i810context.c

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

   /* Initialize the software rasterizer and helper modules.
    */
   _swrast_CreateContext( ctx );
   _vbo_CreateContext( ctx );
   _tnl_CreateContext( ctx );
   _swsetup_CreateContext( ctx );

   /* Install the customized pipeline:
    */
   _tnl_destroy_pipeline( ctx );
   _tnl_install_pipeline( ctx, i810_pipeline );

   /* Configure swrast and T&L to match hardware characteristics:
    */
   _swrast_allow_pixel_fog( ctx, GL_FALSE );
   _swrast_allow_vertex_fog( ctx, GL_TRUE );
   _tnl_allow_pixel_fog( ctx, GL_FALSE );
   _tnl_allow_vertex_fog( ctx, GL_TRUE );

   /* Dri stuff
    */
   imesa->hHWContext = driContextPriv->hHWContext;
   imesa->driFd = sPriv->fd;
   imesa->driHwLock = &sPriv->pSAREA->lock;

   imesa->stipple_in_hw = 1;
   imesa->RenderIndex = ~0;
   imesa->dirty = I810_UPLOAD_CTX|I810_UPLOAD_BUFFERS;
   imesa->upload_cliprects = GL_TRUE;

   imesa->CurrentTexObj[0] = 0;
   imesa->CurrentTexObj[1] = 0;

   _math_matrix_ctr( &imesa->ViewportMatrix );

   driInitExtensions( ctx, card_extensions, GL_TRUE );
   /* XXX these should really go right after _mesa_init_driver_functions() */
   i810InitStateFuncs( ctx );
   i810InitTriFuncs( ctx );
   i810InitSpanFuncs( ctx );
   i810InitVB( ctx );
   i810InitState( ctx );

#if DO_DEBUG
   I810_DEBUG  = driParseDebugString( getenv( "I810_DEBUG" ),
				      debug_control );
   I810_DEBUG |= driParseDebugString( getenv( "INTEL_DEBUG" ),
				      debug_control );
#endif

   return GL_TRUE;
}

void
i810DestroyContext(__DRIcontextPrivate *driContextPriv)
{
   i810ContextPtr imesa = (i810ContextPtr) driContextPriv->driverPrivate;

   assert(imesa); /* should never be null */
   if (imesa) {
      GLboolean   release_texture_heaps;


      release_texture_heaps = (imesa->glCtx->Shared->RefCount == 1);
      _swsetup_DestroyContext( imesa->glCtx );
      _tnl_DestroyContext( imesa->glCtx );
      _vbo_DestroyContext( imesa->glCtx );
      _swrast_DestroyContext( imesa->glCtx );

      i810FreeVB( imesa->glCtx );

      /* free the Mesa context */
      imesa->glCtx->DriverCtx = NULL;
      _mesa_destroy_context(imesa->glCtx);
      if ( release_texture_heaps ) {
 	 /* This share group is about to go away, free our private
          * texture object data.
          */
	 unsigned int i;

         for ( i = 0 ; i < imesa->nr_heaps ; i++ ) {
	    driDestroyTextureHeap( imesa->texture_heaps[ i ] );
	    imesa->texture_heaps[ i ] = NULL;
         }

	 assert( is_empty_list( & imesa->swapped ) );
      }

      FREE(imesa);
   }
}


void i810XMesaSetFrontClipRects( i810ContextPtr imesa )
{
   __DRIdrawablePrivate *dPriv = imesa->driDrawable;

   imesa->numClipRects = dPriv->numClipRects;
   imesa->pClipRects = dPriv->pClipRects;
   imesa->drawX = dPriv->x;
   imesa->drawY = dPriv->y;

   i810EmitDrawingRectangle( imesa );
   imesa->upload_cliprects = GL_TRUE;
}


void i810XMesaSetBackClipRects( i810ContextPtr imesa )
{
   __DRIdrawablePrivate *dPriv = imesa->driDrawable;

   if (imesa->sarea->pf_enabled == 0 && dPriv->numBackClipRects == 0)
   {
      imesa->numClipRects = dPriv->numClipRects;
      imesa->pClipRects = dPriv->pClipRects;
      imesa->drawX = dPriv->x;
      imesa->drawY = dPriv->y;
   } else {
      imesa->numClipRects = dPriv->numBackClipRects;
      imesa->pClipRects = dPriv->pBackClipRects;
      imesa->drawX = dPriv->backX;
      imesa->drawY = dPriv->backY;
   }

   i810EmitDrawingRectangle( imesa );
   imesa->upload_cliprects = GL_TRUE;
}


static void i810XMesaWindowMoved( i810ContextPtr imesa )
{
   /* Determine current color drawing buffer */
   switch (imesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
   case BUFFER_FRONT_LEFT:
      i810XMesaSetFrontClipRects( imesa );
      break;
   case BUFFER_BACK_LEFT:
      i810XMesaSetBackClipRects( imesa );
      break;
   default:
      /* glDrawBuffer(GL_NONE or GL_FRONT_AND_BACK): software fallback */
      i810XMesaSetFrontClipRects( imesa );
   }
}


GLboolean
i810UnbindContext(__DRIcontextPrivate *driContextPriv)
{
   i810ContextPtr imesa = (i810ContextPtr) driContextPriv->driverPrivate;
   if (imesa) {
      imesa->dirty = I810_UPLOAD_CTX|I810_UPLOAD_BUFFERS;
      if (imesa->CurrentTexObj[0]) imesa->dirty |= I810_UPLOAD_TEX0;
      if (imesa->CurrentTexObj[1]) imesa->dirty |= I810_UPLOAD_TEX1;
   }

   return GL_TRUE;
}


GLboolean
i810MakeCurrent(__DRIcontextPrivate *driContextPriv,
                __DRIdrawablePrivate *driDrawPriv,
                __DRIdrawablePrivate *driReadPriv)
{
   if (driContextPriv) {
      i810ContextPtr imesa = (i810ContextPtr) driContextPriv->driverPrivate;

      /* Shouldn't the readbuffer be stored also?
       */
      imesa->driDrawable = driDrawPriv;

      _mesa_make_current(imesa->glCtx,
                         (GLframebuffer *) driDrawPriv->driverPrivate,
                         (GLframebuffer *) driReadPriv->driverPrivate);

      /* Are these necessary?
       */
      i810XMesaWindowMoved( imesa );
   }
   else {
      _mesa_make_current(NULL, NULL, NULL);
   }

   return GL_TRUE;
}

static void
i810UpdatePageFlipping( i810ContextPtr imesa )
{
   GLcontext *ctx = imesa->glCtx;
   int front = 0;

   /* Determine current color drawing buffer */
   switch (ctx->DrawBuffer->_ColorDrawBufferIndexes[0]) {
   case BUFFER_FRONT_LEFT:
      front = 1;
      break;
   case BUFFER_BACK_LEFT:
      front = 0;
      break;
   default:
      return;
   }

   if ( imesa->sarea->pf_current_page == 1 ) 
     front ^= 1;

   driFlipRenderbuffers(ctx->WinSysDrawBuffer, front);
   
   if (front) {
      imesa->BufferSetup[I810_DESTREG_DI1] = imesa->i810Screen->fbOffset | imesa->i810Screen->backPitchBits;
   } else {
      imesa->BufferSetup[I810_DESTREG_DI1] = imesa->i810Screen->backOffset | imesa->i810Screen->backPitchBits;
   }

   imesa->dirty |= I810_UPLOAD_BUFFERS;
}

void i810GetLock( i810ContextPtr imesa, GLuint flags )
{
   __DRIdrawablePrivate *dPriv = imesa->driDrawable;
   __DRIscreenPrivate *sPriv = imesa->driScreen;
   I810SAREAPtr sarea = imesa->sarea;
   int me = imesa->hHWContext;
   unsigned i;

   drmGetLock(imesa->driFd, imesa->hHWContext, flags);

   /* If the window moved, may need to set a new cliprect now.
    *
    * NOTE: This releases and regains the hw lock, so all state
    * checking must be done *after* this call:
    */
   DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);


   /* If we lost context, need to dump all registers to hardware.
    * Note that we don't care about 2d contexts, even if they perform
    * accelerated commands, so the DRI locking in the X server is even
    * more broken than usual.
    */
   if (sarea->ctxOwner != me) {
      driUpdateFramebufferSize(imesa->glCtx, dPriv);
      imesa->upload_cliprects = GL_TRUE;
      imesa->dirty = I810_UPLOAD_CTX|I810_UPLOAD_BUFFERS;
      if (imesa->CurrentTexObj[0]) imesa->dirty |= I810_UPLOAD_TEX0;
      if (imesa->CurrentTexObj[1]) imesa->dirty |= I810_UPLOAD_TEX1;
      sarea->ctxOwner = me;
   }

   /* Shared texture managment - if another client has played with
    * texture space, figure out which if any of our textures have been
    * ejected, and update our global LRU.
    */ 
   for ( i = 0 ; i < imesa->nr_heaps ; i++ ) {
      DRI_AGE_TEXTURES( imesa->texture_heaps[ i ] );
   }

   if (imesa->lastStamp != dPriv->lastStamp) {
      i810UpdatePageFlipping( imesa );
      i810XMesaWindowMoved( imesa );
      imesa->lastStamp = dPriv->lastStamp;
   }
}


void
i810SwapBuffers( __DRIdrawablePrivate *dPriv )
{
   if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
      i810ContextPtr imesa;
      GLcontext *ctx;
      imesa = (i810ContextPtr) dPriv->driContextPriv->driverPrivate;
      ctx = imesa->glCtx;
      if (ctx->Visual.doubleBufferMode) {
         _mesa_notifySwapBuffers( ctx );  /* flush pending rendering comands */
         if ( imesa->sarea->pf_active ) {
            i810PageFlip( dPriv );
         } else {
            i810CopyBuffer( dPriv );
         }
      }
   }
   else {
      /* XXX this shouldn't be an error but we can't handle it for now */
      _mesa_problem(NULL, "i810SwapBuffers: drawable has no context!\n");
   }
}