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 "SkMergeImageFilter.h"
17#include "SkOffsetImageFilter.h"
18#include "SkTestImageFilters.h"
19
20///////////////////////////////////////////////////////////////////////////////
21
22static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
23    SkPaint paint;
24    paint.setImageFilter(imf);
25    paint.setColor(SK_ColorBLACK);
26    canvas->save();
27    canvas->clipRect(r);
28    canvas->drawPaint(paint);
29    canvas->restore();
30}
31
32static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
33    SkPaint paint;
34    paint.setColor(SK_ColorMAGENTA);
35    paint.setImageFilter(imf);
36    paint.setAntiAlias(true);
37    canvas->save();
38    canvas->clipRect(r);
39    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
40    canvas->restore();
41}
42
43static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
44    SkPaint paint;
45    paint.setImageFilter(imf);
46    paint.setColor(SK_ColorGREEN);
47    paint.setAntiAlias(true);
48    sk_tool_utils::set_portable_typeface(&paint);
49    paint.setTextSize(r.height()/2);
50    paint.setTextAlign(SkPaint::kCenter_Align);
51    canvas->save();
52    canvas->clipRect(r);
53    canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
54    canvas->restore();
55}
56
57static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
58    SkPaint paint;
59
60    SkIRect bounds;
61    r.roundOut(&bounds);
62
63    SkBitmap bm;
64    bm.allocN32Pixels(bounds.width(), bounds.height());
65    bm.eraseColor(SK_ColorTRANSPARENT);
66    SkCanvas c(bm);
67    draw_path(&c, r, NULL);
68
69    paint.setImageFilter(imf);
70    canvas->save();
71    canvas->clipRect(r);
72    canvas->drawBitmap(bm, 0, 0, &paint);
73    canvas->restore();
74}
75
76static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
77    SkPaint paint;
78
79    SkIRect bounds;
80    r.roundOut(&bounds);
81
82    SkBitmap bm;
83    bm.allocN32Pixels(bounds.width(), bounds.height());
84    bm.eraseColor(SK_ColorRED);
85    SkCanvas c(bm);
86
87    SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
88    paint.setColor(SK_ColorGREEN);
89    c.drawRect(SkRect::Make(cropRect), paint);
90
91    paint.setImageFilter(imf);
92    SkPoint loc = { r.fLeft, r.fTop };
93    canvas->getTotalMatrix().mapPoints(&loc, 1);
94    canvas->drawSprite(bm,
95                       SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
96                       &paint);
97}
98
99///////////////////////////////////////////////////////////////////////////////
100
101class ImageFiltersCroppedGM : public skiagm::GM {
102public:
103    ImageFiltersCroppedGM () {}
104
105protected:
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 | kSkipTiled_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        SkAutoTUnref<SkColorFilter> cf(
133            SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
134        SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)), SkImageFilter::CropRect::kHasAll_CropEdge);
135        SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)), SkImageFilter::CropRect::kHasAll_CropEdge);
136
137        SkAutoTUnref<SkImageFilter> offset(SkOffsetImageFilter::Create(
138            SkIntToScalar(-10), SkIntToScalar(-10)));
139
140        SkAutoTUnref<SkImageFilter> cfOffset(SkColorFilterImageFilter::Create(cf.get(), offset.get()));
141
142        SkImageFilter* filters[] = {
143            NULL,
144            SkColorFilterImageFilter::Create(cf.get(), NULL, &cropRect),
145            SkBlurImageFilter::Create(1.0f, 1.0f, NULL, &cropRect),
146            SkBlurImageFilter::Create(8.0f, 0.0f, NULL, &cropRect),
147            SkBlurImageFilter::Create(0.0f, 8.0f, NULL, &cropRect),
148            SkBlurImageFilter::Create(8.0f, 8.0f, NULL, &cropRect),
149            SkMergeImageFilter::Create(NULL, cfOffset.get(), SkXfermode::kSrcOver_Mode, &cropRect),
150            SkBlurImageFilter::Create(8.0f, 8.0f, NULL, &bogusRect),
151            SkColorFilterImageFilter::Create(cf.get(), NULL, &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                drawProc[j](canvas, r, filters[i]);
164                canvas->translate(0, DY);
165            }
166            canvas->restore();
167            canvas->translate(DX, 0);
168        }
169
170        for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
171            SkSafeUnref(filters[j]);
172        }
173    }
174
175private:
176    typedef GM INHERITED;
177};
178
179///////////////////////////////////////////////////////////////////////////////
180
181static skiagm::GM* MyFactory(void*) { return new ImageFiltersCroppedGM; }
182static skiagm::GMRegistry reg(MyFactory);
183