blob: ec36bc75e94e00edd22b857b179a9033a95fe5c1 [file] [log] [blame]
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCodec.h"
#include "SkData.h"
#include "SkCodec_libpng.h"
#include "SkStream.h"
SkCodec* SkCodec::NewFromStream(SkStream* stream) {
if (!stream) {
return NULL;
}
SkAutoTDelete<SkStream> streamDeleter(stream);
const bool isPng = SkPngCodec::IsPng(stream);
// TODO: Avoid rewinding.
if (!stream->rewind()) {
return NULL;
}
if (isPng) {
streamDeleter.detach();
return SkPngCodec::NewFromStream(stream);
}
// TODO: Check other image types.
return NULL;
}
SkCodec* SkCodec::NewFromData(SkData* data) {
if (!data) {
return NULL;
}
return NewFromStream(SkNEW_ARGS(SkMemoryStream, (data)));
}
SkCodec::SkCodec(const SkImageInfo& info, SkStream* stream)
: fInfo(info)
, fStream(stream)
, fNeedsRewind(false)
{}
bool SkCodec::rewindIfNeeded() {
// Store the value of fNeedsRewind so we can update it. Next read will
// require a rewind.
const bool neededRewind = fNeedsRewind;
fNeedsRewind = true;
return !neededRewind || fStream->rewind();
}