| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SampleCode.h" |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkGeometry.h" |
| #include "SkIntersections.h" |
| #include "SkMacros.h" |
| #include "SkOpEdgeBuilder.h" |
| // #include "SkPathOpsSimplifyAA.h" |
| // #include "SkPathStroker.h" |
| #include "SkPointPriv.h" |
| #include "SkString.h" |
| #include "SkView.h" |
| |
| #if 0 |
| void SkStrokeSegment::dump() const { |
| SkDebugf("{{{%1.9g,%1.9g}, {%1.9g,%1.9g}", fPts[0].fX, fPts[0].fY, fPts[1].fX, fPts[1].fY); |
| if (SkPath::kQuad_Verb == fVerb) { |
| SkDebugf(", {%1.9g,%1.9g}", fPts[2].fX, fPts[2].fY); |
| } |
| SkDebugf("}}"); |
| #ifdef SK_DEBUG |
| SkDebugf(" id=%d", fDebugID); |
| #endif |
| SkDebugf("\n"); |
| } |
| |
| void SkStrokeSegment::dumpAll() const { |
| const SkStrokeSegment* segment = this; |
| while (segment) { |
| segment->dump(); |
| segment = segment->fNext; |
| } |
| } |
| |
| void SkStrokeTriple::dump() const { |
| SkDebugf("{{{%1.9g,%1.9g}, {%1.9g,%1.9g}", fPts[0].fX, fPts[0].fY, fPts[1].fX, fPts[1].fY); |
| if (SkPath::kQuad_Verb <= fVerb) { |
| SkDebugf(", {%1.9g,%1.9g}", fPts[2].fX, fPts[2].fY); |
| } |
| if (SkPath::kCubic_Verb == fVerb) { |
| SkDebugf(", {%1.9g,%1.9g}", fPts[3].fX, fPts[3].fY); |
| } else if (SkPath::kConic_Verb == fVerb) { |
| SkDebugf(", %1.9g", weight()); |
| } |
| SkDebugf("}}"); |
| #ifdef SK_DEBUG |
| SkDebugf(" triple id=%d", fDebugID); |
| #endif |
| SkDebugf("\ninner:\n"); |
| fInner->dumpAll(); |
| SkDebugf("outer:\n"); |
| fOuter->dumpAll(); |
| SkDebugf("join:\n"); |
| fJoin->dumpAll(); |
| } |
| |
| void SkStrokeTriple::dumpAll() const { |
| const SkStrokeTriple* triple = this; |
| while (triple) { |
| triple->dump(); |
| triple = triple->fNext; |
| } |
| } |
| |
| void SkStrokeContour::dump() const { |
| #ifdef SK_DEBUG |
| SkDebugf("id=%d ", fDebugID); |
| #endif |
| SkDebugf("head:\n"); |
| fHead->dumpAll(); |
| SkDebugf("head cap:\n"); |
| fHeadCap->dumpAll(); |
| SkDebugf("tail cap:\n"); |
| fTailCap->dumpAll(); |
| } |
| |
| void SkStrokeContour::dumpAll() const { |
| const SkStrokeContour* contour = this; |
| while (contour) { |
| contour->dump(); |
| contour = contour->fNext; |
| } |
| } |
| #endif |
| |
| SkScalar gCurveDistance = 10; |
| |
| #if 0 // unused |
| static SkPath::Verb get_path_verb(int index, const SkPath& path) { |
| if (index < 0) { |
| return SkPath::kMove_Verb; |
| } |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(path, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| if (++counter < index) { |
| continue; |
| } |
| return verb; |
| } |
| SkASSERT(0); |
| return SkPath::kMove_Verb; |
| } |
| #endif |
| |
| static SkScalar get_path_weight(int index, const SkPath& path) { |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(path, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| if (++counter < index) { |
| continue; |
| } |
| return verb == SkPath::kConic_Verb ? iter.conicWeight() : 1; |
| } |
| SkASSERT(0); |
| return 0; |
| } |
| |
| static void set_path_pt(int index, const SkPoint& pt, SkPath* path) { |
| SkPath result; |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::RawIter iter(*path); |
| int startIndex = 0; |
| int endIndex = 0; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| endIndex += 1; |
| break; |
| case SkPath::kLine_Verb: |
| endIndex += 1; |
| break; |
| case SkPath::kQuad_Verb: |
| case SkPath::kConic_Verb: |
| endIndex += 2; |
| break; |
| case SkPath::kCubic_Verb: |
| endIndex += 3; |
| break; |
| case SkPath::kClose_Verb: |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| if (startIndex <= index && index < endIndex) { |
| pts[index - startIndex] = pt; |
| index = -1; |
| } |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| result.moveTo(pts[0]); |
| break; |
| case SkPath::kLine_Verb: |
| result.lineTo(pts[1]); |
| startIndex += 1; |
| break; |
| case SkPath::kQuad_Verb: |
| result.quadTo(pts[1], pts[2]); |
| startIndex += 2; |
| break; |
| case SkPath::kConic_Verb: |
| result.conicTo(pts[1], pts[2], iter.conicWeight()); |
| startIndex += 2; |
| break; |
| case SkPath::kCubic_Verb: |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| startIndex += 3; |
| break; |
| case SkPath::kClose_Verb: |
| result.close(); |
| startIndex += 1; |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| #if 0 |
| SkDebugf("\n\noriginal\n"); |
| path->dump(); |
| SkDebugf("\nedited\n"); |
| result.dump(); |
| #endif |
| *path = result; |
| } |
| |
| static void add_path_segment(int index, SkPath* path) { |
| SkPath result; |
| SkPoint pts[4]; |
| SkPoint firstPt = { 0, 0 }; // init to avoid warning |
| SkPoint lastPt = { 0, 0 }; // init to avoid warning |
| SkPath::Verb verb; |
| SkPath::RawIter iter(*path); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| SkScalar weight SK_INIT_TO_AVOID_WARNING; |
| if (++counter == index) { |
| switch (verb) { |
| case SkPath::kLine_Verb: |
| result.lineTo((pts[0].fX + pts[1].fX) / 2, (pts[0].fY + pts[1].fY) / 2); |
| break; |
| case SkPath::kQuad_Verb: { |
| SkPoint chop[5]; |
| SkChopQuadAtHalf(pts, chop); |
| result.quadTo(chop[1], chop[2]); |
| pts[1] = chop[3]; |
| } break; |
| case SkPath::kConic_Verb: { |
| SkConic chop[2]; |
| SkConic conic; |
| conic.set(pts, iter.conicWeight()); |
| if (!conic.chopAt(0.5f, chop)) { |
| return; |
| } |
| result.conicTo(chop[0].fPts[1], chop[0].fPts[2], chop[0].fW); |
| pts[1] = chop[1].fPts[1]; |
| weight = chop[1].fW; |
| } break; |
| case SkPath::kCubic_Verb: { |
| SkPoint chop[7]; |
| SkChopCubicAtHalf(pts, chop); |
| result.cubicTo(chop[1], chop[2], chop[3]); |
| pts[1] = chop[4]; |
| pts[2] = chop[5]; |
| } break; |
| case SkPath::kClose_Verb: { |
| result.lineTo((lastPt.fX + firstPt.fX) / 2, (lastPt.fY + firstPt.fY) / 2); |
| } break; |
| default: |
| SkASSERT(0); |
| } |
| } else if (verb == SkPath::kConic_Verb) { |
| weight = iter.conicWeight(); |
| } |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| result.moveTo(firstPt = pts[0]); |
| break; |
| case SkPath::kLine_Verb: |
| result.lineTo(lastPt = pts[1]); |
| break; |
| case SkPath::kQuad_Verb: |
| result.quadTo(pts[1], lastPt = pts[2]); |
| break; |
| case SkPath::kConic_Verb: |
| result.conicTo(pts[1], lastPt = pts[2], weight); |
| break; |
| case SkPath::kCubic_Verb: |
| result.cubicTo(pts[1], pts[2], lastPt = pts[3]); |
| break; |
| case SkPath::kClose_Verb: |
| result.close(); |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| *path = result; |
| } |
| |
| static void delete_path_segment(int index, SkPath* path) { |
| SkPath result; |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::RawIter iter(*path); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| if (++counter == index) { |
| continue; |
| } |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| result.moveTo(pts[0]); |
| break; |
| case SkPath::kLine_Verb: |
| result.lineTo(pts[1]); |
| break; |
| case SkPath::kQuad_Verb: |
| result.quadTo(pts[1], pts[2]); |
| break; |
| case SkPath::kConic_Verb: |
| result.conicTo(pts[1], pts[2], iter.conicWeight()); |
| break; |
| case SkPath::kCubic_Verb: |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| break; |
| case SkPath::kClose_Verb: |
| result.close(); |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| *path = result; |
| } |
| |
| static void set_path_weight(int index, SkScalar w, SkPath* path) { |
| SkPath result; |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(*path, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| ++counter; |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| result.moveTo(pts[0]); |
| break; |
| case SkPath::kLine_Verb: |
| result.lineTo(pts[1]); |
| break; |
| case SkPath::kQuad_Verb: |
| result.quadTo(pts[1], pts[2]); |
| break; |
| case SkPath::kConic_Verb: |
| result.conicTo(pts[1], pts[2], counter == index ? w : iter.conicWeight()); |
| break; |
| case SkPath::kCubic_Verb: |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| break; |
| case SkPath::kClose_Verb: |
| result.close(); |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| *path = result; |
| } |
| |
| static void set_path_verb(int index, SkPath::Verb v, SkPath* path, SkScalar w) { |
| SkASSERT(SkPath::kLine_Verb <= v && v <= SkPath::kCubic_Verb); |
| SkPath result; |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(*path, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| SkScalar weight = verb == SkPath::kConic_Verb ? iter.conicWeight() : 1; |
| if (++counter == index && v != verb) { |
| SkASSERT(SkPath::kLine_Verb <= verb && verb <= SkPath::kCubic_Verb); |
| switch (verb) { |
| case SkPath::kLine_Verb: |
| switch (v) { |
| case SkPath::kConic_Verb: |
| weight = w; |
| case SkPath::kQuad_Verb: |
| pts[2] = pts[1]; |
| pts[1].fX = (pts[0].fX + pts[2].fX) / 2; |
| pts[1].fY = (pts[0].fY + pts[2].fY) / 2; |
| break; |
| case SkPath::kCubic_Verb: |
| pts[3] = pts[1]; |
| pts[1].fX = (pts[0].fX * 2 + pts[3].fX) / 3; |
| pts[1].fY = (pts[0].fY * 2 + pts[3].fY) / 3; |
| pts[2].fX = (pts[0].fX + pts[3].fX * 2) / 3; |
| pts[2].fY = (pts[0].fY + pts[3].fY * 2) / 3; |
| break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| break; |
| case SkPath::kQuad_Verb: |
| case SkPath::kConic_Verb: |
| switch (v) { |
| case SkPath::kLine_Verb: |
| pts[1] = pts[2]; |
| break; |
| case SkPath::kConic_Verb: |
| weight = w; |
| case SkPath::kQuad_Verb: |
| break; |
| case SkPath::kCubic_Verb: { |
| SkDQuad dQuad; |
| dQuad.set(pts); |
| SkDCubic dCubic = dQuad.debugToCubic(); |
| pts[3] = pts[2]; |
| pts[1] = dCubic[1].asSkPoint(); |
| pts[2] = dCubic[2].asSkPoint(); |
| } break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| break; |
| case SkPath::kCubic_Verb: |
| switch (v) { |
| case SkPath::kLine_Verb: |
| pts[1] = pts[3]; |
| break; |
| case SkPath::kConic_Verb: |
| weight = w; |
| case SkPath::kQuad_Verb: { |
| SkDCubic dCubic; |
| dCubic.set(pts); |
| SkDQuad dQuad = dCubic.toQuad(); |
| pts[1] = dQuad[1].asSkPoint(); |
| pts[2] = pts[3]; |
| } break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| verb = v; |
| } |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| result.moveTo(pts[0]); |
| break; |
| case SkPath::kLine_Verb: |
| result.lineTo(pts[1]); |
| break; |
| case SkPath::kQuad_Verb: |
| result.quadTo(pts[1], pts[2]); |
| break; |
| case SkPath::kConic_Verb: |
| result.conicTo(pts[1], pts[2], weight); |
| break; |
| case SkPath::kCubic_Verb: |
| result.cubicTo(pts[1], pts[2], pts[3]); |
| break; |
| case SkPath::kClose_Verb: |
| result.close(); |
| break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| } |
| *path = result; |
| } |
| |
| static void add_to_map(SkScalar coverage, int x, int y, uint8_t* distanceMap, int w, int h) { |
| int byteCoverage = (int) (coverage * 256); |
| if (byteCoverage < 0) { |
| byteCoverage = 0; |
| } else if (byteCoverage > 255) { |
| byteCoverage = 255; |
| } |
| SkASSERT(x < w); |
| SkASSERT(y < h); |
| distanceMap[y * w + x] = SkTMax(distanceMap[y * w + x], (uint8_t) byteCoverage); |
| } |
| |
| static void filter_coverage(const uint8_t* map, int len, uint8_t min, uint8_t max, |
| uint8_t* filter) { |
| for (int index = 0; index < len; ++index) { |
| uint8_t in = map[index]; |
| filter[index] = in < min ? 0 : max < in ? 0 : in; |
| } |
| } |
| |
| static void construct_path(SkPath& path) { |
| path.reset(); |
| path.moveTo(442, 101.5f); |
| path.quadTo(413.5f, 691, 772, 514); |
| path.lineTo(346, 721.5f); |
| path.lineTo(154, 209); |
| path.lineTo(442, 101.5f); |
| path.close(); |
| } |
| |
| struct ButtonPaints { |
| static const int kMaxStateCount = 3; |
| SkPaint fDisabled; |
| SkPaint fStates[kMaxStateCount]; |
| SkPaint fLabel; |
| |
| ButtonPaints() { |
| fStates[0].setAntiAlias(true); |
| fStates[0].setStyle(SkPaint::kStroke_Style); |
| fStates[0].setColor(0xFF3F0000); |
| fStates[1] = fStates[0]; |
| fStates[1].setStrokeWidth(3); |
| fStates[2] = fStates[1]; |
| fStates[2].setColor(0xFFcf0000); |
| fLabel.setAntiAlias(true); |
| fLabel.setTextSize(25.0f); |
| fLabel.setTextAlign(SkPaint::kCenter_Align); |
| fLabel.setStyle(SkPaint::kFill_Style); |
| } |
| }; |
| |
| struct Button { |
| SkRect fBounds; |
| int fStateCount; |
| int fState; |
| char fLabel; |
| bool fVisible; |
| |
| Button(char label) { |
| fStateCount = 2; |
| fState = 0; |
| fLabel = label; |
| fVisible = false; |
| } |
| |
| Button(char label, int stateCount) { |
| SkASSERT(stateCount <= ButtonPaints::kMaxStateCount); |
| fStateCount = stateCount; |
| fState = 0; |
| fLabel = label; |
| fVisible = false; |
| } |
| |
| bool contains(const SkRect& rect) { |
| return fVisible && fBounds.contains(rect); |
| } |
| |
| bool enabled() { |
| return SkToBool(fState); |
| } |
| |
| void draw(SkCanvas* canvas, const ButtonPaints& paints) { |
| if (!fVisible) { |
| return; |
| } |
| canvas->drawRect(fBounds, paints.fStates[fState]); |
| canvas->drawText(&fLabel, 1, fBounds.centerX(), fBounds.fBottom - 5, paints.fLabel); |
| } |
| |
| void toggle() { |
| if (++fState == fStateCount) { |
| fState = 0; |
| } |
| } |
| |
| void setEnabled(bool enabled) { |
| fState = (int) enabled; |
| } |
| }; |
| |
| struct ControlPaints { |
| SkPaint fOutline; |
| SkPaint fIndicator; |
| SkPaint fFill; |
| SkPaint fLabel; |
| SkPaint fValue; |
| |
| ControlPaints() { |
| fOutline.setAntiAlias(true); |
| fOutline.setStyle(SkPaint::kStroke_Style); |
| fIndicator = fOutline; |
| fIndicator.setColor(SK_ColorRED); |
| fFill.setAntiAlias(true); |
| fFill.setColor(0x7fff0000); |
| fLabel.setAntiAlias(true); |
| fLabel.setTextSize(13.0f); |
| fValue.setAntiAlias(true); |
| fValue.setTextSize(11.0f); |
| } |
| }; |
| |
| struct UniControl { |
| SkString fName; |
| SkRect fBounds; |
| SkScalar fMin; |
| SkScalar fMax; |
| SkScalar fValLo; |
| SkScalar fYLo; |
| bool fVisible; |
| |
| UniControl(const char* name, SkScalar min, SkScalar max) { |
| fName = name; |
| fValLo = fMin = min; |
| fMax = max; |
| fVisible = false; |
| |
| } |
| |
| virtual ~UniControl() {} |
| |
| bool contains(const SkRect& rect) { |
| return fVisible && fBounds.contains(rect); |
| } |
| |
| virtual void draw(SkCanvas* canvas, const ControlPaints& paints) { |
| if (!fVisible) { |
| return; |
| } |
| canvas->drawRect(fBounds, paints.fOutline); |
| fYLo = fBounds.fTop + (fValLo - fMin) * fBounds.height() / (fMax - fMin); |
| canvas->drawLine(fBounds.fLeft - 5, fYLo, fBounds.fRight + 5, fYLo, paints.fIndicator); |
| SkString label; |
| label.printf("%0.3g", fValLo); |
| canvas->drawString(label, fBounds.fLeft + 5, fYLo - 5, paints.fValue); |
| canvas->drawString(fName, fBounds.fLeft, fBounds.bottom() + 11, |
| paints.fLabel); |
| } |
| }; |
| |
| struct BiControl : public UniControl { |
| SkScalar fValHi; |
| |
| BiControl(const char* name, SkScalar min, SkScalar max) |
| : UniControl(name, min, max) |
| , fValHi(fMax) { |
| } |
| |
| virtual ~BiControl() {} |
| |
| virtual void draw(SkCanvas* canvas, const ControlPaints& paints) { |
| UniControl::draw(canvas, paints); |
| if (!fVisible || fValHi == fValLo) { |
| return; |
| } |
| SkScalar yPos = fBounds.fTop + (fValHi - fMin) * fBounds.height() / (fMax - fMin); |
| canvas->drawLine(fBounds.fLeft - 5, yPos, fBounds.fRight + 5, yPos, paints.fIndicator); |
| SkString label; |
| label.printf("%0.3g", fValHi); |
| if (yPos < fYLo + 10) { |
| yPos = fYLo + 10; |
| } |
| canvas->drawString(label, fBounds.fLeft + 5, yPos - 5, paints.fValue); |
| SkRect fill = { fBounds.fLeft, fYLo, fBounds.fRight, yPos }; |
| canvas->drawRect(fill, paints.fFill); |
| } |
| }; |
| |
| |
| class MyClick : public SampleView::Click { |
| public: |
| enum ClickType { |
| kInvalidType = -1, |
| kPtType, |
| kVerbType, |
| kControlType, |
| kPathType, |
| } fType; |
| |
| enum ControlType { |
| kInvalidControl = -1, |
| kFirstControl, |
| kFilterControl = kFirstControl, |
| kResControl, |
| kWeightControl, |
| kWidthControl, |
| kLastControl = kWidthControl, |
| kFirstButton, |
| kCubicButton = kFirstButton, |
| kConicButton, |
| kQuadButton, |
| kLineButton, |
| kLastVerbButton = kLineButton, |
| kAddButton, |
| kDeleteButton, |
| kInOutButton, |
| kFillButton, |
| kSkeletonButton, |
| kFilterButton, |
| kBisectButton, |
| kJoinButton, |
| kLastButton = kJoinButton, |
| kPathMove, |
| } fControl; |
| |
| SkPath::Verb fVerb; |
| SkScalar fWeight; |
| |
| MyClick(SkView* target, ClickType type, ControlType control) |
| : Click(target) |
| , fType(type) |
| , fControl(control) |
| , fVerb((SkPath::Verb) -1) |
| , fWeight(1) { |
| } |
| |
| MyClick(SkView* target, ClickType type, int index) |
| : Click(target) |
| , fType(type) |
| , fControl((ControlType) index) |
| , fVerb((SkPath::Verb) -1) |
| , fWeight(1) { |
| } |
| |
| MyClick(SkView* target, ClickType type, int index, SkPath::Verb verb, SkScalar weight) |
| : Click(target) |
| , fType(type) |
| , fControl((ControlType) index) |
| , fVerb(verb) |
| , fWeight(weight) { |
| } |
| |
| bool isButton() { |
| return kFirstButton <= fControl && fControl <= kLastButton; |
| } |
| |
| int ptHit() const { |
| SkASSERT(fType == kPtType); |
| return (int) fControl; |
| } |
| |
| int verbHit() const { |
| SkASSERT(fType == kVerbType); |
| return (int) fControl; |
| } |
| }; |
| |
| enum { |
| kControlCount = MyClick::kLastControl - MyClick::kFirstControl + 1, |
| }; |
| |
| static struct ControlPair { |
| UniControl* fControl; |
| MyClick::ControlType fControlType; |
| } kControlList[kControlCount]; |
| |
| enum { |
| kButtonCount = MyClick::kLastButton - MyClick::kFirstButton + 1, |
| kVerbCount = MyClick::kLastVerbButton - MyClick::kFirstButton + 1, |
| }; |
| |
| static struct ButtonPair { |
| Button* fButton; |
| MyClick::ControlType fButtonType; |
| } kButtonList[kButtonCount]; |
| |
| static void enable_verb_button(MyClick::ControlType type) { |
| for (int index = 0; index < kButtonCount; ++index) { |
| MyClick::ControlType testType = kButtonList[index].fButtonType; |
| if (MyClick::kFirstButton <= testType && testType <= MyClick::kLastVerbButton) { |
| Button* button = kButtonList[index].fButton; |
| button->setEnabled(testType == type); |
| } |
| } |
| } |
| |
| struct Stroke; |
| |
| struct Active { |
| Active* fNext; |
| Stroke* fParent; |
| SkScalar fStart; |
| SkScalar fEnd; |
| |
| void reset() { |
| fNext = nullptr; |
| fStart = 0; |
| fEnd = 1; |
| } |
| }; |
| |
| struct Stroke { |
| SkPath fPath; |
| Active fActive; |
| bool fInner; |
| |
| void reset() { |
| fPath.reset(); |
| fActive.reset(); |
| } |
| }; |
| |
| struct PathUndo { |
| SkPath fPath; |
| PathUndo* fNext; |
| }; |
| |
| class AAGeometryView : public SampleView { |
| SkPaint fActivePaint; |
| SkPaint fComplexPaint; |
| SkPaint fCoveragePaint; |
| SkPaint fLegendLeftPaint; |
| SkPaint fLegendRightPaint; |
| SkPaint fPointPaint; |
| SkPaint fSkeletonPaint; |
| SkPaint fLightSkeletonPaint; |
| SkPath fPath; |
| ControlPaints fControlPaints; |
| UniControl fResControl; |
| UniControl fWeightControl; |
| UniControl fWidthControl; |
| BiControl fFilterControl; |
| ButtonPaints fButtonPaints; |
| Button fCubicButton; |
| Button fConicButton; |
| Button fQuadButton; |
| Button fLineButton; |
| Button fAddButton; |
| Button fDeleteButton; |
| Button fFillButton; |
| Button fSkeletonButton; |
| Button fFilterButton; |
| Button fBisectButton; |
| Button fJoinButton; |
| Button fInOutButton; |
| SkTArray<Stroke> fStrokes; |
| PathUndo* fUndo; |
| int fActivePt; |
| int fActiveVerb; |
| bool fHandlePathMove; |
| bool fShowLegend; |
| bool fHideAll; |
| const int kHitToleranace = 25; |
| |
| public: |
| |
| AAGeometryView() |
| : fResControl("error", 0, 10) |
| , fWeightControl("weight", 0, 5) |
| , fWidthControl("width", FLT_EPSILON, 100) |
| , fFilterControl("filter", 0, 255) |
| , fCubicButton('C') |
| , fConicButton('K') |
| , fQuadButton('Q') |
| , fLineButton('L') |
| , fAddButton('+') |
| , fDeleteButton('x') |
| , fFillButton('p') |
| , fSkeletonButton('s') |
| , fFilterButton('f', 3) |
| , fBisectButton('b') |
| , fJoinButton('j') |
| , fInOutButton('|') |
| , fUndo(nullptr) |
| , fActivePt(-1) |
| , fActiveVerb(-1) |
| , fHandlePathMove(true) |
| , fShowLegend(false) |
| , fHideAll(false) |
| { |
| fCoveragePaint.setAntiAlias(true); |
| fCoveragePaint.setColor(SK_ColorBLUE); |
| SkPaint strokePaint; |
| strokePaint.setAntiAlias(true); |
| strokePaint.setStyle(SkPaint::kStroke_Style); |
| fPointPaint = strokePaint; |
| fPointPaint.setColor(0x99ee3300); |
| fSkeletonPaint = strokePaint; |
| fSkeletonPaint.setColor(SK_ColorRED); |
| fLightSkeletonPaint = fSkeletonPaint; |
| fLightSkeletonPaint.setColor(0xFFFF7f7f); |
| fActivePaint = strokePaint; |
| fActivePaint.setColor(0x99ee3300); |
| fActivePaint.setStrokeWidth(5); |
| fComplexPaint = fActivePaint; |
| fComplexPaint.setColor(SK_ColorBLUE); |
| fLegendLeftPaint.setAntiAlias(true); |
| fLegendLeftPaint.setTextSize(13); |
| fLegendRightPaint = fLegendLeftPaint; |
| fLegendRightPaint.setTextAlign(SkPaint::kRight_Align); |
| construct_path(fPath); |
| fFillButton.fVisible = fSkeletonButton.fVisible = fFilterButton.fVisible |
| = fBisectButton.fVisible = fJoinButton.fVisible = fInOutButton.fVisible = true; |
| fSkeletonButton.setEnabled(true); |
| fInOutButton.setEnabled(true); |
| fJoinButton.setEnabled(true); |
| fFilterControl.fValLo = 120; |
| fFilterControl.fValHi = 141; |
| fFilterControl.fVisible = fFilterButton.fState == 2; |
| fResControl.fValLo = 5; |
| fResControl.fVisible = true; |
| fWidthControl.fValLo = 50; |
| fWidthControl.fVisible = true; |
| init_controlList(); |
| init_buttonList(); |
| } |
| |
| bool constructPath() { |
| construct_path(fPath); |
| return true; |
| } |
| |
| void savePath(Click::State state) { |
| if (state != Click::kDown_State) { |
| return; |
| } |
| if (fUndo && fUndo->fPath == fPath) { |
| return; |
| } |
| PathUndo* undo = new PathUndo; |
| undo->fPath = fPath; |
| undo->fNext = fUndo; |
| fUndo = undo; |
| } |
| |
| bool undo() { |
| if (!fUndo) { |
| return false; |
| } |
| fPath = fUndo->fPath; |
| validatePath(); |
| PathUndo* next = fUndo->fNext; |
| delete fUndo; |
| fUndo = next; |
| return true; |
| } |
| |
| void validatePath() { |
| PathUndo* undo = fUndo; |
| int match = 0; |
| while (undo) { |
| match += fPath == undo->fPath; |
| undo = undo->fNext; |
| } |
| } |
| |
| void set_controlList(int index, UniControl* control, MyClick::ControlType type) { |
| kControlList[index].fControl = control; |
| kControlList[index].fControlType = type; |
| } |
| |
| #define SET_CONTROL(Name) set_controlList(index++, &f##Name##Control, \ |
| MyClick::k##Name##Control) |
| |
| bool hideAll() { |
| fHideAll ^= true; |
| return true; |
| } |
| |
| void init_controlList() { |
| int index = 0; |
| SET_CONTROL(Width); |
| SET_CONTROL(Res); |
| SET_CONTROL(Filter); |
| SET_CONTROL(Weight); |
| } |
| |
| #undef SET_CONTROL |
| |
| void set_buttonList(int index, Button* button, MyClick::ControlType type) { |
| kButtonList[index].fButton = button; |
| kButtonList[index].fButtonType = type; |
| } |
| |
| #define SET_BUTTON(Name) set_buttonList(index++, &f##Name##Button, \ |
| MyClick::k##Name##Button) |
| |
| void init_buttonList() { |
| int index = 0; |
| SET_BUTTON(Fill); |
| SET_BUTTON(Skeleton); |
| SET_BUTTON(Filter); |
| SET_BUTTON(Bisect); |
| SET_BUTTON(Join); |
| SET_BUTTON(InOut); |
| SET_BUTTON(Cubic); |
| SET_BUTTON(Conic); |
| SET_BUTTON(Quad); |
| SET_BUTTON(Line); |
| SET_BUTTON(Add); |
| SET_BUTTON(Delete); |
| } |
| |
| #undef SET_BUTTON |
| |
| // overrides from SkEventSink |
| bool onQuery(SkEvent* evt) override; |
| |
| void onSizeChange() override { |
| setControlButtonsPos(); |
| this->INHERITED::onSizeChange(); |
| } |
| |
| bool pathDump() { |
| fPath.dump(); |
| return true; |
| } |
| |
| bool scaleDown() { |
| SkMatrix matrix; |
| SkRect bounds = fPath.getBounds(); |
| matrix.setScale(1.f / 1.5f, 1.f / 1.5f, bounds.centerX(), bounds.centerY()); |
| fPath.transform(matrix); |
| validatePath(); |
| return true; |
| } |
| |
| bool scaleToFit() { |
| SkMatrix matrix; |
| SkRect bounds = fPath.getBounds(); |
| SkScalar scale = SkTMin(this->width() / bounds.width(), this->height() / bounds.height()) |
| * 0.8f; |
| matrix.setScale(scale, scale, bounds.centerX(), bounds.centerY()); |
| fPath.transform(matrix); |
| bounds = fPath.getBounds(); |
| SkScalar offsetX = (this->width() - bounds.width()) / 2 - bounds.fLeft; |
| SkScalar offsetY = (this->height() - bounds.height()) / 2 - bounds.fTop; |
| fPath.offset(offsetX, offsetY); |
| validatePath(); |
| return true; |
| } |
| |
| bool scaleUp() { |
| SkMatrix matrix; |
| SkRect bounds = fPath.getBounds(); |
| matrix.setScale(1.5f, 1.5f, bounds.centerX(), bounds.centerY()); |
| fPath.transform(matrix); |
| validatePath(); |
| return true; |
| } |
| |
| void setControlButtonsPos() { |
| SkScalar widthOffset = this->width() - 100; |
| for (int index = 0; index < kControlCount; ++index) { |
| if (kControlList[index].fControl->fVisible) { |
| kControlList[index].fControl->fBounds.setXYWH(widthOffset, 30, 30, 400); |
| widthOffset -= 50; |
| } |
| } |
| SkScalar buttonOffset = 0; |
| for (int index = 0; index < kButtonCount; ++index) { |
| kButtonList[index].fButton->fBounds.setXYWH(this->width() - 50, |
| buttonOffset += 50, 30, 30); |
| } |
| } |
| |
| bool showLegend() { |
| fShowLegend ^= true; |
| return true; |
| } |
| |
| void draw_bisect(SkCanvas* canvas, const SkVector& lastVector, const SkVector& vector, |
| const SkPoint& pt) { |
| SkVector lastV = lastVector; |
| SkScalar lastLen = lastVector.length(); |
| SkVector nextV = vector; |
| SkScalar nextLen = vector.length(); |
| if (lastLen < nextLen) { |
| lastV.setLength(nextLen); |
| } else { |
| nextV.setLength(lastLen); |
| } |
| |
| SkVector bisect = { (lastV.fX + nextV.fX) / 2, (lastV.fY + nextV.fY) / 2 }; |
| bisect.setLength(fWidthControl.fValLo * 2); |
| if (fBisectButton.enabled()) { |
| canvas->drawLine(pt, pt + bisect, fSkeletonPaint); |
| } |
| lastV.setLength(fWidthControl.fValLo); |
| if (fBisectButton.enabled()) { |
| canvas->drawLine(pt, {pt.fX - lastV.fY, pt.fY + lastV.fX}, fSkeletonPaint); |
| } |
| nextV.setLength(fWidthControl.fValLo); |
| if (fBisectButton.enabled()) { |
| canvas->drawLine(pt, {pt.fX + nextV.fY, pt.fY - nextV.fX}, fSkeletonPaint); |
| } |
| if (fJoinButton.enabled()) { |
| SkScalar r = fWidthControl.fValLo; |
| SkRect oval = { pt.fX - r, pt.fY - r, pt.fX + r, pt.fY + r}; |
| SkScalar startAngle = SkScalarATan2(lastV.fX, -lastV.fY) * 180.f / SK_ScalarPI; |
| SkScalar endAngle = SkScalarATan2(-nextV.fX, nextV.fY) * 180.f / SK_ScalarPI; |
| if (endAngle > startAngle) { |
| canvas->drawArc(oval, startAngle, endAngle - startAngle, false, fSkeletonPaint); |
| } else { |
| canvas->drawArc(oval, startAngle, 360 - (startAngle - endAngle), false, |
| fSkeletonPaint); |
| } |
| } |
| } |
| |
| void draw_bisects(SkCanvas* canvas, bool activeOnly) { |
| SkVector firstVector, lastVector, nextLast, vector; |
| SkPoint pts[4]; |
| SkPoint firstPt = { 0, 0 }; // init to avoid warning; |
| SkPath::Verb verb; |
| SkPath::Iter iter(fPath, true); |
| bool foundFirst = false; |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| ++counter; |
| if (activeOnly && counter != fActiveVerb && counter - 1 != fActiveVerb |
| && counter + 1 != fActiveVerb |
| && (fActiveVerb != 1 || counter != fPath.countVerbs())) { |
| continue; |
| } |
| switch (verb) { |
| case SkPath::kLine_Verb: |
| nextLast = pts[0] - pts[1]; |
| vector = pts[1] - pts[0]; |
| break; |
| case SkPath::kQuad_Verb: { |
| nextLast = pts[1] - pts[2]; |
| if (SkScalarNearlyZero(nextLast.length())) { |
| nextLast = pts[0] - pts[2]; |
| } |
| vector = pts[1] - pts[0]; |
| if (SkScalarNearlyZero(vector.length())) { |
| vector = pts[2] - pts[0]; |
| } |
| if (!fBisectButton.enabled()) { |
| break; |
| } |
| SkScalar t = SkFindQuadMaxCurvature(pts); |
| if (0 < t && t < 1) { |
| SkPoint maxPt = SkEvalQuadAt(pts, t); |
| SkVector tangent = SkEvalQuadTangentAt(pts, t); |
| tangent.setLength(fWidthControl.fValLo * 2); |
| canvas->drawLine(maxPt, {maxPt.fX + tangent.fY, maxPt.fY - tangent.fX}, |
| fSkeletonPaint); |
| } |
| } break; |
| case SkPath::kConic_Verb: |
| nextLast = pts[1] - pts[2]; |
| if (SkScalarNearlyZero(nextLast.length())) { |
| nextLast = pts[0] - pts[2]; |
| } |
| vector = pts[1] - pts[0]; |
| if (SkScalarNearlyZero(vector.length())) { |
| vector = pts[2] - pts[0]; |
| } |
| if (!fBisectButton.enabled()) { |
| break; |
| } |
| // FIXME : need max curvature or equivalent here |
| break; |
| case SkPath::kCubic_Verb: { |
| nextLast = pts[2] - pts[3]; |
| if (SkScalarNearlyZero(nextLast.length())) { |
| nextLast = pts[1] - pts[3]; |
| if (SkScalarNearlyZero(nextLast.length())) { |
| nextLast = pts[0] - pts[3]; |
| } |
| } |
| vector = pts[0] - pts[1]; |
| if (SkScalarNearlyZero(vector.length())) { |
| vector = pts[0] - pts[2]; |
| if (SkScalarNearlyZero(vector.length())) { |
| vector = pts[0] - pts[3]; |
| } |
| } |
| if (!fBisectButton.enabled()) { |
| break; |
| } |
| SkScalar tMax[2]; |
| int tMaxCount = SkFindCubicMaxCurvature(pts, tMax); |
| for (int tIndex = 0; tIndex < tMaxCount; ++tIndex) { |
| if (0 >= tMax[tIndex] || tMax[tIndex] >= 1) { |
| continue; |
| } |
| SkPoint maxPt; |
| SkVector tangent; |
| SkEvalCubicAt(pts, tMax[tIndex], &maxPt, &tangent, nullptr); |
| tangent.setLength(fWidthControl.fValLo * 2); |
| canvas->drawLine(maxPt, {maxPt.fX + tangent.fY, maxPt.fY - tangent.fX}, |
| fSkeletonPaint); |
| } |
| } break; |
| case SkPath::kClose_Verb: |
| if (foundFirst) { |
| draw_bisect(canvas, lastVector, firstVector, firstPt); |
| foundFirst = false; |
| } |
| break; |
| default: |
| break; |
| } |
| if (SkPath::kLine_Verb <= verb && verb <= SkPath::kCubic_Verb) { |
| if (!foundFirst) { |
| firstPt = pts[0]; |
| firstVector = vector; |
| foundFirst = true; |
| } else { |
| draw_bisect(canvas, lastVector, vector, pts[0]); |
| } |
| lastVector = nextLast; |
| } |
| } |
| } |
| |
| void draw_legend(SkCanvas* canvas); |
| |
| void draw_segment(SkCanvas* canvas) { |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(fPath, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| if (++counter < fActiveVerb) { |
| continue; |
| } |
| switch (verb) { |
| case SkPath::kLine_Verb: |
| canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts, fActivePaint); |
| draw_points(canvas, pts, 2); |
| break; |
| case SkPath::kQuad_Verb: { |
| SkPath qPath; |
| qPath.moveTo(pts[0]); |
| qPath.quadTo(pts[1], pts[2]); |
| canvas->drawPath(qPath, fActivePaint); |
| draw_points(canvas, pts, 3); |
| } break; |
| case SkPath::kConic_Verb: { |
| SkPath conicPath; |
| conicPath.moveTo(pts[0]); |
| conicPath.conicTo(pts[1], pts[2], iter.conicWeight()); |
| canvas->drawPath(conicPath, fActivePaint); |
| draw_points(canvas, pts, 3); |
| } break; |
| case SkPath::kCubic_Verb: { |
| SkScalar loopT[3]; |
| int complex = SkDCubic::ComplexBreak(pts, loopT); |
| SkPath cPath; |
| cPath.moveTo(pts[0]); |
| cPath.cubicTo(pts[1], pts[2], pts[3]); |
| canvas->drawPath(cPath, complex ? fComplexPaint : fActivePaint); |
| draw_points(canvas, pts, 4); |
| } break; |
| default: |
| break; |
| } |
| return; |
| } |
| } |
| |
| void draw_points(SkCanvas* canvas, SkPoint* points, int count) { |
| for (int index = 0; index < count; ++index) { |
| canvas->drawCircle(points[index].fX, points[index].fY, 10, fPointPaint); |
| } |
| } |
| |
| int hittest_verb(SkPoint pt, SkPath::Verb* verbPtr, SkScalar* weight) { |
| SkIntersections i; |
| SkDLine hHit = {{{pt.fX - kHitToleranace, pt.fY }, {pt.fX + kHitToleranace, pt.fY}}}; |
| SkDLine vHit = {{{pt.fX, pt.fY - kHitToleranace }, {pt.fX, pt.fY + kHitToleranace}}}; |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(fPath, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| ++counter; |
| switch (verb) { |
| case SkPath::kLine_Verb: { |
| SkDLine line; |
| line.set(pts); |
| if (i.intersect(line, hHit) || i.intersect(line, vHit)) { |
| *verbPtr = verb; |
| *weight = 1; |
| return counter; |
| } |
| } break; |
| case SkPath::kQuad_Verb: { |
| SkDQuad quad; |
| quad.set(pts); |
| if (i.intersect(quad, hHit) || i.intersect(quad, vHit)) { |
| *verbPtr = verb; |
| *weight = 1; |
| return counter; |
| } |
| } break; |
| case SkPath::kConic_Verb: { |
| SkDConic conic; |
| SkScalar w = iter.conicWeight(); |
| conic.set(pts, w); |
| if (i.intersect(conic, hHit) || i.intersect(conic, vHit)) { |
| *verbPtr = verb; |
| *weight = w; |
| return counter; |
| } |
| } break; |
| case SkPath::kCubic_Verb: { |
| SkDCubic cubic; |
| cubic.set(pts); |
| if (i.intersect(cubic, hHit) || i.intersect(cubic, vHit)) { |
| *verbPtr = verb; |
| *weight = 1; |
| return counter; |
| } |
| } break; |
| default: |
| break; |
| } |
| } |
| return -1; |
| } |
| |
| SkScalar pt_to_line(SkPoint s, SkPoint e, int x, int y) { |
| SkScalar radius = fWidthControl.fValLo; |
| SkVector adjOpp = e - s; |
| SkScalar lenSq = SkPointPriv::LengthSqd(adjOpp); |
| SkPoint rotated = { |
| (y - s.fY) * adjOpp.fY + (x - s.fX) * adjOpp.fX, |
| (y - s.fY) * adjOpp.fX - (x - s.fX) * adjOpp.fY, |
| }; |
| if (rotated.fX < 0 || rotated.fX > lenSq) { |
| return -radius; |
| } |
| rotated.fY /= SkScalarSqrt(lenSq); |
| return SkTMax(-radius, SkTMin(radius, rotated.fY)); |
| } |
| |
| // given a line, compute the interior and exterior gradient coverage |
| bool coverage(SkPoint s, SkPoint e, uint8_t* distanceMap, int w, int h) { |
| SkScalar radius = fWidthControl.fValLo; |
| int minX = SkTMax(0, (int) (SkTMin(s.fX, e.fX) - radius)); |
| int minY = SkTMax(0, (int) (SkTMin(s.fY, e.fY) - radius)); |
| int maxX = SkTMin(w, (int) (SkTMax(s.fX, e.fX) + radius) + 1); |
| int maxY = SkTMin(h, (int) (SkTMax(s.fY, e.fY) + radius) + 1); |
| for (int y = minY; y < maxY; ++y) { |
| for (int x = minX; x < maxX; ++x) { |
| SkScalar ptToLineDist = pt_to_line(s, e, x, y); |
| if (ptToLineDist > -radius && ptToLineDist < radius) { |
| SkScalar coverage = ptToLineDist / radius; |
| add_to_map(1 - SkScalarAbs(coverage), x, y, distanceMap, w, h); |
| } |
| SkVector ptToS = { x - s.fX, y - s.fY }; |
| SkScalar dist = ptToS.length(); |
| if (dist < radius) { |
| SkScalar coverage = dist / radius; |
| add_to_map(1 - SkScalarAbs(coverage), x, y, distanceMap, w, h); |
| } |
| SkVector ptToE = { x - e.fX, y - e.fY }; |
| dist = ptToE.length(); |
| if (dist < radius) { |
| SkScalar coverage = dist / radius; |
| add_to_map(1 - SkScalarAbs(coverage), x, y, distanceMap, w, h); |
| } |
| } |
| } |
| return true; |
| } |
| |
| void quad_coverage(SkPoint pts[3], uint8_t* distanceMap, int w, int h) { |
| SkScalar dist = pts[0].Distance(pts[0], pts[2]); |
| if (dist < gCurveDistance) { |
| (void) coverage(pts[0], pts[2], distanceMap, w, h); |
| return; |
| } |
| SkPoint split[5]; |
| SkChopQuadAt(pts, split, 0.5f); |
| quad_coverage(&split[0], distanceMap, w, h); |
| quad_coverage(&split[2], distanceMap, w, h); |
| } |
| |
| void conic_coverage(SkPoint pts[3], SkScalar weight, uint8_t* distanceMap, int w, int h) { |
| SkScalar dist = pts[0].Distance(pts[0], pts[2]); |
| if (dist < gCurveDistance) { |
| (void) coverage(pts[0], pts[2], distanceMap, w, h); |
| return; |
| } |
| SkConic split[2]; |
| SkConic conic; |
| conic.set(pts, weight); |
| if (conic.chopAt(0.5f, split)) { |
| conic_coverage(split[0].fPts, split[0].fW, distanceMap, w, h); |
| conic_coverage(split[1].fPts, split[1].fW, distanceMap, w, h); |
| } |
| } |
| |
| void cubic_coverage(SkPoint pts[4], uint8_t* distanceMap, int w, int h) { |
| SkScalar dist = pts[0].Distance(pts[0], pts[3]); |
| if (dist < gCurveDistance) { |
| (void) coverage(pts[0], pts[3], distanceMap, w, h); |
| return; |
| } |
| SkPoint split[7]; |
| SkChopCubicAt(pts, split, 0.5f); |
| cubic_coverage(&split[0], distanceMap, w, h); |
| cubic_coverage(&split[3], distanceMap, w, h); |
| } |
| |
| void path_coverage(const SkPath& path, uint8_t* distanceMap, int w, int h) { |
| memset(distanceMap, 0, sizeof(distanceMap[0]) * w * h); |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| SkPath::Iter iter(path, true); |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| switch (verb) { |
| case SkPath::kLine_Verb: |
| (void) coverage(pts[0], pts[1], distanceMap, w, h); |
| break; |
| case SkPath::kQuad_Verb: |
| quad_coverage(pts, distanceMap, w, h); |
| break; |
| case SkPath::kConic_Verb: |
| conic_coverage(pts, iter.conicWeight(), distanceMap, w, h); |
| break; |
| case SkPath::kCubic_Verb: |
| cubic_coverage(pts, distanceMap, w, h); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| static uint8_t* set_up_dist_map(const SkImageInfo& imageInfo, SkBitmap* distMap) { |
| distMap->setInfo(imageInfo); |
| distMap->setIsVolatile(true); |
| SkAssertResult(distMap->tryAllocPixels()); |
| SkASSERT((int) distMap->rowBytes() == imageInfo.width()); |
| return distMap->getAddr8(0, 0); |
| } |
| |
| void path_stroke(int index, SkPath* inner, SkPath* outer) { |
| #if 0 |
| SkPathStroker stroker(fPath, fWidthControl.fValLo, 0, |
| SkPaint::kRound_Cap, SkPaint::kRound_Join, fResControl.fValLo); |
| SkPoint pts[4], firstPt, lastPt; |
| SkPath::Verb verb; |
| SkPath::Iter iter(fPath, true); |
| int counter = -1; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| ++counter; |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| firstPt = pts[0]; |
| break; |
| case SkPath::kLine_Verb: |
| if (counter == index) { |
| stroker.moveTo(pts[0]); |
| stroker.lineTo(pts[1]); |
| goto done; |
| } |
| lastPt = pts[1]; |
| break; |
| case SkPath::kQuad_Verb: |
| if (counter == index) { |
| stroker.moveTo(pts[0]); |
| stroker.quadTo(pts[1], pts[2]); |
| goto done; |
| } |
| lastPt = pts[2]; |
| break; |
| case SkPath::kConic_Verb: |
| if (counter == index) { |
| stroker.moveTo(pts[0]); |
| stroker.conicTo(pts[1], pts[2], iter.conicWeight()); |
| goto done; |
| } |
| lastPt = pts[2]; |
| break; |
| case SkPath::kCubic_Verb: |
| if (counter == index) { |
| stroker.moveTo(pts[0]); |
| stroker.cubicTo(pts[1], pts[2], pts[3]); |
| goto done; |
| } |
| lastPt = pts[3]; |
| break; |
| case SkPath::kClose_Verb: |
| if (counter == index) { |
| stroker.moveTo(lastPt); |
| stroker.lineTo(firstPt); |
| goto done; |
| } |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| done: |
| *inner = stroker.fInner; |
| *outer = stroker.fOuter; |
| #endif |
| } |
| |
| void draw_stroke(SkCanvas* canvas, int active) { |
| SkPath inner, outer; |
| path_stroke(active, &inner, &outer); |
| canvas->drawPath(inner, fSkeletonPaint); |
| canvas->drawPath(outer, fSkeletonPaint); |
| } |
| |
| void gather_strokes() { |
| fStrokes.reset(); |
| for (int index = 0; index < fPath.countVerbs(); ++index) { |
| Stroke& inner = fStrokes.push_back(); |
| inner.reset(); |
| inner.fInner = true; |
| Stroke& outer = fStrokes.push_back(); |
| outer.reset(); |
| outer.fInner = false; |
| path_stroke(index, &inner.fPath, &outer.fPath); |
| } |
| } |
| |
| void trim_strokes() { |
| // eliminate self-itersecting loops |
| // trim outside edges |
| gather_strokes(); |
| for (int index = 0; index < fStrokes.count(); ++index) { |
| SkPath& outPath = fStrokes[index].fPath; |
| for (int inner = 0; inner < fStrokes.count(); ++inner) { |
| if (index == inner) { |
| continue; |
| } |
| SkPath& inPath = fStrokes[inner].fPath; |
| if (!outPath.getBounds().intersects(inPath.getBounds())) { |
| continue; |
| } |
| |
| } |
| } |
| } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| #if 0 |
| SkDEBUGCODE(SkDebugStrokeGlobals debugGlobals); |
| SkOpAA aaResult(fPath, fWidthControl.fValLo, fResControl.fValLo |
| SkDEBUGPARAMS(&debugGlobals)); |
| #endif |
| SkPath strokePath; |
| // aaResult.simplify(&strokePath); |
| canvas->drawPath(strokePath, fSkeletonPaint); |
| SkRect bounds = fPath.getBounds(); |
| SkScalar radius = fWidthControl.fValLo; |
| int w = (int) (bounds.fRight + radius + 1); |
| int h = (int) (bounds.fBottom + radius + 1); |
| SkImageInfo imageInfo = SkImageInfo::MakeA8(w, h); |
| SkBitmap distMap; |
| uint8_t* distanceMap = set_up_dist_map(imageInfo, &distMap); |
| path_coverage(fPath, distanceMap, w, h); |
| if (fFillButton.enabled()) { |
| canvas->drawPath(fPath, fCoveragePaint); |
| } |
| if (fFilterButton.fState == 2 |
| && (0 < fFilterControl.fValLo || fFilterControl.fValHi < 255)) { |
| SkBitmap filteredMap; |
| uint8_t* filtered = set_up_dist_map(imageInfo, &filteredMap); |
| filter_coverage(distanceMap, sizeof(uint8_t) * w * h, (uint8_t) fFilterControl.fValLo, |
| (uint8_t) fFilterControl.fValHi, filtered); |
| canvas->drawBitmap(filteredMap, 0, 0, &fCoveragePaint); |
| } else if (fFilterButton.enabled()) { |
| canvas->drawBitmap(distMap, 0, 0, &fCoveragePaint); |
| } |
| if (fSkeletonButton.enabled()) { |
| canvas->drawPath(fPath, fActiveVerb >= 0 ? fLightSkeletonPaint : fSkeletonPaint); |
| } |
| if (fActiveVerb >= 0) { |
| draw_segment(canvas); |
| } |
| if (fBisectButton.enabled() || fJoinButton.enabled()) { |
| draw_bisects(canvas, fActiveVerb >= 0); |
| } |
| if (fInOutButton.enabled()) { |
| if (fActiveVerb >= 0) { |
| draw_stroke(canvas, fActiveVerb); |
| } else { |
| for (int index = 0; index < fPath.countVerbs(); ++index) { |
| draw_stroke(canvas, index); |
| } |
| } |
| } |
| if (fHideAll) { |
| return; |
| } |
| for (int index = 0; index < kControlCount; ++index) { |
| kControlList[index].fControl->draw(canvas, fControlPaints); |
| } |
| for (int index = 0; index < kButtonCount; ++index) { |
| kButtonList[index].fButton->draw(canvas, fButtonPaints); |
| } |
| if (fShowLegend) { |
| draw_legend(canvas); |
| } |
| |
| #if 0 |
| SkPaint paint; |
| paint.setARGB(255, 34, 31, 31); |
| paint.setAntiAlias(true); |
| |
| SkPath path; |
| path.moveTo(18,439); |
| path.lineTo(414,439); |
| path.lineTo(414,702); |
| path.lineTo(18,702); |
| path.lineTo(18,439); |
| |
| path.moveTo(19,701); |
| path.lineTo(413,701); |
| path.lineTo(413,440); |
| path.lineTo(19,440); |
| path.lineTo(19,701); |
| path.close(); |
| canvas->drawPath(path, paint); |
| |
| canvas->scale(1.0f, -1.0f); |
| canvas->translate(0.0f, -800.0f); |
| canvas->drawPath(path, paint); |
| #endif |
| |
| } |
| |
| int hittest_pt(SkPoint pt) { |
| for (int index = 0; index < fPath.countPoints(); ++index) { |
| if (SkPoint::Distance(fPath.getPoint(index), pt) <= kHitToleranace * 2) { |
| return index; |
| } |
| } |
| return -1; |
| } |
| |
| virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override { |
| SkPoint pt = {x, y}; |
| int ptHit = hittest_pt(pt); |
| if (ptHit >= 0) { |
| return new MyClick(this, MyClick::kPtType, ptHit); |
| } |
| SkPath::Verb verb; |
| SkScalar weight; |
| int verbHit = hittest_verb(pt, &verb, &weight); |
| if (verbHit >= 0) { |
| return new MyClick(this, MyClick::kVerbType, verbHit, verb, weight); |
| } |
| if (!fHideAll) { |
| const SkRect& rectPt = SkRect::MakeXYWH(x, y, 1, 1); |
| for (int index = 0; index < kControlCount; ++index) { |
| if (kControlList[index].fControl->contains(rectPt)) { |
| return new MyClick(this, MyClick::kControlType, |
| kControlList[index].fControlType); |
| } |
| } |
| for (int index = 0; index < kButtonCount; ++index) { |
| if (kButtonList[index].fButton->contains(rectPt)) { |
| return new MyClick(this, MyClick::kControlType, kButtonList[index].fButtonType); |
| } |
| } |
| } |
| fLineButton.fVisible = fQuadButton.fVisible = fConicButton.fVisible |
| = fCubicButton.fVisible = fWeightControl.fVisible = fAddButton.fVisible |
| = fDeleteButton.fVisible = false; |
| fActiveVerb = -1; |
| fActivePt = -1; |
| if (fHandlePathMove) { |
| return new MyClick(this, MyClick::kPathType, MyClick::kPathMove); |
| } |
| return this->INHERITED::onFindClickHandler(x, y, modi); |
| } |
| |
| static SkScalar MapScreenYtoValue(int y, const UniControl& control) { |
| return SkTMin(1.f, SkTMax(0.f, |
| SkIntToScalar(y) - control.fBounds.fTop) / control.fBounds.height()) |
| * (control.fMax - control.fMin) + control.fMin; |
| } |
| |
| bool onClick(Click* click) override { |
| MyClick* myClick = (MyClick*) click; |
| switch (myClick->fType) { |
| case MyClick::kPtType: { |
| savePath(click->fState); |
| fActivePt = myClick->ptHit(); |
| SkPoint pt = fPath.getPoint((int) myClick->fControl); |
| pt.offset(SkIntToScalar(click->fICurr.fX - click->fIPrev.fX), |
| SkIntToScalar(click->fICurr.fY - click->fIPrev.fY)); |
| set_path_pt(fActivePt, pt, &fPath); |
| validatePath(); |
| return true; |
| } |
| case MyClick::kPathType: |
| savePath(click->fState); |
| fPath.offset(SkIntToScalar(click->fICurr.fX - click->fIPrev.fX), |
| SkIntToScalar(click->fICurr.fY - click->fIPrev.fY)); |
| validatePath(); |
| return true; |
| case MyClick::kVerbType: { |
| fActiveVerb = myClick->verbHit(); |
| fLineButton.fVisible = fQuadButton.fVisible = fConicButton.fVisible |
| = fCubicButton.fVisible = fAddButton.fVisible = fDeleteButton.fVisible |
| = true; |
| fLineButton.setEnabled(myClick->fVerb == SkPath::kLine_Verb); |
| fQuadButton.setEnabled(myClick->fVerb == SkPath::kQuad_Verb); |
| fConicButton.setEnabled(myClick->fVerb == SkPath::kConic_Verb); |
| fCubicButton.setEnabled(myClick->fVerb == SkPath::kCubic_Verb); |
| fWeightControl.fValLo = myClick->fWeight; |
| fWeightControl.fVisible = myClick->fVerb == SkPath::kConic_Verb; |
| } break; |
| case MyClick::kControlType: { |
| if (click->fState != Click::kDown_State && myClick->isButton()) { |
| return true; |
| } |
| switch (myClick->fControl) { |
| case MyClick::kFilterControl: { |
| SkScalar val = MapScreenYtoValue(click->fICurr.fY, fFilterControl); |
| if (val - fFilterControl.fValLo < fFilterControl.fValHi - val) { |
| fFilterControl.fValLo = SkTMax(0.f, val); |
| } else { |
| fFilterControl.fValHi = SkTMin(255.f, val); |
| } |
| } break; |
| case MyClick::kResControl: |
| fResControl.fValLo = MapScreenYtoValue(click->fICurr.fY, fResControl); |
| break; |
| case MyClick::kWeightControl: { |
| savePath(click->fState); |
| SkScalar w = MapScreenYtoValue(click->fICurr.fY, fWeightControl); |
| set_path_weight(fActiveVerb, w, &fPath); |
| validatePath(); |
| fWeightControl.fValLo = w; |
| } break; |
| case MyClick::kWidthControl: |
| fWidthControl.fValLo = MapScreenYtoValue(click->fICurr.fY, fWidthControl); |
| break; |
| case MyClick::kLineButton: |
| savePath(click->fState); |
| enable_verb_button(myClick->fControl); |
| fWeightControl.fVisible = false; |
| set_path_verb(fActiveVerb, SkPath::kLine_Verb, &fPath, 1); |
| validatePath(); |
| break; |
| case MyClick::kQuadButton: |
| savePath(click->fState); |
| enable_verb_button(myClick->fControl); |
| fWeightControl.fVisible = false; |
| set_path_verb(fActiveVerb, SkPath::kQuad_Verb, &fPath, 1); |
| validatePath(); |
| break; |
| case MyClick::kConicButton: { |
| savePath(click->fState); |
| enable_verb_button(myClick->fControl); |
| fWeightControl.fVisible = true; |
| const SkScalar defaultConicWeight = 1.f / SkScalarSqrt(2); |
| set_path_verb(fActiveVerb, SkPath::kConic_Verb, &fPath, defaultConicWeight); |
| validatePath(); |
| fWeightControl.fValLo = get_path_weight(fActiveVerb, fPath); |
| } break; |
| case MyClick::kCubicButton: |
| savePath(click->fState); |
| enable_verb_button(myClick->fControl); |
| fWeightControl.fVisible = false; |
| set_path_verb(fActiveVerb, SkPath::kCubic_Verb, &fPath, 1); |
| validatePath(); |
| break; |
| case MyClick::kAddButton: |
| savePath(click->fState); |
| add_path_segment(fActiveVerb, &fPath); |
| validatePath(); |
| if (fWeightControl.fVisible) { |
| fWeightControl.fValLo = get_path_weight(fActiveVerb, fPath); |
| } |
| break; |
| case MyClick::kDeleteButton: |
| savePath(click->fState); |
| delete_path_segment(fActiveVerb, &fPath); |
| validatePath(); |
| break; |
| case MyClick::kFillButton: |
| fFillButton.toggle(); |
| break; |
| case MyClick::kSkeletonButton: |
| fSkeletonButton.toggle(); |
| break; |
| case MyClick::kFilterButton: |
| fFilterButton.toggle(); |
| fFilterControl.fVisible = fFilterButton.fState == 2; |
| break; |
| case MyClick::kBisectButton: |
| fBisectButton.toggle(); |
| break; |
| case MyClick::kJoinButton: |
| fJoinButton.toggle(); |
| break; |
| case MyClick::kInOutButton: |
| fInOutButton.toggle(); |
| break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| } break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| setControlButtonsPos(); |
| return true; |
| } |
| |
| private: |
| typedef SampleView INHERITED; |
| }; |
| |
| static struct KeyCommand { |
| char fKey; |
| char fAlternate; |
| const char* fDescriptionL; |
| const char* fDescriptionR; |
| bool (AAGeometryView::*fFunction)(); |
| } kKeyCommandList[] = { |
| { ' ', 0, "space", "center path", &AAGeometryView::scaleToFit }, |
| { '-', 0, "-", "zoom out", &AAGeometryView::scaleDown }, |
| { '+', '=', "+/=", "zoom in", &AAGeometryView::scaleUp }, |
| { 'D', 0, "D", "dump to console", &AAGeometryView::pathDump }, |
| { 'H', 0, "H", "hide controls", &AAGeometryView::hideAll }, |
| { 'R', 0, "R", "reset path", &AAGeometryView::constructPath }, |
| { 'Z', 0, "Z", "undo", &AAGeometryView::undo }, |
| { '?', 0, "?", "show legend", &AAGeometryView::showLegend }, |
| }; |
| |
| const int kKeyCommandCount = (int) SK_ARRAY_COUNT(kKeyCommandList); |
| |
| void AAGeometryView::draw_legend(SkCanvas* canvas) { |
| SkScalar bottomOffset = this->height() - 10; |
| for (int index = kKeyCommandCount - 1; index >= 0; --index) { |
| bottomOffset -= 15; |
| canvas->drawString(kKeyCommandList[index].fDescriptionL, |
| this->width() - 160, bottomOffset, |
| fLegendLeftPaint); |
| canvas->drawString(kKeyCommandList[index].fDescriptionR, |
| this->width() - 20, bottomOffset, |
| fLegendRightPaint); |
| } |
| } |
| |
| // overrides from SkEventSink |
| bool AAGeometryView::onQuery(SkEvent* evt) { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "AAGeometry"); |
| return true; |
| } |
| SkUnichar uni; |
| if (false) { |
| return this->INHERITED::onQuery(evt); |
| } |
| if (SampleCode::CharQ(*evt, &uni)) { |
| for (int index = 0; index < kButtonCount; ++index) { |
| Button* button = kButtonList[index].fButton; |
| if (button->fVisible && uni == button->fLabel) { |
| MyClick click(this, MyClick::kControlType, kButtonList[index].fButtonType); |
| click.fState = Click::kDown_State; |
| (void) this->onClick(&click); |
| return true; |
| } |
| } |
| for (int index = 0; index < kKeyCommandCount; ++index) { |
| KeyCommand& keyCommand = kKeyCommandList[index]; |
| if (uni == keyCommand.fKey || uni == keyCommand.fAlternate) { |
| return (this->*keyCommand.fFunction)(); |
| } |
| } |
| if (('A' <= uni && uni <= 'Z') || ('a' <= uni && uni <= 'z')) { |
| for (int index = 0; index < kButtonCount; ++index) { |
| Button* button = kButtonList[index].fButton; |
| if (button->fVisible && (uni & ~0x20) == (button->fLabel & ~0x20)) { |
| MyClick click(this, MyClick::kControlType, kButtonList[index].fButtonType); |
| click.fState = Click::kDown_State; |
| (void) this->onClick(&click); |
| return true; |
| } |
| } |
| } |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| DEF_SAMPLE( return new AAGeometryView; ) |