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Date: Tue, 30 Mar 2004 18:18:13 -0600 From: Tyler Montbriand Subject: [SDL] Detecting Opteron CPU features I can now get SDL_cpuinfo.c to detect the AMD Opteron's RDTSC, MMX, MMXEXT, 3DNOW, 3DNOWEXT, SSE, and SSE2 instruction set extensions under Linux. It took one #ifdef'ed block of new asm code to account for the 64-bit flags register, but the other two blocks worked fine without modification, just needed to modify the #ifdef's a bit.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 11 Apr 2004 19:49:34 +0000
parents e5bc29de3f0a
children 546f7c1eb755
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.TH "SDL_GetRGB" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_GetRGB\- Get RGB values from a pixel in the specified pixel format\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBvoid \fBSDL_GetRGB\fP\fR(\fBUint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b\fR);
.SH "DESCRIPTION"
.PP
Get RGB component values from a pixel stored in the specified pixel format\&.
.PP
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])\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_GetRGBA\fP\fR, \fI\fBSDL_MapRGB\fP\fR, \fI\fBSDL_MapRGBA\fP\fR, \fI\fBSDL_PixelFormat\fR\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01