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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 GrClearOp_DEFINED
#define GrClearOp_DEFINED
#include "GrFixedClip.h"
#include "GrGpu.h"
#include "GrGpuCommandBuffer.h"
#include "GrOp.h"
#include "GrOpFlushState.h"
#include "GrRenderTarget.h"
class GrClearOp final : public GrOp {
public:
DEFINE_OP_CLASS_ID
static sk_sp<GrClearOp> Make(const GrFixedClip& clip, GrColor color, GrRenderTarget* rt) {
sk_sp<GrClearOp> op(new GrClearOp(clip, color, rt));
if (!op->fRenderTarget) {
return nullptr; // The clip did not contain any pixels within the render target.
}
return op;
}
static sk_sp<GrClearOp> Make(const SkIRect& rect, GrColor color, GrRenderTarget* rt,
bool fullScreen) {
return sk_sp<GrClearOp>(new GrClearOp(rect, color, rt, fullScreen));
}
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();
}
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:
GrClearOp(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);
}
GrClearOp(const SkIRect& rect, GrColor color, GrRenderTarget* rt, bool fullScreen)
: INHERITED(ClassID())
, fClip(GrFixedClip(rect))
, fColor(color)
, fRenderTarget(rt) {
if (fullScreen) {
fClip.disableScissor();
}
this->setBounds(SkRect::Make(rect), HasAABloat::kNo, IsZeroArea::kNo);
}
bool onCombineIfPossible(GrOp* 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.
GrClearOp* cb = t->cast<GrClearOp>();
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 GrClearOp* 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(GrOpFlushState*) override {}
void onDraw(GrOpFlushState* state, const SkRect& /*bounds*/) override {
state->commandBuffer()->clear(fRenderTarget.get(), fClip, fColor);
}
GrFixedClip fClip;
GrColor fColor;
GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> fRenderTarget;
typedef GrOp INHERITED;
};
#endif
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