pdfviewer: add option to run the load or render multiple times, --benchLoad, --benchRender

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).");
+DEFINE_int32(benchLoad, 0, "Load the pdf file minimally N times, without any rendering and \n"
+             "\tminimal parsing to ensure correctness. Default 0 (disabled).");
+DEFINE_int32(benchRender, 0, "Render the pdf content N times. Default 0 (disabled)");
+
+
 // 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 113 matching lines @@
     SkFILEStream inputStream;
     inputStream.setPath(inputPath.c_str());
     if (!inputStream.isValid()) {
         SkDebugf("Could not open file %s\n", inputPath.c_str());
         return false;
     }
 
     bool success = false;
 
     success = renderer.load(inputPath);
+    if (FLAGS_showMemoryUsage) {
+        SkDebugf("Memory usage after load: %u\n", (unsigned int)renderer.bytesUsed());
+    }
+
+    // TODO(edisonn): bench timers
+    if (FLAGS_benchLoad > 0) {
+        for (int i = 0 ; i < FLAGS_benchLoad; i++) {
+            success = renderer.load(inputPath);
+            if (FLAGS_showMemoryUsage) {
+                SkDebugf("Memory usage after load %i number : %u\n", i, (unsigned int)renderer.bytesUsed());
+            }
+        }
+    }
 
     if (success) {
-        if (FLAGS_showMemoryUsage) {
-            SkDebugf("Memory usage after load: %u\n", (unsigned int)renderer.bytesUsed());
-        }
         if (!renderer.pages())
         {
             SkDebugf("ERROR: Empty PDF Document %s\n", inputPath.c_str());
             return false;
         } else {
-            if (strcmp(FLAGS_pages[0], "all") == 0) {
-                for (int pn = 0; pn < renderer.pages(); ++pn) {
-                    success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : pn) && success;
+            for (int i = 0; i < FLAGS_benchRender + 1; i++) {
+                // TODO(edisonn) if (i == 1) start timer
+                if (strcmp(FLAGS_pages[0], "all") == 0) {
+                    for (int pn = 0; pn < renderer.pages(); ++pn) {
+                        success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : pn) && success;
+                    }
+                } else if (strcmp(FLAGS_pages[0], "reverse") == 0) {
+                    for (int pn = renderer.pages() - 1; pn >= 0; --pn) {
+                        success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : pn) && success;
+                    }
+                } else if (strcmp(FLAGS_pages[0], "first") == 0) {
+                    success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : 0) && success;
+                } else if (strcmp(FLAGS_pages[0], "last") == 0) {
+                    success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : renderer.pages() - 1) && success;
+                } else {
+                    int pn = atoi(FLAGS_pages[0]);
+                    success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : renderer.pages() - 1) && pn;
                 }
-            } else if (strcmp(FLAGS_pages[0], "reverse") == 0) {
-                for (int pn = renderer.pages() - 1; pn >= 0; --pn) {
-                    success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : pn) && success;
-                }
-            } else if (strcmp(FLAGS_pages[0], "first") == 0) {
-                success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : 0) && success;
-            } else if (strcmp(FLAGS_pages[0], "last") == 0) {
-                success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : renderer.pages() - 1) && success;
-            } else {
-                int pn = atoi(FLAGS_pages[0]);
-                success = render_page(outputDir, inputFilename, renderer, FLAGS_noExtensionForOnePagePdf && renderer.pages() == 1 ? -1 : renderer.pages() - 1) && pn;
             }
         }
     }
 
     return success;
 }
 
 /** For each file in the directory or for the file passed in input, call
  * parse_pdf.
  * @param input A directory or an pdf file.
@@ skipping 55 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif