src/gpu/ccpr/GrCCAtlas.h

/*
 * 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 GrCCAtlas_DEFINED
#define GrCCAtlas_DEFINED

#include "SkRefCnt.h"
#include "SkSize.h"

class GrCaps;
class GrCCPathParser;
class GrDrawOp;
class GrOnFlushResourceProvider;
class GrRenderTargetContext;
class GrTextureProxy;
struct SkIPoint16;

/**
 * This class implements a dynamic size GrRectanizer that grows until it reaches the implementation-
 * dependent max texture size. When finalized, it also creates and stores a GrTextureProxy for the
 * underlying atlas.
 */
class GrCCAtlas {
public:
    static constexpr int kMinSize = 1024;

    using CoverageCountBatchID = int;

    GrCCAtlas(const GrCaps&, int minWidth, int minHeight);
    ~GrCCAtlas();

    bool addRect(int devWidth, int devHeight, SkIPoint16* loc);
    const SkISize& drawBounds() { return fDrawBounds; }

    void setCoverageCountBatchID(CoverageCountBatchID batchID) {
        SkASSERT(!fCoverageCountBatchID);
        SkASSERT(!fTextureProxy);
        fCoverageCountBatchID = batchID;
    }

    sk_sp<GrRenderTargetContext> SK_WARN_UNUSED_RESULT finalize(GrOnFlushResourceProvider*,
                                                                sk_sp<const GrCCPathParser>);

    GrTextureProxy* textureProxy() const { return fTextureProxy.get(); }

private:
    class Node;
    class DrawCoverageCountOp;

    bool internalPlaceRect(int w, int h, SkIPoint16* loc);

    const int fMaxAtlasSize;

    int fWidth;
    int fHeight;
    SkISize fDrawBounds;
    std::unique_ptr<Node> fTopNode;

    CoverageCountBatchID fCoverageCountBatchID SkDEBUGCODE(= 0);
    sk_sp<GrTextureProxy> fTextureProxy;
};

#endif