tests/spec/ext_framebuffer_multisample/blit-mismatched-samples.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"),
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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
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  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * @file blit-mismatched-samples.cpp
  26  *
  27  * This test verifies if glBlitFramebuffer() throws GL_INVALID_OPERATION with
  28  * non-matching samples in multisample framebuffer objects.
  29  *
  30  * We initialize two FBOs with different sample counts, do blitting operation
  31  * and then query the gl error.
  32  *
  33  * Author: Anuj Phogat <anuj.phogat@gmail.com>
  34  */
  35
  36 #include "piglit-test-pattern.h"
  37 #include "piglit-fbo.h"
  38 using namespace piglit_util_fbo;
  39 using namespace piglit_util_test_pattern;
  40
  41 PIGLIT_GL_TEST_CONFIG_BEGIN
  42
  43         config.supports_gl_compat_version = 10;
  44
  45         config.window_width = 256;
  46         config.window_height = 256;
  47         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
  48         config.khr_no_error_support = PIGLIT_HAS_ERRORS;
  49
  50 PIGLIT_GL_TEST_CONFIG_END
  51
  52 const int pattern_width = 256; const int pattern_height = 256;
  53 Fbo src_fbo, dst_fbo;
  54
  55 enum piglit_result
  56 piglit_display()
  57 {
  58         bool pass = true;
  59
  60         /* Blit multisample-to-multisample with non-matching sample count */
  61         glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo.handle);
  62         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst_fbo.handle);
  63         glBlitFramebuffer(0, 0, pattern_width, pattern_height,
  64                           0, 0, pattern_width, pattern_height,
  65                           GL_COLOR_BUFFER_BIT, GL_NEAREST);
  66
  67         /* Here GL_INVALID_OPERATION is an expected gl error */
  68         pass = piglit_check_gl_error(GL_INVALID_OPERATION) && pass;
  69
  70         return (pass ? PIGLIT_PASS : PIGLIT_FAIL);
  71 }
  72
  73 void
  74 piglit_init(int argc, char **argv)
  75 {
  76         GLint samples, max_samples;
  77
  78         piglit_require_gl_version(21);
  79         piglit_require_extension("GL_ARB_framebuffer_object");
  80         piglit_require_extension("GL_ARB_vertex_array_object");
  81
  82         /* OpenGL driver is supposed to round up the specified sample count to
  83          * the next available sample count. So, this will create the FBO with
  84          * minimum supported sample count.
  85          */
  86         src_fbo.setup(FboConfig(1 /* sample count */,
  87                                 pattern_width,
  88                                 pattern_height));
  89
  90         glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
  91
  92         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, src_fbo.handle);
  93         glGetIntegerv(GL_SAMPLES, &samples);
  94
  95         /* Skip the test if samples = GL_MAX_SAMPLES */
  96         if (samples == max_samples) {
  97                 printf("OpenGL driver seems to support only one possible"
  98                        " sample count\n");
  99                 piglit_report_result(PIGLIT_SKIP);
 100         }
 101
 102         /* Creating FBO with (samples + 1) ensures that we get a different
 103          * value of sample count in dst_fbo.
 104          */
 105         dst_fbo.setup(FboConfig(samples + 1, pattern_width, pattern_height));
 106
 107         if (!piglit_check_gl_error(GL_NO_ERROR)) {
 108                 printf("Error setting up frame buffer objects\n");
 109                 piglit_report_result(PIGLIT_FAIL);
 110         }
 111 }