Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 1 | // Copyright (c) 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. |
| 4 | |
| 5 | #ifndef UI_GL_ANDROID_SURFACE_TEXTURE_BRIDGE_H_ |
| 6 | #define UI_GL_ANDROID_SURFACE_TEXTURE_BRIDGE_H_ |
| 7 | |
| 8 | #include <jni.h> |
| 9 | |
| 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" |
| 14 | |
| 15 | struct ANativeWindow; |
| 16 | |
| 17 | namespace gfx { |
| 18 | |
| 19 | // This class serves as a bridge for native code to call java functions inside |
| 20 | // android SurfaceTexture class. |
| 21 | class GL_EXPORT SurfaceTextureBridge |
| 22 | : public base::RefCountedThreadSafe<SurfaceTextureBridge>{ |
| 23 | public: |
| 24 | explicit SurfaceTextureBridge(int texture_id); |
| 25 | |
| 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); |
| 32 | |
| 33 | // Update the texture image to the most recent frame from the image stream. |
| 34 | void UpdateTexImage(); |
| 35 | |
| 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]); |
| 39 | |
| 40 | // Set the default size of the image buffers. |
| 41 | void SetDefaultBufferSize(int width, int height); |
| 42 | |
Torne (Richard Coles) | 90dce4d | 2013-05-29 14:40:03 +0100 | [diff] [blame] | 43 | // Attach the SurfaceTexture to the texture currently bound to |
| 44 | // GL_TEXTURE_EXTERNAL_OES. |
| 45 | void AttachToGLContext(); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 46 | |
| 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(); |
| 50 | |
| 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(); |
| 55 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 56 | const base::android::JavaRef<jobject>& j_surface_texture() const { |
| 57 | return j_surface_texture_; |
| 58 | } |
| 59 | |
| 60 | private: |
| 61 | friend class base::RefCountedThreadSafe<SurfaceTextureBridge>; |
| 62 | ~SurfaceTextureBridge(); |
| 63 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 64 | // Java SurfaceTexture instance. |
| 65 | base::android::ScopedJavaGlobalRef<jobject> j_surface_texture_; |
| 66 | |
| 67 | DISALLOW_COPY_AND_ASSIGN(SurfaceTextureBridge); |
| 68 | }; |
| 69 | |
| 70 | } // namespace gfx |
| 71 | |
| 72 | #endif // UI_GL_ANDROID_SURFACE_TEXTURE_BRIDGE_H_ |