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//
// GLUT font routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
// The stroked text code was copied from FreeGLUT 2.4.0 which carries
// the following notice:
//
// Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
//
// (sort of) emulation of Glut's bitmap drawing functions, using FL's
// font stuff. Not all the fonts match!
#include <config.h>
#if HAVE_GL
# include <FL/glut.H>
Fl_Glut_Bitmap_Font glutBitmap9By15 = {FL_SCREEN, 15};
Fl_Glut_Bitmap_Font glutBitmap8By13 = {FL_SCREEN, 13};
Fl_Glut_Bitmap_Font glutBitmapTimesRoman10 = {FL_TIMES, 10};
Fl_Glut_Bitmap_Font glutBitmapTimesRoman24 = {FL_TIMES, 24};
Fl_Glut_Bitmap_Font glutBitmapHelvetica10 = {FL_HELVETICA, 10};
Fl_Glut_Bitmap_Font glutBitmapHelvetica12 = {FL_HELVETICA, 12};
Fl_Glut_Bitmap_Font glutBitmapHelvetica18 = {FL_HELVETICA, 18};
void glutBitmapCharacter(void* font, int character) {
gl_font(((Fl_Glut_Bitmap_Font *)font)->font,((Fl_Glut_Bitmap_Font *)font)->size);
char a[1]; a[0] = character;
gl_draw(a,1);
}
int glutBitmapHeight(void* font) {
gl_font(((Fl_Glut_Bitmap_Font *)font)->font,((Fl_Glut_Bitmap_Font *)font)->size);
return gl_height();
}
int glutBitmapLength(void *font, const unsigned char *string) {
gl_font(((Fl_Glut_Bitmap_Font *)font)->font,((Fl_Glut_Bitmap_Font *)font)->size);
const char *s = (const char*)string;
return int(gl_width(s)+.5);
}
void glutBitmapString(void *font, const unsigned char *string) {
gl_font(((Fl_Glut_Bitmap_Font *)font)->font,((Fl_Glut_Bitmap_Font *)font)->size);
const char *s = (const char*)string;
gl_draw(s);
}
int glutBitmapWidth(void* font, int character) {
gl_font(((Fl_Glut_Bitmap_Font *)font)->font,((Fl_Glut_Bitmap_Font *)font)->size);
return int(gl_width(character)+.5);
}
/*
* Draw a stroke character
*/
void glutStrokeCharacter(void* fontID, int character) {
const Fl_Glut_StrokeChar *schar;
const Fl_Glut_StrokeStrip *strip;
int i, j;
Fl_Glut_StrokeFont* font = (Fl_Glut_StrokeFont *)fontID;
if (character < 0 || character >= font->Quantity) return;
schar = font->Characters[character];
if (!schar) return;
strip = schar->Strips;
for (i = 0; i < schar->Number; i++, strip++)
{
glBegin(GL_LINE_STRIP);
for (j = 0; j < strip->Number; j++)
glVertex2f(strip->Vertices[j].X, strip->Vertices[j].Y);
glEnd();
}
glTranslatef(schar->Right, 0.0, 0.0);
}
void glutStrokeString(void* fontID, const unsigned char *string) {
unsigned char c;
int i, j;
float length = 0.0;
Fl_Glut_StrokeFont* font = (Fl_Glut_StrokeFont *)fontID;
if (!string || ! *string) return;
/*
* Step through the string, drawing each character.
* A newline will simply translate the next character's insertion
* point back to the start of the line and down one line.
*/
while ((c = *string++) != 0) {
if (c < font->Quantity) {
if (c == '\n') {
glTranslatef(-length, -(float)(font->Height), 0.0);
length = 0.0;
} else {
/* Not an EOL, draw the bitmap character */
const Fl_Glut_StrokeChar *schar = font->Characters[c];
if (schar) {
const Fl_Glut_StrokeStrip *strip = schar->Strips;
for (i = 0; i < schar->Number; i++, strip++) {
glBegin(GL_LINE_STRIP);
for (j = 0; j < strip->Number; j++)
glVertex2f(strip->Vertices[j].X, strip->Vertices[j].Y);
glEnd();
}
length += schar->Right;
glTranslatef(schar->Right, 0.0, 0.0);
}
}
}
}
}
/*
* Return the width in pixels of a stroke character
*/
int glutStrokeWidth( void* fontID, int character )
{
const Fl_Glut_StrokeChar *schar;
Fl_Glut_StrokeFont* font = (Fl_Glut_StrokeFont *)fontID;
if (character < 0 || character >= font->Quantity) return 0;
schar = font->Characters[ character ];
return schar ? (int)(schar->Right + 0.5) : 0;
}
/*
* Return the width of a string drawn using a stroke font
*/
int glutStrokeLength(void* fontID, const unsigned char* string) {
unsigned char c;
float length = 0.0;
float this_line_length = 0.0;
Fl_Glut_StrokeFont* font = (Fl_Glut_StrokeFont *)fontID;
if (!string || ! *string) return 0;
while ((c = *string++) != 0) {
if (c < font->Quantity) {
if (c == '\n') {
/* EOL; reset the length of this line */
if (length < this_line_length) length = this_line_length;
this_line_length = 0.0;
} else {
/* Not an EOL, increment the length of this line */
const Fl_Glut_StrokeChar *schar = font->Characters[c];
if (schar) this_line_length += schar->Right;
}
}
}
if (length < this_line_length) length = this_line_length;
return (int)(length + 0.5);
}
/*
* Returns the height of a stroke font
*/
GLfloat glutStrokeHeight(void* fontID) {
Fl_Glut_StrokeFont* font = (Fl_Glut_StrokeFont *)fontID;
return font->Height;
}
#endif // HAVE_GL
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