src/mesa/drivers/dri/i965/brw_nir_uniforms.cpp

   1 /*
   2  * Copyright © 2015 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_shader.h"
  25 #include "brw_nir.h"
  26
  27 void
  28 brw_nir_setup_arb_uniforms(nir_shader *shader, struct gl_program *prog,
  29                            struct brw_stage_prog_data *stage_prog_data)
  30 {
  31    struct gl_program_parameter_list *plist = prog->Parameters;
  32
  33 #ifndef NDEBUG
  34    if (!shader->uniforms.is_empty()) {
  35       /* For ARB programs, only a single "parameters" variable is generated to
  36        * support uniform data.
  37        */
  38       assert(shader->uniforms.length() == 1);
  39       nir_variable *var = (nir_variable *) shader->uniforms.get_head();
  40       assert(strcmp(var->name, "parameters") == 0);
  41       assert(var->type->array_size() == (int)plist->NumParameters);
  42    }
  43 #endif
  44
  45    for (unsigned p = 0; p < plist->NumParameters; p++) {
  46       /* Parameters should be either vec4 uniforms or single component
  47        * constants; matrices and other larger types should have been broken
  48        * down earlier.
  49        */
  50       assert(plist->Parameters[p].Size <= 4);
  51
  52       unsigned i;
  53       for (i = 0; i < plist->Parameters[p].Size; i++) {
  54          stage_prog_data->param[4 * p + i] = &plist->ParameterValues[p][i];
  55       }
  56       for (; i < 4; i++) {
  57          static const gl_constant_value zero = { 0.0 };
  58          stage_prog_data->param[4 * p + i] = &zero;
  59       }
  60    }
  61 }