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/*
* Copyright © 2011 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 fbo-missing-attachment-clear.c
* Verify that a color clear on a depth-only FBO doesn't crash
*
* From the ARB_ES2_compatibility spec:
*
* (8) How should we handle draw buffer completeness?
*
* RESOLVED: Remove draw/readbuffer completeness checks, and treat
* drawbuffers referring to missing attachments as if they were NONE.
*
* It is valid to have a depth-only FBO that has the draw buffer set to values
* other than \c GL_NONE. However, doing operations that would read from or
* draw to these missing attachments should treat them as though they were
* \c GL_NONE (i.e., don't crash).
*
* See also https://bugs.freedesktop.org/show_bug.cgi?id=37739.
*
* \author Ian Romanick <ian.d.romanick@intel.com>
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 32;
config.window_height = 32;
config.window_visual = PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLuint tex;
GLuint fb;
GLenum status;
bool pass;
piglit_require_extension("GL_ARB_framebuffer_object");
piglit_require_extension("GL_ARB_ES2_compatibility");
/* Create a depth-only FBO.
*/
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 32, 32, 0,
GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
glGenFramebuffers(1, &fb);
glBindFramebuffer(GL_FRAMEBUFFER, fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_TEXTURE_2D, tex, 0);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE) {
fprintf(stderr, "FBO erroneously incomplete: 0x%04x\n",
status);
piglit_report_result(PIGLIT_FAIL);
}
/* Clear the depth buffer to a known value.
*/
printf("Clearing depth buffer to 0.0...\n");
glClearDepth(0.0);
glClear(GL_DEPTH_BUFFER_BIT);
pass = piglit_probe_rect_depth(0, 0, piglit_width, piglit_height, 0.0);
/* Clear the depth buffer and the color buffer to different values.
*/
printf("Clearing depth buffer to 0.5...\n");
glClearDepth(0.5);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
pass = piglit_probe_rect_depth(0, 0, piglit_width, piglit_height, 0.5)
&& pass;
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
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