SkColorSpaceXformSteps.h

Go to the documentation of this file.

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef SkColorSpaceXformSteps_DEFINED
#define SkColorSpaceXformSteps_DEFINED
 
#include "modules/skcms/skcms.h"
 
#include <cstdint>
 
class SkColorSpace;
class SkRasterPipeline;
enum SkAlphaType : int;
 
struct SkColorSpaceXformSteps {
 
    struct Flags {
        bool unpremul         = false;
        bool linearize        = false;
        bool gamut_transform  = false;
        bool encode           = false;
        bool premul           = false;
 
        constexpr uint32_t mask() const {
            return (unpremul        ?  1 : 0)
                 | (linearize       ?  2 : 0)
                 | (gamut_transform ?  4 : 0)
                 | (encode          ?  8 : 0)
                 | (premul          ? 16 : 0);
        }
    };
 
    SkColorSpaceXformSteps() {}
    SkColorSpaceXformSteps(const SkColorSpace* src, SkAlphaType srcAT,
                           const SkColorSpace* dst, SkAlphaType dstAT);
 
    template <typename S, typename D>
    SkColorSpaceXformSteps(const S& src, const D& dst)
        : SkColorSpaceXformSteps(src.colorSpace(), src.alphaType(),
                                 dst.colorSpace(), dst.alphaType()) {}
 
    void apply(float rgba[4]) const;
    void apply(SkRasterPipeline*) const;
 
    Flags flags;
 
    skcms_TransferFunction srcTF,     // Apply for linearize.
                           dstTFInv;  // Apply for encode.
    float src_to_dst_matrix[9];       // Apply this 3x3 column-major matrix for gamut_transform.
};
 
#endif//SkColorSpaceXformSteps_DEFINED