simpleaaclip.cpp revision 0bdb08b1ba8fbd18c4838f86a23f1ef4b3a3bfdf 
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
13namespace skiagm {
14
15static 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.installMaskPixels(mask);
25
26    // need to copy for deferred drawing test to work
27    SkBitmap bm2;
28
29    bm.deepCopyTo(&bm2);
30
31    canvas->drawBitmap(bm2,
32                       SK_Scalar1 * mask.fBounds.fLeft,
33                       SK_Scalar1 * mask.fBounds.fTop,
34                       &paint);
35}
36
37//////////////////////////////////////////////////////////////////////////////
38/*
39 * This GM tests anti aliased single operation booleans with SkAAClips,
40 * SkRect and SkPaths.
41 */
42class SimpleClipGM : public GM {
43public:
44    enum SkGeomTypes {
45        kRect_GeomType,
46        kPath_GeomType,
47        kAAClip_GeomType
48    };
49
50    SimpleClipGM(SkGeomTypes geomType)
51    : fGeomType(geomType) {
52    }
53
54protected:
55    void onOnceBeforeDraw() override {
56        // offset the rects a bit so we get anti-aliasing in the rect case
57        fBase.set(100.65f,
58                  100.65f,
59                  150.65f,
60                  150.65f);
61        fRect = fBase;
62        fRect.inset(5, 5);
63        fRect.offset(25, 25);
64
65        fBasePath.addRoundRect(fBase, SkIntToScalar(5), SkIntToScalar(5));
66        fRectPath.addRoundRect(fRect, SkIntToScalar(5), SkIntToScalar(5));
67        INHERITED::setBGColor(0xFFDDDDDD);
68    }
69
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
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
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
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
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
138    virtual SkISize onISize() {
139        return SkISize::Make(640, 480);
140    }
141
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        sk_tool_utils::set_portable_typeface(&textPaint);
160        textPaint.setTextSize(SK_Scalar1*24);
161        int xOff = 0;
162
163        for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); op++) {
164            canvas->drawText(gOps[op].fName, strlen(gOps[op].fName),
165                             SkIntToScalar(75), SkIntToScalar(50),
166                             textPaint);
167
168            if (kAAClip_GeomType == fGeomType) {
169                this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
170            } else {
171                this->drawPathsOped(canvas, gOps[op].fOp, gOps[op].fColor);
172            }
173
174            if (xOff >= 400) {
175                canvas->translate(SkIntToScalar(-400), SkIntToScalar(250));
176                xOff = 0;
177            } else {
178                canvas->translate(SkIntToScalar(200), 0);
179                xOff += 200;
180            }
181        }
182    }
183private:
184
185    SkGeomTypes fGeomType;
186
187    SkRect fBase;
188    SkRect fRect;
189
190    SkPath fBasePath;       // fBase as a round rect
191    SkPath fRectPath;       // fRect as a round rect
192
193    typedef GM INHERITED;
194};
195
196//////////////////////////////////////////////////////////////////////////////
197
198// rects
199DEF_GM( return new SimpleClipGM(SimpleClipGM::kRect_GeomType); )
200DEF_GM( return new SimpleClipGM(SimpleClipGM::kPath_GeomType); )
201DEF_GM( return new SimpleClipGM(SimpleClipGM::kAAClip_GeomType); )
202
203}
204