chromium/third_party/skia/include/encode/SkPngEncoder.h

/*
 * Copyright 2017 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkPngEncoder_DEFINED
#define SkPngEncoder_DEFINED

#include "include/core/SkDataTable.h"
#include "include/core/SkRefCnt.h"
#include "include/private/base/SkAPI.h"

// TODO(kjlubick) update clients to directly include this
#include "include/encode/SkEncoder.h"  // IWYU pragma: keep

#include <memory>

class GrDirectContext;
class SkData;
class SkImage;
class SkPixmap;
class SkWStream;
struct skcms_ICCProfile;

namespace SkPngEncoder {

enum class FilterFlag : int { … };

inline FilterFlag operator|(FilterFlag x, FilterFlag y) { … }

struct Options { … };

/**
 *  Encode the |src| pixels to the |dst| stream.
 *  |options| may be used to control the encoding behavior.
 *
 *  Returns true on success.  Returns false on an invalid or unsupported |src|.
 */
SK_API bool Encode(SkWStream* dst, const SkPixmap& src, const Options& options);

/**
*  Encode the provided image and return the resulting bytes. If the image was created as
*  a texture-backed image on a GPU context, that |ctx| must be provided so the pixels
*  can be read before being encoded. For raster-backed images, |ctx| can be nullptr.
*  |options| may be used to control the encoding behavior.
*
*  Returns nullptr if the pixels could not be read or encoding otherwise fails.
*/
SK_API sk_sp<SkData> Encode(GrDirectContext* ctx, const SkImage* img, const Options& options);

/**
 *  Create a png encoder that will encode the |src| pixels to the |dst| stream.
 *  |options| may be used to control the encoding behavior.
 *
 *  The primary use of this is incremental encoding of the pixels.
 *
 *  |dst| is unowned but must remain valid for the lifetime of the object.
 *
 *  This returns nullptr on an invalid or unsupported |src|.
 */
SK_API std::unique_ptr<SkEncoder> Make(SkWStream* dst, const SkPixmap& src, const Options& options);

}  // namespace SkPngEncoder

#endif