1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "fx_fpf.h" 8 #if _FX_OS_ == _FX_ANDROID_ 9 #include "fpf_skiafont.h" 10 #include "fpf_skiafontmgr.h" 11 #define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a) * 1000 / em) 12 CFPF_SkiaFont::CFPF_SkiaFont() 13 : m_pFontMgr(NULL) 14 , m_pFontDes(NULL) 15 , m_Face(NULL) 16 , m_dwStyle(0) 17 , m_uCharset(0) 18 , m_dwRefCount(0) 19 { 20 } 21 CFPF_SkiaFont::~CFPF_SkiaFont() 22 { 23 if (m_Face) { 24 FXFT_Done_Face(m_Face); 25 } 26 } 27 void CFPF_SkiaFont::Release() 28 { 29 if (--m_dwRefCount == 0) { 30 delete this; 31 } 32 } 33 IFPF_Font* CFPF_SkiaFont::Retain() 34 { 35 m_dwRefCount++; 36 return (IFPF_Font*)this; 37 } 38 FPF_HFONT CFPF_SkiaFont::GetHandle() 39 { 40 return NULL; 41 } 42 CFX_ByteString CFPF_SkiaFont::GetFamilyName() 43 { 44 if (!m_Face) { 45 return CFX_ByteString(); 46 } 47 return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face)); 48 } 49 CFX_WideString CFPF_SkiaFont::GetPsName() 50 { 51 if (!m_Face) { 52 return CFX_WideString(); 53 } 54 return CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(m_Face)); 55 } 56 FX_INT32 CFPF_SkiaFont::GetGlyphIndex(FX_WCHAR wUnicode) 57 { 58 if (!m_Face) { 59 return wUnicode; 60 } 61 if (FXFT_Select_Charmap(m_Face, FXFT_ENCODING_UNICODE)) { 62 return 0; 63 } 64 return FXFT_Get_Char_Index(m_Face, wUnicode); 65 } 66 FX_INT32 CFPF_SkiaFont::GetGlyphWidth(FX_INT32 iGlyphIndex) 67 { 68 if (!m_Face) { 69 return 0; 70 } 71 if (FXFT_Load_Glyph(m_Face, iGlyphIndex, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { 72 return 0; 73 } 74 return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriAdvance(m_Face)); 75 } 76 FX_INT32 CFPF_SkiaFont::GetAscent() const 77 { 78 if (!m_Face) { 79 return 0; 80 } 81 return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Ascender(m_Face)); 82 } 83 FX_INT32 CFPF_SkiaFont::GetDescent() const 84 { 85 if (!m_Face) { 86 return 0; 87 } 88 return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Descender(m_Face)); 89 } 90 FX_BOOL CFPF_SkiaFont::GetGlyphBBox(FX_INT32 iGlyphIndex, FX_RECT &rtBBox) 91 { 92 if (!m_Face) { 93 return FALSE; 94 } 95 if (FXFT_Is_Face_Tricky(m_Face)) { 96 if (FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72)) { 97 return FALSE; 98 } 99 if (FXFT_Load_Glyph(m_Face, iGlyphIndex, FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { 100 FXFT_Set_Pixel_Sizes(m_Face, 0, 64); 101 return FALSE; 102 } 103 FXFT_Glyph glyph; 104 if (FXFT_Get_Glyph(m_Face->glyph, &glyph)) { 105 FXFT_Set_Pixel_Sizes(m_Face, 0, 64); 106 return FALSE; 107 } 108 FXFT_BBox cbox; 109 FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); 110 FX_INT32 x_ppem = m_Face->size->metrics.x_ppem; 111 FX_INT32 y_ppem = m_Face->size->metrics.y_ppem; 112 rtBBox.left = FPF_EM_ADJUST(x_ppem, cbox.xMin); 113 rtBBox.right = FPF_EM_ADJUST(x_ppem, cbox.xMax); 114 rtBBox.top = FPF_EM_ADJUST(y_ppem, cbox.yMax); 115 rtBBox.bottom = FPF_EM_ADJUST(y_ppem, cbox.yMin); 116 rtBBox.top = FX_MIN(rtBBox.top, GetAscent()); 117 rtBBox.bottom = FX_MAX(rtBBox.bottom, GetDescent()); 118 FXFT_Done_Glyph(glyph); 119 return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0; 120 } 121 if (FXFT_Load_Glyph(m_Face, iGlyphIndex, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { 122 return FALSE; 123 } 124 rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriBearingX(m_Face)); 125 rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriBearingY(m_Face)); 126 rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face)); 127 rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face)); 128 return TRUE; 129 } 130 FX_BOOL CFPF_SkiaFont::GetBBox(FX_RECT &rtBBox) 131 { 132 if (!m_Face) { 133 return FALSE; 134 } 135 rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_xMin(m_Face)); 136 rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_yMin(m_Face)); 137 rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_xMax(m_Face)); 138 rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_yMax(m_Face)); 139 return TRUE; 140 } 141 FX_INT32 CFPF_SkiaFont::GetHeight() const 142 { 143 if (!m_Face) { 144 return 0; 145 } 146 return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Height(m_Face)); 147 } 148 FX_INT32 CFPF_SkiaFont::GetItalicAngle() const 149 { 150 if (!m_Face) { 151 return 0; 152 } 153 TT_Postscript *ttInfo = (TT_Postscript*)FT_Get_Sfnt_Table(m_Face, ft_sfnt_post); 154 if (ttInfo) { 155 return ttInfo->italicAngle; 156 } 157 return 0; 158 } 159 FX_DWORD CFPF_SkiaFont::GetFontData(FX_DWORD dwTable, FX_LPBYTE pBuffer, FX_DWORD dwSize) 160 { 161 if (!m_Face) { 162 return FALSE; 163 } 164 if (FXFT_Load_Sfnt_Table(m_Face, dwTable, 0, pBuffer, (unsigned long*)&dwSize)) { 165 return 0; 166 } 167 return dwSize; 168 } 169 FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr *pFontMgr, CFPF_SkiaFontDescriptor *pFontDes, FX_BSTR bsFamily, FX_DWORD dwStyle, FX_BYTE uCharset) 170 { 171 if (!pFontMgr || !pFontDes) { 172 return FALSE; 173 } 174 switch (pFontDes->GetType()) { 175 case FPF_SKIAFONTTYPE_Path: { 176 CFPF_SkiaPathFont *pFont = (CFPF_SkiaPathFont*)pFontDes; 177 m_Face = pFontMgr->GetFontFace(pFont->m_pPath, pFont->m_iFaceIndex); 178 } 179 break; 180 case FPF_SKIAFONTTYPE_File: { 181 CFPF_SkiaFileFont *pFont = (CFPF_SkiaFileFont*)pFontDes; 182 m_Face = pFontMgr->GetFontFace(pFont->m_pFile, pFont->m_iFaceIndex); 183 } 184 break; 185 case FPF_SKIAFONTTYPE_Buffer: { 186 CFPF_SkiaBufferFont *pFont = (CFPF_SkiaBufferFont*)pFontDes; 187 m_Face = pFontMgr->GetFontFace((FX_LPCBYTE)pFont->m_pBuffer, pFont->m_szBuffer, pFont->m_iFaceIndex); 188 } 189 break; 190 default: 191 return FALSE; 192 } 193 if (!m_Face) { 194 return FALSE; 195 } 196 m_dwStyle = dwStyle; 197 m_uCharset = uCharset; 198 m_pFontMgr = pFontMgr; 199 m_pFontDes = pFontDes; 200 m_dwRefCount = 1; 201 return TRUE; 202 } 203 #endif 204
