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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 "SubsetSingleBench.h"
#include "SubsetBenchPriv.h"
#include "SkData.h"
#include "SkCodec.h"
#include "SkImageDecoder.h"
#include "SkOSFile.h"
#include "SkScanlineDecoder.h"
#include "SkStream.h"
/*
*
* This benchmark is designed to test the performance of subset decoding.
* It uses an input width, height, left, and top to decode a single subset.
*
*/
SubsetSingleBench::SubsetSingleBench(const SkString& path,
SkColorType colorType,
uint32_t subsetWidth,
uint32_t subsetHeight,
uint32_t offsetLeft,
uint32_t offsetTop,
bool useCodec)
: fColorType(colorType)
, fSubsetWidth(subsetWidth)
, fSubsetHeight(subsetHeight)
, fOffsetLeft(offsetLeft)
, fOffsetTop(offsetTop)
, fUseCodec(useCodec)
{
// Parse the filename
SkString baseName = SkOSPath::Basename(path.c_str());
// Choose an informative color name
const char* colorName = get_color_name(fColorType);
fName.printf("%sSubsetSingle_%dx%d +%d_+%d_%s_%s", fUseCodec ? "Codec" : "Image", fSubsetWidth,
fSubsetHeight, fOffsetLeft, fOffsetTop, baseName.c_str(), colorName);
// Perform the decode setup
SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(path.c_str()));
fStream.reset(new SkMemoryStream(encoded));
}
const char* SubsetSingleBench::onGetName() {
return fName.c_str();
}
bool SubsetSingleBench::isSuitableFor(Backend backend) {
return kNonRendering_Backend == backend;
}
void SubsetSingleBench::onDraw(const int n, SkCanvas* canvas) {
// When the color type is kIndex8, we will need to store the color table. If it is
// used, it will be initialized by the codec.
int colorCount;
SkPMColor colors[256];
if (fUseCodec) {
for (int count = 0; count < n; count++) {
SkAutoTDelete<SkScanlineDecoder> scanlineDecoder(
SkScanlineDecoder::NewFromStream(fStream->duplicate()));
const SkImageInfo info = scanlineDecoder->getInfo().makeColorType(fColorType);
SkAutoTDeleteArray<uint8_t> row(new uint8_t[info.minRowBytes()]);
scanlineDecoder->start(info, nullptr, colors, &colorCount);
SkBitmap bitmap;
SkImageInfo subsetInfo = info.makeWH(fSubsetWidth, fSubsetHeight);
alloc_pixels(&bitmap, subsetInfo, colors, colorCount);
scanlineDecoder->skipScanlines(fOffsetTop);
uint32_t bpp = info.bytesPerPixel();
for (uint32_t y = 0; y < fSubsetHeight; y++) {
scanlineDecoder->getScanlines(row.get(), 1, 0);
memcpy(bitmap.getAddr(0, y), row.get() + fOffsetLeft * bpp,
fSubsetWidth * bpp);
}
}
} else {
for (int count = 0; count < n; count++) {
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
int width, height;
decoder->buildTileIndex(fStream->duplicate(), &width, &height);
SkBitmap bitmap;
SkIRect rect = SkIRect::MakeXYWH(fOffsetLeft, fOffsetTop, fSubsetWidth,
fSubsetHeight);
decoder->decodeSubset(&bitmap, rect, fColorType);
}
}
}
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