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/* Copyright (c) Mark J. Kilgard, 1994, 1998.
This program is freely distributable without licensing fees
and is provided without guarantee or warrantee expressed or
implied. This program is -not- in the public domain. */
#include "internal.h"
#include "font.h"
#if defined(_WIN32) || defined (GLUT_IMPORT_LIB)
static inline void*
__glutFont( void *font )
{
switch((long)font) {
case (long)GLUT_STROKE_ROMAN:
return &glutStrokeRoman;
case (long)GLUT_STROKE_MONO_ROMAN:
return &glutStrokeMonoRoman;
case (long)GLUT_BITMAP_9_BY_15:
return &glutBitmap9By15;
case (long)GLUT_BITMAP_8_BY_13:
return &glutBitmap8By13;
case (long)GLUT_BITMAP_TIMES_ROMAN_10:
return &glutBitmapTimesRoman10;
case (long)GLUT_BITMAP_TIMES_ROMAN_24:
return &glutBitmapTimesRoman24;
case (long)GLUT_BITMAP_HELVETICA_10:
return &glutBitmapHelvetica10;
case (long)GLUT_BITMAP_HELVETICA_12:
return &glutBitmapHelvetica12;
case (long)GLUT_BITMAP_HELVETICA_18:
return &glutBitmapHelvetica18;
}
return NULL;
}
#else
static inline void*
__glutFont( void *font )
{
return font;
}
#endif
void GLUTAPIENTRY
glutBitmapCharacter( GLUTbitmapFont font, int c )
{
const BitmapCharRec *ch;
BitmapFontPtr fontinfo;
GLint swapbytes, lsbfirst, rowlength;
GLint skiprows, skippixels, alignment;
fontinfo = (BitmapFontPtr) __glutFont( font );
if (!fontinfo || c < fontinfo->first ||
c >= fontinfo->first + fontinfo->num_chars)
return;
ch = fontinfo->ch[c - fontinfo->first];
if (ch) {
/* Save current modes. */
glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapbytes);
glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbfirst);
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowlength);
glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skiprows);
glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skippixels);
glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);
/* Little endian machines (DEC Alpha for example) could
benefit from setting GL_UNPACK_LSB_FIRST to GL_TRUE
instead of GL_FALSE, but this would require changing the
generated bitmaps too. */
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glBitmap(ch->width, ch->height, ch->xorig, ch->yorig,
ch->advance, 0, ch->bitmap);
/* Restore saved modes. */
glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes);
glPixelStorei(GL_UNPACK_LSB_FIRST, lsbfirst);
glPixelStorei(GL_UNPACK_ROW_LENGTH, rowlength);
glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels);
glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
}
}
int GLUTAPIENTRY
glutBitmapWidth( GLUTbitmapFont font, int c )
{
BitmapFontPtr fontinfo;
const BitmapCharRec *ch;
fontinfo = (BitmapFontPtr) __glutFont( font );
if (!fontinfo || c < fontinfo->first ||
c >= fontinfo->first + fontinfo->num_chars)
return 0;
ch = fontinfo->ch[c - fontinfo->first];
if (ch)
return ch->advance;
return 0;
}
int GLUTAPIENTRY
glutBitmapLength( GLUTbitmapFont font, const unsigned char *string )
{
int c, length;
BitmapFontPtr fontinfo;
const BitmapCharRec *ch;
fontinfo = (BitmapFontPtr) __glutFont( font );
if (!fontinfo)
return 0;
for (length = 0; *string != '\0'; string++) {
c = *string;
if (c >= fontinfo->first &&
c < fontinfo->first + fontinfo->num_chars) {
ch = fontinfo->ch[c - fontinfo->first];
if (ch)
length += ch->advance;
}
}
return length;
}
void GLUTAPIENTRY
glutStrokeCharacter( GLUTstrokeFont font, int c )
{
const StrokeCharRec *ch;
const StrokeRec *stroke;
const CoordRec *coord;
StrokeFontPtr fontinfo;
int i, j;
fontinfo = (StrokeFontPtr) __glutFont( font );
if (!fontinfo || c < 0 || c >= fontinfo->num_chars)
return;
ch = &(fontinfo->ch[c]);
if (ch) {
for (i = ch->num_strokes, stroke = ch->stroke;
i > 0; i--, stroke++) {
glBegin(GL_LINE_STRIP);
for (j = stroke->num_coords, coord = stroke->coord;
j > 0; j--, coord++) {
glVertex2f(coord->x, coord->y);
}
glEnd();
}
glTranslatef(ch->right, 0.0, 0.0);
}
}
int GLUTAPIENTRY
glutStrokeWidth( GLUTstrokeFont font, int c )
{
StrokeFontPtr fontinfo;
const StrokeCharRec *ch;
fontinfo = (StrokeFontPtr) __glutFont( font );
if (!fontinfo || c < 0 || c >= fontinfo->num_chars)
return 0;
ch = &(fontinfo->ch[c]);
if (ch)
return ch->right;
return 0;
}
int GLUTAPIENTRY
glutStrokeLength( GLUTstrokeFont font, const unsigned char *string )
{
int c, length;
StrokeFontPtr fontinfo;
const StrokeCharRec *ch;
fontinfo = (StrokeFontPtr) __glutFont( font );
if (!fontinfo)
return 0;
for (length = 0; *string != '\0'; string++) {
c = *string;
if (c >= 0 && c < fontinfo->num_chars) {
ch = &(fontinfo->ch[c]);
if (ch)
length += ch->right;
}
}
return length;
}
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