tests/shaders/glsl-fs-sqrt-branch.c

   1 /*
   2  * Copyright © 2009 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  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /** @file glsl-fs-sqrt.c
  29  *
  30  * Tests that sqrt produces the expected output in a fragment shader
  31  * containing a conditional branch.  Catches a bug in the 965 driver.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static int args1_location, args2_location;
  45 static GLint prog;
  46
  47 enum piglit_result
  48 piglit_display(void)
  49 {
  50         GLboolean pass = GL_TRUE;
  51         static const float args1[4] = {1.0, 0.25, 0.0, -1.0};
  52         static const float args2[4] = {1.0, 0.0, 0.0, 0.0};
  53         static const float result[] = {1.0, 0.5, 0.0, 0.0};
  54
  55         glClearColor(0.5, 0.5, 0.5, 0.5);
  56         glClear(GL_COLOR_BUFFER_BIT);
  57
  58         glUniform4fv(args1_location, 1, args1);
  59         glUniform4fv(args2_location, 1, args2);
  60         piglit_draw_rect(10, 10, 10, 10);
  61
  62         pass &= piglit_probe_pixel_rgb(15, 15, result);
  63
  64         piglit_present_results();
  65
  66         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  67 }
  68
  69 void
  70 piglit_init(int argc, char **argv)
  71 {
  72         GLint vs, fs;
  73
  74         piglit_require_gl_version(20);
  75
  76         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  77
  78         vs = piglit_compile_shader(GL_VERTEX_SHADER,
  79                                    "shaders/glsl-mvp.vert");
  80         fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
  81                                    "shaders/glsl-fs-sqrt-branch.frag");
  82
  83         prog = piglit_link_simple_program(vs, fs);
  84
  85         glUseProgram(prog);
  86
  87         args1_location = glGetUniformLocation(prog, "args1");
  88         args2_location = glGetUniformLocation(prog, "args2");
  89 }