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skia2/gm/beziereffects.cpp
Brian Salomon 82f4431915 Make GrPaints move their GrProcessor ownership into GrPipelineBuilder. 
This makes GrPaints usable only once. In some places we must make copies in order to issue draws with the same paint state.

Change-Id: Ie816e5185ce93a064111cad64c6880e1e21184c2
Reviewed-on: https://skia-review.googlesource.com/6844
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2017-01-11 19:56:48 +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.h"
#if SK_SUPPORT_GPU
#include "GrRenderTargetContextPriv.h"
#include "GrContext.h"
#include "GrPathUtils.h"
#include "GrTest.h"
#include "SkColorPriv.h"
#include "SkGeometry.h"
#include "ops/GrTestMeshDrawOp.h"
#include "effects/GrBezierEffect.h"
static inline SkScalar eval_line(const SkPoint& p, const SkScalar lineEq[3], SkScalar sign) {
return sign * (lineEq[0] * p.fX + lineEq[1] * p.fY + lineEq[2]);
}
namespace skiagm {
class BezierCubicOrConicTestOp : public GrTestMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
const char* name() const override { return "BezierCubicOrConicTestOp"; }
static std::unique_ptr<GrDrawOp> Make(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds,
GrColor color, const SkScalar klmEqs[9], SkScalar sign) {
return std::unique_ptr<GrDrawOp>(
new BezierCubicOrConicTestOp(gp, bounds, color, klmEqs, sign));
}
private:
BezierCubicOrConicTestOp(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds, GrColor color,
const SkScalar klmEqs[9], SkScalar sign)
: INHERITED(ClassID(), bounds, color), fGeometryProcessor(std::move(gp)) {
for (int i = 0; i < 9; i++) {
fKlmEqs[i] = klmEqs[i];
}
fSign = sign;
}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) const override {
QuadHelper helper;
size_t vertexStride = fGeometryProcessor->getVertexStride();
SkASSERT(vertexStride == sizeof(Vertex));
Vertex* verts = reinterpret_cast<Vertex*>(helper.init(target, vertexStride, 1));
if (!verts) {
return;
}
const SkRect& bounds = this->bounds();
verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom,
sizeof(Vertex));
for (int v = 0; v < 4; ++v) {
verts[v].fKLM[0] = eval_line(verts[v].fPosition, fKlmEqs + 0, fSign);
verts[v].fKLM[1] = eval_line(verts[v].fPosition, fKlmEqs + 3, fSign);
verts[v].fKLM[2] = eval_line(verts[v].fPosition, fKlmEqs + 6, 1.f);
}
helper.recordDraw(target, fGeometryProcessor.get());
}
SkScalar fKlmEqs[9];
SkScalar fSign;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef GrTestMeshDrawOp INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierCubicEffects : public GM {
public:
BezierCubicEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_cubic_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrRenderTargetContext* renderTargetContext =
canvas->internal_private_accessTopLayerRenderTargetContext();
if (!renderTargetContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
constexpr int kNumCubics = 15;
SkRandom rand;
// Mult by 3 for each edge effect type
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumCubics*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumCubics*3) / numCols);
SkScalar w = SkIntToScalar(renderTargetContext->width()) / numCols;
SkScalar h = SkIntToScalar(renderTargetContext->height()) / numRows;
int row = 0;
int col = 0;
constexpr GrColor color = 0xff000000;
for (int i = 0; i < kNumCubics; ++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)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
for(int edgeType = 0; edgeType < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrCubicEffect::Make(color, SkMatrix::I(), et, *context->caps());
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(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},
{x + baseControlPts[3].fX, y + baseControlPts[3].fY}
};
SkPoint chopped[10];
SkScalar klmEqs[9];
SkScalar klmSigns[3];
int cnt = GrPathUtils::chopCubicAtLoopIntersection(controlPts,
chopped,
klmEqs,
klmSigns);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 4; ++i) {
canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = chopped + 3 * c;
for (int i = 0; i < 4; ++i) {
canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtPaint);
}
SkRect bounds;
bounds.set(pts, 4);
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));
std::unique_ptr<GrDrawOp> op =
BezierCubicOrConicTestOp::Make(gp, bounds, color, klmEqs, klmSigns[c]);
renderTargetContext->priv().testingOnly_addDrawOp(
std::move(grPaint), GrAAType::kNone, std::move(op));
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierConicEffects : public GM {
public:
BezierConicEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_conic_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrRenderTargetContext* renderTargetContext =
canvas->internal_private_accessTopLayerRenderTargetContext();
if (!renderTargetContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
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;
constexpr GrColor color = 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 < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrConicEffect::Make(color, SkMatrix::I(), et,
*context->caps(), SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(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];
SkScalar klmEqs[9];
int cnt = chop_conic(controlPts, dst, weight);
GrPathUtils::getConicKLM(controlPts, weight, klmEqs);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 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].fX, pts[i].fY, 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);
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
std::unique_ptr<GrDrawOp> op =
BezierCubicOrConicTestOp::Make(gp, bounds, color, klmEqs, 1.f);
renderTargetContext->priv().testingOnly_addDrawOp(
std::move(grPaint), GrAAType::kNone, 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) {
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 GrTestMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
const char* name() const override { return "BezierQuadTestOp"; }
static std::unique_ptr<GrDrawOp> Make(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds,
GrColor color, const GrPathUtils::QuadUVMatrix& devToUV) {
return std::unique_ptr<GrDrawOp>(new BezierQuadTestOp(gp, bounds, color, devToUV));
}
private:
BezierQuadTestOp(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds, GrColor color,
const GrPathUtils::QuadUVMatrix& devToUV)
: INHERITED(ClassID(), bounds, color)
, fDevToUV(devToUV)
, fGeometryProcessor(std::move(gp)) {}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) const override {
QuadHelper helper;
size_t vertexStride = fGeometryProcessor->getVertexStride();
SkASSERT(vertexStride == sizeof(Vertex));
Vertex* verts = reinterpret_cast<Vertex*>(helper.init(target, vertexStride, 1));
if (!verts) {
return;
}
const SkRect& bounds = this->bounds();
verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom,
sizeof(Vertex));
fDevToUV.apply<4, sizeof(Vertex), sizeof(SkPoint)>(verts);
helper.recordDraw(target, fGeometryProcessor.get());
}
GrPathUtils::QuadUVMatrix fDevToUV;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef GrTestMeshDrawOp INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier quad curves in the GPU backend.
*/
class BezierQuadEffects : public GM {
public:
BezierQuadEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_quad_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrRenderTargetContext* renderTargetContext =
canvas->internal_private_accessTopLayerRenderTargetContext();
if (!renderTargetContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
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;
constexpr GrColor color = 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 < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrQuadEffect::Make(color, SkMatrix::I(), et,
*context->caps(), SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(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].fX, controlPts[i].fY, 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].fX, pts[i].fY, 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(gp, bounds, color, DevToUV);
renderTargetContext->priv().testingOnly_addDrawOp(
std::move(grPaint), GrAAType::kNone, std::move(op));
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new BezierCubicEffects;)
DEF_GM(return new BezierConicEffects;)
DEF_GM(return new BezierQuadEffects;)
}
#endif
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