tests/spec/arb_shader_atomic_counters/default-partition.c

   1 /*
   2  * Copyright © 2013 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 /** @file default-partition.c
  25  *
  26  *  Test that the following is met:
  27  *
  28  *  "Unlike other user-defined uniforms declared at global scope,
  29  *   [atomic counters] take NO storage from the default partition,
  30  *   they have NO location [...]"
  31  *
  32  * (from the ARB_shader_atomic_counters specification)
  33  */
  34
  35 #include "common.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_core_version = 31;
  40
  41         config.window_width = 1;
  42         config.window_height = 1;
  43         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static bool
  49 run_test(unsigned max_uniforms)
  50 {
  51         const char *fs_template = "#version 140\n"
  52                 "#extension GL_ARB_shader_atomic_counters : enable\n"
  53                 "\n"
  54                 "#define N %d\n"
  55                 "\n"
  56                 "out ivec4 fcolor;\n"
  57                 "layout(binding=0) uniform atomic_uint x;\n"
  58                 "uniform uint y[N];\n"
  59                 "\n"
  60                 "void main() {\n"
  61                 "       int i;\n"
  62                 "       uint z = atomicCounter(x);\n"
  63                 "       \n"
  64                 "       for (i = 0; i < N; ++i)\n"
  65                 "               z += y[i];\n"
  66                 "       \n"
  67                 "       fcolor.x = int(z);\n"
  68                 "}\n";
  69         char *fs_source;
  70         GLuint prog = glCreateProgram();
  71         int n = 0, ret;
  72
  73         ret = asprintf(&fs_source, fs_template, max_uniforms);
  74         assert(ret > 0);
  75
  76         /* This should fail to link if 'x' ended up being accounted in
  77          * the default uniform partition because 'y[]' uses up the
  78          * whole available uniform space. */
  79         atomic_counters_compile(prog, GL_FRAGMENT_SHADER, fs_source);
  80         glLinkProgram(prog);
  81         if (!piglit_check_gl_error(GL_NO_ERROR))
  82                 return false;
  83
  84         glGetProgramiv(prog, GL_ACTIVE_UNIFORMS, &n);
  85         if (n != 2) {
  86                 printf("Unexpected number of active uniforms %d.\n", n);
  87                 return false;
  88         }
  89
  90         if (glGetUniformLocation(prog, "x") != -1) {
  91                 printf("Atomic counter unexpectedly reported to have a"
  92                        " location.\n");
  93                 return false;
  94         }
  95
  96         free(fs_source);
  97         glDeleteProgram(prog);
  98         return true;
  99 }
 100
 101 void
 102 piglit_init(int argc, char **argv)
 103 {
 104         struct atomic_counters_limits ls = atomic_counters_get_limits();
 105         enum piglit_result status = PIGLIT_PASS;
 106
 107         piglit_require_gl_version(31);
 108         piglit_require_extension("GL_ARB_shader_atomic_counters");
 109
 110         atomic_counters_subtest(&status, GL_FRAGMENT_SHADER,
 111                                 "Atomic counter location",
 112                                 run_test, ls.uniform_components);
 113
 114         piglit_report_result(status);
 115 }
 116
 117 enum piglit_result
 118 piglit_display(void)
 119 {
 120         return PIGLIT_PASS;
 121 }