tests/spec/arb_occlusion_query/occlusion_query_meta_save.c

   1 /*
   2  * Copyright © 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
   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  *    Neil Roberts <neil@linux.intel.com>
  25  */
  26
  27 /**
  28  * \file occlusion_query_meta_save.c
  29  *
  30  * Verify that doing a clear (which is potentially implemented as a
  31  * meta operation) doesn't reset the samples-passed count back to
  32  * zero.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB;
  41         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45
  46 static bool
  47 run_test(bool scissor_clear)
  48 {
  49         GLuint query;
  50         GLint result = -1;
  51
  52         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
  53
  54         glClearColor(0.0, 1.0, 0.0, 0.0);
  55         glClear(GL_COLOR_BUFFER_BIT);
  56
  57         glGenQueries(1, &query);
  58
  59         glBeginQuery(GL_SAMPLES_PASSED, query);
  60
  61         /* Render 64 pixels. This should affect the query */
  62         piglit_draw_rect(0, 0, 8, 8);
  63
  64         /* Clear the framebuffer. This shouldn't affect the query */
  65         glClearColor(0.0, 0.0, 1.0, 0.0);
  66         if (scissor_clear) {
  67                 glScissor(0, 0, piglit_width / 2, piglit_height / 2);
  68                 glEnable(GL_SCISSOR_TEST);
  69         }
  70         glClear(GL_COLOR_BUFFER_BIT);
  71         if (scissor_clear) {
  72                 glDisable(GL_SCISSOR_TEST);
  73         }
  74
  75         /* Render another 64 pixels. This should continue adding to
  76          * the query */
  77         piglit_draw_rect(4, 0, 8, 8);
  78
  79         glEndQuery(GL_SAMPLES_PASSED);
  80
  81         glGetQueryObjectiv(query, GL_QUERY_RESULT, &result);
  82
  83         glDeleteQueries(1, &query);
  84
  85         piglit_present_results();
  86
  87         if (result != 128) {
  88                 printf("Failure: \n");
  89                 printf("  Occlusion query resulted in %d samples "
  90                        "(expected 128)\n",
  91                        result);
  92                 printf("  Scissor enabled? %s\n", scissor_clear ? "yes" : "no");
  93                 return false;
  94         } else {
  95                 return true;
  96         }
  97 }
  98
  99 enum piglit_result
 100 piglit_display(void)
 101 {
 102         bool pass = run_test(false);
 103         pass = run_test(true) && pass;
 104
 105         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 106 }
 107
 108 void
 109 piglit_init(int argc, char **argv)
 110 {
 111         GLint query_bits;
 112
 113         piglit_require_extension("GL_ARB_occlusion_query");
 114
 115         /* It is legal for a driver to support the query API but not have
 116          * any query bits.  I wonder how many applications actually check for
 117          * this case...
 118          */
 119         glGetQueryiv(GL_SAMPLES_PASSED, GL_QUERY_COUNTER_BITS, &query_bits);
 120         if (query_bits == 0)
 121                 piglit_report_result(PIGLIT_SKIP);
 122 }