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FreeGLUT-Vita/progs/demos/subwin/subwin.c

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/*! \file subwin.c
\ingroup demos
This program is a test harness for the subwindows
in OpenGLUT. Based Originally on shape.c demo.
\author Written by Evan Felix February 2011
\author Portions Copyright (C) 2004, the OpenGLUT project contributors. <br>
OpenGLUT branched from freeglut in February, 2004.
\image html openglut_subwin.png OpenGLUT Sub Window Demonstration
\include demos/subwin/subwin.c
*/
#include <GL/freeglut.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _MSC_VER
/* DUMP MEMORY LEAKS */
#include <crtdbg.h>
#endif
#define MAXSTR 16
char **strings;
int mainwin;
/*!
Does printf()-like work using freeglut/OpenGLUT
glutBitmapString(). Uses a fixed font. Prints
at the indicated row/column position.
Limitation: Cannot address pixels.
Limitation: Renders in screen coords, not model coords.
*/
static void shapesPrintf (int row, int col, const char *fmt, ...)
{
static char buf[256];
int viewport[4];
void *font = GLUT_BITMAP_9_BY_15;
va_list args;
va_start(args, fmt);
#if defined(WIN32) && !defined(__CYGWIN__)
(void) _vsnprintf (buf, sizeof(buf), fmt, args);
#else
(void) vsnprintf (buf, sizeof(buf), fmt, args);
#endif
va_end(args);
glGetIntegerv(GL_VIEWPORT,viewport);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0,viewport[2],0,viewport[3],-1,1);
glRasterPos2i
(
glutBitmapWidth(font, ' ') * col,
- glutBitmapHeight(font) * (row+2) + viewport[3]
);
glutBitmapString (font, (unsigned char*)buf);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
/* GLUT callback Handlers */
static void
resize(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/*gluOrtho2D(0, width, 0, height);*/
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;
}
static void display(void)
{
int win = glutGetWindow();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3d(1,0,0);
glDisable(GL_LIGHTING);
glColor3d(0.1,0.1,0.4);
if (win == mainwin)
{
shapesPrintf (2, 3, "Move The mouse into different windows");
shapesPrintf (3, 3, "pressing keys will add to the string");
shapesPrintf (5, 3, "Window: %d", win);
shapesPrintf (6, 3, "String: %s", strings[win]);
}
else
{
shapesPrintf (1, 3, "Window: %d", win);
shapesPrintf (2, 3, "String: %s", strings[win]);
}
glutSwapBuffers();
}
static void
key(unsigned char key, int x, int y)
{
char *s,str[2];
int win = glutGetWindow();
switch (key)
{
case 27 :
case 'Q':
case 'q': glutLeaveMainLoop () ; break;
default:
s=strings[win];
if (strlen(s)+1>MAXSTR) {
s[0]=0;
}
str[0]=key;
str[1]=0;
strcat(s,str);
break;
}
glutPostRedisplay();
}
static void special (int key, int x, int y)
{
switch (key)
{
default:
break;
}
glutPostRedisplay();
}
static void
entry(int state)
{
int win = glutGetWindow();
printf("Win: %d, state: %d\n",win,state);
}
/* Program entry point */
int
main(int argc, char *argv[])
{
int winmax,sw1,sw2,sw2sw,i;
glutInitWindowSize(640,480);
glutInitWindowPosition(40,40);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
glutCreateWindow("FreeGLUT Sub Windows");
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
glutSpecialFunc(special);
glutEntryFunc(entry);
glutSetOption ( GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION ) ;
glClearColor(1,1,1,1);
mainwin = glutGetWindow();
winmax=mainwin;
sw1=glutCreateSubWindow(mainwin,4,240,314,236);
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
glutSpecialFunc(special);
glutEntryFunc(entry);
glClearColor(0.7f,0.7f,0.7f,1);
winmax = sw1 > winmax ? sw1 : winmax;
sw2=glutCreateSubWindow(mainwin,322,240,314,236);
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
glutSpecialFunc(special);
glutEntryFunc(entry);
glClearColor(0.7f,0.7f,0.7f,1);
winmax = sw2 > winmax ? sw2 : winmax;
sw2sw=glutCreateSubWindow(sw2,10,128,294,98);
glutReshapeFunc(resize);
glutDisplayFunc(display);
glutKeyboardFunc(key);
glutSpecialFunc(special);
glutEntryFunc(entry);
glClearColor(0.4f,0.4f,0.4f,1);
winmax = sw2sw > winmax ? sw2sw : winmax;
strings = malloc(sizeof(char *)*(winmax+1));
for (i=0;i<winmax+1;i++) {
strings[i] = malloc(sizeof(char)*MAXSTR+1);
strings[i][0]=0;
}
glutMainLoop();
#ifdef _MSC_VER
/* DUMP MEMORY LEAK INFORMATION */
_CrtDumpMemoryLeaks () ;
#endif
return EXIT_SUCCESS;
}