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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.
*
*/
/* Basic test of glDrawElementsIndirect interaction with base instance */
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 31;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
GLuint vao;
GLint prog;
float green[] = {0,1,0};
float blue[] = {0,0,1};
enum piglit_result
piglit_display(void)
{
bool pass = true;
glViewport(0, 0, 128, 128);
glClearColor(0,0,1,1);
glClear(GL_COLOR_BUFFER_BIT);
glBindVertexArray(vao);
glUseProgram(prog);
glDrawElementsIndirect(GL_TRIANGLES, GL_UNSIGNED_SHORT, (GLvoid const *)0);
glUseProgram(0);
piglit_present_results();
pass = piglit_probe_pixel_rgb(32, 32, green) && pass;
pass = piglit_probe_pixel_rgb(96, 96, blue) && pass;
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
float vertices_data[] = {
-1, -1,
1, -1,
-1, 1,
};
int instance_data[] = { 0, 0, 0, 0, 42, 0, 0 };
unsigned short indices_data[] = {
0, 1, 2,
};
GLuint indirect_data[] = {
3, /* count */
1, /* primcount */
0, /* first index */
0, /* base vertex */
4, /* base instance */
};
void
piglit_init(int argc, char **argv)
{
GLuint vertices_bo;
GLuint instance_bo;
GLuint indices_bo;
GLuint indirect_bo;
piglit_require_extension("GL_ARB_draw_indirect");
piglit_require_extension("GL_ARB_base_instance");
piglit_require_extension("GL_ARB_instanced_arrays");
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glGenBuffers(1, &vertices_bo);
glBindBuffer(GL_ARRAY_BUFFER, vertices_bo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices_data), vertices_data, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
glGenBuffers(1, &instance_bo);
glBindBuffer(GL_ARRAY_BUFFER, instance_bo);
glBufferData(GL_ARRAY_BUFFER, sizeof(instance_data), instance_data, GL_STATIC_DRAW);
glEnableVertexAttribArray(1);
glVertexAttribIPointer(1, 1, GL_INT, 0, 0);
glVertexAttribDivisorARB(1, 1);
glGenBuffers(1, &indices_bo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indices_bo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices_data), indices_data, GL_STATIC_DRAW);
glGenBuffers(1, &indirect_bo);
glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_bo);
glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(indirect_data), indirect_data, GL_STATIC_DRAW);
prog = piglit_build_simple_program(
"#version 130\n"
"#extension GL_ARB_explicit_attrib_location: require\n"
"#extension GL_ARB_draw_instanced: require\n"
"\n"
"layout(location=0) in vec2 pos;\n"
"layout(location=1) in int instance_in;\n"
"\n"
"flat out int instance;\n"
"\n"
"void main() {\n"
" gl_Position = vec4(pos, 0, 1);\n"
" instance = instance_in;\n"
"}\n",
"#version 130\n"
"\n"
"flat in int instance;\n"
"\n"
"void main() {\n"
" if (instance == 42) {\n"
" gl_FragColor = vec4(0,1,0,1);\n"
" } else {\n"
" gl_FragColor = vec4(1,0,0,1);\n"
" }\n"
"}\n");
glBindVertexArray(0);
}
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