modules/gui/skins2/src/bitmap_font.cpp

   1 /*****************************************************************************
   2  * bitmap_font.cpp
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet     <asmax@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #include "bitmap_font.hpp"
  25 #include "generic_bitmap.hpp"
  26 #include "../utils/ustring.hpp"
  27
  28
  29 BitmapFont::BitmapFont( intf_thread_t *pIntf, const GenericBitmap &rBitmap,
  30                         const string &rType ):
  31     GenericFont( pIntf ), m_rBitmap( rBitmap )
  32 {
  33     int i;
  34
  35     // Build the character table
  36     if( rType == "digits" )
  37     {
  38         m_width = 9;
  39         m_height = 13;
  40         m_advance = 12;
  41         m_skip = 6;
  42         for( i = 0; i <= 9; i++ )
  43         {
  44             m_table['0'+i].m_xPos = i * m_width;
  45         }
  46         m_table[(size_t)' '].m_xPos = 10 * m_width;
  47         m_table[(size_t)'-'].m_xPos = 11 * m_width;
  48     }
  49     else if( rType == "text" )
  50     {
  51         m_width = 5;
  52         m_height = 6;
  53         m_advance = 5;
  54         m_skip = 5;
  55         for( i = 0; i < 26; i++ )
  56         {
  57             m_table['A'+i].m_xPos = m_table['a'+i].m_xPos = i * m_width;
  58         }
  59         m_table[(size_t)'"'].m_xPos = 26 * m_width;
  60         m_table[(size_t)'@'].m_xPos = 27 * m_width;
  61         m_table[(size_t)' '].m_xPos = 29 * m_width;
  62         for( i = 0; i <= 9; i++ )
  63         {
  64             m_table['0'+i].m_xPos = i * m_width;
  65             m_table['0'+i].m_yPos = m_height;
  66         }
  67         static const char specialChars[] = {'.', ':', '(', ')', '-', '\'',
  68             '!', '_', '+', '\\', '/', '[', ']', '^', '&', '%', ',', '=', '$',
  69             '#'};
  70         for( i = 0; i < 19; i++ )
  71         {
  72             m_table[(size_t)specialChars[i]].m_xPos = (11 + i) * m_width;
  73             m_table[(size_t)specialChars[i]].m_yPos = m_height;
  74         }
  75         m_table[(size_t)'?'].m_xPos = 4 * m_width;
  76         m_table[(size_t)'*'].m_xPos = 5 * m_width;
  77         m_table[(size_t)'?'].m_yPos = m_table[(size_t)'*'].m_yPos = 2 * m_height;
  78     }
  79 }
  80
  81
  82 GenericBitmap *BitmapFont::drawString( const UString &rString,
  83                                        uint32_t color, int maxWidth ) const
  84 {
  85     uint32_t *pString = (uint32_t*)rString.u_str();
  86     // Compute the text width
  87     int width = 0;
  88     for( uint32_t *ptr = pString; *ptr; ptr++ )
  89     {
  90         uint32_t c = *ptr;
  91         if( c < 256 && m_table[c].m_xPos != -1 )
  92         {
  93             width += m_advance;
  94         }
  95         else
  96         {
  97             width += m_skip;
  98         }
  99     }
 100     // Create a bitmap
 101     BitmapImpl *pBmp = new BitmapImpl( getIntf(), width, m_height );
 102     int xDest = 0;
 103     while( *pString )
 104     {
 105         uint32_t c = *(pString++);
 106         if( c < 256 && m_table[c].m_xPos != -1 )
 107         {
 108             bool res = pBmp->drawBitmap( m_rBitmap, m_table[c].m_xPos,
 109                                          m_table[c].m_yPos, xDest, 0,
 110                                          m_width, m_height );
 111             if ( !res )
 112                 msg_Warn( getIntf(), "BitmapFont::drawString: ignoring char" );
 113             xDest += m_advance;
 114         }
 115         else
 116         {
 117             xDest += m_skip;
 118         }
 119     }
 120     return pBmp;
 121 }
 122