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// 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 "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/ge/cttfontdesc.h"
#include "core/fxge/ifx_systemfontinfo.h"
#include "third_party/base/ptr_util.h"
namespace {
struct BuiltinFont {
const uint8_t* m_pFontData;
uint32_t m_dwSize;
};
const BuiltinFont g_FoxitFonts[14] = {
{g_FoxitFixedFontData, 17597},
{g_FoxitFixedBoldFontData, 18055},
{g_FoxitFixedBoldItalicFontData, 19151},
{g_FoxitFixedItalicFontData, 18746},
{g_FoxitSansFontData, 15025},
{g_FoxitSansBoldFontData, 16344},
{g_FoxitSansBoldItalicFontData, 16418},
{g_FoxitSansItalicFontData, 16339},
{g_FoxitSerifFontData, 19469},
{g_FoxitSerifBoldFontData, 19395},
{g_FoxitSerifBoldItalicFontData, 20733},
{g_FoxitSerifItalicFontData, 21227},
{g_FoxitSymbolFontData, 16729},
{g_FoxitDingbatsFontData, 29513},
};
const BuiltinFont g_MMFonts[2] = {
{g_FoxitSerifMMFontData, 113417},
{g_FoxitSansMMFontData, 66919},
};
CFX_ByteString KeyNameFromFace(const CFX_ByteString& face_name,
int weight,
FX_BOOL bItalic) {
CFX_ByteString key(face_name);
key += ',';
key += CFX_ByteString::FormatInteger(weight);
key += bItalic ? 'I' : 'N';
return key;
}
CFX_ByteString KeyNameFromSize(int ttc_size, uint32_t checksum) {
CFX_ByteString key;
key.Format("%d:%d", ttc_size, checksum);
return key;
}
int GetTTCIndex(const uint8_t* pFontData,
uint32_t ttc_size,
uint32_t font_offset) {
int face_index = 0;
const uint8_t* p = pFontData + 8;
uint32_t nfont = GET_TT_LONG(p);
uint32_t index;
for (index = 0; index < nfont; index++) {
p = pFontData + 12 + index * 4;
if (GET_TT_LONG(p) == font_offset)
break;
}
if (index >= nfont)
face_index = 0;
else
face_index = index;
return face_index;
}
} // namespace
CFX_FontMgr::CFX_FontMgr()
: m_FTLibrary(nullptr), m_FTLibrarySupportsHinting(false) {
m_pBuiltinMapper = pdfium::MakeUnique<CFX_FontMapper>(this);
}
CFX_FontMgr::~CFX_FontMgr() {
for (const auto& pair : m_FaceMap)
delete pair.second;
// |m_pBuiltinMapper| references |m_FTLibrary|, so it has to be destroyed
// first.
m_pBuiltinMapper.reset();
FXFT_Done_FreeType(m_FTLibrary);
}
void CFX_FontMgr::InitFTLibrary() {
if (m_FTLibrary)
return;
FXFT_Init_FreeType(&m_FTLibrary);
m_FTLibrarySupportsHinting =
FXFT_Library_SetLcdFilter(m_FTLibrary, FT_LCD_FILTER_DEFAULT) !=
FT_Err_Unimplemented_Feature;
}
void CFX_FontMgr::SetSystemFontInfo(
std::unique_ptr<IFX_SystemFontInfo> pFontInfo) {
m_pBuiltinMapper->SetSystemFontInfo(std::move(pFontInfo));
}
FXFT_Face CFX_FontMgr::FindSubstFont(const CFX_ByteString& face_name,
FX_BOOL bTrueType,
uint32_t flags,
int weight,
int italic_angle,
int CharsetCP,
CFX_SubstFont* pSubstFont) {
InitFTLibrary();
return m_pBuiltinMapper->FindSubstFont(face_name, bTrueType, flags, weight,
italic_angle, CharsetCP, pSubstFont);
}
FXFT_Face CFX_FontMgr::GetCachedFace(const CFX_ByteString& face_name,
int weight,
FX_BOOL bItalic,
uint8_t*& pFontData) {
auto it = m_FaceMap.find(KeyNameFromFace(face_name, weight, bItalic));
if (it == m_FaceMap.end())
return nullptr;
CTTFontDesc* pFontDesc = it->second;
pFontData = pFontDesc->m_pFontData;
pFontDesc->m_RefCount++;
return pFontDesc->m_SingleFace.m_pFace;
}
FXFT_Face CFX_FontMgr::AddCachedFace(const CFX_ByteString& face_name,
int weight,
FX_BOOL bItalic,
uint8_t* pData,
uint32_t size,
int face_index) {
CTTFontDesc* pFontDesc = new CTTFontDesc;
pFontDesc->m_Type = 1;
pFontDesc->m_SingleFace.m_pFace = nullptr;
pFontDesc->m_SingleFace.m_bBold = weight;
pFontDesc->m_SingleFace.m_bItalic = bItalic;
pFontDesc->m_pFontData = pData;
pFontDesc->m_RefCount = 1;
InitFTLibrary();
FXFT_Library library = m_FTLibrary;
int ret = FXFT_New_Memory_Face(library, pData, size, face_index,
&pFontDesc->m_SingleFace.m_pFace);
if (ret) {
delete pFontDesc;
return nullptr;
}
ret = FXFT_Set_Pixel_Sizes(pFontDesc->m_SingleFace.m_pFace, 64, 64);
if (ret) {
delete pFontDesc;
return nullptr;
}
m_FaceMap[KeyNameFromFace(face_name, weight, bItalic)] = pFontDesc;
return pFontDesc->m_SingleFace.m_pFace;
}
FXFT_Face CFX_FontMgr::GetCachedTTCFace(int ttc_size,
uint32_t checksum,
int font_offset,
uint8_t*& pFontData) {
auto it = m_FaceMap.find(KeyNameFromSize(ttc_size, checksum));
if (it == m_FaceMap.end())
return nullptr;
CTTFontDesc* pFontDesc = it->second;
pFontData = pFontDesc->m_pFontData;
pFontDesc->m_RefCount++;
int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
if (!pFontDesc->m_TTCFace.m_pFaces[face_index]) {
pFontDesc->m_TTCFace.m_pFaces[face_index] =
GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
}
return pFontDesc->m_TTCFace.m_pFaces[face_index];
}
FXFT_Face CFX_FontMgr::AddCachedTTCFace(int ttc_size,
uint32_t checksum,
uint8_t* pData,
uint32_t size,
int font_offset) {
CTTFontDesc* pFontDesc = new CTTFontDesc;
pFontDesc->m_Type = 2;
pFontDesc->m_pFontData = pData;
for (int i = 0; i < 16; i++)
pFontDesc->m_TTCFace.m_pFaces[i] = nullptr;
pFontDesc->m_RefCount++;
m_FaceMap[KeyNameFromSize(ttc_size, checksum)] = pFontDesc;
int face_index = GetTTCIndex(pFontDesc->m_pFontData, ttc_size, font_offset);
pFontDesc->m_TTCFace.m_pFaces[face_index] =
GetFixedFace(pFontDesc->m_pFontData, ttc_size, face_index);
return pFontDesc->m_TTCFace.m_pFaces[face_index];
}
FXFT_Face CFX_FontMgr::GetFixedFace(const uint8_t* pData,
uint32_t size,
int face_index) {
InitFTLibrary();
FXFT_Library library = m_FTLibrary;
FXFT_Face face = nullptr;
if (FXFT_New_Memory_Face(library, pData, size, face_index, &face))
return nullptr;
return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
}
FXFT_Face CFX_FontMgr::GetFileFace(const FX_CHAR* filename, int face_index) {
InitFTLibrary();
FXFT_Library library = m_FTLibrary;
FXFT_Face face = nullptr;
if (FXFT_New_Face(library, filename, face_index, &face))
return nullptr;
return FXFT_Set_Pixel_Sizes(face, 64, 64) ? nullptr : face;
}
void CFX_FontMgr::ReleaseFace(FXFT_Face face) {
if (!face)
return;
FX_BOOL bNeedFaceDone = TRUE;
auto it = m_FaceMap.begin();
while (it != m_FaceMap.end()) {
auto temp = it++;
int nRet = temp->second->ReleaseFace(face);
if (nRet == -1)
continue;
bNeedFaceDone = FALSE;
if (nRet == 0)
m_FaceMap.erase(temp);
break;
}
if (bNeedFaceDone && !m_pBuiltinMapper->IsBuiltinFace(face))
FXFT_Done_Face(face);
}
bool CFX_FontMgr::GetBuiltinFont(size_t index,
const uint8_t** pFontData,
uint32_t* size) {
if (index < FX_ArraySize(g_FoxitFonts)) {
*pFontData = g_FoxitFonts[index].m_pFontData;
*size = g_FoxitFonts[index].m_dwSize;
return true;
}
index -= FX_ArraySize(g_FoxitFonts);
if (index < FX_ArraySize(g_MMFonts)) {
*pFontData = g_MMFonts[index].m_pFontData;
*size = g_MMFonts[index].m_dwSize;
return true;
}
return false;
}
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