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.
28 #include <GL/freeglut.h>
29 #include "freeglut_internal.h"
32 * TODO BEFORE THE STABLE RELEASE:
37 /* -- IMPORT DECLARATIONS -------------------------------------------------- */
40 * These are the font faces defined in freeglut_font_data.c file:
42 extern SFG_Font fgFontFixed8x13;
43 extern SFG_Font fgFontFixed9x15;
44 extern SFG_Font fgFontHelvetica10;
45 extern SFG_Font fgFontHelvetica12;
46 extern SFG_Font fgFontHelvetica18;
47 extern SFG_Font fgFontTimesRoman10;
48 extern SFG_Font fgFontTimesRoman24;
49 extern SFG_StrokeFont fgStrokeRoman;
50 extern SFG_StrokeFont fgStrokeMonoRoman;
53 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
56 * Matches a font ID with a SFG_Font structure pointer.
57 * This was changed to match the GLUT header style.
59 static SFG_Font* fghFontByID( void* font )
61 if( font == GLUT_BITMAP_8_BY_13 )
62 return &fgFontFixed8x13;
63 if( font == GLUT_BITMAP_9_BY_15 )
64 return &fgFontFixed9x15;
65 if( font == GLUT_BITMAP_HELVETICA_10 )
66 return &fgFontHelvetica10;
67 if( font == GLUT_BITMAP_HELVETICA_12 )
68 return &fgFontHelvetica12;
69 if( font == GLUT_BITMAP_HELVETICA_18 )
70 return &fgFontHelvetica18;
71 if( font == GLUT_BITMAP_TIMES_ROMAN_10 )
72 return &fgFontTimesRoman10;
73 if( font == GLUT_BITMAP_TIMES_ROMAN_24 )
74 return &fgFontTimesRoman24;
76 fgWarning( "font 0x%08x not found", font );
81 * Matches a font ID with a SFG_StrokeFont structure pointer.
82 * This was changed to match the GLUT header style.
84 static SFG_StrokeFont* fghStrokeByID( void* font )
86 if( font == GLUT_STROKE_ROMAN )
87 return &fgStrokeRoman;
88 if( font == GLUT_STROKE_MONO_ROMAN )
89 return &fgStrokeMonoRoman;
91 fgWarning( "stroke font 0x%08x not found", font );
96 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
99 * Draw a bitmap character
101 void FGAPIENTRY glutBitmapCharacter( void* fontID, int character )
105 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapCharacter" );
106 font = fghFontByID( fontID );
107 freeglut_return_if_fail( ( character >= 1 )&&( character < 256 ) );
108 freeglut_return_if_fail( font );
111 * Find the character we want to draw (???)
113 face = font->Characters[ character ];
115 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
116 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
117 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
118 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
119 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
120 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
121 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
123 face[ 0 ], font->Height, /* The bitmap's width and height */
124 font->xorig, font->yorig, /* The origin in the font glyph */
125 ( float )( face[ 0 ] ), 0.0, /* The raster advance -- inc. x,y */
126 ( face + 1 ) /* The packed bitmap data... */
128 glPopClientAttrib( );
131 void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
136 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapString" );
137 font = fghFontByID( fontID );
138 freeglut_return_if_fail( font );
139 if ( !string || ! *string )
142 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
143 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
144 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
145 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
146 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
147 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
148 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
151 * Step through the string, drawing each character.
152 * A newline will simply translate the next character's insertion
153 * point back to the start of the line and down one line.
155 while( ( c = *string++) )
156 if( string[c] == '\n' )
158 glBitmap ( 0, 0, 0, 0, -x, (float) -font->Height, NULL );
161 else /* Not an EOL, draw the bitmap character */
163 const GLubyte* face = font->Characters[ c ];
166 face[ 0 ], font->Height, /* Bitmap's width and height */
167 font->xorig, font->yorig, /* The origin in the font glyph */
168 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
169 ( face + 1 ) /* The packed bitmap data... */
172 x += ( float )( face[ 0 ] );
175 glPopClientAttrib( );
179 * Returns the width in pixels of a font's character
181 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
184 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapWidth" );
185 font = fghFontByID( fontID );
186 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
187 freeglut_return_val_if_fail( font, 0 );
188 return *( font->Characters[ character ] );
192 * Return the width of a string drawn using a bitmap font
194 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
197 int length = 0, this_line_length = 0;
199 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapLength" );
200 font = fghFontByID( fontID );
201 freeglut_return_val_if_fail( font, 0 );
202 if ( !string || ! *string )
205 while( ( c = *string++) )
207 if( c != '\n' )/* Not an EOL, increment length of line */
208 this_line_length += *( font->Characters[ c ]);
209 else /* EOL; reset the length of this line */
211 if( length < this_line_length )
212 length = this_line_length;
213 this_line_length = 0;
216 if ( length < this_line_length )
217 length = this_line_length;
223 * Returns the height of a bitmap font
225 int FGAPIENTRY glutBitmapHeight( void* fontID )
228 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutBitmapHeight" );
229 font = fghFontByID( fontID );
230 freeglut_return_val_if_fail( font, 0 );
235 * Draw a stroke character
237 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
239 const SFG_StrokeChar *schar;
240 const SFG_StrokeStrip *strip;
242 SFG_StrokeFont* font;
243 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeCharacter" );
244 font = fghStrokeByID( fontID );
245 freeglut_return_if_fail( character >= 0 );
246 freeglut_return_if_fail( character < font->Quantity );
247 freeglut_return_if_fail( font );
249 schar = font->Characters[ character ];
250 freeglut_return_if_fail( schar );
251 strip = schar->Strips;
253 for( i = 0; i < schar->Number; i++, strip++ )
255 glBegin( GL_LINE_STRIP );
256 for( j = 0; j < strip->Number; j++ )
257 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
260 glTranslatef( schar->Right, 0.0, 0.0 );
263 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
268 SFG_StrokeFont* font;
269 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeString" );
270 font = fghStrokeByID( fontID );
271 freeglut_return_if_fail( font );
272 if ( !string || ! *string )
276 * Step through the string, drawing each character.
277 * A newline will simply translate the next character's insertion
278 * point back to the start of the line and down one line.
280 while( ( c = *string++) )
281 if( c < font->Quantity )
285 glTranslatef ( -length, -( float )( font->Height ), 0.0 );
288 else /* Not an EOL, draw the bitmap character */
290 const SFG_StrokeChar *schar = font->Characters[ c ];
293 const SFG_StrokeStrip *strip = schar->Strips;
295 for( i = 0; i < schar->Number; i++, strip++ )
297 glBegin( GL_LINE_STRIP );
298 for( j = 0; j < strip->Number; j++ )
299 glVertex2f( strip->Vertices[ j ].X,
300 strip->Vertices[ j ].Y);
305 length += schar->Right;
306 glTranslatef( schar->Right, 0.0, 0.0 );
313 * Return the width in pixels of a stroke character
315 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
317 const SFG_StrokeChar *schar;
318 SFG_StrokeFont* font;
319 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeWidth" );
320 font = fghStrokeByID( fontID );
321 freeglut_return_val_if_fail( ( character >= 0 ) &&
322 ( character < font->Quantity ),
325 freeglut_return_val_if_fail( font, 0 );
326 schar = font->Characters[ character ];
327 freeglut_return_val_if_fail( schar, 0 );
329 return ( int )( schar->Right + 0.5 );
333 * Return the width of a string drawn using a stroke font
335 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
339 float this_line_length = 0.0;
340 SFG_StrokeFont* font;
341 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeLength" );
342 font = fghStrokeByID( fontID );
343 freeglut_return_val_if_fail( font, 0 );
344 if ( !string || ! *string )
347 while( ( c = *string++) )
348 if( c < font->Quantity )
350 if( c == '\n' ) /* EOL; reset the length of this line */
352 if( length < this_line_length )
353 length = this_line_length;
354 this_line_length = 0.0;
356 else /* Not an EOL, increment the length of this line */
358 const SFG_StrokeChar *schar = font->Characters[ c ];
360 this_line_length += schar->Right;
363 if( length < this_line_length )
364 length = this_line_length;
365 return( int )( length + 0.5 );
369 * Returns the height of a stroke font
371 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
373 SFG_StrokeFont* font;
374 FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutStrokeHeight" );
375 font = fghStrokeByID( fontID );
376 freeglut_return_val_if_fail( font, 0.0 );
380 /*** END OF FILE ***/