retrace: Put JSON writer behind an ABC.

So that we can later dump state in formats other than JSON.

1 files changed, 81 insertions, 0 deletions

diff --git a/retrace/state_writer.cpp b/retrace/state_writer.cpp
new file mode 100644
index 00000000..7e491c6c
--- /dev/null
+++ b/retrace/state_writer.cpp
@@ -0,0 +1,81 @@
+/**************************************************************************
+ *
+ * Copyright 2015 VMware, Inc
+ * Copyright 2011 Jose Fonseca
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include "state_writer.hpp"
+
+#include <assert.h>
+
+#include <sstream>
+
+#include "image.hpp"
+
+
+StateWriter::~StateWriter()
+{
+}
+
+
+void
+StateWriter::writeImage(image::Image *image,
+                        const ImageDesc & desc)
+{
+    assert(image);
+    if (!image) {
+        writeNull();
+        return;
+    }
+
+    beginObject();
+
+    // Tell the GUI this is no ordinary object, but an image
+    writeStringMember("__class__", "image");
+
+    writeIntMember("__width__", image->width);
+    writeIntMember("__height__", image->height / desc.depth);
+    writeIntMember("__depth__", desc.depth);
+
+    writeStringMember("__format__", desc.format.c_str());
+
+    if (!image->label.empty()) {
+        writeStringMember("__label__", image->label.c_str());
+    }
+
+    beginMember("__data__");
+    std::stringstream ss;
+
+    if (image->channelType == image::TYPE_UNORM8) {
+        image->writePNG(ss);
+    } else {
+        image->writePNM(ss);
+    }
+
+    const std::string & s = ss.str();
+    writeBlob(s.data(), s.size());
+    endMember(); // __data__
+
+    endObject();
+}