aboutsummaryrefslogtreecommitdiffhomepage
path: root/gm/imagefiltersbase.cpp
blob: a55328a999fd2489e9c463f0e03a2531ff8a6380 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "gm.h"
#include "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkColorPriv.h"
#include "SkShader.h"

#include "SkBlurImageFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkDropShadowImageFilter.h"
#include "SkTestImageFilters.h"

class FailImageFilter : public SkImageFilter {
public:
    class Registrar {
    public:
        Registrar() {
            SkFlattenable::Register("FailImageFilter",
                                    FailImageFilter::CreateProc,
                                    FailImageFilter::GetFlattenableType());
        }
    };
    static FailImageFilter* Create() { return new FailImageFilter; }

    SK_TO_STRING_OVERRIDE()
    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(FailImageFilter)

protected:
    FailImageFilter() : INHERITED(0, nullptr) {}

    bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&,
                                 SkBitmap* result, SkIPoint* offset) const override {
        return false;
    }

private:
    typedef SkImageFilter INHERITED;
};

static FailImageFilter::Registrar gReg0;

SkFlattenable* FailImageFilter::CreateProc(SkReadBuffer& buffer) {
    SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
    return FailImageFilter::Create();
}

#ifndef SK_IGNORE_TO_STRING
void FailImageFilter::toString(SkString* str) const {
    str->appendf("FailImageFilter: (");
    str->append(")");
}
#endif

class IdentityImageFilter : public SkImageFilter {
public:
    class Registrar {
    public:
        Registrar() {
            SkFlattenable::Register("IdentityImageFilter",
                                    IdentityImageFilter::CreateProc,
                                    IdentityImageFilter::GetFlattenableType());
        }
    };
    static IdentityImageFilter* Create(SkImageFilter* input = nullptr) {
        return new IdentityImageFilter(input);
    }

    SK_TO_STRING_OVERRIDE()
    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(IdentityImageFilter)
protected:
    IdentityImageFilter(SkImageFilter* input) : INHERITED(1, &input) {}

    bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&,
                                 SkBitmap* result, SkIPoint* offset) const override {
        *result = src;
        offset->set(0, 0);
        return true;
    }

private:
    typedef SkImageFilter INHERITED;
};

static IdentityImageFilter::Registrar gReg1;

SkFlattenable* IdentityImageFilter::CreateProc(SkReadBuffer& buffer) {
    SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
    return IdentityImageFilter::Create(common.getInput(0));
}

#ifndef SK_IGNORE_TO_STRING
void IdentityImageFilter::toString(SkString* str) const {
    str->appendf("IdentityImageFilter: (");
    str->append(")");
}
#endif

///////////////////////////////////////////////////////////////////////////////

static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setImageFilter(imf);
    paint.setColor(SK_ColorGREEN);
    canvas->save();
    canvas->clipRect(r);
    canvas->drawPaint(paint);
    canvas->restore();
}

static void draw_line(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setColor(SK_ColorBLUE);
    paint.setImageFilter(imf);
    paint.setStrokeWidth(r.width()/10);
    canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
}

static void draw_rect(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setColor(SK_ColorYELLOW);
    paint.setImageFilter(imf);
    SkRect rr(r);
    rr.inset(r.width()/10, r.height()/10);
    canvas->drawRect(rr, paint);
}

static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setColor(SK_ColorMAGENTA);
    paint.setImageFilter(imf);
    paint.setAntiAlias(true);
    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
}

static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setImageFilter(imf);
    paint.setColor(SK_ColorCYAN);
    paint.setAntiAlias(true);
    sk_tool_utils::set_portable_typeface(&paint);
    paint.setTextSize(r.height()/2);
    paint.setTextAlign(SkPaint::kCenter_Align);
    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
}

static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
    SkPaint paint;
    paint.setImageFilter(imf);

    SkIRect bounds;
    r.roundOut(&bounds);

    SkBitmap bm;
    bm.allocN32Pixels(bounds.width(), bounds.height());
    bm.eraseColor(SK_ColorTRANSPARENT);
    SkCanvas c(bm);
    draw_path(&c, r, nullptr);

    canvas->drawBitmap(bm, 0, 0, &paint);
}

///////////////////////////////////////////////////////////////////////////////

class ImageFiltersBaseGM : public skiagm::GM {
public:
    ImageFiltersBaseGM () {}

protected:
    SkString onShortName() override {
        return SkString("imagefiltersbase");
    }

    SkISize onISize() override { return SkISize::Make(700, 500); }

    void draw_frame(SkCanvas* canvas, const SkRect& r) {
        SkPaint paint;
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setColor(SK_ColorRED);
        canvas->drawRect(r, paint);
    }

    void onDraw(SkCanvas* canvas) override {
        void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
            draw_paint,
            draw_line, draw_rect, draw_path, draw_text,
            draw_bitmap,
        };

        SkColorFilter* cf = SkColorFilter::CreateModeFilter(SK_ColorRED,
                                                     SkXfermode::kSrcIn_Mode);
        SkImageFilter* filters[] = {
            nullptr,
            IdentityImageFilter::Create(),
            FailImageFilter::Create(),
            SkColorFilterImageFilter::Create(cf),
            SkBlurImageFilter::Create(12.0f, 0.0f),
            SkDropShadowImageFilter::Create(10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE,
                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
        };
        cf->unref();

        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
        SkScalar MARGIN = SkIntToScalar(16);
        SkScalar DX = r.width() + MARGIN;
        SkScalar DY = r.height() + MARGIN;

        canvas->translate(MARGIN, MARGIN);
        for (size_t i = 0; i < SK_ARRAY_COUNT(drawProc); ++i) {
            canvas->save();
            for (size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
                drawProc[i](canvas, r, filters[j]);

                draw_frame(canvas, r);
                canvas->translate(0, DY);
            }
            canvas->restore();
            canvas->translate(DX, 0);
        }

        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
            SkSafeUnref(filters[j]);
        }
    }

private:
    typedef GM INHERITED;
};
DEF_GM( return new ImageFiltersBaseGM; )

///////////////////////////////////////////////////////////////////////////////

/*
 *  Want to test combos of filter and LCD text, to be sure we disable LCD in the presence of
 *  a filter.
 */
class ImageFiltersTextBaseGM : public skiagm::GM {
    SkString fSuffix;
public:
    ImageFiltersTextBaseGM(const char suffix[]) : fSuffix(suffix) {}

protected:
    SkString onShortName() override {
        SkString name;
        name.printf("%s_%s", "textfilter", fSuffix.c_str());
        return name;
    }

    SkISize onISize() override { return SkISize::Make(512, 342); }

    void drawWaterfall(SkCanvas* canvas, const SkPaint& origPaint) {
        const uint32_t flags[] = {
            0,
            SkPaint::kAntiAlias_Flag,
            SkPaint::kAntiAlias_Flag | SkPaint::kLCDRenderText_Flag,
        };
        SkPaint paint(origPaint);
        sk_tool_utils::set_portable_typeface(&paint);
        paint.setTextSize(30);

        SkAutoCanvasRestore acr(canvas, true);
        for (size_t i = 0; i < SK_ARRAY_COUNT(flags); ++i) {
            paint.setFlags(flags[i]);
            canvas->drawText("Hamburgefons", 11, 0, 0, paint);
            canvas->translate(0, 40);
        }
    }

    virtual void installFilter(SkPaint* paint) = 0;

    void onDraw(SkCanvas* canvas) override {
        SkPaint paint;

        canvas->translate(20, 40);

        for (int doSaveLayer = 0; doSaveLayer <= 1; ++doSaveLayer) {
            SkAutoCanvasRestore acr(canvas, true);
            for (int useFilter = 0; useFilter <= 1; ++useFilter) {
                SkAutoCanvasRestore acr2(canvas, true);

                SkPaint paint;
                if (useFilter) {
                    this->installFilter(&paint);
                }
                if (doSaveLayer) {
                    canvas->saveLayer(nullptr, &paint);
                    paint.setImageFilter(nullptr);
                }
                this->drawWaterfall(canvas, paint);

                acr2.restore();
                canvas->translate(250, 0);
            }
            acr.restore();
            canvas->translate(0, 200);
        }
    }
    
private:
    typedef GM INHERITED;
};

class ImageFiltersText_IF : public ImageFiltersTextBaseGM {
public:
    ImageFiltersText_IF() : ImageFiltersTextBaseGM("image") {}

    void installFilter(SkPaint* paint) override {
        paint->setImageFilter(SkBlurImageFilter::Create(1.5f, 1.5f))->unref();
    }
};
DEF_GM( return new ImageFiltersText_IF; )

class ImageFiltersText_CF : public ImageFiltersTextBaseGM {
public:
    ImageFiltersText_CF() : ImageFiltersTextBaseGM("color") {}

    void installFilter(SkPaint* paint) override {
        paint->setColorFilter(SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode))->unref();
    }
};
DEF_GM( return new ImageFiltersText_CF; )