SkRawCodec.h

Go to the documentation of this file.

/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef SkRawCodec_DEFINED
#define SkRawCodec_DEFINED
 
#include "include/codec/SkCodec.h"
#include "include/codec/SkEncodedImageFormat.h"
#include "include/core/SkSize.h"
#include "include/core/SkTypes.h"
 
#include <cstddef>
#include <memory>
 
class SkDngImage;
class SkStream;
struct SkImageInfo;
 
/*
 *
 * This class implements the decoding for RAW images
 *
 */
class SkRawCodec : public SkCodec {
public:
 
    /*
     * Creates a RAW decoder
     * Takes ownership of the stream
     */
    static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*);
 
    ~SkRawCodec() override;
 
protected:
 
    Result onGetPixels(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes, const Options&,
            int*) override;
 
    SkEncodedImageFormat onGetEncodedFormat() const override {
        return SkEncodedImageFormat::kDNG;
    }
 
    SkISize onGetScaledDimensions(float desiredScale) const override;
 
    bool onDimensionsSupported(const SkISize&) override;
 
    // SkCodec only applies the colorXform if it's necessary for color space
    // conversion. SkRawCodec will always convert, so tell SkCodec not to.
    bool usesColorXform() const override { return false; }
 
private:
 
    /*
     * Creates an instance of the decoder
     * Called only by NewFromStream, takes ownership of dngImage.
     */
    SkRawCodec(SkDngImage* dngImage);
 
    std::unique_ptr<SkDngImage> fDngImage;
 
    using INHERITED = SkCodec;
};
 
#endif