7571f9e490
Mechanically updated via Xcode "Replace Regular Expression":
typedef (.*) INHERITED;
-->
using INHERITED = $1;
The ClangTidy approach generated an even larger CL which would have
required a significant amount of hand-tweaking to be usable.
Change-Id: I671dc9d9efdf6d60151325c8d4d13fad7e10a15b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/314999
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkJpegEncoder_DEFINED
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#define SkJpegEncoder_DEFINED
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#include "include/encode/SkEncoder.h"
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class SkJpegEncoderMgr;
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class SkWStream;
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class SK_API SkJpegEncoder : public SkEncoder {
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public:
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enum class AlphaOption {
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kIgnore,
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kBlendOnBlack,
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};
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enum class Downsample {
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/**
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* Reduction by a factor of two in both the horizontal and vertical directions.
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*/
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k420,
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/**
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* Reduction by a factor of two in the horizontal direction.
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*/
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k422,
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/**
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* No downsampling.
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*/
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k444,
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};
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struct Options {
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/**
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* |fQuality| must be in [0, 100] where 0 corresponds to the lowest quality.
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*/
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int fQuality = 100;
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/**
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* Choose the downsampling factor for the U and V components. This is only
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* meaningful if the |src| is not kGray, since kGray will not be encoded as YUV.
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*
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* Our default value matches the libjpeg-turbo default.
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*/
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Downsample fDownsample = Downsample::k420;
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/**
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* Jpegs must be opaque. This instructs the encoder on how to handle input
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* images with alpha.
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*
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* The default is to ignore the alpha channel and treat the image as opaque.
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* Another option is to blend the pixels onto a black background before encoding.
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* In the second case, the encoder supports linear or legacy blending.
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*/
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AlphaOption fAlphaOption = AlphaOption::kIgnore;
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};
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/**
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* Encode the |src| pixels to the |dst| stream.
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* |options| may be used to control the encoding behavior.
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*
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* Returns true on success. Returns false on an invalid or unsupported |src|.
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*/
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static bool Encode(SkWStream* dst, const SkPixmap& src, const Options& options);
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/**
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* Create a jpeg encoder that will encode the |src| pixels to the |dst| stream.
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* |options| may be used to control the encoding behavior.
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*
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* |dst| is unowned but must remain valid for the lifetime of the object.
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*
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* This returns nullptr on an invalid or unsupported |src|.
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*/
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static std::unique_ptr<SkEncoder> Make(SkWStream* dst, const SkPixmap& src,
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const Options& options);
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~SkJpegEncoder() override;
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protected:
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bool onEncodeRows(int numRows) override;
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private:
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SkJpegEncoder(std::unique_ptr<SkJpegEncoderMgr>, const SkPixmap& src);
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std::unique_ptr<SkJpegEncoderMgr> fEncoderMgr;
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using INHERITED = SkEncoder;
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};
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#endif
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