f9635999a4
Adds a flag to GrRenderTarget that indicates whether it can be used with window rectangles. Also attempts to clean up some of the mixed samples API. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2225303002 Review-Url: https://codereview.chromium.org/2225303002
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrRenderTargetProxy_DEFINED
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#define GrRenderTargetProxy_DEFINED
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#include "GrRenderTarget.h"
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#include "GrRenderTargetPriv.h"
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#include "GrSurfaceProxy.h"
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#include "GrTypes.h"
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class GrTextureProvider;
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// This class delays the acquisition of RenderTargets until they are actually
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// required
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// Beware: the uniqueID of the RenderTargetProxy will usually be different than
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// the uniqueID of the RenderTarget it represents!
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class GrRenderTargetProxy : public GrSurfaceProxy {
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public:
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/**
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* The caller gets the creation ref.
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*/
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static sk_sp<GrRenderTargetProxy> Make(const GrCaps&, const GrSurfaceDesc&,
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SkBackingFit, SkBudgeted);
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static sk_sp<GrRenderTargetProxy> Make(const GrCaps&, sk_sp<GrRenderTarget>);
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~GrRenderTargetProxy() override;
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// TODO: add asTextureProxy variants
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GrRenderTargetProxy* asRenderTargetProxy() override { return this; }
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const GrRenderTargetProxy* asRenderTargetProxy() const override { return this; }
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// Actually instantiate the backing rendertarget, if necessary.
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GrRenderTarget* instantiate(GrTextureProvider* texProvider);
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bool isStencilBufferMultisampled() const { return fDesc.fSampleCnt > 0; }
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/**
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* For our purposes, "Mixed Sampled" means the stencil buffer is multisampled but the color
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* buffer is not.
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*/
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bool isMixedSampled() const { return fFlags & GrRenderTargetPriv::Flags::kMixedSampled; }
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/**
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* "Unified Sampled" means the stencil and color buffers are both multisampled.
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*/
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bool isUnifiedMultisampled() const { return fDesc.fSampleCnt > 0 && !this->isMixedSampled(); }
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/**
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* Returns the number of samples/pixel in the stencil buffer (Zero if non-MSAA).
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*/
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int numStencilSamples() const { return fDesc.fSampleCnt; }
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/**
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* Returns the number of samples/pixel in the color buffer (Zero if non-MSAA or mixed sampled).
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*/
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int numColorSamples() const { return this->isMixedSampled() ? 0 : fDesc.fSampleCnt; }
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void setLastDrawTarget(GrDrawTarget* dt);
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GrDrawTarget* getLastDrawTarget() { return fLastDrawTarget; }
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GrRenderTargetPriv::Flags testingOnly_getFlags() const;
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private:
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// Deferred version
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GrRenderTargetProxy(const GrCaps&, const GrSurfaceDesc&, SkBackingFit, SkBudgeted);
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// Wrapped version
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GrRenderTargetProxy(const GrCaps&, sk_sp<GrRenderTarget> rt);
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// For wrapped render targets we store it here.
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// For deferred proxies we will fill this in when we need to instantiate the deferred resource
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sk_sp<GrRenderTarget> fTarget;
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// These don't usually get computed until the render target is instantiated, but the render
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// target proxy may need to answer queries about it before then. And since in the deferred case
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// we know the newly created render target will be internal, we are able to precompute what the
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// flags will ultimately end up being. In the wrapped case we just copy the wrapped
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// rendertarget's info here.
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GrRenderTargetPriv::Flags fFlags;
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// The last drawTarget that wrote to or is currently going to write to this renderTarget
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// The drawTarget can be closed (e.g., no draw context is currently bound
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// to this renderTarget).
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// This back-pointer is required so that we can add a dependancy between
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// the drawTarget used to create the current contents of this renderTarget
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// and the drawTarget of a destination renderTarget to which this one is being drawn.
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GrDrawTarget* fLastDrawTarget;
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typedef GrSurfaceProxy INHERITED;
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};
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#endif
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