src/mesa/drivers/dri/i965/brw_fallback.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2005 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 "swrast_setup/swrast_setup.h"
  29 #include "swrast/swrast.h"
  30 #include "tnl/tnl.h"
  31 #include "context.h"
  32 #include "brw_context.h"
  33 #include "brw_fallback.h"
  34
  35 #include "glheader.h"
  36 #include "enums.h"
  37 #include "glapi.h"
  38 #include "imports.h"
  39 #include "macros.h"
  40 #include "mtypes.h"
  41
  42 #define FILE_DEBUG_FLAG DEBUG_FALLBACKS
  43
  44 static GLboolean do_check_fallback(struct brw_context *brw)
  45 {
  46    GLcontext *ctx = &brw->intel.ctx;
  47    GLuint i;
  48
  49    /* BRW_NEW_METAOPS
  50     */
  51    if (brw->metaops.active)
  52       return GL_FALSE;
  53
  54    if (brw->intel.no_rast) {
  55       DBG("FALLBACK: rasterization disabled\n");
  56       return GL_TRUE;
  57    }
  58
  59    /* _NEW_RENDERMODE
  60     *
  61     * XXX: need to save/restore RenderMode in metaops state, or
  62     * somehow move to a new attribs pointer:
  63     */
  64    if (ctx->RenderMode != GL_RENDER) {
  65       DBG("FALLBACK: render mode\n");
  66       return GL_TRUE;
  67    }
  68
  69    /* _NEW_TEXTURE:
  70     */
  71    for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
  72       struct gl_texture_unit *texUnit = &brw->attribs.Texture->Unit[i];
  73       if (texUnit->_ReallyEnabled) {
  74          struct intel_texture_object *intelObj = intel_texture_object(texUnit->_Current);
  75          struct gl_texture_image *texImage = intelObj->base.Image[0][intelObj->firstLevel];
  76          if (texImage->Border ||
  77          ((texImage->_BaseFormat == GL_DEPTH_COMPONENT) &&
  78           ((texImage->TexObject->WrapS == GL_CLAMP_TO_BORDER) ||
  79            (texImage->TexObject->WrapT == GL_CLAMP_TO_BORDER)))) {
  80             DBG("FALLBACK: texture border\n");
  81             return GL_TRUE;
  82          }
  83       }
  84    }
  85
  86    /* _NEW_STENCIL
  87     */
  88    if (brw->attribs.Stencil->Enabled &&
  89        !brw->intel.hw_stencil) {
  90       DBG("FALLBACK: stencil\n");
  91       return GL_TRUE;
  92    }
  93
  94
  95    return GL_FALSE;
  96 }
  97
  98 static void check_fallback(struct brw_context *brw)
  99 {
 100    brw->intel.Fallback = do_check_fallback(brw);
 101 }
 102
 103 const struct brw_tracked_state brw_check_fallback = {
 104    .dirty = {
 105       .mesa = _NEW_BUFFERS | _NEW_RENDERMODE | _NEW_TEXTURE | _NEW_STENCIL,
 106       .brw  = BRW_NEW_METAOPS,
 107       .cache = 0
 108    },
 109    .prepare = check_fallback
 110 };
 111
 112
 113
 114
 115 /* Not used:
 116  */
 117 void intelFallback( struct intel_context *intel, GLuint bit, GLboolean mode )
 118 {
 119 }
 120
 121
 122