i830_context.c

mesa-6.5-minigui源码

/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#include "i830_context.h"
#include "imports.h"
#include "texmem.h"
#include "intel_tex.h"
#include "tnl/tnl.h"
#include "tnl/t_vertex.h"
#include "tnl/t_context.h"
#include "utils.h"

/***************************************
 * Mesa's Driver Functions
 ***************************************/

static const struct dri_extension i830_extensions[] =
{
    { "GL_ARB_texture_env_crossbar",       NULL },
    { NULL,                                NULL }
};


static void i830InitDriverFunctions( struct dd_function_table *functions )
{
   intelInitDriverFunctions( functions );
   i830InitStateFuncs( functions );
   i830InitTextureFuncs( functions );
}


GLboolean i830CreateContext( const __GLcontextModes *mesaVis,
			    __DRIcontextPrivate *driContextPriv,
			    void *sharedContextPrivate)
{
   struct dd_function_table functions;
   i830ContextPtr i830 = (i830ContextPtr) CALLOC_STRUCT(i830_context);
   intelContextPtr intel = &i830->intel;
   GLcontext *ctx = &intel->ctx;
   GLuint i;
   if (!i830) return GL_FALSE;

   i830InitVtbl( i830 );
   i830InitDriverFunctions( &functions );

   if (!intelInitContext( intel, mesaVis, driContextPriv,
			  sharedContextPrivate, &functions )) {
      FREE(i830);
      return GL_FALSE;
   }

   intel->ctx.Const.MaxTextureUnits = I830_TEX_UNITS;
   intel->ctx.Const.MaxTextureImageUnits = I830_TEX_UNITS;
   intel->ctx.Const.MaxTextureCoordUnits = I830_TEX_UNITS;

   intel->nr_heaps = 1;
   intel->texture_heaps[0] = 
      driCreateTextureHeap( 0, intel,
			    intel->intelScreen->tex.size,
			    12,
			    I830_NR_TEX_REGIONS,
			    intel->sarea->texList,
			    & intel->sarea->texAge,
			    & intel->swapped,
			    sizeof( struct i830_texture_object ),
			    (destroy_texture_object_t *)intelDestroyTexObj );

   /* FIXME: driCalculateMaxTextureLevels assumes that mipmaps are tightly
    * FIXME: packed, but they're not in Intel graphics hardware.
    */
   intel->ctx.Const.MaxTextureUnits = I830_TEX_UNITS;
   i = driQueryOptioni( &intel->intelScreen->optionCache, "allow_large_textures");
   driCalculateMaxTextureLevels( intel->texture_heaps,
				 intel->nr_heaps,
				 &intel->ctx.Const,
				 4,
				 11, /* max 2D texture size is 2048x2048 */
				 8,  /* max 3D texture size is 256^3 */
				 10, /* max CUBE texture size is 1024x1024 */
				 11, /* max RECT. supported */
				 12,
				 GL_FALSE,
				 i );

   _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12, 
		       18 * sizeof(GLfloat) );

   intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;

   driInitExtensions( ctx, i830_extensions, GL_FALSE );

   i830InitState( i830 );


   _tnl_allow_vertex_fog( ctx, 1 ); 
   _tnl_allow_pixel_fog( ctx, 0 ); 

   return GL_TRUE;
}