pdfviewer: some code cleanup in renderer

experimental/PdfViewer/pdf_viewer_main.cpp

 #include "SkCanvas.h"
 #include "SkCommandLineFlags.h"
 #include "SkDevice.h"
 #include "SkGraphics.h"
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkOSFile.h"
 #include "SkPicture.h"
 #include "SkStream.h"
 #include "SkTypeface.h"
 #include "SkTArray.h"
 #include "picture_utils.h"
 
 #include "SkPdfRenderer.h"
 
 DEFINE_string2(readPath, r, "", "pdf files or directories of pdf files to process.");
 DEFINE_string2(writePath, w, "", "Directory to write the rendered pages.");
 DEFINE_bool2(noExtensionForOnePagePdf, n, false, "No page extension if only one page.");
 DEFINE_bool2(showMemoryUsage, m, false, "Show Memory usage.");
 DEFINE_string2(pages, p, "all", "What pages to render and how:\n"
                                 "\tall - all pages\n"
                                 "\treverse - all pages, in reverse order\n"
                                 "\tfirst - first page\n"
                                 "\tlast - last page\n"
                                 "\tnumber - a specific page number\n"
                );
+DEFINE_double(DPI, 72, "DPI to be used for rendering (scale).");
+// TODO(edisonn): add config for device target(gpu, raster, pdf), + ability not to render at all
+// TODO(edisonn): add ability to do the op N times, bench (either load N times, render n times or load + render n times)
 
 
 /**
  * Given list of directories and files to use as input, expects to find .pdf
  * files and it will convert them to .png files writing them in the same directory
  * one file for each page.
  *
  * Returns zero exit code if all .pdf files were converted successfully,
  * otherwise returns error code 1.
  */
@@ skipping 215 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif