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kc3-lang/ftgl/msvc/demo.cpp
sammy
- msvc/demo.cpp
-
// 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" using namespace std; #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( font_filename ); fonts[1] = new FTGLPolygonFont( font_filename ); fonts[2] = new FTGLTextureFont( font_filename ); fonts[3] = new FTGLBitmapFont( font_filename ); fonts[4] = new FTGLPixmapFont( font_filename ); 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; }