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v811_spc009/external/skia/samplecode/SampleQuadStroker.cpp

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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathMeasure.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRRect.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/private/SkTArray.h"
#include "include/private/SkTemplates.h"
#include "include/utils/SkTextUtils.h"
#include "samplecode/Sample.h"
#include "src/core/SkGeometry.h"
#include "src/core/SkPathPriv.h"
#include "src/core/SkPointPriv.h"
#include "src/core/SkStroke.h"
#include "tools/ToolUtils.h"
#include <cfloat>
class SkEvent;
static bool hittest(const SkPoint& target, SkScalar x, SkScalar y) {
const SkScalar TOL = 7;
return SkPoint::Distance(target, SkPoint::Make(x, y)) <= TOL;
}
static int getOnCurvePoints(const SkPath& path, SkPoint storage[]) {
int count = 0;
for (auto [verb, pts, w] : SkPathPriv::Iterate(path)) {
switch (verb) {
case SkPathVerb::kMove:
case SkPathVerb::kLine:
case SkPathVerb::kQuad:
case SkPathVerb::kConic:
case SkPathVerb::kCubic:
storage[count++] = pts[0];
break;
default:
break;
}
}
return count;
}
static void getContourCounts(const SkPath& path, SkTArray<int>* contourCounts) {
int count = 0;
for (auto [verb, pts, w] : SkPathPriv::Iterate(path)) {
switch (verb) {
case SkPathVerb::kMove:
case SkPathVerb::kLine:
count += 1;
break;
case SkPathVerb::kQuad:
case SkPathVerb::kConic:
count += 2;
break;
case SkPathVerb::kCubic:
count += 3;
break;
case SkPathVerb::kClose:
contourCounts->push_back(count);
count = 0;
break;
default:
break;
}
}
if (count > 0) {
contourCounts->push_back(count);
}
}
static void erase(const sk_sp<SkSurface>& surface) {
SkCanvas* canvas = surface->getCanvas();
if (canvas) {
canvas->clear(SK_ColorTRANSPARENT);
}
}
struct StrokeTypeButton {
SkRect fBounds;
char fLabel;
bool fEnabled;
};
struct CircleTypeButton : public StrokeTypeButton {
bool fFill;
};
class QuadStrokerView : public Sample {
enum {
SKELETON_COLOR = 0xFF0000FF,
WIREFRAME_COLOR = 0x80FF0000
};
enum {
kCount = 18
};
SkPoint fPts[kCount];
SkRect fWeightControl;
SkRect fRadiusControl;
SkRect fErrorControl;
SkRect fWidthControl;
SkRect fBounds;
SkMatrix fMatrix, fInverse;
sk_sp<SkShader> fShader;
sk_sp<SkSurface> fMinSurface;
sk_sp<SkSurface> fMaxSurface;
StrokeTypeButton fCubicButton;
StrokeTypeButton fConicButton;
StrokeTypeButton fQuadButton;
StrokeTypeButton fArcButton;
StrokeTypeButton fRRectButton;
CircleTypeButton fCircleButton;
StrokeTypeButton fTextButton;
SkString fText;
SkScalar fTextSize;
SkScalar fWeight;
SkScalar fRadius;
SkScalar fWidth, fDWidth;
SkScalar fWidthScale;
int fW, fH, fZoom;
bool fAnimate;
bool fDrawRibs;
bool fDrawTangents;
bool fDrawTDivs;
#ifdef SK_DEBUG
#define kStrokerErrorMin 0.001f
#define kStrokerErrorMax 5
#endif
#define kWidthMin 1
#define kWidthMax 100
public:
QuadStrokerView() {
this->setBGColor(SK_ColorLTGRAY);
fPts[0].set(50, 200); // cubic
fPts[1].set(50, 100);
fPts[2].set(150, 50);
fPts[3].set(300, 50);
fPts[4].set(350, 200); // conic
fPts[5].set(350, 100);
fPts[6].set(450, 50);
fPts[7].set(150, 300); // quad
fPts[8].set(150, 200);
fPts[9].set(250, 150);
fPts[10].set(250, 200); // arc
fPts[11].set(250, 300);
fPts[12].set(150, 350);
fPts[13].set(200, 200); // rrect
fPts[14].set(400, 400);
fPts[15].set(250, 250); // oval
fPts[16].set(450, 450);
fText = "a";
fTextSize = 12;
fWidth = 50;
fDWidth = 0.25f;
fWeight = 1;
fRadius = 150;
fCubicButton.fLabel = 'C';
fCubicButton.fEnabled = false;
fConicButton.fLabel = 'K';
fConicButton.fEnabled = false;
fQuadButton.fLabel = 'Q';
fQuadButton.fEnabled = false;
fArcButton.fLabel = 'A';
fArcButton.fEnabled = true;
fRRectButton.fLabel = 'R';
fRRectButton.fEnabled = false;
fCircleButton.fLabel = 'O';
fCircleButton.fEnabled = true;
fCircleButton.fFill = true;
fTextButton.fLabel = 'T';
fTextButton.fEnabled = false;
fAnimate = false;
setAsNeeded();
}
protected:
SkString name() override { return SkString("QuadStroker"); }
bool onChar(SkUnichar uni) override {
if (fTextButton.fEnabled) {
switch (uni) {
case ' ':
fText = "";
break;
case '-':
fTextSize = std::max(1.0f, fTextSize - 1);
break;
case '+':
case '=':
fTextSize += 1;
break;
default:
fText.appendUnichar(uni);
}
return true;
}
return false;
}
void onSizeChange() override {
fRadiusControl.setXYWH(this->width() - 200, 30, 30, 400);
fWeightControl.setXYWH(this->width() - 150, 30, 30, 400);
fErrorControl.setXYWH(this->width() - 100, 30, 30, 400);
fWidthControl.setXYWH(this->width() - 50, 30, 30, 400);
int buttonOffset = 450;
fCubicButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fConicButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fQuadButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fArcButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fRRectButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fCircleButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
buttonOffset += 50;
fTextButton.fBounds.setXYWH(this->width() - 50, SkIntToScalar(buttonOffset), 30, 30);
this->INHERITED::onSizeChange();
}
void copyMinToMax() {
erase(fMaxSurface);
SkCanvas* canvas = fMaxSurface->getCanvas();
canvas->save();
canvas->concat(fMatrix);
fMinSurface->draw(canvas, 0, 0);
canvas->restore();
SkPaint paint;
paint.setBlendMode(SkBlendMode::kClear);
for (int iy = 1; iy < fH; ++iy) {
SkScalar y = SkIntToScalar(iy * fZoom);
canvas->drawLine(0, y - SK_ScalarHalf, 999, y - SK_ScalarHalf, paint);
}
for (int ix = 1; ix < fW; ++ix) {
SkScalar x = SkIntToScalar(ix * fZoom);
canvas->drawLine(x - SK_ScalarHalf, 0, x - SK_ScalarHalf, 999, paint);
}
}
void setWHZ(int width, int height, int zoom) {
fZoom = zoom;
fBounds.setIWH(width * zoom, height * zoom);
fMatrix.setScale(SkIntToScalar(zoom), SkIntToScalar(zoom));
fInverse.setScale(SK_Scalar1 / zoom, SK_Scalar1 / zoom);
fShader = ToolUtils::create_checkerboard_shader(0xFFCCCCCC, 0xFFFFFFFF, zoom);
SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
fMinSurface = SkSurface::MakeRaster(info);
info = info.makeWH(width * zoom, height * zoom);
fMaxSurface = SkSurface::MakeRaster(info);
}
void draw_points(SkCanvas* canvas, const SkPath& path, SkColor color,
bool show_lines) {
SkPaint paint;
paint.setColor(color);
paint.setAlpha(0x80);
paint.setAntiAlias(true);
int n = path.countPoints();
SkAutoSTArray<32, SkPoint> pts(n);
if (show_lines && fDrawTangents) {
SkTArray<int> contourCounts;
getContourCounts(path, &contourCounts);
SkPoint* ptPtr = pts.get();
for (int i = 0; i < contourCounts.count(); ++i) {
int count = contourCounts[i];
path.getPoints(ptPtr, count);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, count, ptPtr, paint);
ptPtr += count;
}
} else {
n = getOnCurvePoints(path, pts.get());
}
paint.setStrokeWidth(5);
canvas->drawPoints(SkCanvas::kPoints_PointMode, n, pts.get(), paint);
}
void draw_ribs(SkCanvas* canvas, const SkPath& path, SkScalar width,
SkColor color) {
const SkScalar radius = width / 2;
SkPathMeasure meas(path, false);
SkScalar total = meas.getLength();
SkScalar delta = 8;
SkPaint paint, labelP;
paint.setColor(color);
labelP.setColor(color & 0xff5f9f5f);
SkFont font;
SkPoint pos, tan;
int index = 0;
for (SkScalar dist = 0; dist <= total; dist += delta) {
if (meas.getPosTan(dist, &pos, &tan)) {
tan.scale(radius);
SkPointPriv::RotateCCW(&tan);
canvas->drawLine(pos.x() + tan.x(), pos.y() + tan.y(),
pos.x() - tan.x(), pos.y() - tan.y(), paint);
if (0 == index % 10) {
SkString label;
label.appendS32(index);
SkRect dot = SkRect::MakeXYWH(pos.x() - 2, pos.y() - 2, 4, 4);
canvas->drawRect(dot, labelP);
canvas->drawString(label,
pos.x() - tan.x() * 1.25f, pos.y() - tan.y() * 1.25f, font, labelP);
}
}
++index;
}
}
void draw_t_divs(SkCanvas* canvas, const SkPath& path, SkScalar width, SkColor color) {
const SkScalar radius = width / 2;
SkPaint paint;
paint.setColor(color);
SkPathMeasure meas(path, false);
SkScalar total = meas.getLength();
SkScalar delta = 8;
int ribs = 0;
for (SkScalar dist = 0; dist <= total; dist += delta) {
++ribs;
}
const uint8_t* verbs = SkPathPriv::VerbData(path);
if (path.countVerbs() < 2 || SkPath::kMove_Verb != verbs[0]) {
SkASSERT(0);
return;
}
auto verb = static_cast<SkPath::Verb>(verbs[1]);
SkASSERT(SkPath::kLine_Verb <= verb && verb <= SkPath::kCubic_Verb);
const SkPoint* pts = SkPathPriv::PointData(path);
SkPoint pos, tan;
for (int index = 0; index < ribs; ++index) {
SkScalar t = (SkScalar) index / ribs;
switch (verb) {
case SkPath::kLine_Verb:
tan = pts[1] - pts[0];
pos = pts[0];
pos.fX += tan.fX * t;
pos.fY += tan.fY * t;
break;
case SkPath::kQuad_Verb:
pos = SkEvalQuadAt(pts, t);
tan = SkEvalQuadTangentAt(pts, t);
break;
case SkPath::kConic_Verb: {
SkConic conic(pts, SkPathPriv::ConicWeightData(path)[0]);
pos = conic.evalAt(t);
tan = conic.evalTangentAt(t);
} break;
case SkPath::kCubic_Verb:
SkEvalCubicAt(pts, t, &pos, &tan, nullptr);
break;
default:
SkASSERT(0);
return;
}
tan.setLength(radius);
SkPointPriv::RotateCCW(&tan);
canvas->drawLine(pos.x() + tan.x(), pos.y() + tan.y(),
pos.x() - tan.x(), pos.y() - tan.y(), paint);
if (0 == index % 10) {
SkString label;
label.appendS32(index);
canvas->drawString(label,
pos.x() + tan.x() * 1.25f, pos.y() + tan.y() * 1.25f, SkFont(), paint);
}
}
}
void draw_stroke(SkCanvas* canvas, const SkPath& path, SkScalar width, SkScalar scale,
bool drawText) {
if (path.isEmpty()) {
return;
}
SkRect bounds = path.getBounds();
this->setWHZ(SkScalarCeilToInt(bounds.right()), drawText
? SkScalarRoundToInt(scale * 3 / 2) : SkScalarRoundToInt(scale),
SkScalarRoundToInt(950.0f / scale));
erase(fMinSurface);
SkPaint paint;
paint.setColor(0x1f1f0f0f);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(width * scale * scale);
paint.setColor(0x3f0f1f3f);
if (drawText) {
fMinSurface->getCanvas()->drawPath(path, paint);
this->copyMinToMax();
fMaxSurface->draw(canvas, 0, 0);
}
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(1);
paint.setColor(SKELETON_COLOR);
SkPath scaled;
SkMatrix matrix;
matrix.reset();
matrix.setScale(950 / scale, 950 / scale);
if (drawText) {
path.transform(matrix, &scaled);
} else {
scaled = path;
}
canvas->drawPath(scaled, paint);
draw_points(canvas, scaled, SKELETON_COLOR, true);
if (fDrawRibs) {
draw_ribs(canvas, scaled, width, 0xFF00FF00);
}
if (fDrawTDivs) {
draw_t_divs(canvas, scaled, width, 0xFF3F3F00);
}
SkPath fill;
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
if (drawText) {
p.setStrokeWidth(width * scale * scale);
} else {
p.setStrokeWidth(width);
}
p.getFillPath(path, &fill);
SkPath scaledFill;
if (drawText) {
fill.transform(matrix, &scaledFill);
} else {
scaledFill = fill;
}
paint.setColor(WIREFRAME_COLOR);
canvas->drawPath(scaledFill, paint);
draw_points(canvas, scaledFill, WIREFRAME_COLOR, false);
}
void draw_fill(SkCanvas* canvas, const SkRect& rect, SkScalar width) {
if (rect.isEmpty()) {
return;
}
SkPaint paint;
paint.setColor(0x1f1f0f0f);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(width);
SkPath path;
SkScalar maxSide = std::max(rect.width(), rect.height()) / 2;
SkPoint center = { rect.fLeft + maxSide, rect.fTop + maxSide };
path.addCircle(center.fX, center.fY, maxSide);
canvas->drawPath(path, paint);
paint.setStyle(SkPaint::kFill_Style);
path.reset();
path.addCircle(center.fX, center.fY, maxSide - width / 2);
paint.setColor(0x3f0f1f3f);
canvas->drawPath(path, paint);
path.reset();
path.setFillType(SkPathFillType::kEvenOdd);
path.addCircle(center.fX, center.fY, maxSide + width / 2);
SkRect outside = SkRect::MakeXYWH(center.fX - maxSide - width, center.fY - maxSide - width,
(maxSide + width) * 2, (maxSide + width) * 2);
path.addRect(outside);
canvas->drawPath(path, paint);
}
void draw_button(SkCanvas* canvas, const StrokeTypeButton& button) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(button.fEnabled ? 0xFF3F0000 : 0x6F3F0000);
canvas->drawRect(button.fBounds, paint);
paint.setColor(button.fEnabled ? 0xFF3F0000 : 0x6F3F0000);
paint.setStyle(SkPaint::kFill_Style);
SkFont font;
font.setSize(25.0f);
SkTextUtils::Draw(canvas, &button.fLabel, 1, SkTextEncoding::kUTF8,
button.fBounds.centerX(), button.fBounds.fBottom - 5,
font, paint, SkTextUtils::kCenter_Align);
}
void draw_control(SkCanvas* canvas, const SkRect& bounds, SkScalar value,
SkScalar min, SkScalar max, const char* name) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, paint);
SkScalar scale = max - min;
SkScalar yPos = bounds.fTop + (value - min) * bounds.height() / scale;
paint.setColor(0xFFFF0000);
canvas->drawLine(bounds.fLeft - 5, yPos, bounds.fRight + 5, yPos, paint);
SkString label;
label.printf("%0.3g", value);
paint.setColor(0xFF000000);
paint.setStyle(SkPaint::kFill_Style);
SkFont font(nullptr, 11.0f);
canvas->drawString(label, bounds.fLeft + 5, yPos - 5, font, paint);
font.setSize(13.0f);
canvas->drawString(name, bounds.fLeft, bounds.bottom() + 11, font, paint);
}
void setForGeometry() {
fDrawRibs = true;
fDrawTangents = true;
fDrawTDivs = false;
fWidthScale = 1;
}
void setForText() {
fDrawRibs = fDrawTangents = fDrawTDivs = false;
fWidthScale = 0.002f;
}
void setForSingles() {
setForGeometry();
fDrawTDivs = true;
}
void setAsNeeded() {
if (fConicButton.fEnabled || fCubicButton.fEnabled || fQuadButton.fEnabled) {
setForSingles();
} else if (fRRectButton.fEnabled || fCircleButton.fEnabled || fArcButton.fEnabled) {
setForGeometry();
} else {
setForText();
}
}
bool arcCenter(SkPoint* center) {
SkPath path;
path.moveTo(fPts[10]);
path.arcTo(fPts[11], fPts[12], fRadius);
SkPath::Iter iter(path, false);
SkPoint pts[4];
iter.next(pts);
if (SkPath::kLine_Verb == iter.next(pts)) {
iter.next(pts);
}
SkVector before = pts[0] - pts[1];
SkVector after = pts[1] - pts[2];
before.setLength(fRadius);
after.setLength(fRadius);
SkVector beforeCCW, afterCCW;
SkPointPriv::RotateCCW(before, &beforeCCW);
SkPointPriv::RotateCCW(after, &afterCCW);
beforeCCW += pts[0];
afterCCW += pts[2];
*center = beforeCCW;
if (SkScalarNearlyEqual(beforeCCW.fX, afterCCW.fX)
&& SkScalarNearlyEqual(beforeCCW.fY, afterCCW.fY)) {
return true;
}
SkVector beforeCW, afterCW;
SkPointPriv::RotateCW(before, &beforeCW);
SkPointPriv::RotateCW(after, &afterCW);
beforeCW += pts[0];
afterCW += pts[2];
*center = beforeCW;
return SkScalarNearlyEqual(beforeCW.fX, afterCW.fX)
&& SkScalarNearlyEqual(beforeCCW.fY, afterCW.fY);
}
void onDrawContent(SkCanvas* canvas) override {
SkPath path;
SkScalar width = fWidth;
if (fCubicButton.fEnabled) {
path.moveTo(fPts[0]);
path.cubicTo(fPts[1], fPts[2], fPts[3]);
setForSingles();
draw_stroke(canvas, path, width, 950, false);
}
if (fConicButton.fEnabled) {
path.reset();
path.moveTo(fPts[4]);
path.conicTo(fPts[5], fPts[6], fWeight);
setForSingles();
draw_stroke(canvas, path, width, 950, false);
}
if (fQuadButton.fEnabled) {
path.reset();
path.moveTo(fPts[7]);
path.quadTo(fPts[8], fPts[9]);
setForSingles();
draw_stroke(canvas, path, width, 950, false);
}
if (fArcButton.fEnabled) {
path.reset();
path.moveTo(fPts[10]);
path.arcTo(fPts[11], fPts[12], fRadius);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
SkPath pathPts;
pathPts.moveTo(fPts[10]);
pathPts.lineTo(fPts[11]);
pathPts.lineTo(fPts[12]);
draw_points(canvas, pathPts, SK_ColorDKGRAY, true);
}
if (fRRectButton.fEnabled) {
SkScalar rad = 32;
SkRect r;
r.setBounds(&fPts[13], 2);
path.reset();
SkRRect rr;
rr.setRectXY(r, rad, rad);
path.addRRect(rr);
setForGeometry();
draw_stroke(canvas, path, width, 950, false);
path.reset();
SkRRect rr2;
rr.inset(width/2, width/2, &rr2);
path.addRRect(rr2, SkPathDirection::kCCW);
rr.inset(-width/2, -width/2, &rr2);
path.addRRect(rr2, SkPathDirection::kCW);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0x40FF8844);
canvas->drawPath(path, paint);
}
if (fCircleButton.fEnabled) {
path.reset();
SkRect r;
r.setBounds(&fPts[15], 2);
path.addOval(r);
setForGeometry();
if (fCircleButton.fFill) {
if (fArcButton.fEnabled) {
SkPoint center;
if (arcCenter(&center)) {
r.setLTRB(center.fX - fRadius, center.fY - fRadius,
center.fX + fRadius, center.fY + fRadius);
}
}
draw_fill(canvas, r, width);
} else {
draw_stroke(canvas, path, width, 950, false);
}
}
if (fTextButton.fEnabled) {
path.reset();
SkFont font;
font.setSize(fTextSize);
SkTextUtils::GetPath(fText.c_str(), fText.size(), SkTextEncoding::kUTF8,
0, fTextSize, font, &path);
setForText();
draw_stroke(canvas, path, width * fWidthScale / fTextSize, fTextSize, true);
}
if (fAnimate) {
fWidth += fDWidth;
if (fDWidth > 0 && fWidth > kWidthMax) {
fDWidth = -fDWidth;
} else if (fDWidth < 0 && fWidth < kWidthMin) {
fDWidth = -fDWidth;
}
}
setAsNeeded();
if (fConicButton.fEnabled) {
draw_control(canvas, fWeightControl, fWeight, 0, 5, "weight");
}
if (fArcButton.fEnabled) {
draw_control(canvas, fRadiusControl, fRadius, 0, 500, "radius");
}
#ifdef SK_DEBUG
draw_control(canvas, fErrorControl, gDebugStrokerError, kStrokerErrorMin, kStrokerErrorMax,
"error");
#endif
draw_control(canvas, fWidthControl, fWidth * fWidthScale, kWidthMin * fWidthScale,
kWidthMax * fWidthScale, "width");
draw_button(canvas, fQuadButton);
draw_button(canvas, fCubicButton);
draw_button(canvas, fConicButton);
draw_button(canvas, fArcButton);
draw_button(canvas, fRRectButton);
draw_button(canvas, fCircleButton);
draw_button(canvas, fTextButton);
}
class MyClick : public Click {
public:
int fIndex;
MyClick(int index) : fIndex(index) {}
};
Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey modi) override {
for (size_t i = 0; i < SK_ARRAY_COUNT(fPts); ++i) {
if (hittest(fPts[i], x, y)) {
return new MyClick((int)i);
}
}
const SkRect& rectPt = SkRect::MakeXYWH(x, y, 1, 1);
if (fWeightControl.contains(rectPt)) {
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 1);
}
if (fRadiusControl.contains(rectPt)) {
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 2);
}
#ifdef SK_DEBUG
if (fErrorControl.contains(rectPt)) {
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 3);
}
#endif
if (fWidthControl.contains(rectPt)) {
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 4);
}
if (fCubicButton.fBounds.contains(rectPt)) {
fCubicButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 5);
}
if (fConicButton.fBounds.contains(rectPt)) {
fConicButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 6);
}
if (fQuadButton.fBounds.contains(rectPt)) {
fQuadButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 7);
}
if (fArcButton.fBounds.contains(rectPt)) {
fArcButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 8);
}
if (fRRectButton.fBounds.contains(rectPt)) {
fRRectButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 9);
}
if (fCircleButton.fBounds.contains(rectPt)) {
bool wasEnabled = fCircleButton.fEnabled;
fCircleButton.fEnabled = !fCircleButton.fFill;
fCircleButton.fFill = wasEnabled && !fCircleButton.fFill;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 10);
}
if (fTextButton.fBounds.contains(rectPt)) {
fTextButton.fEnabled ^= true;
return new MyClick((int) SK_ARRAY_COUNT(fPts) + 11);
}
return nullptr;
}
static SkScalar MapScreenYtoValue(SkScalar y, const SkRect& control, SkScalar min,
SkScalar max) {
return (y - control.fTop) / control.height() * (max - min) + min;
}
bool onClick(Click* click) override {
int index = ((MyClick*)click)->fIndex;
if (index < (int) SK_ARRAY_COUNT(fPts)) {
fPts[index].offset(click->fCurr.fX - click->fPrev.fX,
click->fCurr.fY - click->fPrev.fY);
} else if (index == (int) SK_ARRAY_COUNT(fPts) + 1) {
fWeight = MapScreenYtoValue(click->fCurr.fY, fWeightControl, 0, 5);
} else if (index == (int) SK_ARRAY_COUNT(fPts) + 2) {
fRadius = MapScreenYtoValue(click->fCurr.fY, fRadiusControl, 0, 500);
}
#ifdef SK_DEBUG
else if (index == (int) SK_ARRAY_COUNT(fPts) + 3) {
gDebugStrokerError = std::max(FLT_EPSILON, MapScreenYtoValue(click->fCurr.fY,
fErrorControl, kStrokerErrorMin, kStrokerErrorMax));
gDebugStrokerErrorSet = true;
}
#endif
else if (index == (int) SK_ARRAY_COUNT(fPts) + 4) {
fWidth = std::max(FLT_EPSILON, MapScreenYtoValue(click->fCurr.fY, fWidthControl,
kWidthMin, kWidthMax));
fAnimate = fWidth <= kWidthMin;
}
return true;
}
private:
using INHERITED = Sample;
};
///////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new QuadStrokerView(); )
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