179 lines
3.9 KiB
C
179 lines
3.9 KiB
C
/*
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vid_sdl.c
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Video driver for Sam Lantinga's Simple DirectMedia Layer
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include <SDL.h>
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#include "QF/console.h"
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#include "QF/cvar.h"
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#include "QF/qendian.h"
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#include "QF/sys.h"
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#include "QF/vid.h"
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#include "context_sdl.h"
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#include "d_iface.h"
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#include "vid_internal.h"
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#include "vid_gl.h"
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// Define GLAPIENTRY to a useful value
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#ifndef GLAPIENTRY
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# ifdef _WIN32
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# include <windows.h>
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# define GLAPIENTRY WINAPI
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# undef LoadImage
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# else
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# ifdef APIENTRY
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# define GLAPIENTRY APIENTRY
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# else
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# define GLAPIENTRY
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# endif
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# endif
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#endif
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static void (GLAPIENTRY *qfglFinish) (void);
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static int use_gl_procaddress = 0;
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static cvar_t *gl_driver;
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static void *
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QFGL_ProcAddress (const char *name, qboolean crit)
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{
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void *glfunc = NULL;
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Sys_MaskPrintf (SYS_VID, "DEBUG: Finding symbol %s ... ", name);
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glfunc = SDL_GL_GetProcAddress (name);
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if (glfunc) {
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Sys_MaskPrintf (SYS_VID, "found [%p]\n", glfunc);
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return glfunc;
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}
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Sys_MaskPrintf (SYS_VID, "not found\n");
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if (crit) {
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if (strncmp ("fxMesa", name, 6) == 0) {
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Sys_Printf ("This target requires a special version of Mesa with "
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"support for Glide and SVGAlib.\n");
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Sys_Printf ("If you are in X, try using a GLX or SGL target.\n");
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}
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Sys_Error ("Couldn't load critical OpenGL function %s, exiting...",
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name);
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}
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return NULL;
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}
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static void
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sdlgl_set_vid_mode (gl_ctx_t *ctx)
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{
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int i, j;
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sdl_flags |= SDL_OPENGL;
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// Setup GL Attributes
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SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
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// SDL_GL_SetAttribute (SDL_GL_STENCIL_SIZE, 0); // Try for 0, 8
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// SDL_GL_SetAttribute (SDL_GL_STEREO, 1); // Someday...
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for (i = 0; i < 5; i++) {
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int k;
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int color[5] = {32, 24, 16, 15, 0};
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int rgba[5][4] = {
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{8, 8, 8, 0},
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{8, 8, 8, 8},
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{5, 6, 5, 0},
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{5, 5, 5, 0},
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{5, 5, 5, 1},
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};
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SDL_GL_SetAttribute (SDL_GL_RED_SIZE, rgba[i][0]);
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SDL_GL_SetAttribute (SDL_GL_GREEN_SIZE, rgba[i][1]);
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SDL_GL_SetAttribute (SDL_GL_BLUE_SIZE, rgba[i][2]);
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SDL_GL_SetAttribute (SDL_GL_ALPHA_SIZE, rgba[i][3]);
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for (j = 0; j < 5; j++) {
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for (k = 32; k >= 16; k -= 8) {
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SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, k);
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if ((sdl_screen = SDL_SetVideoMode (viddef.width, viddef.height,
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color[j], sdl_flags)))
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goto success;
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}
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}
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}
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Sys_Error ("Couldn't set video mode: %s", SDL_GetError ());
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SDL_Quit ();
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success:
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viddef.numpages = 2;
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ctx->init_gl ();
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}
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static void
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sdlgl_end_rendering (void)
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{
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qfglFinish ();
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SDL_GL_SwapBuffers ();
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}
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static void
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sdl_load_gl (void)
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{
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if (SDL_GL_LoadLibrary (gl_driver->string) != 0)
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Sys_Error ("Couldn't load OpenGL library %s!", gl_driver->string);
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use_gl_procaddress = 1;
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qfglFinish = QFGL_ProcAddress ("glFinish", true);
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}
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gl_ctx_t *
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SDL_GL_Context (void)
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{
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gl_ctx_t *ctx = calloc (1, sizeof (gl_ctx_t));
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ctx->load_gl = sdl_load_gl;
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ctx->create_context = sdlgl_set_vid_mode;
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ctx->get_proc_address = QFGL_ProcAddress;
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ctx->end_rendering = sdlgl_end_rendering;
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return ctx;
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}
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void
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SDL_GL_Init_Cvars ()
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{
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gl_driver = Cvar_Get ("gl_driver", GL_DRIVER, CVAR_ROM, NULL,
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"The OpenGL library to use. (path optional)");
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}
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