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
|
/*
* Copyright 2013 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 "sk_tool_utils.h"
#include "SkPictureImageFilter.h"
#include "SkPictureRecorder.h"
#include "SkImage.h"
#include "SkImageSource.h"
// This GM exercises the SkPictureImageFilter ImageFilter class.
static void fill_rect_filtered(SkCanvas* canvas,
const SkRect& clipRect,
sk_sp<SkImageFilter> filter) {
SkPaint paint;
paint.setImageFilter(filter);
canvas->save();
canvas->clipRect(clipRect);
canvas->drawPaint(paint);
canvas->restore();
}
static sk_sp<SkPicture> make_picture() {
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(100, 100, nullptr, 0);
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(0xFFFFFFFF);
paint.setTextSize(SkIntToScalar(96));
const char* str = "e";
canvas->drawString(str, SkIntToScalar(20), SkIntToScalar(70), paint);
return recorder.finishRecordingAsPicture();
}
// Create a picture that will draw LCD text
static sk_sp<SkPicture> make_LCD_picture() {
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(100, 100, nullptr, 0);
canvas->clear(SK_ColorTRANSPARENT);
SkPaint paint;
paint.setLCDRenderText(true); // want LCD
paint.setAntiAlias(true); // need AA for LCD
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(0xFFFFFFFF);
// this has to be small enough that it doesn't become a path
paint.setTextSize(SkIntToScalar(36));
const char* str = "e";
canvas->drawString(str, SkIntToScalar(20), SkIntToScalar(70), paint);
return recorder.finishRecordingAsPicture();
}
class PictureImageFilterGM : public skiagm::GM {
public:
PictureImageFilterGM() { }
protected:
SkString onShortName() override {
return SkString("pictureimagefilter");
}
SkISize onISize() override { return SkISize::Make(600, 300); }
void onOnceBeforeDraw() override {
fPicture = make_picture();
fLCDPicture = make_LCD_picture();
}
sk_sp<SkImageFilter> make(sk_sp<SkPicture> pic, SkRect r, SkFilterQuality fq) {
SkISize dim = { SkScalarRoundToInt(r.width()), SkScalarRoundToInt(r.height()) };
auto img = SkImage::MakeFromPicture(pic, dim, nullptr, nullptr,
SkImage::BitDepth::kU8, SkColorSpace::MakeSRGB());
return SkImageSource::Make(img, r, r, fq);
}
sk_sp<SkImageFilter> make(SkFilterQuality fq) {
return make(fPicture, fPicture->cullRect(), fq);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorGRAY);
{
SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
SkRect emptyRect = SkRect::MakeXYWH(20, 20, 0, 0);
SkRect bounds = SkRect::MakeXYWH(0, 0, 100, 100);
sk_sp<SkImageFilter> pictureSource(SkPictureImageFilter::Make(fPicture));
sk_sp<SkImageFilter> pictureSourceSrcRect(SkPictureImageFilter::Make(fPicture,
srcRect));
sk_sp<SkImageFilter> pictureSourceEmptyRect(SkPictureImageFilter::Make(fPicture,
emptyRect));
sk_sp<SkImageFilter> pictureSourceResampled = make(kLow_SkFilterQuality);
sk_sp<SkImageFilter> pictureSourcePixelated = make(kNone_SkFilterQuality);
canvas->save();
// Draw the picture unscaled.
fill_rect_filtered(canvas, bounds, pictureSource);
canvas->translate(SkIntToScalar(100), 0);
// Draw an unscaled subset of the source picture.
fill_rect_filtered(canvas, bounds, pictureSourceSrcRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw the picture to an empty rect (should draw nothing).
fill_rect_filtered(canvas, bounds, pictureSourceEmptyRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw the LCD picture to a layer
{
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, stroke);
SkPaint paint;
paint.setImageFilter(make(fLCDPicture, fPicture->cullRect(), kNone_SkFilterQuality));
canvas->scale(4, 4);
canvas->translate(-0.9f*srcRect.fLeft, -2.45f*srcRect.fTop);
canvas->saveLayerPreserveLCDTextRequests(&bounds, &paint);
canvas->restore();
}
canvas->restore();
// Draw the picture scaled
canvas->translate(0, SkIntToScalar(100));
canvas->scale(200 / srcRect.width(), 200 / srcRect.height());
canvas->translate(-srcRect.fLeft, -srcRect.fTop);
fill_rect_filtered(canvas, srcRect, pictureSource);
// Draw the picture scaled, but rasterized at original resolution
canvas->translate(srcRect.width(), 0);
fill_rect_filtered(canvas, srcRect, pictureSourceResampled);
// Draw the picture scaled, pixelated
canvas->translate(srcRect.width(), 0);
fill_rect_filtered(canvas, srcRect, pictureSourcePixelated);
}
}
private:
sk_sp<SkPicture> fPicture;
sk_sp<SkPicture> fLCDPicture;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new PictureImageFilterGM; )
|
