1getr(3) Allegro manual getr(3)
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6 getr, getg, getb, geta - Extract a color component from the current
7 pixel format. Allegro game programming library.
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10 #include <allegro.h>
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13 int getr(int c);
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15 int getg(int c);
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17 int getb(int c);
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19 int geta(int c);
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22 Given a color in the format being used by the current video mode, these
23 functions extract one of the red, green, blue, or alpha components
24 (ranging 0-255), calling the preceding 8, 15, 16, 24, or 32-bit get
25 functions as appropriate. The alpha part is only meaningful for 32-bit
26 pixels. Example:
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28 int r, g, b, color_value;
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30 color_value = getpixel(screen, 100, 100);
31 r = getr(color_value);
32 g = getg(color_value);
33 b = getb(color_value);
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37 getr8(3), getr_depth(3), makecol(3), set_color_depth(3), exalpha(3)
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41Allegro version 4.4.3 getr(3)