tests/spec/ext_framebuffer_multisample/samples.c

   1 /*
   2  * Copyright © 2011 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 #include "piglit-util-gl.h"
  25
  26 /**
  27  * @file samples.c
  28  *
  29  * From the EXT_framebuffer_multisample spec:
  30  *
  31  *     "The values of SAMPLE_BUFFERS and SAMPLES are derived from the
  32  *      attachments of the currently bound framebuffer object.  If the
  33  *      current DRAW_FRAMEBUFFER_BINDING_EXT is not "framebuffer
  34  *      complete", then both SAMPLE_BUFFERS and SAMPLES are undefined.
  35  *      Otherwise, SAMPLES is equal to the value of
  36  *      RENDERBUFFER_SAMPLES_EXT for the attached images (which all
  37  *      must have the same value for RENDERBUFFER_SAMPLES_EXT).
  38  *      Further, SAMPLE_BUFFERS is one if SAMPLES is non-zero.
  39  *      Otherwise, SAMPLE_BUFFERS is zero."
  40  *
  41  * See also negative-mismatched-samples.c.
  42  */
  43
  44 PIGLIT_GL_TEST_CONFIG_BEGIN
  45
  46         config.supports_gl_compat_version = 10;
  47
  48         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  49         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  50
  51 PIGLIT_GL_TEST_CONFIG_END
  52
  53 enum piglit_result
  54 piglit_display(void)
  55 {
  56         /* UNREACHED */
  57         return PIGLIT_FAIL;
  58 }
  59
  60 void
  61 piglit_init(int argc, char **argv)
  62 {
  63         GLint max_samples, sample_buffers, samples, rb_samples;
  64         GLuint rb, fb;
  65         GLenum status;
  66         bool pass = true;
  67         int i;
  68
  69         piglit_require_extension("GL_EXT_framebuffer_multisample");
  70
  71         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
  72
  73         glGenFramebuffersEXT(1, &fb);
  74         glBindFramebufferEXT(GL_FRAMEBUFFER, fb);
  75
  76         glDrawBuffer(GL_COLOR_ATTACHMENT0);
  77         glReadBuffer(GL_COLOR_ATTACHMENT0);
  78
  79         for (i = 0; i < max_samples; i++) {
  80                 glGenRenderbuffersEXT(1, &rb);
  81                 glBindRenderbufferEXT(GL_RENDERBUFFER, rb);
  82                 glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER,
  83                                                     max_samples,
  84                                                     GL_RGBA, 1, 1);
  85
  86                 glFramebufferRenderbufferEXT(GL_FRAMEBUFFER,
  87                                              GL_COLOR_ATTACHMENT0,
  88                                              GL_RENDERBUFFER, rb);
  89
  90                 status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
  91                 if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  92                         fprintf(stderr, "FBO incomplete\n");
  93                         piglit_report_result(PIGLIT_FAIL);
  94                 }
  95
  96                 glGetRenderbufferParameterivEXT(GL_RENDERBUFFER,
  97                                                 GL_RENDERBUFFER_SAMPLES,
  98                                                 &rb_samples);
  99
 100                 glGetIntegerv(GL_SAMPLES, &samples);
 101                 if (rb_samples != samples) {
 102                         fprintf(stderr,
 103                                 "FBO reported GL_SAMPLES %d for "
 104                                 "rb samples %d\n",
 105                                 samples, rb_samples);
 106                         pass = false;
 107                 }
 108
 109                 glGetIntegerv(GL_SAMPLE_BUFFERS, &sample_buffers);
 110                 if ((rb_samples != 0) != (sample_buffers == 1)) {
 111                         fprintf(stderr,
 112                                 "FBO reported GL_SAMPLE_BUFFERS %d for "
 113                                 "rb samples %d\n",
 114                                 sample_buffers, samples);
 115                         pass = false;
 116                 }
 117
 118                 glDeleteRenderbuffersEXT(1, &rb);
 119         }
 120
 121         glDeleteFramebuffersEXT(1, &fb);
 122
 123         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 124 }