1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm.h" 9 #include "sk_tool_utils.h" 10 #include "SkCanvas.h" 11 #include "SkPath.h" 12 13 namespace skiagm { 14 15 constexpr SkColor gPathColor = SK_ColorBLACK; 16 constexpr SkColor gClipAColor = SK_ColorBLUE; 17 constexpr SkColor gClipBColor = SK_ColorRED; 18 19 class ComplexClipGM : public GM { 20 public: 21 ComplexClipGM(bool aaclip, bool saveLayer, bool invertDraw) 22 : fDoAAClip(aaclip) 23 , fDoSaveLayer(saveLayer) 24 , fInvertDraw(invertDraw) { 25 this->setBGColor(0xFFDEDFDE); 26 } 27 28 protected: 29 30 31 SkString onShortName() { 32 SkString str; 33 str.printf("complexclip_%s%s%s", 34 fDoAAClip ? "aa" : "bw", 35 fDoSaveLayer ? "_layer" : "", 36 fInvertDraw ? "_invert" : ""); 37 return str; 38 } 39 40 SkISize onISize() { return SkISize::Make(970, 780); } 41 42 virtual void onDraw(SkCanvas* canvas) { 43 SkPath path; 44 path.moveTo(SkIntToScalar(0), SkIntToScalar(50)); 45 path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0)); 46 path.lineTo(SkIntToScalar(175), SkIntToScalar(0)); 47 path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25)); 48 path.lineTo(SkIntToScalar(200), SkIntToScalar(150)); 49 path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200)); 50 path.lineTo(SkIntToScalar(0), SkIntToScalar(200)); 51 path.close(); 52 path.moveTo(SkIntToScalar(50), SkIntToScalar(50)); 53 path.lineTo(SkIntToScalar(150), SkIntToScalar(50)); 54 path.lineTo(SkIntToScalar(150), SkIntToScalar(125)); 55 path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150)); 56 path.lineTo(SkIntToScalar(50), SkIntToScalar(150)); 57 path.close(); 58 if (fInvertDraw) { 59 path.setFillType(SkPath::kInverseEvenOdd_FillType); 60 } else { 61 path.setFillType(SkPath::kEvenOdd_FillType); 62 } 63 SkPaint pathPaint; 64 pathPaint.setAntiAlias(true); 65 pathPaint.setColor(gPathColor); 66 67 SkPath clipA; 68 clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20)); 69 clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22)); 70 clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105)); 71 clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177)); 72 clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180)); 73 clipA.close(); 74 75 SkPath clipB; 76 clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10)); 77 clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15)); 78 clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190)); 79 clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185)); 80 clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100)); 81 clipB.close(); 82 83 SkPaint paint; 84 paint.setAntiAlias(true); 85 sk_tool_utils::set_portable_typeface(&paint); 86 paint.setTextSize(SkIntToScalar(20)); 87 88 constexpr struct { 89 SkClipOp fOp; 90 const char* fName; 91 } gOps[] = { //extra spaces in names for measureText 92 {kIntersect_SkClipOp, "Isect "}, 93 {kDifference_SkClipOp, "Diff " }, 94 {kUnion_SkClipOp, "Union "}, 95 {kXOR_SkClipOp, "Xor " }, 96 {kReverseDifference_SkClipOp, "RDiff "} 97 }; 98 99 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); 100 canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4); 101 102 if (fDoSaveLayer) { 103 // We want the layer to appear symmetric relative to actual 104 // device boundaries so we need to "undo" the effect of the 105 // scale and translate 106 SkRect bounds = SkRect::MakeLTRB( 107 4.0f/3.0f * -20, 108 4.0f/3.0f * -20, 109 4.0f/3.0f * (this->getISize().fWidth - 20), 110 4.0f/3.0f * (this->getISize().fHeight - 20)); 111 112 bounds.inset(SkIntToScalar(100), SkIntToScalar(100)); 113 SkPaint boundPaint; 114 boundPaint.setColor(SK_ColorRED); 115 boundPaint.setStyle(SkPaint::kStroke_Style); 116 canvas->drawRect(bounds, boundPaint); 117 canvas->saveLayer(&bounds, nullptr); 118 } 119 120 for (int invBits = 0; invBits < 4; ++invBits) { 121 canvas->save(); 122 for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) { 123 this->drawHairlines(canvas, path, clipA, clipB); 124 125 bool doInvA = SkToBool(invBits & 1); 126 bool doInvB = SkToBool(invBits & 2); 127 canvas->save(); 128 // set clip 129 clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType : 130 SkPath::kEvenOdd_FillType); 131 clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType : 132 SkPath::kEvenOdd_FillType); 133 canvas->clipPath(clipA, fDoAAClip); 134 canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip); 135 136 // In the inverse case we need to prevent the draw from covering the whole 137 // canvas. 138 if (fInvertDraw) { 139 SkRect rectClip = clipA.getBounds(); 140 rectClip.join(path.getBounds()); 141 rectClip.join(path.getBounds()); 142 rectClip.outset(5, 5); 143 canvas->clipRect(rectClip); 144 } 145 146 // draw path clipped 147 canvas->drawPath(path, pathPaint); 148 canvas->restore(); 149 150 151 SkScalar txtX = SkIntToScalar(45); 152 paint.setColor(gClipAColor); 153 const char* aTxt = doInvA ? "InvA " : "A "; 154 canvas->drawString(aTxt, txtX, SkIntToScalar(220), paint); 155 txtX += paint.measureText(aTxt, strlen(aTxt)); 156 paint.setColor(SK_ColorBLACK); 157 canvas->drawString(gOps[op].fName, txtX, SkIntToScalar(220), paint); 158 txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName)); 159 paint.setColor(gClipBColor); 160 const char* bTxt = doInvB ? "InvB " : "B "; 161 canvas->drawString(bTxt, txtX, SkIntToScalar(220), paint); 162 163 canvas->translate(SkIntToScalar(250),0); 164 } 165 canvas->restore(); 166 canvas->translate(0, SkIntToScalar(250)); 167 } 168 169 if (fDoSaveLayer) { 170 canvas->restore(); 171 } 172 } 173 private: 174 void drawHairlines(SkCanvas* canvas, const SkPath& path, 175 const SkPath& clipA, const SkPath& clipB) { 176 SkPaint paint; 177 paint.setAntiAlias(true); 178 paint.setStyle(SkPaint::kStroke_Style); 179 const SkAlpha fade = 0x33; 180 181 // draw path in hairline 182 paint.setColor(gPathColor); paint.setAlpha(fade); 183 canvas->drawPath(path, paint); 184 185 // draw clips in hair line 186 paint.setColor(gClipAColor); paint.setAlpha(fade); 187 canvas->drawPath(clipA, paint); 188 paint.setColor(gClipBColor); paint.setAlpha(fade); 189 canvas->drawPath(clipB, paint); 190 } 191 192 bool fDoAAClip; 193 bool fDoSaveLayer; 194 bool fInvertDraw; 195 196 typedef GM INHERITED; 197 }; 198 199 ////////////////////////////////////////////////////////////////////////////// 200 201 DEF_GM(return new ComplexClipGM(false, false, false);) 202 DEF_GM(return new ComplexClipGM(false, false, true);) 203 DEF_GM(return new ComplexClipGM(false, true, false);) 204 DEF_GM(return new ComplexClipGM(false, true, true);) 205 DEF_GM(return new ComplexClipGM(true, false, false);) 206 DEF_GM(return new ComplexClipGM(true, false, true);) 207 DEF_GM(return new ComplexClipGM(true, true, false);) 208 DEF_GM(return new ComplexClipGM(true, true, true);) 209 } 210
