tests/spec/ext_framebuffer_multisample/multisample-blit.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 "piglit-test-pattern.h"
  24 #include "piglit-fbo.h"
  25 using namespace piglit_util_fbo;
  26 using namespace piglit_util_test_pattern;
  27
  28 /**
  29  * \file multisample-blit.cpp
  30  *
  31  * Verify the accuracy of blitting from an MSAA buffer to another MSAA
  32  * buffer.
  33  *
  34  * This test operates by drawing a test image in an MSAA buffer,
  35  * blitting it to a second MSAA buffer, and then blitting it to the
  36  * window system framebuffer (which is non-MSAA).
  37  *
  38  * To verify that the MSAA-to-MSAA blit worked properly, we also do a
  39  * blit straight from the MSAA buffer to the window system
  40  * framebuffer--this should produce the same image.
  41  */
  42 PIGLIT_GL_TEST_CONFIG_BEGIN
  43
  44         config.supports_gl_compat_version = 10;
  45
  46         config.window_width = 512;
  47         config.window_height = 256;
  48         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DEPTH | PIGLIT_GL_VISUAL_STENCIL;
  49         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  50
  51 PIGLIT_GL_TEST_CONFIG_END
  52
  53 const int pattern_width = 256; const int pattern_height = 256;
  54
  55 Fbo src_fbo;
  56 Fbo dst_fbo;
  57 TestPattern *test_pattern = NULL;
  58 ManifestProgram *manifest_program = NULL;
  59 GLbitfield buffer_to_test;
  60 GLenum filter_mode = GL_NEAREST;
  61
  62 void
  63 print_usage_and_exit(char *prog_name)
  64 {
  65         printf("Usage: %s <num_samples> <buffer_type>\n"
  66                "  where <buffer_type> is one of:\n"
  67                "    color\n"
  68                "    stencil\n"
  69                "    depth\n"
  70                "Available options:\n"
  71                "    linear: use GL_LINEAR filter mode\n",
  72                prog_name);
  73         piglit_report_result(PIGLIT_FAIL);
  74 }
  75
  76 void
  77 piglit_init(int argc, char **argv)
  78 {
  79         int num_samples;
  80         if (argc < 3)
  81                 print_usage_and_exit(argv[0]);
  82         {
  83                 char *endptr = NULL;
  84                 num_samples = strtol(argv[1], &endptr, 0);
  85                 if (endptr != argv[1] + strlen(argv[1]))
  86                         print_usage_and_exit(argv[0]);
  87         }
  88
  89         piglit_require_gl_version(21);
  90         piglit_require_extension("GL_ARB_framebuffer_object");
  91         piglit_require_extension("GL_ARB_vertex_array_object");
  92
  93         /* Skip the test if num_samples > GL_MAX_SAMPLES */
  94         GLint max_samples;
  95         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
  96         if (num_samples > max_samples)
  97                 piglit_report_result(PIGLIT_SKIP);
  98
  99         if (strcmp(argv[2], "color") == 0) {
 100                 test_pattern = new Triangles();
 101                 buffer_to_test = GL_COLOR_BUFFER_BIT;
 102         } else if (strcmp(argv[2], "depth") == 0) {
 103                 test_pattern = new DepthSunburst();
 104                 manifest_program = new ManifestDepth();
 105                 buffer_to_test = GL_DEPTH_BUFFER_BIT;
 106         } else if (strcmp(argv[2], "stencil") == 0) {
 107                 test_pattern = new StencilSunburst();
 108                 manifest_program = new ManifestStencil();
 109                 buffer_to_test = GL_STENCIL_BUFFER_BIT;
 110         } else {
 111                 print_usage_and_exit(argv[0]);
 112         }
 113
 114         for (int i = 3; i < argc; i++) {
 115                 if (strcmp(argv[i], "linear") == 0)
 116                         filter_mode = GL_LINEAR;
 117                 else
 118                         print_usage_and_exit(argv[0]);
 119         }
 120
 121         test_pattern->compile();
 122         if (manifest_program)
 123                 manifest_program->compile();
 124
 125         src_fbo.setup(FboConfig(num_samples, pattern_width, pattern_height));
 126         dst_fbo.setup(FboConfig(num_samples, pattern_width, pattern_height));
 127 }
 128
 129 enum piglit_result
 130 piglit_display()
 131 {
 132         bool pass = true;
 133
 134         /* Draw the test pattern in src_fbo. */
 135         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, src_fbo.handle);
 136         src_fbo.set_viewport();
 137         test_pattern->draw(TestPattern::no_projection);
 138
 139         /* Blit from src_fbo to dst_fbo. */
 140         glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo.handle);
 141         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst_fbo.handle);
 142         glBlitFramebuffer(0, 0, pattern_width, pattern_height,
 143                           0, 0, pattern_width, pattern_height,
 144                           buffer_to_test, filter_mode);
 145
 146         /* If necessary, manifest the depth/stencil image in dst_fbo
 147          * into a color image.  This ensures that the blit that
 148          * follows will depend on all samples of each pixel.
 149          */
 150         dst_fbo.set_viewport();
 151         if (manifest_program)
 152                 manifest_program->run();
 153
 154         /* Blit from dst_fbo to the left half of the window system
 155          * framebuffer.  This is the test image.
 156          */
 157         glBindFramebuffer(GL_READ_FRAMEBUFFER, dst_fbo.handle);
 158         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 159         glBlitFramebuffer(0, 0, pattern_width, pattern_height,
 160                           0, 0, pattern_width, pattern_height,
 161                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
 162
 163         /* Now manifest the image in src_fbo and blit it directly to
 164          * the window system framebuffer.  This is the reference
 165          * image.
 166          */
 167         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, src_fbo.handle);
 168         src_fbo.set_viewport();
 169         if (manifest_program)
 170                 manifest_program->run();
 171         glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo.handle);
 172         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 173         glBlitFramebuffer(0, 0, pattern_width, pattern_height,
 174                           pattern_width, 0, 2*pattern_width, pattern_height,
 175                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
 176
 177         /* Check that the left and right halves of the screen match.
 178          * If they don't, then there must have been a problem blitting
 179          * from src_fbo to dst_fbo.
 180          */
 181         glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
 182         pass = piglit_probe_rect_halves_equal_rgba(0, 0, piglit_width,
 183                                                    piglit_height) && pass;
 184
 185         pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 186
 187         piglit_present_results();
 188
 189         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 190 }