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Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-01-09 23:48:26 +00:00
parent 75380fd27d
commit 6a56c14e17
13 changed files with 462 additions and 313 deletions
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17
apps/plugins/lib/grey_draw.c
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@ -601,17 +601,10 @@ void grey_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
void grey_ub_clear_display(void)
{
int value = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
unsigned char *dst = &_grey_info.data[0].value;
unsigned char *dst_end = dst + sizeof(struct grey_data)
* _GREY_MULUQ(_grey_info.width, _grey_info.height);
do
{
*dst = value;
dst += sizeof(struct grey_data);
}
while (dst < dst_end);
_grey_info.fg_val : _grey_info.bg_val;
_grey_rb->memset(_grey_info.values, value,
_GREY_MULUQ(_grey_info.width, _grey_info.height));
}
/* Draw a partial greyscale bitmap, canonical format */
@ -654,7 +647,7 @@ void grey_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
int idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (x << 2) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
unsigned char *dst_row = &_grey_info.data[idx].value;
unsigned char *dst_row = _grey_info.values + idx;
const unsigned char *src_row = src;
const unsigned char *src_end = src + width;