tests/shaders/glsl-vs-int-attrib.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
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   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 glsl-vs-int-attrib.c
  25  *
  26  * Tests that we can set an integer vertex attribute to a value that
  27  * looks like a signalling NaN if it were interpreted as a float. If
  28  * an implementation passes this through a floating point variable it
  29  * might incorrectly get corrupted to a quiet NaN.
  30  */
  31
  32 #include "piglit-util-gl.h"
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35
  36         config.supports_gl_compat_version = 20;
  37
  38         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  39
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42 /* This value looks like a signalling NaN if it were interpreted as a
  43  * float */
  44 #define TEST_VALUE 0x7f817f81
  45
  46 #define STR(x) #x
  47 #define STRINGIFY(x) STR(x)
  48
  49 static const char
  50 vertex_source[] =
  51         "#version 130\n"
  52         "\n"
  53         "attribute vec4 piglit_vertex;\n"
  54         "attribute uint a_value;\n"
  55         "\n"
  56         "void\n"
  57         "main()\n"
  58         "{\n"
  59         "  if (a_value == " STRINGIFY(TEST_VALUE) "u)\n"
  60         "    gl_FrontColor = vec4(0.0, 1.0, 0.0, 1.0);\n"
  61         "  else\n"
  62         "    gl_FrontColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
  63         "  gl_Position = piglit_vertex;\n"
  64         "}\n";
  65
  66 static const float green[] = { 0.0f, 1.0f, 0.0f };
  67
  68 static bool
  69 run_test(void)
  70 {
  71         GLuint prog;
  72         GLint attrib;
  73         bool pass;
  74
  75         prog = piglit_build_simple_program(vertex_source,
  76                                            NULL /* fs_source */);
  77         glUseProgram(prog);
  78
  79         attrib = glGetAttribLocation(prog, "a_value");
  80         glVertexAttribI1ui(attrib, TEST_VALUE);
  81
  82         piglit_draw_rect(-1, -1, 2, 2);
  83         pass = piglit_probe_pixel_rgb(0, 0, green);
  84
  85         glUseProgram(0);
  86         glDeleteProgram(prog);
  87
  88         return pass;
  89 }
  90
  91 void
  92 piglit_init(int argc, char **argv)
  93 {
  94         bool pass;
  95
  96         /* We need to be able to call glVertexAttribI1ui */
  97         if (piglit_get_gl_version() < 30
  98             && !piglit_is_extension_supported("GL_EXT_gpu_shader4")) {
  99                 printf("OpenGL 3.0 or GL_EXT_gpu_shader4 is required.\n");
 100                 piglit_report_result(PIGLIT_SKIP);
 101         }
 102
 103         piglit_require_GLSL_version(130);
 104
 105         pass = run_test();
 106
 107         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 108 }
 109
 110 enum piglit_result
 111 piglit_display(void)
 112 {
 113         /* unused */
 114         return PIGLIT_FAIL;
 115 }