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#include <iostream>
#include "gpudataviz.h"
#include "boring_parts.h"
#include "gtk_win_main.h"
#include "my_GTK_GL_scene.h"
// Macro to make things readable in main() function
#define EXIT_IF_FAIL(val, expr) do { \
if ( ! (expr) ) { \
std::cerr << "Init error " << val << std::endl; \
exit(val); \
} \
} while(0)
#define CALL_TRACE do { \
std::cout << "trace " <<__PRETTY_FUNCTION__ << std::endl; \
} while(0)
int main(int argc, char* argv[]) {
CALL_TRACE;
int meshWidth=64, meshHeight=64; // TODO : those vars should not be hardcoded
// Initialize GTK
Gtk::Main gtkKit(argc, argv); // gtk itself
Gtk::GL::init(argc, argv); // gtkglextmm
// Query and print OpenGL version
int glVersionMajor, glVersionMinor;
EXIT_IF_FAIL(1, Gdk::GL::query_version(glVersionMajor, glVersionMinor) );
std::cout << "OpenGL extension version - " << glVersionMajor << "." << glVersionMinor << std::endl;
// Initialize OpenGL
Gdk::GL::ConfigMode glMode = Gdk::GL::MODE_RGB | Gdk::GL::MODE_DEPTH | Gdk::GL::MODE_DOUBLE;
Glib::RefPtr<Gdk::GL::Config> glconfig;
EXIT_IF_FAIL(2, glconfig=Gdk::GL::Config::create(glMode) );
// Initialize OpenCL
EXIT_IF_FAIL(3, initOpenCL()==0 ); // See boring_parts.cc
// Initialize host work memory (array for all the vertex coordinates computed by OpenCL and displayed by OpenGL)
cl_float4 *hostWorkMem = (cl_float4 *) calloc(meshWidth * meshHeight, sizeof(cl_float4));
EXIT_IF_FAIL(4, hostWorkMem);
// Initialize the OpenGL scene
MyGTKGLScene glScene(glconfig);
// Instantiate and run the GTK app
GTKWinMain gtkwinmain(glScene);
gtkKit.run(gtkwinmain);
return 0;
}
/* MyGTKGLScene implementation
I want to keep interesting code part in this file
in natural reading order
*/
MyGTKGLScene::MyGTKGLScene(Glib::RefPtr<Gdk::GL::Config> &glconfig) {
CALL_TRACE;
set_gl_capability(glconfig); // Set OpenGL-capability to the widget.
}
MyGTKGLScene::~MyGTKGLScene() {
CALL_TRACE;
}
void MyGTKGLScene::on_size_request(Gtk::Requisition* requisition) {
CALL_TRACE;
*requisition = Gtk::Requisition();
requisition->width = 320; requisition->height = 240;
}
void MyGTKGLScene::on_realize() {
CALL_TRACE; // This run once at window creation time
Gtk::DrawingArea::on_realize();
Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
// *** OpenGL BEGIN ***
if (!glwindow->gl_begin(get_gl_context())) {
std::cerr << "Oups : glwindow->gl_begin(get_gl_context())" << std::endl;
return;
}
GLUquadricObj* qobj = gluNewQuadric();
gluQuadricDrawStyle(qobj, GLU_FILL);
glNewList(1, GL_COMPILE);
gluSphere(qobj, 1.0, 20, 20);
glEndList();
static GLfloat light_diffuse[] = {1.0, 0.0, 0.0, 1.0};
static GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0};
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glClearColor(1.0, 1.0, 1.0, 1.0);
glClearDepth(1.0);
/*
glViewport(0, 0, get_width(), get_height());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(40.0, 1.0, 1.0, 10.0);
glMatrixMode(GL_MODELVIEW);
*/
glLoadIdentity();
gluLookAt(0.0, 0.0, 3.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0);
glTranslatef(0.0, 0.0, -3.0);
glwindow->gl_end();
// *** OpenGL END ***
}
bool MyGTKGLScene::on_configure_event(GdkEventConfigure* event) {
CALL_TRACE ; // This run mainly when GTK GL Widget is resized
Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
// *** OpenGL BEGIN ***
if (!glwindow->gl_begin(get_gl_context())) {
std::cerr << "Oups : glwindow->gl_begin(get_gl_context())" << std::endl;
return false;
}
int width = get_width();
int height = get_height();
GLdouble ratio = (GLdouble) width/height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, ratio, 0.1, 10.0);
glMatrixMode(GL_MODELVIEW);
glwindow->gl_end();
// *** OpenGL END ***
return true;
}
bool MyGTKGLScene::on_expose_event(GdkEventExpose* event) {
CALL_TRACE ; // This run mainly when GTK GL Widget have to be redrawn
Glib::RefPtr<Gdk::GL::Window> glwindow = get_gl_window();
// *** OpenGL BEGIN ***
if (!glwindow->gl_begin(get_gl_context())) {
std::cerr << "Oups : glwindow->gl_begin(get_gl_context())" << std::endl;
return false;
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glCallList(1);
glwindow->gl_end();
// *** OpenGL END ***
// Display the rendered image
glwindow->swap_buffers();
return true;
}
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