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/*
* Copyright © 2013 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 fragment-discard.c
*
* Check that atomic counter operations from discarded fragments have
* no effect.
*/
#include "common.h"
#define L 256
#define N (L * L)
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 31;
config.window_width = 1;
config.window_height = 1;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
static bool
run_test(void)
{
const char *fs_source = "#version 140\n"
"#extension GL_ARB_shader_atomic_counters : enable\n"
"\n"
"layout(binding = 0, offset = 0) uniform atomic_uint x;\n"
"layout(binding = 0, offset = 4) uniform atomic_uint y;\n"
"out ivec4 fcolor;\n"
"\n"
"void main() {\n"
" if ((atomicCounterIncrement(x) & 0x3u) == 0u)\n"
" discard;\n"
"\n"
" fcolor.x = int(atomicCounterIncrement(y));\n"
"}\n";
const char *vs_source = "#version 140\n"
"in vec4 piglit_vertex;\n"
"\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
"}\n";
const uint32_t start_value[] = { 0, 0 };
const uint32_t expected_value[] = { N, N * 3/4 };
GLuint prog = glCreateProgram();
bool ret = atomic_counters_compile(prog, GL_FRAGMENT_SHADER, fs_source) &&
atomic_counters_compile(prog, GL_VERTEX_SHADER, vs_source) &&
atomic_counters_draw_rect(prog, 2, start_value) &&
atomic_counters_probe_buffer(0, 2, expected_value);
glDeleteProgram(prog);
return ret;
}
void
piglit_init(int argc, char **argv)
{
GLuint fb, rb, buffer;
piglit_require_gl_version(31);
piglit_require_extension("GL_ARB_shader_atomic_counters");
glGenFramebuffers(1, &fb);
glGenRenderbuffers(1, &rb);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
glBindRenderbuffer(GL_RENDERBUFFER, rb);
glRenderbufferStorage(GL_RENDERBUFFER, GL_R32UI, L, L);
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, rb);
glGenBuffers(1, &buffer);
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, buffer);
glViewport(0, 0, L, L);
piglit_report_result(run_test() ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL; /* UNREACHED */
}
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