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/*
* Copyright © 2012 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 no-color.cpp
*
* This test verifies proper operation of multisampled FBOs that lack
* a color buffer. It operates by performing identical draw
* operations in an FBO that lacks a color buffer and an FBO that has
* a color buffer, and verifying that the resulting output is the
* same.
*
* The test can run in any of the following modes:
*
* - depth: test depth buffer behaviour, using a fragment shader that
* does not compute depth.
*
* - depth-computed: test depth buffer behaviour, using a fragment
* shader that *does* compute depth.
*
* - stencil: test stencil buffer beahviour.
*
* It can also be configured to use either a combined depth/stencil
* buffer, separate depth/stencil buffers, or just a single
* depth/stencil buffer depending on the type of test.
*
* The test operates by performing the following steps:
*
* 1. Draw a test pattern to a multisampled FBO that lacks a color
* buffer (let's call this the "test FBO").
*
* 2. Blit the test pattern to a multisampled FBO that has a full
* complement of color, depth, and stencil buffers (let's call this
* the "manifest FBO").
*
* 3. Do a "manifest" operation to cause colors to be drawn that are
* dependent upon the contents of the depth or stencil buffer.
*
* 4. Blit the color buffer from the manifest FBO to the screen. This
* is the test image, and is shown in the left half of the piglit
* window.
*
* 5. Draw the test pattern again, but this time draw it directly to
* the manifest FBO.
*
* 6. Do a "manifest" operation again.
*
* 7. Blit the color buffer to the screen. This is the reference
* image, and is shown in the right half of the piglit window.
*
* 8. Compare the test and reference images to make sure they match.
*/
#include "common.h"
PIGLIT_GL_TEST_MAIN(
512 /* window_width */,
256 /* window_height */,
PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_ALPHA)
namespace {
const int pattern_width = 256, pattern_height = 256;
GLenum buffer_to_test;
Fbo test_fbo;
Fbo manifest_fbo;
ManifestProgram *manifest_program;
TestPattern *test_pattern;
void
print_usage_and_exit(char *prog_name)
{
printf("Usage: %s <num_samples> <test_type> <buffer_config?\n"
" where <test_type> is one of:\n"
" depth: test fixed pipeline depth\n"
" depth-computed: test depth value computed by a shader\n"
" stencil: test stencil\n"
" and <buffer_config> is one of:\n"
" combined: use a single combined depth/stencil buffer\n"
" separate: use separate depth and stencil buffers\n"
" single: use just a single buffer (depth or stencil)\n",
prog_name);
piglit_report_result(PIGLIT_FAIL);
}
extern "C" void
piglit_init(int argc, char **argv)
{
if (argc != 4)
print_usage_and_exit(argv[0]);
/* 1st arg: num_samples */
char *endptr = NULL;
int num_samples = strtol(argv[1], &endptr, 0);
if (endptr != argv[1] + strlen(argv[1]))
print_usage_and_exit(argv[0]);
/* 2nd arg: test_type */
if (strcmp(argv[2], "depth") == 0) {
buffer_to_test = GL_DEPTH_BUFFER_BIT;
manifest_program = new ManifestDepth;
test_pattern = new DepthSunburst(false /* compute_depth */);
} else if (strcmp(argv[2], "depth-computed") == 0) {
buffer_to_test = GL_DEPTH_BUFFER_BIT;
manifest_program = new ManifestDepth;
test_pattern = new DepthSunburst(true /* compute_depth */);
} else if (strcmp(argv[2], "stencil") == 0) {
buffer_to_test = GL_STENCIL_BUFFER_BIT;
manifest_program = new ManifestStencil;
test_pattern = new StencilSunburst;
} else {
print_usage_and_exit(argv[0]);
}
/* 3rd arg: buffer_config */
FboConfig test_fbo_config(num_samples, pattern_width, pattern_height);
test_fbo_config.color_internalformat = GL_NONE;
if (strcmp(argv[3], "combined") == 0) {
test_fbo_config.combine_depth_stencil = true;
} else if (strcmp(argv[3], "separate") == 0) {
test_fbo_config.combine_depth_stencil = false;
} else if (strcmp(argv[3], "single") == 0) {
test_fbo_config.combine_depth_stencil = false;
if (buffer_to_test == GL_DEPTH_BUFFER_BIT)
test_fbo_config.stencil_internalformat = GL_NONE;
else
test_fbo_config.depth_internalformat = GL_NONE;
} else {
print_usage_and_exit(argv[0]);
}
piglit_require_gl_version(30);
piglit_require_GLSL_version(130);
/* Skip the test if num_samples > GL_MAX_SAMPLES */
GLint max_samples;
glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
if (num_samples > max_samples)
piglit_report_result(PIGLIT_SKIP);
test_fbo.setup(test_fbo_config);
manifest_fbo.setup(FboConfig(num_samples, pattern_width,
pattern_height));
manifest_program->compile();
test_pattern->compile();
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
}
extern "C" enum piglit_result
piglit_display()
{
bool pass = true;
/* Draw the test pattern into test_fbo. */
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, test_fbo.handle);
test_fbo.set_viewport();
test_pattern->draw(TestPattern::no_projection);
/* Blit the test pattern to manifest_fbo. */
glBindFramebuffer(GL_READ_FRAMEBUFFER, test_fbo.handle);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, manifest_fbo.handle);
glBlitFramebuffer(0, 0, pattern_width, pattern_height,
0, 0, pattern_width, pattern_height,
buffer_to_test, GL_NEAREST);
/* Manifest the pattern so that it is reflected in color
* values in manifest_fbo.
*/
manifest_program->run();
/* Blit the color buffer from manifest_fbo to the screen.
* This is the test image.
*/
glBindFramebuffer(GL_READ_FRAMEBUFFER, manifest_fbo.handle);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBlitFramebuffer(0, 0, pattern_width, pattern_height,
0, 0, pattern_width, pattern_height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
/* Draw the test pattern into manifest_fbo. */
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, manifest_fbo.handle);
manifest_fbo.set_viewport();
test_pattern->draw(TestPattern::no_projection);
/* Manifest the pattern so that it is reflected in color
* values in manifest_fbo.
*/
manifest_program->run();
/* Blit the color buffer from manifest_fbo to the screen.
* This is the reference image.
*/
glBindFramebuffer(GL_READ_FRAMEBUFFER, manifest_fbo.handle);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBlitFramebuffer(0, 0, pattern_width, pattern_height,
pattern_width, 0, 2*pattern_width, pattern_height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
/* Compare the test and reference images */
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
pass = piglit_probe_rect_halves_equal_rgba(0, 0, 2*pattern_width,
pattern_height) && pass;
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
} /* Anonymous namespace */
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