xm_api.c

mesa-6.5-minigui源码

         red_bits = depth / 3;
         depth -= red_bits;
         green_bits = depth / 2;
         depth -= green_bits;
         blue_bits = depth;
         alpha_bits = 0;
         assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
      }
   }

   if (alpha_flag && alpha_bits == 0)
      alpha_bits = 8;

   _mesa_initialize_visual( &v->mesa_visual,
                            rgb_flag, db_flag, stereo_flag,
                            red_bits, green_bits,
                            blue_bits, alpha_bits,
                            v->mesa_visual.indexBits,
                            depth_size,
                            stencil_size,
                            accum_red_size, accum_green_size,
                            accum_blue_size, accum_alpha_size,
                            0 );

   /* XXX minor hack */
   v->mesa_visual.level = level;
   return v;
}


void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v )
{
    v->display = dpy;
}


void XMesaDestroyVisual( XMesaVisual v )
{
#ifndef XFree86Server
   _mesa_free(v->visinfo);
#endif
   _mesa_free(v);
}



/**
 * Create a new XMesaContext.
 * \param v  the XMesaVisual
 * \param share_list  another XMesaContext with which to share display
 *                    lists or NULL if no sharing is wanted.
 * \return an XMesaContext or NULL if error.
 */
XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
{
   static GLboolean firstTime = GL_TRUE;
   XMesaContext c;
   GLcontext *mesaCtx;
   struct dd_function_table functions;
   TNLcontext *tnl;

   if (firstTime) {
      _glthread_INIT_MUTEX(_xmesa_lock);
      firstTime = GL_FALSE;
   }

   /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
   c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
   if (!c)
      return NULL;

   mesaCtx = &(c->mesa);

   /* initialize with default driver functions, then plug in XMesa funcs */
   _mesa_init_driver_functions(&functions);
   xmesa_init_driver_functions(v, &functions);
   if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
                      share_list ? &(share_list->mesa) : (GLcontext *) NULL,
                      &functions, (void *) c)) {
      _mesa_free(c);
      return NULL;
   }

   _mesa_enable_sw_extensions(mesaCtx);
   _mesa_enable_1_3_extensions(mesaCtx);
   _mesa_enable_1_4_extensions(mesaCtx);
   _mesa_enable_1_5_extensions(mesaCtx);
   _mesa_enable_2_0_extensions(mesaCtx);
#if ENABLE_EXT_texure_compression_s3tc
    if (c->Mesa_DXTn) {
       _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
       _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
    }
    _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
#endif
#if ENABLE_EXT_timer_query
    _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
#endif

   /* finish up xmesa context initializations */
   c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
   c->xm_visual = v;
   c->xm_buffer = NULL;   /* set later by XMesaMakeCurrent */
   c->display = v->display;
   c->pixelformat = v->dithered_pf;      /* Dithering is enabled by default */

   /* Initialize the software rasterizer and helper modules.
    */
   if (!_swrast_CreateContext( mesaCtx ) ||
       !_ac_CreateContext( mesaCtx ) ||
       !_tnl_CreateContext( mesaCtx ) ||
       !_swsetup_CreateContext( mesaCtx )) {
      _mesa_free_context_data(&c->mesa);
      _mesa_free(c);
      return NULL;
   }

   /* tnl setup */
   tnl = TNL_CONTEXT(mesaCtx);
   tnl->Driver.RunPipeline = _tnl_run_pipeline;
   /* swrast setup */
   xmesa_register_swrast_functions( mesaCtx );
   _swsetup_Wakeup(mesaCtx);

   return c;
}



void XMesaDestroyContext( XMesaContext c )
{
   GLcontext *mesaCtx = &c->mesa;
#ifdef FX
   XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer);

   if (xmbuf && xmbuf->FXctx)
      fxMesaDestroyContext(xmbuf->FXctx);
#endif
   _swsetup_DestroyContext( mesaCtx );
   _swrast_DestroyContext( mesaCtx );
   _tnl_DestroyContext( mesaCtx );
   _ac_DestroyContext( mesaCtx );
   _mesa_free_context_data( mesaCtx );
   _mesa_free( c );
}



/*
 * XXX this isn't a public function!  It's a hack for the 3Dfx driver.
 * Create a new XMesaBuffer from an X window.
 * Input:  v - the XMesaVisual
 *         w - the window
 *         c - the context
 * Return:  new XMesaBuffer or NULL if error
 */
XMesaBuffer
XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c)
{
#ifndef XFree86Server
   XWindowAttributes attr;
#endif
#ifdef FX
   char *fxEnvVar;
#endif
   int client = 0;
   XMesaBuffer b;
   XMesaColormap cmap;

   assert(v);
   (void) c;

   /* Check that window depth matches visual depth */
#ifdef XFree86Server
   client = CLIENT_ID(((XMesaDrawable)w)->id);

   if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) {
      _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
                    GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth);
      return NULL;
   }
#else
   XGetWindowAttributes( v->display, w, &attr );

   if (GET_VISUAL_DEPTH(v) != attr.depth) {
      _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
                    GET_VISUAL_DEPTH(v), attr.depth);
      return NULL;
   }
#endif

   /* Find colormap */
#ifdef XFree86Server
   cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
#else
   if (attr.colormap) {
      cmap = attr.colormap;
   }
   else {
      _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
      /* this is weird, a window w/out a colormap!? */
      /* OK, let's just allocate a new one and hope for the best */
      cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
   }
#endif

   b = alloc_xmesa_buffer(v, WINDOW, cmap);
   if (!b) {
      return NULL;
   }

   if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode,
                                      (XMesaDrawable) w, cmap )) {
      free_xmesa_buffer(client, b);
      return NULL;
   }

#ifdef FX
   fxEnvVar = _mesa_getenv("MESA_GLX_FX");
   if (fxEnvVar) {
     if (fxEnvVar[0]!='d') {
       int attribs[100];
       int numAttribs = 0;
       int hw;
       if (v->mesa_visual.depthBits > 0) {
	 attribs[numAttribs++] = FXMESA_DEPTH_SIZE;
	 attribs[numAttribs++] = v->mesa_visual.depthBits;
       }
       if (v->mesa_visual.doubleBufferMode) {
	 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER;
       }
       if (v->mesa_visual.accumRedBits > 0) {
	 attribs[numAttribs++] = FXMESA_ACCUM_SIZE;
	 attribs[numAttribs++] = v->mesa_visual.accumRedBits;
       }
       if (v->mesa_visual.stencilBits > 0) {
         attribs[numAttribs++] = FXMESA_STENCIL_SIZE;
         attribs[numAttribs++] = v->mesa_visual.stencilBits;
       }
       if (v->mesa_visual.alphaBits > 0) {
         attribs[numAttribs++] = FXMESA_ALPHA_SIZE;
         attribs[numAttribs++] = v->mesa_visual.alphaBits;
       }
       if (1) {
         attribs[numAttribs++] = FXMESA_SHARE_CONTEXT;
         attribs[numAttribs++] = (int) &(c->mesa);
       }
       attribs[numAttribs++] = FXMESA_NONE;

       /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */
       hw = fxMesaSelectCurrentBoard(0);

       /* if these fail, there's a new bug somewhere */
       ASSERT(b->mesa_buffer.Width > 0);
       ASSERT(b->mesa_buffer.Height > 0);

       if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) {
         b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
                                            b->mesa_buffer.Height, attribs);
         if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) {
	   b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE;
	   if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) {
	     b->FXwindowHack = GL_TRUE;
	     FX_grSstControl(GR_CONTROL_DEACTIVATE);
	   }
           else {
	     b->FXwindowHack = GL_FALSE;
	   }
         }
       }
       else {
         if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
	   b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE,
					  GR_REFRESH_75Hz, attribs);
         else
	   b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
                                              b->mesa_buffer.Height, attribs);
         b->FXisHackUsable = GL_FALSE;
         b->FXwindowHack = GL_FALSE;
       }
       /*
       fprintf(stderr,
               "voodoo %d, wid %d height %d hack: usable %d active %d\n",
               hw, b->mesa_buffer.Width, b->mesa_buffer.Height,
	       b->FXisHackUsable, b->FXwindowHack);
       */
     }
   }
   else {
      _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n");
      _mesa_warning(NULL, "         you have not defined the MESA_GLX_FX env. var.\n");
      _mesa_warning(NULL, "         (check the README.3DFX file for more information).\n\n");
      _mesa_warning(NULL, "         you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
   }
#endif

   return b;
}


XMesaBuffer
XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
{
   return XMesaCreateWindowBuffer2( v, w, NULL );
}


/**
 * Create a new XMesaBuffer from an X pixmap.
 *
 * \param v    the XMesaVisual
 * \param p    the pixmap
 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
 *             \c GLX_DIRECT_COLOR visual for the pixmap
 * \returns new XMesaBuffer or NULL if error
 */
XMesaBuffer
XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
{
   int client = 0;
   XMesaBuffer b;

   assert(v);

   b = alloc_xmesa_buffer(v, PIXMAP, cmap);
   if (!b) {
      return NULL;
   }

#ifdef XFree86Server
   client = CLIENT_ID(((XMesaDrawable)p)->id);
#endif

   if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode,
				     (XMesaDrawable) p, cmap)) {
      free_xmesa_buffer(client, b);
      return NULL;
   }

   return b;
}



XMesaBuffer
XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
                   unsigned int width, unsigned int height)
{
#ifdef XFree86Server
   return 0;
#else
   int client = 0;
   XMesaWindow root;
   XMesaDrawable drawable;  /* X Pixmap Drawable */
   XMesaBuffer b;

   b = alloc_xmesa_buffer(v, PBUFFER, cmap);
   if (!b) {
      return NULL;
   }

   /* allocate pixmap for front buffer */
   root = RootWindow( v->display, v->visinfo->screen );
   drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth );

   if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode,
				     drawable, cmap)) {
      free_xmesa_buffer(client, b);
      return NULL;
   }

   return b;
#endif
}



/*
 * Deallocate an XMesaBuffer structure and all related info.
 */
void XMesaDestroyBuffer( XMesaBuffer b )
{
   int client = 0;

#ifdef XFree86Server
   if (b->frontxrb->drawable)
       client = CLIENT_ID(b->frontxrb->drawable->id);
#endif

   if (b->gc)  XMesaFreeGC( b->xm_visual->display, b->gc );
   if (b->cleargc)  XMesaFreeGC( b->xm_visual->display, b->cleargc );
   if (b->swapgc)  XMesaFreeGC( b->xm_visual->display, b->swapgc );

   if (b->xm_visual->mesa_visual.doubleBufferMode)
   {
      if (b->backxrb->ximage) {
#if defined(USE_XSHM) && !defined(XFree86Server)
         if (b->shm) {
            XShmDetach( b->xm_visual->display, &b->shminfo );
            XDestroyImage( b->backxrb->ximage );