1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "gm.h" 9 #include "SkCanvas.h" 10 //#include "SkParsePath.h" 11 #include "SkPath.h" 12 //#include "SkRandom.h" 13 14 namespace skiagm { 15 16 static const SkColor gPathColor = SK_ColorBLACK; 17 static const SkColor gClipAColor = SK_ColorBLUE; 18 static const SkColor gClipBColor = SK_ColorRED; 19 20 class ComplexClipGM : public GM { 21 bool fDoAAClip; 22 bool fDoSaveLayer; 23 public: 24 ComplexClipGM(bool aaclip, bool saveLayer) 25 : fDoAAClip(aaclip) 26 , fDoSaveLayer(saveLayer) { 27 this->setBGColor(0xFFDDDDDD); 28 // this->setBGColor(SkColorSetRGB(0xB0,0xDD,0xB0)); 29 } 30 31 protected: 32 33 SkString onShortName() { 34 SkString str; 35 str.printf("complexclip_%s%s", 36 fDoAAClip ? "aa" : "bw", 37 fDoSaveLayer ? "_layer" : ""); 38 return str; 39 } 40 41 SkISize onISize() { return make_isize(970, 780); } 42 43 virtual void onDraw(SkCanvas* canvas) { 44 SkPath path; 45 path.moveTo(SkIntToScalar(0), SkIntToScalar(50)); 46 path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0)); 47 path.lineTo(SkIntToScalar(175), SkIntToScalar(0)); 48 path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25)); 49 path.lineTo(SkIntToScalar(200), SkIntToScalar(150)); 50 path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200)); 51 path.lineTo(SkIntToScalar(0), SkIntToScalar(200)); 52 path.close(); 53 path.moveTo(SkIntToScalar(50), SkIntToScalar(50)); 54 path.lineTo(SkIntToScalar(150), SkIntToScalar(50)); 55 path.lineTo(SkIntToScalar(150), SkIntToScalar(125)); 56 path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150)); 57 path.lineTo(SkIntToScalar(50), SkIntToScalar(150)); 58 path.close(); 59 path.setFillType(SkPath::kEvenOdd_FillType); 60 SkPaint pathPaint; 61 pathPaint.setAntiAlias(true); 62 pathPaint.setColor(gPathColor); 63 64 SkPath clipA; 65 clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20)); 66 clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22)); 67 clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105)); 68 clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177)); 69 clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180)); 70 clipA.close(); 71 72 SkPath clipB; 73 clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10)); 74 clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15)); 75 clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190)); 76 clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185)); 77 clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100)); 78 clipB.close(); 79 80 SkPaint paint; 81 paint.setAntiAlias(true); 82 paint.setTextSize(SkIntToScalar(20)); 83 84 static const struct { 85 SkRegion::Op fOp; 86 const char* fName; 87 } gOps[] = { //extra spaces in names for measureText 88 {SkRegion::kIntersect_Op, "Isect "}, 89 {SkRegion::kDifference_Op, "Diff " }, 90 {SkRegion::kUnion_Op, "Union "}, 91 {SkRegion::kXOR_Op, "Xor " }, 92 {SkRegion::kReverseDifference_Op, "RDiff "} 93 }; 94 95 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); 96 canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4); 97 98 if (fDoSaveLayer) { 99 // We want the layer to appear symmetric relative to actual 100 // device boundaries so we need to "undo" the effect of the 101 // scale and translate 102 SkRect bounds = SkRect::MakeLTRB( 103 4.0f/3.0f * -20, 104 4.0f/3.0f * -20, 105 4.0f/3.0f * (this->getISize().fWidth - 20), 106 4.0f/3.0f * (this->getISize().fHeight - 20)); 107 108 bounds.inset(SkIntToScalar(100), SkIntToScalar(100)); 109 SkPaint boundPaint; 110 boundPaint.setColor(SK_ColorRED); 111 boundPaint.setStyle(SkPaint::kStroke_Style); 112 canvas->drawRect(bounds, boundPaint); 113 canvas->saveLayer(&bounds, NULL); 114 } 115 116 for (int invBits = 0; invBits < 4; ++invBits) { 117 canvas->save(); 118 for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) { 119 this->drawHairlines(canvas, path, clipA, clipB); 120 121 bool doInvA = SkToBool(invBits & 1); 122 bool doInvB = SkToBool(invBits & 2); 123 canvas->save(); 124 // set clip 125 clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType : 126 SkPath::kEvenOdd_FillType); 127 clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType : 128 SkPath::kEvenOdd_FillType); 129 canvas->clipPath(clipA, SkRegion::kIntersect_Op, fDoAAClip); 130 canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip); 131 132 // draw path clipped 133 canvas->drawPath(path, pathPaint); 134 canvas->restore(); 135 136 137 SkScalar txtX = SkIntToScalar(45); 138 paint.setColor(gClipAColor); 139 const char* aTxt = doInvA ? "InvA " : "A "; 140 canvas->drawText(aTxt, strlen(aTxt), txtX, SkIntToScalar(220), paint); 141 txtX += paint.measureText(aTxt, strlen(aTxt)); 142 paint.setColor(SK_ColorBLACK); 143 canvas->drawText(gOps[op].fName, strlen(gOps[op].fName), 144 txtX, SkIntToScalar(220), paint); 145 txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName)); 146 paint.setColor(gClipBColor); 147 const char* bTxt = doInvB ? "InvB " : "B "; 148 canvas->drawText(bTxt, strlen(bTxt), txtX, SkIntToScalar(220), paint); 149 150 canvas->translate(SkIntToScalar(250),0); 151 } 152 canvas->restore(); 153 canvas->translate(0, SkIntToScalar(250)); 154 } 155 156 if (fDoSaveLayer) { 157 canvas->restore(); 158 } 159 } 160 private: 161 void drawHairlines(SkCanvas* canvas, const SkPath& path, 162 const SkPath& clipA, const SkPath& clipB) { 163 SkPaint paint; 164 paint.setAntiAlias(true); 165 paint.setStyle(SkPaint::kStroke_Style); 166 const SkAlpha fade = 0x33; 167 168 // draw path in hairline 169 paint.setColor(gPathColor); paint.setAlpha(fade); 170 canvas->drawPath(path, paint); 171 172 // draw clips in hair line 173 paint.setColor(gClipAColor); paint.setAlpha(fade); 174 canvas->drawPath(clipA, paint); 175 paint.setColor(gClipBColor); paint.setAlpha(fade); 176 canvas->drawPath(clipB, paint); 177 } 178 179 typedef GM INHERITED; 180 }; 181 182 ////////////////////////////////////////////////////////////////////////////// 183 184 // aliased and anti-aliased w/o a layer 185 static GM* gFact0(void*) { return new ComplexClipGM(false, false); } 186 static GM* gFact1(void*) { return new ComplexClipGM(true, false); } 187 188 // aliased and anti-aliased w/ a layer 189 static GM* gFact2(void*) { return new ComplexClipGM(false, true); } 190 static GM* gFact3(void*) { return new ComplexClipGM(true, true); } 191 192 static GMRegistry gReg0(gFact0); 193 static GMRegistry gReg1(gFact1); 194 static GMRegistry gReg2(gFact2); 195 static GMRegistry gReg3(gFact3); 196 197 } 198
