SkValues.h

/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#ifndef SkValues_DEFINED
#define SkValues_DEFINED

#define SK_TAGGED_UNION_U_1(X)      X* f##X;
#define SK_TAGGED_UNION_U_2(X, ...) X* f##X; SK_TAGGED_UNION_U_1(__VA_ARGS__)
#define SK_TAGGED_UNION_U_3(X, ...) X* f##X; SK_TAGGED_UNION_U_2(__VA_ARGS__)
#define SK_TAGGED_UNION_U_4(X, ...) X* f##X; SK_TAGGED_UNION_U_3(__VA_ARGS__)
#define SK_TAGGED_UNION_U_5(X, ...) X* f##X; SK_TAGGED_UNION_U_4(__VA_ARGS__)
#define SK_TAGGED_UNION_U_6(X, ...) X* f##X; SK_TAGGED_UNION_U_5(__VA_ARGS__)
#define SK_TAGGED_UNION_U_7(X, ...) X* f##X; SK_TAGGED_UNION_U_6(__VA_ARGS__)
#define SK_TAGGED_UNION_U_8(X, ...) X* f##X; SK_TAGGED_UNION_U_7(__VA_ARGS__)
#define SK_TAGGED_UNION_U_9(X, ...) X* f##X; SK_TAGGED_UNION_U_8(__VA_ARGS__)
#define SK_TAGGED_UNION_U_10(X, ...) X* f##X; SK_TAGGED_UNION_U_9(__VA_ARGS__)
#define SK_TAGGED_UNION_U_11(X, ...) X* f##X; SK_TAGGED_UNION_U_10(__VA_ARGS__)
#define SK_TAGGED_UNION_U_12(X, ...) X* f##X; SK_TAGGED_UNION_U_11(__VA_ARGS__)
#define SK_TAGGED_UNION_U_13(X, ...) X* f##X; SK_TAGGED_UNION_U_12(__VA_ARGS__)
#define SK_TAGGED_UNION_U_14(X, ...) X* f##X; SK_TAGGED_UNION_U_13(__VA_ARGS__)
#define SK_TAGGED_UNION_U_15(X, ...) X* f##X; SK_TAGGED_UNION_U_14(__VA_ARGS__)
#define SK_TAGGED_UNION_U_16(X, ...) X* f##X; SK_TAGGED_UNION_U_15(__VA_ARGS__)
#define SK_TAGGED_UNION_U_17(X, ...) X* f##X; SK_TAGGED_UNION_U_16(__VA_ARGS__)
#define SK_TAGGED_UNION_U_18(X, ...) X* f##X; SK_TAGGED_UNION_U_17(__VA_ARGS__)
#define SK_TAGGED_UNION_CAT0(x, y) x ## y
#define SK_TAGGED_UNION_CAT(x, y) SK_TAGGED_UNION_CAT0(x, y)
#define SK_TAGGED_UNION_NARGS_SEQ(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,N,...) N
#define SK_TAGGED_UNION_NARGS(...) \
    SK_TAGGED_UNION_NARGS_SEQ(__VA_ARGS__,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1)
#define SK_TAGGED_UNION_MAKE_PTRS(...) SK_TAGGED_UNION_CAT(SK_TAGGED_UNION_U_, SK_TAGGED_UNION_NARGS(__VA_ARGS__))(__VA_ARGS__)
#define SK_TAGGED_UNION(STRUCT_NAME, ...)                    \
    struct STRUCT_NAME {                                  \
        enum class Type { __VA_ARGS__ };                  \
        Type fType;                                       \
        union { SK_TAGGED_UNION_MAKE_PTRS(__VA_ARGS__) };                 \
    };

namespace SkValue {

struct SrcOverXfermode_v1 {};
struct ArithmeticXfermode_v1 {};
struct LerpXfermode_v1 {};
struct PixelXorXfermode_v1 {};
struct ProcCoeffXfermode_v1 {};

SK_TAGGED_UNION(
        Xfermode_v1,
        SrcOverXfermode_v1,
        ArithmeticXfermode_v1,
        LerpXfermode_v1,
        PixelXorXfermode_v1,
        ProcCoeffXfermode_v1)
/*
struct Xfermode_v1 {
    enum class Type {
        SrcOverXfermode_v1,
        ArithmeticXfermode_v1,
        LerpXfermode_v1,
        PixelXorXfermode_v1,
        ProcCoeffXfermode_v1
    };
    Type fType;
    union {
        SrcOverXfermode_v1*    fSrcOverXfermode_v1;
        ArithmeticXfermode_v1* fArithmeticXfermode_v1;
        LerpXfermode_v1*       fLerpXfermode_v1;
        PixelXorXfermode_v1*   fPixelXorXfermode_v1;
        ProcCoeffXfermode_v1*  fProcCoeffXfermode_v1;
    };
};
*/

struct BitmapProcShader_v1 {};
struct ThreeDeeShader_v1 {};
struct ColorFilterShader_v1 {};
struct ComposeShader_v1 {};
struct LightingShader_v1 {};
struct LightingShader_Light_v1 {};
struct LocalMatrixShader_v1 {};
struct PictureShader_v1 {};
struct ColorShader_v1 {};
struct PerlinNoiseShader_v1 {};
struct LinearGradientShader_v1 {};
struct RadialGradientShader_v1 {};
struct SweepGradientShader_v1 {};
struct TwoPointConicalGradientShader_v1 {};
struct ImageShader_v1 {};

SK_TAGGED_UNION(
        Shader_v1,
        BitmapProcShader_v1,
        ThreeDeeShader_v1,
        ColorFilterShader_v1,
        ComposeShader_v1,
        LightingShader_v1,
        LightingShader_Light_v1,
        LocalMatrixShader_v1,
        PictureShader_v1,
        ColorShader_v1,
        PerlinNoiseShader_v1,
        LinearGradientShader_v1,
        RadialGradientShader_v1,
        SweepGradientShader_v1,
        TwoPointConicalGradientShader_v1,
        ImageShader_v1)

/*
struct Shader_v1 {
    enum class Type {
        BitmapProcShader_v1,
        ThreeDeeShader_v1,
        ColorFilterShader_v1,
        ComposeShader_v1,
        LightingShader_v1,
        LightingShader_Light_v1,
        LocalMatrixShader_v1,
        PictureShader_v1,
        ColorShader_v1,
        PerlinNoiseShader_v1,
        LinearGradientShader_v1,
        RadialGradientShader_v1,
        SweepGradientShader_v1,
        TwoPointConicalGradientShader_v1,
        ImageShader_v1
    };
    Type fType;
    union {
        BitmapProcShader_v1*              fBitmapProcShader_v1;
        ThreeDeeShader_v1*                fThreeDeeShader_v1;
        ColorFilterShader_v1*             fColorFilterShader_v1;
        ComposeShader_v1*                 fComposeShader_v1;
        LightingShader_v1*                fLightingShader_v1;
        LightingShader_Light_v1*          fLightingShader_Light_v1;
        LocalMatrixShader_v1*             fLocalMatrixShader_v1;
        PictureShader_v1*                 fPictureShader_v1;
        ColorShader_v1*                   fColorShader_v1;
        PerlinNoiseShader_v1*             fPerlinNoiseShader_v1;
        LinearGradientShader_v1*          fLinearGradientShader_v1;
        RadialGradientShader_v1*          fRadialGradientShader_v1;
        SweepGradientShader_v1*           fSweepGradientShader_v1;
        TwoPointConicalGradientShader_v1* fTwoPointConicalGradientShader_v1;
        ImageShader_v1*                   fImageShader_v1;
    };
};
*/

} // namespace

#undef SK_TAGGED_UNION_U_1
#undef SK_TAGGED_UNION_U_2
#undef SK_TAGGED_UNION_U_3
#undef SK_TAGGED_UNION_U_4
#undef SK_TAGGED_UNION_U_5
#undef SK_TAGGED_UNION_U_6
#undef SK_TAGGED_UNION_U_7
#undef SK_TAGGED_UNION_U_8
#undef SK_TAGGED_UNION_U_9
#undef SK_TAGGED_UNION_U_10
#undef SK_TAGGED_UNION_U_11
#undef SK_TAGGED_UNION_U_12
#undef SK_TAGGED_UNION_U_13
#undef SK_TAGGED_UNION_U_14
#undef SK_TAGGED_UNION_U_15
#undef SK_TAGGED_UNION_U_16
#undef SK_TAGGED_UNION_U_17
#undef SK_TAGGED_UNION_U_18
#undef SK_TAGGED_UNION_CAT0
#undef SK_TAGGED_UNION_CAT
#undef SK_TAGGED_UNION_NARGS_SEQ
#undef SK_TAGGED_UNION_NARGS
#undef SK_TAGGED_UNION_MAKE_PTRS
#undef SK_TAGGED_UNION

#endif  // SkValues_DEFINED