tests/spec/arb_explicit_uniform_location/array-elements.c

   1 /*
   2  * Copyright © 2014 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 /**
  25  * \file array-elements.c
  26  *
  27  * Tests that array elements get sequential locations.
  28  *
  29  * The GL_ARB_explicit_uniform_location spec says:
  30  *     "Individual elements of a uniform array are assigned consecutive
  31  *     locations with the first element taking location <location>."
  32  */
  33 #include "piglit-util-gl.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_compat_version = 30;
  38         config.window_visual = PIGLIT_GL_VISUAL_RGB;
  39         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 enum piglit_result
  44 piglit_display(void)
  45 {
  46         return PIGLIT_FAIL;
  47 }
  48
  49 static const char vs_text[] =
  50         "vec4 vertex;\n"
  51         "void main() {\n"
  52                 "gl_Position = vertex;\n"
  53         "}";
  54
  55 static const char fs_text[] =
  56         "#version 130\n"
  57         "#extension GL_ARB_explicit_attrib_location: require\n"
  58         "#extension GL_ARB_explicit_uniform_location: require\n"
  59         "#define ARRAY_SIZE 16\n"
  60         "layout(location = 1) uniform float r;\n"
  61         "layout(location = 2) uniform float g;\n"
  62         "layout(location = 3) uniform float a[ARRAY_SIZE];\n"
  63         "layout(location = 19) uniform float b;\n"
  64         "void main() {\n"
  65                 "gl_FragColor = vec4(r, g, b, a[ARRAY_SIZE - 1]);\n"
  66         "}";
  67
  68 void
  69 piglit_init(int argc, char **argv)
  70 {
  71         GLuint prog, i;
  72
  73         piglit_require_extension("GL_ARB_explicit_attrib_location");
  74         piglit_require_extension("GL_ARB_explicit_uniform_location");
  75
  76         prog = piglit_build_simple_program(vs_text, fs_text);
  77
  78         /* verify that locations are sequential */
  79         for (i = 0; i < 16; i++) {
  80                 char *element;
  81                 if (asprintf(&element, "a[%d]", i) == -1)
  82                         piglit_report_result(PIGLIT_FAIL);
  83
  84                 if (glGetUniformLocation(prog, element) != 3 + i)
  85                         piglit_report_result(PIGLIT_FAIL);
  86
  87                 free(element);
  88         }
  89
  90         glDeleteProgram(prog);
  91         piglit_report_result(PIGLIT_PASS);
  92 }