Add utility to convert skp files to pdf files. Code compatible with render_pictures_main.cpp. I could have refactored the code to avoid code duplication, but it does not seem right, and it will overcomplicate the code.

Review URL: https://codereview.appspot.com/6615073

git-svn-id: http://skia.googlecode.com/svn/trunk@6253 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/tools.gyp

@@ -119,6 +119,27 @@
         'images.gyp:images',
       ],
     },
+    {
+      'target_name': 'render_pdfs',
+      'type': 'executable',
+      'sources': [
+        '../tools/render_pdfs_main.cpp',
+        '../tools/PdfRenderer.cpp',
+        '../tools/PdfRenderer.h',
+      ],
+      'include_dirs': [
+        '../src/pipe/utils/',
+        '../src/utils/',
+      ],
+      'dependencies': [
+        'core.gyp:core',
+        'effects.gyp:effects',
+        'images.gyp:images',
+        'pdf.gyp:pdf',
+        'ports.gyp:ports',
+        'tools.gyp:picture_utils',
+      ],
+    },
     {
       'target_name': 'picture_utils',
       'type': 'static_library',

tools/render_pdfs_main.cpp

@@ -0,0 +1,211 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkCanvas.h"
+#include "SkDevice.h"
+#include "SkGraphics.h"
+#include "SkOSFile.h"
+#include "SkPicture.h"
+#include "SkStream.h"
+#include "SkTArray.h"
+#include "PdfRenderer.h"
+#include "picture_utils.h"
+
+/**
+ * render_pdfs
+ *
+ * Given list of directories and files to use as input, expects to find .skp
+ * files and it will convert them to .pdf files writing them in the output
+ * directory.
+ *
+ * Returns zero exit code if all .skp files were converted successfully,
+ * otherwise returns error code 1.
+ */
+
+static const char PDF_FILE_EXTENSION[] = "pdf";
+static const char SKP_FILE_EXTENSION[] = "skp";
+
+static void usage(const char* argv0) {
+    SkDebugf("SKP to PDF rendering tool\n");
+    SkDebugf("\n"
+"Usage: \n"
+"     %s <input>... <outputDir> \n"
+, argv0);
+    SkDebugf("\n\n");
+    SkDebugf(
+"     input:     A list of directories and files to use as input. Files are\n"
+"                expected to have the .skp extension.\n\n");
+    SkDebugf(
+"     outputDir: directory to write the rendered pdfs.\n\n");
+    SkDebugf("\n");
+}
+
+/** Replaces the extension of a file.
+ * @param path File name whose extension will be changed.
+ * @param old_extension The old extension.
+ * @param new_extension The new extension.
+ * @returns false if the file did not has the expected extension.
+ *  if false is returned, contents of path are undefined.
+ */
+static bool replace_filename_extension(SkString* path,
+                                       const char old_extension[],
+                                       const char new_extension[]) {
+    if (path->endsWith(old_extension)) {
+        path->remove(path->size() - strlen(old_extension),
+                     strlen(old_extension));
+        if (!path->endsWith(".")) {
+            return false;
+        }
+        path->append(new_extension);
+        return true;
+    }
+    return false;
+}
+
+/** Builds the output filename. path = dir/name, and it replaces expected 
+ * .skp extension with .pdf extention.
+ * @param path Output filename.
+ * @param name The name of the file.
+ * @returns false if the file did not has the expected extension.
+ *  if false is returned, contents of path are undefined.
+ */
+static bool make_output_filepath(SkString* path, const SkString& dir,
+                                 const SkString& name) {
+    sk_tools::make_filepath(path, dir, name);
+    return replace_filename_extension(path,
+                                      SKP_FILE_EXTENSION,
+                                      PDF_FILE_EXTENSION);
+}
+
+/** Write the output of pdf renderer to a file.
+ * @param outputDir Output dir.
+ * @param inputFilename The skp file that was read.
+ * @param renderer The object responsible to write the pdf file.
+ */
+static bool write_output(const SkString& outputDir,
+                         const SkString& inputFilename,
+                         const sk_tools::PdfRenderer& renderer) {
+    SkString outputPath;
+    if (!make_output_filepath(&outputPath, outputDir, inputFilename)) {
+        return false;
+    }
+    bool isWritten = renderer.write(outputPath);
+    if (!isWritten) {
+        SkDebugf("Could not write to file %s\n", outputPath.c_str());
+    }
+    return isWritten;
+}
+
+/** Reads an skp file, renders it to pdf and writes the output to a pdf file
+ * @param inputPath The skp file to be read.
+ * @param outputDir Output dir.
+ * @param renderer The object responsible to render the skp object into pdf.
+ */
+static bool render_pdf(const SkString& inputPath, const SkString& outputDir,
+                       sk_tools::PdfRenderer& renderer) {
+    SkString inputFilename;
+    sk_tools::get_basename(&inputFilename, inputPath);
+
+    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;
+    SkAutoTUnref<SkPicture>
+        picture(SkNEW_ARGS(SkPicture, (&inputStream, &success)));
+
+    if (!success) {
+        SkDebugf("Could not read an SkPicture from %s\n", inputPath.c_str());
+        return false;
+    }
+
+    SkDebugf("exporting... [%i %i] %s\n", picture->width(), picture->height(),
+             inputPath.c_str());
+
+    renderer.init(picture);
+
+    renderer.render();
+
+    success = write_output(outputDir, inputFilename, renderer);
+
+    renderer.end();
+    return success;
+}
+
+/** For each file in the directory or for the file passed in input, call
+ * render_pdf.
+ * @param input A directory or an skp file.
+ * @param outputDir Output dir.
+ * @param renderer The object responsible to render the skp object into pdf.
+ */
+static int process_input(const SkString& input, const SkString& outputDir,
+                         sk_tools::PdfRenderer& renderer) {
+    int failures = 0;
+    if (sk_isdir(input.c_str())) {
+        SkOSFile::Iter iter(input.c_str(), SKP_FILE_EXTENSION);
+        SkString inputFilename;
+        while (iter.next(&inputFilename)) {
+            SkString inputPath;
+            sk_tools::make_filepath(&inputPath, input, inputFilename);
+            if (!render_pdf(inputPath, outputDir, renderer)) {
+                ++failures;
+            }
+        }
+    } else {
+        SkString inputPath(input);
+        if (!render_pdf(inputPath, outputDir, renderer)) {
+            ++failures;
+        }
+    }
+    return failures;
+}
+
+static void parse_commandline(int argc, char* const argv[],
+                              SkTArray<SkString>* inputs) {
+    const char* argv0 = argv[0];
+    char* const* stop = argv + argc;
+
+    for (++argv; argv < stop; ++argv) {
+        if ((0 == strcmp(*argv, "-h")) || (0 == strcmp(*argv, "--help"))) {
+            usage(argv0);
+            exit(-1);
+        } else {
+            inputs->push_back(SkString(*argv));
+        }
+    }
+
+    if (inputs->count() < 2) {
+        usage(argv0);
+        exit(-1);
+    }
+}
+
+int main(int argc, char* const argv[]) {
+    SkAutoGraphics ag;
+    SkTArray<SkString> inputs;
+
+    SkAutoTUnref<sk_tools::PdfRenderer>
+        renderer(SkNEW(sk_tools::SimplePdfRenderer));
+    SkASSERT(renderer.get());
+
+    parse_commandline(argc, argv, &inputs);
+    SkString outputDir = inputs[inputs.count() - 1];
+
+    int failures = 0;
+    for (int i = 0; i < inputs.count() - 1; i ++) {
+        failures += process_input(inputs[i], outputDir, *renderer);
+    }
+
+    if (failures != 0) {
+        SkDebugf("Failed to render %i PDFs.\n", failures);
+        return 1;
+    }
+}
+