tests/shaders/useshaderprogram-flushverts-1.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 useshaderprogram-flushverts-1.c
  29  *
  30  * Tests that a change in the shader program results in previous
  31  * vertices getting flushed correctly with the previous shader.
  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_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static GLint vs_prog, fs_prog_1, fs_prog_2;
  45
  46 enum piglit_result
  47 piglit_display(void)
  48 {
  49         GLboolean pass = GL_TRUE;
  50         float green[4] = {0.0, 1.0, 0.0, 0.0};
  51         float blue[4] = {0.0, 0.0, 1.0, 0.0};
  52
  53         glUseShaderProgramEXT(GL_VERTEX_SHADER, vs_prog);
  54
  55         glUseShaderProgramEXT(GL_FRAGMENT_SHADER, fs_prog_1);
  56         glBegin(GL_TRIANGLE_FAN);
  57         glVertex2f(-1.0, -1.0);
  58         glVertex2f(-0.5, -1.0);
  59         glVertex2f(-0.5,  1.0);
  60         glVertex2f(-1.0,  1.0);
  61         glEnd();
  62
  63         glUseShaderProgramEXT(GL_FRAGMENT_SHADER, fs_prog_2);
  64         glBegin(GL_TRIANGLE_FAN);
  65         glVertex2f(-0.5, -1.0);
  66         glVertex2f( 0.0, -1.0);
  67         glVertex2f( 0.0,  1.0);
  68         glVertex2f(-0.5,  1.0);
  69         glEnd();
  70
  71         glUseShaderProgramEXT(GL_FRAGMENT_SHADER, fs_prog_1);
  72         glBegin(GL_TRIANGLE_FAN);
  73         glVertex2f(0.0, -1.0);
  74         glVertex2f(0.5, -1.0);
  75         glVertex2f(0.5,  1.0);
  76         glVertex2f(0.0,  1.0);
  77         glEnd();
  78
  79         glUseShaderProgramEXT(GL_FRAGMENT_SHADER, fs_prog_2);
  80         glBegin(GL_TRIANGLE_FAN);
  81         glVertex2f(0.5, -1.0);
  82         glVertex2f(1.0, -1.0);
  83         glVertex2f(1.0,  1.0);
  84         glVertex2f(0.5,  1.0);
  85         glEnd();
  86
  87         pass &= piglit_probe_pixel_rgba(piglit_width * 1 / 8, piglit_height / 2,
  88                                         green);
  89         pass &= piglit_probe_pixel_rgba(piglit_width * 3 / 8, piglit_height / 2,
  90                                         blue);
  91         pass &= piglit_probe_pixel_rgba(piglit_width * 5 / 8, piglit_height / 2,
  92                                         green);
  93         pass &= piglit_probe_pixel_rgba(piglit_width * 7 / 8, piglit_height / 2,
  94                                         blue);
  95
  96         piglit_present_results();
  97
  98         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  99 }
 100
 101 void
 102 piglit_init(int argc, char **argv)
 103 {
 104         GLint vs, fs1, fs2;
 105         const char *vs_source =
 106                 "void main()\n"
 107                 "{\n"
 108                 "       gl_Position = gl_Vertex;\n"
 109                 "}\n";
 110         const char *fs1_source =
 111                 "void main()\n"
 112                 "{\n"
 113                 "       gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);\n"
 114                 "}\n";
 115         const char *fs2_source =
 116                 "void main()\n"
 117                 "{\n"
 118                 "       gl_FragColor = vec4(0.0, 0.0, 1.0, 0.0);\n"
 119                 "}\n";
 120
 121         piglit_require_gl_version(20);
 122         piglit_require_extension("GL_EXT_separate_shader_objects");
 123
 124         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_source);
 125         fs1 = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs1_source);
 126         fs2 = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs2_source);
 127         vs_prog = piglit_link_simple_program(vs, 0);
 128         fs_prog_1 = piglit_link_simple_program(0, fs1);
 129         fs_prog_2 = piglit_link_simple_program(0, fs2);
 130 }