tests/spec/arb_gpu_shader5/compiler/invocations_count_too_large.c

   1 /*
   2  * Copyright (c) 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /** \file
  25  *
  26  * Test that exceeding the implementation's maximum invocations
  27  * value (GL_MAX_GEOMETRY_SHADER_INVOCATIONS) results in a compile
  28  * error.
  29  *
  30  * From the ARB_gpu_shader5 specification:
  31  *
  32  *     If a shader specifies an invocation count greater than
  33  *     the implementation-dependent maximum, it will fail to
  34  *     compile.
  35  *
  36  */
  37
  38 #include "piglit-util-gl.h"
  39
  40 PIGLIT_GL_TEST_CONFIG_BEGIN
  41
  42         config.supports_gl_compat_version = 32;
  43         config.supports_gl_core_version = 32;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47
  48 enum piglit_result
  49 piglit_display(void)
  50 {
  51         /* UNREACHED */
  52         return PIGLIT_FAIL;
  53 }
  54
  55
  56 static const char *gs_template =
  57         "#version 150\n"
  58         "#extension GL_ARB_gpu_shader5: enable\n"
  59         "\n"
  60         "layout(points, invocations = %d) in;\n"
  61         "\n"
  62         "void main()\n"
  63         "{\n"
  64         "}\n";
  65
  66
  67 static bool
  68 test_invocations_size(GLint size, bool expect_ok)
  69 {
  70         char *shader_text;
  71         GLint shader;
  72         GLint ok;
  73
  74         printf("Invocation count of %d should %s: ", size,
  75                expect_ok ? "compile successfully" : "produce a compile error");
  76
  77         (void)!asprintf(&shader_text, gs_template, size);
  78         shader = glCreateShader(GL_GEOMETRY_SHADER);
  79         glShaderSource(shader, 1, (const GLchar **) &shader_text, NULL);
  80         glCompileShader(shader);
  81         glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
  82         if (!piglit_check_gl_error(GL_NO_ERROR)) {
  83                 /* Details of the error have already been printed. */
  84                 printf("GL Error occurred.\n");
  85                 return false;
  86         }
  87         if (ok)
  88                 printf("Successful compile.\n");
  89         else
  90                 printf("Compile error.\n");
  91         return ok == expect_ok;
  92 }
  93
  94
  95 void
  96 piglit_init(int argc, char **argv)
  97 {
  98         GLint max_invocations;
  99         int i;
 100         bool pass = true;
 101
 102         piglit_require_extension("GL_ARB_gpu_shader5");
 103
 104         glGetIntegerv(GL_MAX_GEOMETRY_SHADER_INVOCATIONS,
 105                       &max_invocations);
 106
 107         if (!piglit_check_gl_error(GL_NO_ERROR))
 108                 piglit_report_result(PIGLIT_FAIL);
 109
 110         for (i = 1; i <= max_invocations; i++) {
 111                 /* Test that this size is allowed. */
 112                 pass = test_invocations_size(i, true) && pass;
 113         }
 114
 115         /* Test that a count 1 above the max causes a compilation failure. */
 116         pass = test_invocations_size(max_invocations + 1, false) && pass;
 117
 118         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 119 }