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 "sk_tool_utils.h"
10#include "SkCanvas.h"
11#include "SkColorFilter.h"
12#include "SkColorPriv.h"
13#include "SkShader.h"
14
15#include "SkBlurImageFilter.h"
16#include "SkMorphologyImageFilter.h"
17#include "SkColorFilterImageFilter.h"
18#include "SkMergeImageFilter.h"
19#include "SkOffsetImageFilter.h"
20
21///////////////////////////////////////////////////////////////////////////////
22
23static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
24    SkPaint paint;
25    paint.setImageFilter(std::move(imf));
26    paint.setColor(SK_ColorBLACK);
27    canvas->save();
28    canvas->clipRect(r);
29    canvas->drawPaint(paint);
30    canvas->restore();
31}
32
33static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
34    SkPaint paint;
35    paint.setColor(SK_ColorMAGENTA);
36    paint.setImageFilter(std::move(imf));
37    paint.setAntiAlias(true);
38    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
39}
40
41static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
42    SkPaint paint;
43    paint.setImageFilter(std::move(imf));
44    paint.setColor(SK_ColorGREEN);
45    paint.setAntiAlias(true);
46    sk_tool_utils::set_portable_typeface(&paint);
47    paint.setTextSize(r.height()/2);
48    paint.setTextAlign(SkPaint::kCenter_Align);
49    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
50}
51
52static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
53    SkPaint paint;
54
55    SkIRect bounds;
56    r.roundOut(&bounds);
57
58    SkBitmap bm;
59    bm.allocN32Pixels(bounds.width(), bounds.height());
60    bm.eraseColor(SK_ColorTRANSPARENT);
61    SkCanvas c(bm);
62    draw_path(&c, r, nullptr);
63
64    paint.setImageFilter(std::move(imf));
65    canvas->drawBitmap(bm, 0, 0, &paint);
66}
67
68///////////////////////////////////////////////////////////////////////////////
69
70class ImageFiltersCroppedGM : public skiagm::GM {
71public:
72    ImageFiltersCroppedGM () {}
73
74protected:
75    SkString onShortName() override {
76        return SkString("imagefilterscropped");
77    }
78
79    SkISize onISize() override { return SkISize::Make(400, 960); }
80
81    void make_checkerboard() {
82        fCheckerboard.allocN32Pixels(80, 80);
83        SkCanvas canvas(fCheckerboard);
84        canvas.clear(SK_ColorTRANSPARENT);
85        SkPaint darkPaint;
86        darkPaint.setColor(sk_tool_utils::color_to_565(0xFF404040));
87        SkPaint lightPaint;
88        lightPaint.setColor(sk_tool_utils::color_to_565(0xFFA0A0A0));
89        for (int y = 0; y < 80; y += 16) {
90            for (int x = 0; x < 80; x += 16) {
91                canvas.save();
92                canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
93                canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
94                canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
95                canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
96                canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
97                canvas.restore();
98            }
99        }
100    }
101
102    void draw_frame(SkCanvas* canvas, const SkRect& r) {
103        SkPaint paint;
104        paint.setStyle(SkPaint::kStroke_Style);
105        paint.setColor(SK_ColorRED);
106        canvas->drawRect(r, paint);
107    }
108
109    void onOnceBeforeDraw() override{
110        make_checkerboard();
111    }
112
113    void onDraw(SkCanvas* canvas) override {
114        void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
115            draw_bitmap, draw_path, draw_paint, draw_text
116        };
117
118        sk_sp<SkColorFilter> cf(SkColorFilter::MakeModeFilter(SK_ColorBLUE,
119                                                              SkBlendMode::kSrcIn));
120        SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
121                                         SkImageFilter::CropRect::kHasAll_CropEdge);
122        SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)),
123                                          SkImageFilter::CropRect::kHasAll_CropEdge);
124
125        sk_sp<SkImageFilter> offset(SkOffsetImageFilter::Make(SkIntToScalar(-10),
126                                                              SkIntToScalar(-10),
127                                                              nullptr));
128
129        sk_sp<SkImageFilter> cfOffset(SkColorFilterImageFilter::Make(cf, std::move(offset)));
130
131        sk_sp<SkImageFilter> erodeX(SkErodeImageFilter::Make(8, 0, nullptr, &cropRect));
132        sk_sp<SkImageFilter> erodeY(SkErodeImageFilter::Make(0, 8, nullptr, &cropRect));
133
134        sk_sp<SkImageFilter> filters[] = {
135            nullptr,
136            SkColorFilterImageFilter::Make(cf, nullptr, &cropRect),
137            SkBlurImageFilter::Make(0.0f, 0.0f, nullptr, &cropRect),
138            SkBlurImageFilter::Make(1.0f, 1.0f, nullptr, &cropRect),
139            SkBlurImageFilter::Make(8.0f, 0.0f, nullptr, &cropRect),
140            SkBlurImageFilter::Make(0.0f, 8.0f, nullptr, &cropRect),
141            SkBlurImageFilter::Make(8.0f, 8.0f, nullptr, &cropRect),
142            SkErodeImageFilter::Make(1, 1, nullptr, &cropRect),
143            SkErodeImageFilter::Make(8, 0, std::move(erodeY), &cropRect),
144            SkErodeImageFilter::Make(0, 8, std::move(erodeX), &cropRect),
145            SkErodeImageFilter::Make(8, 8, nullptr, &cropRect),
146            SkMergeImageFilter::Make(nullptr,
147                                     std::move(cfOffset),
148                                     SkBlendMode::kSrcOver,
149                                     &cropRect),
150            SkBlurImageFilter::Make(8.0f, 8.0f, nullptr, &bogusRect),
151            SkColorFilterImageFilter::Make(cf, nullptr, &bogusRect),
152        };
153
154        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
155        SkScalar MARGIN = SkIntToScalar(16);
156        SkScalar DX = r.width() + MARGIN;
157        SkScalar DY = r.height() + MARGIN;
158
159        canvas->translate(MARGIN, MARGIN);
160        for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
161            canvas->save();
162            for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
163                SkPaint paint;
164                canvas->drawBitmap(fCheckerboard, 0, 0);
165                drawProc[j](canvas, r, filters[i]);
166                canvas->translate(0, DY);
167            }
168            canvas->restore();
169            canvas->translate(DX, 0);
170        }
171    }
172
173private:
174    SkBitmap fCheckerboard;
175    typedef GM INHERITED;
176};
177
178///////////////////////////////////////////////////////////////////////////////
179
180DEF_GM( return new ImageFiltersCroppedGM; )
181