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 "SkColorFilterImageFilter.h"
16#include "SkTestImageFilters.h"
17
18///////////////////////////////////////////////////////////////////////////////
19
20static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
21    SkPaint paint;
22    paint.setImageFilter(imf);
23    paint.setColor(SK_ColorBLACK);
24    canvas->save();
25    canvas->clipRect(r);
26    canvas->drawPaint(paint);
27    canvas->restore();
28}
29
30static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
31    SkPaint paint;
32    paint.setColor(SK_ColorMAGENTA);
33    paint.setImageFilter(imf);
34    paint.setAntiAlias(true);
35    canvas->save();
36    canvas->clipRect(r);
37    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
38    canvas->restore();
39}
40
41static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
42    SkPaint paint;
43    paint.setImageFilter(imf);
44    paint.setColor(SK_ColorGREEN);
45    paint.setAntiAlias(true);
46    paint.setTextSize(r.height()/2);
47    paint.setTextAlign(SkPaint::kCenter_Align);
48    canvas->save();
49    canvas->clipRect(r);
50    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
51    canvas->restore();
52}
53
54static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
55    SkPaint paint;
56
57    SkIRect bounds;
58    r.roundOut(&bounds);
59
60    SkBitmap bm;
61    bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
62    bm.allocPixels();
63    bm.eraseColor(SK_ColorTRANSPARENT);
64    SkCanvas c(bm);
65    draw_path(&c, r, NULL);
66
67    paint.setImageFilter(imf);
68    canvas->save();
69    canvas->clipRect(r);
70    canvas->drawBitmap(bm, 0, 0, &paint);
71    canvas->restore();
72}
73
74static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
75    SkPaint paint;
76
77    SkIRect bounds;
78    r.roundOut(&bounds);
79
80    SkBitmap bm;
81    bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
82    bm.allocPixels();
83    bm.eraseColor(SK_ColorRED);
84    SkCanvas c(bm);
85
86    SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
87    paint.setColor(SK_ColorGREEN);
88    c.drawRect(SkRect::Make(cropRect), paint);
89
90    paint.setImageFilter(imf);
91    SkPoint loc = { r.fLeft, r.fTop };
92    canvas->getTotalMatrix().mapPoints(&loc, 1);
93    canvas->drawSprite(bm,
94                       SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
95                       &paint);
96}
97
98///////////////////////////////////////////////////////////////////////////////
99
100class ImageFiltersCroppedGM : public skiagm::GM {
101public:
102    ImageFiltersCroppedGM () {}
103
104protected:
105
106    virtual SkString onShortName() {
107        return SkString("imagefilterscropped");
108    }
109
110    virtual SkISize onISize() { return SkISize::Make(400, 640); }
111
112    void draw_frame(SkCanvas* canvas, const SkRect& r) {
113        SkPaint paint;
114        paint.setStyle(SkPaint::kStroke_Style);
115        paint.setColor(SK_ColorRED);
116        canvas->drawRect(r, paint);
117    }
118
119    virtual uint32_t onGetFlags() const {
120        // Because of the use of drawSprite, this test is excluded
121        // from scaled replay tests because drawSprite ignores the
122        // reciprocal scale that is applied at record time, which is
123        // the intended behavior of drawSprite.
124        return kSkipScaledReplay_Flag;
125    }
126
127    virtual void onDraw(SkCanvas* canvas) {
128        void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
129            draw_sprite, draw_bitmap, draw_path, draw_paint, draw_text
130        };
131
132        SkColorFilter* cf = SkColorFilter::CreateModeFilter(SK_ColorRED,
133                                                     SkXfermode::kSrcIn_Mode);
134        SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
135        SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10);
136
137        SkImageFilter* filters[] = {
138            NULL,
139            SkColorFilterImageFilter::Create(cf, NULL, &cropRect),
140            new SkBlurImageFilter(1.0f, 1.0f, NULL, &cropRect),
141            new SkBlurImageFilter(8.0f, 0.0f, NULL, &cropRect),
142            new SkBlurImageFilter(0.0f, 8.0f, NULL, &cropRect),
143            new SkBlurImageFilter(8.0f, 8.0f, NULL, &cropRect),
144            new SkBlurImageFilter(8.0f, 8.0f, NULL, &bogusRect),
145            SkColorFilterImageFilter::Create(cf, NULL, &bogusRect),
146        };
147        cf->unref();
148
149        SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
150        SkScalar MARGIN = SkIntToScalar(16);
151        SkScalar DX = r.width() + MARGIN;
152        SkScalar DY = r.height() + MARGIN;
153
154        canvas->translate(MARGIN, MARGIN);
155        for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
156            canvas->save();
157            for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
158                drawProc[j](canvas, r, filters[i]);
159                canvas->translate(0, DY);
160            }
161            canvas->restore();
162            canvas->translate(DX, 0);
163        }
164
165        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
166            SkSafeUnref(filters[j]);
167        }
168    }
169
170private:
171    typedef GM INHERITED;
172};
173
174///////////////////////////////////////////////////////////////////////////////
175
176static skiagm::GM* MyFactory(void*) { return new ImageFiltersCroppedGM; }
177static skiagm::GMRegistry reg(MyFactory);
178