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/*
* Copyright © 2016 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 fs-non-uniform-control-flow-ssbo.c
*
* It checks that shader storage block writes to double type variables in GLSL
* works correctly when the writes are under non-uniform control flow.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 62;
config.window_height = 62;
config.supports_gl_compat_version = 32;
config.supports_gl_core_version = 32;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
#define SSBO_SIZE 12
static const char vs_pass_thru_text[] =
"#version 130\n"
"\n"
"in vec4 piglit_vertex;\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
"}\n";
static const char fs_source[] =
"#version 400\n"
"#extension GL_ARB_shader_storage_buffer_object : require\n"
"\n"
"out vec4 color;\n"
"\n"
"layout(std430, binding=2) buffer ssbo {\n"
" dvec2 color2[];\n"
"};\n"
"\n"
"void main() {\n"
" int cx = int(gl_FragCoord.x) / 31;\n"
" int cy = int(gl_FragCoord.y) / 31;\n"
" bool res = false;\n"
" if ((cx + cy) % 2 == 0) {\n"
" color2[0] = dvec2(1.0lf, 0.0lf);\n"
" } else {\n"
" color2[1] = dvec2(0.0lf, 1.0lf);\n"
" res = true;\n"
" }\n"
" dvec2 rg;\n"
" if (res)\n"
" rg = color2[1];\n"
" else\n"
" rg = color2[0];\n"
" color = vec4(rg, 0, 1);\n"
"}\n";
GLuint prog, fbo;
void
piglit_init(int argc, char **argv)
{
GLuint buffer;
double ssbo_values[SSBO_SIZE] = {0};
piglit_require_extension("GL_ARB_shader_storage_buffer_object");
piglit_require_GLSL_version(400);
prog = piglit_build_simple_program(vs_pass_thru_text, fs_source);
glUseProgram(prog);
glClearColor(0, 0, 0, 1);
glGenBuffers(1, &buffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, buffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, SSBO_SIZE*sizeof(GLdouble),
&ssbo_values[0], GL_DYNAMIC_DRAW);
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
}
enum piglit_result piglit_display(void)
{
bool pass = true;
const int num_pixels = piglit_width * piglit_height;
float *srcPixels = malloc(num_pixels * 4 * sizeof(float));
float expected[4];
int i, j;
glViewport(0, 0, piglit_width, piglit_height);
glUseProgram(prog);
glClear(GL_COLOR_BUFFER_BIT);
piglit_draw_rect(-1, -1, 2, 2);
glReadPixels(0, 0, piglit_width, piglit_height,
GL_RGBA, GL_FLOAT, srcPixels);
/* Verify */
for (i = 0; i < piglit_height; i++) {
for (j = 0; j < piglit_width; j++) {
int cx = j / 31;
int cy = i / 31;
int pos = (i * piglit_width + j) * 4;
if ((cx + cy) % 2 != 0) {
expected[0] = 0.0;
expected[1] = 1.0;
expected[2] = 0.0;
expected[3] = 1.0;
} else {
expected[0] = 1.0;
expected[1] = 0.0;
expected[2] = 0.0;
expected[3] = 1.0;
}
pass = piglit_compare_pixels(j, i, expected,
srcPixels + pos,
piglit_tolerance,
4) && pass;
}
}
piglit_present_results();
free(srcPixels);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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