1 files changed, 83 insertions, 0 deletions
diff --git a/libs/hwui/jni/Utils.h b/libs/hwui/jni/Utils.h
new file mode 100644
index 000000000000..89255177ba2e
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+++ b/libs/hwui/jni/Utils.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2006 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 _ANDROID_GRAPHICS_UTILS_H_
+#define _ANDROID_GRAPHICS_UTILS_H_
+
+#include "SkStream.h"
+
+#include <jni.h>
+#include <androidfw/Asset.h>
+
+namespace android {
+
+class AssetStreamAdaptor : public SkStreamRewindable {
+public:
+    explicit AssetStreamAdaptor(Asset*);
+
+    virtual bool rewind();
+    virtual size_t read(void* buffer, size_t size);
+    virtual bool hasLength() const { return true; }
+    virtual size_t getLength() const;
+    virtual bool hasPosition() const;
+    virtual size_t getPosition() const;
+    virtual bool seek(size_t position);
+    virtual bool move(long offset);
+    virtual bool isAtEnd() const;
+
+protected:
+    SkStreamRewindable* onDuplicate() const override;
+
+private:
+    Asset* fAsset;
+};
+
+/**
+ *  Make a deep copy of the asset, and return it as a stream, or NULL if there
+ *  was an error.
+ *  FIXME: If we could "ref/reopen" the asset, we may not need to copy it here.
+ */
+
+SkMemoryStream* CopyAssetToStream(Asset*);
+
+/** Restore the file descriptor's offset in our destructor
+ */
+class AutoFDSeek {
+public:
+    explicit AutoFDSeek(int fd) : fFD(fd) {
+        fCurr = ::lseek(fd, 0, SEEK_CUR);
+    }
+    ~AutoFDSeek() {
+        if (fCurr >= 0) {
+            ::lseek(fFD, fCurr, SEEK_SET);
+        }
+    }
+private:
+    int     fFD;
+    off64_t   fCurr;
+};
+
+jobject nullObjectReturn(const char msg[]);
+
+/** Check if the file descriptor is seekable.
+ */
+bool isSeekable(int descriptor);
+
+JNIEnv* get_env_or_die(JavaVM* jvm);
+
+}; // namespace android
+
+#endif  // _ANDROID_GRAPHICS_UTILS_H_