diff options
Diffstat (limited to 'samplecode/SampleRotateCircles.cpp')
| -rw-r--r-- | samplecode/SampleRotateCircles.cpp | 199 |
1 files changed, 162 insertions, 37 deletions
diff --git a/samplecode/SampleRotateCircles.cpp b/samplecode/SampleRotateCircles.cpp index f9b32ea417..06350ab5b4 100644 --- a/samplecode/SampleRotateCircles.cpp +++ b/samplecode/SampleRotateCircles.cpp @@ -11,6 +11,7 @@ #include "SkRandom.h" #include "SkRRect.h" #include "SkColorPriv.h" +#include "SkStrokerPriv.h" static void rotateAbout(SkCanvas* canvas, SkScalar degrees, SkScalar cx, SkScalar cy) { @@ -177,6 +178,12 @@ static int getOnCurvePoints(const SkPath& path, SkPoint storage[]) { #include "SkPathMeasure.h" +struct StrokeTypeButton { + SkRect fBounds; + char fLabel; + bool fEnabled; +}; + class TestStrokeView : public SampleView { enum { SKELETON_COLOR = 0xFF0000FF, @@ -187,7 +194,19 @@ class TestStrokeView : public SampleView { kCount = 9 }; SkPoint fPts[kCount]; + SkRect fErrorControl; + SkRect fWidthControl; + StrokeTypeButton fCubicButton; + StrokeTypeButton fQuadButton; + StrokeTypeButton fRRectButton; SkScalar fWidth, fDWidth; + bool fAnimate; +#if QUAD_STROKE_APPROXIMATION && defined(SK_DEBUG) + #define kStrokerErrorMin 0.001f + #define kStrokerErrorMax 5 +#endif + #define kWidthMin 1 + #define kWidthMax 100 public: TestStrokeView() { this->setBGColor(SK_ColorLTGRAY); @@ -206,6 +225,14 @@ public: fWidth = 50; fDWidth = 0.25f; + + fCubicButton.fLabel = 'C'; + fCubicButton.fEnabled = true; + fQuadButton.fLabel = 'Q'; + fQuadButton.fEnabled = true; + fRRectButton.fLabel = 'R'; + fRRectButton.fEnabled = true; + fAnimate = true; } protected: @@ -217,12 +244,21 @@ protected: return this->INHERITED::onQuery(evt); } + virtual void onSizeChange() { + fErrorControl.setXYWH(this->width() - 100, 30, 30, 400); + fWidthControl.setXYWH(this->width() - 50, 30, 30, 400); + fCubicButton.fBounds.setXYWH(this->width() - 50, 450, 30, 30); + fQuadButton.fBounds.setXYWH(this->width() - 50, 500, 30, 30); + fRRectButton.fBounds.setXYWH(this->width() - 50, 550, 30, 30); + this->INHERITED::onSizeChange(); + } + 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) { @@ -280,45 +316,95 @@ protected: draw_points(canvas, fill, WIREFRAME_COLOR, false); } + 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.setTextSize(25.0f); + paint.setColor(button.fEnabled ? 0xFF3F0000 : 0x6F3F0000); + paint.setTextAlign(SkPaint::kCenter_Align); + paint.setStyle(SkPaint::kFill_Style); + canvas->drawText(&button.fLabel, 1, button.fBounds.centerX(), button.fBounds.fBottom - 5, + paint); + } + + 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.setTextSize(11.0f); + paint.setStyle(SkPaint::kFill_Style); + canvas->drawText(label.c_str(), label.size(), bounds.fLeft + 5, yPos - 5, paint); + paint.setTextSize(13.0f); + canvas->drawText(name, strlen(name), bounds.fLeft, bounds.bottom() + 11, paint); + } + virtual void onDrawContent(SkCanvas* canvas) { SkPath path; SkScalar width = fWidth; - path.moveTo(fPts[0]); - path.cubicTo(fPts[1], fPts[2], fPts[3]); - draw_stroke(canvas, path, width); - - path.reset(); - path.moveTo(fPts[4]); - path.quadTo(fPts[5], fPts[6]); - draw_stroke(canvas, path, width); - - SkScalar rad = 32; - SkRect r; - r.set(&fPts[7], 2); - path.reset(); - SkRRect rr; - rr.setRectXY(r, rad, rad); - path.addRRect(rr); - draw_stroke(canvas, path, width); - - 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 (fCubicButton.fEnabled) { + path.moveTo(fPts[0]); + path.cubicTo(fPts[1], fPts[2], fPts[3]); + draw_stroke(canvas, path, width); + } - fWidth += fDWidth; - if (fDWidth > 0 && fWidth > 100) { - fDWidth = -fDWidth; - } else if (fDWidth < 0 && fWidth < 10) { - fDWidth = -fDWidth; + if (fQuadButton.fEnabled) { + path.reset(); + path.moveTo(fPts[4]); + path.quadTo(fPts[5], fPts[6]); + draw_stroke(canvas, path, width); } + + if (fRRectButton.fEnabled) { + SkScalar rad = 32; + SkRect r; + r.set(&fPts[7], 2); + path.reset(); + SkRRect rr; + rr.setRectXY(r, rad, rad); + path.addRRect(rr); + draw_stroke(canvas, path, width); + + 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 (fAnimate) { + fWidth += fDWidth; + if (fDWidth > 0 && fWidth > kWidthMax) { + fDWidth = -fDWidth; + } else if (fDWidth < 0 && fWidth < kWidthMin) { + fDWidth = -fDWidth; + } + } +#if QUAD_STROKE_APPROXIMATION && defined(SK_DEBUG) + draw_control(canvas, fErrorControl, gDebugStrokerError, kStrokerErrorMin, kStrokerErrorMax, + "error"); +#endif + draw_control(canvas, fWidthControl, fWidth, kWidthMin, kWidthMax, "width"); + draw_button(canvas, fQuadButton); + draw_button(canvas, fCubicButton); + draw_button(canvas, fRRectButton); this->inval(NULL); } @@ -335,14 +421,53 @@ protected: return new MyClick(this, (int)i); } } + const SkRect& rectPt = SkRect::MakeXYWH(x, y, 1, 1); +#if QUAD_STROKE_APPROXIMATION && defined(SK_DEBUG) + if (fErrorControl.contains(rectPt)) { + return new MyClick(this, (int) SK_ARRAY_COUNT(fPts) + 1); + } +#endif + if (fWidthControl.contains(rectPt)) { + return new MyClick(this, (int) SK_ARRAY_COUNT(fPts) + 3); + } + if (fCubicButton.fBounds.contains(rectPt)) { + fCubicButton.fEnabled ^= true; + return new MyClick(this, (int) SK_ARRAY_COUNT(fPts) + 4); + } + if (fQuadButton.fBounds.contains(rectPt)) { + fQuadButton.fEnabled ^= true; + return new MyClick(this, (int) SK_ARRAY_COUNT(fPts) + 5); + } + if (fRRectButton.fBounds.contains(rectPt)) { + fRRectButton.fEnabled ^= true; + return new MyClick(this, (int) SK_ARRAY_COUNT(fPts) + 6); + } return this->INHERITED::onFindClickHandler(x, y, modi); } + static SkScalar MapScreenYtoValue(int y, const SkRect& control, SkScalar min, + SkScalar max) { + return (SkIntToScalar(y) - control.fTop) / control.height() * (max - min) + min; + } + virtual bool onClick(Click* click) { int index = ((MyClick*)click)->fIndex; - fPts[index].offset(SkIntToScalar(click->fICurr.fX - click->fIPrev.fX), - SkIntToScalar(click->fICurr.fY - click->fIPrev.fY)); - this->inval(NULL); + if (index < (int) SK_ARRAY_COUNT(fPts)) { + fPts[index].offset(SkIntToScalar(click->fICurr.fX - click->fIPrev.fX), + SkIntToScalar(click->fICurr.fY - click->fIPrev.fY)); + this->inval(NULL); + } +#if QUAD_STROKE_APPROXIMATION && defined(SK_DEBUG) + else if (index == (int) SK_ARRAY_COUNT(fPts) + 1) { + gDebugStrokerError = MapScreenYtoValue(click->fICurr.fY, fErrorControl, + kStrokerErrorMin, kStrokerErrorMax); + gDebugStrokerErrorSet = true; + } +#endif + else if (index == (int) SK_ARRAY_COUNT(fPts) + 3) { + fWidth = MapScreenYtoValue(click->fICurr.fY, fWidthControl, kWidthMin, kWidthMax); + fAnimate = fWidth <= kWidthMin; + } return true; } |