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