1 /*
2 * Copyright 2012 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
9 #include "gm.h"
10 #include "SkCanvas.h"
11 #include "SkAAClip.h"
12
13 namespace skiagm {
14
paint_rgn(SkCanvas * canvas,const SkAAClip & clip,const SkPaint & paint)15 static void paint_rgn(SkCanvas* canvas, const SkAAClip& clip,
16 const SkPaint& paint) {
17 SkMask mask;
18 SkBitmap bm;
19
20 clip.copyToMask(&mask);
21
22 SkAutoMaskFreeImage amfi(mask.fImage);
23
24 bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
25 mask.fBounds.height(), mask.fRowBytes);
26 bm.setPixels(mask.fImage);
27
28 // need to copy for deferred drawing test to work
29 SkBitmap bm2;
30
31 bm.deepCopyTo(&bm2, SkBitmap::kA8_Config);
32
33 canvas->drawBitmap(bm2,
34 SK_Scalar1 * mask.fBounds.fLeft,
35 SK_Scalar1 * mask.fBounds.fTop,
36 &paint);
37 }
38
39 //////////////////////////////////////////////////////////////////////////////
40 /*
41 * This GM tests anti aliased single operation booleans with SkAAClips,
42 * SkRect and SkPaths.
43 */
44 class SimpleClipGM : public GM {
45 public:
46 enum SkGeomTypes {
47 kRect_GeomType,
48 kPath_GeomType,
49 kAAClip_GeomType
50 };
51
SimpleClipGM(SkGeomTypes geomType)52 SimpleClipGM(SkGeomTypes geomType)
53 : fGeomType(geomType) {
54
55 // offset the rects a bit so we get anti-aliasing in the rect case
56 fBase.set(SkFloatToScalar(100.65f),
57 SkFloatToScalar(100.65f),
58 SkFloatToScalar(150.65f),
59 SkFloatToScalar(150.65f));
60 fRect = fBase;
61 fRect.inset(5, 5);
62 fRect.offset(25, 25);
63
64 fBasePath.addRoundRect(fBase, SkIntToScalar(5), SkIntToScalar(5));
65 fRectPath.addRoundRect(fRect, SkIntToScalar(5), SkIntToScalar(5));
66 INHERITED::setBGColor(0xFFDDDDDD);
67 }
68
69 protected:
buildRgn(SkAAClip * clip,SkRegion::Op op)70 void buildRgn(SkAAClip* clip, SkRegion::Op op) {
71 clip->setPath(fBasePath, NULL, true);
72
73 SkAAClip clip2;
74 clip2.setPath(fRectPath, NULL, true);
75 clip->op(clip2, op);
76 }
77
drawOrig(SkCanvas * canvas)78 void drawOrig(SkCanvas* canvas) {
79 SkPaint paint;
80
81 paint.setStyle(SkPaint::kStroke_Style);
82 paint.setColor(SK_ColorBLACK);
83
84 canvas->drawRect(fBase, paint);
85 canvas->drawRect(fRect, paint);
86 }
87
drawRgnOped(SkCanvas * canvas,SkRegion::Op op,SkColor color)88 void drawRgnOped(SkCanvas* canvas, SkRegion::Op op, SkColor color) {
89
90 SkAAClip clip;
91
92 this->buildRgn(&clip, op);
93 this->drawOrig(canvas);
94
95 SkPaint paint;
96 paint.setColor(color);
97 paint_rgn(canvas, clip, paint);
98 }
99
drawPathsOped(SkCanvas * canvas,SkRegion::Op op,SkColor color)100 void drawPathsOped(SkCanvas* canvas, SkRegion::Op op, SkColor color) {
101
102 this->drawOrig(canvas);
103
104 canvas->save();
105
106 // create the clip mask with the supplied boolean op
107 if (kPath_GeomType == fGeomType) {
108 // path-based case
109 canvas->clipPath(fBasePath, SkRegion::kReplace_Op, true);
110 canvas->clipPath(fRectPath, op, true);
111 } else {
112 // rect-based case
113 canvas->clipRect(fBase, SkRegion::kReplace_Op, true);
114 canvas->clipRect(fRect, op, true);
115 }
116
117 // draw a rect that will entirely cover the clip mask area
118 SkPaint paint;
119 paint.setColor(color);
120
121 SkRect r = SkRect::MakeLTRB(SkIntToScalar(90), SkIntToScalar(90),
122 SkIntToScalar(180), SkIntToScalar(180));
123
124 canvas->drawRect(r, paint);
125
126 canvas->restore();
127 }
128
onShortName()129 virtual SkString onShortName() {
130 SkString str;
131 str.printf("simpleaaclip_%s",
132 kRect_GeomType == fGeomType ? "rect" :
133 (kPath_GeomType == fGeomType ? "path" :
134 "aaclip"));
135 return str;
136 }
137
onISize()138 virtual SkISize onISize() {
139 return make_isize(640, 480);
140 }
141
onDraw(SkCanvas * canvas)142 virtual void onDraw(SkCanvas* canvas) {
143
144 static const struct {
145 SkColor fColor;
146 const char* fName;
147 SkRegion::Op fOp;
148 } gOps[] = {
149 { SK_ColorBLACK, "Difference", SkRegion::kDifference_Op },
150 { SK_ColorRED, "Intersect", SkRegion::kIntersect_Op },
151 { 0xFF008800, "Union", SkRegion::kUnion_Op },
152 { SK_ColorGREEN, "Rev Diff", SkRegion::kReverseDifference_Op },
153 { SK_ColorYELLOW, "Replace", SkRegion::kReplace_Op },
154 { SK_ColorBLUE, "XOR", SkRegion::kXOR_Op },
155 };
156
157 SkPaint textPaint;
158 textPaint.setAntiAlias(true);
159 textPaint.setTextSize(SK_Scalar1*24);
160 int xOff = 0;
161
162 for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); op++) {
163 canvas->drawText(gOps[op].fName, strlen(gOps[op].fName),
164 SkIntToScalar(75), SkIntToScalar(50),
165 textPaint);
166
167 if (kAAClip_GeomType == fGeomType) {
168 this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
169 } else {
170 this->drawPathsOped(canvas, gOps[op].fOp, gOps[op].fColor);
171 }
172
173 if (xOff >= 400) {
174 canvas->translate(SkIntToScalar(-400), SkIntToScalar(250));
175 xOff = 0;
176 } else {
177 canvas->translate(SkIntToScalar(200), 0);
178 xOff += 200;
179 }
180 }
181 }
182 private:
183
184 SkGeomTypes fGeomType;
185
186 SkRect fBase;
187 SkRect fRect;
188
189 SkPath fBasePath; // fBase as a round rect
190 SkPath fRectPath; // fRect as a round rect
191
192 typedef GM INHERITED;
193 };
194
195 //////////////////////////////////////////////////////////////////////////////
196
197 // rects
198 DEF_GM( return new SimpleClipGM(SimpleClipGM::kRect_GeomType); )
199 DEF_GM( return new SimpleClipGM(SimpleClipGM::kPath_GeomType); )
200 DEF_GM( return new SimpleClipGM(SimpleClipGM::kAAClip_GeomType); )
201
202 }
203