1 /*
2 * Copyright 2012 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 "SkImageSource.h"
11 #include "SkMagnifierImageFilter.h"
12 #include "SkPixelRef.h"
13 #include "SkRandom.h"
14 #include "SkSurface.h"
15
16 #define WIDTH 500
17 #define HEIGHT 500
18
DEF_SIMPLE_GM_BG(imagemagnifier,canvas,WIDTH,HEIGHT,SK_ColorBLACK)19 DEF_SIMPLE_GM_BG(imagemagnifier, canvas, WIDTH, HEIGHT, SK_ColorBLACK) {
20 SkPaint filterPaint;
21 filterPaint.setImageFilter(
22 SkMagnifierImageFilter::Make(
23 SkRect::MakeXYWH(SkIntToScalar(100), SkIntToScalar(100),
24 SkIntToScalar(WIDTH / 2),
25 SkIntToScalar(HEIGHT / 2)),
26 100, nullptr));
27 canvas->saveLayer(nullptr, &filterPaint);
28 const char* str = "The quick brown fox jumped over the lazy dog.";
29 SkRandom rand;
30 SkFont font(sk_tool_utils::create_portable_typeface());
31 for (int i = 0; i < 25; ++i) {
32 int x = rand.nextULessThan(WIDTH);
33 int y = rand.nextULessThan(HEIGHT);
34 SkPaint paint;
35 paint.setColor(sk_tool_utils::color_to_565(rand.nextBits(24) | 0xFF000000));
36 font.setSize(rand.nextRangeScalar(0, 300));
37 canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint);
38 }
39 canvas->restore();
40 }
41
42 ////////////////////////////////////////////////////////////////////////////////
43 #define WIDTH_HEIGHT 256
44
make_img()45 static sk_sp<SkImage> make_img() {
46 SkBitmap bitmap;
47 bitmap.allocN32Pixels(WIDTH_HEIGHT, WIDTH_HEIGHT);
48 SkCanvas canvas(bitmap);
49
50 canvas.clear(0x0);
51
52 SkPaint paint;
53 paint.setColor(SK_ColorBLUE);
54
55 for (float pos = 0; pos < WIDTH_HEIGHT; pos += 16) {
56 canvas.drawLine(0, pos, SkIntToScalar(WIDTH_HEIGHT), pos, paint);
57 canvas.drawLine(pos, 0, pos, SkIntToScalar(WIDTH_HEIGHT), paint);
58 }
59
60 SkBitmap result;
61 result.setInfo(SkImageInfo::MakeS32(WIDTH_HEIGHT, WIDTH_HEIGHT, kPremul_SkAlphaType));
62 result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0);
63
64 return SkImage::MakeFromBitmap(result);
65 }
66
DEF_SIMPLE_GM_BG(imagemagnifier_cropped,canvas,WIDTH_HEIGHT,WIDTH_HEIGHT,SK_ColorBLACK)67 DEF_SIMPLE_GM_BG(imagemagnifier_cropped, canvas, WIDTH_HEIGHT, WIDTH_HEIGHT, SK_ColorBLACK) {
68
69 sk_sp<SkImage> image(make_img());
70
71 sk_sp<SkImageFilter> imageSource(SkImageSource::Make(std::move(image)));
72
73 SkRect srcRect = SkRect::MakeWH(SkIntToScalar(WIDTH_HEIGHT-32),
74 SkIntToScalar(WIDTH_HEIGHT-32));
75 srcRect.inset(64.0f, 64.0f);
76
77 constexpr SkScalar kInset = 64.0f;
78
79 // Crop out a 16 pixel ring around the result
80 const SkRect rect = SkRect::MakeXYWH(16, 16, WIDTH_HEIGHT-32, WIDTH_HEIGHT-32);
81 SkImageFilter::CropRect cropRect(rect);
82
83 SkPaint filterPaint;
84 filterPaint.setImageFilter(SkMagnifierImageFilter::Make(srcRect, kInset,
85 std::move(imageSource),
86 &cropRect));
87
88 canvas->saveLayer(nullptr, &filterPaint);
89 canvas->restore();
90 }
91