tests/spec/gl-3.2/clear-no-buffers.c

   1 /**
   2  * Copyright © 2013 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
  24 /**
  25  * Test that Clear() clears no buffers when passed 0
  26  *
  27  * Section 4.2.3(Clearing the Buffers) of OpenGL 3.2 Core says:
  28  * "The value to which each buffer is cleared depends on the setting of the
  29  *  clear value for that buffer. If buf is zero, no buffers are cleared."
  30  *
  31  */
  32
  33 #include "piglit-util-gl.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_compat_version = 32;
  38         config.supports_gl_core_version = 32;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB |
  41                                 PIGLIT_GL_VISUAL_DOUBLE |
  42                                 PIGLIT_GL_VISUAL_DEPTH |
  43                                 PIGLIT_GL_VISUAL_STENCIL;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 void
  49 piglit_init(int argc, char **argv)
  50 {
  51 }
  52
  53 enum piglit_result
  54 piglit_display(void)
  55 {
  56         bool pass = true;
  57         float green[] = {0, 1, 0};
  58
  59         glEnable(GL_DEPTH_TEST);
  60
  61         /* Set first base values to the buffers */
  62         glClearColor(0.0, 1.0, 0.0, 1.0);
  63         glClearDepth(.8);
  64         glClearStencil(1);
  65         glClear(GL_COLOR_BUFFER_BIT |
  66                 GL_DEPTH_BUFFER_BIT |
  67                 GL_STENCIL_BUFFER_BIT);
  68
  69         /* Set a second value to the buffers */
  70         glClearColor(1.0, 0.0, 0.0, 1.0);
  71         glClearDepth(.2);
  72         glClearStencil(2);
  73
  74         glClear(0);
  75         pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
  76
  77         /* if probe returns the first value, glClear(0) didn't clear values */
  78         pass = piglit_probe_rect_rgb(0, 0, piglit_width, piglit_height, green)
  79                  && pass;
  80         pass = piglit_probe_rect_depth(0, 0, piglit_width, piglit_height, .8)
  81                  && pass;
  82         pass = piglit_probe_rect_stencil(0, 0, piglit_width, piglit_height, 1)
  83                  && pass;
  84
  85         piglit_present_results();
  86
  87         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  88 }