tdfx_context.c

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

   tdfxDDInitStateFuncs( ctx );
   tdfxDDInitTriFuncs( ctx );
   tdfxInitVB( ctx );
   tdfxInitState( fxMesa );

#if DO_DEBUG
   TDFX_DEBUG = driParseDebugString( getenv( "TDFX_DEBUG" ), debug_control );
#endif

   if (driQueryOptionb(&fxMesa->optionCache, "no_rast")) {
      fprintf(stderr, "disabling 3D acceleration\n");
      FALLBACK(fxMesa, TDFX_FALLBACK_DISABLE, 1);
   }

   return GL_TRUE;
}


static GLboolean tdfxInitVertexFormats( tdfxContextPtr fxMesa )
{
   FxI32 result;
   int i;

   LOCK_HARDWARE( fxMesa );

   fxMesa->Glide.grGet( GR_GLIDE_VERTEXLAYOUT_SIZE, sizeof(FxI32), &result );
   for ( i = 0 ; i < TDFX_NUM_LAYOUTS ; i++ ) {
      fxMesa->layout[i] = MALLOC( result );
      if ( !fxMesa->layout[i] ) {
	 UNLOCK_HARDWARE( fxMesa );
	 return GL_FALSE;
      }
   }

   /* Tiny vertex format - 16 bytes.
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY,	TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_TINY] );

   /* Non textured vertex format - 24 bytes (Need w for table fog)
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY,	TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_NOTEX] );

   /* Single textured vertex format - 32 bytes.
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY,	TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_SINGLE] );

   /* Multitextured vertex format - 40 bytes.
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_MULTI] );

   /* Projected texture vertex format - 36 bytes.
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ1] );

   /* Projected multitexture vertex format - 48 bytes.
    */
   fxMesa->Glide.grReset( GR_VERTEX_PARAMETER );
   fxMesa->Glide.grCoordinateSpace( GR_WINDOW_COORDS );
   fxMesa->Glide.grVertexLayout( GR_PARAM_XY, TDFX_XY_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Z, TDFX_Z_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q, TDFX_Q_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_PARGB, TDFX_ARGB_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST0, TDFX_ST0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q0, TDFX_Q0_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_ST1, TDFX_ST1_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grVertexLayout( GR_PARAM_Q1, TDFX_Q1_OFFSET, GR_PARAM_ENABLE );
   fxMesa->Glide.grGlideGetVertexLayout( fxMesa->layout[TDFX_LAYOUT_PROJ2] );

   UNLOCK_HARDWARE( fxMesa );

   return GL_TRUE;
}


/*
 * Initialize the state in an tdfxContextPtr struct.
 */
static GLboolean
tdfxInitContext( __DRIdrawablePrivate *driDrawPriv, tdfxContextPtr fxMesa )
{
   /* KW: Would be nice to make one of these a member of the other.
    */
   FxI32 result[2];
   const char *gext;

   if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
      fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
   }

#if DEBUG_LOCKING
   fprintf(stderr, "Debug locking enabled\n");
#endif

   if ( fxMesa->Glide.Initialized )
      return GL_TRUE;

   fxMesa->width = driDrawPriv->w;
   fxMesa->height = driDrawPriv->h;

   /* We have to use a light lock here, because we can't do any glide
    * operations yet. No use of FX_* functions in this function.
    */
   DRM_LIGHT_LOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );

   fxMesa->Glide.grGlideInit();
   fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );

   fxMesa->Glide.Context = fxMesa->Glide.grSstWinOpen( (FxU32) -1,
					 GR_RESOLUTION_NONE,
					 GR_REFRESH_NONE,
					 fxMesa->Glide.ColorFormat,
					 fxMesa->Glide.Origin,
					 2, 1 );

   fxMesa->Glide.grDRIResetSAREA();

   DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );

   if ( !fxMesa->Glide.Context )
      return GL_FALSE;


   /* Perform the Glide-dependant part of the context initialization.
    */
   FX_grColorMaskv( fxMesa->glCtx, true4 );

   tdfxTMInit( fxMesa );

   LOCK_HARDWARE( fxMesa );

   /* JJJ - COMMAND_TRANSPORT, PALETTE6666 */
   gext = fxMesa->Glide.grGetString( GR_EXTENSION );
   fxMesa->Glide.HaveCombineExt = strstr(gext, "COMBINE") && !getenv("MESA_FX_IGNORE_CMBEXT");
   fxMesa->Glide.HaveCommandTransportExt = GL_FALSE;
   fxMesa->Glide.HaveFogCoordExt = GL_TRUE;
   fxMesa->Glide.HavePixelExt = strstr(gext, "PIXEXT") && !getenv("MESA_FX_IGNORE_PIXEXT");
   fxMesa->Glide.HaveTextureBufferExt = GL_TRUE;
   fxMesa->Glide.HaveTexFmtExt = strstr(gext, "TEXFMT") && !getenv("MESA_FX_IGNORE_TEXFMT");
   fxMesa->Glide.HaveTexUMAExt = strstr(gext, "TEXUMA") && !getenv("MESA_FX_IGNORE_TEXUMA");
   fxMesa->Glide.HaveMirrorExt = strstr(gext, "TEXMIRROR") && !getenv("MESA_FX_IGNORE_MIREXT");
   fxMesa->Glide.HaveTexus2 = GL_FALSE;

   if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
      fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
   } else {
      fxMesa->Glide.grDepthBufferMode(GR_DEPTHBUFFER_DISABLE);
   }

   fxMesa->Glide.grLfbWriteColorFormat( GR_COLORFORMAT_ABGR );

   fxMesa->Glide.grGet( GR_TEXTURE_ALIGN, sizeof(FxI32), result );
   fxMesa->Glide.TextureAlign = result[0];

   fxMesa->Glide.State = NULL;
   fxMesa->Glide.grGet( GR_GLIDE_STATE_SIZE, sizeof(FxI32), result );
   fxMesa->Glide.State = MALLOC( result[0] );

   fxMesa->Fog.Table = NULL;
   fxMesa->Glide.grGet( GR_FOG_TABLE_ENTRIES, sizeof(FxI32), result );
   fxMesa->Fog.Table = MALLOC( result[0] * sizeof(GrFog_t) );

   UNLOCK_HARDWARE( fxMesa );

   if ( !fxMesa->Glide.State || !fxMesa->Fog.Table ) {
      if ( fxMesa->Glide.State )
	 FREE( fxMesa->Glide.State );
      if ( fxMesa->Fog.Table )
	 FREE( fxMesa->Fog.Table );
      return GL_FALSE;
   }

   if ( !tdfxInitVertexFormats( fxMesa ) ) {
      return GL_FALSE;
   }

   LOCK_HARDWARE( fxMesa );

   fxMesa->Glide.grGlideGetState( fxMesa->Glide.State );

   if ( getenv( "FX_GLIDE_INFO" ) ) {
      printf( "GR_RENDERER  = %s\n", (char *) fxMesa->Glide.grGetString( GR_RENDERER ) );
      printf( "GR_VERSION   = %s\n", (char *) fxMesa->Glide.grGetString( GR_VERSION ) );
      printf( "GR_VENDOR    = %s\n", (char *) fxMesa->Glide.grGetString( GR_VENDOR ) );
      printf( "GR_HARDWARE  = %s\n", (char *) fxMesa->Glide.grGetString( GR_HARDWARE ) );
      printf( "GR_EXTENSION = %s\n", (char *) gext );
   }

   UNLOCK_HARDWARE( fxMesa );

   fxMesa->numClipRects = 0;
   fxMesa->pClipRects = NULL;
   fxMesa->scissoredClipRects = GL_FALSE;

   fxMesa->Glide.Initialized = GL_TRUE;

   return GL_TRUE;
}


void
tdfxDestroyContext( __DRIcontextPrivate *driContextPriv )
{
   tdfxContextPtr fxMesa = (tdfxContextPtr) driContextPriv->driverPrivate;

   if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
      fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)fxMesa );
   }

   if ( fxMesa ) {
      if (fxMesa->glCtx->Shared->RefCount == 1 && fxMesa->driDrawable) {
         /* This share group is about to go away, free our private
          * texture object data.
          */
         struct _mesa_HashTable *textures = fxMesa->glCtx->Shared->TexObjects;
         GLuint id;
         for (id = _mesa_HashFirstEntry(textures);
              id;
              id = _mesa_HashNextEntry(textures, id)) {
            struct gl_texture_object *tObj
               = _mesa_lookup_texture(fxMesa->glCtx, id);
            tdfxTMFreeTexture(fxMesa, tObj);
         }
      }

      tdfxTMClose(fxMesa);  /* free texture memory */

      _swsetup_DestroyContext( fxMesa->glCtx );
      _tnl_DestroyContext( fxMesa->glCtx );
      _vbo_DestroyContext( fxMesa->glCtx );
      _swrast_DestroyContext( fxMesa->glCtx );

      tdfxFreeVB( fxMesa->glCtx );

      /* Free Mesa context */
      fxMesa->glCtx->DriverCtx = NULL;
      _mesa_destroy_context(fxMesa->glCtx);

      /* free the tdfx context */
      FREE( fxMesa );
   }
}


GLboolean
tdfxUnbindContext( __DRIcontextPrivate *driContextPriv )
{
   GET_CURRENT_CONTEXT(ctx);
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);

   if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
      fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
   }

   if ( driContextPriv && (tdfxContextPtr) driContextPriv == fxMesa ) {
      LOCK_HARDWARE(fxMesa);
      fxMesa->Glide.grGlideGetState(fxMesa->Glide.State);
      UNLOCK_HARDWARE(fxMesa);
   }
   return GL_TRUE;
}


GLboolean
tdfxMakeCurrent( __DRIcontextPrivate *driContextPriv,
                 __DRIdrawablePrivate *driDrawPriv,
                 __DRIdrawablePrivate *driReadPriv )
{
   if ( TDFX_DEBUG & DEBUG_VERBOSE_DRI ) {
      fprintf( stderr, "%s( %p )\n", __FUNCTION__, (void *)driContextPriv );
   }

   if ( driContextPriv ) {
      tdfxContextPtr newFx = (tdfxContextPtr) driContextPriv->driverPrivate;
      GLcontext *newCtx = newFx->glCtx;
      GET_CURRENT_CONTEXT(curCtx);

      if ((newFx->driDrawable != driDrawPriv)
	  || (newFx->driReadable != driReadPriv)) {
	 newFx->driDrawable = driDrawPriv;
	 newFx->driReadable = driReadPriv;
	 newFx->dirty = ~0;
      }
      else {
         if (curCtx == newCtx) {
            /* same drawable, same context -> no-op */
            /* Need to call _mesa_make_current2() in order to make sure API
             * dispatch is set correctly.
             */
            _mesa_make_current( newCtx,
                                (GLframebuffer *) driDrawPriv->driverPrivate,
                                (GLframebuffer *) driReadPriv->driverPrivate );
            return GL_TRUE;
	 }
	 /* [dBorca] tunnel2 requires this */
	 newFx->dirty = ~0;
      }

      driUpdateFramebufferSize(newCtx, driDrawPriv);
      if (driDrawPriv != driReadPriv) {
	 driUpdateFramebufferSize(newCtx, driReadPriv);
      }

      if ( !newFx->Glide.Initialized ) {
	 if ( !tdfxInitContext( driDrawPriv, newFx ) )
	    return GL_FALSE;

	 LOCK_HARDWARE( newFx );

	 /* FIXME: Force loading of window information */