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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapFactory.h"
#include "SkBitmap.h"
#include "SkData.h"
#include "SkImageCache.h"
#include "SkImagePriv.h"
#include "SkLazyPixelRef.h"
SK_DEFINE_INST_COUNT(SkBitmapFactory::CacheSelector)
SkBitmapFactory::SkBitmapFactory(SkBitmapFactory::DecodeProc proc)
: fDecodeProc(proc)
, fImageCache(NULL)
, fCacheSelector(NULL) {
SkASSERT(fDecodeProc != NULL);
}
SkBitmapFactory::~SkBitmapFactory() {
SkSafeUnref(fImageCache);
SkSafeUnref(fCacheSelector);
}
void SkBitmapFactory::setImageCache(SkImageCache *cache) {
SkRefCnt_SafeAssign(fImageCache, cache);
if (cache != NULL) {
SkSafeUnref(fCacheSelector);
fCacheSelector = NULL;
}
}
void SkBitmapFactory::setCacheSelector(CacheSelector* selector) {
SkRefCnt_SafeAssign(fCacheSelector, selector);
if (selector != NULL) {
SkSafeUnref(fImageCache);
fImageCache = NULL;
}
}
bool SkBitmapFactory::installPixelRef(SkData* data, SkBitmap* dst) {
if (NULL == data || 0 == data->size() || dst == NULL) {
return false;
}
SkImage::Info info;
if (!fDecodeProc(data->data(), data->size(), &info, NULL)) {
return false;
}
SkBitmap::Config config = SkImageInfoToBitmapConfig(info);
Target target;
// FIMXE: There will be a problem if this rowbytes is calculated differently from
// in SkLazyPixelRef.
target.fRowBytes = SkImageMinRowBytes(info);
dst->setConfig(config, info.fWidth, info.fHeight, target.fRowBytes, info.fAlphaType);
// fImageCache and fCacheSelector are mutually exclusive.
SkASSERT(NULL == fImageCache || NULL == fCacheSelector);
SkImageCache* cache = NULL == fCacheSelector ? fImageCache : fCacheSelector->selectCache(info);
if (cache != NULL) {
// Now set a new LazyPixelRef on dst.
SkAutoTUnref<SkLazyPixelRef> lazyRef(SkNEW_ARGS(SkLazyPixelRef,
(data, fDecodeProc, cache)));
dst->setPixelRef(lazyRef);
return true;
} else {
dst->allocPixels();
target.fAddr = dst->getPixels();
return fDecodeProc(data->data(), data->size(), &info, &target);
}
}
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