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Grayscale library: LCD linearisation and gamma correction.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10402 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-08-02 00:22:01 +00:00
parent 8cc73f152b
commit 628d20a610
11 changed files with 251 additions and 48 deletions
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37
apps/plugins/lib/gray_draw.c
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@ -32,12 +32,12 @@
static void setpixel(unsigned char *address)
{
*address = _gray_info.fg_brightness;
*address = _gray_info.fg_index;
}
static void clearpixel(unsigned char *address)
{
*address = _gray_info.bg_brightness;
*address = _gray_info.bg_index;
}
static void flippixel(unsigned char *address)
@ -61,7 +61,7 @@ void (* const _gray_pixelfuncs[8])(unsigned char *address) = {
void gray_clear_display(void)
{
int brightness = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_brightness : _gray_info.bg_brightness;
_gray_info.fg_index : _gray_info.bg_index;
_gray_rb->memset(_gray_info.cur_buffer, brightness,
MULU16(_gray_info.width, _gray_info.height));
@ -219,7 +219,7 @@ void gray_vline(int x, int y1, int y2)
if (_gray_info.drawmode & DRMODE_BG)
{
fillopt = true;
bits = _gray_info.bg_brightness;
bits = _gray_info.bg_index;
}
}
else
@ -227,7 +227,7 @@ void gray_vline(int x, int y1, int y2)
if (_gray_info.drawmode & DRMODE_FG)
{
fillopt = true;
bits = _gray_info.fg_brightness;
bits = _gray_info.fg_index;
}
}
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
@ -293,7 +293,7 @@ void gray_fillrect(int x, int y, int width, int height)
if (_gray_info.drawmode & DRMODE_BG)
{
fillopt = true;
bits = _gray_info.bg_brightness;
bits = _gray_info.bg_index;
}
}
else
@ -301,7 +301,7 @@ void gray_fillrect(int x, int y, int width, int height)
if (_gray_info.drawmode & DRMODE_FG)
{
fillopt = true;
bits = _gray_info.fg_brightness;
bits = _gray_info.fg_index;
}
}
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
@ -525,8 +525,7 @@ void gray_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
dst_end = dst_col + height;
do
{
unsigned data = MULU16(_gray_info.depth, *src_col) + 127;
*dst_col++ = (data + (data >> 8)) >> 8; /* approx. data / 255 */
*dst_col++ = _gray_info.idxtable[*src_col];
src_col += stride;
}
while (dst_col < dst_end);
@ -642,13 +641,8 @@ static void _writearray(unsigned char *address, const unsigned char *src,
"mov.b @%[src],r0 \n" /* load src byte */
"extu.b r0,r0 \n" /* extend unsigned */
"mulu %[dpth],r0 \n" /* macl = byte * depth; */
"sts macl,r1 \n" /* r1 = macl; */
"add #127,r1 \n" /* byte += 127; */
"mov r1,r0 \n"
"shlr8 r1 \n"
"add r1,r0 \n" /* byte += byte >> 8; */
"shlr8 r0 \n" /* byte >>= 8; */
"mov.b @(r0,%[trns]),r0\n" /* idxtable into pattern index */
"extu.b r0,r0 \n" /* extend unsigned */
"shll2 r0 \n"
"mov.l @(r0,%[bpat]),r4\n" /* r4 = bitpattern[byte]; */
@ -693,7 +687,8 @@ static void _writearray(unsigned char *address, const unsigned char *src,
[stri]"r"(stride),
[dpth]"r"(_gray_info.depth),
[bpat]"r"(_gray_info.bitpattern),
[rmsk]"r"(_gray_info.randmask)
[rmsk]"r"(_gray_info.randmask),
[trns]"r"(_gray_info.idxtable)
: /* clobbers */
"r0", "r1", "r3", "r4", "r5", "macl", "pr"
);
@ -811,12 +806,7 @@ static void _writearray(unsigned char *address, const unsigned char *src,
"clr.l %%d0 \n"
"move.b (%[src]),%%d0 \n" /* load src byte */
"mulu.w %[dpth],%%d0\n" /* byte = byte * depth; */
"add.l #127,%%d0 \n" /* byte += 127; */
"move.l %%d0,%%d1 \n"
"lsr.l #8,%%d1 \n"
"add.l %%d1,%%d0 \n" /* byte += byte >> 8; */
"lsr.l #8,%%d0 \n" /* byte >>= 8; */
"move.b (%%d0:l:1,%[trns]),%%d0\n" /* idxtable into pattern index */
"move.l (%%d0:l:4,%[bpat]),%%d2\n" /* d2 = bitpattern[byte]; */
"mulu.w #75,%[rnd] \n" /* multiply by 75 */
@ -852,6 +842,7 @@ static void _writearray(unsigned char *address, const unsigned char *src,
: /* inputs */
[stri]"r"(stride),
[bpat]"a"(_gray_info.bitpattern),
[trns]"a"(_gray_info.idxtable),
[dpth]"d"(_gray_info.depth),
[rmsk]"d"(_gray_info.randmask)
: /* clobbers */