mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-12-02 09:02:32 +00:00
dbd3d6502a
I never liked it, but with C2x coming out, it's best to handle bools properly. I haven't gone through all the uses of int as bool (I'll leave that for fixing when I encounter them), but this gets QF working with both c2x (really, gnu2x because of raw strings).
283 lines
8 KiB
C
283 lines
8 KiB
C
/*
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vid_x11_gl.c
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GLX X11 video driver
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999-2000 contributors of the QuakeForge project
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Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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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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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "QF/cvar.h"
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#include "QF/sys.h"
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#include "QF/vid.h"
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#include "context_x11.h"
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#include "r_internal.h"
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#include "vid_internal.h"
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#include "vid_gl.h"
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#define GLX_RGBA 4 // true if RGBA mode
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#define GLX_DOUBLEBUFFER 5 // double buffering supported
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#define GLX_RED_SIZE 8 // number of red component bits
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#define GLX_GREEN_SIZE 9 // number of green component bits
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#define GLX_BLUE_SIZE 10 // number of blue component bits
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#define GLX_ALPHA_SIZE 11 // number of alpha component bits
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#define GLX_DEPTH_SIZE 12 // number of depth bits
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#define GLX_STENCIL_SIZE 13 // number of stencil bits
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#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
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#define GLX_CONTEXT_FLAGS_ARB 0x2094
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#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
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#define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
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#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
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#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
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#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
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#define GLX_X_RENDERABLE 0x8012
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#define GLX_DRAWABLE_TYPE 0x8010
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#define GLX_WINDOW_BIT 0x00000001
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#define GLX_RENDER_TYPE 0x8011
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#define GLX_RGBA_BIT 0x00000001
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#define GLX_X_VISUAL_TYPE 0x22
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#define GLX_TRUE_COLOR 0x8002
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typedef XID GLXDrawable;
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// GLXContext is a pointer to opaque data
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typedef struct __GLXcontextRec *GLXContext;
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typedef struct __GLXFBConfigRec *GLXFBConfig;
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// Define GLAPIENTRY to a useful value
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#ifndef GLAPIENTRY
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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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static void *libgl_handle;
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static void (*qfglXSwapBuffers) (Display *dpy, GLXDrawable drawable);
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static GLXContext (*qfglXCreateContextAttribsARB) (Display *dpy,
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GLXFBConfig cfg,
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GLXContext ctx,
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Bool direct,
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const int *attribs);
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static void (*qfglXDestroyContext) ( Display *dpy, GLXContext ctx );
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static GLXFBConfig *(*qfglXChooseFBConfig) (Display *dpy, int screen,
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const int *attribs, int *nitems);
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static XVisualInfo *(*qfglXGetVisualFromFBConfig) (Display *dpy,
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GLXFBConfig config);
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static int (*qfglXGetFBConfigAttrib) (Display *dpy, GLXFBConfig config,
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int attribute, int *value);
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static Bool (*qfglXMakeCurrent) (Display *dpy, GLXDrawable drawable,
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GLXContext ctx);
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static void (GLAPIENTRY *qfglFinish) (void);
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static void *(*glGetProcAddress) (const char *symbol) = NULL;
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static int use_gl_procaddress = 0;
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static GLXFBConfig glx_cfg;
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static char *gl_driver;
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static cvar_t gl_driver_cvar = {
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.name = "gl_driver",
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.description =
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"The OpenGL library to use. (path optional)",
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.default_value = GL_DRIVER,
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.flags = CVAR_ROM,
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.value = { .type = 0, .value = &gl_driver },
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};
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static void *
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QFGL_GetProcAddress (void *handle, const char *name)
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{
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void *glfunc = NULL;
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if (use_gl_procaddress && glGetProcAddress)
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glfunc = glGetProcAddress (name);
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if (!glfunc)
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glfunc = dlsym (handle, name);
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return glfunc;
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}
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static void *
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QFGL_ProcAddress (const char *name, bool 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 = QFGL_GetProcAddress (libgl_handle, 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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glx_choose_visual (gl_ctx_t *ctx)
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{
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int attrib[] = {
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GLX_X_RENDERABLE, True,
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
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GLX_RED_SIZE, 8,
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GLX_GREEN_SIZE, 8,
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GLX_BLUE_SIZE, 8,
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GLX_ALPHA_SIZE, 8,
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GLX_DEPTH_SIZE, 24,
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//I can't tell if this makes any difference to performance, but it's
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//currently not needed
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//GLX_STENCIL_SIZE, 8,
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GLX_DOUBLEBUFFER, True,
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None
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};
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int fbcount;
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GLXFBConfig *fbc = qfglXChooseFBConfig (x_disp, x_screen, attrib, &fbcount);
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if (!fbc) {
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Sys_Error ("Failed to retrieve a framebuffer config");
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}
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Sys_MaskPrintf (SYS_vid, "Found %d matching FB configs.\n", fbcount);
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glx_cfg = fbc[0];
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x_visinfo = qfglXGetVisualFromFBConfig (x_disp, glx_cfg);
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XFree (fbc);
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if (!x_visinfo) {
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Sys_Error ("Error couldn't get an RGB, Double-buffered, Depth visual");
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}
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x_vis = x_visinfo->visual;
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}
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static void
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glx_create_context (gl_ctx_t *ctx, int core)
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{
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int attribs[] = {
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GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
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GLX_CONTEXT_MINOR_VERSION_ARB, 0,
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GLX_CONTEXT_PROFILE_MASK_ARB,
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core ? GLX_CONTEXT_CORE_PROFILE_BIT_ARB
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: GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
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None
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};
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XSync (x_disp, 0);
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ctx->context = (GL_context) qfglXCreateContextAttribsARB (x_disp, glx_cfg,
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0, True, attribs);
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qfglXMakeCurrent (x_disp, x_win, (GLXContext) ctx->context);
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ctx->init_gl ();
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}
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static void
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glx_end_rendering (void)
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{
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qfglFinish ();
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qfglXSwapBuffers (x_disp, x_win);
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}
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static void
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glx_load_gl (gl_ctx_t *ctx)
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{
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libgl_handle = dlopen (gl_driver, RTLD_NOW);
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if (!libgl_handle) {
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Sys_Error ("Couldn't load OpenGL library %s: %s", gl_driver,
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dlerror ());
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}
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glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddress");
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if (!glGetProcAddress)
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glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddressARB");
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qfglXSwapBuffers = QFGL_ProcAddress ("glXSwapBuffers", true);
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qfglXChooseFBConfig = QFGL_ProcAddress ("glXChooseFBConfig", true);
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qfglXGetVisualFromFBConfig = QFGL_ProcAddress ("glXGetVisualFromFBConfig", true);
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qfglXGetFBConfigAttrib = QFGL_ProcAddress ("glXGetFBConfigAttrib", true);
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qfglXCreateContextAttribsARB = QFGL_ProcAddress ("glXCreateContextAttribsARB", true);
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qfglXDestroyContext = QFGL_ProcAddress ("glXDestroyContext", true);
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qfglXMakeCurrent = QFGL_ProcAddress ("glXMakeCurrent", true);
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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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static void
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glx_unload_gl (void *_ctx)
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{
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gl_ctx_t *ctx = _ctx;
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if (libgl_handle) {
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dlclose (libgl_handle);
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libgl_handle = 0;
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}
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free (ctx);
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}
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gl_ctx_t *
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X11_GL_Context (vid_internal_t *vi)
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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 = glx_load_gl;
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ctx->choose_visual = glx_choose_visual;
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ctx->create_context = glx_create_context;
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ctx->get_proc_address = QFGL_ProcAddress;
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ctx->end_rendering = glx_end_rendering;
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vi->unload = glx_unload_gl;
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vi->ctx = ctx;
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return ctx;
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}
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void
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X11_GL_Init_Cvars (void)
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{
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Cvar_Register (&gl_driver_cvar, 0, 0);
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}
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