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// 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 "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 defined(OS_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(
const RetainPtr<CPDF_Font>& pPDFFont) {
auto pFont = pdfium::MakeRetain<CFGAS_GEFont>();
if (!pFont->LoadFontInternal(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(stock_font) : nullptr;
}
CFGAS_GEFont::CFGAS_GEFont() = default;
CFGAS_GEFont::~CFGAS_GEFont() = default;
#if defined(OS_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 // defined(OS_WIN)
bool CFGAS_GEFont::LoadFontInternal(const RetainPtr<CPDF_Font>& pPDFFont) {
CFX_Font* pExternalFont = pPDFFont->GetFont();
if (m_pFont || !pExternalFont)
return false;
m_pFont = pExternalFont;
if (!InitFont())
return false;
m_pPDFFont = pPDFFont; // Keep pPDFFont alive for the duration.
return true;
}
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;
}
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] = pdfium::nullopt;
return pdfium::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] = pdfium::nullopt;
return pdfium::nullopt;
}
uint16_t width = static_cast<uint16_t>(width_from_cfx_font);
m_CharWidthMap[wUnicode] = width;
return width;
}
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 pdfium::nullopt;
if (pFont.Get() != this)
return pFont->GetCharBBox(wUnicode);
Optional<FX_RECT> rtBBox = m_pFont->GetGlyphBBox(iGlyph);
if (rtBBox.has_value())
m_BBoxMap[wUnicode] = rtBBox.value();
return rtBBox;
}
Optional<FX_RECT> CFGAS_GEFont::GetBBox() {
return m_pFont->GetBBox();
}
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 !defined(OS_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];
}