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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 layout-std140-write-shader.c
*
* Tests that shader storage block writes in GLSL works correctly (offsets and
* values) when interface packing qualifier is std140 and row_major.
*/
#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 44
static const char vs_pass_thru_text[] =
"#version 130\n"
"#extension GL_ARB_shader_storage_buffer_object : require\n"
"#extension GL_ARB_uniform_buffer_object : require\n"
"\n"
"struct A {\n"
" float a1;\n"
" vec2 a2[2];\n"
" mat2 a4;\n"
"};\n"
"layout(std140, row_major, binding=2) buffer ssbo {\n"
" vec4 v;\n"
" float f;\n"
" A s;\n"
" float unsized_array[];\n"
"};\n"
"in vec4 piglit_vertex;\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
" f = 4.0;\n"
" s.a2[0] = vec2(6.0, 7.0); \n"
" int index = int(v.x); // index should be zero\n"
" if ((index + gl_VertexID) < 4)\n"
" unsized_array[index + gl_VertexID] = unsized_array.length();\n"
"}\n";
static const char fs_source[] =
"#version 130\n"
"#extension GL_ARB_shader_storage_buffer_object : require\n"
"#extension GL_ARB_uniform_buffer_object : require\n"
"\n"
"struct A {\n"
" float a1;\n"
" vec2 a2[2];\n"
" mat2 a4;\n"
"};\n"
"layout(std140, row_major, binding=2) buffer ssbo {\n"
" vec4 v;\n"
" float f;\n"
" A s;\n"
" float unsized_array[];\n"
"};\n"
"out vec4 color;\n"
"\n"
"void main() {\n"
" color = vec4(0,1,0,1);\n"
" v = vec4(0.0, 1.0, 2.0, 3.0);\n"
" s.a1 = 5.0;\n"
" s.a2[1] = vec2(8.0, 9.0);\n"
" s.a4 = mat2(10.0, 11.0, 12.0, 13.0);\n"
" int index = int(v.z + gl_FragCoord.x);\n"
" if (index >= 0 && index < 4)\n"
" unsized_array[index] = unsized_array.length() * 2.0;\n"
"}\n";
GLuint prog;
float expected[SSBO_SIZE] = { 0.0, 1.0, 2.0, 3.0, // vec4 v
4.0, 0.0, 0.0, 0.0, // float f
5.0, 0.0, 0.0, 0.0, // float s.a1
6.0, 7.0, 0.0, 0.0, // vec2 s.a2[0]
8.0, 9.0, 0.0, 0.0, // vec2 s.a2[1]
10.0, 12.0, 0.0, 0.0, // mat2 a4
11.0, 13.0, 0.0, 0.0, // mat2 a4
4.0, 0.0, 0.0, 0.0, // float unsized_array[0]
4.0, 0.0, 0.0, 0.0, // float unsized_array[1]
8.0, 0.0, 0.0, 0.0, // float unsized_array[2]
8.0, 0.0, 0.0, 0.0, // float unsized_array[3]
};
void
piglit_init(int argc, char **argv)
{
bool pass = true;
GLuint buffer;
unsigned int i;
float ssbo_values[SSBO_SIZE] = {0};
float *map;
GLint num_vertex_ssbo;
piglit_require_extension("GL_ARB_shader_storage_buffer_object");
piglit_require_GLSL_version(130);
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(1, &buffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, buffer);
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);
map = (float *) glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_READ_ONLY);
for (i = 0; i < SSBO_SIZE; i++) {
if (map[i] != expected[i]) {
printf("expected[%d] = %.2f. Read value: %.2f\n",
i, expected[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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