add image-from-codec to c api

include/c/sk_data.h

Index: include/c/sk_data.h
diff --git a/include/c/sk_data.h b/include/c/sk_data.h
new file mode 100644
index 0000000000000000000000000000000000000000..90863ee8893c7b5da2b8f63ad98680091172e01f
--- /dev/null
+++ b/include/c/sk_data.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL EXPERIMENTAL
+// DO NOT USE -- FOR INTERNAL TESTING ONLY
+
+#ifndef sk_data_DEFINED
+#define sk_data_DEFINED
+
+#include "sk_types.h"
+
+SK_C_PLUS_PLUS_BEGIN_GUARD
+
+sk_data_t* sk_data_new_empty();
+sk_data_t* sk_data_new_with_copy(const void* src, size_t length);
+sk_data_t* sk_data_new_from_malloc(const void* memory, size_t length);
+sk_data_t* sk_data_new_subset(const sk_data_t* src, size_t offset, size_t length);
+
+void sk_data_ref(const sk_data_t*);
+void sk_data_unref(const sk_data_t*);
+
+size_t sk_data_get_size(const sk_data_t*);
+const void* sk_data_get_data(const sk_data_t*);
+
+SK_C_PLUS_PLUS_END_GUARD
+
+#endif