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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_ANDROID_SCOPED_JAVA_SURFACE_H_
#define UI_GL_ANDROID_SCOPED_JAVA_SURFACE_H_
#include <jni.h>
#include "base/android/scoped_java_ref.h"
#include "base/macros.h"
#include "ui/gl/gl_export.h"
namespace gl {
class SurfaceTexture;
// A helper class for holding a scoped reference to a Java Surface instance.
// When going out of scope, Surface.release() is called on the Java object to
// make sure server-side references (esp. wrt graphics memory) are released.
class GL_EXPORT ScopedJavaSurface {
public:
ScopedJavaSurface();
// Wraps an existing Java Surface object in a ScopedJavaSurface.
explicit ScopedJavaSurface(const base::android::JavaRef<jobject>& surface);
// Creates a Java Surface from a SurfaceTexture and wraps it in a
// ScopedJavaSurface.
explicit ScopedJavaSurface(const SurfaceTexture* surface_texture);
// Move constructor. Take the surface from another ScopedJavaSurface object,
// the latter no longer owns the surface afterwards.
ScopedJavaSurface(ScopedJavaSurface&& rvalue);
ScopedJavaSurface& operator=(ScopedJavaSurface&& rhs);
// Creates a ScopedJavaSurface that is owned externally, i.e.,
// someone else is responsible to call Surface.release().
static ScopedJavaSurface AcquireExternalSurface(
const base::android::JavaRef<jobject>& surface);
~ScopedJavaSurface();
// Checks whether the surface is an empty one.
bool IsEmpty() const;
// Checks whether this object references a valid surface.
bool IsValid() const;
// Checks whether the surface is hardware protected so that no readback is
// possible.
bool is_protected() const { return is_protected_; }
const base::android::JavaRef<jobject>& j_surface() const {
return j_surface_;
}
private:
// Performs destructive move from |other| to this.
void MoveFrom(ScopedJavaSurface& other);
void ReleaseSurfaceIfNeeded();
bool auto_release_ = true;
bool is_protected_ = false;
base::android::ScopedJavaGlobalRef<jobject> j_surface_;
DISALLOW_COPY_AND_ASSIGN(ScopedJavaSurface);
};
} // namespace gl
#endif // UI_GL_ANDROID_SCOPED_JAVA_SURFACE_H_
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