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/*
* Copyright © 2012 VMware, 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.
*/
/**
* Test that FBO memory is initialized to a constant color and not stale
* data that may show old contents of VRAM.
*
* To pass this test an OpenGL implementation should initialize the
* contents of the new buffer to some fixed value (like all zeros).
* But since that's not spec'd by OpenGL, we only return WARN instead of
* FAIL if that's not the case.
*
* Brian Paul
* June 2012
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 512;
config.window_height = 512;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static GLuint fbo, rb;
enum piglit_result
piglit_display(void)
{
GLfloat firstPixel[4];
bool pass = true;
/* read from fbo, draw to window */
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glDrawBuffer(GL_BACK);
/* init color buffer to red */
glClearColor(1, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
/* copy (undefined) fbo image to window */
glWindowPos2i(0, 0);
glCopyPixels(0, 0, piglit_width, piglit_height, GL_COLOR);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glReadBuffer(GL_BACK);
glReadPixels(0, 0, 1, 1, GL_RGBA, GL_FLOAT, firstPixel);
pass = piglit_probe_rect_rgb(0, 0, piglit_width, piglit_height,
firstPixel);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_WARN;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_ARB_framebuffer_object");
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glGenRenderbuffers(1, &rb);
glBindRenderbuffer(GL_RENDERBUFFER, rb);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA,
piglit_width, piglit_height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, rb);
if (!piglit_check_gl_error(GL_NO_ERROR)) {
printf("fbo creation error\n");
piglit_report_result(PIGLIT_FAIL);
return;
}
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
GL_FRAMEBUFFER_COMPLETE) {
printf("fbo incomplete\n");
piglit_report_result(PIGLIT_FAIL);
return;
}
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glViewport(0, 0, piglit_width, piglit_height);
}
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