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 )
108 SFG_Font* font = fghFontByID( fontID );
110 freeglut_return_if_fail( ( character >= 1 )&&( character < 256 ) );
111 freeglut_return_if_fail( font );
114 * Find the character we want to draw (???)
116 face = font->Characters[ character ];
118 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
119 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
120 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
121 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
122 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
123 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
124 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
126 face[ 0 ], font->Height, /* The bitmap's width and height */
127 font->xorig, font->yorig, /* The origin in the font glyph */
128 ( float )( face[ 0 ] ), 0.0, /* The raster advance -- inc. x,y */
129 ( face + 1 ) /* The packed bitmap data... */
131 glPopClientAttrib( );
134 void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
137 SFG_Font* font = fghFontByID( fontID );
140 freeglut_return_if_fail( font );
141 if ( !string || ! *string )
144 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
145 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
146 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
147 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
148 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
149 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
150 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
153 * Step through the string, drawing each character.
154 * A newline will simply translate the next character's insertion
155 * point back to the start of the line and down one line.
157 while( c = *string++ )
158 if( string[c] == '\n' )
160 glBitmap ( 0, 0, 0, 0, -x, (float) -font->Height, NULL );
163 else /* Not an EOL, draw the bitmap character */
165 const GLubyte* face = font->Characters[ c ];
168 face[ 0 ], font->Height, /* Bitmap's width and height */
169 font->xorig, font->yorig, /* The origin in the font glyph */
170 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
171 ( face + 1 ) /* The packed bitmap data... */
174 x += ( float )( face[ 0 ] );
177 glPopClientAttrib( );
181 * Returns the width in pixels of a font's character
183 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
185 SFG_Font* font = fghFontByID( fontID );
187 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
188 freeglut_return_val_if_fail( font, 0 );
189 return *( font->Characters[ character ] );
193 * Return the width of a string drawn using a bitmap font
195 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
198 int length = 0, this_line_length = 0;
199 SFG_Font* 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 )
227 SFG_Font* font = fghFontByID( fontID );
228 freeglut_return_val_if_fail( font, 0 );
233 * Draw a stroke character
235 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
237 const SFG_StrokeChar *schar;
238 const SFG_StrokeStrip *strip;
240 SFG_StrokeFont* font = fghStrokeByID( fontID );
242 freeglut_return_if_fail( character >= 0 );
243 freeglut_return_if_fail( character < font->Quantity );
244 freeglut_return_if_fail( font );
246 schar = font->Characters[ character ];
247 freeglut_return_if_fail( schar );
248 strip = schar->Strips;
250 for( i = 0; i < schar->Number; i++, strip++ )
252 glBegin( GL_LINE_STRIP );
253 for( j = 0; j < strip->Number; j++ )
254 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
257 glTranslatef( schar->Right, 0.0, 0.0 );
260 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
265 SFG_StrokeFont* font = fghStrokeByID( fontID );
267 freeglut_return_if_fail( font );
268 if ( !string || ! *string )
272 * Step through the string, drawing each character.
273 * A newline will simply translate the next character's insertion
274 * point back to the start of the line and down one line.
276 while( c = *string++ )
277 if( c < font->Quantity )
281 glTranslatef ( -length, -( float )( font->Height ), 0.0 );
284 else /* Not an EOL, draw the bitmap character */
286 const SFG_StrokeChar *schar = font->Characters[ c ];
289 const SFG_StrokeStrip *strip = schar->Strips;
291 for( i = 0; i < schar->Number; i++, strip++ )
293 glBegin( GL_LINE_STRIP );
294 for( j = 0; j < strip->Number; j++ )
295 glVertex2f( strip->Vertices[ j ].X,
296 strip->Vertices[ j ].Y);
301 length += schar->Right;
302 glTranslatef( schar->Right, 0.0, 0.0 );
309 * Return the width in pixels of a stroke character
311 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
313 const SFG_StrokeChar *schar;
314 SFG_StrokeFont* font = fghStrokeByID( fontID );
316 freeglut_return_val_if_fail( ( character >= 0 ) &&
317 ( character < font->Quantity ),
320 freeglut_return_val_if_fail( font, 0 );
321 schar = font->Characters[ character ];
322 freeglut_return_val_if_fail( schar, 0 );
324 return ( int )( schar->Right + 0.5 );
328 * Return the width of a string drawn using a stroke font
330 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
334 float this_line_length = 0.0;
335 SFG_StrokeFont* font = fghStrokeByID( fontID );
337 freeglut_return_val_if_fail( font, 0 );
338 if ( !string || ! *string )
341 while( c = *string++ )
342 if( c < font->Quantity )
344 if( c == '\n' ) /* EOL; reset the length of this line */
346 if( length < this_line_length )
347 length = this_line_length;
348 this_line_length = 0.0;
350 else /* Not an EOL, increment the length of this line */
352 const SFG_StrokeChar *schar = font->Characters[ c ];
354 this_line_length += schar->Right;
357 if( length < this_line_length )
358 length = this_line_length;
359 return( int )( length + 0.5 );
363 * Returns the height of a stroke font
365 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
367 SFG_StrokeFont* font = fghStrokeByID( fontID );
368 freeglut_return_val_if_fail( font, 0.0 );
372 /*** END OF FILE ***/