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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 GrClearBatch_DEFINED
#define GrClearBatch_DEFINED
#include "GrBatch.h"
#include "GrBatchFlushState.h"
#include "GrFixedClip.h"
#include "GrGpu.h"
#include "GrGpuCommandBuffer.h"
#include "GrRenderTarget.h"
class GrClearBatch final : public GrBatch {
public:
DEFINE_BATCH_CLASS_ID
static sk_sp<GrClearBatch> Make(const GrFixedClip& clip, GrColor color, GrRenderTarget* rt) {
sk_sp<GrClearBatch> batch(new GrClearBatch(clip, color, rt));
if (!batch->renderTarget()) {
return nullptr; // The clip did not contain any pixels within the render target.
}
return batch;
}
const char* name() const override { return "Clear"; }
// TODO: this needs to be updated to return GrSurfaceProxy::UniqueID
GrGpuResource::UniqueID renderTargetUniqueID() const override {
return fRenderTarget.get()->uniqueID();
}
// TODO: store a GrRenderTargetContext instead
GrRenderTarget* renderTarget() const override { return fRenderTarget.get(); }
SkString dumpInfo() const override {
SkString string("Scissor [");
if (fClip.scissorEnabled()) {
const SkIRect& r = fClip.scissorRect();
string.appendf("L: %d, T: %d, R: %d, B: %d", r.fLeft, r.fTop, r.fRight, r.fBottom);
}
string.appendf("], Color: 0x%08x, RT: %d", fColor,
fRenderTarget.get()->uniqueID().asUInt());
string.append(INHERITED::dumpInfo());
return string;
}
void setColor(GrColor color) { fColor = color; }
private:
GrClearBatch(const GrFixedClip& clip, GrColor color, GrRenderTarget* rt)
: INHERITED(ClassID())
, fClip(clip)
, fColor(color) {
SkIRect rtRect = SkIRect::MakeWH(rt->width(), rt->height());
if (fClip.scissorEnabled()) {
// Don't let scissors extend outside the RT. This may improve batching.
if (!fClip.intersect(rtRect)) {
return;
}
if (fClip.scissorRect() == rtRect) {
fClip.disableScissor();
}
}
this->setBounds(SkRect::Make(fClip.scissorEnabled() ? fClip.scissorRect() : rtRect),
HasAABloat::kNo, IsZeroArea::kNo);
fRenderTarget.reset(rt);
}
bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override {
// This could be much more complicated. Currently we look at cases where the new clear
// contains the old clear, or when the new clear is a subset of the old clear and is the
// same color.
GrClearBatch* cb = t->cast<GrClearBatch>();
SkASSERT(cb->fRenderTarget == fRenderTarget);
if (!fClip.windowRectsState().cheapEqualTo(cb->fClip.windowRectsState())) {
return false;
}
if (cb->contains(this)) {
fClip = cb->fClip;
this->replaceBounds(*t);
fColor = cb->fColor;
return true;
} else if (cb->fColor == fColor && this->contains(cb)) {
return true;
}
return false;
}
bool contains(const GrClearBatch* that) const {
// The constructor ensures that scissor gets disabled on any clip that fills the entire RT.
return !fClip.scissorEnabled() ||
(that->fClip.scissorEnabled() &&
fClip.scissorRect().contains(that->fClip.scissorRect()));
}
void onPrepare(GrBatchFlushState*) override {}
void onDraw(GrBatchFlushState* state, const SkRect& /*bounds*/) override {
state->commandBuffer()->clear(fClip, fColor);
}
GrFixedClip fClip;
GrColor fColor;
GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> fRenderTarget;
typedef GrBatch INHERITED;
};
#endif
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