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/*
* Copyright © 2013 Chris Forbes
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 30;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
/* test execution of sample masking.
* - set mask to half the samples
* - render a red thing
* - set mask to the other half of the samples
* - render a green thing
*
* - blit from the MSAA buffer to the single-sampled FBO
* - blit from the single-sampled FBO to the winsys buffer
* - ensure that the pixels are yellow
*
* note the intermediate single-sampled FBO is only necessary so that
* the resolve is always happening FBO->FBO; if we resolve into a winsys
* buffer, there are sRGB interactions.
*/
GLuint fbo, ss_fbo, tex, ss_rb;
enum piglit_result
piglit_display(void)
{
float half_yellow[] = { 0.5f, 0.5f, 0.0f, 1.0f };
bool pass = true;
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glClearColor(0.2, 0.2, 0.2, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_SAMPLE_MASK);
glSampleMaski(0, 0x3); /* first and second samples */
glColor4f(1.0, 0.0, 0.0, 1.0);
piglit_draw_rect(-1,-1,2,2);
glSampleMaski(0, 0xc); /* third and fourth samples */
glColor4f(0.0, 1.0, 0.0, 1.0);
piglit_draw_rect(-1,-1,2,2);
glDisable(GL_SAMPLE_MASK);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
/* resolve */
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ss_fbo);
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
glBlitFramebuffer(0, 0, 64, 64, 0, 0, 64, 64,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
/* single-sampled blit */
glBindFramebuffer(GL_FRAMEBUFFER, piglit_winsys_fbo);
glBindFramebuffer(GL_READ_FRAMEBUFFER, ss_fbo);
glBlitFramebuffer(0, 0, 64, 64, 0, 0, 64, 64,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
/* the resolve done by the blit should
* blend the red and green samples together */
pass = piglit_probe_pixel_rgba(32, 32, half_yellow) && pass;
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
bool use_multisample_texture = false;
GLint max_samples;
piglit_require_extension("GL_ARB_texture_multisample");
glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
if (max_samples < 4) {
/* We need 4x msaa for this test. Note that GL requires support
* for at least 4x msaa when msaa is supported.
*/
printf("GL_MAX_SAMPLES = %d, need 4\n", max_samples);
piglit_report_result(PIGLIT_SKIP);
}
while (++argv,--argc) {
if (!strcmp(*argv, "-tex"))
use_multisample_texture = true;
}
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
if (use_multisample_texture) {
/* use a multisample texture */
printf("Using GL_TEXTURE_2D_MULTISAMPLE\n");
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE,
4, GL_RGBA, 64, 64, GL_TRUE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D_MULTISAMPLE, tex, 0);
}
else {
/* use a classic renderbuffer */
printf("Using classic MSAA renderbuffer\n");
glGenRenderbuffers(1, &tex);
glBindRenderbuffer(GL_RENDERBUFFER, tex);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4, GL_RGBA, 64, 64);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, tex);
}
glGenFramebuffers(1, &ss_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, ss_fbo);
glGenRenderbuffers(1, &ss_rb);
glBindRenderbuffer(GL_RENDERBUFFER, ss_rb);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, 64, 64);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, ss_rb);
}
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