update headers

ios/include/matdbg/JsonWriter.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MATDBG_JSONWRITER_H
+#define MATDBG_JSONWRITER_H
+
+#include <filaflat/ChunkContainer.h>
+
+#include <backend/DriverEnums.h>
+
+#include <utils/CString.h>
+
+#include <private/filament/Variant.h>
+
+namespace filament {
+namespace matdbg {
+
+// This class generates portions of JSON messages that are sent to the web client.
+// Note that some portions of these JSON strings are generated by directly in DebugServer,
+// as well as CommonWriter.
+class JsonWriter {
+public:
+
+    // Retrieves the most recently generated string.
+    const char* getJsonString() const;
+    size_t getJsonSize() const;
+
+    // Generates a JSON string describing the given material.
+    bool writeMaterialInfo(const filaflat::ChunkContainer& package);
+
+    // Generates a JSON string describing the currently active variants.
+    //
+    // The array is of the form [ backend, shaderIndex0, shaderIndex1, ... ] where each
+    // shader index is an active variant. Each bit in the activeVariants bitmask
+    // represents one of the possible variant combinations.
+    bool writeActiveInfo(const filaflat::ChunkContainer& package, backend::Backend backend,
+            VariantList activeVariants);
+
+private:
+    utils::CString mJsonString;
+};
+
+} // namespace matdbg
+} // namespace filament
+
+#endif  // MATDBG_JSONWRITER_H