mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 08:50:58 +00:00
8ee06d75a9
This paves the way for clean initialization of the Vulkan renderer, and very much cleans up the older renderer initialization code as gl and sw are no longer intertwined.
178 lines
3.9 KiB
C
178 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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