Stop testing SkImageDecoder in DM/nanobench

bench/DecodingBench.cpp

-/*
- * 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 "CodecBenchPriv.h"
-#include "DecodingBench.h"
-#include "SkBitmap.h"
-#include "SkData.h"
-#include "SkImageDecoder.h"
-#include "SkMallocPixelRef.h"
-#include "SkOSFile.h"
-#include "SkStream.h"
-
-/*
- *
- * This benchmark is designed to test the performance of image decoding.
- * It is invoked from the nanobench.cpp file.
- *
- */
-DecodingBench::DecodingBench(SkString path, SkColorType colorType)
-    : fColorType(colorType)
-    , fData(SkData::NewFromFileName(path.c_str()))
-{
-    // Parse filename and the color type to give the benchmark a useful name
-    SkString baseName = SkOSPath::Basename(path.c_str());
-    fName.printf("Decode_%s_%s", baseName.c_str(), color_type_to_str(colorType));
-
-#ifdef SK_DEBUG
-    // Ensure that we can create a decoder.
-    SkAutoTDelete<SkStreamRewindable> stream(new SkMemoryStream(fData));
-    SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
-    SkASSERT(decoder != nullptr);
-#endif
-}
-
-const char* DecodingBench::onGetName() {
-    return fName.c_str();
-}
-
-bool DecodingBench::isSuitableFor(Backend backend) {
-    return kNonRendering_Backend == backend;
-}
-
-void DecodingBench::onDelayedSetup() {
-    // Allocate the pixels now, to remove it from the loop.
-    SkAutoTDelete<SkStreamRewindable> stream(new SkMemoryStream(fData));
-    SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
-    SkBitmap bm;
-#ifdef SK_DEBUG
-    SkImageDecoder::Result result =
-#endif
-    decoder->decode(stream, &bm, fColorType, SkImageDecoder::kDecodeBounds_Mode);
-    SkASSERT(SkImageDecoder::kFailure != result);
-
-    const size_t rowBytes = bm.info().minRowBytes();
-    fPixelStorage.reset(bm.info().getSafeSize(rowBytes));
-}
-
-// Allocator which just uses an existing block of memory.
-class TargetAllocator : public SkBitmap::Allocator {
-public:
-    explicit TargetAllocator(void* storage)
-        : fPixelStorage(storage) {}
-
-    bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) override {
-        // We depend on the fact that this will only ever be used to
-        // decode to a bitmap with the same settings used to create
-        // fPixelStorage.
-        bm->setPixelRef(SkMallocPixelRef::NewDirect(bm->info(),
-                fPixelStorage, bm->rowBytes(), ct))->unref();
-        return true;
-    }
-
-private:
-    void* fPixelStorage; // Unowned. DecodingBench owns this.
-};
-
-void DecodingBench::onDraw(int n, SkCanvas* canvas) {
-    SkBitmap bitmap;
-    // Declare the allocator before the decoder, so it will outlive the
-    // decoder, which will unref it.
-    TargetAllocator allocator(fPixelStorage.get());
-    SkAutoTDelete<SkImageDecoder> decoder;
-    SkAutoTDelete<SkStreamRewindable> stream;
-    for (int i = 0; i < n; i++) {
-        // create a new stream and a new decoder to mimic the behavior of
-        // CodecBench.
-        stream.reset(new SkMemoryStream(fData));
-        decoder.reset(SkImageDecoder::Factory(stream));
-        decoder->setAllocator(&allocator);
-        decoder->decode(stream, &bitmap, fColorType,
-                        SkImageDecoder::kDecodePixels_Mode);
-    }
-}