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/*
* 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 GrSurfaceContext_DEFINED
#define GrSurfaceContext_DEFINED
#include "../private/GrSurfaceProxy.h"
#include "GrColorSpaceInfo.h"
#include "SkRefCnt.h"
class GrAuditTrail;
class GrContext;
class GrDrawingManager;
class GrOpList;
class GrRenderTargetContext;
class GrRenderTargetProxy;
class GrSingleOwner;
class GrSurface;
class GrSurfaceContextPriv;
class GrSurfaceProxy;
class GrTextureProxy;
struct SkIPoint;
struct SkIRect;
/**
* A helper object to orchestrate commands for a particular surface
*/
class SK_API GrSurfaceContext : public SkRefCnt {
public:
~GrSurfaceContext() override {}
const GrColorSpaceInfo& colorSpaceInfo() const { return fColorSpaceInfo; }
// TODO: these two calls would be way cooler if this object had a GrSurfaceProxy pointer
int width() const { return this->asSurfaceProxy()->width(); }
int height() const { return this->asSurfaceProxy()->height(); }
/*
* Copy 'src' into the proxy backing this context
* @param src src of pixels
* @param srcRect the subset of 'src' to copy
* @param dstPoint the origin of the 'srcRect' in the destination coordinate space
* @return true if the copy succeeded; false otherwise
*
* Note: Notionally, 'srcRect' is clipped to 'src's extent with 'dstPoint' being adjusted.
* Then the 'srcRect' offset by 'dstPoint' is clipped against the dst's extent.
* The end result is only valid src pixels and dst pixels will be touched but the copied
* regions will not be shifted.
*/
bool copy(GrSurfaceProxy* src, const SkIRect& srcRect, const SkIPoint& dstPoint);
bool copy(GrSurfaceProxy* src) {
return this->copy(src,
SkIRect::MakeWH(src->width(), src->height()),
SkIPoint::Make(0, 0));
}
/**
* Reads a rectangle of pixels from the render target context.
* @param dstInfo image info for the destination
* @param dstBuffer destination pixels for the read
* @param dstRowBytes bytes in a row of 'dstBuffer'
* @param x x offset w/in the render target context from which to read
* @param y y offset w/in the render target context from which to read
*
* @return true if the read succeeded, false if not. The read can fail because of an
* unsupported pixel config.
*/
bool readPixels(const SkImageInfo& dstInfo, void* dstBuffer, size_t dstRowBytes,
int x, int y, uint32_t flags = 0);
/**
* Writes a rectangle of pixels [srcInfo, srcBuffer, srcRowbytes] into the
* renderTargetContext at the specified position.
* @param srcInfo image info for the source pixels
* @param srcBuffer source for the write
* @param srcRowBytes bytes in a row of 'srcBuffer'
* @param x x offset w/in the render target context at which to write
* @param y y offset w/in the render target context at which to write
*
* @return true if the write succeeded, false if not. The write can fail because of an
* unsupported pixel config.
*/
bool writePixels(const SkImageInfo& srcInfo, const void* srcBuffer, size_t srcRowBytes,
int x, int y, uint32_t flags = 0);
// TODO: this is virtual b.c. this object doesn't have a pointer to the wrapped GrSurfaceProxy?
virtual GrSurfaceProxy* asSurfaceProxy() = 0;
virtual const GrSurfaceProxy* asSurfaceProxy() const = 0;
virtual sk_sp<GrSurfaceProxy> asSurfaceProxyRef() = 0;
virtual GrTextureProxy* asTextureProxy() = 0;
virtual const GrTextureProxy* asTextureProxy() const = 0;
virtual sk_sp<GrTextureProxy> asTextureProxyRef() = 0;
virtual GrRenderTargetProxy* asRenderTargetProxy() = 0;
virtual sk_sp<GrRenderTargetProxy> asRenderTargetProxyRef() = 0;
virtual GrRenderTargetContext* asRenderTargetContext() { return nullptr; }
GrAuditTrail* auditTrail() { return fAuditTrail; }
// Provides access to functions that aren't part of the public API.
GrSurfaceContextPriv surfPriv();
const GrSurfaceContextPriv surfPriv() const;
protected:
friend class GrSurfaceContextPriv;
GrSurfaceContext(GrContext*, GrDrawingManager*, GrPixelConfig, sk_sp<SkColorSpace>,
GrAuditTrail*, GrSingleOwner*);
GrDrawingManager* drawingManager() { return fDrawingManager; }
const GrDrawingManager* drawingManager() const { return fDrawingManager; }
virtual GrOpList* getOpList() = 0;
SkDEBUGCODE(virtual void validate() const = 0;)
SkDEBUGCODE(GrSingleOwner* singleOwner() { return fSingleOwner; })
GrContext* fContext;
GrAuditTrail* fAuditTrail;
private:
GrColorSpaceInfo fColorSpaceInfo;
GrDrawingManager* fDrawingManager;
// In debug builds we guard against improper thread handling
SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;)
typedef SkRefCnt INHERITED;
};
#endif
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