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      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 #include "ui/gl/android/surface_texture.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/SurfaceTexturePlatformWrapper_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 SurfaceTexture::SurfaceTexture(int texture_id) {
     30   JNIEnv* env = base::android::AttachCurrentThread();
     31   j_surface_texture_.Reset(
     32       Java_SurfaceTexturePlatformWrapper_create(env, texture_id));
     33 }
     34 
     35 SurfaceTexture::~SurfaceTexture() {
     36   JNIEnv* env = base::android::AttachCurrentThread();
     37   Java_SurfaceTexturePlatformWrapper_destroy(env, j_surface_texture_.obj());
     38 }
     39 
     40 void SurfaceTexture::SetFrameAvailableCallback(
     41     const base::Closure& callback) {
     42   JNIEnv* env = base::android::AttachCurrentThread();
     43   Java_SurfaceTexturePlatformWrapper_setFrameAvailableCallback(
     44       env,
     45       j_surface_texture_.obj(),
     46       reinterpret_cast<intptr_t>(new SurfaceTextureListener(callback)));
     47 }
     48 
     49 void SurfaceTexture::UpdateTexImage() {
     50   JNIEnv* env = base::android::AttachCurrentThread();
     51   Java_SurfaceTexturePlatformWrapper_updateTexImage(env,
     52                                                     j_surface_texture_.obj());
     53 }
     54 
     55 void SurfaceTexture::GetTransformMatrix(float mtx[16]) {
     56   JNIEnv* env = base::android::AttachCurrentThread();
     57 
     58   base::android::ScopedJavaLocalRef<jfloatArray> jmatrix(
     59       env, env->NewFloatArray(16));
     60   Java_SurfaceTexturePlatformWrapper_getTransformMatrix(
     61       env, j_surface_texture_.obj(), jmatrix.obj());
     62 
     63   jboolean is_copy;
     64   jfloat* elements = env->GetFloatArrayElements(jmatrix.obj(), &is_copy);
     65   for (int i = 0; i < 16; ++i) {
     66     mtx[i] = static_cast<float>(elements[i]);
     67   }
     68   env->ReleaseFloatArrayElements(jmatrix.obj(), elements, JNI_ABORT);
     69 }
     70 
     71 void SurfaceTexture::SetDefaultBufferSize(int width, int height) {
     72   JNIEnv* env = base::android::AttachCurrentThread();
     73 
     74   if (width > 0 && height > 0) {
     75     Java_SurfaceTexturePlatformWrapper_setDefaultBufferSize(
     76         env, j_surface_texture_.obj(), static_cast<jint>(width),
     77         static_cast<jint>(height));
     78   } else {
     79     LOG(WARNING) << "Not setting surface texture buffer size - "
     80                     "width or height is 0";
     81   }
     82 }
     83 
     84 void SurfaceTexture::AttachToGLContext() {
     85   if (GlContextMethodsAvailable()) {
     86     int texture_id;
     87     glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id);
     88     DCHECK(texture_id);
     89     JNIEnv* env = base::android::AttachCurrentThread();
     90     Java_SurfaceTexturePlatformWrapper_attachToGLContext(
     91         env, j_surface_texture_.obj(), texture_id);
     92   }
     93 }
     94 
     95 void SurfaceTexture::DetachFromGLContext() {
     96   if (GlContextMethodsAvailable()) {
     97     JNIEnv* env = base::android::AttachCurrentThread();
     98     Java_SurfaceTexturePlatformWrapper_detachFromGLContext(
     99         env, j_surface_texture_.obj());
    100   }
    101 }
    102 
    103 ANativeWindow* SurfaceTexture::CreateSurface() {
    104   JNIEnv* env = base::android::AttachCurrentThread();
    105   ScopedJavaSurface surface(this);
    106   ANativeWindow* native_window = ANativeWindow_fromSurface(
    107       env, surface.j_surface().obj());
    108   return native_window;
    109 }
    110 
    111 // static
    112 bool SurfaceTexture::RegisterSurfaceTexture(JNIEnv* env) {
    113   return RegisterNativesImpl(env);
    114 }
    115 
    116 }  // namespace gfx
    117