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getr.3alleg
Langue: en
Version: version 4.2.2 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
getr, getg, getb, geta - Extract a color component from the current pixel format. Allegro game programming library.SYNOPSIS
#include <allegro.h>int getr(int c);
int getg(int c);
int getb(int c);
int geta(int c);
DESCRIPTION
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);
SEE ALSO
getr8(3alleg), getr_depth(3alleg), makecol(3alleg), set_color_depth(3alleg), exalpha(3alleg)Contenus ©2006-2024 Benjamin Poulain
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