00001 #include "FTFace.h"
00002 #include "FTLibrary.h"
00003
00004 #include FT_TRUETYPE_TABLES_H
00005
00006 FTFace::FTFace( const char* filename)
00007 : numGlyphs(0),
00008 err(0)
00009 {
00010 const FT_Long DEFAULT_FACE_INDEX = 0;
00011 ftFace = new FT_Face;
00012
00013 err = FT_New_Face( *FTLibrary::Instance().GetLibrary(), filename, DEFAULT_FACE_INDEX, ftFace);
00014
00015 if( err)
00016 {
00017 delete ftFace;
00018 ftFace = 0;
00019 }
00020 else
00021 {
00022 numGlyphs = (*ftFace)->num_glyphs;
00023 }
00024 }
00025
00026
00027 FTFace::FTFace( const unsigned char *pBufferBytes, size_t bufferSizeInBytes)
00028 : numGlyphs(0),
00029 err(0)
00030 {
00031 const FT_Long DEFAULT_FACE_INDEX = 0;
00032 ftFace = new FT_Face;
00033
00034 err = FT_New_Memory_Face( *FTLibrary::Instance().GetLibrary(), (FT_Byte *)pBufferBytes, bufferSizeInBytes, DEFAULT_FACE_INDEX, ftFace);
00035
00036 if( err)
00037 {
00038 delete ftFace;
00039 ftFace = 0;
00040 }
00041 else
00042 {
00043 numGlyphs = (*ftFace)->num_glyphs;
00044 }
00045 }
00046
00047
00048 FTFace::~FTFace()
00049 {
00050 Close();
00051 }
00052
00053
00054 bool FTFace::Attach( const char* filename)
00055 {
00056 err = FT_Attach_File( *ftFace, filename);
00057 return !err;
00058 }
00059
00060
00061 bool FTFace::Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes)
00062 {
00063 FT_Open_Args open;
00064
00065 open.flags = (FT_Open_Flags)1;
00066 open.memory_base = (FT_Byte *)pBufferBytes;
00067 open.memory_size = bufferSizeInBytes;
00068
00069 err = FT_Attach_Stream( *ftFace, &open);
00070 return !err;
00071 }
00072
00073
00074 void FTFace::Close()
00075 {
00076 if( ftFace)
00077 {
00078 FT_Done_Face( *ftFace);
00079 delete ftFace;
00080 ftFace = 0;
00081 }
00082 }
00083
00084
00085 const FTSize& FTFace::Size( const unsigned int size, const unsigned int res)
00086 {
00087 charSize.CharSize( ftFace, size, res, res);
00088 err = charSize.Error();
00089
00090 return charSize;
00091 }
00092
00093
00094 unsigned int FTFace::UnitsPerEM() const
00095 {
00096 return (*ftFace)->units_per_EM;
00097 }
00098
00099
00100 FTPoint FTFace::KernAdvance( unsigned int index1, unsigned int index2)
00101 {
00102 float x, y;
00103 x = y = 0.0f;
00104
00105 if( FT_HAS_KERNING((*ftFace)) && index1 && index2)
00106 {
00107 FT_Vector kernAdvance;
00108 kernAdvance.x = kernAdvance.y = 0;
00109
00110 err = FT_Get_Kerning( *ftFace, index1, index2, ft_kerning_unfitted, &kernAdvance);
00111 if( !err)
00112 {
00113 x = static_cast<float>( kernAdvance.x) / 64.0f;
00114 y = static_cast<float>( kernAdvance.y) / 64.0f;
00115 }
00116 }
00117
00118 return FTPoint( x, y, 0.0);
00119 }
00120
00121
00122 FT_Glyph* FTFace::Glyph( unsigned int index, FT_Int load_flags)
00123 {
00124 err = FT_Load_Glyph( *ftFace, index, load_flags);
00125 if( err)
00126 {
00127 return NULL;
00128 }
00129
00130 err = FT_Get_Glyph( (*ftFace)->glyph, &ftGlyph);
00131 if( err)
00132 {
00133 return NULL;
00134 }
00135
00136 return &ftGlyph;
00137 }
00138