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