00001 #include "SdlArs.h"
00002
00003 namespace Ars
00004 {
00005
00006 FT_Library FontEngine::m_FTLibrary;
00007 bool FontEngine::m_bFTLibraryLoaded = false;
00008
00009
00010 FontEngine::FontEngine(const std::string& sFontFileName, unsigned char FontSize)
00011 : fontSize( FontSize ) , fontFilename( sFontFileName )
00012 {
00013 if (!m_bFTLibraryLoaded)
00014 {
00015 if (FT_Init_FreeType(&m_FTLibrary))
00016 tron << "FontEngine::FontEngine : Unable to initialize FreeType library.\n";
00017 m_bFTLibraryLoaded = true;
00018 }
00019 if (FT_New_Face(m_FTLibrary, sFontFileName.c_str(), 0, &m_FontFace))
00020 tron << "FontEngine::FontEngine : Unable to create font face.";
00021 if (FT_Set_Char_Size(m_FontFace, 0, FontSize * 64, 0, 0))
00022 tron << "FontEngine::FontEngine : Unable to set character size.\n";
00023 }
00024
00025
00026 FontEngine::~FontEngine(void)
00027 {
00028 FT_Done_Face(m_FontFace);
00029 }
00030
00031 FT_BitmapGlyphRec* FontEngine::RenderGlyph( const char Char )
00032 {
00033 std::map<char, FT_BitmapGlyphRec>::iterator glyphIter = m_CachedGlyphMap.find(Char);
00034 if (glyphIter == m_CachedGlyphMap.end())
00035 {
00036 if( FT_Load_Char(m_FontFace, Char, FT_LOAD_DEFAULT) == 0 )
00037 {
00038 FT_Glyph glyph;
00039 if( FT_Get_Glyph(m_FontFace->glyph, &glyph) == 0 && FT_Glyph_To_Bitmap(&glyph, ft_render_mode_normal, 0, 1) == 0 )
00040 {
00041 glyphIter = m_CachedGlyphMap.insert(std::make_pair(Char, *reinterpret_cast<FT_BitmapGlyph>(glyph))).first;
00042 return &(glyphIter->second);
00043 }
00044 }
00045 }
00046 return &(glyphIter->second);
00047 }
00048
00049 FT_Glyph_Metrics* FontEngine::GetMetrics( const char Char )
00050 {
00051 std::map<char, FT_Glyph_Metrics>::iterator glyphIter = m_CachedMetricsMap.find(Char);
00052 if (glyphIter == m_CachedMetricsMap.end())
00053 {
00054 if(FT_Load_Char(m_FontFace, Char, FT_LOAD_DEFAULT) == 0 )
00055 {
00056 glyphIter = m_CachedMetricsMap.insert(std::make_pair(Char, m_FontFace->glyph->metrics)).first;
00057 return &(glyphIter->second);
00058 }
00059 }
00060 return &(glyphIter->second);
00061 }
00062
00063 }
