1/*
2 * Copyright 2013 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 "SkColorFilter.h"
10
11#include "SkColorFilterImageFilter.h"
12#include "SkDropShadowImageFilter.h"
13
14///////////////////////////////////////////////////////////////////////////////
15
16static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
17    SkPaint paint;
18    paint.setImageFilter(imf);
19    paint.setColor(SK_ColorBLACK);
20    canvas->save();
21    canvas->clipRect(r);
22    canvas->drawPaint(paint);
23    canvas->restore();
24}
25
26static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
27    SkPaint paint;
28    paint.setColor(SK_ColorGREEN);
29    paint.setImageFilter(imf);
30    paint.setAntiAlias(true);
31    canvas->save();
32    canvas->clipRect(r);
33    canvas->drawCircle(r.centerX(), r.centerY(), r.width()/3, paint);
34    canvas->restore();
35}
36
37static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
38    SkPaint paint;
39    paint.setImageFilter(imf);
40    paint.setColor(SK_ColorGREEN);
41    paint.setAntiAlias(true);
42    paint.setTextSize(r.height()/2);
43    paint.setTextAlign(SkPaint::kCenter_Align);
44    canvas->save();
45    canvas->clipRect(r);
46    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
47    canvas->restore();
48}
49
50static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
51    SkPaint paint;
52
53    SkIRect bounds;
54    r.roundOut(&bounds);
55
56    SkBitmap bm;
57    bm.allocN32Pixels(bounds.width(), bounds.height());
58    bm.eraseColor(SK_ColorTRANSPARENT);
59    SkCanvas c(bm);
60    draw_path(&c, r, NULL);
61
62    paint.setImageFilter(imf);
63    canvas->save();
64    canvas->clipRect(r);
65    canvas->drawBitmap(bm, 0, 0, &paint);
66    canvas->restore();
67}
68
69static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
70    SkPaint paint;
71
72    SkIRect bounds;
73    r.roundOut(&bounds);
74
75    SkBitmap bm;
76    bm.allocN32Pixels(bounds.width(), bounds.height());
77    bm.eraseColor(SK_ColorRED);
78    SkCanvas c(bm);
79
80    SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
81    paint.setColor(SK_ColorGREEN);
82    c.drawRect(SkRect::Make(cropRect), paint);
83
84    paint.setImageFilter(imf);
85    SkPoint loc = { r.fLeft, r.fTop };
86    canvas->getTotalMatrix().mapPoints(&loc, 1);
87    canvas->drawSprite(bm,
88                       SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
89                       &paint);
90}
91
92///////////////////////////////////////////////////////////////////////////////
93
94class DropShadowImageFilterGM : public skiagm::GM {
95public:
96    DropShadowImageFilterGM () {}
97
98protected:
99
100    virtual SkString onShortName() {
101        return SkString("dropshadowimagefilter");
102    }
103
104    virtual SkISize onISize() { return SkISize::Make(400, 700); }
105
106    void draw_frame(SkCanvas* canvas, const SkRect& r) {
107        SkPaint paint;
108        paint.setStyle(SkPaint::kStroke_Style);
109        paint.setColor(SK_ColorRED);
110        canvas->drawRect(r, paint);
111    }
112
113    virtual uint32_t onGetFlags() const {
114        // Because of the use of drawSprite, this test is excluded
115        // from scaled replay tests because drawSprite ignores the
116        // reciprocal scale that is applied at record time, which is
117        // the intended behavior of drawSprite.
118        return kSkipScaledReplay_Flag | kSkipTiled_Flag;
119    }
120
121    virtual void onDraw(SkCanvas* canvas) {
122        void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
123            draw_sprite, draw_bitmap, draw_path, draw_paint, draw_text
124        };
125
126        SkAutoTUnref<SkColorFilter> cf(
127            SkColorFilter::CreateModeFilter(SK_ColorMAGENTA, SkXfermode::kSrcIn_Mode));
128        SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf.get()));
129        SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
130                                         SkImageFilter::CropRect::kHasAll_CropEdge);
131        SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)),
132                                          SkImageFilter::CropRect::kHasAll_CropEdge);
133
134        SkImageFilter* filters[] = {
135            NULL,
136            SkDropShadowImageFilter::Create(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE),
137            SkDropShadowImageFilter::Create(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE),
138            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE),
139            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, cfif),
140            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, NULL, &cropRect),
141            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, NULL, &bogusRect),
142        };
143
144        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
145        SkScalar MARGIN = SkIntToScalar(16);
146        SkScalar DX = r.width() + MARGIN;
147        SkScalar DY = r.height() + MARGIN;
148
149        canvas->translate(MARGIN, MARGIN);
150        for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
151            canvas->save();
152            for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
153                drawProc[j](canvas, r, filters[i]);
154                canvas->translate(0, DY);
155            }
156            canvas->restore();
157            canvas->translate(DX, 0);
158        }
159
160        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
161            SkSafeUnref(filters[j]);
162        }
163    }
164
165private:
166    typedef GM INHERITED;
167};
168
169///////////////////////////////////////////////////////////////////////////////
170
171static skiagm::GM* MyFactory(void*) { return new DropShadowImageFilterGM; }
172static skiagm::GMRegistry reg(MyFactory);
173