bitmap_font.cpp
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:4k
- /*****************************************************************************
- * bitmap_font.cpp
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: bitmap_font.cpp 7261 2004-04-03 13:57:46Z asmax $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include "bitmap_font.hpp"
- #include "generic_bitmap.hpp"
- #include "../utils/ustring.hpp"
- BitmapFont::BitmapFont( intf_thread_t *pIntf, const GenericBitmap &rBitmap,
- const string &rType ):
- GenericFont( pIntf ), m_rBitmap( rBitmap )
- {
- // Build the character table
- if( rType == "digits" )
- {
- m_width = 9;
- m_height = 13;
- m_advance = 12;
- m_skip = 6;
- for( int i = 0; i <= 9; i++ )
- {
- m_table['0'+i].m_xPos = i * m_width;
- }
- m_table[(size_t)'-'].m_xPos = 11 * m_width;
- }
- else if( rType == "text" )
- {
- m_width = 5;
- m_height = 6;
- m_advance = 5;
- m_skip = 5;
- for( int i = 0; i < 26; i++ )
- {
- m_table['A'+i].m_xPos = m_table['a'+i].m_xPos = i * m_width;
- }
- m_table[(size_t)'"'].m_xPos = 26 * m_width;
- m_table[(size_t)'@'].m_xPos = 27 * m_width;
- m_table[(size_t)' '].m_xPos = 29 * m_width;
- for( int i = 0; i <= 9; i++ )
- {
- m_table['0'+i].m_xPos = i * m_width;
- m_table['0'+i].m_yPos = m_height;
- }
- static const char specialChars[] = {'.', ':', '(', ')', '-', ''',
- '!', '_', '+', '\', '/', '[', ']', '^', '&', '%', ',', '=', '$',
- '#'};
- for( int i = 0; i < 19; i++ )
- {
- m_table[(size_t)specialChars[i]].m_xPos = (11 + i) * m_width;
- m_table[(size_t)specialChars[i]].m_yPos = m_height;
- }
- m_table[(size_t)'?'].m_xPos = 4 * m_width;
- m_table[(size_t)'*'].m_xPos = 5 * m_width;
- m_table[(size_t)'?'].m_yPos = m_table[(size_t)'*'].m_yPos = 2 * m_height;
- }
- }
- GenericBitmap *BitmapFont::drawString( const UString &rString,
- uint32_t color, int maxWidth ) const
- {
- uint32_t *pString = (uint32_t*)rString.u_str();
- // Compute the text width
- int width = 0;
- for( uint32_t *ptr = pString; *ptr; ptr++ )
- {
- uint32_t c = *ptr;
- if( c < 256 && m_table[c].m_xPos != -1 )
- {
- width += m_advance;
- }
- else
- {
- width += m_skip;
- }
- }
- // Create a bitmap
- BitmapImpl *pBmp = new BitmapImpl( getIntf(), width, m_height );
- int xDest = 0;
- while( *pString )
- {
- uint32_t c = *(pString++);
- if( c < 256 && m_table[c].m_xPos != -1 )
- {
- pBmp->drawBitmap( m_rBitmap, m_table[c].m_xPos, m_table[c].m_yPos,
- xDest, 0, m_width, m_height );
- xDest += m_advance;
- }
- else
- {
- xDest += m_skip;
- }
- }
- return pBmp;
- }