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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/android/jni_string.h"
#include "base/logging.h"
#include "jni/BitmapHelper_jni.h"
#include "skia/ext/image_operations.h"
#include "ui/gfx/size.h"
using base::android::AttachCurrentThread;
using base::android::ConvertUTF8ToJavaString;
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 RegisterNativesImpl(env);
}
static int SkColorTypeToBitmapFormat(SkColorType color_type) {
switch (color_type) {
case kAlpha_8_SkColorType:
return BITMAP_FORMAT_ALPHA_8;
case kARGB_4444_SkColorType:
return BITMAP_FORMAT_ARGB_4444;
case kN32_SkColorType:
return BITMAP_FORMAT_ARGB_8888;
case kRGB_565_SkColorType:
return BITMAP_FORMAT_RGB_565;
case kUnknown_SkColorType:
default:
NOTREACHED();
return BITMAP_FORMAT_NO_CONFIG;
}
}
ScopedJavaLocalRef<jobject> CreateJavaBitmap(int width,
int height,
SkColorType color_type) {
DCHECK_GT(width, 0);
DCHECK_GT(height, 0);
int java_bitmap_config = SkColorTypeToBitmapFormat(color_type);
return Java_BitmapHelper_createBitmap(
AttachCurrentThread(), width, height, java_bitmap_config);
}
ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(const SkBitmap* skbitmap) {
DCHECK(skbitmap);
DCHECK(!skbitmap->isNull());
SkColorType color_type = skbitmap->colorType();
DCHECK((color_type == kRGB_565_SkColorType) ||
(color_type == kN32_SkColorType));
ScopedJavaLocalRef<jobject> jbitmap = CreateJavaBitmap(
skbitmap->width(), skbitmap->height(), color_type);
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;
}
SkBitmap CreateSkBitmapFromAndroidResource(const char* name, gfx::Size size) {
DCHECK(name);
DCHECK(!size.IsEmpty());
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> jname(ConvertUTF8ToJavaString(env, name));
base::android::ScopedJavaLocalRef<jobject> jobj =
Java_BitmapHelper_decodeDrawableResource(
env, jname.obj(), size.width(), size.height());
if (jobj.is_null())
return SkBitmap();
SkBitmap bitmap = CreateSkBitmapFromJavaBitmap(gfx::JavaBitmap(jobj.obj()));
if (bitmap.isNull())
return bitmap;
return skia::ImageOperations::Resize(
bitmap, skia::ImageOperations::RESIZE_BOX, size.width(), size.height());
}
SkBitmap CreateSkBitmapFromJavaBitmap(const JavaBitmap& jbitmap) {
// TODO(jdduke): Convert to DCHECK's when sufficient data has been capture for
// crbug.com/341406.
CHECK_EQ(jbitmap.format(), ANDROID_BITMAP_FORMAT_RGBA_8888);
CHECK(!jbitmap.size().IsEmpty());
CHECK_GT(jbitmap.stride(), 0U);
CHECK(jbitmap.pixels());
gfx::Size src_size = jbitmap.size();
SkBitmap skbitmap;
if (!skbitmap.allocPixels(SkImageInfo::MakeN32Premul(src_size.width(),
src_size.height()),
jbitmap.stride())) {
LOG(FATAL) << " Failed to allocate bitmap of size " << src_size.width()
<< "x" << src_size.height() << " stride=" << jbitmap.stride();
}
const void* src_pixels = jbitmap.pixels();
void* dst_pixels = skbitmap.getPixels();
memcpy(dst_pixels, src_pixels, skbitmap.getSize());
return skbitmap;
}
SkColorType ConvertToSkiaColorType(jobject bitmap_config) {
int jbitmap_config = Java_BitmapHelper_getBitmapFormatForConfig(
AttachCurrentThread(), bitmap_config);
switch (jbitmap_config) {
case BITMAP_FORMAT_ALPHA_8:
return kAlpha_8_SkColorType;
case BITMAP_FORMAT_ARGB_4444:
return kARGB_4444_SkColorType;
case BITMAP_FORMAT_ARGB_8888:
return kN32_SkColorType;
case BITMAP_FORMAT_RGB_565:
return kRGB_565_SkColorType;
case BITMAP_FORMAT_NO_CONFIG:
default:
return kUnknown_SkColorType;
}
}
} // namespace gfx
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