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Quack 2
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Literally A Penguin
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linux/gl_fxmesa.c
Normal file
206
linux/gl_fxmesa.c
Normal file
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/*
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** GLW_IMP.C
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**
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** This file contains ALL Linux specific stuff having to do with the
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** OpenGL refresh. When a port is being made the following functions
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** must be implemented by the port:
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**
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** GLimp_EndFrame
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** GLimp_Init
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** GLimp_Shutdown
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** GLimp_SwitchFullscreen
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**
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*/
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/vt.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <signal.h>
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#include "../ref_gl/gl_local.h"
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#include "../client/keys.h"
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#include "../linux/rw_linux.h"
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#include <GL/fxmesa.h>
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/*****************************************************************************/
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static qboolean GLimp_SwitchFullscreen( int width, int height );
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qboolean GLimp_InitGL (void);
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extern cvar_t *vid_fullscreen;
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extern cvar_t *vid_ref;
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static fxMesaContext fc = NULL;
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#define NUM_RESOLUTIONS 3
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static resolutions[NUM_RESOLUTIONS][3]={
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{ 512, 384, GR_RESOLUTION_512x384 },
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{ 640, 400, GR_RESOLUTION_640x400 },
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{ 640, 480, GR_RESOLUTION_640x480 }
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};
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static int findres(int *width, int *height)
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{
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int i;
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for(i=0;i<NUM_RESOLUTIONS;i++)
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if((*width<=resolutions[i][0]) && (*height<=resolutions[i][1])) {
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*width = resolutions[i][0];
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*height = resolutions[i][1];
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return resolutions[i][2];
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}
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*width = 640;
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*height = 480;
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return GR_RESOLUTION_640x480;
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}
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static void signal_handler(int sig)
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{
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printf("Received signal %d, exiting...\n", sig);
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GLimp_Shutdown();
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_exit(0);
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}
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static void InitSig(void)
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{
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signal(SIGHUP, signal_handler);
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signal(SIGQUIT, signal_handler);
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signal(SIGILL, signal_handler);
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signal(SIGTRAP, signal_handler);
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signal(SIGIOT, signal_handler);
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signal(SIGBUS, signal_handler);
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signal(SIGFPE, signal_handler);
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signal(SIGSEGV, signal_handler);
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signal(SIGTERM, signal_handler);
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}
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/*
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** GLimp_SetMode
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*/
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int GLimp_SetMode( int *pwidth, int *pheight, int mode, qboolean fullscreen )
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{
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int width, height;
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GLint attribs[32];
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ri.Con_Printf( PRINT_ALL, "Initializing OpenGL display\n");
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ri.Con_Printf (PRINT_ALL, "...setting mode %d:", mode );
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if ( !ri.Vid_GetModeInfo( &width, &height, mode ) )
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{
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ri.Con_Printf( PRINT_ALL, " invalid mode\n" );
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return rserr_invalid_mode;
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}
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ri.Con_Printf( PRINT_ALL, " %d %d\n", width, height );
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// destroy the existing window
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GLimp_Shutdown ();
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// set fx attribs
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attribs[0] = FXMESA_DOUBLEBUFFER;
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attribs[1] = FXMESA_ALPHA_SIZE;
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attribs[2] = 1;
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attribs[3] = FXMESA_DEPTH_SIZE;
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attribs[4] = 1;
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attribs[5] = FXMESA_NONE;
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fc = fxMesaCreateContext(0, findres(&width, &height), GR_REFRESH_75Hz,
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attribs);
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if (!fc)
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return rserr_invalid_mode;
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*pwidth = width;
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*pheight = height;
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// let the sound and input subsystems know about the new window
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ri.Vid_NewWindow (width, height);
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fxMesaMakeCurrent(fc);
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return rserr_ok;
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}
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/*
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** GLimp_Shutdown
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**
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** This routine does all OS specific shutdown procedures for the OpenGL
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** subsystem. Under OpenGL this means NULLing out the current DC and
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** HGLRC, deleting the rendering context, and releasing the DC acquired
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** for the window. The state structure is also nulled out.
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**
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*/
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void GLimp_Shutdown( void )
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{
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if (fc) {
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fxMesaDestroyContext(fc);
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fc = NULL;
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}
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}
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/*
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** GLimp_Init
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**
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** This routine is responsible for initializing the OS specific portions
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** of OpenGL.
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*/
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int GLimp_Init( void *hinstance, void *wndproc )
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{
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InitSig();
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return true;
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}
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/*
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** GLimp_BeginFrame
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*/
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void GLimp_BeginFrame( float camera_seperation )
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{
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}
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/*
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** GLimp_EndFrame
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**
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** Responsible for doing a swapbuffers and possibly for other stuff
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** as yet to be determined. Probably better not to make this a GLimp
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** function and instead do a call to GLimp_SwapBuffers.
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*/
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void GLimp_EndFrame (void)
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{
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glFlush();
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fxMesaSwapBuffers();
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}
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/*
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** GLimp_AppActivate
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*/
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void GLimp_AppActivate( qboolean active )
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{
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}
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extern void gl3DfxSetPaletteEXT(GLuint *pal);
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void Fake_glColorTableEXT( GLenum target, GLenum internalformat,
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GLsizei width, GLenum format, GLenum type,
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const GLvoid *table )
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{
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byte temptable[256][4];
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byte *intbl;
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int i;
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for (intbl = (byte *)table, i = 0; i < 256; i++) {
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temptable[i][2] = *intbl++;
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temptable[i][1] = *intbl++;
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temptable[i][0] = *intbl++;
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temptable[i][3] = 255;
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}
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gl3DfxSetPaletteEXT((GLuint *)temptable);
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}
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