106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
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/***************************************************************************
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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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* Pacbox - a Pacman Emulator for Rockbox
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*
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* Based on PIE - Pacman Instructional Emulator
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*
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* Copyright (c) 1997-2003,2004 Alessandro Scotti
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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 "pacbox.h"
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#include "pacbox_lcd.h"
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#include "arcade.h"
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#include "hardware.h"
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void blit_display(fb_data* lcd_framebuffer, unsigned char* vbuf)
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{
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fb_data* dst;
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fb_data* next_dst;
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int x,y;
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#ifdef HAVE_LCD_COLOR
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#if (LCD_WIDTH >= 224) && (LCD_HEIGHT >= 288)
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/* Native resolution = 224x288 */
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(void)next_dst;
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dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
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for (y=0;y<ScreenHeight;y++) {
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for (x=0;x<ScreenWidth;x++) {
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*(dst++) = palette[*(vbuf++)];
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}
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dst += XOFS*2;
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}
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#elif (LCD_WIDTH >= 288) && (LCD_HEIGHT >= 224)
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/* Native resolution - rotated 90 degrees = 288x224 */
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next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight-1];
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for( y=ScreenHeight-1; y>=0; y-- ) {
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dst = (next_dst--);
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for( x=0; x<ScreenWidth; x++ ) {
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*dst = palette[*(vbuf++)];
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dst+=LCD_WIDTH;
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}
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}
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#elif (LCD_WIDTH >= 216) && (LCD_HEIGHT >= 168)
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/* 0.75 scaling - display 3 out of 4 pixels = 216x168
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Skipping pixel #2 out of 4 seems to give the most legible display
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*/
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next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+((ScreenHeight*3)/4)-1];
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for (y=ScreenHeight-1;y >= 0; y--) {
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if ((y & 3) != 1) {
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dst = (next_dst--);
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for (x=0;x<ScreenWidth;x++) {
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if ((x & 3) == 1) { vbuf++; }
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else {
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*dst = palette[*(vbuf++)];
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dst+=LCD_WIDTH;
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}
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}
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} else {
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vbuf+=ScreenWidth;
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}
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}
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#elif (LCD_WIDTH >= 144) && (LCD_HEIGHT >= 112)
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/* 0.5 scaling - display every other pixel = 144x112 */
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next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight/2-1];
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for (y=(ScreenHeight/2)-1;y >= 0; y--) {
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dst = (next_dst--);
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for (x=0;x<ScreenWidth/2;x++) {
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*dst = palette[*(vbuf)];
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vbuf+=2;
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dst+=LCD_WIDTH;
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}
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vbuf+=ScreenWidth;
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}
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#endif
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#else /* Greyscale LCDs */
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#if (LCD_WIDTH >= 144) && (LCD_HEIGHT >= 112)
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#if LCD_PIXELFORMAT == VERTICAL_PACKING
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/* 0.5 scaling - display every other pixel = 144x112 */
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next_dst=&lcd_framebuffer[YOFS/4*LCD_WIDTH+XOFS+ScreenHeight/2-1];
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for (y=(ScreenHeight/2)-1;y >= 0; y--) {
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dst = (next_dst--);
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for (x=0;x<ScreenWidth/8;x++) {
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*dst = (palette[*(vbuf+6)]<<6) | (palette[*(vbuf+4)] << 4) | (palette[*(vbuf+2)] << 2) | palette[*(vbuf)];
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vbuf+=8;
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dst+=LCD_WIDTH;
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}
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vbuf+=ScreenWidth;
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}
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#endif /* Vertical Packing */
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#endif /* Size >= 144x112 */
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#endif /* Not Colour */
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}
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