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/*
* Copyright 2023 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkXmp_DEFINED
#define SkXmp_DEFINED
#include "include/core/SkRefCnt.h"
#include "include/private/base/SkAPI.h"
class SkData;
struct SkGainmapInfo;
#include <cstddef>
#include <memory>
/*
* An interface to extract information from XMP metadata.
*/
class SK_API SkXmp {
public:
SkXmp() = default;
virtual ~SkXmp() = default;
// Make noncopyable
SkXmp(const SkXmp&) = delete;
SkXmp& operator= (const SkXmp&) = delete;
// Create from XMP data.
static std::unique_ptr<SkXmp> Make(sk_sp<SkData> xmpData);
// Create from standard XMP + extended XMP data, see XMP Specification Part 3: Storage in files,
// Section 1.1.3.1: Extended XMP in JPEG
static std::unique_ptr<SkXmp> Make(sk_sp<SkData> xmpStandard, sk_sp<SkData> xmpExtended);
// Extract HDRGM gainmap parameters.
// TODO(b/338342146): Remove this once all callers are removed.
bool getGainmapInfoHDRGM(SkGainmapInfo* info) const { return getGainmapInfoAdobe(info); }
// Extract gainmap parameters from http://ns.adobe.com/hdr-gain-map/1.0/.
virtual bool getGainmapInfoAdobe(SkGainmapInfo* info) const = 0;
// If the image specifies http://ns.apple.com/pixeldatainfo/1.0/ AuxiliaryImageType of
// urn:com:apple:photo:2020:aux:hdrgainmap, and includes a http://ns.apple.com/HDRGainMap/1.0/
// HDRGainMapVersion, then populate |info| with gainmap parameters that will approximate the
// math specified at [0] and return true.
// [0] https://developer.apple.com/documentation/appkit/images_and_pdf/
// applying_apple_hdr_effect_to_your_photos
virtual bool getGainmapInfoApple(float exifHdrHeadroom, SkGainmapInfo* info) const = 0;
// If this includes GContainer metadata and the GContainer contains an item with semantic
// GainMap and Mime of image/jpeg, then return true, and populate |offset| and |size| with
// that item's offset (from the end of the primary JPEG image's EndOfImage), and the size of
// the gainmap.
virtual bool getContainerGainmapLocation(size_t* offset, size_t* size) const = 0;
// Return the GUID of an Extended XMP if present, or null otherwise.
virtual const char* getExtendedXmpGuid() const = 0;
};
#endif
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