diff options
Diffstat (limited to 'core/fxge/android/fpf_skiafont.cpp')
| -rw-r--r-- | core/fxge/android/fpf_skiafont.cpp | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/core/fxge/android/fpf_skiafont.cpp b/core/fxge/android/fpf_skiafont.cpp new file mode 100644 index 0000000000..b94ec055bf --- /dev/null +++ b/core/fxge/android/fpf_skiafont.cpp @@ -0,0 +1,217 @@ +// 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/include/fxcrt/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; +} +FX_DWORD CFPF_SkiaFont::GetFontData(FX_DWORD dwTable, + uint8_t* pBuffer, + FX_DWORD 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<FX_DWORD>(ulSize); +} +FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr* pFontMgr, + CFPF_SkiaFontDescriptor* pFontDes, + const CFX_ByteStringC& bsFamily, + FX_DWORD 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 |