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XLCD lib: * Fix bug (improper fill) in pixel-wise left scrolling on 2bpp horizontally packed LCDs. * Faster pixel-wise upward scrolling on 2bpp vertically packed LCD coldfire targets.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23704 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2009-11-22 14:48:50 +00:00
parent 48df607faa
commit 728f698fa1
1 changed files with 3 additions and 6 deletions
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9
apps/plugins/lib/xlcd_scroll.c
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@ -171,7 +171,7 @@ void xlcd_scroll_left(int count)
int bx, y;
unsigned char *addr = rb->lcd_framebuffer + blocklen;
#if LCD_DEPTH == 2
unsigned fill = 0x55 * (~rb->lcd_get_background() & 3);
unsigned fill = (0x55 * (~rb->lcd_get_background() & 3)) << bitcount;
#endif
for (y = 0; y < LCD_HEIGHT; y++)
@ -479,12 +479,9 @@ void xlcd_scroll_up(int count)
".su_iloop: \n" /* repeat for all rows */
"sub.l %[wide],%%a1\n" /* address -= width */
"clr.l %%d0 \n"
"move.b (%%a1),%%d0 \n" /* get data byte */
"lsl.l #8,%%d1 \n" /* old data to 2nd byte */
"or.l %%d1,%%d0 \n" /* combine old data */
"clr.l %%d1 \n"
"move.b %%d0,%%d1 \n" /* keep data for next round */
"move.b (%%a1),%%d1 \n" /* combine with new data byte */
"move.l %%d1,%%d0 \n" /* keep data for next round */
"lsr.l %[cnt],%%d0 \n" /* shift right */
"move.b %%d0,(%%a1) \n" /* store data */