fakeglx.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

      /*
       * GLX_EXT_visual_info extension
       */
      case GLX_VISUAL_CAVEAT_EXT:
         /* test for zero, just in case */
         if (xmvis->mesa_visual.visualRating > 0)
            *value = xmvis->mesa_visual.visualRating;
         else
            *value = GLX_NONE_EXT;
         return 0;

      /*
       * GLX_ARB_multisample
       */
      case GLX_SAMPLE_BUFFERS_ARB:
         *value = 0;
         return 0;
      case GLX_SAMPLES_ARB:
         *value = 0;
         return 0;

      /*
       * For FBConfigs:
       */
      case GLX_SCREEN_EXT:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = xmvis->visinfo->screen;
         break;
      case GLX_DRAWABLE_TYPE: /*SGIX too */
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
         break;
      case GLX_RENDER_TYPE_SGIX:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         if (xmvis->mesa_visual.rgbMode)
            *value = GLX_RGBA_BIT;
         else
            *value = GLX_COLOR_INDEX_BIT;
         break;
      case GLX_X_RENDERABLE_SGIX:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = True; /* XXX really? */
         break;
      case GLX_FBCONFIG_ID_SGIX:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = xmvis->visinfo->visualid;
         break;
      case GLX_MAX_PBUFFER_WIDTH:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         /* XXX or MAX_WIDTH? */
         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen);
         break;
      case GLX_MAX_PBUFFER_HEIGHT:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = DisplayHeight(xmvis->display, xmvis->visinfo->screen);
         break;
      case GLX_MAX_PBUFFER_PIXELS:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = DisplayWidth(xmvis->display, xmvis->visinfo->screen) *
                  DisplayHeight(xmvis->display, xmvis->visinfo->screen);
         break;
      case GLX_VISUAL_ID:
         if (!fbconfig)
            return GLX_BAD_ATTRIBUTE;
         *value = xmvis->visinfo->visualid;
         break;

#ifdef GLX_EXT_texture_from_pixmap
      case GLX_BIND_TO_TEXTURE_RGB_EXT:
         *value = True; /*XXX*/
         break;
      case GLX_BIND_TO_TEXTURE_RGBA_EXT:
         /* XXX review */
         *value = xmvis->mesa_visual.alphaBits > 0 ? True : False;
         break;
      case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
         *value = True; /*XXX*/
         break;
      case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
         *value = (GLX_TEXTURE_1D_BIT_EXT |
                   GLX_TEXTURE_2D_BIT_EXT |
                   GLX_TEXTURE_RECTANGLE_BIT_EXT); /*XXX*/
         break;
      case GLX_Y_INVERTED_EXT:
         *value = True; /*XXX*/
         break;
#endif

      default:
	 return GLX_BAD_ATTRIBUTE;
   }
   return Success;
}


static int
Fake_glXGetConfig( Display *dpy, XVisualInfo *visinfo,
                   int attrib, int *value )
{
   XMesaVisual xmvis;
   int k;
   if (!dpy || !visinfo)
      return GLX_BAD_ATTRIBUTE;

   xmvis = find_glx_visual( dpy, visinfo );
   if (!xmvis) {
      /* this visual wasn't obtained with glXChooseVisual */
      xmvis = create_glx_visual( dpy, visinfo );
      if (!xmvis) {
	 /* this visual can't be used for GL rendering */
	 if (attrib==GLX_USE_GL) {
	    *value = (int) False;
	    return 0;
	 }
	 else {
	    return GLX_BAD_VISUAL;
	 }
      }
   }

   k = get_config(xmvis, attrib, value, GL_FALSE);
   return k;
}


static void
Fake_glXWaitGL( void )
{
   XMesaContext xmesa = XMesaGetCurrentContext();
   XMesaFlush( xmesa );
}



static void
Fake_glXWaitX( void )
{
   XMesaContext xmesa = XMesaGetCurrentContext();
   XMesaFlush( xmesa );
}


static const char *
get_extensions( void )
{
#ifdef FX
   const char *fx = _mesa_getenv("MESA_GLX_FX");
   if (fx && fx[0] != 'd') {
      return EXTENSIONS;
   }
#endif
   return EXTENSIONS + 23; /* skip "GLX_MESA_set_3dfx_mode" */
}



/* GLX 1.1 and later */
static const char *
Fake_glXQueryExtensionsString( Display *dpy, int screen )
{
   (void) dpy;
   (void) screen;
   return get_extensions();
}



/* GLX 1.1 and later */
static const char *
Fake_glXQueryServerString( Display *dpy, int screen, int name )
{
   static char version[1000];
   _mesa_sprintf(version, "%d.%d %s",
                 SERVER_MAJOR_VERSION, SERVER_MINOR_VERSION, MESA_GLX_VERSION);

   (void) dpy;
   (void) screen;

   switch (name) {
      case GLX_EXTENSIONS:
         return get_extensions();
      case GLX_VENDOR:
	 return VENDOR;
      case GLX_VERSION:
	 return version;
      default:
         return NULL;
   }
}



/* GLX 1.1 and later */
static const char *
Fake_glXGetClientString( Display *dpy, int name )
{
   static char version[1000];
   _mesa_sprintf(version, "%d.%d %s", CLIENT_MAJOR_VERSION,
                 CLIENT_MINOR_VERSION, MESA_GLX_VERSION);

   (void) dpy;

   switch (name) {
      case GLX_EXTENSIONS:
         return get_extensions();
      case GLX_VENDOR:
	 return VENDOR;
      case GLX_VERSION:
	 return version;
      default:
         return NULL;
   }
}



/*
 * GLX 1.3 and later
 */


static int
Fake_glXGetFBConfigAttrib( Display *dpy, GLXFBConfig config,
                           int attribute, int *value )
{
   XMesaVisual v = (XMesaVisual) config;
   (void) dpy;
   (void) config;

   if (!dpy || !config || !value)
      return -1;

   return get_config(v, attribute, value, GL_TRUE);
}


static GLXFBConfig *
Fake_glXGetFBConfigs( Display *dpy, int screen, int *nelements )
{
   XVisualInfo *visuals, visTemplate;
   const long visMask = VisualScreenMask;
   int i;

   /* Get list of all X visuals */
   visTemplate.screen = screen;
   visuals = XGetVisualInfo(dpy, visMask, &visTemplate, nelements);
   if (*nelements > 0) {
      XMesaVisual *results;
      results = (XMesaVisual *) _mesa_malloc(*nelements * sizeof(XMesaVisual));
      if (!results) {
         *nelements = 0;
         return NULL;
      }
      for (i = 0; i < *nelements; i++) {
         results[i] = create_glx_visual(dpy, visuals + i);
      }
      return (GLXFBConfig *) results;
   }
   return NULL;
}


static GLXFBConfig *
Fake_glXChooseFBConfig( Display *dpy, int screen,
                        const int *attribList, int *nitems )
{
   XMesaVisual xmvis;

   if (!attribList || !attribList[0]) {
      /* return list of all configs (per GLX_SGIX_fbconfig spec) */
      return Fake_glXGetFBConfigs(dpy, screen, nitems);
   }

   xmvis = choose_visual(dpy, screen, attribList, GL_TRUE);
   if (xmvis) {
      GLXFBConfig *config = (GLXFBConfig *) _mesa_malloc(sizeof(XMesaVisual));
      if (!config) {
         *nitems = 0;
         return NULL;
      }
      *nitems = 1;
      config[0] = (GLXFBConfig) xmvis;
      return (GLXFBConfig *) config;
   }
   else {
      *nitems = 0;
      return NULL;
   }
}


static XVisualInfo *
Fake_glXGetVisualFromFBConfig( Display *dpy, GLXFBConfig config )
{
   if (dpy && config) {
      XMesaVisual xmvis = (XMesaVisual) config;
#if 0      
      return xmvis->vishandle;
#else
      /* create a new vishandle - the cached one may be stale */
      xmvis->vishandle = (XVisualInfo *) _mesa_malloc(sizeof(XVisualInfo));
      if (xmvis->vishandle) {
         _mesa_memcpy(xmvis->vishandle, xmvis->visinfo, sizeof(XVisualInfo));
      }
      return xmvis->vishandle;
#endif
   }
   else {
      return NULL;
   }
}


static GLXWindow
Fake_glXCreateWindow( Display *dpy, GLXFBConfig config, Window win,
                      const int *attribList )
{
   XMesaVisual xmvis = (XMesaVisual) config;
   XMesaBuffer xmbuf;
   if (!xmvis)
      return 0;

   xmbuf = XMesaCreateWindowBuffer(xmvis, win);
   if (!xmbuf)
      return 0;

#ifdef FX
   /* XXX this will segfault if actually called */
   FXcreateContext(xmvis, win, NULL, xmbuf);
#endif

   (void) dpy;
   (void) attribList;  /* Ignored in GLX 1.3 */

   return win;  /* A hack for now */
}


static void
Fake_glXDestroyWindow( Display *dpy, GLXWindow window )
{
   XMesaBuffer b = XMesaFindBuffer(dpy, (XMesaDrawable) window);
   if (b)
      XMesaDestroyBuffer(b);
   /* don't destroy X window */
}


/* XXX untested */
static GLXPixmap
Fake_glXCreatePixmap( Display *dpy, GLXFBConfig config, Pixmap pixmap,
                      const int *attribList )
{
   XMesaVisual v = (XMesaVisual) config;
   XMesaBuffer b;
   const int *attr;
   int target = 0, format = 0, mipmap = 0;
   int value;

   if (!dpy || !config || !pixmap)
      return 0;

   for (attr = attribList; *attr; attr++) {
      switch (*attr) {
      case GLX_TEXTURE_FORMAT_EXT:
         attr++;
         switch (*attr) {
         case GLX_TEXTURE_FORMAT_NONE_EXT:
         case GLX_TEXTURE_FORMAT_RGB_EXT:
         case GLX_TEXTURE_FORMAT_RGBA_EXT:
            format = *attr;
            break;
         default:
            /* error */
            return 0;
         }
         break;
      case GLX_TEXTURE_TARGET_EXT:
         attr++;
         switch (*attr) {
         case GLX_TEXTURE_1D_EXT:
         case GLX_TEXTURE_2D_EXT:
         case GLX_TEXTURE_RECTANGLE_EXT:
            target = *attr;
            break;
         default:
            /* error */
            return 0;
         }
         break;
      case GLX_MIPMAP_TEXTURE_EXT:
         attr++;
         if (*attr)
            mipmap = 1;
         break;
      default:
         /* error */
         return 0;
      }
   }

   if (format == GLX_TEXTURE_FORMAT_RGB_EXT) {
      if (get_config(v, GLX_BIND_TO_TEXTURE_RGB_EXT,
                     &value, GL_TRUE) != Success
          || !value) {
         return 0; /* error! */
      }
   }
   else if (format == GLX_TEXTURE_FORMAT_RGBA_EXT) {
      if (get_config(v, GLX_BIND_TO_TEXTURE_RGBA_EXT,
                     &value, GL_TRUE) != Success
          || !value) {
         return 0; /* error! */
      }
   }
   if (mipmap) {
      if (get_config(v, GLX_BIND_TO_MIPMAP_TEXTURE_EXT,
                     &value, GL_TRUE) != Success
          || !value) {
         return 0; /* error! */
      }
   }
   if (target == GLX_TEXTURE_1D_EXT) {
      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
                     &value, GL_TRUE) != Success
          || (value & GLX_TEXTURE_1D_BIT_EXT) == 0) {
         return 0; /* error! */
      }
   }
   else if (target == GLX_TEXTURE_2D_EXT) {
      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
                     &value, GL_TRUE) != Success
          || (value & GLX_TEXTURE_2D_BIT_EXT) == 0) {
         return 0; /* error! */
      }
   }
   if (target == GLX_TEXTURE_RECTANGLE_EXT) {
      if (get_config(v, GLX_BIND_TO_TEXTURE_TARGETS_EXT,
                     &value, GL_TRUE) != Success
          || (value & GLX_TEXTURE_RECTANGLE_BIT_EXT) == 0) {
         return 0; /* error! */
      }
   }

   if (format || target || mipmap) {
      /* texture from pixmap */
      b = XMesaCrea