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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 "ui/gfx/android/java_bitmap.h"
#include <android/bitmap.h>
#include "base/logging.h"
#include "jni/BitmapHelper_jni.h"
#include "skia/ext/image_operations.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/size.h"
using base::android::AttachCurrentThread;
namespace gfx {
JavaBitmap::JavaBitmap(jobject bitmap)
: bitmap_(bitmap),
pixels_(NULL) {
int err = AndroidBitmap_lockPixels(AttachCurrentThread(), bitmap_, &pixels_);
DCHECK(!err);
DCHECK(pixels_);
AndroidBitmapInfo info;
err = AndroidBitmap_getInfo(AttachCurrentThread(), bitmap_, &info);
DCHECK(!err);
size_ = gfx::Size(info.width, info.height);
format_ = info.format;
stride_ = info.stride;
}
JavaBitmap::~JavaBitmap() {
int err = AndroidBitmap_unlockPixels(AttachCurrentThread(), bitmap_);
DCHECK(!err);
}
// static
bool JavaBitmap::RegisterJavaBitmap(JNIEnv* env) {
return ui::RegisterNativesImpl(env);
}
static ScopedJavaLocalRef<jobject> CreateJavaBitmap(const gfx::Size& size) {
return ui::Java_BitmapHelper_createBitmap(AttachCurrentThread(),
size.width(), size.height());
}
ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(const SkBitmap* skbitmap) {
DCHECK(skbitmap);
DCHECK_EQ(skbitmap->bytesPerPixel(), 4);
ScopedJavaLocalRef<jobject> jbitmap =
CreateJavaBitmap(gfx::Size(skbitmap->width(), skbitmap->height()));
SkAutoLockPixels src_lock(*skbitmap);
JavaBitmap dst_lock(jbitmap.obj());
void* src_pixels = skbitmap->getPixels();
void* dst_pixels = dst_lock.pixels();
memcpy(dst_pixels, src_pixels, skbitmap->getSize());
return jbitmap;
}
static ScopedJavaLocalRef<jobject> CreateJavaBitmapFromResource(
const char* name, gfx::Size requested_size) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> jname(env, env->NewStringUTF(name));
return ui::Java_BitmapHelper_decodeDrawableResource(env,
jname.obj(),
requested_size.width(),
requested_size.height());
}
static SkBitmap ConvertToSkBitmap(ScopedJavaLocalRef<jobject> jbitmap) {
if (jbitmap.is_null())
return SkBitmap();
JavaBitmap src_lock(jbitmap.obj());
DCHECK_EQ(src_lock.format(), ANDROID_BITMAP_FORMAT_RGBA_8888);
gfx::Size src_size = src_lock.size();
SkBitmap skbitmap;
skbitmap.setConfig(SkBitmap::kARGB_8888_Config,
src_size.width(), src_size.height(), src_lock.stride());
skbitmap.allocPixels();
SkAutoLockPixels dst_lock(skbitmap);
void* src_pixels = src_lock.pixels();
void* dst_pixels = skbitmap.getPixels();
memcpy(dst_pixels, src_pixels, skbitmap.getSize());
return skbitmap;
}
SkBitmap CreateSkBitmapFromResource(const char* name, gfx::Size size) {
DCHECK(!size.IsEmpty());
SkBitmap bitmap =
ConvertToSkBitmap(CreateJavaBitmapFromResource(name, size));
if (bitmap.isNull())
return bitmap;
return skia::ImageOperations::Resize(bitmap,
skia::ImageOperations::RESIZE_GOOD,
size.width(), size.height());
}
} // namespace gfx
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