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/*
* 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 "SkBitmapRegionCanvas.h"
#include "SkBitmapRegionCodec.h"
#include "SkBitmapRegionDecoderInterface.h"
#include "SkBitmapRegionSampler.h"
#include "SkAndroidCodec.h"
#include "SkCodec.h"
#include "SkCodecPriv.h"
#include "SkImageDecoder.h"
SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder(
SkData* data, Strategy strategy) {
switch (strategy) {
case kOriginal_Strategy: {
SkAutoTDelete<SkStreamRewindable> stream(new SkMemoryStream(data));
SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
int width, height;
if (nullptr == decoder) {
SkCodecPrintf("Error: Could not create image decoder.\n");
return nullptr;
}
if (!decoder->buildTileIndex(stream.detach(), &width, &height)) {
SkCodecPrintf("Error: Could not build tile index.\n");
delete decoder;
return nullptr;
}
return new SkBitmapRegionSampler(decoder, width, height);
}
case kCanvas_Strategy: {
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(data));
if (nullptr == codec) {
SkCodecPrintf("Error: Failed to create decoder.\n");
return nullptr;
}
switch (codec->getScanlineOrder()) {
case SkCodec::kTopDown_SkScanlineOrder:
case SkCodec::kNone_SkScanlineOrder:
break;
default:
SkCodecPrintf("Error: Scanline ordering not supported.\n");
return nullptr;
}
return new SkBitmapRegionCanvas(codec.detach());
}
case kAndroidCodec_Strategy: {
SkAutoTDelete<SkAndroidCodec> codec = SkAndroidCodec::NewFromData(data);
if (NULL == codec) {
SkCodecPrintf("Error: Failed to create codec.\n");
return NULL;
}
return new SkBitmapRegionCodec(codec.detach());
}
default:
SkASSERT(false);
return nullptr;
}
}
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