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/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkFont.h"
12 #include "include/core/SkImageFilter.h"
13 #include "include/core/SkImageInfo.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkPixelRef.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkRefCnt.h"
18 #include "include/core/SkScalar.h"
19 #include "include/effects/SkImageFilters.h"
20 #include "include/effects/SkRuntimeEffect.h"
21 #include "src/base/SkRandom.h"
22 #include "tools/DecodeUtils.h"
23 #include "tools/Resources.h"
24 #include "tools/ToolUtils.h"
25 #include "tools/fonts/FontToolUtils.h"
26
27 #include <string_view>
28
make_filter()29 static sk_sp<SkImageFilter> make_filter() {
30 sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
31 uniform shader child;
32 half4 main(float2 coord) {
33 coord.x += sin(coord.y / 3) * 4;
34 return child.eval(coord);
35 }
36 )")).effect;
37 SkRuntimeShaderBuilder builder(std::move(effect));
38 return SkImageFilters::RuntimeShader(builder,
39 /*sampleRadius=*/4,
40 /*childShaderName=*/"",
41 /*input=*/nullptr);
42 }
43
44 DEF_SIMPLE_GM_BG(rtif_distort, canvas, 500, 750, SK_ColorBLACK) {
45 SkRect clip = SkRect::MakeWH(250, 250);
46 SkPaint filterPaint;
47 filterPaint.setImageFilter(make_filter());
48
__anon90c560ff0102(SkScalar tx, SkScalar ty, SkMatrix m) 49 auto draw_layer = [&](SkScalar tx, SkScalar ty, SkMatrix m) {
50 canvas->save();
51 canvas->translate(tx, ty);
52 canvas->clipRect(clip);
53 canvas->concat(m);
54 canvas->saveLayer(nullptr, &filterPaint);
55 const char* str = "The quick brown fox jumped over the lazy dog.";
56 SkRandom rand;
57 SkFont font = ToolUtils::DefaultPortableFont();
58 for (int i = 0; i < 25; ++i) {
59 int x = rand.nextULessThan(500);
60 int y = rand.nextULessThan(500);
61 SkPaint paint;
62 paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000));
63 font.setSize(rand.nextRangeScalar(0, 300));
64 canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint);
65 }
66 canvas->restore();
67 canvas->restore();
68 };
69
70 draw_layer( 0, 0, SkMatrix::I());
71 draw_layer(250, 0, SkMatrix::Scale(0.5f, 0.5f));
72 draw_layer( 0, 250, SkMatrix::RotateDeg(45, {125, 125}));
73 draw_layer(250, 250, SkMatrix::Scale(0.5f, 0.5f) * SkMatrix::RotateDeg(45, {125, 125}));
74 draw_layer( 0, 500, SkMatrix::Skew(-0.5f, 0));
75 SkMatrix p = SkMatrix::I();
76 p.setPerspX(0.0015f);
77 p.setPerspY(-0.0015f);
78 draw_layer(250, 500, p);
79 }
80
81 DEF_SIMPLE_GM(rtif_unsharp, canvas, 512, 256) {
82 // Similar to "unsharp_rt", which does the entire unsharp filter in a single shader. This uses
83 // the image filter DAG to compute the blurred version, then does the weighted subtraction.
84 sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
85 uniform shader content;
86 uniform shader blurred;
87 vec4 main(vec2 coord) {
88 vec4 c = content.eval(coord);
89 vec4 b = blurred.eval(coord);
90 return c + (c - b) * 4;
91 }
92 )")).effect;
93 SkRuntimeShaderBuilder builder(std::move(effect));
94
95 auto image = ToolUtils::GetResourceAsImage("images/mandrill_256.png");
96 auto blurredSrc = SkImageFilters::Blur(1, 1, /*input=*/nullptr);
97
98 std::string_view childNames[] = { "content", "blurred" };
99 sk_sp<SkImageFilter> childNodes[] = { nullptr, blurredSrc };
100
101 auto sharpened = SkImageFilters::RuntimeShader(builder, childNames, childNodes, 2);
102
103 canvas->drawImage(image, 0, 0);
104 canvas->translate(256, 0);
105
106 SkPaint paint;
107 paint.setImageFilter(sharpened);
108 canvas->saveLayer({ 0, 0, 256, 256 }, &paint);
109 canvas->drawImage(image, 0, 0);
110 canvas->restore();
111 }
112
