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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/android/jni_helper.h"
#include <android/bitmap.h>
#include <vector>
#include "base/android/jni_android.h"
#include "base/android/jni_helper.h"
#include "base/android/jni_string.h"
#include "base/debug/trace_event.h"
#include "base/logging.h"
#include "jni/jni_helper_jni.h"
#include "third_party/skia/include/core/SkBitmap.h"
using base::android::AttachCurrentThread;
using base::android::CheckException;
using base::android::GetStaticMethodID;
using base::android::GetClass;
using base::android::GetMethodID;
using base::android::ScopedJavaLocalRef;
AutoLocalFrame::AutoLocalFrame(int capacity) {
AttachCurrentThread()->PushLocalFrame(capacity);
}
AutoLocalFrame::~AutoLocalFrame() {
AttachCurrentThread()->PopLocalFrame(NULL);
}
AutoLockJavaBitmap::AutoLockJavaBitmap(jobject bitmap) :
bitmap_(bitmap),
pixels_(NULL) {
int err = AndroidBitmap_lockPixels(AttachCurrentThread(), bitmap_, &pixels_);
DCHECK(!err);
DCHECK(pixels_);
}
AutoLockJavaBitmap::~AutoLockJavaBitmap() {
// TODO(aelias): Add AndroidBitmap_notifyPixelsChanged() call here
// once it's added to the NDK. Using hardware bitmaps will
// be broken until this is fixed.
int err = AndroidBitmap_unlockPixels(AttachCurrentThread(), bitmap_);
DCHECK(!err);
}
gfx::Size AutoLockJavaBitmap::size() const {
AndroidBitmapInfo info;
int err = AndroidBitmap_getInfo(AttachCurrentThread(), bitmap_, &info);
DCHECK(!err);
return gfx::Size(info.width, info.height);
}
int AutoLockJavaBitmap::format() const {
AndroidBitmapInfo info;
int err = AndroidBitmap_getInfo(AttachCurrentThread(), bitmap_, &info);
DCHECK(!err);
return info.format;
}
uint32_t AutoLockJavaBitmap::stride() const {
AndroidBitmapInfo info;
int err = AndroidBitmap_getInfo(AttachCurrentThread(), bitmap_, &info);
DCHECK(!err);
return info.stride;
}
void PrintJavaStackTrace() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jclass> throwable_clazz =
GetClass(env, "java/lang/Throwable");
jmethodID throwable_constructor =
GetMethodID(env, throwable_clazz, "<init>", "()V");
ScopedJavaLocalRef<jobject> throwable_object(env,
env->NewObject(throwable_clazz.obj(), throwable_constructor));
DCHECK(!throwable_object.is_null());
jmethodID printstacktrace =
GetMethodID(env, throwable_clazz, "printStackTrace", "()V");
env->CallVoidMethod(throwable_object.obj(), printstacktrace);
CheckException(env);
}
void ConvertJavaArrayOfStringsToVectorOfStrings(
JNIEnv* env,
jobjectArray jstrings,
std::vector<std::string>* vec) {
vec->clear();
jsize length = env->GetArrayLength(jstrings);
for (jsize i = 0; i < length; ++i) {
jstring item = static_cast<jstring>(
env->GetObjectArrayElement(jstrings, i));
vec->push_back(base::android::ConvertJavaStringToUTF8(env, item));
env->DeleteLocalRef(item);
}
}
ScopedJavaLocalRef<jobject> CreateJavaBitmap(const gfx::Size& size, bool keep) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> bitmap =
Java_JNIHelper_createJavaBitmap(env, size.width(), size.height(), keep);
CheckException(env);
return bitmap;
}
void DeleteJavaBitmap(jobject bitmap) {
JNIEnv* env = AttachCurrentThread();
Java_JNIHelper_deleteJavaBitmap(env, bitmap);
CheckException(env);
}
void PaintJavaBitmapToJavaBitmap(jobject source_bitmap,
const gfx::Rect& source_rect,
jobject dest_bitmap,
const gfx::Rect& dest_rect) {
TRACE_EVENT0("jni", "PaintJavaBitmapToJavaBitmap");
JNIEnv* env = AttachCurrentThread();
Java_JNIHelper_paintJavaBitmapToJavaBitmap(env,
source_bitmap,
source_rect.x(),
source_rect.y(),
source_rect.right(),
source_rect.bottom(),
dest_bitmap,
dest_rect.x(),
dest_rect.y(),
dest_rect.right(),
dest_rect.bottom());
CheckException(env);
}
ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(const SkBitmap* skbitmap) {
TRACE_EVENT0("jni", "ConvertToJavaBitmap");
DCHECK(skbitmap);
DCHECK_EQ(skbitmap->bytesPerPixel(), 4);
// Create a temporary java bitmap.
ScopedJavaLocalRef<jobject> jbitmap =
CreateJavaBitmap(gfx::Size(skbitmap->width(), skbitmap->height()), false);
// Lock and copy the pixels from the skbitmap.
SkAutoLockPixels src_lock(*skbitmap);
AutoLockJavaBitmap dst_lock(jbitmap.obj());
void* src_pixels = skbitmap->getPixels();
void* dst_pixels = dst_lock.pixels();
memcpy(dst_pixels, src_pixels, skbitmap->getSize());
return jbitmap;
}
bool RegisterJniHelper(JNIEnv* env) {
return RegisterNativesImpl(env);
}
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