new option: --bg-format

CMakeLists.txt

@@ -181,6 +181,7 @@ set(PDF2HTMLEX_SRC ${PDF2HTMLEX_SRC}
     src/HTMLRenderer/state.cc
     src/HTMLRenderer/text.cc
     src/BackgroundRenderer/BackgroundRenderer.h 
+    src/BackgroundRenderer/BackgroundRenderer.cc
     src/BackgroundRenderer/SplashBackgroundRenderer.h 
     src/BackgroundRenderer/SplashBackgroundRenderer.cc 
     src/BackgroundRenderer/CairoBackgroundRenderer.h 

pdf2htmlEX.1.in

@@ -223,6 +223,12 @@ If set to 0, pdf2htmlEX would try its best to balance the two methods above.
 .B --optimize-text <0|1> (Deafult: 0)
 If set to 1, pdf2htmlEX will try to reduce the number of HTML elements used for text. Turn it off if anything goes wrong.
 
+.SS Background Image
+
+.TP
+.B --bg-format <format> (Default: "png")
+Specify the format for background images, currently "png" and "svg" are supported.
+
 .SS PDF Protection
 
 .TP

src/BackgroundRenderer/BackgroundRenderer.cc

@@ -0,0 +1,39 @@
+/*
+ * Background renderer
+ * Render all those things not supported as Image
+ *
+ * Copyright (C) 2013 Lu Wang <coolwanglu@gmail.com>
+ */
+
+#include "HTMLRenderer/HTMLRenderer.h"
+#include "Param.h"
+
+#include "BackgroundRenderer.h"
+#include "SplashBackgroundRenderer.h"
+#if ENABLE_SVG
+#include "CairoBackgroundRenderer.h"
+#endif
+
+namespace pdf2htmlEX {
+
+BackgroundRenderer * BackgroundRenderer::getBackgroundRenderer(const std::string & format, HTMLRenderer * html_renderer, const Param & param)
+{
+    if(format == "png")
+    {
+        return new SplashBackgroundRenderer(html_renderer, param);
+    }
+    else if (format == "svg")
+    {
+#if ENABLE_SVG
+        return new CairoBackgroundRenderer(html_renderer, param);
+#else
+        return nullptr;
+#endif 
+    }
+    else
+    {
+        return nullptr;
+    }
+}
+
+} // namespace pdf2htmlEX

src/BackgroundRenderer/BackgroundRenderer.h

@@ -2,31 +2,36 @@
  * Background renderer
  * Render all those things not supported as Image
  *
- * Copyright (C) 2012 Lu Wang <coolwanglu@gmail.com>
+ * Copyright (C) 2012,2013 Lu Wang <coolwanglu@gmail.com>
  */
 
 
 #ifndef BACKGROUND_RENDERER_H__
 #define BACKGROUND_RENDERER_H__
 
-#include "pdf2htmlEX-config.h"
+#include <string>
 
-#if ENABLE_SVG
-
-#include "CairoBackgroundRenderer.h"
+class PDFDoc;
 
 namespace pdf2htmlEX {
-    typedef CairoBackgroundRenderer BackgroundRenderer;
-}
 
-#else
+class Param;
+class HTMLRenderer;
+class BackgroundRenderer 
+{
+public:
+    // return nullptr upon failure
+    static BackgroundRenderer * getBackgroundRenderer(const std::string & format, HTMLRenderer * html_renderer, const Param & param);
 
-#include "SplashBackgroundRenderer.h" 
+    BackgroundRenderer() {}
+    virtual ~BackgroundRenderer() {}
 
-namespace pdf2htmlEX {
-    typedef SplashBackgroundRenderer BackgroundRenderer;
-}
+    virtual void init(PDFDoc * doc) = 0;
+    virtual void render_page(PDFDoc * doc, int pageno) = 0;
+    virtual void embed_image(int pageno) = 0;
 
-#endif // ENABLE_SVG
+};
+
+} // namespace pdf2htmlEX
 
 #endif //BACKGROUND_RENDERER_H__

src/BackgroundRenderer/BackgroundRenderer_forward.h

@@ -1,29 +0,0 @@
-/*
- * Background renderer
- * Render all those things not supported as Image
- *
- * Copyright (C) 2013 Lu Wang <coolwanglu@gmail.com>
- */
-
-
-/*
- * This file includes forward declarations since HTMLRenderer and BackgroundRendere have cross references
- */
-
-#ifndef BACKGROUND_RENDERER_FORWARD_H__
-#define BACKGROUND_RENDERER_FORWARD_H__
-
-#include "pdf2htmlEX-config.h"
-
-namespace pdf2htmlEX {
-#if ENABLE_SVG
-    class CairoBackgroundRenderer;
-    typedef CairoBackgroundRenderer BackgroundRenderer;
-#else
-    class SplashBackgroundRenderer;
-    typedef SplashBackgroundRenderer BackgroundRenderer;
-#endif // ENABLE_SVG
-}
-
-
-#endif //BACKGROUND_RENDERER_FORWARD_H__

src/BackgroundRenderer/CairoBackgroundRenderer.cc

@@ -1,7 +1,7 @@
 /*
  * CairoBackgroundRenderer.cc
  *
- * Copyright (C) 2012 Lu Wang <coolwanglu@gmail.com>
+ * Copyright (C) 2012,2013 Lu Wang <coolwanglu@gmail.com>
  */
 
 #include <string>
@@ -29,6 +29,11 @@ void CairoBackgroundRenderer::drawChar(GfxState *state, double x, double y,
     //    CairoOutputDev::drawChar(state,x,y,dx,dy,originX,originY,code, nBytes, u, uLen);
 }
 
+void CairoBackgroundRenderer::init(PDFDoc * doc)
+{
+    startDoc(doc);
+}
+
 static GBool annot_cb(Annot *, void *) {
     return false;
 };

src/BackgroundRenderer/CairoBackgroundRenderer.h

@@ -2,7 +2,7 @@
  * Cairo Background renderer
  * Render all those things not supported as Image, with Cairo
  *
- * Copyright (C) 2012 Lu Wang <coolwanglu@gmail.com>
+ * Copyright (C) 2012,2013 Lu Wang <coolwanglu@gmail.com>
  */
 
 
@@ -21,7 +21,7 @@
 namespace pdf2htmlEX {
 
 // Based on BackgroundRenderer from poppler
-class CairoBackgroundRenderer : public CairoOutputDev 
+class CairoBackgroundRenderer : public BackgroundRenderer, CairoOutputDev 
 {
 public:
   CairoBackgroundRenderer(HTMLRenderer * html_renderer, const Param & param)
@@ -33,14 +33,15 @@ public:
 
   virtual ~CairoBackgroundRenderer() { }
 
+  virtual void init(PDFDoc * doc);
+  virtual void render_page(PDFDoc * doc, int pageno);
+  virtual void embed_image(int pageno);
+
   virtual void drawChar(GfxState *state, double x, double y,
       double dx, double dy,
       double originX, double originY,
       CharCode code, int nBytes, Unicode *u, int uLen);
 
-  void render_page(PDFDoc * doc, int pageno);
-  void embed_image(int pageno);
-
 protected:
   HTMLRenderer * html_renderer;
   const Param & param;

src/BackgroundRenderer/SplashBackgroundRenderer.cc

@@ -1,11 +1,12 @@
 /*
  * SplashBackgroundRenderer.cc
  *
- * Copyright (C) 2012 Lu Wang <coolwanglu@gmail.com>
+ * Copyright (C) 2012,2013 Lu Wang <coolwanglu@gmail.com>
  */
 
 #include <fstream>
 #include <vector>
+#include <memory>
 
 #include <PDFDoc.h>
 #include <goo/PNGWriter.h>
@@ -19,6 +20,7 @@ namespace pdf2htmlEX {
 using std::string;
 using std::ifstream;
 using std::vector;
+using std::unique_ptr;
 
 const SplashColor SplashBackgroundRenderer::white = {255,255,255};
 
@@ -63,6 +65,11 @@ void SplashBackgroundRenderer::drawChar(GfxState *state, double x, double y,
     }
 }
 
+void SplashBackgroundRenderer::init(PDFDoc * doc)
+{
+    startDoc(doc);
+}
+
 static GBool annot_cb(Annot *, void *) {
     return false;
 };
@@ -134,7 +141,8 @@ void SplashBackgroundRenderer::dump_image(const char * filename, int x1, int y1,
     if(!f)
         throw string("Cannot open file for background image " ) + filename;
 
-    ImgWriter * writer = new PNGWriter();
+    // use unique_ptr to auto delete the object upon exception
+    auto writer = unique_ptr<ImgWriter>(new PNGWriter);
     if(!writer->init(f, width, height, param.h_dpi, param.v_dpi))
         throw "Cannot initialize PNGWriter";
         
@@ -157,7 +165,6 @@ void SplashBackgroundRenderer::dump_image(const char * filename, int x1, int y1,
         throw "Cannot write background image";
     }
 
-    delete writer;
     fclose(f);
 }
 

src/BackgroundRenderer/SplashBackgroundRenderer.h

@@ -2,8 +2,7 @@
  * Splash Background renderer
  * Render all those things not supported as Image, with Splash
  *
- * by WangLu
- * 2012.08.06
+ * Copyright (C) 2012,2013 Lu Wang <coolwanglu@gmail.com>
  */
 
 
@@ -23,7 +22,7 @@
 namespace pdf2htmlEX {
 
 // Based on BackgroundRenderer from poppler
-class SplashBackgroundRenderer : public SplashOutputDev 
+class SplashBackgroundRenderer : public BackgroundRenderer, SplashOutputDev 
 {
 public:
   static const SplashColor white;
@@ -36,6 +35,10 @@ public:
 
   virtual ~SplashBackgroundRenderer() { }
 
+  virtual void init(PDFDoc * doc);
+  virtual void render_page(PDFDoc * doc, int pageno);
+  virtual void embed_image(int pageno);
+
 #if POPPLER_OLDER_THAN_0_23_0
   virtual void startPage(int pageNum, GfxState *state);
 #else
@@ -57,11 +60,8 @@ public:
           SplashOutputDev::fill(state);
   }
 
-  void render_page(PDFDoc * doc, int pageno);
-  void embed_image(int pageno);
-  void dump_image(const char * filename, int x1, int y1, int x2, int y2);
-
 protected:
+  void dump_image(const char * filename, int x1, int y1, int x2, int y2);
   HTMLRenderer * html_renderer;
   const Param & param;
 };

src/HTMLRenderer/HTMLRenderer.h

@@ -30,7 +30,7 @@
 #include "StateManager.h"
 #include "HTMLTextPage.h"
 
-#include "BackgroundRenderer/BackgroundRenderer_forward.h"
+#include "BackgroundRenderer/BackgroundRenderer.h"
 
 #include "util/const.h"
 #include "util/misc.h"
@@ -321,8 +321,10 @@ protected:
     StringFormatter str_fmt;
 
     // render background image
-    friend class SplashBackgroundRenderer;
-    friend class CairoBackgroundRenderer;
+    friend class SplashBackgroundRenderer; // ugly!
+#if ENABLE_SVG
+    friend class CairoBackgroundRenderer; // ugly!
+#endif
     BackgroundRenderer * bg_renderer;
 
 

src/HTMLRenderer/general.cc

@@ -100,8 +100,10 @@ void HTMLRenderer::process(PDFDoc *doc)
     bg_renderer = nullptr;
     if(param.process_nontext)
     {
-        bg_renderer = new BackgroundRenderer(this, param);
-        bg_renderer->startDoc(doc);
+        bg_renderer = BackgroundRenderer::getBackgroundRenderer(param.bg_format, this, param);
+        if(!bg_renderer)
+            throw "Cannot initialize background renderer, unsupported format";
+        bg_renderer->init(doc);
     }
 
     int page_count = (param.last_page - param.first_page + 1);

src/Param.h

@@ -58,6 +58,9 @@ struct Param
     int tounicode;
     int optimize_text;
 
+    // background image
+    std::string bg_format;
+    
     // encryption
     std::string owner_password, user_password;
     int no_drm;
@@ -67,9 +70,7 @@ struct Param
     std::string data_dir;
     int css_draw;
     int debug;
-    int wa_unicode;
     
-    // non-optional
     std::string input_filename, output_filename;
 
     // not a paramater

src/pdf2htmlEX.cc

@@ -36,18 +36,6 @@ using namespace pdf2htmlEX;
 Param param;
 ArgParser argparser;
 
-void deprecated_single_html(const char * dummy = nullptr)
-{
-    cerr << "--single_html is deprecated. Use `--embed CFIJO` instead." << endl;
-    exit(EXIT_FAILURE);
-}
-
-void removed_remove_unsed_glyph(const char * dummy = nullptr)
-{
-    cerr << "--remove-unsed-glyph is removed. Use a PDF optimization tool instead." << endl;
-    exit(EXIT_FAILURE);
-}
-
 void show_usage_and_exit(const char * dummy = nullptr)
 {
     cerr << "Usage: pdf2htmlEX [options] <input.pdf> [<output.html>]" << endl;
@@ -142,6 +130,9 @@ void parse_options (int argc, char **argv)
         .add("tounicode", &param.tounicode, 0, "how to handle ToUnicode CMaps (0=auto, 1=force, -1=ignore)")
         .add("optimize-text", &param.optimize_text, 0, "try to reduce the number of HTML elements used for text")
 
+        // background image
+        .add("bg-format", &param.bg_format, "png", "specify background image format")
+        
         // encryption
         .add("owner-password,o", &param.owner_password, "", "owner password (for encrypted files)", true)
         .add("user-password,u", &param.user_password, "", "user password (for encrypted files)", true)
@@ -158,10 +149,6 @@ void parse_options (int argc, char **argv)
         .add("version,v", "print copyright and version info", &show_version_and_exit)
         .add("help,h", "print usage information", &show_usage_and_exit)
 
-        // deprecated
-        .add("single-html", "", &deprecated_single_html)
-        .add("remove-unused-glyph", "", &removed_remove_unsed_glyph)
-        
         .add("", &param.input_filename, "", "")
         .add("", &param.output_filename, "", "")
         ;
@@ -192,72 +179,13 @@ void parse_options (int argc, char **argv)
     }
 }
 
-int main(int argc, char **argv)
+void check_param()
 {
-    parse_options(argc, argv);
     if (param.input_filename == "")
     {
         show_usage_and_exit();
     }
 
-    //prepare the directories
-    {
-        char buf[] = "/tmp/pdf2htmlEX-XXXXXX";
-        auto p = mkdtemp(buf);
-        if(p == nullptr)
-        {
-            cerr << "Cannot create temp directory" << endl;
-            exit(EXIT_FAILURE);
-        }
-        param.tmp_dir = buf;
-    }
-
-    if(param.debug)
-        cerr << "temporary dir: " << (param.tmp_dir) << endl;
-
-    try
-    {
-        create_directories(param.dest_dir);
-    }
-    catch (const string & s)
-    {
-        cerr << s << endl;
-        exit(EXIT_FAILURE);
-    }
-
-    bool finished = false;
-    // read config file
-    globalParams = new GlobalParams();
-    // open PDF file
-    PDFDoc * doc = nullptr;
-    try
-    {
-        {
-            GooString * ownerPW = (param.owner_password == "") ? (nullptr) : (new GooString(param.owner_password.c_str()));
-            GooString * userPW = (param.user_password == "") ? (nullptr) : (new GooString(param.user_password.c_str()));
-            GooString fileName(param.input_filename.c_str());
-
-            doc = PDFDocFactory().createPDFDoc(fileName, ownerPW, userPW);
-
-            delete userPW;
-            delete ownerPW;
-        }
-
-        if (!doc->isOk()) {
-            throw "Cannot read the file";
-        }
-
-        // check for copy permission
-        if (!doc->okToCopy()) {
-            if (param.no_drm == 0) {
-                throw "Copying of text from this document is not allowed.";
-            }
-            cerr << "Document has copy-protection bit set." << endl;
-        }
-
-        param.first_page = min<int>(max<int>(param.first_page, 1), doc->getNumPages());
-        param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
-
     if(param.output_filename.empty())
     {
         const string s = get_filename(param.input_filename);
@@ -324,8 +252,87 @@ int main(int argc, char **argv)
             if(!param.split_pages)
                 param.outline_filename = s + ".outline";
         }
-
     }
+    if(param.bg_format == "svg")
+    {
+#if not ENABLE_SVG
+        cerr << "SVG support is not built" << endl;
+        exit(EXIT_FAILURE);
+#endif
+    }
+    else if (param.bg_format == "png")
+    {
+        // pass
+    }
+    else
+    {
+        cerr << "Unknown format for background: " << param.bg_format << endl;
+        exit(EXIT_FAILURE);
+    }
+}
+
+int main(int argc, char **argv)
+{
+    parse_options(argc, argv);
+    check_param();
+
+    //prepare the directories
+    {
+        char buf[] = "/tmp/pdf2htmlEX-XXXXXX";
+        auto p = mkdtemp(buf);
+        if(p == nullptr)
+        {
+            cerr << "Cannot create temp directory" << endl;
+            exit(EXIT_FAILURE);
+        }
+        param.tmp_dir = buf;
+    }
+
+    if(param.debug)
+        cerr << "temporary dir: " << (param.tmp_dir) << endl;
+
+    try
+    {
+        create_directories(param.dest_dir);
+    }
+    catch (const string & s)
+    {
+        cerr << s << endl;
+        exit(EXIT_FAILURE);
+    }
+
+    bool finished = false;
+    // read config file
+    globalParams = new GlobalParams();
+    // open PDF file
+    PDFDoc * doc = nullptr;
+    try
+    {
+        {
+            GooString * ownerPW = (param.owner_password == "") ? (nullptr) : (new GooString(param.owner_password.c_str()));
+            GooString * userPW = (param.user_password == "") ? (nullptr) : (new GooString(param.user_password.c_str()));
+            GooString fileName(param.input_filename.c_str());
+
+            doc = PDFDocFactory().createPDFDoc(fileName, ownerPW, userPW);
+
+            delete userPW;
+            delete ownerPW;
+        }
+
+        if (!doc->isOk()) 
+            throw "Cannot read the file";
+
+        // check for copy permission
+        if (!doc->okToCopy()) 
+        {
+            if (param.no_drm == 0)
+                throw "Copying of text from this document is not allowed.";
+            cerr << "Document has copy-protection bit set." << endl;
+        }
+
+        param.first_page = min<int>(max<int>(param.first_page, 1), doc->getNumPages());
+        param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
+
 
         unique_ptr<HTMLRenderer>(new HTMLRenderer(param))->process(doc);