---
name: "getr8"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/getr8/3alleg4"
---

# getr8(3alleg4)

Extract a color component from the specified pixel format. Allegro game programming library.

## NAME

getr8, getg8, getb8, getr15, getg15, getb15, getr16, getg16, getb16, getr24, getg24, getb24, getr32, getg32, getb32 - Extract a color component from the specified pixel format. Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**int getr8(int c);**

**int getg8(int c);**

**int getb8(int c);**

**int getr15(int c);**

**int getg15(int c);**

**int getb15(int c);**

**int getr16(int c);**

**int getg16(int c);**

**int getb16(int c);**

**int getr24(int c);**

**int getg24(int c);**

**int getb24(int c);**

**int getr32(int c);**

**int getg32(int c);**

**int getb32(int c);**

## DESCRIPTION

Given a color in a display dependent format, these functions extract one  of the red, green, or blue components (ranging 0-255). Example:

```
   int r, g, b, color_value;
   color_value = _getpixel15(screen, 100, 100);
   r = getr15(color_value);
   g = getg15(color_value);
   b = getb15(color_value);
```

## SEE ALSO

**geta32**(3alleg4), **getr**(3alleg4), **getr\_depth**(3alleg4), **makecol**(3alleg4), **set\_color\_depth**(3alleg4)