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    sk_tool_utils::set_portable_typeface(&paint);
43    paint.setTextSize(r.height()/2);
44    paint.setTextAlign(SkPaint::kCenter_Align);
45    canvas->save();
46    canvas->clipRect(r);
47    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
48    canvas->restore();
49}
50
51static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
52    SkPaint paint;
53
54    SkIRect bounds;
55    r.roundOut(&bounds);
56
57    SkBitmap bm;
58    bm.allocN32Pixels(bounds.width(), bounds.height());
59    bm.eraseColor(SK_ColorTRANSPARENT);
60    SkCanvas c(bm);
61    draw_path(&c, r, NULL);
62
63    paint.setImageFilter(imf);
64    canvas->save();
65    canvas->clipRect(r);
66    canvas->drawBitmap(bm, 0, 0, &paint);
67    canvas->restore();
68}
69
70static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
71    SkPaint paint;
72
73    SkIRect bounds;
74    r.roundOut(&bounds);
75
76    SkBitmap bm;
77    bm.allocN32Pixels(bounds.width(), bounds.height());
78    bm.eraseColor(SK_ColorRED);
79    SkCanvas c(bm);
80
81    SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
82    paint.setColor(SK_ColorGREEN);
83    c.drawRect(SkRect::Make(cropRect), paint);
84
85    paint.setImageFilter(imf);
86    SkPoint loc = { r.fLeft, r.fTop };
87    canvas->getTotalMatrix().mapPoints(&loc, 1);
88    canvas->drawSprite(bm,
89                       SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
90                       &paint);
91}
92
93///////////////////////////////////////////////////////////////////////////////
94
95class DropShadowImageFilterGM : public skiagm::GM {
96public:
97    DropShadowImageFilterGM () {}
98
99protected:
100
101    virtual SkString onShortName() {
102        return SkString("dropshadowimagefilter");
103    }
104
105    virtual SkISize onISize() { return SkISize::Make(400, 656); }
106
107    void draw_frame(SkCanvas* canvas, const SkRect& r) {
108        SkPaint paint;
109        paint.setStyle(SkPaint::kStroke_Style);
110        paint.setColor(SK_ColorRED);
111        canvas->drawRect(r, paint);
112    }
113
114    virtual void onDraw(SkCanvas* canvas) {
115        void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
116            draw_sprite, draw_bitmap, draw_path, draw_paint, draw_text
117        };
118
119        SkAutoTUnref<SkColorFilter> cf(
120            SkColorFilter::CreateModeFilter(SK_ColorMAGENTA, SkXfermode::kSrcIn_Mode));
121        SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf.get()));
122        SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
123                                         SkImageFilter::CropRect::kHasAll_CropEdge);
124        SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)),
125                                          SkImageFilter::CropRect::kHasAll_CropEdge);
126
127        SkImageFilter* filters[] = {
128            NULL,
129            SkDropShadowImageFilter::Create(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE,
130                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
131            SkDropShadowImageFilter::Create(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE,
132                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
133            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
134                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
135            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
136                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, cfif, NULL),
137            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
138                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, NULL, &cropRect),
139            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
140                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, NULL, &bogusRect),
141            SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
142                SkDropShadowImageFilter::kDrawShadowOnly_ShadowMode),
143        };
144
145        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
146        SkScalar MARGIN = SkIntToScalar(16);
147        SkScalar DX = r.width() + MARGIN;
148        SkScalar DY = r.height() + MARGIN;
149
150        canvas->translate(MARGIN, MARGIN);
151        for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
152            canvas->save();
153            for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
154                drawProc[j](canvas, r, filters[i]);
155                canvas->translate(0, DY);
156            }
157            canvas->restore();
158            canvas->translate(DX, 0);
159        }
160
161        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
162            SkSafeUnref(filters[j]);
163        }
164    }
165
166private:
167    typedef GM INHERITED;
168};
169
170///////////////////////////////////////////////////////////////////////////////
171
172static skiagm::GM* MyFactory(void*) { return new DropShadowImageFilterGM; }
173static skiagm::GMRegistry reg(MyFactory);
174