1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2003 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@via.ecp.fr>
8 * Olivier Teulière <ipkiss@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 #include "ft2_font.hpp"
26 #include "ft2_bitmap.hpp"
27 #include "../utils/ustring.hpp"
30 #include <fribidi/fribidi.h>
34 FT2Font::FT2Font( intf_thread_t *pIntf, const string &rName, int size ):
35 GenericFont( pIntf ), m_name( rName ), m_buffer( NULL ), m_size( size ),
36 m_lib( NULL ), m_face( NULL )
43 // Clear the glyph cache
44 GlyphMap_t::iterator iter;
45 for( iter = m_glyphCache.begin(); iter != m_glyphCache.end(); ++iter )
47 FT_Done_Glyph( (*iter).second.m_glyph );
51 FT_Done_Face( m_face );
55 FT_Done_FreeType( m_lib );
65 // Initialize libfreetype
66 if( FT_Init_FreeType( &m_lib ) )
68 msg_Err( getIntf(), "failed to initialize freetype" );
73 FILE *file = fopen( m_name.c_str(), "rb" );
76 msg_Dbg( getIntf(), "loading font %s", m_name.c_str() );
80 msg_Dbg( getIntf(), "unable to open the font %s", m_name.c_str() );
84 fseek( file, 0, SEEK_END );
85 int size = ftell( file );
87 // Allocate the buffer
88 m_buffer = malloc( size );
91 msg_Err( getIntf(), "not enough memory for the font %s",
96 fread( m_buffer, size, 1, file );
99 // Load the font from the buffer
100 err = FT_New_Memory_Face( m_lib, (const FT_Byte*)m_buffer, size, 0,
102 if ( err == FT_Err_Unknown_File_Format )
104 msg_Err( getIntf(), "unsupported font format (%s)", m_name.c_str() );
109 msg_Err( getIntf(), "error opening font (%s)", m_name.c_str() );
113 // Select the charset
114 if( FT_Select_Charmap( m_face, ft_encoding_unicode ) )
116 msg_Err( getIntf(), "font has no UNICODE table (%s)", m_name.c_str() );
120 // Set the pixel size
121 if( FT_Set_Pixel_Sizes( m_face, 0, m_size ) )
123 msg_Warn( getIntf(), "cannot set a pixel size of %d (%s)", m_size,
127 // Get the font metrucs
128 m_height = m_face->size->metrics.height >> 6;
129 m_ascender = m_face->size->metrics.ascender >> 6;
130 m_descender = m_face->size->metrics.descender >> 6;
136 GenericBitmap *FT2Font::drawString( const UString &rString, uint32_t color,
142 int width1 = 0, width2 = 0;
143 int yMin = 0, yMax = 0;
144 uint32_t *pString = (uint32_t*)rString.u_str();
146 // Check if freetype has been initialized
152 // Get the length of the string
153 int len = rString.length();
155 // Use fribidi if available
157 uint32_t *pFribidiString = NULL;
160 pFribidiString = new uint32_t[len+1];
161 FriBidiCharType baseDir = FRIBIDI_TYPE_ON;
162 fribidi_log2vis( (FriBidiChar*)pString, len, &baseDir,
163 (FriBidiChar*)pFribidiString, 0, 0, 0 );
164 pString = pFribidiString;
168 // Array of glyph bitmaps and position
169 FT_BitmapGlyphRec **glyphs = new FT_BitmapGlyphRec*[len];
170 int *pos = new int[len];
172 // Does the font support kerning ?
173 FT_Bool useKerning = FT_HAS_KERNING( m_face );
176 // Index of the last glyph when the text is truncated with trailing ...
178 // Position of the first trailing dot
180 /// Get the dot glyph
181 Glyph_t &dotGlyph = getGlyph( '.' );
183 // First, render all the glyphs
184 for( n = 0; n < len; n++ )
187 // Get the glyph for this character
188 Glyph_t &glyph = getGlyph( code );
189 glyphs[n] = (FT_BitmapGlyphRec*)(glyph.m_glyph);
191 // Retrieve kerning distance and move pen position
192 if( useKerning && previous && glyph.m_index )
195 FT_Get_Kerning( m_face, previous, glyph.m_index,
196 ft_kerning_default, &delta );
197 penX += delta.x >> 6;
201 width1 = penX + glyph.m_size.xMax - glyph.m_size.xMin;
202 yMin = __MIN( yMin, glyph.m_size.yMin );
203 yMax = __MAX( yMax, glyph.m_size.yMax );
206 penX += glyph.m_advance;
209 previous = glyph.m_index;
213 // Check if the truncated text with the '...' fit in the maxWidth
218 FT_Get_Kerning( m_face, glyph.m_index, dotGlyph.m_index,
219 ft_kerning_default, &delta );
220 curX += delta.x >> 6;
222 int dotWidth = 2 * dotGlyph.m_advance +
223 dotGlyph.m_size.xMax - dotGlyph.m_size.xMin;
224 if( curX + dotWidth < maxWidth )
226 width2 = curX + dotWidth;
238 // Stop here if the text is too large
239 if( maxWidth != -1 && width1 > maxWidth )
248 delete[] pFribidiString;
252 // Adjust the size for vertical padding
253 yMax = __MAX( yMax, m_ascender );
254 yMin = __MIN( yMin, m_descender );
257 FT2Bitmap *pBmp = new FT2Bitmap( getIntf(), __MIN( width1, width2 ),
260 // Draw the glyphs on the bitmap
261 for( n = 0; n < maxIndex; n++ )
263 FT_BitmapGlyphRec *pBmpGlyph = (FT_BitmapGlyphRec*)glyphs[n];
264 // Draw the glyph on the bitmap
265 pBmp->draw( pBmpGlyph->bitmap, pos[n], yMax - pBmpGlyph->top, color );
267 // Draw the trailing dots if the text is truncated
270 int penX = firstDotX;
271 FT_BitmapGlyphRec *pBmpGlyph = (FT_BitmapGlyphRec*)dotGlyph.m_glyph;
272 for( n = 0; n < 3; n++ )
274 // Draw the glyph on the bitmap
275 pBmp->draw( pBmpGlyph->bitmap, penX, yMax - pBmpGlyph->top,
277 penX += dotGlyph.m_advance;
288 FT2Font::Glyph_t &FT2Font::getGlyph( uint32_t code ) const
290 // Try to find the glyph in the cache
291 GlyphMap_t::iterator iter = m_glyphCache.find( code );
292 if( iter != m_glyphCache.end() )
294 return (*iter).second;
298 // Add a new glyph in the cache
299 Glyph_t &glyph = m_glyphCache[code];
301 // Load and render the glyph
302 glyph.m_index = FT_Get_Char_Index( m_face, code );
303 FT_Load_Glyph( m_face, glyph.m_index, FT_LOAD_DEFAULT );
304 FT_Get_Glyph( m_face->glyph, &glyph.m_glyph );
305 FT_Glyph_Get_CBox( glyph.m_glyph, ft_glyph_bbox_pixels,
307 glyph.m_advance = m_face->glyph->advance.x >> 6;
308 FT_Glyph_To_Bitmap( &glyph.m_glyph, ft_render_mode_normal, NULL, 1 );