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evas: filter: brightness: software brightness filter. 

SVN revision: 59067
This commit is contained in:
Brett Nash 2011-05-01 06:39:24 +00:00
parent feeb11f555
commit 370f868003
1 changed files with 51 additions and 7 deletions
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58
legacy/evas/src/lib/canvas/evas_filter.c
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@ -1152,28 +1152,72 @@ greyscale_filter(Evas_Filter_Info *info __UNUSED__, RGBA_Image *src, RGBA_Image
}
static Eina_Bool
brightness_filter(Evas_Filter_Info *info __UNUSED__, RGBA_Image *src, RGBA_Image *dst)
brightness_filter(Evas_Filter_Info *info, RGBA_Image *src, RGBA_Image *dst)
{
uint32_t *in, *out;
int i, j;
int w, h;
int a,r,g,b;
int delta;
int adjdelta;
Evas_Filter_Info_Brightness *bness;
in = src->image.data;
out = dst->image.data;
w = src->cache_entry.w;
h = src->cache_entry.h;
bness = info->data;
for (i = 0; i < h; i++)
delta = bness->adjust * 255;
if (delta > 255)
delta = 255;
else if (delta < -255)
delta = -255;
/* Note we could optimise the -255, 0 and 255 cases, but why would people
* be doing that */
if (delta >= 0)
{
for (j = 0; j < w; j++)
for (i = 0; i < h; i++)
{
for (j = 0; j < w; j++)
{
a = A_VAL(in);
r = R_VAL(in);
g = G_VAL(in);
b = B_VAL(in);
adjdelta = (a * delta) >> 8;
r = MIN(r + adjdelta, 255);
g = MIN(g + adjdelta, 255);
b = MIN(b + adjdelta, 255);
*out = ARGB_JOIN(a, r ,g, b);
out++;
in++;
}
}
}
else
{
/* Delta negative */
for (i = 0; i < h; i++)
{
// FIXME: not even implemented
out++;
in++;
for (j = 0; j < w; j++)
{
a = A_VAL(in);
r = R_VAL(in);
g = G_VAL(in);
b = B_VAL(in);
adjdelta = (a * delta) >> 8;
r = MAX(r - adjdelta, 0);
g = MAX(g - adjdelta, 0);
b = MAX(b - adjdelta, 0);
*out = ARGB_JOIN(a, r ,g, b);
out++;
in++;
}
}
}
return EINA_TRUE;
}