/*

 * Copyright 2017 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkAutoBlitterChoose_DEFINED

#define SkAutoBlitterChoose_DEFINED

#include "include/private/SkMacros.h"

#include "src/core/SkArenaAlloc.h"

#include "src/core/SkBlitter.h"

#include "src/core/SkDraw.h"

#include "src/core/SkRasterClip.h"

class SkMatrix;

class SkPaint;

class SkPixmap;

class SkAutoBlitterChoose : SkNoncopyable {

public:

    SkAutoBlitterChoose() {}

    SkAutoBlitterChoose(const SkDraw& draw, const SkMatrixProvider* matrixProvider,

                        const SkPaint& paint, bool drawCoverage = false) {

        this->choose(draw, matrixProvider, paint, drawCoverage);

    }

    SkBlitter*  operator->() { return fBlitter; }

    SkBlitter*  get() const { return fBlitter; }

    SkBlitter* choose(const SkDraw& draw, const SkMatrixProvider* matrixProvider,

                      const SkPaint& paint, bool drawCoverage = false) {

        SkASSERT(!fBlitter);

        if (!matrixProvider) {

            matrixProvider = draw.fMatrixProvider;

        }

        fBlitter = SkBlitter::Choose(draw.fDst, *matrixProvider, paint, &fAlloc, drawCoverage,

                                     draw.fRC->clipShader());

        if (draw.fCoverage) {

            // hmm, why can't choose ignore the paint if drawCoverage is true?

            SkBlitter* coverageBlitter =

                    SkBlitter::Choose(*draw.fCoverage, *matrixProvider, SkPaint(), &fAlloc, true,

                                      draw.fRC->clipShader());

            fBlitter = fAlloc.make<SkPairBlitter>(fBlitter, coverageBlitter);

        }

        return fBlitter;

    }

private:

    // Owned by fAlloc, which will handle the delete.

    SkBlitter* fBlitter = nullptr;

    SkSTArenaAlloc<kSkBlitterContextSize> fAlloc;

};

#endif