| // Copyright 2016 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/fxge/cfx_fontmgr.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "core/fxge/cfx_face.h" |
| #include "core/fxge/cfx_fontmapper.h" |
| #include "core/fxge/cfx_substfont.h" |
| #include "core/fxge/fontdata/chromefontdata/chromefontdata.h" |
| #include "core/fxge/fx_font.h" |
| #include "core/fxge/systemfontinfo_iface.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/cxx17_backports.h" |
| |
| namespace { |
| |
| struct BuiltinFont { |
| const uint8_t* m_pFontData; // Raw, POD struct. |
| uint32_t m_dwSize; |
| }; |
| |
| constexpr BuiltinFont kFoxitFonts[14] = { |
| {kFoxitFixedFontData, 17597}, |
| {kFoxitFixedBoldFontData, 18055}, |
| {kFoxitFixedBoldItalicFontData, 19151}, |
| {kFoxitFixedItalicFontData, 18746}, |
| {kFoxitSansFontData, 15025}, |
| {kFoxitSansBoldFontData, 16344}, |
| {kFoxitSansBoldItalicFontData, 16418}, |
| {kFoxitSansItalicFontData, 16339}, |
| {kFoxitSerifFontData, 19469}, |
| {kFoxitSerifBoldFontData, 19395}, |
| {kFoxitSerifBoldItalicFontData, 20733}, |
| {kFoxitSerifItalicFontData, 21227}, |
| {kFoxitSymbolFontData, 16729}, |
| {kFoxitDingbatsFontData, 29513}, |
| }; |
| |
| const BuiltinFont kMMFonts[2] = { |
| {kFoxitSerifMMFontData, 113417}, |
| {kFoxitSansMMFontData, 66919}, |
| }; |
| |
| ByteString KeyNameFromFace(const ByteString& face_name, |
| int weight, |
| bool bItalic) { |
| ByteString key(face_name); |
| key += ','; |
| key += ByteString::FormatInteger(weight); |
| key += bItalic ? 'I' : 'N'; |
| return key; |
| } |
| |
| ByteString KeyNameFromSize(int ttc_size, uint32_t checksum) { |
| return ByteString::Format("%d:%d", ttc_size, checksum); |
| } |
| |
| FXFT_LibraryRec* FTLibraryInitHelper() { |
| FXFT_LibraryRec* pLibrary = nullptr; |
| FT_Init_FreeType(&pLibrary); |
| return pLibrary; |
| } |
| |
| } // namespace |
| |
| CFX_FontMgr::FontDesc::FontDesc(std::unique_ptr<uint8_t, FxFreeDeleter> pData, |
| size_t size) |
| : m_Size(size), m_pFontData(std::move(pData)) {} |
| |
| CFX_FontMgr::FontDesc::~FontDesc() = default; |
| |
| void CFX_FontMgr::FontDesc::SetFace(size_t index, CFX_Face* face) { |
| DCHECK(index < pdfium::size(m_TTCFaces)); |
| m_TTCFaces[index].Reset(face); |
| } |
| |
| CFX_Face* CFX_FontMgr::FontDesc::GetFace(size_t index) const { |
| DCHECK(index < pdfium::size(m_TTCFaces)); |
| return m_TTCFaces[index].Get(); |
| } |
| |
| CFX_FontMgr::CFX_FontMgr() |
| : m_FTLibrary(FTLibraryInitHelper()), |
| m_pBuiltinMapper(std::make_unique<CFX_FontMapper>(this)), |
| m_FTLibrarySupportsHinting(SetLcdFilterMode() || |
| FreeTypeVersionSupportsHinting()) {} |
| |
| CFX_FontMgr::~CFX_FontMgr() = default; |
| |
| void CFX_FontMgr::SetSystemFontInfo( |
| std::unique_ptr<SystemFontInfoIface> pFontInfo) { |
| m_pBuiltinMapper->SetSystemFontInfo(std::move(pFontInfo)); |
| } |
| |
| RetainPtr<CFX_Face> CFX_FontMgr::FindSubstFont(const ByteString& face_name, |
| bool bTrueType, |
| uint32_t flags, |
| int weight, |
| int italic_angle, |
| int CharsetCP, |
| CFX_SubstFont* pSubstFont) { |
| return m_pBuiltinMapper->FindSubstFont(face_name, bTrueType, flags, weight, |
| italic_angle, CharsetCP, pSubstFont); |
| } |
| |
| RetainPtr<CFX_FontMgr::FontDesc> CFX_FontMgr::GetCachedFontDesc( |
| const ByteString& face_name, |
| int weight, |
| bool bItalic) { |
| auto it = m_FaceMap.find(KeyNameFromFace(face_name, weight, bItalic)); |
| return it != m_FaceMap.end() ? pdfium::WrapRetain(it->second.Get()) : nullptr; |
| } |
| |
| RetainPtr<CFX_FontMgr::FontDesc> CFX_FontMgr::AddCachedFontDesc( |
| const ByteString& face_name, |
| int weight, |
| bool bItalic, |
| std::unique_ptr<uint8_t, FxFreeDeleter> pData, |
| uint32_t size) { |
| auto pFontDesc = pdfium::MakeRetain<FontDesc>(std::move(pData), size); |
| m_FaceMap[KeyNameFromFace(face_name, weight, bItalic)].Reset(pFontDesc.Get()); |
| return pFontDesc; |
| } |
| |
| RetainPtr<CFX_FontMgr::FontDesc> CFX_FontMgr::GetCachedTTCFontDesc( |
| int ttc_size, |
| uint32_t checksum) { |
| auto it = m_FaceMap.find(KeyNameFromSize(ttc_size, checksum)); |
| return it != m_FaceMap.end() ? pdfium::WrapRetain(it->second.Get()) : nullptr; |
| } |
| |
| RetainPtr<CFX_FontMgr::FontDesc> CFX_FontMgr::AddCachedTTCFontDesc( |
| int ttc_size, |
| uint32_t checksum, |
| std::unique_ptr<uint8_t, FxFreeDeleter> pData, |
| uint32_t size) { |
| auto pNewDesc = pdfium::MakeRetain<FontDesc>(std::move(pData), size); |
| m_FaceMap[KeyNameFromSize(ttc_size, checksum)].Reset(pNewDesc.Get()); |
| return pNewDesc; |
| } |
| |
| RetainPtr<CFX_Face> CFX_FontMgr::NewFixedFace(const RetainPtr<FontDesc>& pDesc, |
| pdfium::span<const uint8_t> span, |
| int face_index) { |
| RetainPtr<CFX_Face> face = |
| CFX_Face::New(m_FTLibrary.get(), pDesc, span, face_index); |
| if (!face) |
| return nullptr; |
| |
| if (FT_Set_Pixel_Sizes(face->GetRec(), 64, 64) != 0) |
| return nullptr; |
| |
| return face; |
| } |
| |
| // static |
| Optional<pdfium::span<const uint8_t>> CFX_FontMgr::GetBuiltinFont( |
| size_t index) { |
| if (index < pdfium::size(kFoxitFonts)) { |
| return pdfium::make_span(kFoxitFonts[index].m_pFontData, |
| kFoxitFonts[index].m_dwSize); |
| } |
| size_t mm_index = index - pdfium::size(kFoxitFonts); |
| if (mm_index < pdfium::size(kMMFonts)) { |
| return pdfium::make_span(kMMFonts[mm_index].m_pFontData, |
| kMMFonts[mm_index].m_dwSize); |
| } |
| return pdfium::nullopt; |
| } |
| |
| bool CFX_FontMgr::FreeTypeVersionSupportsHinting() const { |
| FT_Int major; |
| FT_Int minor; |
| FT_Int patch; |
| FT_Library_Version(m_FTLibrary.get(), &major, &minor, &patch); |
| // Freetype versions >= 2.8.1 support hinting even if subpixel rendering is |
| // disabled. https://sourceforge.net/projects/freetype/files/freetype2/2.8.1/ |
| return major > 2 || (major == 2 && minor > 8) || |
| (major == 2 && minor == 8 && patch >= 1); |
| } |
| |
| bool CFX_FontMgr::SetLcdFilterMode() const { |
| return FT_Library_SetLcdFilter(m_FTLibrary.get(), FT_LCD_FILTER_DEFAULT) != |
| FT_Err_Unimplemented_Feature; |
| } |