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 "../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 )
66 * XXX Use a macro, a table of some kind, or else split these
67 * XXX statements properly. Jamming "return" on the end of an
68 * XXX "if" is just bad style, IMHO.
70 if( font == GLUT_BITMAP_8_BY_13 ) return( &fgFontFixed8x13 );
71 if( font == GLUT_BITMAP_9_BY_15 ) return( &fgFontFixed9x15 );
72 if( font == GLUT_BITMAP_HELVETICA_10 ) return( &fgFontHelvetica10 );
73 if( font == GLUT_BITMAP_HELVETICA_12 ) return( &fgFontHelvetica12 );
74 if( font == GLUT_BITMAP_HELVETICA_18 ) return( &fgFontHelvetica18 );
75 if( font == GLUT_BITMAP_TIMES_ROMAN_10 ) return( &fgFontTimesRoman10 );
76 if( font == GLUT_BITMAP_TIMES_ROMAN_24 ) return( &fgFontTimesRoman24 );
77 fgError( "font 0x%08x not found", font );
78 return 0; /*** NOT REACHED ***/
82 * Matches a font ID with a SFG_StrokeFont structure pointer.
83 * This was changed to match the GLUT header style.
85 static SFG_StrokeFont* fghStrokeByID( void* font )
88 * XXX Same comment as above about jamming "return" in after an
91 if( font == GLUT_STROKE_ROMAN ) return( &fgStrokeRoman );
92 if( font == GLUT_STROKE_MONO_ROMAN ) return( &fgStrokeMonoRoman );
93 fgError( "stroke font 0x%08x not found", font );
94 return 0; /*** NOT REACHED ***/
98 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
101 * Draw a bitmap character
103 void FGAPIENTRY glutBitmapCharacter( void* fontID, int character )
106 SFG_Font* font = fghFontByID( fontID );
108 freeglut_return_if_fail( ( character >= 1 )&&( character < 256 ) );
111 * Find the character we want to draw (???)
113 face = font->Characters[ character - 1 ];
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 )
134 int numchar = strlen ( string ) ;
135 SFG_Font* font = fghFontByID( fontID );
136 float raster_position[4];
138 glGetFloatv ( GL_CURRENT_RASTER_POSITION, raster_position ) ;
139 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
140 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
141 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
142 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
143 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
144 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
145 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
148 * Step through the string, drawing each character.
149 * A newline will simply translate the next character's insertion
150 * point back to the start of the line and down one line.
152 for( c = 0; c < numchar; c++ )
153 if ( string[c] == '\n' )
155 raster_position[1] -= (float)font->Height ;
156 glRasterPos4fv ( raster_position ) ;
158 else /* Not an EOL, draw the bitmap character */
160 const GLubyte* face = font->Characters[ string[ c ] - 1 ];
163 face[ 0 ], font->Height, /* Bitmap's width and height */
164 font->xorig, font->yorig, /* The origin in the font glyph */
165 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
166 ( face + 1 ) /* The packed bitmap data... */
169 glPopClientAttrib( );
173 * Returns the width in pixels of a font's character
175 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
177 SFG_Font* font = fghFontByID( fontID );
179 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
180 return *( font->Characters[ character - 1 ] );
184 * Return the width of a string drawn using a bitmap font
186 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
188 int c, length = 0, this_line_length = 0;
189 SFG_Font* font = fghFontByID( fontID );
190 int numchar = strlen ( string ) ;
192 for( c = 0; c < numchar; c++ )
194 if ( string[ c ] != '\n' )/* Not an EOL, increment length of line */
195 this_line_length += *( font->Characters[ string[ c ] - 1 ]);
196 else /* EOL; reset the length of this line */
198 if( length < this_line_length )
199 length = this_line_length;
200 this_line_length = 0;
203 if ( length < this_line_length )
204 length = this_line_length;
210 * Returns the height of a bitmap font
212 int FGAPIENTRY glutBitmapHeight( void* fontID )
214 SFG_Font* font = fghFontByID( fontID );
219 * Draw a stroke character
221 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
223 const SFG_StrokeChar *schar;
224 const SFG_StrokeStrip *strip;
226 SFG_StrokeFont* font = fghStrokeByID( fontID );
228 freeglut_return_if_fail( character >= 0 && character < font->Quantity );
230 schar = font->Characters[character];
231 freeglut_return_if_fail( schar );
232 strip = schar->Strips;
234 for( i = 0; i < schar->Number; i++, strip++ )
236 glBegin( GL_LINE_STRIP );
237 for( j = 0; j < strip->Number; j++ )
238 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
241 glTranslatef( schar->Right, 0.0, 0.0 );
244 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
247 int numchar = strlen ( string );
249 SFG_StrokeFont* font = fghStrokeByID( fontID );
252 * Step through the string, drawing each character.
253 * A newline will simply translate the next character's insertion
254 * point back to the start of the line and down one line.
256 for( c = 0; c < numchar; c++ )
257 if ( string[ c ] < font->Quantity )
259 if( string[ c ] == '\n' )
261 glTranslatef ( -length, -(float)(font->Height), 0.0 );
264 else /* Not an EOL, draw the bitmap character */
266 const SFG_StrokeChar *schar = font->Characters[ string[ c ] ];
269 const SFG_StrokeStrip *strip = schar->Strips;
271 for(i = 0; i < schar->Number; i++, strip++)
273 glBegin( GL_LINE_STRIP );
274 for( j = 0; j < strip->Number; j++ )
275 glVertex2f( strip->Vertices[ j ].X,
276 strip->Vertices[ j ].Y);
281 length += schar->Right;
282 glTranslatef( schar->Right, 0.0, 0.0 );
289 * Return the width in pixels of a stroke character
291 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
293 const SFG_StrokeChar *schar;
294 SFG_StrokeFont* font = fghStrokeByID( fontID );
296 freeglut_return_val_if_fail( ( character >= 0 ) &&
297 ( character < font->Quantity ),
299 schar = font->Characters[ character ];
300 freeglut_return_val_if_fail( schar, 0 );
302 return ( int )( schar->Right + 0.5 );
306 * Return the width of a string drawn using a stroke font
308 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
312 float this_line_length = 0.0;
313 SFG_StrokeFont* font = fghStrokeByID( fontID );
314 int numchar = strlen( string );
316 for( c = 0; c < numchar; c++ )
317 if ( string[ c ] < font->Quantity )
319 if( string[ c ] == '\n' ) /* EOL; reset the length of this line */
321 if( length < this_line_length )
322 length = this_line_length;
323 this_line_length = 0.0;
325 else /* Not an EOL, increment the length of this line */
327 const SFG_StrokeChar *schar = font->Characters[ string[ c ] ];
329 this_line_length += schar->Right;
332 if( length < this_line_length )
333 length = this_line_length;
334 return ( int )( length + 0.5 );
338 * Returns the height of a stroke font
340 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
342 SFG_StrokeFont* font = fghStrokeByID( fontID );
343 return( font->Height );
346 /*** END OF FILE ***/