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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrDiscardOp_DEFINED
#define GrDiscardOp_DEFINED
#include "GrGpu.h"
#include "GrOp.h"
#include "GrOpFlushState.h"
#include "GrRenderTarget.h"
#include "GrRenderTargetContext.h"
class GrDiscardOp final : public GrOp {
public:
DEFINE_OP_CLASS_ID
// MDB TODO: replace the renderTargetContext with just the renderTargetProxy.
// For now, we need the renderTargetContext for its accessRenderTarget powers.
static std::unique_ptr<GrOp> Make(GrRenderTargetContext* rtc) {
// MDB TODO: remove this. In this hybrid state we need to be sure the RT is instantiable
// so it can carry the IO refs. In the future we will just get the proxy and
// it carry the IO refs.
if (!rtc->accessRenderTarget()) {
return nullptr;
}
return std::unique_ptr<GrOp>(new GrDiscardOp(rtc));
}
const char* name() const override { return "Discard"; }
SkString dumpInfo() const override {
SkString string;
string.append(INHERITED::dumpInfo());
string.printf("rtID: %d proxyID: %d\n", fRenderTarget.get()->uniqueID().asUInt(),
fProxyUniqueID.asUInt());
return string;
}
private:
GrDiscardOp(GrRenderTargetContext* rtc)
: INHERITED(ClassID())
, fProxyUniqueID(rtc->asSurfaceProxy()->uniqueID()) {
this->setBounds(SkRect::MakeIWH(rtc->width(), rtc->height()), HasAABloat::kNo,
IsZeroArea::kNo);
fRenderTarget.reset(rtc->accessRenderTarget());
}
bool onCombineIfPossible(GrOp* that, const GrCaps& caps) override {
return fRenderTarget.get() == that->cast<GrDiscardOp>()->fRenderTarget.get();
}
void onPrepare(GrOpFlushState*) override {}
void onExecute(GrOpFlushState* state) override {
// MDB TODO: instantiate the renderTarget from the proxy in here
state->commandBuffer()->discard(fRenderTarget.get());
}
// MDB TODO: remove this. When the renderTargetProxy carries the refs this will be redundant.
GrSurfaceProxy::UniqueID fProxyUniqueID;
GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> fRenderTarget;
typedef GrOp INHERITED;
};
#endif
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