Extract a color component from the current pixel format.


int geta(int c);
Given a color in the format being used by the current video mode, these functions extract one of the red, green, blue, or alpha components (ranging 0-255), calling the preceding 8, 15, 16, 24, or 32-bit get functions as appropriate. The alpha part is only meaningful for 32-bit pixels. Example:
      int r, g, b, color_value;

color_value = getpixel(screen, 100, 100); r = getr(color_value); g = getg(color_value); b = getb(color_value);
Examples using this:

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