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#include "gm.h"
9#include "sk_tool_utils.h"
10#include "SkAAClip.h"
11#include "SkCanvas.h"
12#include "SkPath.h"
13
14namespace skiagm {
15
16static void paint_rgn(SkCanvas* canvas, const SkAAClip& clip,
17                      const SkPaint& paint) {
18    SkMask mask;
19    SkBitmap bm;
20
21    clip.copyToMask(&mask);
22
23    SkAutoMaskFreeImage amfi(mask.fImage);
24
25    bm.installMaskPixels(mask);
26
27    // need to copy for deferred drawing test to work
28    SkBitmap bm2;
29
30    sk_tool_utils::copy_to(&bm2, bm.colorType(), bm);
31
32    canvas->drawBitmap(bm2,
33                       SK_Scalar1 * mask.fBounds.fLeft,
34                       SK_Scalar1 * mask.fBounds.fTop,
35                       &paint);
36}
37
38//////////////////////////////////////////////////////////////////////////////
39/*
40 * This GM tests anti aliased single operation booleans with SkAAClips,
41 * SkRect and SkPaths.
42 */
43class SimpleClipGM : public GM {
44public:
45    enum SkGeomTypes {
46        kRect_GeomType,
47        kPath_GeomType,
48        kAAClip_GeomType
49    };
50
51    SimpleClipGM(SkGeomTypes geomType)
52    : fGeomType(geomType) {
53    }
54
55protected:
56    void onOnceBeforeDraw() override {
57        // offset the rects a bit so we get anti-aliasing in the rect case
58        fBase.set(100.65f,
59                  100.65f,
60                  150.65f,
61                  150.65f);
62        fRect = fBase;
63        fRect.inset(5, 5);
64        fRect.offset(25, 25);
65
66        fBasePath.addRoundRect(fBase, SkIntToScalar(5), SkIntToScalar(5));
67        fRectPath.addRoundRect(fRect, SkIntToScalar(5), SkIntToScalar(5));
68        INHERITED::setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
69    }
70
71    void buildRgn(SkAAClip* clip, SkClipOp op) {
72        clip->setPath(fBasePath, nullptr, true);
73
74        SkAAClip clip2;
75        clip2.setPath(fRectPath, nullptr, true);
76        clip->op(clip2, (SkRegion::Op)op);
77    }
78
79    void drawOrig(SkCanvas* canvas) {
80        SkPaint     paint;
81
82        paint.setStyle(SkPaint::kStroke_Style);
83        paint.setColor(SK_ColorBLACK);
84
85        canvas->drawRect(fBase, paint);
86        canvas->drawRect(fRect, paint);
87    }
88
89    void drawRgnOped(SkCanvas* canvas, SkClipOp op, SkColor color) {
90
91        SkAAClip clip;
92
93        this->buildRgn(&clip, op);
94        this->drawOrig(canvas);
95
96        SkPaint paint;
97        paint.setColor(color);
98        paint_rgn(canvas, clip, paint);
99    }
100
101    void drawPathsOped(SkCanvas* canvas, SkClipOp op, SkColor color) {
102
103        this->drawOrig(canvas);
104
105        canvas->save();
106
107        // create the clip mask with the supplied boolean op
108        if (kPath_GeomType == fGeomType) {
109            // path-based case
110            canvas->clipPath(fBasePath, true);
111            canvas->clipPath(fRectPath, op, true);
112        } else {
113            // rect-based case
114            canvas->clipRect(fBase, true);
115            canvas->clipRect(fRect, op, true);
116        }
117
118        // draw a rect that will entirely cover the clip mask area
119        SkPaint paint;
120        paint.setColor(color);
121
122        SkRect r = SkRect::MakeLTRB(SkIntToScalar(90),  SkIntToScalar(90),
123                                    SkIntToScalar(180), SkIntToScalar(180));
124
125        canvas->drawRect(r, paint);
126
127        canvas->restore();
128    }
129
130    SkString onShortName() override {
131        SkString str;
132        str.printf("simpleaaclip_%s",
133                    kRect_GeomType == fGeomType ? "rect" :
134                    (kPath_GeomType == fGeomType ? "path" :
135                    "aaclip"));
136        return str;
137    }
138
139    SkISize onISize() override {
140        return SkISize::Make(640, 480);
141    }
142
143    void onDraw(SkCanvas* canvas) override {
144
145        const struct {
146            SkColor         fColor;
147            const char*     fName;
148            SkClipOp        fOp;
149        } gOps[] = {
150            { SK_ColorBLACK,    "Difference", kDifference_SkClipOp    },
151            { SK_ColorRED,      "Intersect",  kIntersect_SkClipOp     },
152            { sk_tool_utils::color_to_565(0xFF008800), "Union", kUnion_SkClipOp },
153            { SK_ColorGREEN,    "Rev Diff",   kReverseDifference_SkClipOp },
154            { SK_ColorYELLOW,   "Replace",    kReplace_SkClipOp       },
155            { SK_ColorBLUE,     "XOR",        kXOR_SkClipOp           },
156        };
157
158        SkPaint textPaint;
159        textPaint.setAntiAlias(true);
160        sk_tool_utils::set_portable_typeface(&textPaint);
161        textPaint.setTextSize(SK_Scalar1*24);
162        int xOff = 0;
163
164        for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); op++) {
165            canvas->drawString(gOps[op].fName,
166                             SkIntToScalar(75), SkIntToScalar(50),
167                             textPaint);
168
169            if (kAAClip_GeomType == fGeomType) {
170                this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
171            } else {
172                this->drawPathsOped(canvas, gOps[op].fOp, gOps[op].fColor);
173            }
174
175            if (xOff >= 400) {
176                canvas->translate(SkIntToScalar(-400), SkIntToScalar(250));
177                xOff = 0;
178            } else {
179                canvas->translate(SkIntToScalar(200), 0);
180                xOff += 200;
181            }
182        }
183    }
184private:
185
186    SkGeomTypes fGeomType;
187
188    SkRect fBase;
189    SkRect fRect;
190
191    SkPath fBasePath;       // fBase as a round rect
192    SkPath fRectPath;       // fRect as a round rect
193
194    typedef GM INHERITED;
195};
196
197//////////////////////////////////////////////////////////////////////////////
198
199// rects
200DEF_GM( return new SimpleClipGM(SimpleClipGM::kRect_GeomType); )
201DEF_GM( return new SimpleClipGM(SimpleClipGM::kPath_GeomType); )
202DEF_GM( return new SimpleClipGM(SimpleClipGM::kAAClip_GeomType); )
203
204}
205