| /* |
| * 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/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[]) { |
| SkPath::RawIter iter(path); |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| |
| int count = 0; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| case SkPath::kLine_Verb: |
| case SkPath::kQuad_Verb: |
| case SkPath::kConic_Verb: |
| case SkPath::kCubic_Verb: |
| storage[count++] = pts[0]; |
| break; |
| default: |
| break; |
| } |
| } |
| return count; |
| } |
| |
| static void getContourCounts(const SkPath& path, SkTArray<int>* contourCounts) { |
| SkPath::RawIter iter(path); |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| |
| int count = 0; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| case SkPath::kLine_Verb: |
| count += 1; |
| break; |
| case SkPath::kQuad_Verb: |
| case SkPath::kConic_Verb: |
| count += 2; |
| break; |
| case SkPath::kCubic_Verb: |
| count += 3; |
| break; |
| case SkPath::kClose_Verb: |
| 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 = SkTMax(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, nullptr); |
| 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.set(0, 0, SkIntToScalar(width * zoom), SkIntToScalar(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; |
| } |
| SkPath::RawIter iter(path); |
| SkPoint pts[4]; |
| if (SkPath::kMove_Verb != iter.next(pts)) { |
| SkASSERT(0); |
| return; |
| } |
| SkPath::Verb verb = iter.next(pts); |
| SkASSERT(SkPath::kLine_Verb <= verb && verb <= SkPath::kCubic_Verb); |
| 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, iter.conicWeight()); |
| 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, nullptr); |
| } |
| 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 = SkTMax(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(SkPath::kEvenOdd_FillType); |
| 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.set(&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, SkPath::kCCW_Direction); |
| rr.inset(-width/2, -width/2, &rr2); |
| path.addRRect(rr2, SkPath::kCW_Direction); |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setColor(0x40FF8844); |
| canvas->drawPath(path, paint); |
| } |
| |
| if (fCircleButton.fEnabled) { |
| path.reset(); |
| SkRect r; |
| r.set(&fPts[15], 2); |
| path.addOval(r); |
| setForGeometry(); |
| if (fCircleButton.fFill) { |
| if (fArcButton.fEnabled) { |
| SkPoint center; |
| if (arcCenter(¢er)) { |
| r.set(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) {} |
| }; |
| |
| virtual Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, |
| 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 = SkTMax(FLT_EPSILON, MapScreenYtoValue(click->fCurr.fY, |
| fErrorControl, kStrokerErrorMin, kStrokerErrorMax)); |
| gDebugStrokerErrorSet = true; |
| } |
| #endif |
| else if (index == (int) SK_ARRAY_COUNT(fPts) + 4) { |
| fWidth = SkTMax(FLT_EPSILON, MapScreenYtoValue(click->fCurr.fY, fWidthControl, |
| kWidthMin, kWidthMax)); |
| fAnimate = fWidth <= kWidthMin; |
| } |
| return true; |
| } |
| |
| private: |
| typedef Sample INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new QuadStrokerView(); ) |