| // 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/fxcrt/unowned_ptr.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_path.h" |
| #include "core/fxge/cfx_substfont.h" |
| #include "core/fxge/fx_font.h" |
| #include "core/fxge/scoped_font_transform.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/cxx17_backports.h" |
| #include "third_party/base/span.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 { |
| UnownedPtr<CFX_Path> m_pPath; |
| int m_CurX; |
| int m_CurY; |
| float m_CoordUnit; |
| }; |
| |
| #ifdef PDF_ENABLE_XFA |
| unsigned long FTStreamRead(FXFT_StreamRec* 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_StreamRec* stream) {} |
| #endif // PDF_ENABLE_XFA |
| |
| void Outline_CheckEmptyContour(OUTLINE_PARAMS* param) { |
| size_t size; |
| { |
| pdfium::span<const CFX_Path::Point> points = param->m_pPath->GetPoints(); |
| size = points.size(); |
| |
| if (size >= 2 && |
| points[size - 2].IsTypeAndOpen(CFX_Path::Point::Type::kMove) && |
| points[size - 2].m_Point == points[size - 1].m_Point) { |
| size -= 2; |
| } |
| if (size >= 4 && |
| points[size - 4].IsTypeAndOpen(CFX_Path::Point::Type::kMove) && |
| points[size - 3].IsTypeAndOpen(CFX_Path::Point::Type::kBezier) && |
| 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; |
| } |
| } |
| // Only safe after |points| has been destroyed. |
| param->m_pPath->GetPoints().resize(size); |
| } |
| |
| int Outline_MoveTo(const FT_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), |
| CFX_Path::Point::Type::kMove); |
| |
| param->m_CurX = to->x; |
| param->m_CurY = to->y; |
| return 0; |
| } |
| |
| int Outline_LineTo(const FT_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), |
| CFX_Path::Point::Type::kLine); |
| |
| param->m_CurX = to->x; |
| param->m_CurY = to->y; |
| return 0; |
| } |
| |
| int Outline_ConicTo(const FT_Vector* control, const FT_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), |
| CFX_Path::Point::Type::kBezier); |
| |
| 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), |
| CFX_Path::Point::Type::kBezier); |
| |
| param->m_pPath->AppendPoint( |
| CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit), |
| CFX_Path::Point::Type::kBezier); |
| |
| param->m_CurX = to->x; |
| param->m_CurY = to->y; |
| return 0; |
| } |
| |
| int Outline_CubicTo(const FT_Vector* control1, |
| const FT_Vector* control2, |
| const FT_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), |
| CFX_Path::Point::Type::kBezier); |
| |
| param->m_pPath->AppendPoint(CFX_PointF(control2->x / param->m_CoordUnit, |
| control2->y / param->m_CoordUnit), |
| CFX_Path::Point::Type::kBezier); |
| |
| param->m_pPath->AppendPoint( |
| CFX_PointF(to->x / param->m_CoordUnit, to->y / param->m_CoordUnit), |
| CFX_Path::Point::Type::kBezier); |
| |
| param->m_CurX = to->x; |
| param->m_CurY = to->y; |
| return 0; |
| } |
| |
| bool ShouldAppendStyle(const ByteString& style) { |
| return !style.IsEmpty() && style != "Regular"; |
| } |
| |
| constexpr int8_t kAngleSkew[] = { |
| -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, |
| }; |
| |
| constexpr uint8_t kWeightPow[] = { |
| 0, 6, 12, 14, 16, 18, 22, 24, 28, 30, 32, 34, 36, 38, 40, |
| 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, |
| 70, 72, 72, 74, 74, 74, 76, 76, 76, 78, 78, 78, 80, 80, 80, |
| 82, 82, 82, 84, 84, 84, 84, 86, 86, 86, 88, 88, 88, 88, 90, |
| 90, 90, 90, 92, 92, 92, 92, 94, 94, 94, 94, 96, 96, 96, 96, |
| 96, 98, 98, 98, 98, 100, 100, 100, 100, 100, 102, 102, 102, 102, 102, |
| 104, 104, 104, 104, 104, 106, 106, 106, 106, 106, |
| }; |
| |
| constexpr uint8_t kWeightPow11[] = { |
| 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, |
| }; |
| |
| constexpr uint8_t kWeightPowShiftJis[] = { |
| 0, 0, 2, 4, 6, 8, 10, 14, 16, 20, 22, 26, 28, 32, 34, |
| 38, 42, 44, 48, 52, 56, 60, 64, 66, 70, 74, 78, 82, 86, 90, |
| 96, 96, 96, 96, 98, 98, 98, 100, 100, 100, 100, 102, 102, 102, 102, |
| 104, 104, 104, 104, 104, 106, 106, 106, 106, 106, 108, 108, 108, 108, 108, |
| 110, 110, 110, 110, 110, 112, 112, 112, 112, 112, 112, 114, 114, 114, 114, |
| 114, 114, 114, 116, 116, 116, 116, 116, 116, 116, 118, 118, 118, 118, 118, |
| 118, 118, 120, 120, 120, 120, 120, 120, 120, 120, |
| }; |
| |
| constexpr size_t kWeightPowArraySize = 100; |
| static_assert(kWeightPowArraySize == pdfium::size(kWeightPow), "Wrong size"); |
| static_assert(kWeightPowArraySize == pdfium::size(kWeightPow11), "Wrong size"); |
| static_assert(kWeightPowArraySize == pdfium::size(kWeightPowShiftJis), |
| "Wrong size"); |
| |
| } // namespace |
| |
| const CFX_Font::CharsetFontMap CFX_Font::kDefaultTTFMap[] = { |
| {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 defined(OS_WIN) |
| {FX_CHARSET_MSWin_EasternEuropean, "Tahoma"}, |
| #else |
| {FX_CHARSET_MSWin_EasternEuropean, "Arial"}, |
| #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) { |
| for (size_t i = 0; i < pdfium::size(kDefaultTTFMap) - 1; ++i) { |
| if (nCharset == static_cast<uint8_t>(kDefaultTTFMap[i].charset)) |
| return kDefaultTTFMap[i].fontname; |
| } |
| 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; |
| |
| int CFX_Font::GetSubstFontItalicAngle() const { |
| CFX_SubstFont* subst_font = GetSubstFont(); |
| return subst_font ? subst_font->m_ItalicAngle : 0; |
| } |
| |
| #ifdef PDF_ENABLE_XFA |
| bool CFX_Font::LoadFile(RetainPtr<IFX_SeekableReadStream> pFile, |
| int nFaceIndex) { |
| m_bEmbedded = false; |
| |
| auto pStreamRec = std::make_unique<FXFT_StreamRec>(); |
| pStreamRec->base = nullptr; |
| pStreamRec->size = static_cast<unsigned long>(pFile->GetSize()); |
| pStreamRec->pos = 0; |
| pStreamRec->descriptor.pointer = static_cast<void*>(pFile.Get()); |
| pStreamRec->close = FTStreamClose; |
| pStreamRec->read = FTStreamRead; |
| |
| FT_Open_Args args; |
| args.flags = FT_OPEN_STREAM; |
| args.stream = pStreamRec.get(); |
| |
| m_Face = CFX_Face::Open(CFX_GEModule::Get()->GetFontMgr()->GetFTLibrary(), |
| &args, nFaceIndex); |
| if (!m_Face) |
| return false; |
| |
| m_pOwnedFile = std::move(pFile); |
| m_pOwnedStreamRec = std::move(pStreamRec); |
| FT_Set_Pixel_Sizes(m_Face->GetRec(), 0, 64); |
| return true; |
| } |
| |
| #if !defined(OS_WIN) |
| void CFX_Font::SetFace(RetainPtr<CFX_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. |
| m_Face.Reset(); |
| |
| #if defined(OS_APPLE) |
| ReleasePlatformResource(); |
| #endif |
| } |
| |
| 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 = std::make_unique<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->GetRec()), |
| FXFT_Get_Face_Stream_Size(m_Face->GetRec())}; |
| } |
| } |
| |
| int 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 = |
| FT_Load_Glyph(m_Face->GetRec(), glyph_index, |
| FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| if (err) |
| return 0; |
| |
| int horiAdvance = FXFT_Get_Glyph_HoriAdvance(m_Face->GetRec()); |
| if (horiAdvance < kThousandthMinInt || horiAdvance > kThousandthMaxInt) |
| return 0; |
| |
| return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()), horiAdvance); |
| } |
| |
| bool CFX_Font::LoadEmbedded(pdfium::span<const uint8_t> src_span, |
| bool bForceAsVertical) { |
| if (bForceAsVertical) |
| m_bVertical = true; |
| m_FontDataAllocation = std::vector<uint8_t, FxAllocAllocator<uint8_t>>( |
| src_span.begin(), src_span.end()); |
| m_Face = CFX_GEModule::Get()->GetFontMgr()->NewFixedFace( |
| nullptr, m_FontDataAllocation, 0); |
| m_bEmbedded = true; |
| m_FontData = m_FontDataAllocation; |
| return !!m_Face; |
| } |
| |
| bool CFX_Font::IsTTFont() const { |
| return m_Face && FXFT_Is_Face_TT_OT(m_Face->GetRec()) == FT_FACE_FLAG_SFNT; |
| } |
| |
| int CFX_Font::GetAscent() const { |
| if (!m_Face) |
| return 0; |
| |
| int ascender = FXFT_Get_Face_Ascender(m_Face->GetRec()); |
| if (ascender < kThousandthMinInt || ascender > kThousandthMaxInt) |
| return 0; |
| |
| return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()), ascender); |
| } |
| |
| int CFX_Font::GetDescent() const { |
| if (!m_Face) |
| return 0; |
| |
| int descender = FXFT_Get_Face_Descender(m_Face->GetRec()); |
| if (descender < kThousandthMinInt || descender > kThousandthMaxInt) |
| return 0; |
| |
| return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()), descender); |
| } |
| |
| Optional<FX_RECT> CFX_Font::GetGlyphBBox(uint32_t glyph_index) { |
| if (!m_Face) |
| return pdfium::nullopt; |
| |
| FX_RECT result; |
| if (FXFT_Is_Face_Tricky(m_Face->GetRec())) { |
| int error = FT_Set_Char_Size(m_Face->GetRec(), 0, 1000 * 64, 72, 72); |
| if (error) |
| return pdfium::nullopt; |
| |
| error = FT_Load_Glyph(m_Face->GetRec(), glyph_index, |
| FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| if (error) |
| return pdfium::nullopt; |
| |
| FT_Glyph glyph; |
| error = FT_Get_Glyph(m_Face->GetRec()->glyph, &glyph); |
| if (error) |
| return pdfium::nullopt; |
| |
| FT_BBox cbox; |
| FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &cbox); |
| int pixel_size_x = m_Face->GetRec()->size->metrics.x_ppem; |
| int pixel_size_y = m_Face->GetRec()->size->metrics.y_ppem; |
| if (pixel_size_x == 0 || pixel_size_y == 0) { |
| result.left = cbox.xMin; |
| result.right = cbox.xMax; |
| result.top = cbox.yMax; |
| result.bottom = cbox.yMin; |
| } else { |
| result.left = cbox.xMin * 1000 / pixel_size_x; |
| result.right = cbox.xMax * 1000 / pixel_size_x; |
| result.top = cbox.yMax * 1000 / pixel_size_y; |
| result.bottom = cbox.yMin * 1000 / pixel_size_y; |
| } |
| result.top = std::min( |
| result.top, |
| static_cast<int32_t>(FXFT_Get_Face_Ascender(m_Face->GetRec()))); |
| result.bottom = std::max( |
| result.bottom, |
| static_cast<int32_t>(FXFT_Get_Face_Descender(m_Face->GetRec()))); |
| FT_Done_Glyph(glyph); |
| if (FT_Set_Pixel_Sizes(m_Face->GetRec(), 0, 64) != 0) |
| return pdfium::nullopt; |
| return result; |
| } |
| constexpr int kFlag = FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; |
| if (FT_Load_Glyph(m_Face->GetRec(), glyph_index, kFlag) != 0) |
| return pdfium::nullopt; |
| int em = FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()); |
| if (em == 0) { |
| result.left = FXFT_Get_Glyph_HoriBearingX(m_Face->GetRec()); |
| result.bottom = FXFT_Get_Glyph_HoriBearingY(m_Face->GetRec()); |
| result.top = result.bottom - FXFT_Get_Glyph_Height(m_Face->GetRec()); |
| result.right = result.left + FXFT_Get_Glyph_Width(m_Face->GetRec()); |
| } else { |
| result.left = FXFT_Get_Glyph_HoriBearingX(m_Face->GetRec()) * 1000 / em; |
| result.top = (FXFT_Get_Glyph_HoriBearingY(m_Face->GetRec()) - |
| FXFT_Get_Glyph_Height(m_Face->GetRec())) * |
| 1000 / em; |
| result.right = (FXFT_Get_Glyph_HoriBearingX(m_Face->GetRec()) + |
| FXFT_Get_Glyph_Width(m_Face->GetRec())) * |
| 1000 / em; |
| result.bottom = (FXFT_Get_Glyph_HoriBearingY(m_Face->GetRec())) * 1000 / em; |
| } |
| return result; |
| } |
| |
| bool CFX_Font::IsItalic() const { |
| if (!m_Face) |
| return false; |
| if (FXFT_Is_Face_Italic(m_Face->GetRec()) == FT_STYLE_FLAG_ITALIC) |
| return true; |
| |
| ByteString str(FXFT_Get_Face_Style_Name(m_Face->GetRec())); |
| str.MakeLower(); |
| return str.Contains("italic"); |
| } |
| |
| bool CFX_Font::IsBold() const { |
| return m_Face && FXFT_Is_Face_Bold(m_Face->GetRec()) == FT_STYLE_FLAG_BOLD; |
| } |
| |
| bool CFX_Font::IsFixedWidth() const { |
| return m_Face && FXFT_Is_Face_fixedwidth(m_Face->GetRec()) != 0; |
| } |
| |
| #if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_) |
| bool CFX_Font::IsSubstFontBold() const { |
| CFX_SubstFont* subst_font = GetSubstFont(); |
| return subst_font && subst_font->GetOriginalWeight() >= FXFONT_FW_BOLD; |
| } |
| #endif |
| |
| ByteString CFX_Font::GetPsName() const { |
| if (!m_Face) |
| return ByteString(); |
| |
| ByteString psName = FT_Get_Postscript_Name(m_Face->GetRec()); |
| 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->GetRec())); |
| 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->GetRec())); |
| ByteString facename = GetFamilyNameOrUntitled(); |
| if (ShouldAppendStyle(style)) |
| facename += " " + style; |
| return facename; |
| } |
| return m_pSubstFont->m_Family; |
| } |
| |
| ByteString CFX_Font::GetBaseFontName() const { |
| ByteString psname = GetPsName(); |
| if (!psname.IsEmpty() && psname != kUntitledFontName) |
| return psname; |
| if (m_Face) { |
| ByteString style = ByteString(FXFT_Get_Face_Style_Name(m_Face->GetRec())); |
| ByteString facename = GetFamilyNameOrUntitled(); |
| if (IsTTFont()) |
| facename.Remove(' '); |
| if (ShouldAppendStyle(style)) |
| facename += (IsTTFont() ? "," : " ") + style; |
| return facename; |
| } |
| if (m_pSubstFont) |
| return m_pSubstFont->m_Family; |
| return ByteString(); |
| } |
| |
| Optional<FX_RECT> CFX_Font::GetBBox() { |
| if (!m_Face) |
| return pdfium::nullopt; |
| |
| FX_RECT result(FXFT_Get_Face_xMin(m_Face->GetRec()), |
| FXFT_Get_Face_yMin(m_Face->GetRec()), |
| FXFT_Get_Face_xMax(m_Face->GetRec()), |
| FXFT_Get_Face_yMax(m_Face->GetRec())); |
| int em = FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()); |
| if (em != 0) { |
| result.left = (result.left * 1000) / em; |
| result.top = (result.top * 1000) / em; |
| result.right = (result.right * 1000) / em; |
| result.bottom = (result.bottom * 1000) / em; |
| } |
| return result; |
| } |
| |
| 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 { |
| DCHECK(dest_width >= 0); |
| FXFT_MM_VarPtr pMasters = nullptr; |
| FT_Get_MM_Var(m_Face->GetRec(), &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; |
| FT_Set_MM_Design_Coordinates(m_Face->GetRec(), 2, coords); |
| FT_Load_Glyph(m_Face->GetRec(), glyph_index, |
| FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| int min_width = FXFT_Get_Glyph_HoriAdvance(m_Face->GetRec()) * 1000 / |
| FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()); |
| coords[1] = max_param; |
| FT_Set_MM_Design_Coordinates(m_Face->GetRec(), 2, coords); |
| FT_Load_Glyph(m_Face->GetRec(), glyph_index, |
| FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); |
| int max_width = FXFT_Get_Glyph_HoriAdvance(m_Face->GetRec()) * 1000 / |
| FXFT_Get_Face_UnitsPerEM(m_Face->GetRec()); |
| if (max_width == min_width) { |
| FXFT_Free(m_Face->GetRec(), 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->GetRec(), pMasters); |
| FT_Set_MM_Design_Coordinates(m_Face->GetRec(), 2, coords); |
| } |
| |
| std::unique_ptr<CFX_Path> CFX_Font::LoadGlyphPathImpl(uint32_t glyph_index, |
| int dest_width) const { |
| if (!m_Face) |
| return nullptr; |
| |
| FT_Set_Pixel_Sizes(m_Face->GetRec(), 0, 64); |
| FT_Matrix ft_matrix = {65536, 0, 0, 65536}; |
| if (m_pSubstFont) { |
| if (m_pSubstFont->m_ItalicAngle) { |
| int skew = GetSkewFromAngle(m_pSubstFont->m_ItalicAngle); |
| 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, &ft_matrix); |
| int load_flags = FT_LOAD_NO_BITMAP; |
| if (!(m_Face->GetRec()->face_flags & FT_FACE_FLAG_SFNT) || |
| !FT_IS_TRICKY(m_Face->GetRec())) |
| load_flags |= FT_LOAD_NO_HINTING; |
| if (FT_Load_Glyph(m_Face->GetRec(), glyph_index, load_flags)) |
| return nullptr; |
| if (m_pSubstFont && !m_pSubstFont->m_bFlagMM && |
| m_pSubstFont->m_Weight > 400) { |
| uint32_t index = std::min<uint32_t>((m_pSubstFont->m_Weight - 400) / 10, |
| kWeightPowArraySize - 1); |
| int level; |
| if (m_pSubstFont->m_Charset == FX_CHARSET_ShiftJIS) |
| level = kWeightPowShiftJis[index] * 65536 / 36655; |
| else |
| level = kWeightPow[index]; |
| FT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face->GetRec()), level); |
| } |
| |
| FT_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; |
| |
| auto pPath = std::make_unique<CFX_Path>(); |
| OUTLINE_PARAMS params; |
| params.m_pPath = pPath.get(); |
| params.m_CurX = params.m_CurY = 0; |
| params.m_CoordUnit = 64 * 64.0; |
| |
| FT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face->GetRec()), &funcs, |
| ¶ms); |
| if (pPath->GetPoints().empty()) |
| return nullptr; |
| |
| Outline_CheckEmptyContour(¶ms); |
| pPath->ClosePath(); |
| return pPath; |
| } |
| |
| const CFX_GlyphBitmap* CFX_Font::LoadGlyphBitmap( |
| uint32_t glyph_index, |
| bool bFontStyle, |
| const CFX_Matrix& matrix, |
| int dest_width, |
| int anti_alias, |
| CFX_TextRenderOptions* text_options) const { |
| return GetOrCreateGlyphCache()->LoadGlyphBitmap(this, glyph_index, bFontStyle, |
| matrix, dest_width, |
| anti_alias, text_options); |
| } |
| |
| const CFX_Path* CFX_Font::LoadGlyphPath(uint32_t glyph_index, |
| int dest_width) const { |
| return GetOrCreateGlyphCache()->LoadGlyphPath(this, glyph_index, dest_width); |
| } |
| |
| // static |
| int CFX_Font::GetWeightLevel(int charset, size_t index) { |
| if (index >= kWeightPowArraySize) |
| return -1; |
| |
| if (charset == FX_CHARSET_ShiftJIS) |
| return kWeightPowShiftJis[index]; |
| return kWeightPow11[index]; |
| } |
| |
| // static |
| int CFX_Font::GetSkewFromAngle(int angle) { |
| // |angle| is non-positive so |-angle| is used as the index. Need to make sure |
| // |angle| != INT_MIN since -INT_MIN is undefined. |
| if (angle > 0 || angle == std::numeric_limits<int>::min() || |
| static_cast<size_t>(-angle) >= pdfium::size(kAngleSkew)) { |
| return -58; |
| } |
| return kAngleSkew[-angle]; |
| } |
| |
| #if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_) |
| CFX_TypeFace* CFX_Font::GetDeviceCache() const { |
| return GetOrCreateGlyphCache()->GetDeviceCache(this); |
| } |
| #endif |