src/gpu/GrTextureOpList.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 GrTexureOpList_DEFINED
#define GrTexureOpList_DEFINED

#include "GrGpuResource.h"
#include "GrOpList.h"
#include "GrSurfaceProxy.h"

#include "SkTArray.h"

class GrAuditTrail;
class GrGpu;
class GrOp;
class GrTextureProxy;
struct SkIPoint;
struct SkIRect;

class GrTextureOpList final : public GrOpList {
public:
    GrTextureOpList(GrResourceProvider*, sk_sp<GrOpMemoryPool>,
                    sk_sp<GrTextureProxy>, GrAuditTrail*);
    ~GrTextureOpList() override;

    /**
     * Empties the draw buffer of any queued ops.
     */
    void endFlush() override;

    /**
     * Together these two functions flush all queued ops to GrGpuCommandBuffer. The return value
     * of executeOps() indicates whether any commands were actually issued to the GPU.
     */
    void onPrepare(GrOpFlushState* flushState) override;
    bool onExecute(GrOpFlushState* flushState) override;

    /**
     * Copies a pixel rectangle from one surface to another. This call may finalize
     * reserved vertex/index data (as though a draw call was made). The src pixels
     * copied are specified by srcRect. They are copied to a rect of the same
     * size in dst with top left at dstPoint. If the src rect is clipped by the
     * src bounds then  pixel values in the dst rect corresponding to area clipped
     * by the src rect are not overwritten. This method is not guaranteed to succeed
     * depending on the type of surface, configs, etc, and the backend-specific
     * limitations.
     */
    bool copySurface(GrRecordingContext*,
                     GrSurfaceProxy* dst,
                     GrSurfaceProxy* src,
                     const SkIRect& srcRect,
                     const SkIPoint& dstPoint) override;

    GrTextureOpList* asTextureOpList() override { return this; }

    SkDEBUGCODE(void dump(bool printDependencies) const override;)

private:
    bool onIsUsed(GrSurfaceProxy*) const override;

    void deleteOp(int index);
    void deleteOps();

    void purgeOpsWithUninstantiatedProxies() override;

    void gatherProxyIntervals(GrResourceAllocator*) const override;

    void recordOp(std::unique_ptr<GrOp>);

    // The memory for the ops in 'fOpChains' is actually stored in 'fOpMemoryPool'
    SkSTArray<2, std::unique_ptr<GrOp>, true> fRecordedOps;

    typedef GrOpList INHERITED;
};

#endif