tests/spec/arb_uniform_buffer_object/getactiveuniformsiv-uniform-matrix-stride.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 getactiveuniformsiv-uniform-matrix-stride.c
  25  *
  26  * Tests that (std140 layout) uniform matrix strides are reported
  27  * correctly through the API.
  28  *
  29  * Because std140 lays matrices out like arrays, and array elements
  30  * get rounded up to the size of a vec4, MATRIX_STRIDE is either 16 or
  31  * a non-matrix value.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  40         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static const char fs_source[] =
  45         "#extension GL_ARB_uniform_buffer_object : require\n"
  46         "\n"
  47         "layout(std140) uniform ub {\n"
  48         "       vec4 v4;\n"
  49         "       mat4 m4;\n"
  50         "       mat3 m3;\n"
  51         "       mat2 m2;\n"
  52         "       mat4 m4a[2];\n"
  53         "};\n"
  54         "uniform vec4 default_v4;\n"
  55         "uniform mat4 default_m4;\n"
  56         "\n"
  57         "void main()\n"
  58         "{\n"
  59         "       gl_FragColor = v4 + default_v4 + default_m4[0] + m4[0] + vec4(m3[0], 0.) + vec4(m2[0], 0., 0.) + m4a[0][0];\n"
  60         "}\n";
  61
  62 void
  63 piglit_init(int argc, char **argv)
  64 {
  65         bool pass = true;
  66         GLuint prog;
  67         const char *uniform_names[] = {
  68                 "v4",
  69                 "m4",
  70                 "m3",
  71                 "m2",
  72                 "m4a[0]",
  73                 "default_v4",
  74                 "default_m4",
  75         };
  76         int expected_strides[] = {
  77                 0,
  78                 16,
  79                 16,
  80                 16,
  81                 16,
  82                 -1,
  83                 -1,
  84         };
  85         GLint strides[ARRAY_SIZE(uniform_names)];
  86         GLuint uniform_indices[ARRAY_SIZE(uniform_names)];
  87         int i;
  88
  89         piglit_require_extension("GL_ARB_uniform_buffer_object");
  90
  91         prog = piglit_build_simple_program(NULL, fs_source);
  92
  93         glGetUniformIndices(prog, ARRAY_SIZE(uniform_names), uniform_names,
  94                             uniform_indices);
  95         glGetActiveUniformsiv(prog, ARRAY_SIZE(uniform_names), uniform_indices,
  96                               GL_UNIFORM_MATRIX_STRIDE, strides);
  97         for (i = 0; i < ARRAY_SIZE(uniform_names); i++) {
  98                 printf("Uniform \"%s\": stride %d, expected %d",
  99                        uniform_names[i],
 100                        strides[i],
 101                        expected_strides[i]);
 102
 103                 if (strides[i] != expected_strides[i]) {
 104                         printf(" FAIL");
 105                         pass = false;
 106                 }
 107
 108                 printf("\n");
 109         }
 110
 111         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 112 }
 113
 114 enum piglit_result piglit_display(void)
 115 {
 116         /* UNREACHED */
 117         return PIGLIT_FAIL;
 118 }