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skia2/gm/convexpolyeffect.cpp
Chris Dalton 6ce447a4ec Eliminate mixed samples as an FBO type or AA type 
From now on, sample counts always refer to the number of actual color
samples, and render targets don't have separate color and stencil
sample counts.

If mixed samples support is available when making a
"GrAAType::kCoverage" draw, then an op may attach and use a mixed
sampled stencil buffer internally. But this will all be invisible to
the client.

After this CL, we temporarily won't have a mode to use nvpr with mixed
samples. That will soon be fixed by a follow-on CL that enables nvpr
with mixed samples in the normal "gl" and "gles" configs.

Bug: skia:
Change-Id: I1cb8277f0d2d0d371f24bb9f39cd473ed5c5c83b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221878
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
2019-06-24 04:08:45 +00:00

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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm/gm.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GrContext.h"
#include "include/private/GrRecordingContext.h"
#include "include/private/GrSharedEnums.h"
#include "include/private/GrTypesPriv.h"
#include "include/private/SkColorData.h"
#include "src/core/SkPointPriv.h"
#include "src/core/SkTLList.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrDefaultGeoProcFactory.h"
#include "src/gpu/GrFragmentProcessor.h"
#include "src/gpu/GrGeometryProcessor.h"
#include "src/gpu/GrMemoryPool.h"
#include "src/gpu/GrOpFlushState.h"
#include "src/gpu/GrPaint.h"
#include "src/gpu/GrProcessorAnalysis.h"
#include "src/gpu/GrProcessorSet.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrRenderTargetContext.h"
#include "src/gpu/GrRenderTargetContextPriv.h"
#include "src/gpu/GrUserStencilSettings.h"
#include "src/gpu/effects/GrConvexPolyEffect.h"
#include "src/gpu/effects/GrPorterDuffXferProcessor.h"
#include "src/gpu/ops/GrDrawOp.h"
#include "src/gpu/ops/GrMeshDrawOp.h"
#include "src/gpu/ops/GrOp.h"
#include <memory>
#include <utility>
class GrAppliedClip;
/** outset rendered rect to visualize anti-aliased poly edges */
static SkRect outset(const SkRect& unsorted) {
SkRect r = unsorted;
r.outset(5.f, 5.f);
return r;
}
/** sorts a rect */
static SkRect sorted_rect(const SkRect& unsorted) {
SkRect r = unsorted;
r.sort();
return r;
}
namespace skiagm {
class PolyBoundsOp : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context,
GrPaint&& paint,
const SkRect& rect) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<PolyBoundsOp>(std::move(paint), rect);
}
const char* name() const override { return "PolyBoundsOp"; }
void visitProxies(const VisitProxyFunc& func) const override {
fProcessors.visitProxies(func);
}
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(
const GrCaps& caps, const GrAppliedClip* clip, bool hasMixedSampledCoverage,
GrClampType clampType) override {
return fProcessors.finalize(
fColor, GrProcessorAnalysisCoverage::kNone, clip, &GrUserStencilSettings::kUnused,
hasMixedSampledCoverage, caps, clampType, &fColor);
}
private:
friend class ::GrOpMemoryPool; // for ctor
PolyBoundsOp(GrPaint&& paint, const SkRect& rect)
: INHERITED(ClassID())
, fColor(paint.getColor4f())
, fProcessors(std::move(paint))
, fRect(outset(rect)) {
this->setBounds(sorted_rect(fRect), HasAABloat::kNo, IsZeroArea::kNo);
}
void onPrepareDraws(Target* target) override {
using namespace GrDefaultGeoProcFactory;
Color color(fColor);
sk_sp<GrGeometryProcessor> gp(GrDefaultGeoProcFactory::Make(
target->caps().shaderCaps(),
color,
Coverage::kSolid_Type,
LocalCoords::kUnused_Type,
SkMatrix::I()));
SkASSERT(gp->vertexStride() == sizeof(SkPoint));
QuadHelper helper(target, sizeof(SkPoint), 1);
SkPoint* verts = reinterpret_cast<SkPoint*>(helper.vertices());
if (!verts) {
return;
}
SkPointPriv::SetRectTriStrip(verts, fRect, sizeof(SkPoint));
helper.recordDraw(target, std::move(gp));
}
void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override {
flushState->executeDrawsAndUploadsForMeshDrawOp(this, chainBounds, std::move(fProcessors));
}
SkPMColor4f fColor;
GrProcessorSet fProcessors;
SkRect fRect;
typedef GrMeshDrawOp INHERITED;
};
/**
* This GM directly exercises a GrProcessor that draws convex polygons.
*/
class ConvexPolyEffect : public GpuGM {
public:
ConvexPolyEffect() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("convex_poly_effect");
}
SkISize onISize() override {
return SkISize::Make(720, 800);
}
void onOnceBeforeDraw() override {
SkPath tri;
tri.moveTo(5.f, 5.f);
tri.lineTo(100.f, 20.f);
tri.lineTo(15.f, 100.f);
fPaths.addToTail(tri);
fPaths.addToTail(SkPath())->reverseAddPath(tri);
tri.close();
fPaths.addToTail(tri);
SkPath ngon;
constexpr SkScalar kRadius = 50.f;
const SkPoint center = { kRadius, kRadius };
for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
SkPoint point = { SkScalarCos(angle), SkScalarSin(angle) };
point.scale(kRadius);
point = center + point;
if (0 == i) {
ngon.moveTo(point);
} else {
ngon.lineTo(point);
}
}
fPaths.addToTail(ngon);
SkMatrix scaleM;
scaleM.setScale(1.1f, 0.4f);
ngon.transform(scaleM);
fPaths.addToTail(ngon);
SkPath linePath;
linePath.moveTo(5.f, 5.f);
linePath.lineTo(6.f, 6.f);
fPaths.addToTail(linePath);
// integer edges
fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
// half-integer edges
fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
// vertically/horizontally thin rects that cover pixel centers
fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 0.75f));
// vertically/horizontally thin rects that don't cover pixel centers
fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
// small in x and y
fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
// inverted in x and y
fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
}
void onDraw(GrContext* context, GrRenderTargetContext* renderTargetContext,
SkCanvas* canvas) override {
SkScalar y = 0;
constexpr SkScalar kDX = 12.f;
for (PathList::Iter iter(fPaths, PathList::Iter::kHead_IterStart);
iter.get();
iter.next()) {
const SkPath* path = iter.get();
SkScalar x = 0;
for (int et = 0; et < kGrClipEdgeTypeCnt; ++et) {
const SkMatrix m = SkMatrix::MakeTrans(x, y);
SkPath p;
path->transform(m, &p);
GrClipEdgeType edgeType = (GrClipEdgeType) et;
std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, p));
if (!fp) {
continue;
}
GrPaint grPaint;
grPaint.setColor4f({ 0, 0, 0, 1.f });
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
grPaint.addCoverageFragmentProcessor(std::move(fp));
std::unique_ptr<GrDrawOp> op =
PolyBoundsOp::Make(context, std::move(grPaint), p.getBounds());
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
x += SkScalarCeilToScalar(path->getBounds().width() + kDX);
}
// Draw AA and non AA paths using normal API for reference.
canvas->save();
canvas->translate(x, y);
SkPaint paint;
canvas->drawPath(*path, paint);
canvas->translate(path->getBounds().width() + 10.f, 0);
paint.setAntiAlias(true);
canvas->drawPath(*path, paint);
canvas->restore();
y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
}
for (RectList::Iter iter(fRects, RectList::Iter::kHead_IterStart);
iter.get();
iter.next()) {
SkScalar x = 0;
for (int et = 0; et < kGrClipEdgeTypeCnt; ++et) {
SkRect rect = *iter.get();
rect.offset(x, y);
GrClipEdgeType edgeType = (GrClipEdgeType) et;
std::unique_ptr<GrFragmentProcessor> fp(GrConvexPolyEffect::Make(edgeType, rect));
if (!fp) {
continue;
}
GrPaint grPaint;
grPaint.setColor4f({ 0, 0, 0, 1.f });
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
grPaint.addCoverageFragmentProcessor(std::move(fp));
std::unique_ptr<GrDrawOp> op = PolyBoundsOp::Make(context, std::move(grPaint),
rect);
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
x += SkScalarCeilToScalar(rect.width() + kDX);
}
// Draw rect without and with AA using normal API for reference
canvas->save();
canvas->translate(x, y);
SkPaint paint;
canvas->drawRect(*iter.get(), paint);
x += SkScalarCeilToScalar(iter.get()->width() + kDX);
paint.setAntiAlias(true);
canvas->drawRect(*iter.get(), paint);
canvas->restore();
y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
}
}
private:
typedef SkTLList<SkPath, 1> PathList;
typedef SkTLList<SkRect, 1> RectList;
PathList fPaths;
RectList fRects;
typedef GM INHERITED;
};
DEF_GM(return new ConvexPolyEffect;)
}
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