tests/spec/arb_uniform_buffer_object/uniformblockbinding.c

   1 /*
   2  * Copyright © 2012 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 /** @file uniformblockbinding.c
  25  *
  26  * From the GL_ARB_uniform_buffer_object spec:
  27  *
  28  *     "Each of a program's active uniform blocks has a corresponding
  29  *      uniform buffer object binding point. This binding point can be
  30  *      assigned by calling:
  31  *
  32  *          void UniformBlockBinding(uint program,
  33  *                                   uint uniformBlockIndex,
  34  *                                   uint uniformBlockBinding);
  35  *
  36  *      <program> is a name of a program object for which the command
  37  *      LinkProgram has been issued in the past.
  38  *
  39  *      <uniformBlockIndex> must be an active uniform block index of
  40  *      the program <program>. Otherwise, INVALID_VALUE is generated.
  41  *
  42  *      <uniformBlockBinding> must be less than MAX_UNIFORM_BUFFER_BINDINGS.
  43  *      Otherwise, INVALID_VALUE is generated.
  44  *
  45  *      ...
  46  *
  47  *      When a program object is linked or re-linked, the uniform
  48  *      buffer object binding point assigned to each of its active
  49  *      uniform blocks is reset to zero.
  50
  51  *      ...
  52  *
  53  *      The error INVALID_VALUE is generated by GetActiveUniformsiv,
  54  *      GetActiveUniformName, GetActiveUniformBlockiv,
  55  *      GetActiveUniformBlockName, and UniformBlockBinding if
  56  *      <program> is not a value generated by GL."
  57  */
  58
  59 #include "piglit-util-gl.h"
  60
  61 PIGLIT_GL_TEST_CONFIG_BEGIN
  62
  63         config.supports_gl_compat_version = 10;
  64
  65         config.window_width = 10;
  66         config.window_height = 10;
  67         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  68         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  69
  70 PIGLIT_GL_TEST_CONFIG_END
  71
  72 void
  73 piglit_init(int argc, char **argv)
  74 {
  75         int i;
  76         GLuint prog;
  77         const char *source =
  78                 "#extension GL_ARB_uniform_buffer_object : enable\n"
  79                 "uniform a { float u1; };\n"
  80                 "uniform b { float u2; };\n"
  81                 "void main() {\n"
  82                 "       gl_FragColor = vec4(u1 + u2);\n"
  83                 "}\n";
  84         int blocks;
  85         int binding, max_bindings;
  86         bool pass = true;
  87
  88         piglit_require_extension("GL_ARB_uniform_buffer_object");
  89
  90         prog = piglit_build_simple_program(NULL, source);
  91
  92         glGetProgramiv(prog, GL_ACTIVE_UNIFORM_BLOCKS, &blocks);
  93         assert(blocks == 2);
  94
  95         for (i = 0; i < blocks; i++) {
  96                 glGetActiveUniformBlockiv(prog, i, GL_UNIFORM_BLOCK_BINDING,
  97                                           &binding);
  98
  99                 if (binding != 0) {
 100                         fprintf(stderr,
 101                                 "Linked program should have binding[%d] = %d, "
 102                                 "saw %d\n",
 103                                 i, 0, binding);
 104                         pass = false;
 105                 }
 106         }
 107
 108         for (i = 0; i < blocks; i++) {
 109                 glUniformBlockBinding(prog, i, blocks - i);
 110         }
 111
 112         for (i = 0; i < blocks; i++) {
 113                 glGetActiveUniformBlockiv(prog, i, GL_UNIFORM_BLOCK_BINDING,
 114                                           &binding);
 115
 116                 if (binding != blocks - i) {
 117                         fprintf(stderr,
 118                                 "Updated binding[%d] to %d, but got %d\n",
 119                                 i, blocks - i, binding);
 120                         pass = false;
 121                 }
 122         }
 123
 124         glLinkProgram(prog);
 125
 126         for (i = 0; i < blocks; i++) {
 127                 glGetActiveUniformBlockiv(prog, i, GL_UNIFORM_BLOCK_BINDING,
 128                                           &binding);
 129
 130                 if (binding != 0) {
 131                         fprintf(stderr,
 132                                 "Relinked program should have binding[%d] = %d, "
 133                                 "saw %d\n",
 134                                 i, 0, binding);
 135                         pass = false;
 136                 }
 137         }
 138
 139         if (!piglit_khr_no_error) {
 140                 glUniformBlockBinding(prog, blocks, 0);
 141                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 142
 143                 glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &max_bindings);
 144                 glUniformBlockBinding(prog, 0, max_bindings);
 145                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 146
 147                 glUniformBlockBinding(0xd0d0, 0, 0);
 148                 pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
 149         }
 150
 151         glDeleteProgram(prog);
 152
 153         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 154 }
 155
 156 enum piglit_result piglit_display(void)
 157 {
 158         /* UNREACHED */
 159         return PIGLIT_FAIL;
 160 }
 161