e1ee4ef23c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9043 a1c6a512-1295-4272-9138-f99709370657
124 lines
4 KiB
ArmAsm
124 lines
4 KiB
ArmAsm
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2006 Dave Chapman
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "pacbox.h"
|
|
|
|
.section .icode,"ax",%progbits
|
|
.global blit_display
|
|
|
|
/* void blit_display(fb_data* lcd_framebuffer, unsigned char* vbuf)
|
|
|
|
next_dst=&lcd_framebuffer[YOFS*LCD_WIDTH+XOFS+ScreenHeight-1];
|
|
for( y=ScreenHeight; y>0; y-- ) {
|
|
dst = (next_dst--);
|
|
for( x=ScreenWidth; x>0; x-- ) {
|
|
*dst = palette[*(vbuf++)];
|
|
dst+=LCD_WIDTH;
|
|
}
|
|
}
|
|
*/
|
|
|
|
#ifdef HAVE_LCD_COLOR
|
|
#if (LCD_WIDTH >= 288) && (LCD_HEIGHT >= 224)
|
|
|
|
blit_display:
|
|
stmdb sp!, {r4-r11, lr}
|
|
|
|
add r3, r0, #5696
|
|
add r3, r3, #24 @ 5720 = (2*(YOFS*LCD_WIDTH+XOFS+ScreenHeight-4))
|
|
ldr r0, =palette
|
|
mov lr, #288 @ y = 288
|
|
|
|
loop_y: mov r2, r3 @ r2 = next_dst
|
|
sub r3, r3, #8 @ next_dst-=4
|
|
|
|
mov ip, #224 @ x = 224
|
|
|
|
/* store 2 input bytes from the next four lines in r7-r10 */
|
|
loop_x:
|
|
ldrh r8, [r1, #224] @ r8 = vbuf[224]
|
|
ldrh r7, [r1] @ r7 = vbuf[0]
|
|
add r1, r1, #448
|
|
ldrh r10, [r1, #224] @ r10 = vbuf[224*3]
|
|
ldrh r9, [r1], #2 @ r9 = vbuf[224*2] ; vbuf += 2;
|
|
sub r1, r1, #448
|
|
|
|
|
|
/* Convert high bytes of r7-r10 into palette entries in r5 and r6 */
|
|
mov r6, r7, lsr #8
|
|
mov r6, r6, lsl #1
|
|
ldrh r6, [r6, r0] @ r6 = palette[hi(r7]]
|
|
|
|
mov r11, r8, lsr #8
|
|
mov r11, r11, lsl #1
|
|
ldrh r11, [r11, r0] @ r11 = palette[hi(r8]]
|
|
|
|
orr r6, r11, r6, lsl #16 @ r6 = palette[hi(r8]]
|
|
@ | (palette[hi(r7)] << 16)
|
|
|
|
mov r5, r9, lsr #8
|
|
mov r5, r5, lsl #1
|
|
ldrh r5, [r5, r0] @ r5 = palette[hi(r9]]
|
|
|
|
mov r11, r10, lsr #8
|
|
mov r11, r11, lsl #1
|
|
ldrh r11, [r11, r0] @ r11 = palette[hi(r10)]]
|
|
|
|
orr r5, r11, r5, lsl #16 @ r5 = palette[hi(r10]]
|
|
@ | (palette[hi(r9)] << 16)
|
|
|
|
/* Convert low bytes of r7-r10 into palette entries in r7 and r8 */
|
|
and r7, r7, #0xff
|
|
mov r7, r7, lsl #1
|
|
ldrh r7, [r7, r0]
|
|
|
|
and r8, r8, #0xff
|
|
mov r8, r8, lsl #1
|
|
ldrh r8, [r8, r0]
|
|
|
|
orr r8, r8, r7, lsl #16
|
|
|
|
and r9, r9, #0xff
|
|
mov r9, r9, lsl #1
|
|
ldrh r9, [r9, r0]
|
|
|
|
and r10, r10, #0xff
|
|
mov r10, r10, lsl #1
|
|
ldrh r10, [r10, r0]
|
|
|
|
orr r7, r10, r9, lsl #16
|
|
|
|
/* Now write the 8 pixels to the screen */
|
|
stmia r2!, {r7, r8}
|
|
add r2, r2, #(LCD_WIDTH*2)-8 @ dst += LCD_WIDTH
|
|
|
|
stmia r2!, {r5, r6}
|
|
add r2, r2, #(LCD_WIDTH*2)-8 @ dst += LCD_WIDTH
|
|
|
|
/* end of x loop */
|
|
subs ip, ip, #2 @ x-=2
|
|
bne loop_x
|
|
|
|
/* end of y loop */
|
|
add r1, r1, #224*3 @ vbuf += 224*3
|
|
subs lr, lr, #4 @ y-=4
|
|
ldmeqia sp!, {r4-r11, pc}
|
|
b loop_y
|
|
#endif
|
|
#endif
|