Make SkPicture/SkImageGenerator default to SkCodec

src/ports/SkImageGenerator_skia.cpp

 /*
  * Copyright 2015 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
-#include "SkImageDecoder.h"
-#include "SkImageGenerator.h"
-#include "SkStream.h"
-
-class BareMemoryAllocator : public SkBitmap::Allocator {
-    const SkImageInfo   fInfo;
-    void* const         fMemory;
-    const size_t        fRowBytes;
-
-public:
-    BareMemoryAllocator(const SkImageInfo& info, void* memory, size_t rowBytes)
-        : fInfo(info), fMemory(memory), fRowBytes(rowBytes)
-    {}
-
-protected:
-    bool allocPixelRef(SkBitmap* bm, SkColorTable* ctable) override {
-        const SkImageInfo bmi = bm->info();
-        if (bmi.width() != fInfo.width() || bmi.height() != fInfo.height() ||
-            bmi.colorType() != fInfo.colorType())
-        {
-            return false;
-        }
-        return bm->installPixels(bmi, fMemory, fRowBytes, ctable, nullptr, nullptr);
-    }
-};
-
-class SkImageDecoderGenerator : public SkImageGenerator {
-    const SkImageInfo               fInfo;
-    SkAutoTDelete<SkImageDecoder>   fDecoder;
-    SkAutoTUnref<SkData>            fData;
-
-public:
-    SkImageDecoderGenerator(const SkImageInfo& info, SkImageDecoder* decoder, SkData* data)
-        : INHERITED(info), fInfo(info), fDecoder(decoder), fData(SkRef(data))
-    {}
-
-protected:
-    SkData* onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) override {
-        return SkRef(fData.get());
-    }
-    bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
-                     SkPMColor ctableEntries[], int* ctableCount) override {
-        SkMemoryStream stream(fData->data(), fData->size(), false);
-        SkAutoTUnref<BareMemoryAllocator> allocator(
-                new BareMemoryAllocator(info, pixels, rowBytes));
-        fDecoder->setAllocator(allocator);
-        fDecoder->setRequireUnpremultipliedColors(kUnpremul_SkAlphaType == info.alphaType());
-
-        SkBitmap bm;
-        const SkImageDecoder::Result result = fDecoder->decode(&stream, &bm, info.colorType(),
-                                                               SkImageDecoder::kDecodePixels_Mode);
-        if (SkImageDecoder::kFailure == result) {
-            return false;
-        }
-
-        SkASSERT(info.colorType() == bm.info().colorType());
-
-        if (kIndex_8_SkColorType == info.colorType()) {
-            SkASSERT(ctableEntries);
-
-            SkColorTable* ctable = bm.getColorTable();
-            if (nullptr == ctable) {
-                return false;
-            }
-            const int count = ctable->count();
-            memcpy(ctableEntries, ctable->readColors(), count * sizeof(SkPMColor));
-            *ctableCount = count;
-        }
-        return true;
-    }
-
-    bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
-                         SkYUVColorSpace* colorSpace) override {
-        SkMemoryStream stream(fData->data(), fData->size(), false);
-        return fDecoder->decodeYUV8Planes(&stream, sizes, planes, rowBytes, colorSpace);
-    }
-
-private:
-    typedef SkImageGenerator INHERITED;
-};
+#include "SkCodecImageGenerator.h"
 
 SkImageGenerator* SkImageGenerator::NewFromEncodedImpl(SkData* data) {
-    SkMemoryStream stream(data->data(), data->size(), false);
-    SkImageDecoder* decoder = SkImageDecoder::Factory(&stream);
-    if (nullptr == decoder) {
-        return nullptr;
-    }
-
-    SkBitmap bm;
-    stream.rewind();
-    if (!decoder->decode(&stream, &bm, kUnknown_SkColorType, SkImageDecoder::kDecodeBounds_Mode)) {
-        delete decoder;
-        return nullptr;
-    }
-
-    return new SkImageDecoderGenerator(bm.info(), decoder, data);
+    return SkCodecImageGenerator::NewFromEncodedCodec(data);
 }