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/*
* Copyright © 2015 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 array-ssbo-binding.c
*
* Tests that modifying the binding point of an array of shader
* storage block works correctly, i.e., former attached buffer is not
* modified and the other is.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 100;
config.window_height = 100;
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 4
static const char vs_pass_thru_text[] =
"#version 330\n"
"#extension GL_ARB_shader_storage_buffer_object : require\n"
"\n"
"layout(std140, binding=2) buffer ssbo {\n"
" vec4 v;\n"
"} a[2];\n"
"\n"
"in vec4 piglit_vertex;\n"
"\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
" a[0].v = a[0].v + 1.0;\n"
" a[1].v = a[1].v + 10.0;\n"
"}\n";
static const char fs_source[] =
"#version 330\n"
"#extension GL_ARB_shader_storage_buffer_object : require\n"
"\n"
"out vec4 color;\n"
"\n"
"layout(std140, binding=2) buffer ssbo {\n"
" vec4 v;\n"
"} a[2];\n"
"\n"
"void main() {\n"
" color = a[0].v;\n"
"}\n";
GLuint prog;
void
piglit_init(int argc, char **argv)
{
bool pass = true;
GLuint buffer[2];
unsigned int i;
float ssbo_values[SSBO_SIZE] = {0};
float *map;
int index;
GLint num_vertex_ssbo;
piglit_require_extension("GL_ARB_shader_storage_buffer_object");
piglit_require_extension("GL_ARB_program_interface_query");
glGetIntegerv(GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS, &num_vertex_ssbo);
if (num_vertex_ssbo < 1)
piglit_report_result(PIGLIT_SKIP);
prog = piglit_build_simple_program(vs_pass_thru_text, fs_source);
glUseProgram(prog);
glClearColor(0, 0, 0, 0);
glGenBuffers(2, buffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, buffer[0]);
glBufferData(GL_SHADER_STORAGE_BUFFER, SSBO_SIZE*sizeof(GLfloat),
&ssbo_values[0], GL_DYNAMIC_DRAW);
/* Change binding point */
index = glGetProgramResourceIndex(prog,
GL_SHADER_STORAGE_BLOCK, "ssbo[0]");
glShaderStorageBlockBinding(prog, index, 4);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, buffer[1]);
glBufferData(GL_SHADER_STORAGE_BUFFER, SSBO_SIZE*sizeof(GLfloat),
&ssbo_values[0], GL_DYNAMIC_DRAW);
glViewport(0, 0, piglit_width, piglit_height);
piglit_draw_rect(-1, -1, 2, 2);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer[0]);
map = (float *) glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_READ_ONLY);
/* Former bound buffer should not be modified */
for (i = 0; i < SSBO_SIZE; i++) {
if (map[i] != 0) {
printf("Wrong %d value in buffer[0]: %.2f\n",
i, map[i]);
pass = false;
}
}
glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer[1]);
map = (float *) glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_READ_ONLY);
for (i = 0; i < SSBO_SIZE; i++) {
/* Values should be below ten but different than zero */
if (map[i] == 0 || map[i] > 10) {
printf("Wrong %d value in buffer[1]: %.2f\n",
i, map[i]);
pass = false;
}
}
glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
if (!piglit_check_gl_error(GL_NO_ERROR))
pass = false;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result piglit_display(void)
{
/* UNREACHED */
return PIGLIT_FAIL;
}
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