| // 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/fx_freetype.h" |
| |
| #define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em) |
| |
| namespace { |
| |
| #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); |
| } |
| |
| } // namespace |
| |
| CFX_Font::CFX_Font() |
| #ifdef PDF_ENABLE_XFA |
| : m_bLogic(FALSE), |
| m_pOwnedStream(nullptr), |
| m_Face(nullptr), |
| #else |
| : m_Face(nullptr), |
| #endif // PDF_ENABLE_XFA |
| 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)); |
| } |