/*
......... 2015 Ivan Mahonin
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <ctime>
#include <cassert>
#include <iostream>
#include <iomanip>
#include <GL/gl.h>
#include <GL/glext.h>
#include <GL/glx.h>
#include "test.h"
#include "shaders.h"
#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display*, GLXFBConfig, GLXContext, Bool, const int*);
using namespace std;
clock_t get_clock() {
return clock();
}
int main() {
// open display (we will use default display and screen 0)
Display *display = XOpenDisplay(NULL);
assert(display);
// choose config
int config_attribs[] = {
GLX_DOUBLEBUFFER, False,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_DEPTH_SIZE, 24,
GLX_STENCIL_SIZE, 8,
GLX_ACCUM_RED_SIZE, 8,
GLX_ACCUM_GREEN_SIZE, 8,
GLX_ACCUM_BLUE_SIZE, 8,
GLX_ACCUM_ALPHA_SIZE, 8,
GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
None };
int nelements = 0;
GLXFBConfig *configs = glXChooseFBConfig(display, 0, config_attribs, &nelements);
assert(configs != NULL && nelements > 0);
GLXFBConfig config = configs[0];
assert(config);
// create pbuffer
int pbuffer_width = 256;
int pbuffer_height = 256;
int pbuffer_attribs[] = {
GLX_PBUFFER_WIDTH, pbuffer_width,
GLX_PBUFFER_HEIGHT, pbuffer_height,
None };
GLXPbuffer pbuffer = glXCreatePbuffer(display, config, pbuffer_attribs);
assert(pbuffer);
// create context
int context_attribs[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 3,
None };
GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddress((const GLubyte*)"glXCreateContextAttribsARB");
GLXContext context = glXCreateContextAttribsARB(display, config, NULL, True, context_attribs);
assert(context);
// make context current
glXMakeContextCurrent(display, pbuffer, pbuffer, context);
// frame buffer
int framebuffer_width = 2048;
int framebuffer_height = 2048;
GLuint texture_id = 0;
glGenTextures(1, &texture_id);
glBindTexture(GL_TEXTURE_2D, texture_id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, framebuffer_width, framebuffer_height, 0, GL_RGBA, GL_FLOAT, NULL);
GLuint renderbuffer_id = 0;
glGenRenderbuffers(1, &renderbuffer_id);
glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer_id);
glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, framebuffer_width, framebuffer_height);
GLuint framebuffer_id = 0;
glGenFramebuffers(1, &framebuffer_id);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer_id);
glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer_id);
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, framebuffer_id);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture_id, 0);
glFramebufferTexture(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture_id, 0);
// set view port
glViewport(0, 0, framebuffer_width, framebuffer_height);
Shaders::initialize();
// do something
//Test::test1();
Test::test2();
Test::test3();
Shaders::deinitialize();
// deinitialization
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &framebuffer_id);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(1, &renderbuffer_id);
glBindTexture(GL_TEXTURE_2D, 0);
glDeleteTextures(1, &texture_id);
glXMakeContextCurrent(display, None, None, NULL);
glXDestroyContext(display, context);
glXDestroyPbuffer(display, pbuffer);
XCloseDisplay(display);
cout << "done" << endl;
return 0;
}