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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "BitmapAllocatorAndroid.h"
#include "SharedBufferStream.h"
#include "SkImageRef_GlobalPool.h"
#include "SkImageRef_ashmem.h"
// made this up, so we don't waste a file-descriptor on small images, plus
// we don't want to lose too much on the round-up to a page size (4K)
#define MIN_ASHMEM_ALLOC_SIZE (32*1024)
static bool should_use_ashmem(const SkBitmap& bm) {
return bm.getSize() >= MIN_ASHMEM_ALLOC_SIZE;
}
///////////////////////////////////////////////////////////////////////////////
namespace WebCore {
BitmapAllocatorAndroid::BitmapAllocatorAndroid(SharedBuffer* data,
int sampleSize)
{
fStream = new SharedBufferStream(data);
fSampleSize = sampleSize;
}
BitmapAllocatorAndroid::~BitmapAllocatorAndroid()
{
fStream->unref();
}
bool BitmapAllocatorAndroid::allocPixelRef(SkBitmap* bitmap, SkColorTable*)
{
SkPixelRef* ref;
if (should_use_ashmem(*bitmap)) {
// SkDebugf("ashmem [%d %d]\n", bitmap->width(), bitmap->height());
ref = new SkImageRef_ashmem(fStream, bitmap->config(), fSampleSize);
} else {
// SkDebugf("globalpool [%d %d]\n", bitmap->width(), bitmap->height());
ref = new SkImageRef_GlobalPool(fStream, bitmap->config(), fSampleSize);
}
bitmap->setPixelRef(ref)->unref();
return true;
}
}
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