src/mesa/swrast/s_arbshader.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  * Authors:
  25  *    Michal Krol
  26  */
  27
  28 #include "glheader.h"
  29 #include "context.h"
  30 #include "colormac.h"
  31 #include "s_arbshader.h"
  32 #include "s_context.h"
  33 #include "shaderobjects.h"
  34 #include "shaderobjects_3dlabs.h"
  35 #include "slang_utility.h"
  36 #include "slang_link.h"
  37
  38 void _swrast_exec_arbshader (GLcontext *ctx, struct sw_span *span)
  39 {
  40         struct gl2_program_intf **pro;
  41         GLuint i;
  42
  43         if (!ctx->ShaderObjects._FragmentShaderPresent)
  44                 return;
  45         pro = ctx->ShaderObjects.CurrentProgram;
  46         if (!ctx->ShaderObjects._VertexShaderPresent)
  47                 (**pro).UpdateFixedUniforms (pro);
  48
  49         for (i = span->start; i < span->end; i++)
  50         {
  51                 /* only run shader on active fragments */
  52                 if (span->array->mask[i]) {
  53                 GLfloat vec[4];
  54                 GLuint j;
  55                 GLboolean discard;
  56
  57                 vec[0] = (GLfloat) span->x + i;
  58                 vec[1] = (GLfloat) span->y;
  59                 vec[2] = (GLfloat) span->array->z[i] / ctx->DrawBuffer->_DepthMaxF;
  60                 vec[3] = span->w + span->dwdx * i;
  61                 (**pro).UpdateFixedVarying (pro, SLANG_FRAGMENT_FIXED_FRAGCOORD, vec, 0,
  62                         4 * sizeof (GLfloat), GL_TRUE);
  63                 vec[0] = CHAN_TO_FLOAT(span->array->rgba[i][RCOMP]);
  64                 vec[1] = CHAN_TO_FLOAT(span->array->rgba[i][GCOMP]);
  65                 vec[2] = CHAN_TO_FLOAT(span->array->rgba[i][BCOMP]);
  66                 vec[3] = CHAN_TO_FLOAT(span->array->rgba[i][ACOMP]);
  67                 (**pro).UpdateFixedVarying (pro, SLANG_FRAGMENT_FIXED_COLOR, vec, 0, 4 * sizeof (GLfloat),
  68                         GL_TRUE);
  69                 for (j = 0; j < ctx->Const.MaxTextureCoordUnits; j++)
  70                 {
  71                         vec[0] = span->array->texcoords[j][i][0];
  72                         vec[1] = span->array->texcoords[j][i][1];
  73                         vec[2] = span->array->texcoords[j][i][2];
  74                         vec[3] = span->array->texcoords[j][i][3];
  75                         (**pro).UpdateFixedVarying (pro, SLANG_FRAGMENT_FIXED_TEXCOORD, vec, j,
  76                                 4 * sizeof (GLfloat), GL_TRUE);
  77                 }
  78                 for (j = 0; j < MAX_VARYING_VECTORS; j++)
  79                 {
  80                         GLuint k;
  81
  82                         for (k = 0; k < VARYINGS_PER_VECTOR; k++)
  83                         {
  84                                 (**pro).UpdateVarying (pro, j * VARYINGS_PER_VECTOR + k,
  85                                         &span->array->varying[i][j][k], GL_FALSE);
  86                         }
  87                 }
  88
  89                 _slang_exec_fragment_shader (pro);
  90
  91                 _slang_fetch_discard (pro, &discard);
  92                 if (discard)
  93                 {
  94                         span->array->mask[i] = GL_FALSE;
  95                         span->writeAll = GL_FALSE;
  96                 }
  97                 else
  98                 {
  99                         (**pro).UpdateFixedVarying (pro, SLANG_FRAGMENT_FIXED_FRAGCOLOR, vec, 0,
 100                                 4 * sizeof (GLfloat), GL_FALSE);
 101                         UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][RCOMP], vec[0]);
 102                         UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][GCOMP], vec[1]);
 103                         UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][BCOMP], vec[2]);
 104                         UNCLAMPED_FLOAT_TO_CHAN(span->array->rgba[i][ACOMP], vec[3]);
 105                 }
 106                 }
 107         }
 108 }
 109