/*

 * Copyright 2019 Google Inc.

 *

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

 * found in the LICENSE file.

 */

#ifndef SkStrikeInterface_DEFINED

#define SkStrikeInterface_DEFINED

#include "include/core/SkPaint.h"

#include "include/core/SkPoint.h"

#include "include/core/SkSpan.h"

#include "include/core/SkTypes.h"

#include "src/core/SkGlyph.h"

#include <memory>

class SkDescriptor;

class SkDrawableGlyphBuffer;

class SkGlyph;

class SkMaskFilter;

class SkPathEffect;

class SkSourceGlyphBuffer;

class SkTypeface;

struct SkGlyphPositionRoundingSpec;

struct SkScalerContextEffects;

class SkStrikeForGPU {

public:

    virtual ~SkStrikeForGPU() = default;

    virtual const SkDescriptor& getDescriptor() const = 0;

    virtual void prepareForMaskDrawing(

            SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) = 0;

    virtual void prepareForSDFTDrawing(

            SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) = 0;

    virtual void prepareForPathDrawing(

            SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) = 0;

    virtual const SkGlyphPositionRoundingSpec& roundingSpec() const = 0;

    // Used with SkScopedStrikeForGPU to take action at the end of a scope.

    virtual void onAboutToExitScope() = 0;

    // Common categories for glyph types used by GPU.

    static bool CanDrawAsMask(const SkGlyph& glyph);

    static bool CanDrawAsSDFT(const SkGlyph& glyph);

    static bool CanDrawAsPath(const SkGlyph& glyph);

    static bool FitsInAtlas(const SkGlyph& glyph);

    struct Deleter {

        void operator()(SkStrikeForGPU* ptr) const {

            ptr->onAboutToExitScope();

        }

    };

};

using SkScopedStrikeForGPU = std::unique_ptr<SkStrikeForGPU, SkStrikeForGPU::Deleter>;

class SkStrikeForGPUCacheInterface {

public:

    virtual ~SkStrikeForGPUCacheInterface() = default;

    virtual SkScopedStrikeForGPU findOrCreateScopedStrike(const SkDescriptor& desc,

                                                          const SkScalerContextEffects& effects,

                                                          const SkTypeface& typeface) = 0;

};

#endif  //SkStrikeInterface_DEFINED