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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 scoped_refptr<SurfaceTexture> SurfaceTexture::Create(int texture_id) {
     30   JNIEnv* env = base::android::AttachCurrentThread();
     31   return new SurfaceTexture(
     32       Java_SurfaceTexturePlatformWrapper_create(env, texture_id));
     33 }
     34 
     35 scoped_refptr<SurfaceTexture> SurfaceTexture::CreateSingleBuffered(
     36     int texture_id) {
     37   DCHECK(IsSingleBufferModeSupported());
     38   JNIEnv* env = base::android::AttachCurrentThread();
     39   return new SurfaceTexture(
     40       Java_SurfaceTexturePlatformWrapper_createSingleBuffered(env, texture_id));
     41 }
     42 
     43 SurfaceTexture::SurfaceTexture(
     44     const base::android::ScopedJavaLocalRef<jobject>& j_surface_texture) {
     45   j_surface_texture_.Reset(j_surface_texture);
     46 }
     47 
     48 SurfaceTexture::~SurfaceTexture() {
     49   JNIEnv* env = base::android::AttachCurrentThread();
     50   Java_SurfaceTexturePlatformWrapper_destroy(env, j_surface_texture_.obj());
     51 }
     52 
     53 void SurfaceTexture::SetFrameAvailableCallback(
     54     const base::Closure& callback) {
     55   JNIEnv* env = base::android::AttachCurrentThread();
     56   Java_SurfaceTexturePlatformWrapper_setFrameAvailableCallback(
     57       env,
     58       j_surface_texture_.obj(),
     59       reinterpret_cast<intptr_t>(new SurfaceTextureListener(callback)));
     60 }
     61 
     62 void SurfaceTexture::UpdateTexImage() {
     63   JNIEnv* env = base::android::AttachCurrentThread();
     64   Java_SurfaceTexturePlatformWrapper_updateTexImage(env,
     65                                                     j_surface_texture_.obj());
     66 }
     67 
     68 void SurfaceTexture::ReleaseTexImage() {
     69   DCHECK(IsSingleBufferModeSupported());
     70   JNIEnv* env = base::android::AttachCurrentThread();
     71   Java_SurfaceTexturePlatformWrapper_releaseTexImage(env,
     72                                                      j_surface_texture_.obj());
     73 }
     74 
     75 void SurfaceTexture::GetTransformMatrix(float mtx[16]) {
     76   JNIEnv* env = base::android::AttachCurrentThread();
     77 
     78   base::android::ScopedJavaLocalRef<jfloatArray> jmatrix(
     79       env, env->NewFloatArray(16));
     80   Java_SurfaceTexturePlatformWrapper_getTransformMatrix(
     81       env, j_surface_texture_.obj(), jmatrix.obj());
     82 
     83   jboolean is_copy;
     84   jfloat* elements = env->GetFloatArrayElements(jmatrix.obj(), &is_copy);
     85   for (int i = 0; i < 16; ++i) {
     86     mtx[i] = static_cast<float>(elements[i]);
     87   }
     88   env->ReleaseFloatArrayElements(jmatrix.obj(), elements, JNI_ABORT);
     89 }
     90 
     91 void SurfaceTexture::SetDefaultBufferSize(int width, int height) {
     92   JNIEnv* env = base::android::AttachCurrentThread();
     93 
     94   if (width > 0 && height > 0) {
     95     Java_SurfaceTexturePlatformWrapper_setDefaultBufferSize(
     96         env, j_surface_texture_.obj(), static_cast<jint>(width),
     97         static_cast<jint>(height));
     98   } else {
     99     LOG(WARNING) << "Not setting surface texture buffer size - "
    100                     "width or height is 0";
    101   }
    102 }
    103 
    104 void SurfaceTexture::AttachToGLContext() {
    105   if (GlContextMethodsAvailable()) {
    106     int texture_id;
    107     glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id);
    108     DCHECK(texture_id);
    109     JNIEnv* env = base::android::AttachCurrentThread();
    110     Java_SurfaceTexturePlatformWrapper_attachToGLContext(
    111         env, j_surface_texture_.obj(), texture_id);
    112   }
    113 }
    114 
    115 void SurfaceTexture::DetachFromGLContext() {
    116   if (GlContextMethodsAvailable()) {
    117     JNIEnv* env = base::android::AttachCurrentThread();
    118     Java_SurfaceTexturePlatformWrapper_detachFromGLContext(
    119         env, j_surface_texture_.obj());
    120   }
    121 }
    122 
    123 ANativeWindow* SurfaceTexture::CreateSurface() {
    124   JNIEnv* env = base::android::AttachCurrentThread();
    125   ScopedJavaSurface surface(this);
    126   // Note: This ensures that any local references used by
    127   // ANativeWindow_fromSurface are released immediately. This is needed as a
    128   // workaround for https://code.google.com/p/android/issues/detail?id=68174
    129   base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
    130   ANativeWindow* native_window = ANativeWindow_fromSurface(
    131       env, surface.j_surface().obj());
    132   return native_window;
    133 }
    134 
    135 // static
    136 bool SurfaceTexture::IsSingleBufferModeSupported() {
    137   return base::android::BuildInfo::GetInstance()->sdk_int() >= 19;
    138 }
    139 
    140 bool SurfaceTexture::RegisterSurfaceTexture(JNIEnv* env) {
    141   return RegisterNativesImpl(env);
    142 }
    143 
    144 }  // namespace gfx
    145