tests/shaders/glsl-fs-mix-constant.c

   1 /*
   2  * Copyright © 2010 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-mix-constant.c
  29  *
  30  * Tests that mix() produces the expected output in a fragment shader with
  31  * all constant arguments.
  32  */
  33
  34 #include "piglit-util.h"
  35
  36 int piglit_width = 100, piglit_height = 100;
  37 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE | GLUT_ALPHA;
  38
  39 static GLint prog;
  40
  41 enum piglit_result
  42 piglit_display(void)
  43 {
  44         GLboolean pass = GL_TRUE;
  45         static const float gray[] = {0.5, 0.5, 0.5, 0.5};
  46
  47         glClearColor(0.0, 1.0, 0.0, 0.0);
  48         glClear(GL_COLOR_BUFFER_BIT);
  49
  50         piglit_draw_rect(10, 10, 10, 10);
  51
  52         pass &= piglit_probe_pixel_rgba(15, 15, gray);
  53
  54         glutSwapBuffers();
  55
  56         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
  57 }
  58
  59 void
  60 piglit_init(int argc, char **argv)
  61 {
  62         GLint vs, fs;
  63
  64         if (!GLEW_VERSION_2_0) {
  65                 printf("Requires OpenGL 2.0\n");
  66                 piglit_report_result(PIGLIT_SKIP);
  67         }
  68
  69         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  70
  71         vs = piglit_compile_shader(GL_VERTEX_SHADER,
  72                                    "shaders/glsl-mvp.vert");
  73         fs = piglit_compile_shader(GL_FRAGMENT_SHADER,
  74                                    "shaders/glsl-fs-mix-constant.frag");
  75
  76         prog = piglit_link_simple_program(vs, fs);
  77
  78         glUseProgram(prog);
  79 }