1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_GL_ANDROID_SURFACE_TEXTURE_H_
6 #define UI_GL_ANDROID_SURFACE_TEXTURE_H_
10 #include "base/android/scoped_java_ref.h"
11 #include "base/callback.h"
12 #include "base/memory/ref_counted.h"
13 #include "ui/gl/gl_export.h"
19 // This class serves as a bridge for native code to call java functions inside
20 // android SurfaceTexture class.
21 class GL_EXPORT SurfaceTexture
22 : public base::RefCountedThreadSafe<SurfaceTexture>{
24 explicit SurfaceTexture(int texture_id);
26 // Set the listener callback, which will be invoked on the same thread that
27 // is being called from here for registration.
28 // Note: Since callbacks come in from Java objects that might outlive objects
29 // being referenced from the callback, the only robust way here is to create
30 // the callback from a weak pointer to your object.
31 void SetFrameAvailableCallback(const base::Closure& callback);
33 // Update the texture image to the most recent frame from the image stream.
34 void UpdateTexImage();
36 // Retrieve the 4x4 texture coordinate transform matrix associated with the
37 // texture image set by the most recent call to updateTexImage.
38 void GetTransformMatrix(float mtx[16]);
40 // Set the default size of the image buffers.
41 void SetDefaultBufferSize(int width, int height);
43 // Attach the SurfaceTexture to the texture currently bound to
44 // GL_TEXTURE_EXTERNAL_OES.
45 void AttachToGLContext();
47 // Detaches the SurfaceTexture from the context that owns its current GL
48 // texture. Must be called with that context current on the calling thread.
49 void DetachFromGLContext();
51 // Creates a native render surface for this surface texture.
52 // The caller must release the underlying reference when done with the handle
53 // by calling ANativeWindow_release().
54 ANativeWindow* CreateSurface();
56 const base::android::JavaRef<jobject>& j_surface_texture() const {
57 return j_surface_texture_;
60 static bool RegisterSurfaceTexture(JNIEnv* env);
63 friend class base::RefCountedThreadSafe<SurfaceTexture>;
66 // Java SurfaceTexture instance.
67 base::android::ScopedJavaGlobalRef<jobject> j_surface_texture_;
69 DISALLOW_COPY_AND_ASSIGN(SurfaceTexture);
74 #endif // UI_GL_ANDROID_SURFACE_TEXTURE_H_