Initial SVG backend stubbing

experimental/svg/skp2svg.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "LazyDecodeBitmap.h"
+#include "SkCommandLineFlags.h"
+#include "SkPicture.h"
+#include "SkStream.h"
+#include "SkSVGDevice.h"
+
+DEFINE_string2(input, i, "", "input skp file");
+DEFINE_string2(output, o, "", "output svg file (optional)");
+
+// return codes:
+static const int kSuccess     = 0;
+static const int kInvalidArgs = 1;
+static const int kIOError     = 2;
+static const int kNotAnSKP    = 3;
+
+int tool_main(int argc, char** argv);
+int tool_main(int argc, char** argv) {
+    SkCommandLineFlags::SetUsage("Converts an SKP file to SVG.");
+    SkCommandLineFlags::Parse(argc, argv);
+
+    if (FLAGS_input.count() != 1) {
+        SkDebugf("Missing input file\n");
+        return kInvalidArgs;
+    }
+
+    SkFILEStream stream(FLAGS_input[0]);
+    if (!stream.isValid()) {
+        SkDebugf("Couldn't open file: %s\n", FLAGS_input[0]);
+        return kIOError;
+    }
+
+    SkAutoTUnref<SkPicture> pic(SkPicture::CreateFromStream(&stream, &sk_tools::LazyDecodeBitmap));
+    if (!SkToBool(pic.get())) {
+        SkDebugf("Could not load SKP: %s\n", FLAGS_input[0]);
+        return kNotAnSKP;
+    }
+
+    SkAutoTDelete<SkWStream> outStream;
+    if (FLAGS_output.count() > 0) {
+        SkFILEWStream* fileStream = SkNEW_ARGS(SkFILEWStream, (FLAGS_output[0]));
+        if (!fileStream->isValid()) {
+            SkDebugf("Couldn't open output file for writing: %s\n", FLAGS_output[0]);
+            return kIOError;
+        }
+        outStream.reset(fileStream);
+    } else {
+        outStream.reset(SkNEW(SkDebugWStream));
+    }
+
+    SkISize size = pic->cullRect().roundOut().size();
+    SkAutoTUnref<SkBaseDevice> svgDevice(SkSVGDevice::Create(size, outStream));
+    SkCanvas svgCanvas(svgDevice.get());
+
+    pic->playback(&svgCanvas);
+
+    return kSuccess;
+}
+
+#if !defined SK_BUILD_FOR_IOS
+int main(int argc, char * const argv[]) {
+    return tool_main(argc, (char**) argv);
+}
+#endif