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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.
*/
#include "piglit-util.h"
/**
* @file pushpop.c
*
* From the GL_ARB_multisample spec:
*
* "An additional group of state variables, MULTISAMPLE_BIT_ARB,
* is defined by this extension. When PushAttrib is called with
* bit MULTISAMPLE_BIT_ARB set, the multisample group of state
* variables is pushed onto the attribute stack. When PopAttrib
* is called, these state variables are restored to their
* previous values if they were pushed. Some multisample state
* is included in the ENABLE_BIT group as well. In order to avoid
* incompatibility with GL implementations that do not support
* SGIS_multisample, ALL_ATTRIB_BITS does not include
* MULTISAMPLE_BIT_ARB."
*
* Get Value Get Command Type Initial Value Attribute
* --------- ----------- ---- ------------- ---------
* MULTISAMPLE_ARB IsEnabled B TRUE multisample/enable
* SAMPLE_ALPHA_TO_COVERAGE_ARB IsEnabled B FALSE multisample/enable
* SAMPLE_ALPHA_TO_ONE_ARB IsEnabled B FALSE multisample/enable
* SAMPLE_COVERAGE_ARB IsEnabled B FALSE multisample/enable
*
* SAMPLE_COVERAGE_VALUE_ARB GetFloatv R+ 1 multisample
* SAMPLE_COVERAGE_INVERT_ARB GetBooleanv B FALSE multisample
*
*/
PIGLIT_GL_TEST_MAIN(
32 /*window_width*/,
32 /*window_height*/,
GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA)
enum piglit_result
piglit_display(void)
{
/* UNREACHED */
return PIGLIT_FAIL;
}
static bool
test_bool(GLenum e, const char *name, bool val)
{
GLboolean ret = glIsEnabled(e);
if (ret != val) {
fprintf(stderr, " %s %d doesn't match expected %d\n",
name, ret, val);
return false;
} else {
return true;
}
}
static bool
test_enable_bits(bool val)
{
bool pass = true;
pass = test_bool(GL_MULTISAMPLE, "multisample", val) && pass;
pass = test_bool(GL_SAMPLE_ALPHA_TO_COVERAGE, "alpha to coverage", val) && pass;
pass = test_bool(GL_SAMPLE_ALPHA_TO_ONE, "alpha to one", val) && pass;
pass = test_bool(GL_SAMPLE_COVERAGE, "sample coverage", val) && pass;
return pass;
}
static void
set_enable_bits(bool val)
{
if (val) {
glEnable(GL_MULTISAMPLE);
glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glEnable(GL_SAMPLE_ALPHA_TO_ONE);
glEnable(GL_SAMPLE_COVERAGE);
} else {
glDisable(GL_MULTISAMPLE);
glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glDisable(GL_SAMPLE_ALPHA_TO_ONE);
glDisable(GL_SAMPLE_COVERAGE);
}
}
static bool
test_coverage(bool mode)
{
bool pass = true;
GLboolean invert;
float expected = 0.25 + (mode ? 0.5 : 0.0), coverage;
glGetFloatv(GL_SAMPLE_COVERAGE_VALUE, &coverage);
if (coverage != expected) {
fprintf(stderr,
" coverage value %f doesn't match expected %f\n",
expected, coverage);
pass = false;
}
glGetBooleanv(GL_SAMPLE_COVERAGE_INVERT, &invert);
if (invert != mode) {
fprintf(stderr,
" coverage invert value %d doesn't match expected %d\n",
invert, mode);
pass = false;
}
return pass;
}
static bool
test_state(bool enable_on, bool coverage_mode)
{
return test_enable_bits(enable_on) & test_coverage(coverage_mode);
}
static void
set_coverage(bool mode)
{
float coverage_val = 0.25 + (mode ? 0.5 : 0.0);
glSampleCoverageARB(coverage_val, mode);
}
static bool
pushpop(GLuint bit, const char *test,
bool affects_enabled, bool affects_other)
{
printf("%s test:\n", test);
set_enable_bits(true);
set_coverage(true);
if (bit != 0) {
glPushAttrib(bit);
set_enable_bits(false);
set_coverage(false);
glPopAttrib();
}
if (!test_state(affects_enabled, affects_other))
return false;
/* Now, test the bits the other direction. Caught a bug in my
* first pass of fixing Mesa.
*/
set_enable_bits(false);
set_coverage(false);
if (bit != 0) {
glPushAttrib(bit);
set_enable_bits(true);
set_coverage(true);
glPopAttrib();
}
return test_state(!affects_enabled, !affects_other);
}
void
piglit_init(int argc, char **argv)
{
bool pass = true;
piglit_require_extension("GL_ARB_multisample");
pass = pushpop(0, "sanity test", true, true);
if (!pass)
piglit_report_result(PIGLIT_FAIL);
pass = pushpop(GL_MULTISAMPLE_BIT, "GL_MULTISAMPLE_BIT",
true, true) && pass;
pass = pushpop(GL_ENABLE_BIT, "GL_ENABLE_BIT",
true, false) && pass;
pass = pushpop(GL_ALL_ATTRIB_BITS, "GL_ALL_ATTRIB_BITS",
true, false) && pass;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
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