// source changed by mrn@paus.ch/ max rheiner
// original source: henryj@paradise.net.nz
#include <iostream>
#include <stdlib.h> // exit()
#include <GL/glut.h>
#include "FTGLOutlineFont.h"
#include "FTGLPolygonFont.h"
#include "FTGLBitmapFont.h"
#include "FTGLTextureFont.h"
#include "FTGLPixmapFont.h"
static FTFont* fonts[5];
static int width;
static int height;
// YOU'LL PROBABLY WANT TO CHANGE THESE
#ifdef __linux__
#define DEFAULT_FONT "/usr/share/fonts/truetype/arial.ttf"
#endif
#ifdef __APPLE_CC__
#define DEFAULT_FONT "/Users/henry/Development/PROJECTS/FTGL/ftglcvs/FTGL/demo/arial.ttf"
#endif
#ifdef WIN32
#define DEFAULT_FONT "C:\\WINNT\\Fonts\\arial.ttf"
#endif
void
my_init( const char* font_filename )
{
glClearColor(0.0, 0.0, 0.0, 0.0);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
fonts[0] = new FTGLOutlineFont;
fonts[1] = new FTGLPolygonFont;
fonts[2] = new FTGLTextureFont;
fonts[3] = new FTGLBitmapFont;
fonts[4] = new FTGLPixmapFont;
for (int i=0; i< 5; i++) {
if (!fonts[i]->Open(font_filename)) {
cerr << "ERROR: Unable to open file " << font_filename << "\n";
}
else {
cout << "Reading font " << i << " from " << font_filename << endl;
int point_size = 24;
if (!fonts[i]->FaceSize(point_size)) {
cerr << "ERROR: Unable to set font face size " << point_size << "\n";
}
}
}
}
static void
do_ortho()
{
int w;
int h;
GLdouble size;
GLdouble aspect;
w = width;
h = height;
aspect = (GLdouble)w / (GLdouble)h;
// Use the whole window.
glViewport(0, 0, w, h);
// We are going to do some 2-D orthographic drawing.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
size = (GLdouble)((w >= h) ? w : h) / 2.0;
if (w <= h) {
aspect = (GLdouble)h/(GLdouble)w;
glOrtho(-size, size, -size*aspect, size*aspect,
-100000.0, 100000.0);
}
else {
aspect = (GLdouble)w/(GLdouble)h;
glOrtho(-size*aspect, size*aspect, -size, size,
-100000.0, 100000.0);
}
// Make the world and window coordinates coincide so that 1.0 in
// model space equals one pixel in window space.
glScaled(aspect, aspect, 1.0);
// Now determine where to draw things.
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void
my_reshape(int w, int h)
{
width = w;
height = h;
do_ortho( );
}
void
my_handle_key(unsigned char key, int x, int y)
{
switch (key) {
//!!ELLERS
case 'q': // Esc or 'q' Quits the program.
case 27:
{
for (int i=0; i<5; i++) {
if (fonts[i]) {
delete fonts[i];
fonts[i] = 0;
}
}
exit(1);
}
break;
default:
break;
}
}
void
draw_scene()
{
/* Set up some strings with the characters to draw. */
unsigned int count = 0;
char string[8][256];
int i;
for (i=1; i < 32; i++) { /* Skip zero - it's the null terminator! */
string[0][count] = i;
count++;
}
string[0][count] = '\0';
count = 0;
for (i=32; i < 64; i++) {
string[1][count] = i;
count++;
}
string[1][count] = '\0';
count = 0;
for (i=64; i < 96; i++) {
string[2][count] = i;
count++;
}
string[2][count] = '\0';
count = 0;
for (i=96; i < 128; i++) {
string[3][count] = i;
count++;
}
string[3][count] = '\0';
count = 0;
for (i=128; i < 160; i++) {
string[4][count] = i;
count++;
}
string[4][count] = '\0';
count = 0;
for (i=160; i < 192; i++) {
string[5][count] = i;
count++;
}
string[5][count] = '\0';
count = 0;
for (i=192; i < 224; i++) {
string[6][count] = i;
count++;
}
string[6][count] = '\0';
count = 0;
for (i=224; i < 256; i++) {
string[7][count] = i;
count++;
}
string[7][count] = '\0';
glColor3f(1.0, 1.0, 1.0);
for (int font = 0; font < 5; font++) {
GLfloat x = -250.0;
GLfloat y;
GLfloat yild = 20.0;
for (int j=0; j<4; j++) {
y = 275.0-font*120.0-j*yild;
if (font >= 3) {
glRasterPos2f(x, y);
fonts[font]->render(string[j]);
}
else {
if (font == 2) {
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
glPushMatrix(); {
glTranslatef(x, y, 0.0);
fonts[font]->render(string[j]);
} glPopMatrix();
if (font == 2) {
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
}
}
}
}
}
void
my_display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
draw_scene();
glutSwapBuffers();
}
int
file_exists( const char * filename )
{
FILE * fp = fopen( filename, "r" );
if ( fp == NULL )
{
// That fopen failed does _not_ definitely mean the file isn't there
// but for now this is ok
return 0;
}
fclose( fp );
return 1;
}
void
usage( const char * program )
{
cerr << "Usage: " << program << " <filename.ttf>\n" << endl;
}
int
main(int argc, char **argv)
{
//!!ELLERS -- cleaned up
char * filename;
glutInitWindowSize(600, 600);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE);
glutCreateWindow("FTGL demo");
if ( argc >= 2 )
{
if ( !file_exists( argv[ 1 ] ))
{
usage( argv[ 0 ]);
cerr << "Couldn't open file '" << argv[ 1 ] << "'" << endl;
exit( -1 );
}
filename = argv[ 1 ];
}
else
{
// try a default font
filename = DEFAULT_FONT;
if ( !file_exists( filename ))
{
usage( argv[ 0 ]);
cerr << "Couldn't open default file '" << filename << "'" << endl;
exit( -1 );
}
}
my_init( filename );
glutDisplayFunc(my_display);
glutReshapeFunc(my_reshape);
glutKeyboardFunc(my_handle_key);
glutMainLoop();
return 0;
}
