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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 GrRenderTargetProxy_DEFINED
#define GrRenderTargetProxy_DEFINED
#include "GrRenderTarget.h"
#include "GrSurfaceProxy.h"
#include "GrTypes.h"
class GrResourceProvider;
// This class delays the acquisition of RenderTargets until they are actually
// required
// Beware: the uniqueID of the RenderTargetProxy will usually be different than
// the uniqueID of the RenderTarget it represents!
class GrRenderTargetProxy : virtual public GrSurfaceProxy {
public:
GrRenderTargetProxy* asRenderTargetProxy() override { return this; }
const GrRenderTargetProxy* asRenderTargetProxy() const override { return this; }
// Actually instantiate the backing rendertarget, if necessary.
bool instantiate(GrResourceProvider* resourceProvider) override;
GrFSAAType fsaaType() const {
if (!fSampleCnt) {
SkASSERT(!(fRenderTargetFlags & GrRenderTarget::Flags::kMixedSampled));
return GrFSAAType::kNone;
}
return (fRenderTargetFlags & GrRenderTarget::Flags::kMixedSampled)
? GrFSAAType::kMixedSamples
: GrFSAAType::kUnifiedMSAA;
}
/**
* Returns the number of samples/pixel in the stencil buffer (Zero if non-MSAA).
*/
int numStencilSamples() const { return fSampleCnt; }
/**
* Returns the number of samples/pixel in the color buffer (Zero if non-MSAA or mixed sampled).
*/
int numColorSamples() const {
return GrFSAAType::kMixedSamples == this->fsaaType() ? 0 : fSampleCnt;
}
int worstCaseWidth() const;
int worstCaseHeight() const;
int maxWindowRectangles(const GrCaps& caps) const;
GrRenderTarget::Flags testingOnly_getFlags() const;
// TODO: move this to a priv class!
bool refsWrappedObjects() const;
protected:
friend class GrSurfaceProxy; // for ctors
// Deferred version
GrRenderTargetProxy(const GrCaps&, const GrSurfaceDesc&,
SkBackingFit, SkBudgeted, uint32_t flags);
// Wrapped version
GrRenderTargetProxy(sk_sp<GrSurface>);
private:
size_t onUninstantiatedGpuMemorySize() const override;
int fSampleCnt;
// For wrapped render targets the actual GrRenderTarget is stored in the GrIORefProxy class.
// For deferred proxies that pointer is filled in when we need to instantiate the
// deferred resource.
// These don't usually get computed until the render target is instantiated, but the render
// target proxy may need to answer queries about it before then. And since in the deferred case
// we know the newly created render target will be internal, we are able to precompute what the
// flags will ultimately end up being. In the wrapped case we just copy the wrapped
// rendertarget's info here.
GrRenderTarget::Flags fRenderTargetFlags;
typedef GrSurfaceProxy INHERITED;
};
#endif
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