Mercurial > sdl-ios-xcode
comparison docs/man3/SDL_GetRGBA.3 @ 0:74212992fb08
Initial revision
author | Sam Lantinga <slouken@lokigames.com> |
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date | Thu, 26 Apr 2001 16:45:43 +0000 |
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children | 55f1f1b3e27d |
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1 .TH "SDL_GetRGBA" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference" | |
2 .SH "NAME" | |
3 SDL_GetRGBA\- Get RGBA values from a pixel in the specified pixel format\&. | |
4 .SH "SYNOPSIS" | |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBvoid \fBSDL_GetRGBA\fP\fR(\fBUint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a\fR); | |
9 .SH "DESCRIPTION" | |
10 .PP | |
11 Get RGBA component values from a pixel stored in the specified pixel format\&. | |
12 .PP | |
13 This function uses the entire 8-bit [0\&.\&.255] range when converting color components from pixel formats with less than 8-bits per RGB component (e\&.g\&., a completely white pixel in 16-bit RGB565 format would return [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8])\&. | |
14 .PP | |
15 If the surface has no alpha component, the alpha will be returned as 0xff (100% opaque)\&. | |
16 .SH "SEE ALSO" | |
17 .PP | |
18 \fISDL_GetRGB\fR, \fISDL_MapRGB\fR, \fISDL_MapRGBA\fR, \fISDL_PixelFormat\fR | |
19 ...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04 |