Mercurial > sdl-ios-xcode
comparison docs/man3/SDL_MapRGBA.3 @ 0:74212992fb08
Initial revision
| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Thu, 26 Apr 2001 16:45:43 +0000 |
| parents | |
| children | 55f1f1b3e27d |
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| 1 .TH "SDL_MapRGBA" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference" | |
| 2 .SH "NAME" | |
| 3 SDL_MapRGBA\- Map a RGBA color value to a pixel format\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBUint32 \fBSDL_MapRGBA\fP\fR(\fBSDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 a\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 Maps the RGBA color value to the specified pixel format and returns the pixel value as a 32-bit int\&. | |
| 12 .PP | |
| 13 If the format has a palette (8-bit) the index of the closest matching color in the palette will be returned\&. | |
| 14 .PP | |
| 15 If the specified pixel format has no alpha component the alpha value will be ignored (as it will be in formats with a palette)\&. | |
| 16 .SH "RETURN VALUE" | |
| 17 .PP | |
| 18 A pixel value best approximating the given RGBA color value for a given pixel format\&. If the pixel format bpp (color depth) is less than 32-bpp then the unused upper bits of the return value can safely be ignored (e\&.g\&., with a 16-bpp format the return value can be assigned to a \fBUint16\fP, and similarly a \fBUint8\fP for an 8-bpp format)\&. | |
| 19 .SH "SEE ALSO" | |
| 20 .PP | |
| 21 \fISDL_GetRGB\fR, \fISDL_GetRGBA\fR, \fISDL_MapRGB\fR, \fISDL_PixelFormat\fR | |
| 22 ...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04 |