diff options
Diffstat (limited to 'core/fxge/ge/cfx_font.cpp')
| -rw-r--r-- | core/fxge/ge/cfx_font.cpp | 667 |
1 files changed, 667 insertions, 0 deletions
diff --git a/core/fxge/ge/cfx_font.cpp b/core/fxge/ge/cfx_font.cpp new file mode 100644 index 0000000000..4aefec8d43 --- /dev/null +++ b/core/fxge/ge/cfx_font.cpp @@ -0,0 +1,667 @@ +// 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/include/fx_font.h" + +#include "core/fpdfapi/fpdf_font/include/cpdf_font.h" +#include "core/fxge/ge/fx_text_int.h" +#include "core/fxge/include/cfx_fontmgr.h" +#include "core/fxge/include/cfx_gemodule.h" +#include "core/fxge/include/cfx_pathdata.h" +#include "core/fxge/include/cfx_substfont.h" +#include "core/fxge/include/fx_freetype.h" + +#define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em) + +namespace { + +typedef struct { + FX_BOOL m_bCount; + int m_PointCount; + FX_PATHPOINT* m_pPoints; + int m_CurX; + int m_CurY; + FX_FLOAT m_CoordUnit; +} OUTLINE_PARAMS; + +#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_FileRead* pFile = static_cast<IFX_FileRead*>(stream->descriptor.pointer); + return pFile->ReadBlock(buffer, offset, count) ? count : 0; +} + +void FTStreamClose(FXFT_Stream stream) {} + +FX_BOOL LoadFileImp(FXFT_Library library, + FXFT_Face* Face, + IFX_FileRead* pFile, + int32_t faceIndex, + std::unique_ptr<FXFT_StreamRec>* stream) { + std::unique_ptr<FXFT_StreamRec> stream1(new FXFT_StreamRec()); + stream1->base = nullptr; + stream1->size = static_cast<unsigned long>(pFile->GetSize()); + stream1->pos = 0; + stream1->descriptor.pointer = pFile; + 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) { + if (param->m_PointCount >= 2 && + param->m_pPoints[param->m_PointCount - 2].m_Flag == FXPT_MOVETO && + param->m_pPoints[param->m_PointCount - 2].m_PointX == + param->m_pPoints[param->m_PointCount - 1].m_PointX && + param->m_pPoints[param->m_PointCount - 2].m_PointY == + param->m_pPoints[param->m_PointCount - 1].m_PointY) { + param->m_PointCount -= 2; + } + if (param->m_PointCount >= 4 && + param->m_pPoints[param->m_PointCount - 4].m_Flag == FXPT_MOVETO && + param->m_pPoints[param->m_PointCount - 3].m_Flag == FXPT_BEZIERTO && + param->m_pPoints[param->m_PointCount - 3].m_PointX == + param->m_pPoints[param->m_PointCount - 4].m_PointX && + param->m_pPoints[param->m_PointCount - 3].m_PointY == + param->m_pPoints[param->m_PointCount - 4].m_PointY && + param->m_pPoints[param->m_PointCount - 2].m_PointX == + param->m_pPoints[param->m_PointCount - 4].m_PointX && + param->m_pPoints[param->m_PointCount - 2].m_PointY == + param->m_pPoints[param->m_PointCount - 4].m_PointY && + param->m_pPoints[param->m_PointCount - 1].m_PointX == + param->m_pPoints[param->m_PointCount - 4].m_PointX && + param->m_pPoints[param->m_PointCount - 1].m_PointY == + param->m_pPoints[param->m_PointCount - 4].m_PointY) { + param->m_PointCount -= 4; + } +} + +int Outline_MoveTo(const FXFT_Vector* to, void* user) { + OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user; + if (!param->m_bCount) { + Outline_CheckEmptyContour(param); + param->m_pPoints[param->m_PointCount].m_PointX = to->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_PointY = to->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_Flag = FXPT_MOVETO; + param->m_CurX = to->x; + param->m_CurY = to->y; + if (param->m_PointCount) + param->m_pPoints[param->m_PointCount - 1].m_Flag |= FXPT_CLOSEFIGURE; + } + param->m_PointCount++; + return 0; +} + +int Outline_LineTo(const FXFT_Vector* to, void* user) { + OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user; + if (!param->m_bCount) { + param->m_pPoints[param->m_PointCount].m_PointX = to->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_PointY = to->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_Flag = FXPT_LINETO; + param->m_CurX = to->x; + param->m_CurY = to->y; + } + param->m_PointCount++; + return 0; +} + +int Outline_ConicTo(const FXFT_Vector* control, + const FXFT_Vector* to, + void* user) { + OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user; + if (!param->m_bCount) { + param->m_pPoints[param->m_PointCount].m_PointX = + (param->m_CurX + (control->x - param->m_CurX) * 2 / 3) / + param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_PointY = + (param->m_CurY + (control->y - param->m_CurY) * 2 / 3) / + param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_Flag = FXPT_BEZIERTO; + param->m_pPoints[param->m_PointCount + 1].m_PointX = + (control->x + (to->x - control->x) / 3) / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 1].m_PointY = + (control->y + (to->y - control->y) / 3) / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 1].m_Flag = FXPT_BEZIERTO; + param->m_pPoints[param->m_PointCount + 2].m_PointX = + to->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 2].m_PointY = + to->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 2].m_Flag = FXPT_BEZIERTO; + param->m_CurX = to->x; + param->m_CurY = to->y; + } + param->m_PointCount += 3; + return 0; +} + +int Outline_CubicTo(const FXFT_Vector* control1, + const FXFT_Vector* control2, + const FXFT_Vector* to, + void* user) { + OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user; + if (!param->m_bCount) { + param->m_pPoints[param->m_PointCount].m_PointX = + control1->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_PointY = + control1->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount].m_Flag = FXPT_BEZIERTO; + param->m_pPoints[param->m_PointCount + 1].m_PointX = + control2->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 1].m_PointY = + control2->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 1].m_Flag = FXPT_BEZIERTO; + param->m_pPoints[param->m_PointCount + 2].m_PointX = + to->x / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 2].m_PointY = + to->y / param->m_CoordUnit; + param->m_pPoints[param->m_PointCount + 2].m_Flag = FXPT_BEZIERTO; + param->m_CurX = to->x; + param->m_CurY = to->y; + } + param->m_PointCount += 3; + 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_bLogic(FALSE), + m_pOwnedStream(nullptr), +#endif // PDF_ENABLE_XFA + m_Face(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 +FX_BOOL CFX_Font::LoadClone(const CFX_Font* pFont) { + if (!pFont) + return FALSE; + + m_bLogic = TRUE; + if (pFont->m_pSubstFont) { + m_pSubstFont.reset(new 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; + } + if (pFont->m_OtfFontData.GetSize()) { + m_OtfFontData.AttachData(pFont->m_OtfFontData.GetBuffer(), + pFont->m_OtfFontData.GetSize()); + } + 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; + return TRUE; +} +#endif // PDF_ENABLE_XFA + +CFX_Font::~CFX_Font() { +#ifdef PDF_ENABLE_XFA + if (m_bLogic) { + m_OtfFontData.DetachBuffer(); + 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 + if (m_bEmbedded) + DeleteFace(); + else + CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face); + } +#ifdef PDF_ENABLE_XFA + FX_Free(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() { + FXFT_Done_Face(m_Face); + m_Face = nullptr; +} + +void CFX_Font::LoadSubst(const CFX_ByteString& face_name, + FX_BOOL bTrueType, + uint32_t flags, + int weight, + int italic_angle, + int CharsetCP, + FX_BOOL bVertical) { + m_bEmbedded = FALSE; + m_bVertical = bVertical; + m_pSubstFont.reset(new 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 +FX_BOOL CFX_Font::LoadFile(IFX_FileRead* pFile, + int nFaceIndex, + int* pFaceCount) { + 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; + + if (pFaceCount) + *pFaceCount = (int)m_Face->num_faces; + 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; +} + +FX_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; +} + +FX_BOOL CFX_Font::IsTTFont() const { + if (!m_Face) + return FALSE; + return 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)); +} + +FX_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(((FXFT_Face)m_Face)->glyph, &glyph); + if (error) + return FALSE; + FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox); + int pixel_size_x = ((FXFT_Face)m_Face)->size->metrics.x_ppem, + pixel_size_y = ((FXFT_Face)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; + } + if (bbox.top > FXFT_Get_Face_Ascender(m_Face)) + bbox.top = FXFT_Get_Face_Ascender(m_Face); + if (bbox.bottom < FXFT_Get_Face_Descender(m_Face)) + bbox.bottom = 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; +} + +FX_BOOL CFX_Font::IsItalic() const { + if (!m_Face) + return FALSE; + + FX_BOOL ret = FXFT_Is_Face_Italic(m_Face) == FXFT_STYLE_FLAG_ITALIC; + if (!ret) { + CFX_ByteString str(FXFT_Get_Face_Style_Name(m_Face)); + str.MakeLower(); + if (str.Find("italic") != -1) + ret = TRUE; + } + return ret; +} + +FX_BOOL CFX_Font::IsBold() const { + if (!m_Face) + return FALSE; + return FXFT_Is_Face_Bold(m_Face) == FXFT_STYLE_FLAG_BOLD; +} + +FX_BOOL CFX_Font::IsFixedWidth() const { + if (!m_Face) + return FALSE; + return FXFT_Is_Face_fixedwidth(m_Face); +} + +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 facename; + CFX_ByteString style = CFX_ByteString(FXFT_Get_Face_Style_Name(m_Face)); + facename = GetFamilyName(); + if (facename.IsEmpty()) + facename = "Untitled"; + if (!style.IsEmpty() && style != "Regular") + facename += " " + style; + return facename; + } + return m_pSubstFont->m_Family; +} + +FX_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; +} + +int CFX_Font::GetHeight() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_Height(m_Face)); +} + +int CFX_Font::GetMaxAdvanceWidth() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_MaxAdvanceWidth(m_Face)); +} + +int CFX_Font::GetULPos() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_UnderLinePosition(m_Face)); +} + +int CFX_Font::GetULthickness() const { + if (!m_Face) + return 0; + + return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), + FXFT_Get_Face_UnderLineThickness(m_Face)); +} + +void CFX_Font::AdjustMMParams(int glyph_index, int dest_width, int weight) { + 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::LoadGlyphPath(uint32_t glyph_index, int dest_width) { + 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 == FXFONT_SHIFTJIS_CHARSET) + 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; + params.m_bCount = TRUE; + params.m_PointCount = 0; + FXFT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face), &funcs, ¶ms); + if (params.m_PointCount == 0) + return nullptr; + CFX_PathData* pPath = new CFX_PathData; + pPath->SetPointCount(params.m_PointCount); + params.m_bCount = FALSE; + params.m_PointCount = 0; + params.m_pPoints = pPath->GetPoints(); + params.m_CurX = params.m_CurY = 0; + params.m_CoordUnit = 64 * 64.0; + FXFT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face), &funcs, ¶ms); + Outline_CheckEmptyContour(¶ms); + pPath->TrimPoints(params.m_PointCount); + if (params.m_PointCount) + pPath->GetPoints()[params.m_PointCount - 1].m_Flag |= FXPT_CLOSEFIGURE; + return pPath; +} |