tests/spec/ext_framebuffer_multisample/blit-multiple-render-targets.cpp

   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"),
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   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 /** \file blit-multiple-render-targets.cpp
  25  *
  26  *  This test verifies that glBlitFramebuffer() works as expected in case of
  27  *  multiple render targets.
  28  *
  29  *  From Section 4.3.2, page 268 of OpenGL 4.0 spec:
  30  *
  31  *     "When the color buffer is transferred, values are taken from the read
  32  *      buffer of the read framebuffer and written to each of the draw buffers
  33  *      of the draw framebuffer."
  34  **/
  35
  36 #include "piglit-fbo.h"
  37 using namespace piglit_util_fbo;
  38
  39 PIGLIT_GL_TEST_CONFIG_BEGIN
  40
  41         config.supports_gl_compat_version = 10;
  42         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  43         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 static Fbo multisample_fbo;
  48
  49 void
  50 print_usage_and_exit(char *prog_name)
  51 {
  52         printf("Usage: %s <num_samples>\n", prog_name);
  53         piglit_report_result(PIGLIT_FAIL);
  54 }
  55
  56
  57 extern "C" void
  58 piglit_init(int argc, char **argv)
  59 {
  60         if (argc != 2)
  61                 print_usage_and_exit(argv[0]);
  62
  63         /* 1st arg: num_samples */
  64         char *endptr = NULL;
  65         int num_samples = strtol(argv[1], &endptr, 0);
  66         if (endptr != argv[1] + strlen(argv[1]))
  67                 print_usage_and_exit(argv[0]);
  68
  69         piglit_require_extension("GL_ARB_framebuffer_object");
  70
  71         /* Skip the test if num_samples > GL_MAX_SAMPLES */
  72         GLint max_samples;
  73         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
  74         if (num_samples > max_samples)
  75                 piglit_report_result(PIGLIT_SKIP);
  76
  77         FboConfig Config(num_samples, piglit_width, piglit_height);
  78
  79         /* Setup fbo with renderbuffer and texture attachments */
  80         Config.num_rb_attachments = 2;
  81         Config.rb_attachment[0] = GL_COLOR_ATTACHMENT0;
  82         Config.rb_attachment[1] = GL_COLOR_ATTACHMENT1;
  83
  84         Config.num_tex_attachments = 4;
  85         for (int i = 0; i < Config.num_tex_attachments; i++)
  86                 Config.tex_attachment[i] = GL_COLOR_ATTACHMENT2 + i;
  87
  88         multisample_fbo.setup(Config);
  89
  90         if (!piglit_check_gl_error(GL_NO_ERROR)) {
  91                 piglit_report_result(PIGLIT_FAIL);
  92         }
  93 }
  94
  95 extern "C" enum piglit_result
  96 piglit_display()
  97 {
  98         bool pass = true;
  99         const GLenum bufs[] =
 100                 {GL_COLOR_ATTACHMENT1,
 101                  GL_COLOR_ATTACHMENT4,
 102                  GL_COLOR_ATTACHMENT5,
 103
 104                  GL_COLOR_ATTACHMENT0,
 105                  GL_COLOR_ATTACHMENT2,
 106                  GL_COLOR_ATTACHMENT3};
 107
 108         const float expected[][4] =
 109                 {{0.0, 1.0, 0.0, 1.0}, /* GL_COLOR_ATTACHMENT1 */
 110                  {0.0, 1.0, 0.0, 1.0}, /* GL_COLOR_ATTACHMENT4 */
 111                  {0.0, 1.0, 0.0, 1.0}, /* GL_COLOR_ATTACHMENT5 */
 112
 113                  {0.0, 0.0, 1.0, 1.0}, /* GL_COLOR_ATTACHMENT0 */
 114                  {0.0, 0.0, 1.0, 1.0}, /* GL_COLOR_ATTACHMENT2 */
 115                  {0.0, 0.0, 1.0, 1.0}};/* GL_COLOR_ATTACHMENT3 */
 116
 117         /* Clear piglit_winsys_fbo to green color */
 118         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 119         glClearColor(0.0, 1.0, 0.0, 1.0);
 120         glClear(GL_COLOR_BUFFER_BIT);
 121
 122         /* Clear all color attachements of multisample_fbo to blue color */
 123         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisample_fbo.handle);
 124         glDrawBuffers(6, bufs);
 125         glClearColor(0.0, 0.0, 1.0, 1.0);
 126         glClear(GL_COLOR_BUFFER_BIT);
 127
 128         /* Set the draw buffers for BlitFramebuffer */
 129         glDrawBuffers(3, bufs);
 130
 131         /* Blit from piglit_winsys_fbo to multisample_fbo. Blitting should
 132          * happen in to all the draw buffers set above.
 133          */
 134         glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
 135         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisample_fbo.handle);
 136         glBlitFramebuffer(0, 0, piglit_width, piglit_height,
 137                           0, 0, piglit_width, piglit_height,
 138                           GL_COLOR_BUFFER_BIT,
 139                           GL_NEAREST);
 140
 141         for (unsigned i = 0; i < ARRAY_SIZE(bufs); i++) {
 142                 bool result =true;
 143
 144                 /* Resolve the contents of multisample_fbo in to
 145                  * piglit_winsys_fbo.
 146                  */
 147                 glBindFramebuffer(GL_READ_FRAMEBUFFER, multisample_fbo.handle);
 148                 glReadBuffer(bufs[i]);
 149                 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
 150                 glClearColor(0.0, 0.0, 0.0, 1.0);
 151                 glClear(GL_COLOR_BUFFER_BIT);
 152
 153                 glBlitFramebuffer(0, 0, piglit_width, piglit_height,
 154                                   0, 0, piglit_width, piglit_height,
 155                                   GL_COLOR_BUFFER_BIT,
 156                                   GL_NEAREST);
 157
 158                 /* Verify the contents */
 159                 glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
 160                 result = piglit_probe_rect_rgba(0, 0, piglit_width,
 161                                               piglit_height, expected[i]);
 162                 pass = result && pass;
 163                 printf("Attachment = GL_COLOR_ATTACHMENT%d, Result = %s\n",
 164                        bufs[i] - GL_COLOR_ATTACHMENT0,
 165                        result ? "pass" :  "fail");
 166                 piglit_present_results();
 167         }
 168
 169         pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
 170         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 171 }