1makeacol32(3) Allegro manual makeacol32(3)
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6 makeacol32 - Converts an RGBA color into a 32-bit display pixel format.
7 Allegro game programming library.
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10 #include <allegro.h>
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13 int makeacol32(int r, int g, int b, int a);
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16 Converts an RGBA color into a 32-bit display pixel format, which
17 includes an alpha (transparency) value. There are no versions of this
18 routine for other color depths, because only the 32-bit format has
19 enough room to store a proper alpha channel. You should only use RGBA
20 format colors as the input to draw_trans_sprite() or
21 draw_trans_rle_sprite() after calling set_alpha_blender(), rather than
22 drawing them directly to the screen.
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26 makeacol(3), set_alpha_blender(3), set_write_alpha_blender(3)
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30Allegro version 4.4.3 makeacol32(3)