enlightenment/ephoto
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ephoto
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Fix the alpha issues with grayscale and sepia conversions, thanks 

rasties and rephorm


SVN revision: 30357
This commit is contained in:
titan 2007-06-17 03:21:51 +00:00 committed by titan
parent 6bdde18103
commit aaab7ef651
1 changed files with 23 additions and 0 deletions
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23
src/bin/ephoto_imaging.c
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@ -290,7 +290,16 @@ unsigned int *grayscale_image(Ewl_Widget *image)
r = (int)((im_data[i] >> 16) & 0xff);
a = (int)((im_data[i] >> 24) & 0xff);
if (a > 0 && a < 255)
{
b = b * (255 / a);
g = g * (255 / a);
r = r * (255 / a);
}
gray = (int)((0.3 * r) + (0.59 * g) + (0.11 * b));
if (a >= 0 && a < 255) gray = (gray * a) / 255;
im_data_new[i] = (a << 24) | (gray << 16) | (gray << 8) | gray;
}
@ -313,6 +322,13 @@ unsigned int *sepia_image(Ewl_Widget *image)
g = (int)((im_data[i] >> 8) & 0xff);
r = (int)((im_data[i] >> 16) & 0xff);
a = (int)((im_data[i] >> 24) & 0xff);
if (a > 0 && a < 255)
{
b = b * (255 / a);
g = g * (255 / a);
r = r * (255 / a);
}
rr = (int)(((r + g + b)/3)+40);
if (rr < 0) rr = 0;
@ -324,6 +340,13 @@ unsigned int *sepia_image(Ewl_Widget *image)
if (bb < 0) bb = 0;
if (bb > 255) bb = 255;
if (a >= 0 && a < 255)
{
rr = (rr * a) / 255;
gg = (gg * a) / 255;
bb = (bb * a) / 255;
}
im_data_new[i] = (a << 24) | (rr << 16) | (gg << 8) | bb;
}
return im_data_new;