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| bitmap_mask_color(3) | Allegro manual | bitmap_mask_color(3) |
NAME
bitmap_mask_color - Returns the mask color of the specified bitmap. Allegro game programming library.SYNOPSIS
#include <allegro.h>int bitmap_mask_color(BITMAP *bmp);
DESCRIPTION
Returns the mask color for the specified bitmap (the value which is skipped when drawing sprites). For 256-color bitmaps this is zero, and for truecolor bitmaps it is bright pink (maximum red and blue, zero green). A frequent use of this function is to clear a bitmap with the mask color so you can later use this bitmap with masked_blit() or draw_sprite() after drawing other stuff on it. Example:
/* Replace mask color with another color. */
for (y = 0; y h; y++)
for (x = 0; x w; x++)
if (getpixel(bmp, x, y) == bitmap_mask_color(bmp))
putpixel(bmp, x, y, another_color);
SEE ALSO
MASK_COLOR_8(3), set_color_depth(3), bitmap_color_depth(3), ex3d(3), exmouse(3), expat(3)| version 4.4.3 | Allegro |
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