| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fxcrt/include/fx_system.h" |
| |
| #if _FX_OS_ == _FX_ANDROID_ |
| |
| #include <algorithm> |
| |
| #include "core/fxge/android/fpf_skiafont.h" |
| #include "core/fxge/android/fpf_skiafontmgr.h" |
| #include "core/include/fxge/fx_freetype.h" |
| |
| #define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em) |
| |
| CFPF_SkiaFont::CFPF_SkiaFont() |
| : m_pFontMgr(NULL), |
| m_pFontDes(NULL), |
| m_Face(NULL), |
| m_dwStyle(0), |
| m_uCharset(0), |
| m_dwRefCount(0) {} |
| CFPF_SkiaFont::~CFPF_SkiaFont() { |
| if (m_Face) { |
| FXFT_Done_Face(m_Face); |
| } |
| } |
| void CFPF_SkiaFont::Release() { |
| if (--m_dwRefCount == 0) { |
| delete this; |
| } |
| } |
| IFPF_Font* CFPF_SkiaFont::Retain() { |
| m_dwRefCount++; |
| return (IFPF_Font*)this; |
| } |
| FPF_HFONT CFPF_SkiaFont::GetHandle() { |
| return NULL; |
| } |
| CFX_ByteString CFPF_SkiaFont::GetFamilyName() { |
| if (!m_Face) { |
| return CFX_ByteString(); |
| } |
| return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face)); |
| } |
| CFX_WideString CFPF_SkiaFont::GetPsName() { |
| if (!m_Face) { |
| return CFX_WideString(); |
| } |
| return CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(m_Face)); |
| } |
| int32_t CFPF_SkiaFont::GetGlyphIndex(FX_WCHAR wUnicode) { |
| if (!m_Face) { |
| return wUnicode; |
| } |
| if (FXFT_Select_Charmap(m_Face, FXFT_ENCODING_UNICODE)) { |
| return 0; |
| } |
| return FXFT_Get_Char_Index(m_Face, wUnicode); |
| } |
| int32_t CFPF_SkiaFont::GetGlyphWidth(int32_t iGlyphIndex) { |
| if (!m_Face) { |
| return 0; |
| } |
| if (FXFT_Load_Glyph( |
| m_Face, iGlyphIndex, |
| FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { |
| return 0; |
| } |
| return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Glyph_HoriAdvance(m_Face)); |
| } |
| int32_t CFPF_SkiaFont::GetAscent() const { |
| if (!m_Face) { |
| return 0; |
| } |
| return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_Ascender(m_Face)); |
| } |
| int32_t CFPF_SkiaFont::GetDescent() const { |
| if (!m_Face) { |
| return 0; |
| } |
| return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_Descender(m_Face)); |
| } |
| FX_BOOL CFPF_SkiaFont::GetGlyphBBox(int32_t iGlyphIndex, FX_RECT& rtBBox) { |
| if (!m_Face) { |
| return FALSE; |
| } |
| if (FXFT_Is_Face_Tricky(m_Face)) { |
| if (FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72)) { |
| return FALSE; |
| } |
| if (FXFT_Load_Glyph(m_Face, iGlyphIndex, |
| FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { |
| FXFT_Set_Pixel_Sizes(m_Face, 0, 64); |
| return FALSE; |
| } |
| FXFT_Glyph glyph; |
| if (FXFT_Get_Glyph(m_Face->glyph, &glyph)) { |
| FXFT_Set_Pixel_Sizes(m_Face, 0, 64); |
| return FALSE; |
| } |
| FXFT_BBox cbox; |
| FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); |
| int32_t x_ppem = m_Face->size->metrics.x_ppem; |
| int32_t y_ppem = m_Face->size->metrics.y_ppem; |
| rtBBox.left = FPF_EM_ADJUST(x_ppem, cbox.xMin); |
| rtBBox.right = FPF_EM_ADJUST(x_ppem, cbox.xMax); |
| rtBBox.top = FPF_EM_ADJUST(y_ppem, cbox.yMax); |
| rtBBox.bottom = FPF_EM_ADJUST(y_ppem, cbox.yMin); |
| rtBBox.top = std::min(rtBBox.top, GetAscent()); |
| rtBBox.bottom = std::max(rtBBox.bottom, GetDescent()); |
| FXFT_Done_Glyph(glyph); |
| return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0; |
| } |
| if (FXFT_Load_Glyph( |
| m_Face, iGlyphIndex, |
| FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { |
| return FALSE; |
| } |
| rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Glyph_HoriBearingX(m_Face)); |
| rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Glyph_HoriBearingY(m_Face)); |
| rtBBox.right = FPF_EM_ADJUST( |
| FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face)); |
| rtBBox.top = FPF_EM_ADJUST( |
| FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face)); |
| return TRUE; |
| } |
| FX_BOOL CFPF_SkiaFont::GetBBox(FX_RECT& rtBBox) { |
| if (!m_Face) { |
| return FALSE; |
| } |
| rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_xMin(m_Face)); |
| rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_yMin(m_Face)); |
| rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_xMax(m_Face)); |
| rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_yMax(m_Face)); |
| return TRUE; |
| } |
| int32_t CFPF_SkiaFont::GetHeight() const { |
| if (!m_Face) { |
| return 0; |
| } |
| return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), |
| FXFT_Get_Face_Height(m_Face)); |
| } |
| int32_t CFPF_SkiaFont::GetItalicAngle() const { |
| if (!m_Face) { |
| return 0; |
| } |
| TT_Postscript* ttInfo = |
| (TT_Postscript*)FT_Get_Sfnt_Table(m_Face, ft_sfnt_post); |
| if (ttInfo) { |
| return ttInfo->italicAngle; |
| } |
| return 0; |
| } |
| uint32_t CFPF_SkiaFont::GetFontData(uint32_t dwTable, |
| uint8_t* pBuffer, |
| uint32_t dwSize) { |
| if (!m_Face) { |
| return 0; |
| } |
| FT_ULong ulSize = pdfium::base::checked_cast<FT_ULong>(dwSize); |
| if (FXFT_Load_Sfnt_Table(m_Face, dwTable, 0, pBuffer, &ulSize)) { |
| return 0; |
| } |
| return pdfium::base::checked_cast<uint32_t>(ulSize); |
| } |
| FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr* pFontMgr, |
| CFPF_SkiaFontDescriptor* pFontDes, |
| const CFX_ByteStringC& bsFamily, |
| uint32_t dwStyle, |
| uint8_t uCharset) { |
| if (!pFontMgr || !pFontDes) { |
| return FALSE; |
| } |
| switch (pFontDes->GetType()) { |
| case FPF_SKIAFONTTYPE_Path: { |
| CFPF_SkiaPathFont* pFont = (CFPF_SkiaPathFont*)pFontDes; |
| m_Face = pFontMgr->GetFontFace(pFont->m_pPath, pFont->m_iFaceIndex); |
| } break; |
| case FPF_SKIAFONTTYPE_File: { |
| CFPF_SkiaFileFont* pFont = (CFPF_SkiaFileFont*)pFontDes; |
| m_Face = pFontMgr->GetFontFace(pFont->m_pFile, pFont->m_iFaceIndex); |
| } break; |
| case FPF_SKIAFONTTYPE_Buffer: { |
| CFPF_SkiaBufferFont* pFont = (CFPF_SkiaBufferFont*)pFontDes; |
| m_Face = pFontMgr->GetFontFace((const uint8_t*)pFont->m_pBuffer, |
| pFont->m_szBuffer, pFont->m_iFaceIndex); |
| } break; |
| default: |
| return FALSE; |
| } |
| if (!m_Face) { |
| return FALSE; |
| } |
| m_dwStyle = dwStyle; |
| m_uCharset = uCharset; |
| m_pFontMgr = pFontMgr; |
| m_pFontDes = pFontDes; |
| m_dwRefCount = 1; |
| return TRUE; |
| } |
| #endif |
