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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 GrSurfaceProxy_DEFINED
#define GrSurfaceProxy_DEFINED
#include "GrGpuResource.h"
#include "GrSurface.h"
#include "SkRect.h"
class GrOpList;
class GrTextureProvider;
class GrTextureProxy;
class GrRenderTargetProxy;
// This class replicates the functionality GrIORef<GrSurface> but tracks the
// utilitization for later resource allocation (for the deferred case) and
// forwards on the utilization in the wrapped case
class GrIORefProxy : public SkNoncopyable {
public:
void ref() const {
this->validate();
++fRefCnt;
if (fTarget) {
fTarget->ref();
}
}
void unref() const {
this->validate();
if (fTarget) {
fTarget->unref();
}
if (!(--fRefCnt)) {
delete this;
return;
}
this->validate();
}
void validate() const {
#ifdef SK_DEBUG
SkASSERT(fRefCnt >= 0);
#endif
}
protected:
GrIORefProxy() : fRefCnt(1), fTarget(nullptr) {}
GrIORefProxy(sk_sp<GrSurface> surface) : fRefCnt(1) {
// Since we're manually forwarding on refs & unrefs we don't want sk_sp doing
// anything extra.
fTarget = surface.release();
}
virtual ~GrIORefProxy() {
// We don't unref 'fTarget' here since the 'unref' method will already
// have forwarded on the unref call that got use here.
}
// TODO: add the IO ref counts. Although if we can delay shader creation to flush time
// we may not even need to do that.
mutable int32_t fRefCnt;
// For deferred proxies this will be null. For wrapped proxies it will point to the
// wrapped resource.
GrSurface* fTarget;
};
class GrSurfaceProxy : public GrIORefProxy {
public:
const GrSurfaceDesc& desc() const { return fDesc; }
GrSurfaceOrigin origin() const {
SkASSERT(kTopLeft_GrSurfaceOrigin == fDesc.fOrigin ||
kBottomLeft_GrSurfaceOrigin == fDesc.fOrigin);
return fDesc.fOrigin;
}
int width() const { return fDesc.fWidth; }
int height() const { return fDesc.fHeight; }
GrPixelConfig config() const { return fDesc.fConfig; }
uint32_t uniqueID() const { return fUniqueID; }
/**
* Helper that gets the width and height of the surface as a bounding rectangle.
*/
SkRect getBoundsRect() const { return SkRect::MakeIWH(this->width(), this->height()); }
/**
* @return the texture proxy associated with the surface proxy, may be NULL.
*/
virtual GrTextureProxy* asTextureProxy() { return nullptr; }
virtual const GrTextureProxy* asTextureProxy() const { return nullptr; }
/**
* @return the render target proxy associated with the surface proxy, may be NULL.
*/
virtual GrRenderTargetProxy* asRenderTargetProxy() { return nullptr; }
virtual const GrRenderTargetProxy* asRenderTargetProxy() const { return nullptr; }
/**
* Does the resource count against the resource budget?
*/
SkBudgeted isBudgeted() const { return fBudgeted; }
void setLastOpList(GrOpList* opList);
GrOpList* getLastOpList() { return fLastOpList; }
/**
* Retrieves the amount of GPU memory that will be or currently is used by this resource
* in bytes. It is approximate since we aren't aware of additional padding or copies made
* by the driver.
*
* @return the amount of GPU memory used in bytes
*/
size_t gpuMemorySize() const {
if (kInvalidGpuMemorySize == fGpuMemorySize) {
fGpuMemorySize = this->onGpuMemorySize();
SkASSERT(kInvalidGpuMemorySize != fGpuMemorySize);
}
return fGpuMemorySize;
}
bool isWrapped_ForTesting() const;
protected:
// Deferred version
GrSurfaceProxy(const GrSurfaceDesc& desc, SkBackingFit fit, SkBudgeted budgeted)
: fDesc(desc)
, fFit(fit)
, fBudgeted(budgeted)
, fUniqueID(GrGpuResource::CreateUniqueID())
, fGpuMemorySize(kInvalidGpuMemorySize)
, fLastOpList(nullptr) {
}
// Wrapped version
GrSurfaceProxy(sk_sp<GrSurface> surface, SkBackingFit fit);
virtual ~GrSurfaceProxy();
GrSurface* instantiate(GrTextureProvider* texProvider);
// For wrapped resources, 'fDesc' will always be filled in from the wrapped resource.
const GrSurfaceDesc fDesc;
const SkBackingFit fFit; // always exact for wrapped resources
const SkBudgeted fBudgeted; // set from the backing resource for wrapped resources
const uint32_t fUniqueID; // set from the backing resource for wrapped resources
static const size_t kInvalidGpuMemorySize = ~static_cast<size_t>(0);
SkDEBUGCODE(size_t getRawGpuMemorySize_debugOnly() const { return fGpuMemorySize; })
private:
virtual size_t onGpuMemorySize() const = 0;
// This entry is lazily evaluated so, when the proxy wraps a resource, the resource
// will be called but, when the proxy is deferred, it will compute the answer itself.
// If the proxy computes its own answer that answer is checked (in debug mode) in
// the instantiation method.
mutable size_t fGpuMemorySize;
// The last opList that wrote to or is currently going to write to this surface
// The opList can be closed (e.g., no render target context is currently bound
// to this renderTarget).
// This back-pointer is required so that we can add a dependancy between
// the opList used to create the current contents of this surface
// and the opList of a destination surface to which this one is being drawn or copied.
GrOpList* fLastOpList;
typedef GrIORefProxy INHERITED;
};
#endif
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