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 fgError( "font 0x%08x not found", font );
81 return 0; /*** NOT REACHED ***/
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 fgError( "stroke font 0x%08x not found", font );
96 return 0; /*** NOT REACHED ***/
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 ) );
113 * Find the character we want to draw (???)
115 face = font->Characters[ character ];
117 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
118 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
119 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
120 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
121 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
122 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
123 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
125 face[ 0 ], font->Height, /* The bitmap's width and height */
126 font->xorig, font->yorig, /* The origin in the font glyph */
127 ( float )( face[ 0 ] ), 0.0, /* The raster advance -- inc. x,y */
128 ( face + 1 ) /* The packed bitmap data... */
130 glPopClientAttrib( );
133 void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
136 int numchar = strlen( (char *) string );
137 SFG_Font* font = fghFontByID( fontID );
140 glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
141 glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
142 glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
143 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
144 glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
145 glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
146 glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
149 * Step through the string, drawing each character.
150 * A newline will simply translate the next character's insertion
151 * point back to the start of the line and down one line.
153 for( c = 0; c < numchar; c++ )
154 if( string[c] == '\n' )
156 glBitmap ( 0, 0, 0, 0, -x, (float) -font->Height, NULL );
159 else /* Not an EOL, draw the bitmap character */
161 const GLubyte* face = font->Characters[ string[ c ] ];
164 face[ 0 ], font->Height, /* Bitmap's width and height */
165 font->xorig, font->yorig, /* The origin in the font glyph */
166 ( float )( face[ 0 ] ), 0.0, /* The raster advance; inc. x,y */
167 ( face + 1 ) /* The packed bitmap data... */
170 x += ( float )( face[ 0 ] );
173 glPopClientAttrib( );
177 * Returns the width in pixels of a font's character
179 int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
181 SFG_Font* font = fghFontByID( fontID );
183 freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
184 return *( font->Characters[ character ] );
188 * Return the width of a string drawn using a bitmap font
190 int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
192 int c, length = 0, this_line_length = 0;
193 SFG_Font* font = fghFontByID( fontID );
194 int numchar = strlen( (char *) string );
196 for( c = 0; c < numchar; c++ )
198 if( string[ c ] != '\n' )/* Not an EOL, increment length of line */
199 this_line_length += *( font->Characters[ string[ c ] ]);
200 else /* EOL; reset the length of this line */
202 if( length < this_line_length )
203 length = this_line_length;
204 this_line_length = 0;
207 if ( length < this_line_length )
208 length = this_line_length;
214 * Returns the height of a bitmap font
216 int FGAPIENTRY glutBitmapHeight( void* fontID )
218 SFG_Font* font = fghFontByID( fontID );
223 * Draw a stroke character
225 void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
227 const SFG_StrokeChar *schar;
228 const SFG_StrokeStrip *strip;
230 SFG_StrokeFont* font = fghStrokeByID( fontID );
232 freeglut_return_if_fail( character >= 0 );
233 freeglut_return_if_fail( character < font->Quantity );
235 schar = font->Characters[ character ];
236 freeglut_return_if_fail( schar );
237 strip = schar->Strips;
239 for( i = 0; i < schar->Number; i++, strip++ )
241 glBegin( GL_LINE_STRIP );
242 for( j = 0; j < strip->Number; j++ )
243 glVertex2f( strip->Vertices[ j ].X, strip->Vertices[ j ].Y );
246 glTranslatef( schar->Right, 0.0, 0.0 );
249 void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
252 int numchar = strlen( (char *) string );
254 SFG_StrokeFont* font = fghStrokeByID( fontID );
257 * Step through the string, drawing each character.
258 * A newline will simply translate the next character's insertion
259 * point back to the start of the line and down one line.
261 for( c = 0; c < numchar; c++ )
262 if( string[ c ] < font->Quantity )
264 if( string[ c ] == '\n' )
266 glTranslatef ( -length, -( float )( font->Height ), 0.0 );
269 else /* Not an EOL, draw the bitmap character */
271 const SFG_StrokeChar *schar = font->Characters[ string[ c ] ];
274 const SFG_StrokeStrip *strip = schar->Strips;
276 for( i = 0; i < schar->Number; i++, strip++ )
278 glBegin( GL_LINE_STRIP );
279 for( j = 0; j < strip->Number; j++ )
280 glVertex2f( strip->Vertices[ j ].X,
281 strip->Vertices[ j ].Y);
286 length += schar->Right;
287 glTranslatef( schar->Right, 0.0, 0.0 );
294 * Return the width in pixels of a stroke character
296 int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
298 const SFG_StrokeChar *schar;
299 SFG_StrokeFont* font = fghStrokeByID( fontID );
301 freeglut_return_val_if_fail( ( character >= 0 ) &&
302 ( character < font->Quantity ),
305 schar = font->Characters[ character ];
306 freeglut_return_val_if_fail( schar, 0 );
308 return ( int )( schar->Right + 0.5 );
312 * Return the width of a string drawn using a stroke font
314 int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
318 float this_line_length = 0.0;
319 SFG_StrokeFont* font = fghStrokeByID( fontID );
320 int numchar = strlen( (char *) string );
322 for( c = 0; c < numchar; c++ )
323 if( string[ c ] < font->Quantity )
325 if( string[ c ] == '\n' ) /* EOL; reset the length of this line */
327 if( length < this_line_length )
328 length = this_line_length;
329 this_line_length = 0.0;
331 else /* Not an EOL, increment the length of this line */
333 const SFG_StrokeChar *schar = font->Characters[ string[ c ] ];
335 this_line_length += schar->Right;
338 if( length < this_line_length )
339 length = this_line_length;
340 return( int )( length + 0.5 );
344 * Returns the height of a stroke font
346 GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
348 SFG_StrokeFont* font = fghStrokeByID( fontID );
352 /*** END OF FILE ***/