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. 4 5 #ifndef UI_GL_ANDROID_SURFACE_TEXTURE_H_ 6 #define UI_GL_ANDROID_SURFACE_TEXTURE_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 SurfaceTexture 22 : public base::RefCountedThreadSafe<SurfaceTexture>{ 23 public: 24 explicit SurfaceTexture(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 43 // Attach the SurfaceTexture to the texture currently bound to 44 // GL_TEXTURE_EXTERNAL_OES. 45 void AttachToGLContext(); 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 56 const base::android::JavaRef<jobject>& j_surface_texture() const { 57 return j_surface_texture_; 58 } 59 60 static bool RegisterSurfaceTexture(JNIEnv* env); 61 62 private: 63 friend class base::RefCountedThreadSafe<SurfaceTexture>; 64 ~SurfaceTexture(); 65 66 // Java SurfaceTexture instance. 67 base::android::ScopedJavaGlobalRef<jobject> j_surface_texture_; 68 69 DISALLOW_COPY_AND_ASSIGN(SurfaceTexture); 70 }; 71 72 } // namespace gfx 73 74 #endif // UI_GL_ANDROID_SURFACE_TEXTURE_H_ 75
