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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 "SkCodecImageGenerator.h"
SkImageGenerator* SkCodecImageGenerator::NewFromEncodedCodec(sk_sp<SkData> data) {
SkCodec* codec = SkCodec::NewFromData(data);
if (nullptr == codec) {
return nullptr;
}
return new SkCodecImageGenerator(codec, data);
}
static SkImageInfo make_premul(const SkImageInfo& info) {
if (kUnpremul_SkAlphaType == info.alphaType()) {
return info.makeAlphaType(kPremul_SkAlphaType);
}
return info;
}
SkCodecImageGenerator::SkCodecImageGenerator(SkCodec* codec, sk_sp<SkData> data)
: INHERITED(make_premul(codec->getInfo()))
, fCodec(codec)
, fData(std::move(data))
{}
SkData* SkCodecImageGenerator::onRefEncodedData(GrContext* ctx) {
return SkRef(fData.get());
}
bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
SkPMColor ctable[], int* ctableCount) {
SkCodec::Result result = fCodec->getPixels(info, pixels, rowBytes, nullptr, ctable,
ctableCount);
switch (result) {
case SkCodec::kSuccess:
case SkCodec::kIncompleteInput:
return true;
default:
return false;
}
}
bool SkCodecImageGenerator::onComputeScaledDimensions(SkScalar scale, SupportedSizes* sizes) {
SkASSERT(scale > 0 && scale <= 1);
const auto size = fCodec->getScaledDimensions(SkScalarToFloat(scale));
if (size == this->getInfo().dimensions()) {
return false;
}
// FIXME: Make SkCodec's API return two potential sizes, like this one. For now, set them both
// to be the same.
sizes->fSizes[0] = sizes->fSizes[1] = size;
return true;
}
bool SkCodecImageGenerator::onGenerateScaledPixels(const SkPixmap& pixmap) {
if (pixmap.colorType() == kIndex_8_SkColorType) {
// There is no way to tell the client about the color table with this API.
return false;
}
return this->onGetPixels(pixmap.info(), pixmap.writable_addr(), pixmap.rowBytes(),
nullptr, nullptr);
}
bool SkCodecImageGenerator::onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const
{
return fCodec->queryYUV8(sizeInfo, colorSpace);
}
bool SkCodecImageGenerator::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) {
SkCodec::Result result = fCodec->getYUV8Planes(sizeInfo, planes);
switch (result) {
case SkCodec::kSuccess:
case SkCodec::kIncompleteInput:
return true;
default:
return false;
}
}
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