Source to 321/linux/gl_fxmesa.c
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
** GLW_IMP.C
**
** This file contains ALL Linux specific stuff having to do with the
** OpenGL refresh. When a port is being made the following functions
** must be implemented by the port:
**
** GLimp_EndFrame
** GLimp_Init
** GLimp_Shutdown
** GLimp_SwitchFullscreen
**
*/
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/vt.h>
#include <stdarg.h>
#include <stdio.h>
#include <signal.h>
#include "../ref_gl/gl_local.h"
#include "../client/keys.h"
#include "../linux/rw_linux.h"
#include "../linux/glw_linux.h"
#include <GL/fxmesa.h>
/*****************************************************************************/
glwstate_t glw_state;
static qboolean GLimp_SwitchFullscreen( int width, int height );
qboolean GLimp_InitGL (void);
extern cvar_t *vid_fullscreen;
extern cvar_t *vid_ref;
static fxMesaContext fc = NULL;
#define NUM_RESOLUTIONS 16
static resolutions[NUM_RESOLUTIONS][3]={
{ 320,200, GR_RESOLUTION_320x200 },
{ 320,240, GR_RESOLUTION_320x240 },
{ 400,256, GR_RESOLUTION_400x256 },
{ 400,300, GR_RESOLUTION_400x300 },
{ 512,384, GR_RESOLUTION_512x384 },
{ 640,200, GR_RESOLUTION_640x200 },
{ 640,350, GR_RESOLUTION_640x350 },
{ 640,400, GR_RESOLUTION_640x400 },
{ 640,480, GR_RESOLUTION_640x480 },
{ 800,600, GR_RESOLUTION_800x600 },
{ 960,720, GR_RESOLUTION_960x720 },
{ 856,480, GR_RESOLUTION_856x480 },
{ 512,256, GR_RESOLUTION_512x256 },
{ 1024,768, GR_RESOLUTION_1024x768 },
{ 1280,1024,GR_RESOLUTION_1280x1024 },
{ 1600,1200,GR_RESOLUTION_1600x1200 }
};
static int findres(int *width, int *height)
{
int i;
for(i=0;i<NUM_RESOLUTIONS;i++)
if((*width<=resolutions[i][0]) && (*height<=resolutions[i][1])) {
*width = resolutions[i][0];
*height = resolutions[i][1];
return resolutions[i][2];
}
*width = 640;
*height = 480;
return GR_RESOLUTION_640x480;
}
static void signal_handler(int sig)
{
printf("Received signal %d, exiting...\n", sig);
GLimp_Shutdown();
_exit(0);
}
static void InitSig(void)
{
signal(SIGHUP, signal_handler);
signal(SIGQUIT, signal_handler);
signal(SIGILL, signal_handler);
signal(SIGTRAP, signal_handler);
signal(SIGIOT, signal_handler);
signal(SIGBUS, signal_handler);
signal(SIGFPE, signal_handler);
signal(SIGSEGV, signal_handler);
signal(SIGTERM, signal_handler);
}
/*
** GLimp_SetMode
*/
int GLimp_SetMode( int *pwidth, int *pheight, int mode, qboolean fullscreen )
{
int width, height;
GLint attribs[32];
ri.Con_Printf( PRINT_ALL, "Initializing OpenGL display\n");
ri.Con_Printf (PRINT_ALL, "...setting mode %d:", mode );
if ( !ri.Vid_GetModeInfo( &width, &height, mode ) )
{
ri.Con_Printf( PRINT_ALL, " invalid mode\n" );
return rserr_invalid_mode;
}
ri.Con_Printf( PRINT_ALL, " %d %d\n", width, height );
// destroy the existing window
GLimp_Shutdown ();
// set fx attribs
attribs[0] = FXMESA_DOUBLEBUFFER;
attribs[1] = FXMESA_ALPHA_SIZE;
attribs[2] = 1;
attribs[3] = FXMESA_DEPTH_SIZE;
attribs[4] = 1;
attribs[5] = FXMESA_NONE;
fc = qfxMesaCreateContext(0, findres(&width, &height), GR_REFRESH_75Hz,
attribs);
if (!fc)
return rserr_invalid_mode;
*pwidth = width;
*pheight = height;
// let the sound and input subsystems know about the new window
ri.Vid_NewWindow (width, height);
qfxMesaMakeCurrent(fc);
return rserr_ok;
}
/*
** GLimp_Shutdown
**
** This routine does all OS specific shutdown procedures for the OpenGL
** subsystem. Under OpenGL this means NULLing out the current DC and
** HGLRC, deleting the rendering context, and releasing the DC acquired
** for the window. The state structure is also nulled out.
**
*/
void GLimp_Shutdown( void )
{
if (fc) {
qfxMesaDestroyContext(fc);
fc = NULL;
}
}
/*
** GLimp_Init
**
** This routine is responsible for initializing the OS specific portions
** of OpenGL.
*/
int GLimp_Init( void *hinstance, void *wndproc )
{
InitSig();
return true;
}
/*
** GLimp_BeginFrame
*/
void GLimp_BeginFrame( float camera_seperation )
{
}
/*
** GLimp_EndFrame
**
** Responsible for doing a swapbuffers and possibly for other stuff
** as yet to be determined. Probably better not to make this a GLimp
** function and instead do a call to GLimp_SwapBuffers.
*/
void GLimp_EndFrame (void)
{
qglFlush();
qfxMesaSwapBuffers();
}
/*
** GLimp_AppActivate
*/
void GLimp_AppActivate( qboolean active )
{
}
void Fake_glColorTableEXT( GLenum target, GLenum internalformat,
GLsizei width, GLenum format, GLenum type,
const GLvoid *table )
{
byte temptable[256][4];
byte *intbl;
int i;
for (intbl = (byte *)table, i = 0; i < 256; i++) {
temptable[i][2] = *intbl++;
temptable[i][1] = *intbl++;
temptable[i][0] = *intbl++;
temptable[i][3] = 255;
}
qglEnable( GL_SHARED_TEXTURE_PALETTE_EXT );
qgl3DfxSetPaletteEXT((GLuint *)temptable);
}