/* vid_x11_gl.c GLX X11 video driver Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 1999-2000 contributors of the QuakeForge project Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se] Copyright (C) 1999,2000 contributors of the QuakeForge project Please see the file "AUTHORS" for a list of contributors 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #ifdef HAVE_UNISTD_H # include #endif #include #include #include #include #include "QF/cvar.h" #include "QF/sys.h" #include "QF/vid.h" #include "context_x11.h" #include "r_internal.h" #include "vid_internal.h" #include "vid_gl.h" #define GLX_RGBA 4 // true if RGBA mode #define GLX_DOUBLEBUFFER 5 // double buffering supported #define GLX_RED_SIZE 8 // number of red component bits #define GLX_GREEN_SIZE 9 // number of green component bits #define GLX_BLUE_SIZE 10 // number of blue component bits #define GLX_ALPHA_SIZE 11 // number of alpha component bits #define GLX_DEPTH_SIZE 12 // number of depth bits #define GLX_STENCIL_SIZE 13 // number of stencil bits #define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091 #define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092 #define GLX_CONTEXT_FLAGS_ARB 0x2094 #define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126 #define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001 #define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002 #define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001 #define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002 #define GLX_X_RENDERABLE 0x8012 #define GLX_DRAWABLE_TYPE 0x8010 #define GLX_WINDOW_BIT 0x00000001 #define GLX_RENDER_TYPE 0x8011 #define GLX_RGBA_BIT 0x00000001 #define GLX_X_VISUAL_TYPE 0x22 #define GLX_TRUE_COLOR 0x8002 typedef XID GLXDrawable; // GLXContext is a pointer to opaque data typedef struct __GLXcontextRec *GLXContext; typedef struct __GLXFBConfigRec *GLXFBConfig; // Define GLAPIENTRY to a useful value #ifndef GLAPIENTRY # ifdef APIENTRY # define GLAPIENTRY APIENTRY # else # define GLAPIENTRY # endif #endif static void *libgl_handle; static void (*qfglXSwapBuffers) (Display *dpy, GLXDrawable drawable); static GLXContext (*qfglXCreateContextAttribsARB) (Display *dpy, GLXFBConfig cfg, GLXContext ctx, Bool direct, const int *attribs); static GLXFBConfig *(*qfglXChooseFBConfig) (Display *dpy, int screen, const int *attribs, int *nitems); static XVisualInfo *(*qfglXGetVisualFromFBConfig) (Display *dpy, GLXFBConfig config); static int (*qfglXGetFBConfigAttrib) (Display *dpy, GLXFBConfig config, int attribute, int *value); static Bool (*qfglXMakeCurrent) (Display *dpy, GLXDrawable drawable, GLXContext ctx); static void (GLAPIENTRY *qfglFinish) (void); static void *(*glGetProcAddress) (const char *symbol) = NULL; static int use_gl_procaddress = 0; static GLXFBConfig glx_cfg; static cvar_t *gl_driver; static void * QFGL_GetProcAddress (void *handle, const char *name) { void *glfunc = NULL; if (use_gl_procaddress && glGetProcAddress) glfunc = glGetProcAddress (name); if (!glfunc) glfunc = dlsym (handle, name); return glfunc; } static void * QFGL_ProcAddress (const char *name, qboolean crit) { void *glfunc = NULL; Sys_MaskPrintf (SYS_vid, "DEBUG: Finding symbol %s ... ", name); glfunc = QFGL_GetProcAddress (libgl_handle, name); if (glfunc) { Sys_MaskPrintf (SYS_vid, "found [%p]\n", glfunc); return glfunc; } Sys_MaskPrintf (SYS_vid, "not found\n"); if (crit) { if (strncmp ("fxMesa", name, 6) == 0) { Sys_Printf ("This target requires a special version of Mesa with " "support for Glide and SVGAlib.\n"); Sys_Printf ("If you are in X, try using a GLX or SGL target.\n"); } Sys_Error ("Couldn't load critical OpenGL function %s, exiting...", name); } return NULL; } static void glx_choose_visual (gl_ctx_t *ctx) { int attrib[] = { GLX_X_RENDERABLE, True, GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, GLX_RENDER_TYPE, GLX_RGBA_BIT, GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR, GLX_RED_SIZE, 8, GLX_GREEN_SIZE, 8, GLX_BLUE_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_DEPTH_SIZE, 24, //I can't tell if this makes any difference to performance, but it's //currently not needed //GLX_STENCIL_SIZE, 8, GLX_DOUBLEBUFFER, True, None }; int fbcount; GLXFBConfig *fbc = qfglXChooseFBConfig (x_disp, x_screen, attrib, &fbcount); if (!fbc) { Sys_Error ("Failed to retrieve a framebuffer config"); } Sys_MaskPrintf (SYS_vid, "Found %d matching FB configs.\n", fbcount); glx_cfg = fbc[0]; XFree (fbc); x_visinfo = qfglXGetVisualFromFBConfig (x_disp, glx_cfg); if (!x_visinfo) { Sys_Error ("Error couldn't get an RGB, Double-buffered, Depth visual"); } x_vis = x_visinfo->visual; } static void glx_create_context (gl_ctx_t *ctx, int core) { int attribs[] = { GLX_CONTEXT_MAJOR_VERSION_ARB, 3, GLX_CONTEXT_MINOR_VERSION_ARB, 0, GLX_CONTEXT_PROFILE_MASK_ARB, core ? GLX_CONTEXT_CORE_PROFILE_BIT_ARB : GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, None }; XSync (x_disp, 0); ctx->context = (GL_context) qfglXCreateContextAttribsARB (x_disp, glx_cfg, 0, True, attribs); qfglXMakeCurrent (x_disp, x_win, (GLXContext) ctx->context); ctx->init_gl (); } static void glx_end_rendering (void) { qfglFinish (); qfglXSwapBuffers (x_disp, x_win); } static void glx_load_gl (void) { libgl_handle = dlopen (gl_driver->string, RTLD_NOW); if (!libgl_handle) { Sys_Error ("Couldn't load OpenGL library %s: %s", gl_driver->string, dlerror ()); } glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddress"); if (!glGetProcAddress) glGetProcAddress = dlsym (libgl_handle, "glXGetProcAddressARB"); qfglXSwapBuffers = QFGL_ProcAddress ("glXSwapBuffers", true); qfglXChooseFBConfig = QFGL_ProcAddress ("glXChooseFBConfig", true); qfglXGetVisualFromFBConfig = QFGL_ProcAddress ("glXGetVisualFromFBConfig", true); qfglXGetFBConfigAttrib = QFGL_ProcAddress ("glXGetFBConfigAttrib", true); qfglXCreateContextAttribsARB = QFGL_ProcAddress ("glXCreateContextAttribsARB", true); qfglXMakeCurrent = QFGL_ProcAddress ("glXMakeCurrent", true); use_gl_procaddress = 1; qfglFinish = QFGL_ProcAddress ("glFinish", true); } gl_ctx_t * X11_GL_Context (void) { gl_ctx_t *ctx = calloc (1, sizeof (gl_ctx_t)); ctx->load_gl = glx_load_gl; ctx->choose_visual = glx_choose_visual; ctx->create_context = glx_create_context; ctx->get_proc_address = QFGL_ProcAddress; ctx->end_rendering = glx_end_rendering; return ctx; } void X11_GL_Init_Cvars (void) { gl_driver = Cvar_Get ("gl_driver", GL_DRIVER, CVAR_ROM, NULL, "The OpenGL library to use. (path optional)"); }