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author | Nicolas Pena <npm@chromium.org> | 2017-02-14 10:59:53 -0500 |
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committer | Chromium commit bot <commit-bot@chromium.org> | 2017-02-14 16:14:22 +0000 |
commit | dd40b8b802da1c068dab450b68c934be0358b6de (patch) | |
tree | 177e50efbdc811ce6dac5109ed8c6d98ae482128 /core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp | |
parent | d8b01ca3bd9c21e76443004907ea1bc02fb57b6e (diff) | |
download | pdfium-dd40b8b802da1c068dab450b68c934be0358b6de.tar.xz |
Add ProcessText supporting standard fonts
BUG=pdfium:667
Change-Id: I701719144127881ebdb5be01a51e833d1e576477
Reviewed-on: https://pdfium-review.googlesource.com/2691
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp')
-rw-r--r-- | core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp index 9de97ee718..4de89a47de 100644 --- a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp +++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp @@ -9,12 +9,14 @@ #include <tuple> #include <utility> +#include "core/fpdfapi/font/cpdf_font.h" #include "core/fpdfapi/page/cpdf_docpagedata.h" #include "core/fpdfapi/page/cpdf_image.h" #include "core/fpdfapi/page/cpdf_imageobject.h" #include "core/fpdfapi/page/cpdf_page.h" #include "core/fpdfapi/page/cpdf_path.h" #include "core/fpdfapi/page/cpdf_pathobject.h" +#include "core/fpdfapi/page/cpdf_textobject.h" #include "core/fpdfapi/parser/cpdf_dictionary.h" #include "core/fpdfapi/parser/cpdf_document.h" #include "core/fpdfapi/parser/cpdf_name.h" @@ -63,6 +65,8 @@ void CPDF_PageContentGenerator::GenerateContent() { ProcessImage(&buf, pImageObject); else if (CPDF_PathObject* pPathObj = pPageObj->AsPath()) ProcessPath(&buf, pPathObj); + else if (CPDF_TextObject* pTextObj = pPageObj->AsText()) + ProcessText(&buf, pTextObj); } CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict; CPDF_Object* pContent = @@ -240,3 +244,46 @@ bool CPDF_PageContentGenerator::GraphicsData::operator<( return fillAlpha < other.fillAlpha; return strokeAlpha < other.strokeAlpha; } + +bool CPDF_PageContentGenerator::FontData::operator<( + const FontData& other) const { + return baseFont < other.baseFont; +} + +// This method adds text to the buffer, BT begins the text object, ET ends it. +// Tm sets the text matrix (allows positioning and transforming text). +// Tf sets the font name (from Font in Resources) and font size. +// Tj sets the actual text, <####...> is used when specifying charcodes. +void CPDF_PageContentGenerator::ProcessText(CFX_ByteTextBuf* buf, + CPDF_TextObject* pTextObj) { + // TODO(npm): Add support for something other than standard type1 fonts. + *buf << "BT " << pTextObj->GetTextMatrix() << " Tm "; + CPDF_Font* pFont = pTextObj->GetFont(); + if (!pFont) + pFont = CPDF_Font::GetStockFont(m_pDocument, "Helvetica"); + FontData fontD; + fontD.baseFont = pFont->GetBaseFont(); + auto it = m_FontsMap.find(fontD); + CFX_ByteString dictName; + if (it != m_FontsMap.end()) { + dictName = it->second; + } else { + auto fontDict = pdfium::MakeUnique<CPDF_Dictionary>(); + fontDict->SetNewFor<CPDF_Name>("Type", "Font"); + fontDict->SetNewFor<CPDF_Name>("Subtype", "Type1"); + fontDict->SetNewFor<CPDF_Name>("BaseFont", fontD.baseFont); + CPDF_Object* pDict = m_pDocument->AddIndirectObject(std::move(fontDict)); + uint32_t dwObjNum = pDict->GetObjNum(); + dictName = RealizeResource(dwObjNum, "Font"); + m_FontsMap[fontD] = dictName; + } + *buf << "/" << PDF_NameEncode(dictName) << " " << pTextObj->GetFontSize() + << " Tf "; + CFX_ByteString text; + for (uint32_t charcode : pTextObj->m_CharCodes) { + if (charcode == CPDF_Font::kInvalidCharCode) + continue; + pFont->AppendChar(text, charcode); + } + *buf << PDF_EncodeString(text, true) << " Tj ET\n"; +} |