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/*
* Copyright © 2011 Henri Verbeet <hverbeet@gmail.com>
* Copyright 2011 Red Hat, Inc.
*
* 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 fbo-sys-sub-blit.c
*
* Test FBO blits involving a subset of the window-system buffer.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
128 /*window_width*/,
128 /*window_height*/,
GLUT_DOUBLE | GLUT_RGB)
enum piglit_result piglit_display(void)
{
const float green[] = {0.0f, 1.0f, 0.0f};
const float red[] = {1.0f, 0.0f, 0.0f};
int w = piglit_width;
int h = piglit_height;
bool success = 1;
glDrawBuffer(GL_BACK);
/* paint the back buffer green */
glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
/* blit back to front */
glDrawBuffer(GL_FRONT);
glReadBuffer(GL_BACK);
glBlitFramebufferEXT(0, 0, w, h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_LINEAR);
/* paint the back buffer red */
glDrawBuffer(GL_BACK);
glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
/* paint a square in the middle of the front buffer red */
glDrawBuffer(GL_FRONT);
glReadBuffer(GL_BACK);
glBlitFramebufferEXT(w / 4, h / 4, 3 * w / 4, 3 * h / 4,
w / 4, h / 4, 3 * w / 4, 3 * h / 4,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
glReadBuffer(GL_FRONT);
/* the middle should be red */
success &= piglit_probe_pixel_rgb(w / 2, h / 2, red);
/* the corners should be green */
success &= piglit_probe_pixel_rgb(0, 0, green);
success &= piglit_probe_pixel_rgb(w - 1, 0, green);
success &= piglit_probe_pixel_rgb(0, h - 1, green);
success &= piglit_probe_pixel_rgb(w - 1, h - 1, green);
glFlush();
return success ? PIGLIT_PASS : PIGLIT_FAIL;
}
void piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_framebuffer_object");
piglit_require_extension("GL_EXT_framebuffer_blit");
}
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