Prototype code that turns any/every flattenable into JSON

tools/debugger/SkJsonWriteBuffer.cpp

Index: tools/debugger/SkJsonWriteBuffer.cpp
diff --git a/tools/debugger/SkJsonWriteBuffer.cpp b/tools/debugger/SkJsonWriteBuffer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..1b5a962e670c72a9f7c6286ac8ce79070f2f713d
--- /dev/null
+++ b/tools/debugger/SkJsonWriteBuffer.cpp
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkJsonWriteBuffer.h"
+
+#include "SkDrawCommand.h"
+#include "SkObjectParser.h"
+
+void SkJsonWriteBuffer::append(const char* type, const Json::Value& value) {
+    SkString fullName = SkStringPrintf("%02d_%s", fJson.size(), type);
+    fJson[fullName.c_str()] = value;
+}
+
+void SkJsonWriteBuffer::writeByteArray(const void* data, size_t size) {
+    Json::Value jsonArray(Json::arrayValue);
+    const uint8_t* bytes = reinterpret_cast<const uint8_t*>(data);
+    for (size_t i = 0; i < size; ++i) {
+        SkString hexByte = SkStringPrintf("%02x", bytes[i]);
+        jsonArray.append(hexByte.c_str());
+    }
+    this->append("byteArray", jsonArray);
+}
+
+void SkJsonWriteBuffer::writeBool(bool value) {
+    this->append("bool", value);
+}
+
+void SkJsonWriteBuffer::writeScalar(SkScalar value) {
+    this->append("scalar", value);
+}
+
+void SkJsonWriteBuffer::writeScalarArray(const SkScalar* value, uint32_t count) {
+    Json::Value jsonArray(Json::arrayValue);
+    for (uint32_t i = 0; i < count; ++i) {
+        jsonArray.append(value[i]);
+    }
+    this->append("scalarArray", jsonArray);
+}
+
+void SkJsonWriteBuffer::writeInt(int32_t value) {
+    this->append("int", value);
+}
+
+void SkJsonWriteBuffer::writeIntArray(const int32_t* value, uint32_t count) {
+    Json::Value jsonArray(Json::arrayValue);
+    for (uint32_t i = 0; i < count; ++i) {
+        jsonArray.append(value[i]);
+    }
+    this->append("intArray", jsonArray);
+}
+
+void SkJsonWriteBuffer::writeUInt(uint32_t value) {
+    this->append("uint", value);
+}
+
+void SkJsonWriteBuffer::writeString(const char* value) {
+    this->append("string", value);
+}
+
+void SkJsonWriteBuffer::writeFlattenable(const SkFlattenable* flattenable) {
+    if (flattenable) {
+        SkJsonWriteBuffer flattenableBuffer(fUrlDataManager);
+        flattenable->flatten(flattenableBuffer);
+        this->append(flattenable->getTypeName(), flattenableBuffer.getValue());
+    } else {
+        this->append("flattenable", Json::Value());
+    }
+}
+
+void SkJsonWriteBuffer::writeColor(SkColor color) {
+    this->append("color", SkDrawCommand::MakeJsonColor(color));
+}
+
+void SkJsonWriteBuffer::writeColorArray(const SkColor* color, uint32_t count) {
+    Json::Value jsonArray(Json::arrayValue);
+    for (uint32_t i = 0; i < count; ++i) {
+        jsonArray.append(SkDrawCommand::MakeJsonColor(color[i]));
+    }
+    this->append("colorArray", jsonArray);
+}
+
+void SkJsonWriteBuffer::writePoint(const SkPoint& point) {
+    this->append("point", SkDrawCommand::MakeJsonPoint(point));
+}
+
+void SkJsonWriteBuffer::writePointArray(const SkPoint* point, uint32_t count) {
+    Json::Value jsonArray(Json::arrayValue);
+    for (uint32_t i = 0; i < count; ++i) {
+        jsonArray.append(SkDrawCommand::MakeJsonPoint(point[i]));
+    }
+    this->append("pointArray", jsonArray);
+}
+
+void SkJsonWriteBuffer::writeMatrix(const SkMatrix& matrix) {
+    this->append("matrix", SkDrawCommand::MakeJsonMatrix(matrix));
+}
+
+void SkJsonWriteBuffer::writeIRect(const SkIRect& rect) {
+    this->append("irect", SkDrawCommand::MakeJsonIRect(rect));
+}
+
+void SkJsonWriteBuffer::writeRect(const SkRect& rect) {
+    this->append("rect", SkDrawCommand::MakeJsonRect(rect));
+}
+
+void SkJsonWriteBuffer::writeRegion(const SkRegion& region) {
+    this->append("region", SkDrawCommand::MakeJsonRegion(region));
+}
+
+void SkJsonWriteBuffer::writePath(const SkPath& path) {
+    this->append("path", SkDrawCommand::MakeJsonPath(path));
+}
+
+size_t SkJsonWriteBuffer::writeStream(SkStream* stream, size_t length) {
+    // Contents not supported
+    SkASSERT(length < Json::Value::maxUInt);
+    this->append("stream", static_cast<Json::UInt>(length));
+    return 0;
+}
+
+void SkJsonWriteBuffer::writeBitmap(const SkBitmap& bitmap) {
+    Json::Value jsonBitmap;
+    SkDrawCommand::flatten(bitmap, &jsonBitmap, *fUrlDataManager);
+    this->append("bitmap", jsonBitmap);
+}
+
+void SkJsonWriteBuffer::writeImage(const SkImage* image) {
+    Json::Value jsonImage;
+    SkDrawCommand::flatten(*image, &jsonImage, *fUrlDataManager);
+    this->append("image", jsonImage);
+}
+
+void SkJsonWriteBuffer::writeTypeface(SkTypeface* typeface) {
+    // Unsupported
+    this->append("typeface", Json::Value());
+}
+
+void SkJsonWriteBuffer::writePaint(const SkPaint& paint) {
+    this->append("paint", SkDrawCommand::MakeJsonPaint(paint, *fUrlDataManager));
+}