src/mesa/shader/slang/slang_analyse.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file slang_analyse.c
  27  * slang assembly code analysis
  28  * \author Michal Krol
  29  */
  30
  31 #include "imports.h"
  32 #include "slang_analyse.h"
  33 #include "slang_utility.h"
  34
  35 GLboolean _slang_analyse_texture_usage (slang_program *prog)
  36 {
  37         GLuint i, count = 0;
  38
  39         slang_texture_usages_dtr (&prog->texture_usage);
  40         slang_texture_usages_ctr (&prog->texture_usage);
  41
  42         /*
  43          * We could do a full code analysis to find out which uniforms are actually used.
  44          * For now, we are very conservative and extract them from uniform binding table, which
  45          * in turn also do not come from code analysis.
  46          */
  47
  48         for (i = 0; i < prog->uniforms.count; i++)
  49         {
  50                 slang_uniform_binding *b = &prog->uniforms.table[i];
  51
  52                 if (b->address[SLANG_SHADER_FRAGMENT] != ~0 && b->quant->structure == NULL)
  53                 {
  54                         switch (b->quant->u.basic_type)
  55                         {
  56                         case GL_SAMPLER_1D_ARB:
  57                         case GL_SAMPLER_2D_ARB:
  58                         case GL_SAMPLER_3D_ARB:
  59                         case GL_SAMPLER_CUBE_ARB:
  60                         case GL_SAMPLER_1D_SHADOW_ARB:
  61                         case GL_SAMPLER_2D_SHADOW_ARB:
  62                                 count++;
  63                                 break;
  64                         }
  65                 }
  66         }
  67
  68         if (count == 0)
  69                 return GL_TRUE;
  70         prog->texture_usage.table = (slang_texture_usage *) slang_alloc_malloc (
  71                 count * sizeof (slang_texture_usage));
  72         if (prog->texture_usage.table == NULL)
  73                 return GL_FALSE;
  74         prog->texture_usage.count = count;
  75
  76         for (count = i = 0; i < prog->uniforms.count; i++)
  77         {
  78                 slang_uniform_binding *b = &prog->uniforms.table[i];
  79
  80                 if (b->address[SLANG_SHADER_FRAGMENT] != ~0 && b->quant->structure == NULL)
  81                 {
  82                         switch (b->quant->u.basic_type)
  83                         {
  84                         case GL_SAMPLER_1D_ARB:
  85                         case GL_SAMPLER_2D_ARB:
  86                         case GL_SAMPLER_3D_ARB:
  87                         case GL_SAMPLER_CUBE_ARB:
  88                         case GL_SAMPLER_1D_SHADOW_ARB:
  89                         case GL_SAMPLER_2D_SHADOW_ARB:
  90                                 prog->texture_usage.table[count].quant = b->quant;
  91                                 prog->texture_usage.table[count].frag_address = b->address[SLANG_SHADER_FRAGMENT];
  92                                 count++;
  93                                 break;
  94                         }
  95                 }
  96         }
  97
  98         return GL_TRUE;
  99 }
 100