diff options
Diffstat (limited to 'core/fxge/cfx_font.cpp')
| -rw-r--r-- | core/fxge/cfx_font.cpp | 657 |
1 files changed, 657 insertions, 0 deletions
diff --git a/core/fxge/cfx_font.cpp b/core/fxge/cfx_font.cpp new file mode 100644 index 0000000000..a8e271dd9a --- /dev/null +++ b/core/fxge/cfx_font.cpp @@ -0,0 +1,657 @@ +// 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/fx_font.h" + +#include <algorithm> +#include <limits> +#include <memory> +#include <utility> +#include <vector> + +#include "core/fpdfapi/font/cpdf_font.h" +#include "core/fxcrt/fx_codepage.h" +#include "core/fxge/cfx_facecache.h" +#include "core/fxge/cfx_fontcache.h" +#include "core/fxge/cfx_fontmgr.h" +#include "core/fxge/cfx_gemodule.h" +#include "core/fxge/cfx_pathdata.h" +#include "core/fxge/cfx_substfont.h" +#include "core/fxge/fx_freetype.h" +#include "core/fxge/fx_text_int.h" +#include "third_party/base/ptr_util.h" + +#define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em) + +namespace { + +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->ReadBlock(buffer, offset, count) ? count : 0; +} + +void FTStreamClose(FXFT_Stream stream) {} + +bool LoadFileImp(FXFT_Library library, + FXFT_Face* Face, + const CFX_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(); + if (FXFT_Open_Face(library, &args, faceIndex, Face)) + return false; + if (stream) + *stream = std::move(stream1); + return true; +} +#endif // PDF_ENABLE_XFA + +FXFT_Face FT_LoadFont(const uint8_t* pData, int size) { + return CFX_GEModule::Get()->GetFontMgr()->GetFixedFace(pData, size, 0); +} + +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; +} + +} // 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, +}; + +CFX_Font::CFX_Font() + : +#ifdef PDF_ENABLE_XFA + m_bShallowCopy(false), + m_pOwnedStream(nullptr), +#endif // PDF_ENABLE_XFA + m_Face(nullptr), + m_FaceCache(nullptr), + m_pFontData(nullptr), + m_pGsubData(nullptr), + m_dwSize(0), +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + m_pPlatformFont(nullptr), +#endif + m_bEmbedded(false), + m_bVertical(false) { +} + +#ifdef PDF_ENABLE_XFA +bool CFX_Font::LoadClone(const CFX_Font* pFont) { + if (!pFont) + return false; + + m_bShallowCopy = true; + if (pFont->m_pSubstFont) { + m_pSubstFont = pdfium::MakeUnique<CFX_SubstFont>(); + m_pSubstFont->m_Charset = pFont->m_pSubstFont->m_Charset; + m_pSubstFont->m_SubstFlags = pFont->m_pSubstFont->m_SubstFlags; + m_pSubstFont->m_Weight = pFont->m_pSubstFont->m_Weight; + m_pSubstFont->m_Family = pFont->m_pSubstFont->m_Family; + m_pSubstFont->m_ItalicAngle = pFont->m_pSubstFont->m_ItalicAngle; + } + m_Face = pFont->m_Face; + m_bEmbedded = pFont->m_bEmbedded; + m_bVertical = pFont->m_bVertical; + m_dwSize = pFont->m_dwSize; + m_pFontData = pFont->m_pFontData; + m_pGsubData = pFont->m_pGsubData; +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ + m_pPlatformFont = pFont->m_pPlatformFont; +#endif + m_pOwnedStream = pFont->m_pOwnedStream; + m_FaceCache = pFont->GetFaceCache(); + return true; +} + +void CFX_Font::SetFace(FXFT_Face face) { + ClearFaceCache(); + m_Face = face; +} + +#endif // PDF_ENABLE_XFA + +CFX_Font::~CFX_Font() { +#ifdef PDF_ENABLE_XFA + if (m_bShallowCopy) + return; +#endif // PDF_ENABLE_XFA + if (m_Face) { +#ifndef PDF_ENABLE_XFA + if (FXFT_Get_Face_External_Stream(m_Face)) { + FXFT_Clear_Face_External_Stream(m_Face); + } +#endif // PDF_ENABLE_XFA + DeleteFace(); + } +#ifdef PDF_ENABLE_XFA + delete m_pOwnedStream; +#endif // PDF_ENABLE_XFA + FX_Free(m_pGsubData); +#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ && !defined _SKIA_SUPPORT_ + ReleasePlatformResource(); +#endif +} + +void CFX_Font::DeleteFace() { + ClearFaceCache(); + if (m_bEmbedded) + FXFT_Done_Face(m_Face); + else + CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face); + m_Face = nullptr; +} + +void CFX_Font::LoadSubst(const CFX_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_pFontData = FXFT_Get_Face_Stream_Base(m_Face); + m_dwSize = FXFT_Get_Face_Stream_Size(m_Face); + } +} + +#ifdef PDF_ENABLE_XFA +bool CFX_Font::LoadFile(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile, + int nFaceIndex) { + m_bEmbedded = false; + + CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr(); + pFontMgr->InitFTLibrary(); + + FXFT_Library library = pFontMgr->GetFTLibrary(); + std::unique_ptr<FXFT_StreamRec> stream; + if (!LoadFileImp(library, &m_Face, pFile, nFaceIndex, &stream)) + return false; + + m_pOwnedStream = stream.release(); + FXFT_Set_Pixel_Sizes(m_Face, 0, 64); + return true; +} +#endif // PDF_ENABLE_XFA + +int CFX_Font::GetGlyphWidth(uint32_t glyph_index) { + if (!m_Face) + return 0; + if (m_pSubstFont && (m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM)) + AdjustMMParams(glyph_index, 0, 0); + int err = FXFT_Load_Glyph( + m_Face, glyph_index, + FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); + if (err) + return 0; + + int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Glyph_HoriAdvance(m_Face)); + return width; +} + +bool CFX_Font::LoadEmbedded(const uint8_t* data, uint32_t size) { + std::vector<uint8_t> temp(data, data + size); + m_pFontDataAllocation.swap(temp); + m_Face = FT_LoadFont(m_pFontDataAllocation.data(), size); + m_pFontData = m_pFontDataAllocation.data(); + m_bEmbedded = true; + m_dwSize = size; + return !!m_Face; +} + +bool CFX_Font::IsTTFont() const { + return m_Face && FXFT_Is_Face_TT_OT(m_Face) == FXFT_FACE_FLAG_SFNT; +} + +int CFX_Font::GetAscent() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_Ascender(m_Face)); +} + +int CFX_Font::GetDescent() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_Descender(m_Face)); +} + +bool CFX_Font::GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox) { + if (!m_Face) + return false; + + if (FXFT_Is_Face_Tricky(m_Face)) { + int error = FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72); + if (error) + return false; + + error = FXFT_Load_Glyph(m_Face, 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) { + bbox.left = cbox.xMin; + bbox.right = cbox.xMax; + bbox.top = cbox.yMax; + bbox.bottom = cbox.yMin; + } else { + bbox.left = cbox.xMin * 1000 / pixel_size_x; + bbox.right = cbox.xMax * 1000 / pixel_size_x; + bbox.top = cbox.yMax * 1000 / pixel_size_y; + bbox.bottom = cbox.yMin * 1000 / pixel_size_y; + } + bbox.top = std::min(bbox.top, + static_cast<int32_t>(FXFT_Get_Face_Ascender(m_Face))); + bbox.bottom = std::max( + bbox.bottom, static_cast<int32_t>(FXFT_Get_Face_Descender(m_Face))); + FT_Done_Glyph(glyph); + return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0; + } + if (FXFT_Load_Glyph( + m_Face, glyph_index, + FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) { + return false; + } + int em = FXFT_Get_Face_UnitsPerEM(m_Face); + if (em == 0) { + bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face); + bbox.bottom = FXFT_Get_Glyph_HoriBearingY(m_Face); + bbox.top = bbox.bottom - FXFT_Get_Glyph_Height(m_Face); + bbox.right = bbox.left + FXFT_Get_Glyph_Width(m_Face); + } else { + bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face) * 1000 / em; + bbox.top = + (FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face)) * + 1000 / em; + bbox.right = + (FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face)) * + 1000 / em; + bbox.bottom = (FXFT_Get_Glyph_HoriBearingY(m_Face)) * 1000 / em; + } + return true; +} + +bool CFX_Font::IsItalic() const { + if (!m_Face) + return false; + if (FXFT_Is_Face_Italic(m_Face) == FXFT_STYLE_FLAG_ITALIC) + return true; + + CFX_ByteString str(FXFT_Get_Face_Style_Name(m_Face)); + str.MakeLower(); + return str.Find("italic") != -1; +} + +bool CFX_Font::IsBold() const { + return m_Face && FXFT_Is_Face_Bold(m_Face) == FXFT_STYLE_FLAG_BOLD; +} + +bool CFX_Font::IsFixedWidth() const { + return m_Face && FXFT_Is_Face_fixedwidth(m_Face) != 0; +} + +CFX_ByteString CFX_Font::GetPsName() const { + if (!m_Face) + return CFX_ByteString(); + + CFX_ByteString psName = FXFT_Get_Postscript_Name(m_Face); + if (psName.IsEmpty()) + psName = "Untitled"; + return psName; +} + +CFX_ByteString CFX_Font::GetFamilyName() const { + if (!m_Face && !m_pSubstFont) + return CFX_ByteString(); + if (m_Face) + return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face)); + + return m_pSubstFont->m_Family; +} + +CFX_ByteString CFX_Font::GetFaceName() const { + if (!m_Face && !m_pSubstFont) + return CFX_ByteString(); + if (m_Face) { + CFX_ByteString style = CFX_ByteString(FXFT_Get_Face_Style_Name(m_Face)); + CFX_ByteString facename = GetFamilyName(); + if (facename.IsEmpty()) + facename = "Untitled"; + if (!style.IsEmpty() && style != "Regular") + facename += " " + style; + return facename; + } + return m_pSubstFont->m_Family; +} + +bool CFX_Font::GetBBox(FX_RECT& bbox) { + if (!m_Face) + return false; + + int em = FXFT_Get_Face_UnitsPerEM(m_Face); + if (em == 0) { + bbox.left = FXFT_Get_Face_xMin(m_Face); + bbox.bottom = FXFT_Get_Face_yMax(m_Face); + bbox.top = FXFT_Get_Face_yMin(m_Face); + bbox.right = FXFT_Get_Face_xMax(m_Face); + } else { + bbox.left = FXFT_Get_Face_xMin(m_Face) * 1000 / em; + bbox.top = FXFT_Get_Face_yMin(m_Face) * 1000 / em; + bbox.right = FXFT_Get_Face_xMax(m_Face) * 1000 / em; + bbox.bottom = FXFT_Get_Face_yMax(m_Face) * 1000 / em; + } + return true; +} + +CFX_FaceCache* CFX_Font::GetFaceCache() const { + if (!m_FaceCache) + m_FaceCache = CFX_GEModule::Get()->GetFontCache()->GetCachedFace(this); + return m_FaceCache.Get(); +} + +void CFX_Font::ClearFaceCache() { + if (!m_FaceCache) + return; + + m_FaceCache = nullptr; + CFX_GEModule::Get()->GetFontCache()->ReleaseCachedFace(this); +} + +void CFX_Font::AdjustMMParams(int glyph_index, + int dest_width, + int weight) const { + FXFT_MM_Var pMasters = nullptr; + FXFT_Get_MM_Var(m_Face, &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, 2, coords); + FXFT_Load_Glyph(m_Face, glyph_index, + FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); + int min_width = FXFT_Get_Glyph_HoriAdvance(m_Face) * 1000 / + FXFT_Get_Face_UnitsPerEM(m_Face); + coords[1] = max_param; + FXFT_Set_MM_Design_Coordinates(m_Face, 2, coords); + FXFT_Load_Glyph(m_Face, glyph_index, + FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH); + int max_width = FXFT_Get_Glyph_HoriAdvance(m_Face) * 1000 / + FXFT_Get_Face_UnitsPerEM(m_Face); + if (max_width == min_width) { + FXFT_Free(m_Face, 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, pMasters); + FXFT_Set_MM_Design_Coordinates(m_Face, 2, coords); +} + +CFX_PathData* CFX_Font::LoadGlyphPathImpl(uint32_t glyph_index, + int dest_width) const { + if (!m_Face) + return nullptr; + FXFT_Set_Pixel_Sizes(m_Face, 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_SubstFlags & FXFONT_SUBST_MM) + AdjustMMParams(glyph_index, dest_width, m_pSubstFont->m_Weight); + } + ScopedFontTransform scoped_transform(m_Face, &ft_matrix); + int load_flags = FXFT_LOAD_NO_BITMAP; + if (!(m_Face->face_flags & FT_FACE_FLAG_SFNT) || !FT_IS_TRICKY(m_Face)) + load_flags |= FT_LOAD_NO_HINTING; + if (FXFT_Load_Glyph(m_Face, glyph_index, load_flags)) + return nullptr; + if (m_pSubstFont && !(m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM) && + 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), 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), &funcs, ¶ms); + if (pPath->GetPoints().empty()) + return nullptr; + + Outline_CheckEmptyContour(¶ms); + pPath->ClosePath(); + + return pPath.release(); +} + +const CFX_GlyphBitmap* CFX_Font::LoadGlyphBitmap(uint32_t glyph_index, + bool bFontStyle, + const CFX_Matrix* pMatrix, + int dest_width, + int anti_alias, + int& text_flags) const { + return GetFaceCache()->LoadGlyphBitmap(this, glyph_index, bFontStyle, pMatrix, + dest_width, anti_alias, text_flags); +} + +const CFX_PathData* CFX_Font::LoadGlyphPath(uint32_t glyph_index, + int dest_width) const { + return GetFaceCache()->LoadGlyphPath(this, glyph_index, dest_width); +} + +#if defined _SKIA_SUPPORT_ || _SKIA_SUPPORT_PATHS_ +CFX_TypeFace* CFX_Font::GetDeviceCache() const { + return GetFaceCache()->GetDeviceCache(this); +} +#endif |