geta_depth
Extract a color component from a color in a specified pixel format.
Description
Given a color in the format being used by the specified color depth,
these functions extract one of the red, green, blue, or alpha components
(ranging 0-255). The alpha part is only meaningful for 32-bit pixels.
Example:
int r, g, b, color_value, bpp;
bpp = bitmap_color_depth(bitmap);
color_value = getpixel(bitmap, 100, 100);
r = getr_depth(bpp, color_value);
g = getg_depth(bpp, color_value);
b = getb_depth(bpp, color_value);
Related Projects
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