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displacement.cpp
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1/*
2 * Copyright 2013 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/SkBitmap.h"
10#include "include/core/SkCanvas.h"
11#include "include/core/SkColor.h"
12#include "include/core/SkImage.h"
13#include "include/core/SkImageFilter.h"
14#include "include/core/SkPaint.h"
15#include "include/core/SkRect.h"
16#include "include/core/SkRefCnt.h"
17#include "include/core/SkScalar.h"
18#include "include/core/SkSize.h"
19#include "include/core/SkString.h"
20#include "include/effects/SkImageFilters.h"
21#include "tools/ToolUtils.h"
22#include "tools/fonts/FontToolUtils.h"
23
24#include <utility>
25
26namespace skiagm {
27
28class DisplacementMapGM : public GM {
29public:
30 DisplacementMapGM() {
31 this->setBGColor(0xFF000000);
32 }
33
34protected:
35 SkString getName() const override { return SkString("displacement"); }
36
37 void onOnceBeforeDraw() override {
38 fImage = ToolUtils::CreateStringImage(80, 80, 0xFF884422, 15, 55, 96, "g");
39
40 SkColor c1 = ToolUtils::color_to_565(0xFF244484);
41 SkColor c2 = ToolUtils::color_to_565(0xFF804020);
42
43 fCheckerboard = ToolUtils::create_checkerboard_image(80, 80, c1, c2, 8);
44 fSmall = ToolUtils::create_checkerboard_image(64, 64, c1, c2, 8);
45 fLarge = ToolUtils::create_checkerboard_image(96, 96, c1, c2, 8);
46 fLargeW = ToolUtils::create_checkerboard_image(96, 64, c1, c2, 8);
47 fLargeH = ToolUtils::create_checkerboard_image(64, 96, c1, c2, 8);
48 }
49
50 SkISize getISize() override { return SkISize::Make(600, 500); }
51
52 void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) const {
53 canvas->save();
54 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
55 canvas->clipIRect(fImage->bounds());
56 canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint);
57 canvas->restore();
58 }
59
60 void onDraw(SkCanvas* canvas) override {
61 canvas->clear(SK_ColorBLACK);
62 SkPaint paint;
63 sk_sp<SkImageFilter> displ(SkImageFilters::Image(fCheckerboard, SkFilterMode::kLinear));
64 paint.setImageFilter(SkImageFilters::DisplacementMap(
65 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr));
66 this->drawClippedBitmap(canvas, 0, 0, paint);
67 paint.setImageFilter(SkImageFilters::DisplacementMap(
68 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr));
69 this->drawClippedBitmap(canvas, 100, 0, paint);
70 paint.setImageFilter(SkImageFilters::DisplacementMap(
71 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr));
72 this->drawClippedBitmap(canvas, 200, 0, paint);
73 paint.setImageFilter(SkImageFilters::DisplacementMap(
74 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr));
75 this->drawClippedBitmap(canvas, 300, 0, paint);
76 paint.setImageFilter(SkImageFilters::DisplacementMap(
77 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr));
78 this->drawClippedBitmap(canvas, 400, 0, paint);
79
80 paint.setImageFilter(SkImageFilters::DisplacementMap(
81 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr));
82 this->drawClippedBitmap(canvas, 0, 100, paint);
83 paint.setImageFilter(SkImageFilters::DisplacementMap(
84 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr));
85 this->drawClippedBitmap(canvas, 100, 100, paint);
86 paint.setImageFilter(SkImageFilters::DisplacementMap(
87 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr));
88 this->drawClippedBitmap(canvas, 200, 100, paint);
89 paint.setImageFilter(SkImageFilters::DisplacementMap(
90 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr));
91 this->drawClippedBitmap(canvas, 300, 100, paint);
92 paint.setImageFilter(SkImageFilters::DisplacementMap(
93 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr));
94 this->drawClippedBitmap(canvas, 400, 100, paint);
95
96 SkIRect cropRect = SkIRect::MakeXYWH(30, 30, 40, 40);
97 paint.setImageFilter(SkImageFilters::DisplacementMap(
98 SkColorChannel::kR, SkColorChannel::kG, 0.0f, displ, nullptr, &cropRect));
99 this->drawClippedBitmap(canvas, 0, 200, paint);
100 paint.setImageFilter(SkImageFilters::DisplacementMap(
101 SkColorChannel::kB, SkColorChannel::kA, 16.0f, displ, nullptr, &cropRect));
102 this->drawClippedBitmap(canvas, 100, 200, paint);
103 paint.setImageFilter(SkImageFilters::DisplacementMap(
104 SkColorChannel::kR, SkColorChannel::kB, 32.0f, displ, nullptr, &cropRect));
105 this->drawClippedBitmap(canvas, 200, 200, paint);
106 paint.setImageFilter(SkImageFilters::DisplacementMap(
107 SkColorChannel::kG, SkColorChannel::kA, 48.0f, displ, nullptr, &cropRect));
108 this->drawClippedBitmap(canvas, 300, 200, paint);
109 paint.setImageFilter(SkImageFilters::DisplacementMap(
110 SkColorChannel::kR, SkColorChannel::kA, 64.0f, displ, nullptr, &cropRect));
111 this->drawClippedBitmap(canvas, 400, 200, paint);
112
113 paint.setImageFilter(SkImageFilters::DisplacementMap(
114 SkColorChannel::kR, SkColorChannel::kG, 40.0f, displ, nullptr, &cropRect));
115 this->drawClippedBitmap(canvas, 0, 300, paint);
116 paint.setImageFilter(SkImageFilters::DisplacementMap(
117 SkColorChannel::kB, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect));
118 this->drawClippedBitmap(canvas, 100, 300, paint);
119 paint.setImageFilter(SkImageFilters::DisplacementMap(
120 SkColorChannel::kR, SkColorChannel::kB, 40.0f, displ, nullptr, &cropRect));
121 this->drawClippedBitmap(canvas, 200, 300, paint);
122 paint.setImageFilter(SkImageFilters::DisplacementMap(
123 SkColorChannel::kG, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect));
124 this->drawClippedBitmap(canvas, 300, 300, paint);
125 paint.setImageFilter(SkImageFilters::DisplacementMap(
126 SkColorChannel::kR, SkColorChannel::kA, 40.0f, displ, nullptr, &cropRect));
127 this->drawClippedBitmap(canvas, 400, 300, paint);
128
129 // Test for negative scale.
130 paint.setImageFilter(SkImageFilters::DisplacementMap(
131 SkColorChannel::kG, SkColorChannel::kA, -40.0f, displ, nullptr));
132 this->drawClippedBitmap(canvas, 500, 0, paint);
133
134 // Tests for images of different sizes
135 displ = SkImageFilters::Image(fSmall, SkFilterMode::kLinear);
136 paint.setImageFilter(SkImageFilters::DisplacementMap(
137 SkColorChannel::kR, SkColorChannel::kG, 40.0f, std::move(displ), nullptr));
138 this->drawClippedBitmap(canvas, 0, 400, paint);
139 displ = SkImageFilters::Image(fLarge, SkFilterMode::kLinear);
140 paint.setImageFilter(SkImageFilters::DisplacementMap(
141 SkColorChannel::kB, SkColorChannel::kA, 40.0f, std::move(displ), nullptr));
142 this->drawClippedBitmap(canvas, 100, 400, paint);
143 displ = SkImageFilters::Image(fLargeW, SkFilterMode::kLinear);
144 paint.setImageFilter(SkImageFilters::DisplacementMap(
145 SkColorChannel::kR, SkColorChannel::kB, 40.0f, std::move(displ), nullptr));
146 this->drawClippedBitmap(canvas, 200, 400, paint);
147 displ = SkImageFilters::Image(fLargeH, SkFilterMode::kLinear);
148 paint.setImageFilter(SkImageFilters::DisplacementMap(
149 SkColorChannel::kG, SkColorChannel::kA, 40.0f, std::move(displ), nullptr));
150 this->drawClippedBitmap(canvas, 300, 400, paint);
151
152 // Test for no given displacement input. In this case, both displacement
153 // and color should use the same bitmap, given to SkCanvas::drawBitmap()
154 // as an input argument.
155 paint.setImageFilter(SkImageFilters::DisplacementMap(
156 SkColorChannel::kG, SkColorChannel::kA, 40.0f, nullptr, nullptr));
157 this->drawClippedBitmap(canvas, 400, 400, paint);
158 }
159
160private:
161 sk_sp<SkImage> fImage;
162 sk_sp<SkImage> fCheckerboard, fSmall, fLarge, fLargeW, fLargeH;
163
164 using INHERITED = GM;
165};
166
167//////////////////////////////////////////////////////////////////////////////
168
169DEF_GM(return new DisplacementMapGM;)
170} // namespace skiagm
SkColor
uint32_t SkColor
Definition SkColor.h:37
SK_ColorBLACK
constexpr SkColor SK_ColorBLACK
Definition SkColor.h:103
SkIntToScalar
#define SkIntToScalar(x)
Definition SkScalar.h:57
SkCanvas::restore
void restore()
Definition SkCanvas.cpp:465
SkCanvas::translate
void translate(SkScalar dx, SkScalar dy)
Definition SkCanvas.cpp:1602
SkCanvas::clipIRect
void clipIRect(const SkIRect &irect, SkClipOp op=SkClipOp::kIntersect)
Definition SkCanvas.h:991
SkCanvas::clear
void clear(SkColor color)
Definition SkCanvas.h:1199
SkCanvas::save
int save()
Definition SkCanvas.cpp:451
SkCanvas::drawImage
void drawImage(const SkImage *image, SkScalar left, SkScalar top)
Definition SkCanvas.h:1528
SkImageFilters::DisplacementMap
static sk_sp< SkImageFilter > DisplacementMap(SkColorChannel xChannelSelector, SkColorChannel yChannelSelector, SkScalar scale, sk_sp< SkImageFilter > displacement, sk_sp< SkImageFilter > color, const CropRect &cropRect={})
Definition SkDisplacementMapImageFilter.cpp:144
SkImageFilters::Image
static sk_sp< SkImageFilter > Image(sk_sp< SkImage > image, const SkRect &srcRect, const SkRect &dstRect, const SkSamplingOptions &sampling)
Definition SkImageImageFilter.cpp:77
SkImage::bounds
SkIRect bounds() const
Definition SkImage.h:303
sk_sp
Definition SkRefCnt.h:220
skiagm::DisplacementMapGM::getISize
SkISize getISize() override
Definition displacement.cpp:50
skiagm::DisplacementMapGM::onOnceBeforeDraw
void onOnceBeforeDraw() override
Definition displacement.cpp:37
skiagm::DisplacementMapGM::onDraw
void onDraw(SkCanvas *canvas) override
Definition displacement.cpp:60
skiagm::DisplacementMapGM::drawClippedBitmap
void drawClippedBitmap(SkCanvas *canvas, int x, int y, const SkPaint &paint) const
Definition displacement.cpp:52
skiagm::DisplacementMapGM::getName
SkString getName() const override
Definition displacement.cpp:35
skiagm::GM::setBGColor
void setBGColor(SkColor)
Definition gm.cpp:159
paint
const Paint & paint
Definition color_source.cc:38
DEF_GM
#define DEF_GM(CODE)
Definition gm.h:40
y
double y
Definition mouse-input-test.cc:83
x
double x
Definition mouse-input-test.cc:82
ToolUtils::create_checkerboard_image
sk_sp< SkImage > create_checkerboard_image(int w, int h, SkColor c1, SkColor c2, int checkSize)
Definition ToolUtils.cpp:168
ToolUtils::CreateStringImage
sk_sp< SkImage > CreateStringImage(int w, int h, SkColor c, int x, int y, int textSize, const char *str)
Definition FontToolUtils.cpp:234
ToolUtils::color_to_565
SkColor color_to_565(SkColor color)
Definition ToolUtils.cpp:139
SkIRect::MakeXYWH
static constexpr SkIRect MakeXYWH(int32_t x, int32_t y, int32_t w, int32_t h)
Definition SkRect.h:104
SkISize::Make
static constexpr SkISize Make(int32_t w, int32_t h)
Definition SkSize.h:20
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