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/*
* Copyright © 2013 Intel Corporation
*
* 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.
*/
/**
* \file front-buffer-distraction.c
*
* Test that a fast color clear of the back buffer is properly
* resolved even if we try to "distract" the implementation by forcing
* a fast color clear resolve in the front buffer. This verifies that
* either (a) fast color clears are independently tracked between the
* front and back buffers, or (b) the implementation resolves fast
* clears before switching from back buffer rendering to front buffer
* rendering.
*
* The test operates by fast clearing the back buffer, then fast
* clearing the front buffer, then reading from the front buffer
* (forcing a front buffer resolve), then reading from the back buffer
* (forcing a back buffer resolve).
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 11;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
void
piglit_init(int argc, char **argv)
{
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
static const GLfloat green[] = { 0.0, 1.0, 0.0, 1.0 };
static const GLfloat red[] = { 1.0, 0.0, 0.0, 1.0 };
/* Clear the back buffer to green */
glClearColor(0, 1, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
/* Clear the front buffer to red */
glDrawBuffer(GL_FRONT);
glClearColor(1, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glDrawBuffer(GL_BACK);
/* Read from the front buffer and make sure that it's red */
glReadBuffer(GL_FRONT);
pass = piglit_probe_rect_rgba(0, 0, piglit_width,
piglit_height, red) && pass;
glReadBuffer(GL_BACK);
/* Read from the back buffer and make sure that it's green */
pass = piglit_probe_rect_rgba(0, 0, piglit_width,
piglit_height, green) && pass;
if (!piglit_check_gl_error(GL_NO_ERROR))
pass = false;
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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