c9e190ddac
Reason for revert: Need to somehow get access to encoders in chrome -- link error on the roll since SkImageEncoder is not built as part of chrome. Original issue's description: > change pixel-serializer to support reencoding existing data > > Trying to evolve this interface so it can > - support rich set of backend-encoders (including ones like ETC1 that can cheaply convert to KXT > - allow for encoding images as well as bitmaps (e.g. for picture serialization) > - perhaps replace SkImageEncoder as an API (assuming we create a factory that returns a serializer given a format) > > BUG=skia: > > Committed: https://skia.googlesource.com/skia/+/13f48dc85aa68a60da66aaf39c93d527d11d1278 TBR=scroggo@google.com,msarett@google.com NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=skia: Review URL: https://codereview.chromium.org/1371983003
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkImageEncoder_DEFINED
|
|
#define SkImageEncoder_DEFINED
|
|
|
|
#include "SkImageInfo.h"
|
|
#include "SkTRegistry.h"
|
|
|
|
class SkBitmap;
|
|
class SkData;
|
|
class SkWStream;
|
|
|
|
class SkImageEncoder {
|
|
public:
|
|
// TODO (scroggo): Merge with SkEncodedFormat.
|
|
enum Type {
|
|
kUnknown_Type,
|
|
kBMP_Type,
|
|
kGIF_Type,
|
|
kICO_Type,
|
|
kJPEG_Type,
|
|
kPNG_Type,
|
|
kWBMP_Type,
|
|
kWEBP_Type,
|
|
kKTX_Type,
|
|
};
|
|
static SkImageEncoder* Create(Type);
|
|
|
|
virtual ~SkImageEncoder();
|
|
|
|
/* Quality ranges from 0..100 */
|
|
enum {
|
|
kDefaultQuality = 80
|
|
};
|
|
|
|
/**
|
|
* Encode bitmap 'bm', returning the results in an SkData, at quality level
|
|
* 'quality' (which can be in range 0-100). If the bitmap cannot be
|
|
* encoded, return null. On success, the caller is responsible for
|
|
* calling unref() on the data when they are finished.
|
|
*/
|
|
SkData* encodeData(const SkBitmap&, int quality);
|
|
|
|
/**
|
|
* Encode bitmap 'bm' in the desired format, writing results to
|
|
* file 'file', at quality level 'quality' (which can be in range
|
|
* 0-100). Returns false on failure.
|
|
*/
|
|
bool encodeFile(const char file[], const SkBitmap& bm, int quality);
|
|
|
|
/**
|
|
* Encode bitmap 'bm' in the desired format, writing results to
|
|
* stream 'stream', at quality level 'quality' (which can be in
|
|
* range 0-100). Returns false on failure.
|
|
*/
|
|
bool encodeStream(SkWStream* stream, const SkBitmap& bm, int quality);
|
|
|
|
static SkData* EncodeData(const SkImageInfo&, const void* pixels, size_t rowBytes,
|
|
Type, int quality);
|
|
static SkData* EncodeData(const SkBitmap&, Type, int quality);
|
|
|
|
static bool EncodeFile(const char file[], const SkBitmap&, Type,
|
|
int quality);
|
|
static bool EncodeStream(SkWStream*, const SkBitmap&, Type,
|
|
int quality);
|
|
|
|
protected:
|
|
/**
|
|
* Encode bitmap 'bm' in the desired format, writing results to
|
|
* stream 'stream', at quality level 'quality' (which can be in
|
|
* range 0-100).
|
|
*
|
|
* This must be overridden by each SkImageEncoder implementation.
|
|
*/
|
|
virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) = 0;
|
|
};
|
|
|
|
// This macro declares a global (i.e., non-class owned) creation entry point
|
|
// for each encoder (e.g., CreateJPEGImageEncoder)
|
|
#define DECLARE_ENCODER_CREATOR(codec) \
|
|
SkImageEncoder *Create ## codec ();
|
|
|
|
// This macro defines the global creation entry point for each encoder. Each
|
|
// encoder implementation that registers with the encoder factory must call it.
|
|
#define DEFINE_ENCODER_CREATOR(codec) \
|
|
SkImageEncoder* Create##codec() { return new Sk##codec; }
|
|
|
|
// All the encoders known by Skia. Note that, depending on the compiler settings,
|
|
// not all of these will be available
|
|
/** An ARGBImageEncoder will always write out
|
|
* bitmap.width() * bitmap.height() * 4
|
|
* bytes.
|
|
*/
|
|
DECLARE_ENCODER_CREATOR(ARGBImageEncoder);
|
|
DECLARE_ENCODER_CREATOR(JPEGImageEncoder);
|
|
DECLARE_ENCODER_CREATOR(PNGImageEncoder);
|
|
DECLARE_ENCODER_CREATOR(KTXImageEncoder);
|
|
DECLARE_ENCODER_CREATOR(WEBPImageEncoder);
|
|
|
|
#ifdef SK_BUILD_FOR_IOS
|
|
DECLARE_ENCODER_CREATOR(PNGImageEncoder_IOS);
|
|
#endif
|
|
|
|
// Typedef to make registering encoder callback easier
|
|
// This has to be defined outside SkImageEncoder. :(
|
|
typedef SkTRegistry<SkImageEncoder*(*)(SkImageEncoder::Type)> SkImageEncoder_EncodeReg;
|
|
#endif
|