, int y)
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{
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unsigned mask = pixmask[x & 3];
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fb_data *address = FBADDR(x>>2,y);
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unsigned data = *address;
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*address = data ^ ((data ^ bg_pattern) & mask);
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}
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static void clearimgpixel(int x, int y)
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{
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unsigned mask = pixmask[x & 3];
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fb_data *address = FBADDR(x>>2,y);
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unsigned data = *address;
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*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask);
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}
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static void flippixel(int x, int y)
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{
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unsigned mask = pixmask[x & 3];
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fb_data *address = FBADDR(x>>2,y);
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*address ^= mask;
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}
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static void nopixel(int x, int y)
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{
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(void)x;
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(void)y;
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}
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lcd_pixelfunc_type* const lcd_pixelfuncs_bgcolor[8] = {
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flippixel, nopixel, setpixel, setpixel,
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nopixel, clearpixel, nopixel, clearpixel
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};
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lcd_pixelfunc_type* const lcd_pixelfuncs_backdrop[8] = {
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flippixel, nopixel, setpixel, setpixel,
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nopixel, clearimgpixel, nopixel, clearimgpixel
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};
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lcd_pixelfunc_type* const * lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
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/* 'mask' and 'bits' contain 2 bits per pixel */
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static void ICODE_ATTR flipblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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*address ^= bits & mask;
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}
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static void ICODE_ATTR bgblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ bg_pattern) & mask & ~bits);
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}
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static void ICODE_ATTR bgimgblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & ~bits);
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}
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static void ICODE_ATTR fgblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ fg_pattern) & mask & bits);
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}
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static void ICODE_ATTR solidblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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unsigned bgp = bg_pattern;
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bits = bgp ^ ((bgp ^ fg_pattern) & bits);
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*address = data ^ ((data ^ bits) & mask);
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}
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static void ICODE_ATTR solidimgblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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unsigned bgp = *(address + lcd_backdrop_offset);
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bits = bgp ^ ((bgp ^ fg_pattern) & bits);
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*address = data ^ ((data ^ bits) & mask);
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}
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static void ICODE_ATTR flipinvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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*address ^= ~bits & mask;
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}
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static void ICODE_ATTR bginvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ bg_pattern) & mask & bits);
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}
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static void ICODE_ATTR bgimginvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & bits);
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}
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static void ICODE_ATTR fginvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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*address = data ^ ((data ^ fg_pattern) & mask & ~bits);
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}
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static void ICODE_ATTR solidinvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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unsigned fgp = fg_pattern;
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bits = fgp ^ ((fgp ^ bg_pattern) & bits);
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*address = data ^ ((data ^ bits) & mask);
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}
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static void ICODE_ATTR solidimginvblock(fb_data *address, unsigned mask,
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unsigned bits)
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{
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unsigned data = *address;
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unsigned fgp = fg_pattern;
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bits = fgp ^ ((fgp ^ *(address + lcd_backdrop_offset)) & bits);
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*address = data ^ ((data ^ bits) & mask);
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}
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lcd_blockfunc_type* const lcd_blockfuncs_bgcolor[8] = {
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flipblock, bgblock, fgblock, solidblock,
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flipinvblock, bginvblock, fginvblock, solidinvblock
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};
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lcd_blockfunc_type* const lcd_blockfuncs_backdrop[8] = {
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flipblock, bgimgblock, fgblock, solidimgblock,
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flipinvblock, bgimginvblock, fginvblock, solidimginvblock
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};
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lcd_blockfunc_type* const * lcd_blockfuncs = lcd_blockfuncs_bgcolor;
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void lcd_set_backdrop(fb_data* backdrop)
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{
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lcd_backdrop = backdrop;
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if (backdrop)
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{
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lcd_backdrop_offset = (long)backdrop - (long)FBADDR(0,0);
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lcd_pixelfuncs = lcd_pixelfuncs_backdrop;
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lcd_blockfuncs = lcd_blockfuncs_backdrop;
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}
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else
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{
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lcd_backdrop_offset = 0;
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lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
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lcd_blockfuncs = lcd_blockfuncs_bgcolor;
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}
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}
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fb_data* lcd_get_backdrop(void)
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{
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return lcd_backdrop;
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}
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static inline void setblock(fb_data *address, unsigned mask, unsigned bits)
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{
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unsigned data = *address;
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bits ^= data;
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*address = data ^ (bits & mask);
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}
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/*** drawing functions ***/
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/* Clear the whole display */
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void lcd_clear_display(void)
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{
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if (lcd_current_viewport->drawmode & DRMODE_INVERSEVID)
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{
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memset(FBADDR(0,0), fg_pattern, FRAMEBUFFER_SIZE);
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}
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else
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{
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if (lcd_backdrop)
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memcpy(FBADDR(0,0), lcd_backdrop, FRAMEBUFFER_SIZE);
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else
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memset(FBADDR(0,0), bg_pattern, FRAMEBUFFER_SIZE);
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}
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lcd_scroll_info.lines = 0;
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}
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/* Clear the current viewport */
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void lcd_clear_viewport(void)
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{
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int lastmode;
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if (lcd_current_viewport == &default_vp &&
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default_vp.buffer == &lcd_framebuffer_default)
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{
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lcd_clear_display();
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}
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else
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{
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lastmode = lcd_current_viewport->drawmode;
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/* Invert the INVERSEVID bit and set basic mode to SOLID */
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lcd_current_viewport->drawmode = (~lastmode & DRMODE_INVERSEVID) |
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DRMODE_SOLID;
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lcd_fillrect(0, 0, lcd_current_viewport->width, lcd_current_viewport->height);
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lcd_current_viewport->drawmode = lastmode;
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lcd_scroll_stop_viewport(lcd_current_viewport);
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}
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lcd_current_viewport->flags &= ~(VP_FLAG_VP_SET_CLEAN);
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}
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/* Set a single pixel */
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void lcd_drawpixel(int x, int y)
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{
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if ( ((unsigned)x < (unsigned)lcd_current_viewport->width)
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&& ((unsigned)y < (unsigned)lcd_current_viewport->height)
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#if defined(HAVE_VIEWPORT_CLIP)
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&& ((unsigned)x < (unsigned)LCD_WIDTH)
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&& ((unsigned)y < (unsigned)LCD_HEIGHT)
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#endif
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)
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lcd_pixelfuncs[lcd_current_viewport->drawmode](lcd_current_viewport->x + x, lcd_current_viewport->y + y);
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}
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/* Draw a line */
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void lcd_drawline(int x1, int y1, int x2, int y2)
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{
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int numpixels;
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int i;
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int deltax, deltay;
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int d, dinc1, dinc2;
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int x, xinc1, xinc2;
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int y, yinc1, yinc2;
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lcd_pixelfunc_type *pfunc = lcd_pixelfuncs[lcd_current_viewport->drawmode];
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deltay = abs(y2 - y1);
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if (deltay == 0)
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{
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/* DEBUGF("lcd_drawline() called for horizontal line - optimisation.\n"); */
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lcd_hline(x1, x2, y1);
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return;
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}
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deltax = abs(x2 - x1);
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if (deltax == 0)
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{
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/* DEBUGF("lcd_drawline() called for vertical line - optimisation.\n"); */
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lcd_vline(x1, y1, y2);
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return;
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}
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xinc2 = 1;
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yinc2 = 1;
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if (deltax >= deltay)
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{
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numpixels = deltax;
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d = 2 * deltay - deltax;
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dinc1 = deltay * 2;
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dinc2 = (deltay - deltax) * 2;
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xinc1 = 1;
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yinc1 = 0;
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}
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else
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{
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numpixels = deltay;
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d = 2 * deltax - deltay;
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dinc1 = deltax * 2;
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dinc2 = (deltax - deltay) * 2;
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xinc1 = 0;
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yinc1 = 1;
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}
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numpixels++; /* include endpoints */
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if (x1 > x2)
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{
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xinc1 = -xinc1;
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xinc2 = -xinc2;
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}
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if (y1 > y2)
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{
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yinc1 = -yinc1;
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yinc2 = -yinc2;
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}
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x = x1;
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y = y1;
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for (i = 0; i < numpixels; i++)
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{
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if ( ((unsigned)x < (unsigned)lcd_current_viewport->width)
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&& ((unsigned)y < (unsigned)lcd_current_viewport->height)
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#if defined(HAVE_VIEWPORT_CLIP)
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&& ((unsigned)x < (unsigned)LCD_WIDTH)
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&& ((unsigned)y < (unsigned)LCD_HEIGHT)
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#endif
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)
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pfunc(lcd_current_viewport->x + x, lcd_current_viewport->y + y);
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if (d < 0)
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{
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d += dinc1;
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x += xinc1;
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y += yinc1;
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}
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else
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{
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d += dinc2;
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x += xinc2;
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y += yinc2;
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}
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}
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}
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/* Draw a horizontal line (optimised) */
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void lcd_hline(int x1, int x2, int y)
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{
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int nx;
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unsigned char *dst;
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unsigned mask, mask_right;
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lcd_blockfunc_type *bfunc;
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/* direction flip */
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if (x2 < x1)
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{
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nx = x1;
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x1 = x2;
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x2 = nx;
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}
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/******************** In viewport clipping **********************/
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/* nothing to draw? */
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if (((unsigned)y >= (unsigned)lcd_current_viewport->height) || (x1 >= lcd_current_viewport->width)
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|| (x2 < 0))
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return;
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if (x1 < 0)
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x1 = 0;
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if (x2 >= lcd_current_viewport->width)
|
|
x2 = lcd_current_viewport->width-1;
|
|
|
|
/* adjust to viewport */
|
|
x1 += lcd_current_viewport->x;
|
|
x2 += lcd_current_viewport->x;
|
|
y += lcd_current_viewport->y;
|
|
|
|
#if defined(HAVE_VIEWPORT_CLIP)
|
|
/********************* Viewport on screen clipping ********************/
|
|
/* nothing to draw? */
|
|
if (((unsigned)y >= (unsigned) LCD_HEIGHT) || (x1 >= LCD_WIDTH)
|
|
|| (x2 < 0))
|
|
return;
|
|
|
|
/* clipping */
|
|
if (x1 < 0)
|
|
x1 = 0;
|
|
if (x2 >= LCD_WIDTH)
|
|
x2 = LCD_WIDTH-1;
|
|
#endif
|
|
|
|
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
|
|
dst = FBADDR(x1>>2,y);
|
|
nx = x2 - (x1 & ~3);
|
|
mask = 0xFFu >> (2 * (x1 & 3));
|
|
mask_right = 0xFFu << (2 * (~nx & 3));
|
|
|
|
for (; nx >= 4; nx -= 4)
|
|
{
|
|
bfunc(dst++, mask, 0xFFu);
|
|
mask = 0xFFu;
|
|
}
|
|
mask &= mask_right;
|
|
bfunc(dst, mask, 0xFFu);
|
|
}
|
|
|
|
/* Draw a vertical line (optimised) */
|
|
void lcd_vline(int x, int y1, int y2)
|
|
{
|
|
int y;
|
|
unsigned char *dst, *dst_end;
|
|
int stride_dst;
|
|
unsigned mask;
|
|
lcd_blockfunc_type *bfunc;
|
|
|
|
/* direction flip */
|
|
if (y2 < y1)
|
|
{
|
|
y = y1;
|
|
y1 = y2;
|
|
y2 = y;
|
|
}
|
|
|
|
/******************** In viewport clipping **********************/
|
|
/* nothing to draw? */
|
|
if (((unsigned)x >= (unsigned)lcd_current_viewport->width) || (y1 >= lcd_current_viewport->height)
|
|
|| (y2 < 0))
|
|
return;
|
|
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
if (y2 >= lcd_current_viewport->height)
|
|
y2 = lcd_current_viewport->height-1;
|
|
|
|
/* adjust for viewport */
|
|
y1 += lcd_current_viewport->y;
|
|
y2 += lcd_current_viewport->y;
|
|
x += lcd_current_viewport->x;
|
|
|
|
#if defined(HAVE_VIEWPORT_CLIP)
|
|
/********************* Viewport on screen clipping ********************/
|
|
/* nothing to draw? */
|
|
if (( (unsigned) x >= (unsigned)LCD_WIDTH) || (y1 >= LCD_HEIGHT)
|
|
|| (y2 < 0))
|
|
return;
|
|
|
|
/* clipping */
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
if (y2 >= LCD_HEIGHT)
|
|
y2 = LCD_HEIGHT-1;
|
|
#endif
|
|
|
|
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
|
|
dst = FBADDR(x>>2,y1);
|
|
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
|
|
mask = pixmask[x & 3];
|
|
|
|
dst_end = dst + (y2 - y1) * stride_dst;
|
|
do
|
|
{
|
|
bfunc(dst, mask, 0xFFu);
|
|
dst += stride_dst;
|
|
}
|
|
while (dst <= dst_end);
|
|
}
|
|
|
|
/* Draw a rectangular box */
|
|
void lcd_drawrect(int x, int y, int width, int height)
|
|
{
|
|
if ((width <= 0) || (height <= 0))
|
|
return;
|
|
|
|
int x2 = x + width - 1;
|
|
int y2 = y + height - 1;
|
|
|
|
lcd_vline(x, y, y2);
|
|
lcd_vline(x2, y, y2);
|
|
lcd_hline(x, x2, y);
|
|
lcd_hline(x, x2, y2);
|
|
}
|
|
|
|
/* Fill a rectangular area */
|
|
void lcd_fillrect(int x, int y, int width, int height)
|
|
{
|
|
int nx;
|
|
unsigned char *dst, *dst_end;
|
|
int stride_dst;
|
|
unsigned mask, mask_right;
|
|
lcd_blockfunc_type *bfunc;
|
|
|
|
/******************** In viewport clipping **********************/
|
|
/* nothing to draw? */
|
|
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) || (y >= lcd_current_viewport->height)
|
|
|| (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
y = 0;
|
|
}
|
|
if (x + width > lcd_current_viewport->width)
|
|
width = lcd_current_viewport->width - x;
|
|
if (y + height > lcd_current_viewport->height)
|
|
height = lcd_current_viewport->height - y;
|
|
|
|
/* adjust for viewport */
|
|
x += lcd_current_viewport->x;
|
|
y += lcd_current_viewport->y;
|
|
|
|
#if defined(HAVE_VIEWPORT_CLIP)
|
|
/********************* Viewport on screen clipping ********************/
|
|
/* nothing to draw? */
|
|
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|
|
|| (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
/* clip image in viewport in screen */
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
y = 0;
|
|
}
|
|
if (x + width > LCD_WIDTH)
|
|
width = LCD_WIDTH - x;
|
|
if (y + height > LCD_HEIGHT)
|
|
height = LCD_HEIGHT - y;
|
|
#endif
|
|
|
|
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
|
|
dst = FBADDR(x>>2,y);
|
|
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
|
|
nx = width - 1 + (x & 3);
|
|
mask = 0xFFu >> (2 * (x & 3));
|
|
mask_right = 0xFFu << (2 * (~nx & 3));
|
|
|
|
for (; nx >= 4; nx -= 4)
|
|
{
|
|
unsigned char *dst_col = dst;
|
|
|
|
dst_end = dst_col + height * stride_dst;
|
|
do
|
|
{
|
|
bfunc(dst_col, mask, 0xFFu);
|
|
dst_col += stride_dst;
|
|
}
|
|
while (dst_col < dst_end);
|
|
|
|
dst++;
|
|
mask = 0xFFu;
|
|
}
|
|
mask &= mask_right;
|
|
|
|
dst_end = dst + height * stride_dst;
|
|
do
|
|
{
|
|
bfunc(dst, mask, 0xFFu);
|
|
dst += stride_dst;
|
|
}
|
|
while (dst < dst_end);
|
|
}
|
|
|
|
/* About Rockbox' internal monochrome bitmap format:
|
|
*
|
|
* A bitmap contains one bit for every pixel that defines if that pixel is
|
|
* black (1) or white (0). Bits within a byte are arranged vertically, LSB
|
|
* at top.
|
|
* The bytes are stored in row-major order, with byte 0 being top left,
|
|
* byte 1 2nd from left etc. The first row of bytes defines pixel rows
|
|
* 0..7, the second row defines pixel row 8..15 etc. */
|
|
|
|
/* Draw a partial monochrome bitmap */
|
|
void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
|
|
int src_y, int stride, int x, int y,
|
|
int width, int height)
|
|
{
|
|
const unsigned char *src_end;
|
|
fb_data *dst, *dst_end;
|
|
int stride_dst;
|
|
unsigned dmask = 0x100; /* bit 8 == sentinel */
|
|
unsigned dst_mask;
|
|
int drmode = lcd_current_viewport->drawmode;
|
|
|
|
/******************** Image in viewport clipping **********************/
|
|
/* nothing to draw? */
|
|
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) ||
|
|
(y >= lcd_current_viewport->height) || (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
src_x -= x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
src_y -= y;
|
|
y = 0;
|
|
}
|
|
if (x + width > lcd_current_viewport->width)
|
|
width = lcd_current_viewport->width - x;
|
|
if (y + height > lcd_current_viewport->height)
|
|
height = lcd_current_viewport->height - y;
|
|
|
|
x += lcd_current_viewport->x; /* adjust for viewport */
|
|
y += lcd_current_viewport->y; /* adjust for viewport */
|
|
|
|
#if defined(HAVE_VIEWPORT_CLIP)
|
|
/********************* Viewport on screen clipping ********************/
|
|
/* nothing to draw? */
|
|
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|
|
|| (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
/* clip image in viewport in screen */
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
src_x -= x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
src_y -= y;
|
|
y = 0;
|
|
}
|
|
if (x + width > LCD_WIDTH)
|
|
width = LCD_WIDTH - x;
|
|
if (y + height > LCD_HEIGHT)
|
|
height = LCD_HEIGHT - y;
|
|
#endif
|
|
|
|
src += stride * (src_y >> 3) + src_x; /* move starting point */
|
|
src_y &= 7;
|
|
src_end = src + width;
|
|
|
|
dst = FBADDR(x >> 2,y);
|
|
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
|
|
dst_end = dst + height * stride_dst;
|
|
dst_mask = pixmask[x & 3];
|
|
|
|
if (drmode & DRMODE_INVERSEVID)
|
|
{
|
|
dmask = 0x1ff; /* bit 8 == sentinel */
|
|
drmode &= DRMODE_SOLID; /* mask out inversevid */
|
|
}
|
|
|
|
do
|
|
{
|
|
const unsigned char *src_col = src++;
|
|
unsigned data = (*src_col ^ dmask) >> src_y;
|
|
fb_data *dst_col = dst;
|
|
int fg, bg;
|
|
long bo;
|
|
|
|
#define UPDATE_SRC do { \
|
|
data >>= 1; \
|
|
if (data == 0x001) { \
|
|
src_col += stride; \
|
|
data = *src_col ^ dmask; \
|
|
} \
|
|
} while (0)
|
|
|
|
switch (drmode)
|
|
{
|
|
case DRMODE_COMPLEMENT:
|
|
do
|
|
{
|
|
if (data & 0x01)
|
|
*dst_col ^= dst_mask;
|
|
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
break;
|
|
|
|
case DRMODE_BG:
|
|
if (lcd_backdrop)
|
|
{
|
|
bo = lcd_backdrop_offset;
|
|
do
|
|
{
|
|
if (!(data & 0x01))
|
|
{
|
|
unsigned block = *dst_col;
|
|
*dst_col = block
|
|
^ ((block ^ *(dst_col + bo)) & dst_mask);
|
|
}
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
}
|
|
else
|
|
{
|
|
bg = bg_pattern;
|
|
do
|
|
{
|
|
if (!(data & 0x01))
|
|
{
|
|
unsigned block = *dst_col;
|
|
*dst_col = block ^ ((block ^ bg) & dst_mask);
|
|
}
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
}
|
|
break;
|
|
|
|
case DRMODE_FG:
|
|
fg = fg_pattern;
|
|
do
|
|
{
|
|
if (data & 0x01)
|
|
{
|
|
unsigned block = *dst_col;
|
|
*dst_col = block ^ ((block ^ fg) & dst_mask);
|
|
}
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
break;
|
|
|
|
case DRMODE_SOLID:
|
|
fg = fg_pattern;
|
|
if (lcd_backdrop)
|
|
{
|
|
bo = lcd_backdrop_offset;
|
|
do
|
|
{
|
|
unsigned block = *dst_col;
|
|
*dst_col = block ^ ((block ^ ((data & 0x01) ?
|
|
fg : *(dst_col + bo))) & dst_mask);
|
|
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
}
|
|
else
|
|
{
|
|
bg = bg_pattern;
|
|
do
|
|
{
|
|
unsigned block = *dst_col;
|
|
*dst_col = block ^ ((block ^ ((data & 0x01) ?
|
|
fg : bg)) & dst_mask);
|
|
|
|
dst_col += stride_dst;
|
|
UPDATE_SRC;
|
|
}
|
|
while (dst_col < dst_end);
|
|
}
|
|
break;
|
|
}
|
|
dst_mask >>= 2;
|
|
if (dst_mask == 0)
|
|
{
|
|
dst++;
|
|
dst_mask = 0xC0;
|
|
}
|
|
}
|
|
while (src < src_end);
|
|
}
|
|
|
|
/* Draw a full monochrome bitmap */
|
|
void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int height)
|
|
{
|
|
lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
|
|
}
|
|
|
|
/* About Rockbox' internal native bitmap format:
|
|
*
|
|
* A bitmap contains two bits for every pixel. 00 = white, 01 = light grey,
|
|
* 10 = dark grey, 11 = black. Bits within a byte are arranged horizontally,
|
|
* MSB at the left.
|
|
* The bytes are stored in row-major order, with byte 0 being top left,
|
|
* byte 1 2nd from left etc. Each row of bytes defines one pixel row.
|
|
*
|
|
* This is the same as the internal lcd hw format. */
|
|
|
|
/* Draw a partial native bitmap */
|
|
void ICODE_ATTR lcd_bitmap_part(const unsigned char *src, int src_x,
|
|
int src_y, int stride, int x, int y,
|
|
int width, int height)
|
|
{
|
|
int shift, nx;
|
|
unsigned char *dst, *dst_end;
|
|
int stride_dst;
|
|
unsigned mask, mask_right;
|
|
|
|
/******************** Image in viewport clipping **********************/
|
|
/* nothing to draw? */
|
|
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) ||
|
|
(y >= lcd_current_viewport->height) || (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
src_x -= x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
src_y -= y;
|
|
y = 0;
|
|
}
|
|
if (x + width > lcd_current_viewport->width)
|
|
width = lcd_current_viewport->width - x;
|
|
if (y + height > lcd_current_viewport->height)
|
|
height = lcd_current_viewport->height - y;
|
|
|
|
/* adjust for viewport */
|
|
x += lcd_current_viewport->x;
|
|
y += lcd_current_viewport->y;
|
|
|
|
#if defined(HAVE_VIEWPORT_CLIP)
|
|
/********************* Viewport on screen clipping ********************/
|
|
/* nothing to draw? */
|
|
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|
|
|| (x + width <= 0) || (y + height <= 0))
|
|
return;
|
|
|
|
/* clip image in viewport in screen */
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
src_x -= x;
|
|
x = 0;
|
|
}
|
|
if (y < 0)
|
|
{
|
|
height += y;
|
|
src_y -= y;
|
|
y = 0;
|
|
}
|
|
if (x + width > LCD_WIDTH)
|
|
width = LCD_WIDTH - x;
|
|
if (y + height > LCD_HEIGHT)
|
|
height = LCD_HEIGHT - y;
|
|
#endif
|
|
|
|
stride = LCD_FBSTRIDE(stride, 0); /* convert to no. of bytes */
|
|
|
|
src += stride * src_y + (src_x >> 2); /* move starting point */
|
|
src_x &= 3;
|
|
x -= src_x;
|
|
dst = FBADDR(x>>2,y);
|
|
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
|
|
shift = x & 3;
|
|
nx = width - 1 + shift + src_x;
|
|
|
|
mask = 0xFF00u >> (2 * (shift + src_x));
|
|
mask_right = 0xFFu << (2 * (~nx & 3));
|
|
|
|
shift *= 2;
|
|
dst_end = dst + height * stride_dst;
|
|
do
|
|
{
|
|
const unsigned char *src_row = src;
|
|
unsigned char *dst_row = dst;
|
|
unsigned mask_row = mask >> 8;
|
|
unsigned data = 0;
|
|
|
|
for (x = nx; x >= 4; x -= 4)
|
|
{
|
|
data = (data << 8) | *src_row++;
|
|
|
|
if (mask_row & 0xFF)
|
|
{
|
|
setblock(dst_row, mask_row, data >> shift);
|
|
mask_row = 0xFF;
|
|
}
|
|
else
|
|
mask_row = mask;
|
|
|
|
dst_row++;
|
|
}
|
|
data = (data << 8) | *src_row;
|
|
setblock(dst_row, mask_row & mask_right, data >> shift);
|
|
|
|
src += stride;
|
|
dst += stride_dst;
|
|
}
|
|
while (dst < dst_end);
|
|
}
|
|
|
|
/* Draw a full native bitmap */
|
|
void lcd_bitmap(const unsigned char *src, int x, int y, int width, int height)
|
|
{
|
|
lcd_bitmap_part(src, 0, 0, width, x, y, width, height);
|
|
}
|
|
|
|
#include "lcd-bitmap-common.c"
|