| // Copyright 2014 The PDFium Authors |
| // 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 "xfa/fgas/font/cfgas_gefont.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "build/build_config.h" |
| #include "core/fpdfapi/font/cpdf_font.h" |
| #include "core/fxge/cfx_font.h" |
| #include "core/fxge/cfx_substfont.h" |
| #include "core/fxge/cfx_unicodeencodingex.h" |
| #include "core/fxge/fx_font.h" |
| #include "third_party/base/check.h" |
| #include "xfa/fgas/font/cfgas_fontmgr.h" |
| #include "xfa/fgas/font/cfgas_gemodule.h" |
| #include "xfa/fgas/font/fgas_fontutils.h" |
| |
| // static |
| RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(const wchar_t* pszFontFamily, |
| uint32_t dwFontStyles, |
| FX_CodePage wCodePage) { |
| #if BUILDFLAG(IS_WIN) |
| auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(); |
| if (!pFont->LoadFontInternal(pszFontFamily, dwFontStyles, wCodePage)) |
| return nullptr; |
| return pFont; |
| #else |
| return CFGAS_GEModule::Get()->GetFontMgr()->GetFontByCodePage( |
| wCodePage, dwFontStyles, pszFontFamily); |
| #endif |
| } |
| |
| // static |
| RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(RetainPtr<CPDF_Font> pPDFFont) { |
| auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(); |
| if (!pFont->LoadFontInternal(std::move(pPDFFont))) |
| return nullptr; |
| |
| return pFont; |
| } |
| |
| // static |
| RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont( |
| std::unique_ptr<CFX_Font> pInternalFont) { |
| auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(); |
| if (!pFont->LoadFontInternal(std::move(pInternalFont))) |
| return nullptr; |
| |
| return pFont; |
| } |
| |
| // static |
| RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadStockFont( |
| CPDF_Document* pDoc, |
| const ByteString& font_family) { |
| RetainPtr<CPDF_Font> stock_font = |
| CPDF_Font::GetStockFont(pDoc, font_family.AsStringView()); |
| return stock_font ? CFGAS_GEFont::LoadFont(std::move(stock_font)) : nullptr; |
| } |
| |
| CFGAS_GEFont::CFGAS_GEFont() = default; |
| |
| CFGAS_GEFont::~CFGAS_GEFont() = default; |
| |
| #if BUILDFLAG(IS_WIN) |
| bool CFGAS_GEFont::LoadFontInternal(const wchar_t* pszFontFamily, |
| uint32_t dwFontStyles, |
| FX_CodePage wCodePage) { |
| if (m_pFont) |
| return false; |
| ByteString csFontFamily; |
| if (pszFontFamily) |
| csFontFamily = WideString(pszFontFamily).ToDefANSI(); |
| |
| int32_t iWeight = |
| FontStyleIsForceBold(dwFontStyles) ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL; |
| m_pFont = std::make_unique<CFX_Font>(); |
| if (FontStyleIsItalic(dwFontStyles) && FontStyleIsForceBold(dwFontStyles)) |
| csFontFamily += ",BoldItalic"; |
| else if (FontStyleIsForceBold(dwFontStyles)) |
| csFontFamily += ",Bold"; |
| else if (FontStyleIsItalic(dwFontStyles)) |
| csFontFamily += ",Italic"; |
| |
| m_pFont->LoadSubst(csFontFamily, true, dwFontStyles, iWeight, 0, wCodePage, |
| false); |
| return m_pFont->GetFaceRec() && InitFont(); |
| } |
| #endif // BUILDFLAG(IS_WIN) |
| |
| bool CFGAS_GEFont::LoadFontInternal(RetainPtr<CPDF_Font> pPDFFont) { |
| DCHECK(pPDFFont); |
| |
| if (m_pFont) |
| return false; |
| |
| m_pPDFFont = std::move(pPDFFont); // Keep `pPDFFont` alive for the duration. |
| m_pFont = m_pPDFFont->GetFont(); |
| return InitFont(); |
| } |
| |
| bool CFGAS_GEFont::LoadFontInternal(std::unique_ptr<CFX_Font> pInternalFont) { |
| if (m_pFont || !pInternalFont) |
| return false; |
| |
| m_pFont = std::move(pInternalFont); |
| return InitFont(); |
| } |
| |
| bool CFGAS_GEFont::InitFont() { |
| if (!m_pFont) |
| return false; |
| |
| if (m_pFontEncoding) |
| return true; |
| |
| m_pFontEncoding = FX_CreateFontEncodingEx(m_pFont.Get()); |
| return !!m_pFontEncoding; |
| } |
| |
| WideString CFGAS_GEFont::GetFamilyName() const { |
| CFX_SubstFont* subst_font = m_pFont->GetSubstFont(); |
| ByteString family_name = subst_font && !subst_font->m_Family.IsEmpty() |
| ? subst_font->m_Family |
| : m_pFont->GetFamilyName(); |
| return WideString::FromDefANSI(family_name.AsStringView()); |
| } |
| |
| uint32_t CFGAS_GEFont::GetFontStyles() const { |
| DCHECK(m_pFont); |
| if (m_dwLogFontStyle.has_value()) |
| return m_dwLogFontStyle.value(); |
| |
| uint32_t dwStyles = 0; |
| auto* pSubstFont = m_pFont->GetSubstFont(); |
| if (pSubstFont) { |
| if (pSubstFont->m_Weight == FXFONT_FW_BOLD) |
| dwStyles |= FXFONT_FORCE_BOLD; |
| } else { |
| if (m_pFont->IsBold()) |
| dwStyles |= FXFONT_FORCE_BOLD; |
| if (m_pFont->IsItalic()) |
| dwStyles |= FXFONT_ITALIC; |
| } |
| return dwStyles; |
| } |
| |
| absl::optional<uint16_t> CFGAS_GEFont::GetCharWidth(wchar_t wUnicode) { |
| auto it = m_CharWidthMap.find(wUnicode); |
| if (it != m_CharWidthMap.end()) |
| return it->second; |
| |
| RetainPtr<CFGAS_GEFont> pFont; |
| int32_t glyph; |
| std::tie(glyph, pFont) = GetGlyphIndexAndFont(wUnicode, true); |
| if (!pFont || glyph == 0xffff) { |
| m_CharWidthMap[wUnicode] = absl::nullopt; |
| return absl::nullopt; |
| } |
| if (pFont != this) |
| return pFont->GetCharWidth(wUnicode); |
| |
| int32_t width_from_cfx_font = m_pFont->GetGlyphWidth(glyph); |
| if (width_from_cfx_font < 0) { |
| m_CharWidthMap[wUnicode] = absl::nullopt; |
| return absl::nullopt; |
| } |
| uint16_t width = static_cast<uint16_t>(width_from_cfx_font); |
| m_CharWidthMap[wUnicode] = width; |
| return width; |
| } |
| |
| absl::optional<FX_RECT> CFGAS_GEFont::GetCharBBox(wchar_t wUnicode) { |
| auto it = m_BBoxMap.find(wUnicode); |
| if (it != m_BBoxMap.end()) |
| return it->second; |
| |
| RetainPtr<CFGAS_GEFont> pFont; |
| int32_t iGlyph; |
| std::tie(iGlyph, pFont) = GetGlyphIndexAndFont(wUnicode, true); |
| if (!pFont || iGlyph == 0xFFFF) |
| return absl::nullopt; |
| |
| if (pFont.Get() != this) |
| return pFont->GetCharBBox(wUnicode); |
| |
| absl::optional<FX_RECT> rtBBox = m_pFont->GetGlyphBBox(iGlyph); |
| if (rtBBox.has_value()) |
| m_BBoxMap[wUnicode] = rtBBox.value(); |
| |
| return rtBBox; |
| } |
| |
| int32_t CFGAS_GEFont::GetGlyphIndex(wchar_t wUnicode) { |
| int32_t glyph; |
| RetainPtr<CFGAS_GEFont> font; |
| std::tie(glyph, font) = GetGlyphIndexAndFont(wUnicode, true); |
| return glyph; |
| } |
| |
| std::pair<int32_t, RetainPtr<CFGAS_GEFont>> CFGAS_GEFont::GetGlyphIndexAndFont( |
| wchar_t wUnicode, |
| bool bRecursive) { |
| int32_t iGlyphIndex = m_pFontEncoding->GlyphFromCharCode(wUnicode); |
| if (iGlyphIndex > 0) |
| return {iGlyphIndex, pdfium::WrapRetain(this)}; |
| |
| const FGAS_FONTUSB* pFontUSB = FGAS_GetUnicodeBitField(wUnicode); |
| if (!pFontUSB) |
| return {0xFFFF, nullptr}; |
| |
| uint16_t wBitField = pFontUSB->wBitField; |
| if (wBitField >= 128) |
| return {0xFFFF, nullptr}; |
| |
| auto it = m_FontMapper.find(wUnicode); |
| if (it != m_FontMapper.end() && it->second && it->second.Get() != this) { |
| RetainPtr<CFGAS_GEFont> font; |
| std::tie(iGlyphIndex, font) = |
| it->second->GetGlyphIndexAndFont(wUnicode, false); |
| if (iGlyphIndex != 0xFFFF) { |
| for (size_t i = 0; i < m_SubstFonts.size(); ++i) { |
| if (m_SubstFonts[i] == it->second) |
| return {(iGlyphIndex | ((i + 1) << 24)), it->second}; |
| } |
| } |
| } |
| if (!bRecursive) |
| return {0xFFFF, nullptr}; |
| |
| CFGAS_FontMgr* pFontMgr = CFGAS_GEModule::Get()->GetFontMgr(); |
| WideString wsFamily = GetFamilyName(); |
| RetainPtr<CFGAS_GEFont> pFont = |
| pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), wsFamily.c_str()); |
| #if !BUILDFLAG(IS_WIN) |
| if (!pFont) |
| pFont = pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), nullptr); |
| #endif |
| if (!pFont || pFont == this) // Avoids direct cycles below. |
| return {0xFFFF, nullptr}; |
| |
| m_FontMapper[wUnicode] = pFont; |
| m_SubstFonts.push_back(pFont); |
| |
| RetainPtr<CFGAS_GEFont> font; |
| std::tie(iGlyphIndex, font) = pFont->GetGlyphIndexAndFont(wUnicode, false); |
| if (iGlyphIndex == 0xFFFF) |
| return {0xFFFF, nullptr}; |
| |
| return {(iGlyphIndex | (m_SubstFonts.size() << 24)), pFont}; |
| } |
| |
| int32_t CFGAS_GEFont::GetAscent() const { |
| return m_pFont->GetAscent(); |
| } |
| |
| int32_t CFGAS_GEFont::GetDescent() const { |
| return m_pFont->GetDescent(); |
| } |
| |
| RetainPtr<CFGAS_GEFont> CFGAS_GEFont::GetSubstFont(int32_t iGlyphIndex) { |
| iGlyphIndex = static_cast<uint32_t>(iGlyphIndex) >> 24; |
| if (iGlyphIndex == 0) |
| return pdfium::WrapRetain(this); |
| return m_SubstFonts[iGlyphIndex - 1]; |
| } |