4 * Bitmap and stroke fonts displaying.
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Thu Dec 16 1999
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 #include <GL/freeglut.h>
33 #include "freeglut_internal.h"
36 * TODO BEFORE THE STABLE RELEASE:
41 /* -- IMPORT DECLARATIONS -------------------------------------------------- */
44 * These are the font faces defined in freeglut_font_data.c file:
46 extern SFG_Font fgFontFixed8x13;
47 extern SFG_Font fgFontFixed9x15;
48 extern SFG_Font fgFontHelvetica10;
49 extern SFG_Font fgFontHelvetica12;
50 extern SFG_Font fgFontHelvetica18;
51 extern SFG_Font fgFontTimesRoman10;
52 extern SFG_Font fgFontTimesRoman24;
53 extern SFG_StrokeFont fgStrokeRoman;
54 extern SFG_StrokeFont fgStrokeMonoRoman;
57 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
60 * Matches a font ID with a SFG_Font structure pointer.
61 * This was changed to match the GLUT header style.
63 static SFG_Font* fghFontByID( void* font )
65 if( font == GLUT_BITMAP_8_BY_13 )
66 return &fgFontFixed8x13;
67 if( font == GLUT_BITMAP_9_BY_15 )
68 return &fgFontFixed9x15;
69 if( font == GLUT_BITMAP_HELVETICA_10 )
70 return &fgFontHelvetica10;
71 if( font == GLUT_BITMAP_HELVETICA_12 )
72 return &fgFontHelvetica12;
73 if( font == GLUT_BITMAP_HELVETICA_18 )
74 return &fgFontHelvetica18;
75 if( font == GLUT_BITMAP_TIMES_ROMAN_10 )
76 return &fgFontTimesRoman10;
77 if( font == GLUT_BITMAP_TIMES_ROMAN_24 )
78 return &fgFontTimesRoman24;
80 fgWarning( "font 0x%08x not found", font );
85 * Matches a font ID with a SFG_StrokeFont structure pointer.
86 * This was changed to match the GLUT header style.
88 static SFG_StrokeFont* fghStrokeByID( void* font )
90 if( font == GLUT_STROKE_ROMAN )
91 return &fgStrokeRoman;
92 if( font == GLUT_STROKE_MONO_ROMAN )
93 return &fgStrokeMonoRoman;
95 fgWarning( "stroke font 0x%08x not found", font );
100 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
103 * Draw a bitmap character
105 void FGAPIENTRY glutBitmapCharacter( void* fontID, int character )
109 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapCharacter" );
110 font = fghFontByID( fontID );
111 freeglut_return_if_fail( ( character >= 1 )&&( character < 256 ) );
112 freeglut_return_if_fail( font );
115 * Find the character we want to draw (???)
117 face = font->Characters[ character ];
119 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
120 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
121 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
122 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
123 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
124 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
125 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
127 face[ 0 ], font->Height, /* The bitmap's width and height */
128 font->xorig, font->yorig, /* The origin in the font glyph */
129 ( float )( face[ 0 ] ), 0.0, /* The raster advance -- inc. x,y */
130 ( face + 1 ) /* The packed bitmap data... */
132 glPopClientAttrib( );
135 void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
140 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapString" );
141 font = fghFontByID( fontID );
142 freeglut_return_if_fail( font );
143 if ( !string || ! *string )
146 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
147 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
148 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
149 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
150 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
151 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
152 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
155 * Step through the string, drawing each character.
156 * A newline will simply translate the next character's insertion
157 * point back to the start of the line and down one line.
159 while( ( c = *string++) )
160 if( string[c] == '\n' )
162 glBitmap ( 0, 0, 0, 0, -x, (float) -font->Height, NULL );
165 else /* Not an EOL, draw the bitmap character */
167 const GLubyte* face = font->Characters[ c ];
170 face[ 0 ], font->Height, /* Bitmap's width and height */
171 font->xorig, font->yorig, /* The origin in the font glyph */
172 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
173 ( face + 1 ) /* The packed bitmap data... */
176 x += ( float )( face[ 0 ] );
179 glPopClientAttrib( );
183 * Returns the width in pixels of a font's character
185 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
188 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapWidth" );
189 font = fghFontByID( fontID );
190 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
191 freeglut_return_val_if_fail( font, 0 );
192 return *( font->Characters[ character ] );
196 * Return the width of a string drawn using a bitmap font
198 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
201 int length = 0, this_line_length = 0;
203 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapLength" );
204 font = fghFontByID( fontID );
205 freeglut_return_val_if_fail( font, 0 );
206 if ( !string || ! *string )
209 while( ( c = *string++) )
211 if( c != '\n' )/* Not an EOL, increment length of line */
212 this_line_length += *( font->Characters[ c ]);
213 else /* EOL; reset the length of this line */
215 if( length < this_line_length )
216 length = this_line_length;
217 this_line_length = 0;
220 if ( length < this_line_length )
221 length = this_line_length;
227 * Returns the height of a bitmap font
229 int FGAPIENTRY glutBitmapHeight( void* fontID )
232 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapHeight" );
233 font = fghFontByID( fontID );
234 freeglut_return_val_if_fail( font, 0 );
239 * Draw a stroke character
241 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
243 const SFG_StrokeChar *schar;
244 const SFG_StrokeStrip *strip;
246 SFG_StrokeFont* font;
247 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeCharacter" );
248 font = fghStrokeByID( fontID );
249 freeglut_return_if_fail( character >= 0 );
250 freeglut_return_if_fail( character < font->Quantity );
251 freeglut_return_if_fail( font );
253 schar = font->Characters[ character ];
254 freeglut_return_if_fail( schar );
255 strip = schar->Strips;
257 for( i = 0; i < schar->Number; i++, strip++ )
259 glBegin( GL_LINE_STRIP );
260 for( j = 0; j < strip->Number; j++ )
261 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
264 glTranslatef( schar->Right, 0.0, 0.0 );
267 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
272 SFG_StrokeFont* font;
273 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeString" );
274 font = fghStrokeByID( fontID );
275 freeglut_return_if_fail( font );
276 if ( !string || ! *string )
280 * Step through the string, drawing each character.
281 * A newline will simply translate the next character's insertion
282 * point back to the start of the line and down one line.
284 while( ( c = *string++) )
285 if( c < font->Quantity )
289 glTranslatef ( -length, -( float )( font->Height ), 0.0 );
292 else /* Not an EOL, draw the bitmap character */
294 const SFG_StrokeChar *schar = font->Characters[ c ];
297 const SFG_StrokeStrip *strip = schar->Strips;
299 for( i = 0; i < schar->Number; i++, strip++ )
301 glBegin( GL_LINE_STRIP );
302 for( j = 0; j < strip->Number; j++ )
303 glVertex2f( strip->Vertices[ j ].X,
304 strip->Vertices[ j ].Y);
309 length += schar->Right;
310 glTranslatef( schar->Right, 0.0, 0.0 );
317 * Return the width in pixels of a stroke character
319 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
321 const SFG_StrokeChar *schar;
322 SFG_StrokeFont* font;
323 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeWidth" );
324 font = fghStrokeByID( fontID );
325 freeglut_return_val_if_fail( ( character >= 0 ) &&
326 ( character < font->Quantity ),
329 freeglut_return_val_if_fail( font, 0 );
330 schar = font->Characters[ character ];
331 freeglut_return_val_if_fail( schar, 0 );
333 return ( int )( schar->Right + 0.5 );
337 * Return the width of a string drawn using a stroke font
339 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
343 float this_line_length = 0.0;
344 SFG_StrokeFont* font;
345 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeLength" );
346 font = fghStrokeByID( fontID );
347 freeglut_return_val_if_fail( font, 0 );
348 if ( !string || ! *string )
351 while( ( c = *string++) )
352 if( c < font->Quantity )
354 if( c == '\n' ) /* EOL; reset the length of this line */
356 if( length < this_line_length )
357 length = this_line_length;
358 this_line_length = 0.0;
360 else /* Not an EOL, increment the length of this line */
362 const SFG_StrokeChar *schar = font->Characters[ c ];
364 this_line_length += schar->Right;
367 if( length < this_line_length )
368 length = this_line_length;
369 return( int )( length + 0.5 );
373 * Returns the height of a stroke font
375 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
377 SFG_StrokeFont* font;
378 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeHeight" );
379 font = fghStrokeByID( fontID );
380 freeglut_return_val_if_fail( font, 0.0 );
384 /*** END OF FILE ***/