blob: fb5944d605382a34db49d0d74cb6bfb7407c6be6 [file] [log] [blame]
// 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 "core/fxcrt/fx_codepage.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/ptr_util.h"
#include "xfa/fgas/font/fgas_fontutils.h"
// static
RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(const wchar_t* pszFontFamily,
uint32_t dwFontStyles,
uint16_t wCodePage,
CFGAS_FontMgr* pFontMgr) {
#if _FX_PLATFORM_ != _FX_PLATFORM_WINDOWS_
if (!pFontMgr)
return nullptr;
return pFontMgr->GetFontByCodePage(wCodePage, dwFontStyles, pszFontFamily);
#else
auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(pFontMgr);
if (!pFont->LoadFontInternal(pszFontFamily, dwFontStyles, wCodePage))
return nullptr;
return pFont;
#endif
}
// static
RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(CFX_Font* pExternalFont,
CFGAS_FontMgr* pFontMgr) {
auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(pFontMgr);
if (!pFont->LoadFontInternal(pExternalFont))
return nullptr;
return pFont;
}
// static
RetainPtr<CFGAS_GEFont> CFGAS_GEFont::LoadFont(
std::unique_ptr<CFX_Font> pInternalFont,
CFGAS_FontMgr* pFontMgr) {
auto pFont = pdfium::MakeRetain<CFGAS_GEFont>(pFontMgr);
if (!pFont->LoadFontInternal(std::move(pInternalFont)))
return nullptr;
return pFont;
}
CFGAS_GEFont::CFGAS_GEFont(CFGAS_FontMgr* pFontMgr) : m_pFontMgr(pFontMgr) {}
CFGAS_GEFont::~CFGAS_GEFont() = default;
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
bool CFGAS_GEFont::LoadFontInternal(const wchar_t* pszFontFamily,
uint32_t dwFontStyles,
uint16_t wCodePage) {
if (m_pFont)
return false;
ByteString csFontFamily;
if (pszFontFamily)
csFontFamily = WideString(pszFontFamily).ToDefANSI();
int32_t iWeight =
FontStyleIsBold(dwFontStyles) ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL;
m_pFont = pdfium::MakeUnique<CFX_Font>();
if (FontStyleIsItalic(dwFontStyles) && FontStyleIsBold(dwFontStyles))
csFontFamily += ",BoldItalic";
else if (FontStyleIsBold(dwFontStyles))
csFontFamily += ",Bold";
else if (FontStyleIsItalic(dwFontStyles))
csFontFamily += ",Italic";
m_pFont->LoadSubst(csFontFamily, true, dwFontStyles, iWeight, 0, wCodePage,
false);
return m_pFont->GetFace() && InitFont();
}
#endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
bool CFGAS_GEFont::LoadFontInternal(CFX_Font* pExternalFont) {
if (m_pFont || !pExternalFont)
return false;
m_pFont = pExternalFont;
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 {
if (!m_pFont->GetSubstFont() ||
m_pFont->GetSubstFont()->m_Family.GetLength() == 0) {
return WideString::FromDefANSI(m_pFont->GetFamilyName().AsStringView());
}
return WideString::FromDefANSI(
m_pFont->GetSubstFont()->m_Family.AsStringView());
}
uint32_t CFGAS_GEFont::GetFontStyles() const {
ASSERT(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_BOLD;
if (pSubstFont->m_bFlagItalic)
dwStyles |= FXFONT_ITALIC;
} else {
if (m_pFont->IsBold())
dwStyles |= FXFONT_BOLD;
if (m_pFont->IsItalic())
dwStyles |= FXFONT_ITALIC;
}
return dwStyles;
}
bool CFGAS_GEFont::GetCharWidth(wchar_t wUnicode, int32_t* pWidth) {
auto it = m_CharWidthMap.find(wUnicode);
*pWidth = it != m_CharWidthMap.end() ? it->second : 0;
if (*pWidth == 65535)
return false;
if (*pWidth > 0)
return true;
RetainPtr<CFGAS_GEFont> pFont;
int32_t iGlyph;
std::tie(iGlyph, pFont) = GetGlyphIndexAndFont(wUnicode, true);
if (iGlyph != 0xFFFF && pFont) {
if (pFont.Get() == this) {
*pWidth = m_pFont->GetGlyphWidth(iGlyph);
if (*pWidth < 0)
*pWidth = -1;
} else if (pFont->GetCharWidth(wUnicode, pWidth)) {
return true;
}
} else {
*pWidth = -1;
}
m_CharWidthMap[wUnicode] = *pWidth;
return *pWidth > 0;
}
bool CFGAS_GEFont::GetCharBBox(wchar_t wUnicode, FX_RECT* bbox) {
auto it = m_BBoxMap.find(wUnicode);
if (it != m_BBoxMap.end()) {
*bbox = it->second;
return true;
}
RetainPtr<CFGAS_GEFont> pFont;
int32_t iGlyph;
std::tie(iGlyph, pFont) = GetGlyphIndexAndFont(wUnicode, true);
if (!pFont || iGlyph == 0xFFFF)
return false;
if (pFont.Get() != this)
return pFont->GetCharBBox(wUnicode, bbox);
FX_RECT rtBBox;
if (!m_pFont->GetGlyphBBox(iGlyph, &rtBBox))
return false;
m_BBoxMap[wUnicode] = rtBBox;
*bbox = rtBBox;
return true;
}
bool CFGAS_GEFont::GetBBox(FX_RECT* bbox) {
return m_pFont->GetBBox(bbox);
}
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 (!m_pFontMgr || !bRecursive)
return {0xFFFF, nullptr};
WideString wsFamily = GetFamilyName();
RetainPtr<CFGAS_GEFont> pFont =
m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), wsFamily.c_str());
#if _FX_PLATFORM_ != _FX_PLATFORM_WINDOWS_
if (!pFont)
pFont = m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), nullptr);
#endif
if (!pFont || pFont.Get() == 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];
}