tests/spec/ext_framebuffer_multisample/accuracy.cpp

   1 /*
   2  * Copyright © 2012 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 #include "common.h"
  24
  25 /**
  26  * \file accuracy.c
  27  *
  28  * Verify the accuracy of multisample antialiasing.
  29  *
  30  * This test utilizes the functions defined in common.cpp to verfify the
  31  * accuracy of MSAA.
  32  *
  33  * The test also accepts the following flags:
  34  *
  35  * - "small": Causes the MSAA image to be renedered in extremely tiny
  36  *   (16x16) tiles that are then stitched together.  This verifies
  37  *   that MSAA works properly on very small buffers (a critical corner
  38  *   case on i965).
  39  *
  40  * - "depthstencil": Causes the framebuffers to use a combined
  41  *   depth/stencil buffer (as opposed to separate depth and stencil
  42  *   buffers).  On some implementations (e.g. the nVidia proprietary
  43  *   driver for Linux) this is necessary for framebuffer completeness.
  44  *   On others (e.g. i965), this is an important corner case to test.
  45  */
  46
  47 PIGLIT_GL_TEST_CONFIG_BEGIN
  48
  49         config.supports_gl_compat_version = 10;
  50
  51         config.window_width = 512;
  52         config.window_height = 256;
  53         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  54         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  55
  56 PIGLIT_GL_TEST_CONFIG_END
  57
  58 const int pattern_width = 256; const int pattern_height = 256;
  59 const int supersample_factor = 16;
  60 int num_samples, max_samples;
  61 bool small = false, combine_depth_stencil = false;
  62 bool all_samples = false;
  63 GLenum filter_mode = GL_NEAREST;
  64 test_type_enum test_type;
  65 Test *test = NULL;
  66
  67 NORETURN void
  68 print_usage_and_exit(char *prog_name)
  69 {
  70         printf("Usage: %s <sample_arg> <test_type> [options]\n"
  71                "  where <sample_arg> is one of:\n"
  72                "    <num_samples>: test supplied sample count\n"
  73                "    all_samples: test all power of 2 samples\n"
  74                "  where <test_type> is one of:\n"
  75                "    color: test downsampling of color buffer\n"
  76                "    srgb: test downsampling of srgb color buffer\n"
  77                "    stencil_draw: test drawing using MSAA stencil buffer\n"
  78                "    stencil_resolve: test resolve of MSAA stencil buffer\n"
  79                "    depth_draw: test drawing using MSAA depth buffer\n"
  80                "    depth_resolve: test resolve of MSAA depth buffer\n"
  81                "Available options:\n"
  82                "    small: use a very small (16x16) MSAA buffer\n"
  83                "    depthstencil: use a combined depth/stencil buffer\n"
  84                "    linear: use GL_LINEAR filter mode\n",
  85                prog_name);
  86         piglit_report_result(PIGLIT_FAIL);
  87 }
  88
  89 void
  90 piglit_init(int argc, char **argv)
  91 {
  92         int i;
  93
  94         if (argc < 3)
  95                 print_usage_and_exit(argv[0]);
  96         {
  97                 char *endptr = NULL;
  98                 if (streq(argv[1], "all_samples"))
  99                         all_samples = true;
 100                 else {
 101                         num_samples = strtol(argv[1], &endptr, 0);
 102                         if (endptr != argv[1] + strlen(argv[1]))
 103                                 print_usage_and_exit(argv[0]);
 104                 }
 105         }
 106
 107         for (i = 3; i < argc; ++i) {
 108                 if (strcmp(argv[i], "small") == 0) {
 109                         small = true;
 110                 } else if (strcmp(argv[i], "depthstencil") == 0) {
 111                         combine_depth_stencil = true;
 112                 } else if (strcmp(argv[i], "linear") == 0) {
 113                         filter_mode = GL_LINEAR;
 114                 } else {
 115                         print_usage_and_exit(argv[0]);
 116                 }
 117         }
 118
 119         piglit_require_gl_version(21);
 120         piglit_require_extension("GL_ARB_framebuffer_object");
 121         piglit_require_extension("GL_ARB_vertex_array_object");
 122
 123         /* Skip the test if num_samples > GL_MAX_SAMPLES */
 124         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
 125         if (num_samples > max_samples)
 126                 piglit_report_result(PIGLIT_SKIP);
 127
 128         if (strcmp(argv[2], "color") == 0) {
 129                 test_type = TEST_TYPE_COLOR;
 130         } else if (strcmp(argv[2], "srgb") == 0) {
 131                 test_type = TEST_TYPE_SRGB;
 132         } else if (strcmp(argv[2], "stencil_draw") == 0) {
 133                 test_type = TEST_TYPE_STENCIL_DRAW;
 134         } else if (strcmp(argv[2], "stencil_resolve") == 0) {
 135                 test_type = TEST_TYPE_STENCIL_RESOLVE;
 136         } else if (strcmp(argv[2], "depth_draw") == 0) {
 137                 test_type = TEST_TYPE_DEPTH_DRAW;
 138         } else if (strcmp(argv[2], "depth_resolve") == 0) {
 139                 test_type = TEST_TYPE_DEPTH_RESOLVE;
 140         } else {
 141                 print_usage_and_exit(argv[0]);
 142         }
 143 }
 144
 145 bool
 146 test_create_and_execute()
 147 {
 148         test = create_test(test_type, num_samples, small,
 149                            combine_depth_stencil,
 150                            pattern_width, pattern_height, supersample_factor,
 151                            filter_mode);
 152         return test->run();
 153 }
 154
 155 enum piglit_result
 156 piglit_display()
 157 {
 158         bool pass = true, result = pass;
 159
 160         if (!all_samples) {
 161                 pass = test_create_and_execute() && pass;
 162                 pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 163                 piglit_present_results();
 164                 return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 165         }
 166
 167         for (num_samples = 0; num_samples <= max_samples; ) {
 168                 result = test_create_and_execute();
 169                 result = piglit_check_gl_error(GL_NO_ERROR) && result;
 170                 printf("Samples = %d, Result = %s\n\n",
 171                        num_samples, result ? "pass" : "fail");
 172                 pass = result && pass;
 173                 /* Test only power of 2 samples */
 174                 num_samples = num_samples ? num_samples << 1: num_samples + 2;
 175                 piglit_present_results();
 176         }
 177
 178         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 179 }