1/*
2 * Copyright 2011 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 "SkCanvas.h"
10#include "SkColorFilter.h"
11#include "SkColorPriv.h"
12#include "SkShader.h"
13
14#include "SkBlurImageFilter.h"
15#include "SkMorphologyImageFilter.h"
16#include "SkColorFilterImageFilter.h"
17#include "SkBitmapSource.h"
18#include "SkMergeImageFilter.h"
19#include "SkOffsetImageFilter.h"
20#include "SkTestImageFilters.h"
21
22///////////////////////////////////////////////////////////////////////////////
23
24static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
25    SkPaint paint;
26    paint.setImageFilter(imf);
27    paint.setColor(SK_ColorBLACK);
28    canvas->save();
29    canvas->clipRect(r);
30    canvas->drawPaint(paint);
31    canvas->restore();
32}
33
34static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
35    SkPaint paint;
36    paint.setColor(SK_ColorMAGENTA);
37    paint.setImageFilter(imf);
38    paint.setAntiAlias(true);
39    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
40}
41
42static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
43    SkPaint paint;
44    paint.setImageFilter(imf);
45    paint.setColor(SK_ColorGREEN);
46    paint.setAntiAlias(true);
47    sk_tool_utils::set_portable_typeface(&paint);
48    paint.setTextSize(r.height()/2);
49    paint.setTextAlign(SkPaint::kCenter_Align);
50    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
51}
52
53static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
54    SkPaint paint;
55
56    SkIRect bounds;
57    r.roundOut(&bounds);
58
59    SkBitmap bm;
60    bm.allocN32Pixels(bounds.width(), bounds.height());
61    bm.eraseColor(SK_ColorTRANSPARENT);
62    SkCanvas c(bm);
63    draw_path(&c, r, NULL);
64
65    paint.setImageFilter(imf);
66    canvas->drawBitmap(bm, 0, 0, &paint);
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 ImageFiltersCroppedGM : public skiagm::GM {
95public:
96    ImageFiltersCroppedGM () {}
97
98protected:
99    virtual SkString onShortName() override {
100        return SkString("imagefilterscropped");
101    }
102
103    virtual SkISize onISize() override { return SkISize::Make(400, 880); }
104
105    void make_checkerboard() {
106        fCheckerboard.allocN32Pixels(80, 80);
107        SkCanvas canvas(fCheckerboard);
108        canvas.clear(SK_ColorTRANSPARENT);
109        SkPaint darkPaint;
110        darkPaint.setColor(0xFF404040);
111        SkPaint lightPaint;
112        lightPaint.setColor(0xFFA0A0A0);
113        for (int y = 0; y < 80; y += 16) {
114            for (int x = 0; x < 80; x += 16) {
115                canvas.save();
116                canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
117                canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
118                canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
119                canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
120                canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
121                canvas.restore();
122            }
123        }
124    }
125
126    void draw_frame(SkCanvas* canvas, const SkRect& r) {
127        SkPaint paint;
128        paint.setStyle(SkPaint::kStroke_Style);
129        paint.setColor(SK_ColorRED);
130        canvas->drawRect(r, paint);
131    }
132
133    virtual void onOnceBeforeDraw() override{
134        make_checkerboard();
135    }
136
137    virtual void onDraw(SkCanvas* canvas) override {
138        void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
139            draw_sprite, draw_bitmap, draw_path, draw_paint, draw_text
140        };
141
142        SkAutoTUnref<SkColorFilter> cf(
143            SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
144        SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)), SkImageFilter::CropRect::kHasAll_CropEdge);
145        SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)), SkImageFilter::CropRect::kHasAll_CropEdge);
146
147        SkAutoTUnref<SkImageFilter> offset(SkOffsetImageFilter::Create(
148            SkIntToScalar(-10), SkIntToScalar(-10)));
149
150        SkAutoTUnref<SkImageFilter> cfOffset(SkColorFilterImageFilter::Create(cf.get(), offset.get()));
151
152        SkAutoTUnref<SkImageFilter> erodeX(SkErodeImageFilter::Create(8, 0, NULL, &cropRect));
153        SkAutoTUnref<SkImageFilter> erodeY(SkErodeImageFilter::Create(0, 8, NULL, &cropRect));
154
155        SkImageFilter* filters[] = {
156            NULL,
157            SkColorFilterImageFilter::Create(cf.get(), NULL, &cropRect),
158            SkBlurImageFilter::Create(1.0f, 1.0f, NULL, &cropRect),
159            SkBlurImageFilter::Create(8.0f, 0.0f, NULL, &cropRect),
160            SkBlurImageFilter::Create(0.0f, 8.0f, NULL, &cropRect),
161            SkBlurImageFilter::Create(8.0f, 8.0f, NULL, &cropRect),
162            SkErodeImageFilter::Create(1, 1, NULL, &cropRect),
163            SkErodeImageFilter::Create(8, 0, erodeY, &cropRect),
164            SkErodeImageFilter::Create(0, 8, erodeX, &cropRect),
165            SkErodeImageFilter::Create(8, 8, NULL, &cropRect),
166            SkMergeImageFilter::Create(NULL, cfOffset.get(), SkXfermode::kSrcOver_Mode, &cropRect),
167            SkBlurImageFilter::Create(8.0f, 8.0f, NULL, &bogusRect),
168            SkColorFilterImageFilter::Create(cf.get(), NULL, &bogusRect),
169        };
170
171        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
172        SkScalar MARGIN = SkIntToScalar(16);
173        SkScalar DX = r.width() + MARGIN;
174        SkScalar DY = r.height() + MARGIN;
175
176        canvas->translate(MARGIN, MARGIN);
177        for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
178            canvas->save();
179            for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
180                SkPaint paint;
181                canvas->drawBitmap(fCheckerboard, 0, 0);
182                drawProc[j](canvas, r, filters[i]);
183                canvas->translate(0, DY);
184            }
185            canvas->restore();
186            canvas->translate(DX, 0);
187        }
188
189        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
190            SkSafeUnref(filters[j]);
191        }
192    }
193
194private:
195    SkBitmap fCheckerboard;
196    typedef GM INHERITED;
197};
198
199///////////////////////////////////////////////////////////////////////////////
200
201static skiagm::GM* MyFactory(void*) { return new ImageFiltersCroppedGM; }
202static skiagm::GMRegistry reg(MyFactory);
203