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Greyscale library: * Introduced some extra macros dealing with block size, allowing to write some parts with less #ifdefing. * Optimised grey_update_rect() for horizontally packed LCDs, and unbuffered scrolling.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16050 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-01-10 22:51:33 +00:00
parent 12cc3cc47c
commit df5c3e15e8
4 changed files with 169 additions and 186 deletions
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60
apps/plugins/lib/grey_core.c
View file

@ -373,7 +373,10 @@ bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
return false;
#ifndef SIMULATOR
/* Init to white */
_grey_rb->memset(_grey_info.values, 0x80, plane_size);
/* Init phases with random bits */
dst = (unsigned*)(_grey_info.phases);
end = (unsigned*)(_grey_info.phases + plane_size);
@ -516,7 +519,7 @@ void grey_update_rect(int x, int y, int width, int height)
void grey_update_rect(int x, int y, int width, int height)
{
unsigned char *src;
unsigned char *src, *dst;
if ((width <= 0) || (height <= 0))
return; /* nothing to do */
@ -527,26 +530,31 @@ void grey_update_rect(int x, int y, int width, int height)
width = _grey_info.width - x;
src = _grey_info.buffer + _GREY_MULUQ(_grey_info.width, y) + x;
do
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
int idx = _GREY_MULUQ(_grey_info.width, y) + x;
#else
#if LCD_DEPTH == 1
int idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (x << 3) + (~y & 7);
#elif LCD_DEPTH == 2
int idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (x << 2) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
unsigned char *dst_row = _grey_info.values + idx;
dst = _grey_info.values + _GREY_MULUQ(_grey_info.width, y) + x;
do
{
_grey_rb->memcpy(dst, src, width);
dst += _grey_info.width;
src += _grey_info.width;
}
while (--height > 0);
#else /* LCD_PIXELFORMAT == VRTICAL_PACKING */
do
{
unsigned char *src_row = src;
unsigned char *src_end = src + width;
dst = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, y & ~_GREY_BMASK)
+ (x << _GREY_BSHIFT) + (~y & _GREY_BMASK);
do
{
*dst_row = *src_row++;
dst_row += _GREY_X_ADVANCE;
*dst = *src_row++;
dst += _GREY_BSIZE;
}
while (src_row < src_end);
@ -554,6 +562,8 @@ void grey_update_rect(int x, int y, int width, int height)
src += _grey_info.width;
}
while (--height > 0);
#endif /* LCD_PIXELFORMAT */
}
#endif /* !SIMULATOR */
@ -687,18 +697,12 @@ static void grey_screendump_hook(int fd)
#ifdef SIMULATOR
unsigned char *src = _grey_info.buffer
+ _GREY_MULUQ(_grey_info.width, gy) + gx;
for (i = 0; i < 4; i++)
linebuf[x + i] = BMP_FIXEDCOLORS + *src++;
#else
unsigned char *src = _grey_info.values
+ _GREY_MULUQ(_grey_info.width, gy) + gx;
for (i = 0; i < 4; i++)
{
linebuf[x + i] = BMP_FIXEDCOLORS + *src;
src += _GREY_X_ADVANCE;
}
#endif
for (i = 0; i < 4; i++)
linebuf[x + i] = BMP_FIXEDCOLORS + *src++;
}
else
{
@ -730,7 +734,9 @@ static void grey_screendump_hook(int fd)
#else
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.values[_GREY_MULUQ(_grey_info.width,
gy & ~7) + (gx << 3) + (~gy & 7)];
gy & ~_GREY_BMASK)
+ (gx << _GREY_BSHIFT)
+ (~gy & _GREY_BMASK)];
#endif
}
else
@ -757,7 +763,9 @@ static void grey_screendump_hook(int fd)
#else
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.values[_GREY_MULUQ(_grey_info.width,
gy & ~3) + (gx << 2) + (~gy & 3)];
gy & ~_GREY_BMASK)
+ (gx << _GREY_BSHIFT)
+ (~gy & _GREY_BMASK)];
#endif
}
else