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skia2/gm/beziereffects.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 2013 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/SkPoint.h"
#include "include/core/SkPoint3.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 "include/utils/SkRandom.h"
#include "src/core/SkGeometry.h"
#include "src/core/SkPointPriv.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrContextPriv.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/GrBezierEffect.h"
#include "src/gpu/effects/GrPorterDuffXferProcessor.h"
#include "src/gpu/geometry/GrPathUtils.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;
namespace skiagm {
class BezierTestOp : public GrMeshDrawOp {
public:
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(
const GrCaps& caps, const GrAppliedClip* clip, bool hasMixedSampledCoverage,
GrClampType clampType) override {
return fProcessorSet.finalize(
fColor, GrProcessorAnalysisCoverage::kSingleChannel, clip,
&GrUserStencilSettings::kUnused, hasMixedSampledCoverage, caps, clampType, &fColor);
}
void visitProxies(const VisitProxyFunc& func) const override {
fProcessorSet.visitProxies(func);
}
protected:
BezierTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect, const SkPMColor4f& color,
int32_t classID)
: INHERITED(classID)
, fRect(rect)
, fColor(color)
, fGeometryProcessor(std::move(gp))
, fProcessorSet(SkBlendMode::kSrc) {
this->setBounds(rect, HasAABloat::kYes, IsZeroArea::kNo);
}
void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override {
flushState->executeDrawsAndUploadsForMeshDrawOp(
this, chainBounds, std::move(fProcessorSet));
}
sk_sp<const GrGeometryProcessor> gp() const { return fGeometryProcessor; }
const SkRect& rect() const { return fRect; }
const SkPMColor4f& color() const { return fColor; }
private:
SkRect fRect;
SkPMColor4f fColor;
sk_sp<const GrGeometryProcessor> fGeometryProcessor;
GrProcessorSet fProcessorSet;
typedef GrMeshDrawOp INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierConicTestOp : public BezierTestOp {
public:
DEFINE_OP_CLASS_ID
const char* name() const override { return "BezierConicTestOp"; }
static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context,
sk_sp<const GrGeometryProcessor> gp,
const SkRect& rect,
const SkPMColor4f& color,
const SkMatrix& klm) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<BezierConicTestOp>(std::move(gp), rect, color, klm);
}
private:
friend class ::GrOpMemoryPool; // for ctor
BezierConicTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect,
const SkPMColor4f& color, const SkMatrix& klm)
: INHERITED(std::move(gp), rect, color, ClassID()), fKLM(klm) {}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) override {
SkASSERT(this->gp()->vertexStride() == sizeof(Vertex));
QuadHelper helper(target, sizeof(Vertex), 1);
Vertex* verts = reinterpret_cast<Vertex*>(helper.vertices());
if (!verts) {
return;
}
SkRect rect = this->rect();
SkPointPriv::SetRectTriStrip(&verts[0].fPosition, rect.fLeft, rect.fTop, rect.fRight,
rect.fBottom, sizeof(Vertex));
for (int v = 0; v < 4; ++v) {
SkPoint3 pt3 = {verts[v].fPosition.x(), verts[v].fPosition.y(), 1.f};
fKLM.mapHomogeneousPoints((SkPoint3* ) verts[v].fKLM, &pt3, 1);
}
helper.recordDraw(target, this->gp());
}
SkMatrix fKLM;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef BezierTestOp INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierConicEffects : public GpuGM {
public:
BezierConicEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_conic_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(GrContext* context, GrRenderTargetContext* renderTargetContext,
SkCanvas* canvas) override {
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
constexpr int kNumConics = 10;
SkRandom rand;
// Mult by 3 for each edge effect type
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumConics*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumConics*3) / numCols);
SkScalar w = SkIntToScalar(renderTargetContext->width()) / numCols;
SkScalar h = SkIntToScalar(renderTargetContext->height()) / numRows;
int row = 0;
int col = 0;
SkPMColor4f color = SkPMColor4f::FromBytes_RGBA(0xff000000);
for (int i = 0; i < kNumConics; ++i) {
SkPoint baseControlPts[] = {
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
SkScalar weight = rand.nextRangeF(0.f, 2.f);
for(int edgeType = 0; edgeType < kGrClipEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrClipEdgeType et = (GrClipEdgeType)edgeType;
gp = GrConicEffect::Make(color, SkMatrix::I(), et, *context->priv().caps(),
SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = col * w;
SkScalar y = row * h;
SkPoint controlPts[] = {
{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
};
SkConic dst[4];
SkMatrix klm;
int cnt = chop_conic(controlPts, dst, weight);
GrPathUtils::getConicKLM(controlPts, weight, &klm);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(controlPts[i], 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = dst[c].fPts;
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(pts[i], 3.f, choppedPtPaint);
}
SkRect bounds;
//SkPoint bPts[] = {{0.f, 0.f}, {800.f, 800.f}};
//bounds.set(bPts, 2);
bounds.set(pts, 3);
SkPaint boundsPaint;
boundsPaint.setColor(0xff808080);
boundsPaint.setStrokeWidth(0);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundsPaint);
std::unique_ptr<GrDrawOp> op = BezierConicTestOp::Make(context, gp, bounds,
color, klm);
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
// Uses the max curvature function for quads to estimate
// where to chop the conic. If the max curvature is not
// found along the curve segment it will return 1 and
// dst[0] is the original conic. If it returns 2 the dst[0]
// and dst[1] are the two new conics.
int split_conic(const SkPoint src[3], SkConic dst[2], const SkScalar weight) {
SkScalar t = SkFindQuadMaxCurvature(src);
if (t == 0 || t == 1) {
if (dst) {
dst[0].set(src, weight);
}
return 1;
} else {
if (dst) {
SkConic conic;
conic.set(src, weight);
if (!conic.chopAt(t, dst)) {
dst[0].set(src, weight);
return 1;
}
}
return 2;
}
}
// Calls split_conic on the entire conic and then once more on each subsection.
// Most cases will result in either 1 conic (chop point is not within t range)
// or 3 points (split once and then one subsection is split again).
int chop_conic(const SkPoint src[3], SkConic dst[4], const SkScalar weight) {
SkConic dstTemp[2];
int conicCnt = split_conic(src, dstTemp, weight);
if (2 == conicCnt) {
int conicCnt2 = split_conic(dstTemp[0].fPts, dst, dstTemp[0].fW);
conicCnt = conicCnt2 + split_conic(dstTemp[1].fPts, &dst[conicCnt2], dstTemp[1].fW);
} else {
dst[0] = dstTemp[0];
}
return conicCnt;
}
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
class BezierQuadTestOp : public BezierTestOp {
public:
DEFINE_OP_CLASS_ID
const char* name() const override { return "BezierQuadTestOp"; }
static std::unique_ptr<GrDrawOp> Make(GrContext* context,
sk_sp<const GrGeometryProcessor> gp,
const SkRect& rect,
const SkPMColor4f& color,
const GrPathUtils::QuadUVMatrix& devToUV) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<BezierQuadTestOp>(std::move(gp), rect, color, devToUV);
}
private:
friend class ::GrOpMemoryPool; // for ctor
BezierQuadTestOp(sk_sp<const GrGeometryProcessor> gp, const SkRect& rect,
const SkPMColor4f& color, const GrPathUtils::QuadUVMatrix& devToUV)
: INHERITED(std::move(gp), rect, color, ClassID()), fDevToUV(devToUV) {}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) override {
SkASSERT(this->gp()->vertexStride() == sizeof(Vertex));
QuadHelper helper(target, sizeof(Vertex), 1);
Vertex* verts = reinterpret_cast<Vertex*>(helper.vertices());
if (!verts) {
return;
}
SkRect rect = this->rect();
SkPointPriv::SetRectTriStrip(&verts[0].fPosition, rect, sizeof(Vertex));
fDevToUV.apply(verts, 4, sizeof(Vertex), sizeof(SkPoint));
helper.recordDraw(target, this->gp());
}
GrPathUtils::QuadUVMatrix fDevToUV;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef BezierTestOp INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier quad curves in the GPU backend.
*/
class BezierQuadEffects : public GpuGM {
public:
BezierQuadEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_quad_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(GrContext* context, GrRenderTargetContext* renderTargetContext,
SkCanvas* canvas) override {
struct Vertex {
SkPoint fPosition;
float fUV[4]; // The last two values are ignored. The effect expects a vec4f.
};
constexpr int kNumQuads = 5;
SkRandom rand;
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumQuads*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumQuads*3) / numCols);
SkScalar w = SkIntToScalar(renderTargetContext->width()) / numCols;
SkScalar h = SkIntToScalar(renderTargetContext->height()) / numRows;
int row = 0;
int col = 0;
SkPMColor4f color = SkPMColor4f::FromBytes_RGBA(0xff000000);
for (int i = 0; i < kNumQuads; ++i) {
SkPoint baseControlPts[] = {
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
for(int edgeType = 0; edgeType < kGrClipEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrClipEdgeType et = (GrClipEdgeType)edgeType;
gp = GrQuadEffect::Make(color, SkMatrix::I(), et, *context->priv().caps(),
SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = col * w;
SkScalar y = row * h;
SkPoint controlPts[] = {
{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
};
SkPoint chopped[5];
int cnt = SkChopQuadAtMaxCurvature(controlPts, chopped);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(controlPts[i], 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = chopped + 2 * c;
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(pts[i], 3.f, choppedPtPaint);
}
SkRect bounds;
bounds.set(pts, 3);
SkPaint boundsPaint;
boundsPaint.setColor(0xff808080);
boundsPaint.setStrokeWidth(0);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundsPaint);
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
GrPathUtils::QuadUVMatrix DevToUV(pts);
std::unique_ptr<GrDrawOp> op = BezierQuadTestOp::Make(context, gp,
bounds, color, DevToUV);
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new BezierConicEffects;)
DEF_GM(return new BezierQuadEffects;)
}
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