// Copyright 2017 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. #include <utility> #include "core/fpdfapi/cpdf_modulemgr.h" #include "core/fpdfapi/font/cpdf_font.h" #include "core/fpdfapi/font/cpdf_type1font.h" #include "core/fpdfapi/page/cpdf_textobject.h" #include "core/fpdfapi/parser/cpdf_array.h" #include "core/fpdfapi/parser/cpdf_dictionary.h" #include "core/fpdfapi/parser/cpdf_document.h" #include "core/fpdfapi/parser/cpdf_name.h" #include "core/fpdfapi/parser/cpdf_number.h" #include "core/fpdfapi/parser/cpdf_reference.h" #include "core/fpdfapi/parser/cpdf_stream.h" #include "core/fxge/cfx_fontmgr.h" #include "core/fxge/fx_font.h" #include "fpdfsdk/fsdk_define.h" #include "public/fpdf_edit.h" DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPageObj_NewTextObj(FPDF_DOCUMENT document, FPDF_BYTESTRING font, float font_size) { CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); if (!pDoc) return nullptr; CPDF_Font* pFont = CPDF_Font::GetStockFont(pDoc, CFX_ByteStringC(font)); if (!pFont) return nullptr; CPDF_TextObject* pTextObj = new CPDF_TextObject; pTextObj->m_TextState.SetFont(pFont); pTextObj->m_TextState.SetFontSize(font_size); pTextObj->DefaultStates(); return pTextObj; } DLLEXPORT FPDF_BOOL STDCALL FPDFText_SetText(FPDF_PAGEOBJECT text_object, FPDF_BYTESTRING text) { if (!text_object) return false; auto pTextObj = reinterpret_cast<CPDF_TextObject*>(text_object); pTextObj->SetText(CFX_ByteString(text)); return true; } DLLEXPORT FPDF_FONT STDCALL FPDFText_LoadType1Font(FPDF_DOCUMENT document, const uint8_t* data, uint32_t size) { CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); if (!pDoc || !data || size == 0) return nullptr; auto pFont = pdfium::MakeUnique<CFX_Font>(); // TODO(npm): Maybe use FT_Get_X11_Font_Format to check format? if (!pFont->LoadEmbedded(data, size)) return nullptr; CPDF_Dictionary* fontDict = pDoc->NewIndirect<CPDF_Dictionary>(); fontDict->SetNewFor<CPDF_Name>("Type", "Font"); fontDict->SetNewFor<CPDF_Name>("Subtype", "Type1"); CFX_ByteString name = pFont->GetFaceName(); if (name.IsEmpty()) name = "Unnamed"; fontDict->SetNewFor<CPDF_Name>("BaseFont", name); uint32_t glyphIndex; int currentChar = FXFT_Get_First_Char(pFont->GetFace(), &glyphIndex); fontDict->SetNewFor<CPDF_Number>("FirstChar", currentChar); int nextChar; CPDF_Array* widthsArray = pDoc->NewIndirect<CPDF_Array>(); while (true) { int width = pFont->GetGlyphWidth(glyphIndex); widthsArray->AddNew<CPDF_Number>(width); nextChar = FXFT_Get_Next_Char(pFont->GetFace(), currentChar, &glyphIndex); if (glyphIndex == 0) break; for (int i = currentChar + 1; i < nextChar; i++) widthsArray->AddNew<CPDF_Number>(0); currentChar = nextChar; } fontDict->SetNewFor<CPDF_Number>("LastChar", currentChar); fontDict->SetNewFor<CPDF_Reference>("Widths", pDoc, widthsArray->GetObjNum()); CPDF_Dictionary* fontDesc = pDoc->NewIndirect<CPDF_Dictionary>(); fontDesc->SetNewFor<CPDF_Name>("Type", "FontDescriptor"); fontDesc->SetNewFor<CPDF_Name>("FontName", name); int flags = 0; if (FXFT_Is_Face_fixedwidth(pFont->GetFace())) flags |= FXFONT_FIXED_PITCH; if (name.Find("Serif") > -1) flags |= FXFONT_SERIF; if (FXFT_Is_Face_Italic(pFont->GetFace())) flags |= FXFONT_ITALIC; if (FXFT_Is_Face_Bold(pFont->GetFace())) flags |= FXFONT_BOLD; // TODO(npm): How do I know if a Type1 font is symbolic, script, allcap, // smallcap flags |= FXFONT_NONSYMBOLIC; fontDesc->SetNewFor<CPDF_Number>("Flags", flags); FX_RECT bbox; pFont->GetBBox(bbox); auto pBBox = pdfium::MakeUnique<CPDF_Array>(); pBBox->AddNew<CPDF_Number>(bbox.left); pBBox->AddNew<CPDF_Number>(bbox.bottom); pBBox->AddNew<CPDF_Number>(bbox.right); pBBox->AddNew<CPDF_Number>(bbox.top); fontDesc->SetFor("FontBBox", std::move(pBBox)); // TODO(npm): calculate italic angle correctly fontDesc->SetNewFor<CPDF_Number>("ItalicAngle", pFont->IsItalic() ? -12 : 0); fontDesc->SetNewFor<CPDF_Number>("Ascent", pFont->GetAscent()); fontDesc->SetNewFor<CPDF_Number>("Descent", pFont->GetDescent()); // TODO(npm): calculate the capheight, stemV correctly fontDesc->SetNewFor<CPDF_Number>("CapHeight", pFont->GetAscent()); fontDesc->SetNewFor<CPDF_Number>("StemV", pFont->IsBold() ? 120 : 70); CPDF_Stream* pStream = pDoc->NewIndirect<CPDF_Stream>(); pStream->SetData(data, size); fontDesc->SetNewFor<CPDF_Reference>("FontFile", pDoc, pStream->GetObjNum()); fontDict->SetNewFor<CPDF_Reference>("FontDescriptor", pDoc, fontDesc->GetObjNum()); return pDoc->LoadFont(fontDict); }