SkGradientShader.h

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkGradientShader_DEFINED
#define SkGradientShader_DEFINED

#include "SkShader.h"

class SK_API SkGradientShader {
public:
    enum Flags {
        kInterpolateColorsInPremul_Flag = 1 << 0,
    };

    static sk_sp<SkShader> MakeLinear(const SkPoint pts[2],
                                      const SkColor colors[], const SkScalar pos[], int count,
                                      SkShader::TileMode mode,
                                      uint32_t flags, const SkMatrix* localMatrix);
    static sk_sp<SkShader> MakeLinear(const SkPoint pts[2],
                                      const SkColor colors[], const SkScalar pos[], int count,
                                      SkShader::TileMode mode) {
        return MakeLinear(pts, colors, pos, count, mode, 0, NULL);
    }

    static sk_sp<SkShader> MakeRadial(const SkPoint& center, SkScalar radius,
                                      const SkColor colors[], const SkScalar pos[], int count,
                                      SkShader::TileMode mode,
                                      uint32_t flags, const SkMatrix* localMatrix);
    static sk_sp<SkShader> MakeRadial(const SkPoint& center, SkScalar radius,
                                      const SkColor colors[], const SkScalar pos[], int count,
                                      SkShader::TileMode mode) {
        return MakeRadial(center, radius, colors, pos, count, mode, 0, NULL);
    }

    static sk_sp<SkShader> MakeTwoPointConical(const SkPoint& start, SkScalar startRadius,
                                               const SkPoint& end, SkScalar endRadius,
                                               const SkColor colors[], const SkScalar pos[],
                                               int count, SkShader::TileMode mode,
                                               uint32_t flags, const SkMatrix* localMatrix);
    static sk_sp<SkShader> MakeTwoPointConical(const SkPoint& start, SkScalar startRadius,
                                               const SkPoint& end, SkScalar endRadius,
                                               const SkColor colors[], const SkScalar pos[],
                                               int count, SkShader::TileMode mode) {
        return MakeTwoPointConical(start, startRadius, end, endRadius, colors, pos, count, mode,
                                   0, NULL);
    }

    static sk_sp<SkShader> MakeSweep(SkScalar cx, SkScalar cy,
                                     const SkColor colors[], const SkScalar pos[], int count,
                                     uint32_t flags, const SkMatrix* localMatrix);
    static sk_sp<SkShader> MakeSweep(SkScalar cx, SkScalar cy,
                                     const SkColor colors[], const SkScalar pos[], int count) {
        return MakeSweep(cx, cy, colors, pos, count, 0, NULL);
    }

#ifdef SK_SUPPORT_LEGACY_CREATESHADER_PTR
    static SkShader* CreateLinear(const SkPoint pts[2],
                                  const SkColor colors[], const SkScalar pos[], int count,
                                  SkShader::TileMode mode,
                                  uint32_t flags, const SkMatrix* localMatrix) {
        return MakeLinear(pts, colors, pos, count, mode, flags, localMatrix).release();
    }
    static SkShader* CreateLinear(const SkPoint pts[2],
                                  const SkColor colors[], const SkScalar pos[], int count,
                                  SkShader::TileMode mode) {
        return CreateLinear(pts, colors, pos, count, mode, 0, NULL);
    }

    static SkShader* CreateRadial(const SkPoint& center, SkScalar radius,
                                  const SkColor colors[], const SkScalar pos[], int count,
                                  SkShader::TileMode mode,
                                  uint32_t flags, const SkMatrix* localMatrix) {
        return MakeRadial(center, radius, colors, pos, count, mode, flags, localMatrix).release();
    }
    
    static SkShader* CreateRadial(const SkPoint& center, SkScalar radius,
                                  const SkColor colors[], const SkScalar pos[], int count,
                                  SkShader::TileMode mode) {
        return CreateRadial(center, radius, colors, pos, count, mode, 0, NULL);
    }

    static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startRadius,
                                           const SkPoint& end, SkScalar endRadius,
                                           const SkColor colors[], const SkScalar pos[], int count,
                                           SkShader::TileMode mode,
                                           uint32_t flags, const SkMatrix* localMatrix) {
        return MakeTwoPointConical(start, startRadius, end, endRadius, colors, pos, count, mode,
                                   flags, localMatrix).release();
    }
    static SkShader* CreateTwoPointConical(const SkPoint& start, SkScalar startRadius,
                                           const SkPoint& end, SkScalar endRadius,
                                           const SkColor colors[], const SkScalar pos[], int count,
                                           SkShader::TileMode mode) {
        return CreateTwoPointConical(start, startRadius, end, endRadius, colors, pos, count, mode,
                                     0, NULL);
    }
    
    static SkShader* CreateSweep(SkScalar cx, SkScalar cy,
                                 const SkColor colors[], const SkScalar pos[], int count,
                                 uint32_t flags, const SkMatrix* localMatrix) {
        return MakeSweep(cx, cy, colors, pos, count, flags, localMatrix).release();
    }
    static SkShader* CreateSweep(SkScalar cx, SkScalar cy,
                                 const SkColor colors[], const SkScalar pos[], int count) {
        return CreateSweep(cx, cy, colors, pos, count, 0, NULL);
    }
#endif
    

    SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
};

#endif