Created filter command line tool

https://codereview.appspot.com/6595066/



git-svn-id: http://skia.googlecode.com/svn/trunk@5803 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/tools.gyp

@@ -21,6 +21,7 @@
         'render_pictures',
         'bench_pictures',
         'pinspect',
+        'filter',
       ],
     },
     {
@@ -163,6 +164,23 @@
         'utils.gyp:utils',
       ],
     },
+    {
+      'target_name': 'filter',
+      'type': 'executable',
+      'include_dirs' : [
+        '../src/core',
+      ],
+      'sources': [
+        '../tools/filtermain.cpp',
+      ],
+      'dependencies': [
+        'core.gyp:core',
+        'effects.gyp:effects',
+        'images.gyp:images',
+        'ports.gyp:ports',
+        'utils.gyp:utils',
+      ],
+    },
   ],
 }
 

tools/filtermain.cpp

@@ -0,0 +1,92 @@
+/*
+ * 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 "SkGraphics.h"
+#include "SkPicture.h"
+#include "SkStream.h"
+
+///////////////////////////////////////////////////////////////////////////////
+static void usage() {
+    SkDebugf("Usage: filter -i inFile -o outFile [-h|--help]");
+    SkDebugf("\n\n");
+    SkDebugf("    -i inFile  : file to file.\n");
+    SkDebugf("    -o outFile : result of filtering.\n");
+    SkDebugf("    -h|--help  : Show this help message.\n");
+}
+
+int filter_main(int argc, char** argv);
+int filter_main(int argc, char** argv) {
+
+    SkGraphics::Init();
+
+    SkString inFile, outFile;
+
+    if (argc < 5) {
+        usage();
+        return -1;
+    }
+
+    char* const* stop = argv + argc;
+    for (++argv; argv < stop; ++argv) {
+        if (strcmp(*argv, "-i") == 0) {
+            argv++;
+            if (argv < stop && **argv) {
+                inFile.set(*argv);
+            } else {
+                SkDebugf("missing arg for --i\n");
+                usage();
+                return -1;
+            }
+        } else if (strcmp(*argv, "-o") == 0) {
+            argv++;
+            if (argv < stop && **argv) {
+                outFile.set(*argv);
+            } else {
+                SkDebugf("missing arg for --o\n");
+                usage();
+                return -1;
+            }
+        } else if (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0) {
+            usage();
+            return 0;
+        } else {
+            SkDebugf("unknown arg %s\n", *argv);
+            usage();
+            return -1;
+        }
+    }
+
+    SkPicture* inPicture = NULL;
+
+    SkFILEStream inStream(inFile.c_str());
+    if (inStream.isValid()) {
+        inPicture = SkNEW_ARGS(SkPicture, (&inStream));
+    }
+
+    if (NULL == inPicture) {
+        SkDebugf("Could not read file %s\n", inFile.c_str());
+        return -1;
+    }
+
+    SkPicture outPicture;
+    inPicture->draw(outPicture.beginRecording(inPicture->width(), inPicture->height()));
+    outPicture.endRecording();
+
+    SkFILEWStream outStream(outFile.c_str());
+    outPicture.serialize(&outStream);
+
+    SkGraphics::Term();
+
+    return 0;
+}
+
+#if !defined SK_BUILD_FOR_IOS
+int main(int argc, char * const argv[]) {
+    return filter_main(argc, (char**) argv);
+}
+#endif
+