src/mesa/drivers/dri/i915/i830_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "i830_context.h"
  29 #include "imports.h"
  30 #include "texmem.h"
  31 #include "intel_tex.h"
  32 #include "tnl/tnl.h"
  33 #include "tnl/t_vertex.h"
  34 #include "tnl/t_context.h"
  35
  36
  37 /***************************************
  38  * Mesa's Driver Functions
  39  ***************************************/
  40
  41 static const char * const card_extensions[] =
  42 {
  43    "GL_ARB_texture_env_crossbar",
  44    "GL_NV_blend_square",
  45    NULL
  46 };
  47
  48
  49 static void i830InitDriverFunctions( struct dd_function_table *functions )
  50 {
  51    intelInitDriverFunctions( functions );
  52    i830InitStateFuncs( functions );
  53    i830InitTextureFuncs( functions );
  54 }
  55
  56
  57 GLboolean i830CreateContext( const __GLcontextModes *mesaVis,
  58                             __DRIcontextPrivate *driContextPriv,
  59                             void *sharedContextPrivate)
  60 {
  61    struct dd_function_table functions;
  62    i830ContextPtr i830 = (i830ContextPtr) CALLOC_STRUCT(i830_context);
  63    intelContextPtr intel = &i830->intel;
  64    GLcontext *ctx = &intel->ctx;
  65    if (!i830) return GL_FALSE;
  66
  67    i830InitVtbl( i830 );
  68    i830InitDriverFunctions( &functions );
  69
  70    if (!intelInitContext( intel, mesaVis, driContextPriv,
  71                           sharedContextPrivate, &functions )) {
  72       FREE(i830);
  73       return GL_FALSE;
  74    }
  75
  76    intel->ctx.Const.MaxTextureUnits = I830_TEX_UNITS;
  77    intel->ctx.Const.MaxTextureImageUnits = I830_TEX_UNITS;
  78    intel->ctx.Const.MaxTextureCoordUnits = I830_TEX_UNITS;
  79
  80    intel->nr_heaps = 1;
  81    intel->texture_heaps[0] =
  82       driCreateTextureHeap( 0, intel,
  83                             intel->intelScreen->textureSize,
  84                             12,
  85                             I830_NR_TEX_REGIONS,
  86                             intel->sarea->texList,
  87                             & intel->sarea->texAge,
  88                             & intel->swapped,
  89                             sizeof( struct i830_texture_object ),
  90                             (destroy_texture_object_t *)intelDestroyTexObj );
  91
  92    /* FIXME: driCalculateMaxTextureLevels assumes that mipmaps are tightly
  93     * FIXME: packed, but they're not in Intel graphics hardware.
  94     */
  95    intel->ctx.Const.MaxTextureUnits = 1;
  96    driCalculateMaxTextureLevels( intel->texture_heaps,
  97                                  intel->nr_heaps,
  98                                  &intel->ctx.Const,
  99                                  4,
 100                                  11, /* max 2D texture size is 2048x2048 */
 101                                  8,  /* max 3D texture size is 256^3 */
 102                                  10, /* max CUBE texture size is 1024x1024 */
 103                                  11, /* max RECT. supported */
 104                                  12,
 105                                  GL_FALSE );
 106    intel->ctx.Const.MaxTextureUnits = I830_TEX_UNITS;
 107
 108    _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12,
 109                        18 * sizeof(GLfloat) );
 110
 111    intel->verts = TNL_CONTEXT(ctx)->clipspace.vertex_buf;
 112
 113    driInitExtensions( ctx, card_extensions, GL_FALSE );
 114
 115    i830InitState( i830 );
 116
 117
 118    _tnl_allow_vertex_fog( ctx, 1 );
 119    _tnl_allow_pixel_fog( ctx, 0 );
 120
 121    return GL_TRUE;
 122 }
 123