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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 "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(const ScopedJavaSurface&) = delete;
- ScopedJavaSurface& operator=(const ScopedJavaSurface&) = delete;
- ~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_;
- };
- } // namespace gl
- #endif // UI_GL_ANDROID_SCOPED_JAVA_SURFACE_H_
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