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:
ComplexClipGM(bool aaclip,bool saveLayer)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
onShortName()33 SkString onShortName() {
34 SkString str;
35 str.printf("complexclip_%s%s",
36 fDoAAClip ? "aa" : "bw",
37 fDoSaveLayer ? "_layer" : "");
38 return str;
39 }
40
onISize()41 SkISize onISize() { return make_isize(970, 780); }
42
onDraw(SkCanvas * canvas)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:
drawHairlines(SkCanvas * canvas,const SkPath & path,const SkPath & clipA,const SkPath & clipB)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
gFact0(void *)185 static GM* gFact0(void*) { return new ComplexClipGM(false, false); }
gFact1(void *)186 static GM* gFact1(void*) { return new ComplexClipGM(true, false); }
187
188 // aliased and anti-aliased w/ a layer
gFact2(void *)189 static GM* gFact2(void*) { return new ComplexClipGM(false, true); }
gFact3(void *)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