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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Pacbox - a Pacman Emulator for Rockbox
*
* Based on PIE - Pacman Instructional Emulator
*
* Copyright (c) 1997-2003,2004 Alessandro Scotti
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "pacbox.h"
#include "pacbox_lcd.h"
#include "arcade.h"
#include "hardware.h"
void blit_display(fb_data* lcd_framebuffer, unsigned char* vbuf)
{
fb_data* dst;
fb_data* next_dst;
int x,y;
#ifdef HAVE_LCD_COLOR
#if LCD_SCALE==100 && LCD_ROTATE==0
/* Native resolution = 224x288 */
(void)next_dst;
dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
for (y=0;y<ScreenHeight;y++) {
for (x=0;x<ScreenWidth;x++) {
*(dst++) = palette[*(vbuf++)];
}
dst += XOFS*2;
}
#elif LCD_SCALE==100 && LCD_ROTATE==1
/* Native resolution - rotated 90 degrees = 288x224 */
next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight-1];
for( y=ScreenHeight-1; y>=0; y-- ) {
dst = (next_dst--);
for( x=0; x<ScreenWidth; x++ ) {
*dst = palette[*(vbuf++)];
dst+=LCD_WIDTH;
}
}
#elif LCD_SCALE==100 && LCD_ROTATE==2
/* Native resolution - rotated 270 degrees = 288x224 */
next_dst=&lcd_framebuffer[(LCD_HEIGHT-YOFS)*LCD_WIDTH+XOFS];
for( y=0; y<ScreenHeight; y++ ) {
dst = (next_dst++);
for( x=ScreenWidth-1; x>=0; x-- ) {
*dst = palette[*(vbuf++)];
dst-=LCD_WIDTH;
}
}
#elif LCD_SCALE==75 && LCD_ROTATE==1
/* 0.75 scaling - display 3 out of 4 pixels - rotated = 216x168
Skipping pixel #2 out of 4 seems to give the most legible display
*/
next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+((ScreenHeight*3)/4)-1];
for (y=ScreenHeight-1;y >= 0; y--) {
if ((y & 3) != 1) {
dst = (next_dst--);
for (x=0;x<ScreenWidth;x++) {
if ((x & 3) == 1) { vbuf++; }
else {
*dst = palette[*(vbuf++)];
dst+=LCD_WIDTH;
}
}
} else {
vbuf+=ScreenWidth;
}
}
#elif LCD_SCALE==75 && LCD_ROTATE==0
/* 0.75 scaling - display 3 out of 4 pixels - = 168x216
Skipping pixel #2 out of 4 seems to give the most legible display
*/
(void)next_dst;
dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
for (y=0;y<ScreenHeight;y++) {
if ((y & 3) != 1) {
for (x=0;x<ScreenWidth;x++) {
if ((x & 3) == 1) { vbuf++; }
else {
*(dst++) = palette[*(vbuf++)];
}
}
dst += XOFS*2;
} else {
vbuf+=ScreenWidth;
}
}
#elif LCD_SCALE==50 && LCD_ROTATE==1
/* 0.5 scaling - display every other pixel - rotated = 144x112 */
next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight/2-1];
for (y=(ScreenHeight/2)-1;y >= 0; y--) {
dst = (next_dst--);
for (x=0;x<ScreenWidth/2;x++) {
*dst = palette[*(vbuf)];
vbuf+=2;
dst+=LCD_WIDTH;
}
vbuf+=ScreenWidth;
}
#elif LCD_SCALE==50 && LCD_ROTATE==0
/* 0.5 scaling - display every other pixel
* LCD_HEIGHT < 144: 112x144, crop to 112x128
* else center vertically without clipping */
(void)next_dst;
dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
/* Skip first YCLIP lines */
vbuf+=ScreenWidth*YCLIP;
/* Show regular screen */
for (y=0;y<(ScreenHeight/2-YCLIP);y++) {
for (x=0;x<ScreenWidth/2;x++) {
*(dst++) = palette[*(vbuf)];
vbuf+=2;
}
dst += XOFS*2;
vbuf+=ScreenWidth;
}
#elif LCD_SCALE==40 && LCD_ROTATE==1
/* 0.4 scaling - rotated = 116x90 */
/* show 2 out of 5 pixels: 1st and 3rd anf 4th merged together */
next_dst=&lcd_framebuffer[XOFS*LCD_WIDTH+YOFS+ScreenHeight*2/5-1];
for (y=(ScreenHeight*2/5)-1;y >= 0; y--) {
dst = (next_dst--);
for (x=0;x<ScreenWidth*2/5;x++) {
*dst = palette[*(vbuf)] | palette[*(vbuf+ScreenWidth+1)];
/* every odd row number merge 2 source lines as one */
if (y & 1) *dst |= palette[*(vbuf+ScreenWidth*2)];
vbuf+=2;
dst+=LCD_WIDTH;
x++;
/* every odd column merge 2 colums together */
*dst = palette[*(vbuf)] | palette[*(vbuf+1)] |palette[*(vbuf+ScreenWidth+2)];
if (y & 1) *dst |= palette[*(vbuf+ScreenWidth*2+1)];
vbuf+=3;
dst+=LCD_WIDTH;
}
vbuf+=ScreenWidth-1;
if (y & 1) vbuf+=ScreenWidth;
}
#elif LCD_SCALE==33 && LCD_ROTATE==0
/* 1/3 scaling - display every third pixel - 75x96 */
(void)next_dst;
dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS];
for (y=0;y<ScreenHeight/3;y++) {
for (x=0;x<ScreenWidth/3;x++) {
*(dst++) = palette[*(vbuf)]
| palette[*(vbuf+ScreenWidth+1)]
| palette[*(vbuf+ScreenWidth*2+2)];
vbuf+=3;
}
dst += XOFS*2;
vbuf+=ScreenWidth*2+2;
}
#endif
#else /* Greyscale LCDs */
#if LCD_SCALE==50 && LCD_ROTATE==1
#if LCD_PIXELFORMAT == VERTICAL_PACKING
/* 0.5 scaling - display every other pixel = 144x112 */
next_dst=&lcd_framebuffer[YOFS/4*LCD_WIDTH+XOFS+ScreenHeight/2-1];
for (y=(ScreenHeight/2)-1;y >= 0; y--) {
dst = (next_dst--);
for (x=0;x<ScreenWidth/8;x++) {
*dst = (palette[*(vbuf+6)]<<6) | (palette[*(vbuf+4)] << 4) | (palette[*(vbuf+2)] << 2) | palette[*(vbuf)];
vbuf+=8;
dst+=LCD_WIDTH;
}
vbuf+=ScreenWidth;
}
#endif /* Vertical Packing */
#endif /* scale 50% rotated */
#endif /* Not Colour */
}
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