savage_xmesa.c

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

   imesa->float_depth = driQueryOptionb(&imesa->optionCache, "float_depth") &&
       savageScreen->chipset >= S3_SAVAGE4;
   imesa->no_rast = driQueryOptionb(&imesa->optionCache, "no_rast");

#if 0
   ctx->Const.MinLineWidth = 1.0;
   ctx->Const.MinLineWidthAA = 1.0;
   ctx->Const.MaxLineWidth = 3.0;
   ctx->Const.MaxLineWidthAA = 3.0;
   ctx->Const.LineWidthGranularity = 1.0;
#endif
   
   /* Dri stuff
    */
   imesa->hHWContext = driContextPriv->hHWContext;
   imesa->driFd = sPriv->fd;
   imesa->driHwLock = &sPriv->pSAREA->lock;
   
   imesa->savageScreen = savageScreen;
   imesa->driScreen = sPriv;
   imesa->sarea = saPriv;
   imesa->glBuffer = NULL;
   
   /* DMA buffer */

   for(i=0;i<5;i++)
   {
       imesa->apertureBase[i] = (GLubyte *)savageScreen->aperture.map + 
	   0x01000000 * i;
   }
   
   imesa->aperturePitch = savageScreen->aperturePitch;

   /* change texHeap initialize to support two kind of texture heap*/
   /* here is some parts of initialization, others in InitDriver() */
    
   (void) memset( imesa->textureHeaps, 0, sizeof( imesa->textureHeaps ) );
   make_empty_list( & imesa->swapped );

   textureSize[SAVAGE_CARD_HEAP] = savageScreen->textureSize[SAVAGE_CARD_HEAP];
   textureSize[SAVAGE_AGP_HEAP] = savageScreen->textureSize[SAVAGE_AGP_HEAP];
   imesa->lastTexHeap = savageScreen->texVirtual[SAVAGE_AGP_HEAP] ? 2 : 1;
   switch(driQueryOptioni (&imesa->optionCache, "texture_heaps")) {
   case DRI_CONF_TEXTURE_HEAPS_CARD: /* only use card memory, if available */
       if (textureSize[SAVAGE_CARD_HEAP])
	   imesa->lastTexHeap = 1;
       break;
   case DRI_CONF_TEXTURE_HEAPS_GART: /* only use gart memory, if available */
       if (imesa->lastTexHeap == 2 && textureSize[SAVAGE_AGP_HEAP])
	   textureSize[SAVAGE_CARD_HEAP] = 0;
       break;
   /*default: Nothing to do, use all available memory. */
   }
   
   for (i = 0; i < imesa->lastTexHeap; i++) {
       imesa->textureHeaps[i] = driCreateTextureHeap(
	   i, imesa,
	   textureSize[i],
	   11,					/* 2^11 = 2k alignment */
	   SAVAGE_NR_TEX_REGIONS,
	   (drmTextureRegionPtr)imesa->sarea->texList[i],
	    &imesa->sarea->texAge[i],
	    &imesa->swapped,
	    sizeof( savageTexObj ),
	    (destroy_texture_object_t *) savageDestroyTexObj );
       /* If textureSize[i] == 0 textureHeaps[i] is NULL. This can happen
	* if there is not enough card memory for a card texture heap. */
       if (imesa->textureHeaps[i])
	   driSetTextureSwapCounterLocation( imesa->textureHeaps[i],
					     & imesa->c_textureSwaps );
   }
   imesa->texture_depth = driQueryOptioni (&imesa->optionCache,
					   "texture_depth");
   if (imesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
       imesa->texture_depth = ( savageScreen->cpp == 4 ) ?
	   DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;

   if (savageScreen->chipset >= S3_SAVAGE4)
       ctx->Const.MaxTextureUnits = 2;
   else
       ctx->Const.MaxTextureUnits = 1;
   if (driQueryOptioni(&imesa->optionCache, "texture_units") <
       ctx->Const.MaxTextureUnits)
       ctx->Const.MaxTextureUnits =
	   driQueryOptioni(&imesa->optionCache, "texture_units");
   ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
   ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;

   driCalculateMaxTextureLevels( imesa->textureHeaps,
				 imesa->lastTexHeap,
				 & ctx->Const,
				 4,
				 11, /* max 2D texture size is 2048x2048 */
				 0,  /* 3D textures unsupported. */
				 0,  /* cube textures unsupported. */
				 0,  /* texture rectangles unsupported. */
				 12,
				 GL_FALSE,
				 0 );
   if (ctx->Const.MaxTextureLevels <= 6) { /*spec requires at least 64x64*/
       __driUtilMessage("Not enough texture memory. "
			"Falling back to indirect rendering.");
       Xfree(imesa);
       return GL_FALSE;
   }

   imesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
   imesa->depth_scale = (imesa->savageScreen->zpp == 2) ?
       (1.0F/0xffff):(1.0F/0xffffff);

   imesa->bufferSize = savageScreen->bufferSize;
   imesa->dmaVtxBuf.total = 0;
   imesa->dmaVtxBuf.used = 0;
   imesa->dmaVtxBuf.flushed = 0;

   imesa->clientVtxBuf.total = imesa->bufferSize / 4;
   imesa->clientVtxBuf.used = 0;
   imesa->clientVtxBuf.flushed = 0;
   imesa->clientVtxBuf.buf = (u_int32_t *)malloc(imesa->bufferSize);

   imesa->vtxBuf = &imesa->clientVtxBuf;

   imesa->firstElt = -1;

   /* Uninitialized vertex format. Force setting the vertex state in
    * savageRenderStart.
    */
   imesa->vertex_size = 0;

   /* Utah stuff
    */
   imesa->new_state = ~0;
   imesa->new_gl_state = ~0;
   imesa->RenderIndex = ~0;
   imesa->dirty = ~0;
   imesa->lostContext = GL_TRUE;
   imesa->CurrentTexObj[0] = 0;
   imesa->CurrentTexObj[1] = 0;

   /* 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, savage_pipeline );

   imesa->enable_fastpath = driQueryOptionb(&imesa->optionCache,
					    "enable_fastpath");
   /* DRM versions before 2.1.3 would only render triangle lists. ELTS
    * support was added in 2.2.0. */
   if (imesa->enable_fastpath && sPriv->drm_version.minor < 2) {
      fprintf (stderr,
	       "*** Disabling fast path because your DRM version is buggy "
	       "or doesn't\n*** support ELTS. You need at least Savage DRM "
	       "version 2.2.\n");
      imesa->enable_fastpath = GL_FALSE;
   }

   if (!savageScreen->bufs || savageScreen->chipset == S3_SUPERSAVAGE)
       imesa->enable_vdma = GL_FALSE;
   else
       imesa->enable_vdma = driQueryOptionb(&imesa->optionCache, "enable_vdma");

   imesa->sync_frames = driQueryOptionb(&imesa->optionCache, "sync_frames");

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

   ctx->DriverCtx = (void *) imesa;
   imesa->glCtx = ctx;

#ifndef SAVAGE_DEBUG
   SAVAGE_DEBUG = driParseDebugString( getenv( "SAVAGE_DEBUG" ),
				       debug_control );
#endif

   driInitExtensions( ctx, card_extensions, GL_TRUE );
   if (savageScreen->chipset >= S3_SAVAGE4)
       driInitExtensions( ctx, s4_extensions, GL_FALSE );
   if (ctx->Mesa_DXTn ||
       driQueryOptionb (&imesa->optionCache, "force_s3tc_enable")) {
       _mesa_enable_extension( ctx, "GL_S3_s3tc" );
       if (savageScreen->chipset >= S3_SAVAGE4)
	   /* This extension needs DXT3 and DTX5 support in hardware.
	    * Not available on Savage3D/MX/IX. */
	   _mesa_enable_extension( ctx, "GL_EXT_texture_compression_s3tc" );
   }

   savageDDInitStateFuncs( ctx );
   savageDDInitSpanFuncs( ctx );
   savageDDInitDriverFuncs( ctx );
   savageDDInitIoctlFuncs( ctx );
   savageInitTriFuncs( ctx );

   savageDDInitState( imesa );

   driContextPriv->driverPrivate = (void *) imesa;

   return GL_TRUE;
}

static void
savageDestroyContext(__DRIcontextPrivate *driContextPriv)
{
   savageContextPtr imesa = (savageContextPtr) driContextPriv->driverPrivate;
   GLuint i;

   assert (imesa); /* should never be NULL */
   if (imesa) {
      savageFlushVertices(imesa);
      savageReleaseIndexedVerts(imesa);
      savageFlushCmdBuf(imesa, GL_TRUE); /* release DMA buffer */
      WAIT_IDLE_EMPTY(imesa);

      for (i = 0; i < imesa->lastTexHeap; i++)
	 driDestroyTextureHeap(imesa->textureHeaps[i]);

      free(imesa->cmdBuf.base);
      free(imesa->clientVtxBuf.buf);

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

      /* free the Mesa context */
      imesa->glCtx->DriverCtx = NULL;
      _mesa_destroy_context(imesa->glCtx);

      /* no longer use vertex_dma_buf*/
      Xfree(imesa);
   }
}


static GLboolean
savageCreateBuffer( __DRIscreenPrivate *driScrnPriv,
		    __DRIdrawablePrivate *driDrawPriv,
		    const __GLcontextModes *mesaVis,
		    GLboolean isPixmap)
{
   savageScreenPrivate *screen = (savageScreenPrivate *) driScrnPriv->private;

   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   }
   else {
      GLboolean swStencil = mesaVis->stencilBits > 0 && mesaVis->depthBits != 24;
      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
      /*
       * XXX: this value needs to be set according to the config file
       * setting.  But we don't get that until we create a rendering
       * context!!!!
       */
      GLboolean float_depth = GL_FALSE;

      {
         driRenderbuffer *frontRb
            = driNewRenderbuffer(GL_RGBA,
                                 (GLubyte *) screen->aperture.map
                                 + 0x01000000 * TARGET_FRONT,
                                 screen->cpp,
                                 screen->frontOffset, screen->aperturePitch,
                                 driDrawPriv);
         savageSetSpanFunctions(frontRb, mesaVis, float_depth);
         assert(frontRb->Base.Data);
         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
      }

      if (mesaVis->doubleBufferMode) {
         driRenderbuffer *backRb
            = driNewRenderbuffer(GL_RGBA,
                                 (GLubyte *) screen->aperture.map
                                 + 0x01000000 * TARGET_BACK,
                                 screen->cpp,
                                 screen->backOffset, screen->aperturePitch,
                                 driDrawPriv);
         savageSetSpanFunctions(backRb, mesaVis, float_depth);
         assert(backRb->Base.Data);
         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
      }

      if (mesaVis->depthBits == 16) {
         driRenderbuffer *depthRb
            = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
                                 (GLubyte *) screen->aperture.map
                                 + 0x01000000 * TARGET_DEPTH,
                                 screen->zpp,
                                 screen->depthOffset, screen->aperturePitch,
                                 driDrawPriv);
         savageSetSpanFunctions(depthRb, mesaVis, float_depth);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }
      else if (mesaVis->depthBits == 24) {
         driRenderbuffer *depthRb
            = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
                                 (GLubyte *) screen->aperture.map
                                 + 0x01000000 * TARGET_DEPTH,
                                 screen->zpp,
                                 screen->depthOffset, screen->aperturePitch,
                                 driDrawPriv);
         savageSetSpanFunctions(depthRb, mesaVis, float_depth);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }

      if (mesaVis->stencilBits > 0 && !swStencil) {
         driRenderbuffer *stencilRb
            = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
                                 (GLubyte *) screen->aperture.map
                                 + 0x01000000 * TARGET_DEPTH,
                                 screen->zpp,
                                 screen->depthOffset, screen->aperturePitch,
                                 driDrawPriv);
         savageSetSpanFunctions(stencilRb, mesaVis, float_depth);
         _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
      }

      _mesa_add_soft_renderbuffers(fb,
                                   GL_FALSE, /* color */
                                   GL_FALSE, /* depth */
                                   swStencil,
                                   mesaVis->accumRedBits > 0,
                                   GL_FALSE, /* alpha */
                                   GL_FALSE /* aux */);
      driDrawPriv->driverPrivate = (void *) fb;

      return (driDrawPriv->driverPrivate != NULL);
   }
}