mga_xmesa.c

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

      fprintf(stderr, "mgaDestroyScreen\n");

   drmUnmapBufs(mgaScreen->bufs);


   /* free all option information */
   driDestroyOptionInfo (&mgaScreen->optionCache);

   FREE(mgaScreen);
   sPriv->private = NULL;
}


extern const struct tnl_pipeline_stage _mga_render_stage;

static const struct tnl_pipeline_stage *mga_pipeline[] = {
   &_tnl_vertex_transform_stage, 
   &_tnl_normal_transform_stage, 
   &_tnl_lighting_stage,	
   &_tnl_fog_coordinate_stage,
   &_tnl_texgen_stage, 
   &_tnl_texture_transform_stage, 
   &_tnl_vertex_program_stage,

				/* REMOVE: point attenuation stage */
#if 0
   &_mga_render_stage,		/* ADD: unclipped rastersetup-to-dma */
                                /* Need new ioctl for wacceptseq */
#endif
   &_tnl_render_stage,		
   0,
};


static const struct dri_extension g400_extensions[] =
{
   { "GL_ARB_multitexture",           NULL },
   { "GL_ARB_texture_env_add",        NULL },
   { "GL_ARB_texture_env_combine",    NULL },
   { "GL_ARB_texture_env_crossbar",   NULL },
   { "GL_EXT_texture_env_combine",    NULL },
   { "GL_EXT_texture_edge_clamp",     NULL },
   { "GL_ATI_texture_env_combine3",   NULL },
   { NULL,                            NULL }
};

static const struct dri_extension card_extensions[] =
{
   { "GL_ARB_multisample",            GL_ARB_multisample_functions },
   { "GL_ARB_texture_compression",    GL_ARB_texture_compression_functions },
   { "GL_ARB_texture_rectangle",      NULL },
   { "GL_ARB_vertex_buffer_object",   GL_ARB_vertex_buffer_object_functions },
   { "GL_EXT_blend_logic_op",         NULL },
   { "GL_EXT_fog_coord",              GL_EXT_fog_coord_functions },
   { "GL_EXT_multi_draw_arrays",      GL_EXT_multi_draw_arrays_functions },
   /* paletted_textures currently doesn't work, but we could fix them later */
#if defined( need_GL_EXT_paletted_texture )
   { "GL_EXT_shared_texture_palette", NULL },
   { "GL_EXT_paletted_texture",       GL_EXT_paletted_texture_functions },
#endif
   { "GL_EXT_secondary_color",        GL_EXT_secondary_color_functions },
   { "GL_EXT_stencil_wrap",           NULL },
   { "GL_APPLE_vertex_array_object",  GL_APPLE_vertex_array_object_functions },
   { "GL_MESA_ycbcr_texture",         NULL },
   { "GL_SGIS_generate_mipmap",       NULL },
   { NULL,                            NULL }
};

static const struct dri_extension ARB_vp_extensions[] = {
   { "GL_ARB_vertex_program",         GL_ARB_vertex_program_functions },
   { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
   { NULL,                            NULL }
};

static const struct dri_extension NV_vp_extensions[] = {
   { "GL_NV_vertex_program",          GL_NV_vertex_program_functions },
   { "GL_NV_vertex_program1_1",       NULL },
   { NULL,                            NULL }
};

static const struct dri_debug_control debug_control[] =
{
    { "fall",  DEBUG_VERBOSE_FALLBACK },
    { "tex",   DEBUG_VERBOSE_TEXTURE },
    { "ioctl", DEBUG_VERBOSE_IOCTL },
    { "verb",  DEBUG_VERBOSE_MSG },
    { "dri",   DEBUG_VERBOSE_DRI },
    { NULL,    0 }
};


static GLboolean
mgaCreateContext( const __GLcontextModes *mesaVis,
                  __DRIcontextPrivate *driContextPriv,
                  void *sharedContextPrivate )
{
   int i;
   unsigned   maxlevels;
   GLcontext *ctx, *shareCtx;
   mgaContextPtr mmesa;
   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
   mgaScreenPrivate *mgaScreen = (mgaScreenPrivate *)sPriv->private;
   drm_mga_sarea_t *saPriv = (drm_mga_sarea_t *)(((char*)sPriv->pSAREA)+
					      mgaScreen->sarea_priv_offset);
   struct dd_function_table functions;

   if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
      fprintf(stderr, "mgaCreateContext\n");

   /* allocate mga context */
   mmesa = (mgaContextPtr) CALLOC(sizeof(mgaContext));
   if (!mmesa) {
      return GL_FALSE;
   }

   /* Init default driver functions then plug in our Radeon-specific functions
    * (the texture functions are especially important)
    */
   _mesa_init_driver_functions( &functions );
   mgaInitDriverFuncs( &functions );
   mgaInitTextureFuncs( &functions );
   mgaInitIoctlFuncs( &functions );

   /* Allocate the Mesa context */
   if (sharedContextPrivate)
      shareCtx = ((mgaContextPtr) sharedContextPrivate)->glCtx;
   else 
      shareCtx = NULL;
   mmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
                                       &functions, (void *) mmesa);
   if (!mmesa->glCtx) {
      FREE(mmesa);
      return GL_FALSE;
   }
   driContextPriv->driverPrivate = mmesa;

   /* Init mga state */
   mmesa->hHWContext = driContextPriv->hHWContext;
   mmesa->driFd = sPriv->fd;
   mmesa->driHwLock = &sPriv->pSAREA->lock;

   mmesa->mgaScreen = mgaScreen;
   mmesa->driScreen = sPriv;
   mmesa->sarea = (void *)saPriv;

   /* Parse configuration files */
   driParseConfigFiles (&mmesa->optionCache, &mgaScreen->optionCache,
                        sPriv->myNum, "mga");

   (void) memset( mmesa->texture_heaps, 0, sizeof( mmesa->texture_heaps ) );
   make_empty_list( & mmesa->swapped );

   mmesa->nr_heaps = mgaScreen->texVirtual[MGA_AGP_HEAP] ? 2 : 1;
   for ( i = 0 ; i < mmesa->nr_heaps ; i++ ) {
      mmesa->texture_heaps[i] = driCreateTextureHeap( i, mmesa,
	    mgaScreen->textureSize[i],
	    6,
	    MGA_NR_TEX_REGIONS,
	    (drmTextureRegionPtr)mmesa->sarea->texList[i],
	    &mmesa->sarea->texAge[i],
	    &mmesa->swapped,
	    sizeof( mgaTextureObject_t ),
	    (destroy_texture_object_t *) mgaDestroyTexObj );
   }

   /* Set the maximum texture size small enough that we can guarentee
    * that both texture units can bind a maximal texture and have them
    * on the card at once.
    */
   ctx = mmesa->glCtx;
   if ( mgaScreen->chipset == MGA_CARD_TYPE_G200 ) {
      ctx->Const.MaxTextureUnits = 1;
      ctx->Const.MaxTextureImageUnits = 1;
      ctx->Const.MaxTextureCoordUnits = 1;
      maxlevels = G200_TEX_MAXLEVELS;

   }
   else {
      ctx->Const.MaxTextureUnits = 2;
      ctx->Const.MaxTextureImageUnits = 2;
      ctx->Const.MaxTextureCoordUnits = 2;
      maxlevels = G400_TEX_MAXLEVELS;
   }

   driCalculateMaxTextureLevels( mmesa->texture_heaps,
				 mmesa->nr_heaps,
				 & ctx->Const,
				 4,
				 11, /* max 2D texture size is 2048x2048 */
				 0,  /* 3D textures unsupported. */
				 0,  /* cube textures unsupported. */
				 11, /* max texture rect size is 2048x2048 */
				 maxlevels,
				 GL_FALSE,
				 0 );

   ctx->Const.MinLineWidth = 1.0;
   ctx->Const.MinLineWidthAA = 1.0;
   ctx->Const.MaxLineWidth = 10.0;
   ctx->Const.MaxLineWidthAA = 10.0;
   ctx->Const.LineWidthGranularity = 1.0;

   mmesa->texture_depth = driQueryOptioni (&mmesa->optionCache,
					   "texture_depth");
   if (mmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FB)
      mmesa->texture_depth = ( mesaVis->rgbBits >= 24 ) ?
	 DRI_CONF_TEXTURE_DEPTH_32 : DRI_CONF_TEXTURE_DEPTH_16;
   mmesa->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;

   switch (mesaVis->depthBits) {
   case 16: 
      mmesa->depth_scale = 1.0/(GLdouble)0xffff; 
      mmesa->depth_clear_mask = ~0;
      mmesa->ClearDepth = 0xffff;
      break;
   case 24:
      mmesa->depth_scale = 1.0/(GLdouble)0xffffff;
      if (mmesa->hw_stencil) {
	 mmesa->depth_clear_mask = 0xffffff00;
	 mmesa->stencil_clear_mask = 0x000000ff;
      } else
	 mmesa->depth_clear_mask = ~0;
      mmesa->ClearDepth = 0xffffff00;
      break;
   case 32:
      mmesa->depth_scale = 1.0/(GLdouble)0xffffffff;
      mmesa->depth_clear_mask = ~0;
      mmesa->ClearDepth = 0xffffffff;
      break;
   };

   mmesa->haveHwStipple = GL_FALSE;
   mmesa->RenderIndex = -1;		/* impossible value */
   mmesa->dirty = ~0;
   mmesa->vertex_format = 0;   
   mmesa->CurrentTexObj[0] = 0;
   mmesa->CurrentTexObj[1] = 0;
   mmesa->tmu_source[0] = 0;
   mmesa->tmu_source[1] = 1;

   mmesa->texAge[0] = 0;
   mmesa->texAge[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, mga_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 );

   mmesa->primary_offset = mmesa->mgaScreen->primary.handle;

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

   driInitExtensions( ctx, card_extensions, GL_FALSE );

   if (MGA_IS_G400(MGA_CONTEXT(ctx))) {
      driInitExtensions( ctx, g400_extensions, GL_FALSE );
   }

   if ( driQueryOptionb( &mmesa->optionCache, "arb_vertex_program" ) ) {
      driInitExtensions(ctx, ARB_vp_extensions, GL_FALSE);
   }
   
   if ( driQueryOptionb( &mmesa->optionCache, "nv_vertex_program" ) ) {
      driInitExtensions( ctx, NV_vp_extensions, GL_FALSE );
   }

	
   /* XXX these should really go right after _mesa_init_driver_functions() */
   mgaDDInitStateFuncs( ctx );
   mgaDDInitSpanFuncs( ctx );
   mgaDDInitPixelFuncs( ctx );
   mgaDDInitTriFuncs( ctx );

   mgaInitVB( ctx );
   mgaInitState( mmesa );

   driContextPriv->driverPrivate = (void *) mmesa;

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

   (*sPriv->systemTime->getUST)( & mmesa->swap_ust );

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

   return GL_TRUE;
}

static void
mgaDestroyContext(__DRIcontextPrivate *driContextPriv)
{
   mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;

   if (MGA_DEBUG&DEBUG_VERBOSE_DRI)
      fprintf( stderr, "[%s:%d] mgaDestroyContext start\n",
	       __FILE__, __LINE__ );

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


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

      mgaFreeVB( mmesa->glCtx );

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