src/mesa/shader/program_parse_extra.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <string.h>
  25 #include "main/mtypes.h"
  26 #include "prog_instruction.h"
  27 #include "program_parser.h"
  28
  29
  30 /**
  31  * Extra assembly-level parser routines
  32  *
  33  * \author Ian Romanick <ian.d.romanick@intel.com>
  34  */
  35
  36 int
  37 _mesa_ARBvp_parse_option(struct asm_parser_state *state, const char *option)
  38 {
  39    if (strcmp(option, "ARB_position_invariant") == 0) {
  40       state->option.PositionInvariant = 1;
  41       return 1;
  42    }
  43
  44    return 0;
  45 }
  46
  47
  48 int
  49 _mesa_ARBfp_parse_option(struct asm_parser_state *state, const char *option)
  50 {
  51    /* All of the options currently supported start with "ARB_".  The code is
  52     * currently structured with nested if-statements because eventually options
  53     * that start with "NV_" will be supported.  This structure will result in
  54     * less churn when those options are added.
  55     */
  56    if (strncmp(option, "ARB_", 4) == 0) {
  57       /* Advance the pointer past the "ARB_" prefix.
  58        */
  59       option += 4;
  60
  61
  62       if (strncmp(option, "fog_", 4) == 0) {
  63          option += 4;
  64
  65          if (state->option.Fog == OPTION_NONE) {
  66             if (strcmp(option, "exp") == 0) {
  67                state->option.Fog = OPTION_FOG_EXP;
  68                return 1;
  69             } else if (strcmp(option, "exp2") == 0) {
  70                state->option.Fog = OPTION_FOG_EXP2;
  71                return 1;
  72             } else if (strcmp(option, "linear") == 0) {
  73                state->option.Fog = OPTION_FOG_LINEAR;
  74                return 1;
  75             }
  76          }
  77
  78          return 0;
  79       } else if (strncmp(option, "precision_hint_", 15) == 0) {
  80          option += 15;
  81
  82          if (state->option.PrecisionHint == OPTION_NONE) {
  83             if (strcmp(option, "nicest") == 0) {
  84                state->option.PrecisionHint = OPTION_NICEST;
  85                return 1;
  86             } else if (strcmp(option, "fastest") == 0) {
  87                state->option.PrecisionHint = OPTION_FASTEST;
  88                return 1;
  89             }
  90          }
  91
  92          return 0;
  93       } else if (strcmp(option, "draw_buffers") == 0) {
  94          /* Don't need to check extension availability because all Mesa-based
  95           * drivers support GL_ARB_draw_buffers.
  96           */
  97          state->option.DrawBuffers = 1;
  98          return 1;
  99       } else if (strcmp(option, "fragment_program_shadow") == 0) {
 100          if (state->ctx->Extensions.ARB_fragment_program_shadow) {
 101             state->option.Shadow = 1;
 102             return 1;
 103          }
 104       }
 105    } else if (strncmp(option, "MESA_", 5) == 0) {
 106       option += 5;
 107
 108       if (strcmp(option, "texture_array") == 0) {
 109          if (state->ctx->Extensions.MESA_texture_array) {
 110             state->option.TexArray = 1;
 111             return 1;
 112          }
 113       }
 114    }
 115
 116    return 0;
 117 }