geta_depth

Extract a color component from a color in a specified pixel format.

Description

int geta_depth(int color_depth, int c);
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);
See Also:
Examples using this:

Related Projects

The following projects include source code containing this keyword: