blender/intern/cycles/util/util_view.cpp

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/*
* Copyright 2011, Blender Foundation.
*
* 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 2
* 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, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util_opengl.h"
#include "util_time.h"
#include "util_view.h"
#ifdef __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
CCL_NAMESPACE_BEGIN
/* structs */
struct View {
ViewInitFunc initf;
ViewExitFunc exitf;
ViewResizeFunc resize;
ViewDisplayFunc display;
ViewKeyboardFunc keyboard;
bool first_display;
bool redraw;
int width, height;
} V;
/* public */
static void view_display_text(int x, int y, const char *text)
{
const char *c;
glRasterPos3f(x, y, 0);
for(c = text; *c != '\0'; c++)
glutBitmapCharacter(GLUT_BITMAP_HELVETICA_10, *c);
}
void view_display_info(const char *info)
{
const int height = 20;
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f(0.1f, 0.1f, 0.1f, 0.8f);
glRectf(0.0f, V.height - height, V.width, V.height);
glDisable(GL_BLEND);
glColor3f(0.5f, 0.5f, 0.5f);
view_display_text(10, 7 + V.height - height, info);
glColor3f(1.0f, 1.0f, 1.0f);
}
static void view_display()
{
if(V.first_display) {
if(V.initf) V.initf();
if(V.exitf) atexit(V.exitf);
V.first_display = false;
}
glClearColor(0.05f, 0.05f, 0.05f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0, V.width, 0, V.height);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRasterPos3f(0, 0, 0);
if(V.display)
V.display();
glutSwapBuffers();
}
static void view_reshape(int width, int height)
{
if(width <= 0 || height <= 0)
return;
V.width = width;
V.height = height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
if(V.resize)
V.resize(width, height);
}
static void view_keyboard(unsigned char key, int x, int y)
{
if(V.keyboard)
V.keyboard(key);
if(key == 'm')
printf("mouse %d %d\n", x, y);
if(key == 'q') {
if(V.exitf) V.exitf();
exit(0);
}
}
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static void view_idle(void)
{
if(V.redraw) {
V.redraw = false;
glutPostRedisplay();
}
time_sleep(0.1f);
}
void view_main_loop(const char *title, int width, int height,
ViewInitFunc initf, ViewExitFunc exitf,
ViewResizeFunc resize, ViewDisplayFunc display,
ViewKeyboardFunc keyboard)
{
const char *name = "app";
char *argv = (char*)name;
int argc = 1;
memset(&V, 0, sizeof(V));
V.width = width;
V.height = height;
V.first_display = true;
V.redraw = false;
V.initf = initf;
V.exitf = exitf;
V.resize = resize;
V.display = display;
V.keyboard = keyboard;
glutInit(&argc, &argv);
glutInitWindowSize(width, height);
glutInitWindowPosition(0, 0);
glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow(title);
#ifndef __APPLE__
glewInit();
#endif
view_reshape(width, height);
glutDisplayFunc(view_display);
glutIdleFunc(view_idle);
glutReshapeFunc(view_reshape);
glutKeyboardFunc(view_keyboard);
glutMainLoop();
}
void view_redraw()
{
V.redraw = true;
}
CCL_NAMESPACE_END