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pdfium / pdfium / refs/heads/chromium/3807 / . / core / fxge / cfx_font.cpp
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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 "core/fxge/cfx_font.h"
#include <algorithm>
#include <limits>
#include <memory>
#include <utility>
#include <vector>
#include "build/build_config.h"
#include "core/fxcrt/fx_codepage.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxge/cfx_fontcache.h"
#include "core/fxge/cfx_fontmgr.h"
#include "core/fxge/cfx_gemodule.h"
#include "core/fxge/cfx_glyphcache.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_substfont.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/scoped_font_transform.h"
#include "third_party/base/ptr_util.h"
#define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
namespace {
constexpr int kThousandthMinInt = std::numeric_limits<int>::min() / 1000;
constexpr int kThousandthMaxInt = std::numeric_limits<int>::max() / 1000;
struct OUTLINE_PARAMS {
CFX_PathData* m_pPath;
int m_CurX;
int m_CurY;
float m_CoordUnit;
};
#ifdef PDF_ENABLE_XFA
unsigned long FTStreamRead(FXFT_Stream stream,
unsigned long offset,
unsigned char* buffer,
unsigned long count) {
if (count == 0)
return 0;
IFX_SeekableReadStream* pFile =
static_cast<IFX_SeekableReadStream*>(stream->descriptor.pointer);
return pFile && pFile->ReadBlockAtOffset(buffer, offset, count) ? count : 0;
}
void FTStreamClose(FXFT_Stream stream) {}
FXFT_Face LoadFileImp(FXFT_Library library,
const RetainPtr<IFX_SeekableReadStream>& pFile,
int32_t faceIndex,
std::unique_ptr<FXFT_StreamRec>* stream) {
auto stream1 = pdfium::MakeUnique<FXFT_StreamRec>();
stream1->base = nullptr;
stream1->size = static_cast<unsigned long>(pFile->GetSize());
stream1->pos = 0;
stream1->descriptor.pointer = static_cast<void*>(pFile.Get());
stream1->close = FTStreamClose;
stream1->read = FTStreamRead;
FXFT_Open_Args args;
args.flags = FT_OPEN_STREAM;
args.stream = stream1.get();
FXFT_Face face;
if (FXFT_Open_Face(library, &args, faceIndex, &face))
return nullptr;
if (stream)
*stream = std::move(stream1);
return face;
}
#endif // PDF_ENABLE_XFA
void Outline_CheckEmptyContour(OUTLINE_PARAMS* param) {
std::vector<FX_PATHPOINT>& points = param->m_pPath->GetPoints();
size_t size = points.size();
if (size >= 2 && points[size - 2].IsTypeAndOpen(FXPT_TYPE::MoveTo) &&
points[size - 2].m_Point == points[size - 1].m_Point) {
size -= 2;
}
if (size >= 4 && points[size - 4].IsTypeAndOpen(FXPT_TYPE::MoveTo) &&
points[size - 3].IsTypeAndOpen(FXPT_TYPE::BezierTo) &&
points[size - 3].m_Point == points[size - 4].m_Point &&
points[size - 2].m_Point == points[size - 4].m_Point &&
points[size - 1].m_Point == points[size - 4].m_Point) {
size -= 4;
}
points.resize(size);
}
int Outline_MoveTo(const FXFT_Vector* to, void* user) {
OUTLINE_PARAMS* param = static_cast<OUTLINE_PARAMS*>(user);
Outline_CheckEmptyContour(param);
param->m_pPath->ClosePath();
param->m_pPath->AppendPoint(
CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit),
FXPT_TYPE::MoveTo, false);
param->m_CurX = to->x;
param->m_CurY = to->y;
return 0;
}
int Outline_LineTo(const FXFT_Vector* to, void* user) {
OUTLINE_PARAMS* param = static_cast<OUTLINE_PARAMS*>(user);
param->m_pPath->AppendPoint(
CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit),
FXPT_TYPE::LineTo, false);
param->m_CurX = to->x;
param->m_CurY = to->y;
return 0;
}
int Outline_ConicTo(const FXFT_Vector* control,
const FXFT_Vector* to,
void* user) {
OUTLINE_PARAMS* param = static_cast<OUTLINE_PARAMS*>(user);
param->m_pPath->AppendPoint(
CFX_PointF((param->m_CurX + (control->x - param->m_CurX) * 2 / 3) /
param->m_CoordUnit,
(param->m_CurY + (control->y - param->m_CurY) * 2 / 3) /
param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_pPath->AppendPoint(
CFX_PointF((control->x + (to->x - control->x) / 3) / param->m_CoordUnit,
(control->y + (to->y - control->y) / 3) / param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_pPath->AppendPoint(
CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_CurX = to->x;
param->m_CurY = to->y;
return 0;
}
int Outline_CubicTo(const FXFT_Vector* control1,
const FXFT_Vector* control2,
const FXFT_Vector* to,
void* user) {
OUTLINE_PARAMS* param = static_cast<OUTLINE_PARAMS*>(user);
param->m_pPath->AppendPoint(CFX_PointF(control1->x / param->m_CoordUnit,
control1->y / param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_pPath->AppendPoint(CFX_PointF(control2->x / param->m_CoordUnit,
control2->y / param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_pPath->AppendPoint(
CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit),
FXPT_TYPE::BezierTo, false);
param->m_CurX = to->x;
param->m_CurY = to->y;
return 0;
}
bool ShouldAppendStyle(const ByteString& style) {
return !style.IsEmpty() && style != "Regular";
}
} // namespace
const char CFX_Font::s_AngleSkew[] = {
0, 2, 3, 5, 7, 9, 11, 12, 14, 16, 18, 19, 21, 23, 25,
27, 29, 31, 32, 34, 36, 38, 40, 42, 45, 47, 49, 51, 53, 55,
};
const uint8_t CFX_Font::s_WeightPow[] = {
0, 3, 6, 7, 8, 9, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 35, 36, 36, 37,
37, 37, 38, 38, 38, 39, 39, 39, 40, 40, 40, 41, 41, 41, 42, 42, 42,
42, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47,
47, 47, 47, 48, 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 50,
51, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53, 53, 53, 53, 53,
};
const uint8_t CFX_Font::s_WeightPow_11[] = {
0, 4, 7, 8, 9, 10, 12, 13, 15, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 39, 40, 40, 41,
41, 41, 42, 42, 42, 43, 43, 43, 44, 44, 44, 45, 45, 45, 46, 46, 46,
46, 43, 47, 47, 48, 48, 48, 48, 45, 50, 50, 50, 46, 51, 51, 51, 52,
52, 52, 52, 53, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55, 55,
56, 56, 56, 56, 56, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58,
};
const uint8_t CFX_Font::s_WeightPow_SHIFTJIS[] = {
0, 0, 1, 2, 3, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 21,
22, 24, 26, 28, 30, 32, 33, 35, 37, 39, 41, 43, 45, 48, 48, 48, 48,
49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53,
53, 53, 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 56, 56, 56,
56, 56, 56, 57, 57, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58, 58, 58,
59, 59, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 60, 60, 60,
};
const CFX_Font::CharsetFontMap CFX_Font::defaultTTFMap[] = {
{FX_CHARSET_ANSI, kDefaultAnsiFontName},
{FX_CHARSET_ChineseSimplified, "SimSun"},
{FX_CHARSET_ChineseTraditional, "MingLiU"},
{FX_CHARSET_ShiftJIS, "MS Gothic"},
{FX_CHARSET_Hangul, "Batang"},
{FX_CHARSET_MSWin_Cyrillic, "Arial"},
#if _FX_PLATFORM_ == _FX_PLATFORM_LINUX_ || defined(OS_MACOSX)
{FX_CHARSET_MSWin_EasternEuropean, "Arial"},
#else
{FX_CHARSET_MSWin_EasternEuropean, "Tahoma"},
#endif
{FX_CHARSET_MSWin_Arabic, "Arial"},
{-1, nullptr}};
// static
const char CFX_Font::kUntitledFontName[] = "Untitled";
// static
const char CFX_Font::kDefaultAnsiFontName[] = "Helvetica";
// static
const char CFX_Font::kUniversalDefaultFontName[] = "Arial Unicode MS";
// static
ByteString CFX_Font::GetDefaultFontNameByCharset(uint8_t nCharset) {
int i = 0;
while (defaultTTFMap[i].charset != -1) {
if (nCharset == static_cast<uint8_t>(defaultTTFMap[i].charset))
return defaultTTFMap[i].fontname;
++i;
}
return kUniversalDefaultFontName;
}
// static
uint8_t CFX_Font::GetCharSetFromUnicode(uint16_t word) {
// to avoid CJK Font to show ASCII
if (word < 0x7F)
return FX_CHARSET_ANSI;
// find new charset
if ((word >= 0x4E00 && word <= 0x9FA5) ||
(word >= 0xE7C7 && word <= 0xE7F3) ||
(word >= 0x3000 && word <= 0x303F) ||
(word >= 0x2000 && word <= 0x206F)) {
return FX_CHARSET_ChineseSimplified;
}
if (((word >= 0x3040) && (word <= 0x309F)) ||
((word >= 0x30A0) && (word <= 0x30FF)) ||
((word >= 0x31F0) && (word <= 0x31FF)) ||
((word >= 0xFF00) && (word <= 0xFFEF))) {
return FX_CHARSET_ShiftJIS;
}
if (((word >= 0xAC00) && (word <= 0xD7AF)) ||
((word >= 0x1100) && (word <= 0x11FF)) ||
((word >= 0x3130) && (word <= 0x318F))) {
return FX_CHARSET_Hangul;
}
if (word >= 0x0E00 && word <= 0x0E7F)
return FX_CHARSET_Thai;
if ((word >= 0x0370 && word <= 0x03FF) || (word >= 0x1F00 && word <= 0x1FFF))
return FX_CHARSET_MSWin_Greek;
if ((word >= 0x0600 && word <= 0x06FF) || (word >= 0xFB50 && word <= 0xFEFC))
return FX_CHARSET_MSWin_Arabic;
if (word >= 0x0590 && word <= 0x05FF)
return FX_CHARSET_MSWin_Hebrew;
if (word >= 0x0400 && word <= 0x04FF)
return FX_CHARSET_MSWin_Cyrillic;
if (word >= 0x0100 && word <= 0x024F)
return FX_CHARSET_MSWin_EasternEuropean;
if (word >= 0x1E00 && word <= 0x1EFF)
return FX_CHARSET_MSWin_Vietnamese;
return FX_CHARSET_ANSI;
}
CFX_Font::CFX_Font() = default;
#ifdef PDF_ENABLE_XFA
bool CFX_Font::LoadFile(const RetainPtr<IFX_SeekableReadStream>& pFile,
int nFaceIndex) {
m_bEmbedded = false;
CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr();
pFontMgr->InitFTLibrary();
std::unique_ptr<FXFT_StreamRec> stream;
m_Face = LoadFileImp(pFontMgr->GetFTLibrary(), pFile, nFaceIndex, &stream);
if (!m_Face)
return false;
m_pOwnedStream = std::move(stream);
FXFT_Set_Pixel_Sizes(m_Face.Get(), 0, 64);
return true;
}
#if !defined(OS_WIN)
void CFX_Font::SetFace(FXFT_Face face) {
ClearGlyphCache();
m_Face = face;
}
void CFX_Font::SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) {
m_pSubstFont = std::move(subst);
}
#endif // !defined(OS_WIN)
#endif // PDF_ENABLE_XFA
CFX_Font::~CFX_Font() {
m_FontData = {}; // m_FontData can't outive m_Face.
if (m_Face)
DeleteFace();
#if defined(OS_MACOSX)
ReleasePlatformResource();
#endif
}
void CFX_Font::DeleteFace() {
ClearGlyphCache();
if (m_bEmbedded)
FXFT_Done_Face(m_Face.Release());
else
CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face.Release());
}
void CFX_Font::LoadSubst(const ByteString& face_name,
bool bTrueType,
uint32_t flags,
int weight,
int italic_angle,
int CharsetCP,
bool bVertical) {
m_bEmbedded = false;
m_bVertical = bVertical;
m_pSubstFont = pdfium::MakeUnique<CFX_SubstFont>();
m_Face = CFX_GEModule::Get()->GetFontMgr()->FindSubstFont(
face_name, bTrueType, flags, weight, italic_angle, CharsetCP,
m_pSubstFont.get());
if (m_Face) {
m_FontData = {FXFT_Get_Face_Stream_Base(m_Face.Get()),
FXFT_Get_Face_Stream_Size(m_Face.Get())};
}
}
uint32_t CFX_Font::GetGlyphWidth(uint32_t glyph_index) {
if (!m_Face)
return 0;
if (m_pSubstFont && m_pSubstFont->m_bFlagMM)
AdjustMMParams(glyph_index, 0, 0);
int err = FXFT_Load_Glyph(
m_Face.Get(), glyph_index,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
if (err)
return 0;
int horiAdvance = FXFT_Get_Glyph_HoriAdvance(m_Face.Get());
if (horiAdvance < 0 || horiAdvance > kThousandthMaxInt)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face.Get()), horiAdvance);
}
bool CFX_Font::LoadEmbedded(pdfium::span<const uint8_t> src_span) {
m_pFontDataAllocation =
std::vector<uint8_t>(src_span.begin(), src_span.end());
m_Face =
CFX_GEModule::Get()->GetFontMgr()->GetFixedFace(m_pFontDataAllocation, 0);
m_bEmbedded = true;
m_FontData = m_pFontDataAllocation;
return !!m_Face;
}
bool CFX_Font::IsTTFont() const {
return m_Face && FXFT_Is_Face_TT_OT(m_Face.Get()) == FXFT_FACE_FLAG_SFNT;
}
int CFX_Font::GetAscent() const {
if (!m_Face)
return 0;
int ascender = FXFT_Get_Face_Ascender(m_Face.Get());
if (ascender < kThousandthMinInt || ascender > kThousandthMaxInt)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face.Get()), ascender);
}
int CFX_Font::GetDescent() const {
if (!m_Face)
return 0;
int descender = FXFT_Get_Face_Descender(m_Face.Get());
if (descender < kThousandthMinInt || descender > kThousandthMaxInt)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face.Get()), descender);
}
bool CFX_Font::GetGlyphBBox(uint32_t glyph_index, FX_RECT* pBBox) {
if (!m_Face)
return false;
if (FXFT_Is_Face_Tricky(m_Face.Get())) {
int error = FXFT_Set_Char_Size(m_Face.Get(), 0, 1000 * 64, 72, 72);
if (error)
return false;
error = FXFT_Load_Glyph(m_Face.Get(), glyph_index,
FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
if (error)
return false;
FXFT_BBox cbox;
FT_Glyph glyph;
error = FXFT_Get_Glyph(m_Face->glyph, &glyph);
if (error)
return false;
FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
int pixel_size_x = m_Face->size->metrics.x_ppem,
pixel_size_y = m_Face->size->metrics.y_ppem;
if (pixel_size_x == 0 || pixel_size_y == 0) {
pBBox->left = cbox.xMin;
pBBox->right = cbox.xMax;
pBBox->top = cbox.yMax;
pBBox->bottom = cbox.yMin;
} else {
pBBox->left = cbox.xMin * 1000 / pixel_size_x;
pBBox->right = cbox.xMax * 1000 / pixel_size_x;
pBBox->top = cbox.yMax * 1000 / pixel_size_y;
pBBox->bottom = cbox.yMin * 1000 / pixel_size_y;
}
pBBox->top = std::min(
pBBox->top, static_cast<int32_t>(FXFT_Get_Face_Ascender(m_Face.Get())));
pBBox->bottom =
std::max(pBBox->bottom,
static_cast<int32_t>(FXFT_Get_Face_Descender(m_Face.Get())));
FT_Done_Glyph(glyph);
return FXFT_Set_Pixel_Sizes(m_Face.Get(), 0, 64) == 0;
}
if (FXFT_Load_Glyph(
m_Face.Get(), glyph_index,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
return false;
}
int em = FXFT_Get_Face_UnitsPerEM(m_Face.Get());
if (em == 0) {
pBBox->left = FXFT_Get_Glyph_HoriBearingX(m_Face.Get());
pBBox->bottom = FXFT_Get_Glyph_HoriBearingY(m_Face.Get());
pBBox->top = pBBox->bottom - FXFT_Get_Glyph_Height(m_Face.Get());
pBBox->right = pBBox->left + FXFT_Get_Glyph_Width(m_Face.Get());
} else {
pBBox->left = FXFT_Get_Glyph_HoriBearingX(m_Face.Get()) * 1000 / em;
pBBox->top = (FXFT_Get_Glyph_HoriBearingY(m_Face.Get()) -
FXFT_Get_Glyph_Height(m_Face.Get())) *
1000 / em;
pBBox->right = (FXFT_Get_Glyph_HoriBearingX(m_Face.Get()) +
FXFT_Get_Glyph_Width(m_Face.Get())) *
1000 / em;
pBBox->bottom = (FXFT_Get_Glyph_HoriBearingY(m_Face.Get())) * 1000 / em;
}
return true;
}
bool CFX_Font::IsItalic() const {
if (!m_Face)
return false;
if (FXFT_Is_Face_Italic(m_Face.Get()) == FXFT_STYLE_FLAG_ITALIC)
return true;
ByteString str(FXFT_Get_Face_Style_Name(m_Face.Get()));
str.MakeLower();
return str.Contains("italic");
}
bool CFX_Font::IsBold() const {
return m_Face && FXFT_Is_Face_Bold(m_Face.Get()) == FXFT_STYLE_FLAG_BOLD;
}
bool CFX_Font::IsFixedWidth() const {
return m_Face && FXFT_Is_Face_fixedwidth(m_Face.Get()) != 0;
}
ByteString CFX_Font::GetPsName() const {
if (!m_Face)
return ByteString();
ByteString psName = FXFT_Get_Postscript_Name(m_Face.Get());
if (psName.IsEmpty())
psName = kUntitledFontName;
return psName;
}
ByteString CFX_Font::GetFamilyName() const {
if (!m_Face && !m_pSubstFont)
return ByteString();
if (m_Face)
return ByteString(FXFT_Get_Face_Family_Name(m_Face.Get()));
return m_pSubstFont->m_Family;
}
ByteString CFX_Font::GetFamilyNameOrUntitled() const {
ByteString facename = GetFamilyName();
return facename.IsEmpty() ? kUntitledFontName : facename;
}
ByteString CFX_Font::GetFaceName() const {
if (!m_Face && !m_pSubstFont)
return ByteString();
if (m_Face) {
ByteString style = ByteString(FXFT_Get_Face_Style_Name(m_Face.Get()));
ByteString facename = GetFamilyNameOrUntitled();
if (ShouldAppendStyle(style))
facename += " " + style;
return facename;
}
return m_pSubstFont->m_Family;
}
ByteString CFX_Font::GetBaseFontName(bool restrict_to_psname) const {
ByteString psname = GetPsName();
if (restrict_to_psname || (!psname.IsEmpty() && psname != kUntitledFontName))
return psname;
if (!m_Face && !m_pSubstFont)
return ByteString();
if (m_Face) {
ByteString style = ByteString(FXFT_Get_Face_Style_Name(m_Face.Get()));
ByteString facename = GetFamilyNameOrUntitled();
if (IsTTFont())
facename.Remove(' ');
if (ShouldAppendStyle(style))
facename += (IsTTFont() ? "," : " ") + style;
return facename;
}
return m_pSubstFont->m_Family;
}
bool CFX_Font::GetBBox(FX_RECT* pBBox) {
if (!m_Face)
return false;
int em = FXFT_Get_Face_UnitsPerEM(m_Face.Get());
if (em == 0) {
pBBox->left = FXFT_Get_Face_xMin(m_Face.Get());
pBBox->bottom = FXFT_Get_Face_yMax(m_Face.Get());
pBBox->top = FXFT_Get_Face_yMin(m_Face.Get());
pBBox->right = FXFT_Get_Face_xMax(m_Face.Get());
} else {
pBBox->left = FXFT_Get_Face_xMin(m_Face.Get()) * 1000 / em;
pBBox->top = FXFT_Get_Face_yMin(m_Face.Get()) * 1000 / em;
pBBox->right = FXFT_Get_Face_xMax(m_Face.Get()) * 1000 / em;
pBBox->bottom = FXFT_Get_Face_yMax(m_Face.Get()) * 1000 / em;
}
return true;
}
RetainPtr<CFX_GlyphCache> CFX_Font::GetOrCreateGlyphCache() const {
if (!m_GlyphCache)
m_GlyphCache = CFX_GEModule::Get()->GetFontCache()->GetGlyphCache(this);
return m_GlyphCache;
}
void CFX_Font::ClearGlyphCache() {
m_GlyphCache = nullptr;
}
void CFX_Font::AdjustMMParams(int glyph_index,
int dest_width,
int weight) const {
ASSERT(dest_width >= 0);
FXFT_MM_Var pMasters = nullptr;
FXFT_Get_MM_Var(m_Face.Get(), &pMasters);
if (!pMasters)
return;
long coords[2];
if (weight == 0)
coords[0] = FXFT_Get_MM_Axis_Def(FXFT_Get_MM_Axis(pMasters, 0)) / 65536;
else
coords[0] = weight;
if (dest_width == 0) {
coords[1] = FXFT_Get_MM_Axis_Def(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
} else {
int min_param = FXFT_Get_MM_Axis_Min(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
int max_param = FXFT_Get_MM_Axis_Max(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
coords[1] = min_param;
FXFT_Set_MM_Design_Coordinates(m_Face.Get(), 2, coords);
FXFT_Load_Glyph(m_Face.Get(), glyph_index,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
int min_width = FXFT_Get_Glyph_HoriAdvance(m_Face.Get()) * 1000 /
FXFT_Get_Face_UnitsPerEM(m_Face.Get());
coords[1] = max_param;
FXFT_Set_MM_Design_Coordinates(m_Face.Get(), 2, coords);
FXFT_Load_Glyph(m_Face.Get(), glyph_index,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
int max_width = FXFT_Get_Glyph_HoriAdvance(m_Face.Get()) * 1000 /
FXFT_Get_Face_UnitsPerEM(m_Face.Get());
if (max_width == min_width) {
FXFT_Free(m_Face.Get(), pMasters);
return;
}
int param = min_param + (max_param - min_param) * (dest_width - min_width) /
(max_width - min_width);
coords[1] = param;
}
FXFT_Free(m_Face.Get(), pMasters);
FXFT_Set_MM_Design_Coordinates(m_Face.Get(), 2, coords);
}
CFX_PathData* CFX_Font::LoadGlyphPathImpl(uint32_t glyph_index,
uint32_t dest_width) const {
if (!m_Face)
return nullptr;
FXFT_Set_Pixel_Sizes(m_Face.Get(), 0, 64);
FXFT_Matrix ft_matrix = {65536, 0, 0, 65536};
if (m_pSubstFont) {
if (m_pSubstFont->m_ItalicAngle) {
int skew = m_pSubstFont->m_ItalicAngle;
// |skew| is nonpositive so |-skew| is used as the index. We need to make
// sure |skew| != INT_MIN since -INT_MIN is undefined.
if (skew <= 0 && skew != std::numeric_limits<int>::min() &&
static_cast<size_t>(-skew) < kAngleSkewArraySize) {
skew = -s_AngleSkew[-skew];
} else {
skew = -58;
}
if (m_bVertical)
ft_matrix.yx += ft_matrix.yy * skew / 100;
else
ft_matrix.xy -= ft_matrix.xx * skew / 100;
}
if (m_pSubstFont->m_bFlagMM)
AdjustMMParams(glyph_index, dest_width, m_pSubstFont->m_Weight);
}
ScopedFontTransform scoped_transform(m_Face.Get(), &ft_matrix);
int load_flags = FXFT_LOAD_NO_BITMAP;
if (!(m_Face->face_flags & FT_FACE_FLAG_SFNT) || !FT_IS_TRICKY(m_Face.Get()))
load_flags |= FT_LOAD_NO_HINTING;
if (FXFT_Load_Glyph(m_Face.Get(), glyph_index, load_flags))
return nullptr;
if (m_pSubstFont && !m_pSubstFont->m_bFlagMM &&
m_pSubstFont->m_Weight > 400) {
uint32_t index = (m_pSubstFont->m_Weight - 400) / 10;
index = std::min(index, static_cast<uint32_t>(kWeightPowArraySize - 1));
int level = 0;
if (m_pSubstFont->m_Charset == FX_CHARSET_ShiftJIS)
level = s_WeightPow_SHIFTJIS[index] * 2 * 65536 / 36655;
else
level = s_WeightPow[index] * 2;
FXFT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face.Get()), level);
}
FXFT_Outline_Funcs funcs;
funcs.move_to = Outline_MoveTo;
funcs.line_to = Outline_LineTo;
funcs.conic_to = Outline_ConicTo;
funcs.cubic_to = Outline_CubicTo;
funcs.shift = 0;
funcs.delta = 0;
OUTLINE_PARAMS params;
auto pPath = pdfium::MakeUnique<CFX_PathData>();
params.m_pPath = pPath.get();
params.m_CurX = params.m_CurY = 0;
params.m_CoordUnit = 64 * 64.0;
FXFT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face.Get()), &funcs, &params);
if (pPath->GetPoints().empty())
return nullptr;
Outline_CheckEmptyContour(&params);
pPath->ClosePath();
return pPath.release();
}
const CFX_GlyphBitmap* CFX_Font::LoadGlyphBitmap(uint32_t glyph_index,
bool bFontStyle,
const CFX_Matrix& matrix,
uint32_t dest_width,
int anti_alias,
int* pTextFlags) const {
return GetOrCreateGlyphCache()->LoadGlyphBitmap(this, glyph_index, bFontStyle,
matrix, dest_width,
anti_alias, pTextFlags);
}
const CFX_PathData* CFX_Font::LoadGlyphPath(uint32_t glyph_index,
uint32_t dest_width) const {
return GetOrCreateGlyphCache()->LoadGlyphPath(this, glyph_index, dest_width);
}
#if defined _SKIA_SUPPORT_ || _SKIA_SUPPORT_PATHS_
CFX_TypeFace* CFX_Font::GetDeviceCache() const {
return GetOrCreateGlyphCache()->GetDeviceCache(this);
}
#endif