chromium/third_party/skia/include/encode/SkJpegEncoder.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 SkJpegEncoder_DEFINED
#define SkJpegEncoder_DEFINED

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

#include <memory>

class SkColorSpace;
class SkData;
class SkEncoder;
class SkPixmap;
class SkWStream;
class SkImage;
class GrDirectContext;
class SkYUVAPixmaps;
struct skcms_ICCProfile;

namespace SkJpegEncoder {

enum class AlphaOption { … };

enum class Downsample { … };

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);
SK_API bool Encode(SkWStream* dst,
                   const SkYUVAPixmaps& src,
                   const SkColorSpace* srcColorSpace,
                   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 jpeg encoder that will encode the |src| pixels to the |dst| stream.
 *  |options| may be used to control the encoding behavior.
 *
 *  |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);
SK_API std::unique_ptr<SkEncoder> Make(SkWStream* dst,
                                       const SkYUVAPixmaps& src,
                                       const SkColorSpace* srcColorSpace,
                                       const Options& options);
}  // namespace SkJpegEncoder

#endif