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      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 #include "ui/gl/android/surface_texture_bridge.h"
      6 
      7 #include <android/native_window_jni.h>
      8 
      9 // TODO(boliu): Remove this include when we move off ICS.
     10 #include "base/android/build_info.h"
     11 #include "base/android/jni_android.h"
     12 #include "base/logging.h"
     13 #include "jni/SurfaceTextureBridge_jni.h"
     14 #include "ui/gl/android/scoped_java_surface.h"
     15 #include "ui/gl/android/surface_texture_listener.h"
     16 #include "ui/gl/gl_bindings.h"
     17 
     18 // TODO(boliu): Remove this method when when we move off ICS. See
     19 // http://crbug.com/161864.
     20 bool GlContextMethodsAvailable() {
     21   bool available = base::android::BuildInfo::GetInstance()->sdk_int() >= 16;
     22   if (!available)
     23     LOG(WARNING) << "Running on unsupported device: rendering may not work";
     24   return available;
     25 }
     26 
     27 namespace gfx {
     28 
     29 SurfaceTextureBridge::SurfaceTextureBridge(int texture_id) {
     30   JNIEnv* env = base::android::AttachCurrentThread();
     31   j_surface_texture_.Reset(Java_SurfaceTextureBridge_create(env, texture_id));
     32 }
     33 
     34 SurfaceTextureBridge::~SurfaceTextureBridge() {
     35   JNIEnv* env = base::android::AttachCurrentThread();
     36   Java_SurfaceTextureBridge_destroy(env, j_surface_texture_.obj());
     37 }
     38 
     39 void SurfaceTextureBridge::SetFrameAvailableCallback(
     40     const base::Closure& callback) {
     41   JNIEnv* env = base::android::AttachCurrentThread();
     42   Java_SurfaceTextureBridge_setFrameAvailableCallback(
     43       env,
     44       j_surface_texture_.obj(),
     45       reinterpret_cast<int>(new SurfaceTextureListener(callback)));
     46 }
     47 
     48 void SurfaceTextureBridge::UpdateTexImage() {
     49   JNIEnv* env = base::android::AttachCurrentThread();
     50   Java_SurfaceTextureBridge_updateTexImage(env, j_surface_texture_.obj());
     51 }
     52 
     53 void SurfaceTextureBridge::GetTransformMatrix(float mtx[16]) {
     54   JNIEnv* env = base::android::AttachCurrentThread();
     55 
     56   base::android::ScopedJavaLocalRef<jfloatArray> jmatrix(
     57       env, env->NewFloatArray(16));
     58   Java_SurfaceTextureBridge_getTransformMatrix(
     59       env, j_surface_texture_.obj(), jmatrix.obj());
     60 
     61   jboolean is_copy;
     62   jfloat* elements = env->GetFloatArrayElements(jmatrix.obj(), &is_copy);
     63   for (int i = 0; i < 16; ++i) {
     64     mtx[i] = static_cast<float>(elements[i]);
     65   }
     66   env->ReleaseFloatArrayElements(jmatrix.obj(), elements, JNI_ABORT);
     67 }
     68 
     69 void SurfaceTextureBridge::SetDefaultBufferSize(int width, int height) {
     70   JNIEnv* env = base::android::AttachCurrentThread();
     71 
     72   if (width > 0 && height > 0) {
     73     Java_SurfaceTextureBridge_setDefaultBufferSize(
     74         env, j_surface_texture_.obj(), static_cast<jint>(width),
     75         static_cast<jint>(height));
     76   } else {
     77     LOG(WARNING) << "Not setting surface texture buffer size - "
     78                     "width or height is 0";
     79   }
     80 }
     81 
     82 void SurfaceTextureBridge::AttachToGLContext() {
     83   if (GlContextMethodsAvailable()) {
     84     int texture_id;
     85     glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id);
     86     DCHECK(texture_id);
     87     JNIEnv* env = base::android::AttachCurrentThread();
     88     Java_SurfaceTextureBridge_attachToGLContext(
     89         env, j_surface_texture_.obj(), texture_id);
     90   }
     91 }
     92 
     93 void SurfaceTextureBridge::DetachFromGLContext() {
     94   if (GlContextMethodsAvailable()) {
     95     JNIEnv* env = base::android::AttachCurrentThread();
     96     Java_SurfaceTextureBridge_detachFromGLContext(
     97         env, j_surface_texture_.obj());
     98   }
     99 }
    100 
    101 ANativeWindow* SurfaceTextureBridge::CreateSurface() {
    102   JNIEnv* env = base::android::AttachCurrentThread();
    103   ScopedJavaSurface surface(this);
    104   ANativeWindow* native_window = ANativeWindow_fromSurface(
    105       env, surface.j_surface().obj());
    106   return native_window;
    107 }
    108 
    109 // static
    110 bool SurfaceTextureBridge::RegisterSurfaceTextureBridge(JNIEnv* env) {
    111   return RegisterNativesImpl(env);
    112 }
    113 
    114 }  // namespace gfx
    115