1 /*
2 * Copyright 2015 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 "SkBlurImageFilter.h"
10 #include "SkColorMatrixFilter.h"
11 #include "SkImage.h"
12 #include "SkImageFilter.h"
13 #include "SkSurface.h"
14 #include "sk_tool_utils.h"
15
16 /**
17 * Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see
18 * that we apply the xfermode *after* the image has been created and filtered, and not during
19 * the creation step (i.e. before it is filtered).
20 *
21 * see https://bug.skia.org/3741
22 */
do_draw(SkCanvas * canvas,SkBlendMode mode,sk_sp<SkImageFilter> imf)23 static void do_draw(SkCanvas* canvas, SkBlendMode mode, sk_sp<SkImageFilter> imf) {
24 SkAutoCanvasRestore acr(canvas, true);
25 canvas->clipRect(SkRect::MakeWH(220, 220));
26
27 // want to force a layer, so modes like DstIn can combine meaningfully, but the final
28 // image can still be shown against our default (opaque) background. non-opaque GMs
29 // are a lot more trouble to compare/triage.
30 canvas->saveLayer(nullptr, nullptr);
31 canvas->drawColor(SK_ColorGREEN);
32
33 SkPaint paint;
34 paint.setAntiAlias(true);
35
36 SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100);
37 SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200);
38
39 paint.setColor(SK_ColorRED);
40 canvas->drawOval(r0, paint);
41
42 paint.setColor(0x660000FF);
43 paint.setImageFilter(std::move(imf));
44 paint.setBlendMode(mode);
45 canvas->drawOval(r1, paint);
46 }
47
48 DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) {
49 canvas->translate(10, 10);
50
51 // just need an imagefilter to trigger the code-path (which creates a tmp layer)
52 sk_sp<SkImageFilter> imf(SkImageFilter::MakeMatrixFilter(SkMatrix::I(),
53 kNone_SkFilterQuality,
54 nullptr));
55
56 const SkBlendMode modes[] = {
57 SkBlendMode::kSrcATop, SkBlendMode::kDstIn
58 };
59
60 for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
61 canvas->save();
62 do_draw(canvas, modes[i], nullptr);
63 canvas->translate(240, 0);
64 do_draw(canvas, modes[i], imf);
65 canvas->restore();
66
67 canvas->translate(0, 240);
68 }
69 }
70
make_image(SkCanvas * canvas)71 static sk_sp<SkImage> make_image(SkCanvas* canvas) {
72 const SkImageInfo info = SkImageInfo::MakeS32(100, 100, kPremul_SkAlphaType);
73 auto surface(sk_tool_utils::makeSurface(canvas, info));
74 surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint());
75 return surface->makeImageSnapshot();
76 }
77
78 // Compare blurs when we're tightly clipped (fast) and not as tightly (slower)
79 //
80 // Expect the two to draw the same (modulo the extra border of pixels when the clip is larger)
81 //
82 DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) {
83 sk_sp<SkImage> image(make_image(canvas));
84 const SkRect r = SkRect::MakeIWH(image->width(), image->height());
85
86 canvas->translate(10, 10);
87 for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) {
88 SkPaint paint;
89 paint.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
90
91 canvas->save();
92 // we outset the clip by 1, to fall out of the fast-case in drawImage
93 // i.e. the clip is larger than the image
94 for (SkScalar outset = 0; outset <= 1; ++outset) {
95 canvas->save();
96 canvas->clipRect(r.makeOutset(outset, outset));
97 canvas->drawImage(image, 0, 0, &paint);
98 canvas->restore();
99 canvas->translate(0, r.height() + 20);
100 }
101 canvas->restore();
102 canvas->translate(r.width() + 20, 0);
103 }
104 }
105
106 ///////////////////////////////////////////////////////////////////////////////////////////////////
107 #include "Resources.h"
108 #include "SkBlurImageFilter.h"
109 #include "SkMatrixConvolutionImageFilter.h"
110 #include "SkMorphologyImageFilter.h"
111 #include "SkColorMatrixFilter.h"
112 #include "SkColorFilterImageFilter.h"
113 #include "SkRRect.h"
114
draw_set(SkCanvas * canvas,sk_sp<SkImageFilter> filters[],int count)115 static void draw_set(SkCanvas* canvas, sk_sp<SkImageFilter> filters[], int count) {
116 const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200);
117 const SkScalar offset = 250;
118 SkScalar dx = 0, dy = 0;
119
120 for (int i = 0; i < count; ++i) {
121 canvas->save();
122 SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20);
123 canvas->clipRRect(rr, true);
124 canvas->saveLayer({ &rr.getBounds(), nullptr, filters[i].get(), nullptr, nullptr, 0 });
125 canvas->drawColor(0x40FFFFFF);
126 canvas->restore();
127 canvas->restore();
128
129 if (0 == dx) {
130 dx = offset;
131 } else {
132 dx = 0;
133 dy = offset;
134 }
135 }
136 }
137
138 DEF_SIMPLE_GM(savelayer_with_backdrop, canvas, 830, 550) {
139 SkColorMatrix cm;
140 cm.setSaturation(10);
141 sk_sp<SkColorFilter> cf(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat));
142 const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 };
143 sk_sp<SkImageFilter> filters[] = {
144 SkBlurImageFilter::Make(10, 10, nullptr),
145 SkDilateImageFilter::Make(8, 8, nullptr),
146 SkMatrixConvolutionImageFilter::Make(
147 { 3, 3 }, kernel, 1, 0, { 0, 0 },
148 SkMatrixConvolutionImageFilter::kClampToBlack_TileMode,
149 true, nullptr),
150 SkColorFilterImageFilter::Make(std::move(cf), nullptr),
151 };
152
153 const struct {
154 SkScalar fSx, fSy, fTx, fTy;
155 } xforms[] = {
156 { 1, 1, 0, 0 },
157 { 0.5f, 0.5f, 530, 0 },
158 { 0.25f, 0.25f, 530, 275 },
159 { 0.125f, 0.125f, 530, 420 },
160 };
161
162 SkPaint paint;
163 paint.setFilterQuality(kMedium_SkFilterQuality);
164 sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png"));
165
166 canvas->translate(20, 20);
167 for (const auto& xform : xforms) {
168 canvas->save();
169 canvas->translate(xform.fTx, xform.fTy);
170 canvas->scale(xform.fSx, xform.fSy);
171 canvas->drawImage(image, 0, 0, &paint);
172 draw_set(canvas, filters, SK_ARRAY_COUNT(filters));
173 canvas->restore();
174 }
175 }
176
