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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 clearbuffer-depth.c
* Verify clearing depth buffers with glClearBufferfv
*
* This test works by generating several framebuffer objects and attempting to
* clear the depth buffer of those FBOs by calling \c glClearBufferfv.
*
* - An FBO with only a color attachment. This should not generate an
* error, but the color data should not be modified.
*
* - An FBO with only a depth attachment.
*
* - An FBO with a depth attachment and a color attachment. The color
* data should not be modified.
*
* - An FBO with a depth attachment and a stencil attachment. The stencil
* data should not be modified.
*
* - An FBO with a packed depth/stencil attachment. The stencil data
* should not be modified.
*
* In each case, \c glClearBufferfv is called twice. Each call uses a
* different clear value. This ensures that the test doesn't erroneously pass
* because the depth buffer was already filled with the clear color.
*
* \author Ian Romanick
*/
#include "piglit-util-gl.h"
#include "clearbuffer-common.h"
void piglit_init(int argc, char **argv)
{
static const struct {
bool color;
bool stencil;
bool depth;
bool packed;
} test_vectors[] = {
{ true, false, false, false },
{ false, false, true, false },
{ true, false, true, false },
{ false, true, true, false },
{ true, true, true, false },
{ false, true, true, true },
{ true, true, true, true },
};
static const float first[4] = { 0.5, 1.0, 1.0, 1.0 };
static const float second[4] = { 0.8, 0.0, 0.0, 0.0 };
unsigned i;
bool pass = true;
piglit_require_gl_version(30);
for (i = 0; i < ARRAY_SIZE(test_vectors); i++) {
GLenum err;
GLuint fb = generate_simple_fbo(test_vectors[i].color,
test_vectors[i].stencil,
test_vectors[i].depth,
test_vectors[i].packed);
if (fb == 0) {
if (!piglit_automatic) {
printf("Skipping framebuffer %s color, "
"%s depth, and "
"%s stencil (%s).\n",
test_vectors[i].color
? "with" : "without",
test_vectors[i].depth
? "with" : "without",
test_vectors[i].stencil
? "with" : "without",
test_vectors[i].packed
? "packed" : "separate");
}
continue;
}
if (!piglit_automatic) {
printf("Trying framebuffer %s color, "
"%s depth and "
"%s stencil (%s)...\n",
test_vectors[i].color ? "with" : "without",
test_vectors[i].depth ? "with" : "without",
test_vectors[i].stencil ? "with" : "without",
test_vectors[i].packed ? "packed" : "separate");
}
/* The GL spec says nothing about generating an error for
* clearing a buffer that does not exist. Certainly glClear
* does not.
*/
glClearBufferfv(GL_DEPTH, 0, first);
err = glGetError();
if (err != GL_NO_ERROR) {
fprintf(stderr,
"First call to glClearBufferfv erroneously "
"generated a GL error (%s, 0x%04x)\n",
piglit_get_gl_error_name(err), err);
pass = false;
}
pass = simple_probe(test_vectors[i].color,
default_color,
test_vectors[i].stencil,
default_stencil,
test_vectors[i].depth,
first[0])
&& pass;
glClearBufferfv(GL_DEPTH, 0, second);
err = glGetError();
if (err != GL_NO_ERROR) {
fprintf(stderr,
"Second call to glClearBufferfv erroneously "
"generated a GL error (%s, 0x%04x)\n",
piglit_get_gl_error_name(err), err);
pass = false;
}
pass = simple_probe(test_vectors[i].color,
default_color,
test_vectors[i].stencil,
default_stencil,
test_vectors[i].depth,
second[0])
&& pass;
glDeleteFramebuffers(1, &fb);
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
}
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
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