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/SkBlendMode.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkColorFilter.h"
13 #include "include/core/SkImage.h"
14 #include "include/core/SkImageFilter.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkPoint.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkScalar.h"
20 #include "include/core/SkShader.h"
21 #include "include/core/SkTileMode.h"
22 #include "include/effects/SkColorMatrix.h"
23 #include "include/effects/SkGradientShader.h"
24 #include "include/effects/SkImageFilters.h"
25 #include "include/private/SkTArray.h"
26 #include "include/private/SkTDArray.h"
27 #include "tools/Resources.h"
28
29 #include <string.h>
30 #include <utility>
31
32 #define FILTER_WIDTH SkIntToScalar(30)
33 #define FILTER_HEIGHT SkIntToScalar(30)
34 #define MARGIN SkIntToScalar(10)
35
cf_make_brightness(float brightness)36 static sk_sp<SkColorFilter> cf_make_brightness(float brightness) {
37 float matrix[20] = {
38 1, 0, 0, 0, brightness,
39 0, 1, 0, 0, brightness,
40 0, 0, 1, 0, brightness,
41 0, 0, 0, 1, 0 };
42 return SkColorFilters::Matrix(matrix);
43 }
44
cf_make_grayscale()45 static sk_sp<SkColorFilter> cf_make_grayscale() {
46 float matrix[20];
47 memset(matrix, 0, 20 * sizeof(float));
48 matrix[0] = matrix[5] = matrix[10] = 0.2126f;
49 matrix[1] = matrix[6] = matrix[11] = 0.7152f;
50 matrix[2] = matrix[7] = matrix[12] = 0.0722f;
51 matrix[18] = 1.0f;
52 return SkColorFilters::Matrix(matrix);
53 }
54
cf_make_colorize(SkColor color)55 static sk_sp<SkColorFilter> cf_make_colorize(SkColor color) {
56 return SkColorFilters::Blend(color, SkBlendMode::kSrc);
57 }
58
sk_gm_get_colorfilters(SkTArray<sk_sp<SkColorFilter>> * array)59 static void sk_gm_get_colorfilters(SkTArray<sk_sp<SkColorFilter>>* array) {
60 array->push_back(cf_make_brightness(0.5f));
61 array->push_back(cf_make_grayscale());
62 array->push_back(cf_make_colorize(SK_ColorBLUE));
63 }
64
65 ///////////////////////////////////////////////////////////////////////////////////////////////////
66
sh_make_lineargradient0()67 static sk_sp<SkShader> sh_make_lineargradient0() {
68 const SkPoint pts[] = { { 0, 0 }, { 100, 100 } };
69 const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
70 return SkGradientShader::MakeLinear(pts, colors, nullptr, 3, SkTileMode::kRepeat);
71 }
72
sh_make_lineargradient1()73 static sk_sp<SkShader> sh_make_lineargradient1() {
74 const SkPoint pts[] = { { 0, 0 }, { 100, 100 } };
75 const SkColor colors[] = { SK_ColorRED, 0x0000FF00, SK_ColorBLUE };
76 return SkGradientShader::MakeLinear(pts, colors, nullptr, 3, SkTileMode::kRepeat);
77 }
78
sh_make_image()79 static sk_sp<SkShader> sh_make_image() {
80 sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_128.png"));
81 if (!image) {
82 return nullptr;
83 }
84 return image->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat);
85 }
86
sk_gm_get_shaders(SkTDArray<SkShader * > * array)87 static void sk_gm_get_shaders(SkTDArray<SkShader*>* array) {
88 if (auto shader = sh_make_lineargradient0()) {
89 *array->append() = shader.release();
90 }
91 if (auto shader = sh_make_lineargradient1()) {
92 *array->append() = shader.release();
93 }
94 if (auto shader = sh_make_image()) {
95 *array->append() = shader.release();
96 }
97 }
98
99 ///////////////////////////////////////////////////////////////////////////////////////////////////
100
make_blur(float amount,sk_sp<SkImageFilter> input)101 static sk_sp<SkImageFilter> make_blur(float amount, sk_sp<SkImageFilter> input) {
102 return SkImageFilters::Blur(amount, amount, std::move(input));
103 }
104
make_brightness(float amount,sk_sp<SkImageFilter> input)105 static sk_sp<SkImageFilter> make_brightness(float amount, sk_sp<SkImageFilter> input) {
106 return SkImageFilters::ColorFilter(cf_make_brightness(amount), std::move(input));
107 }
108
make_grayscale(sk_sp<SkImageFilter> input)109 static sk_sp<SkImageFilter> make_grayscale(sk_sp<SkImageFilter> input) {
110 return SkImageFilters::ColorFilter(cf_make_grayscale(), std::move(input));
111 }
112
make_mode_blue(sk_sp<SkImageFilter> input)113 static sk_sp<SkImageFilter> make_mode_blue(sk_sp<SkImageFilter> input) {
114 return SkImageFilters::ColorFilter(cf_make_colorize(SK_ColorBLUE), std::move(input));
115 }
116
draw_clipped_rect(SkCanvas * canvas,const SkRect & r,const SkPaint & paint,float outset=0.0f)117 static void draw_clipped_rect(SkCanvas* canvas,
118 const SkRect& r,
119 const SkPaint& paint,
120 float outset = 0.0f) {
121 canvas->save();
122 SkRect clip(r);
123 clip.outset(outset, outset);
124 canvas->clipRect(clip);
125 canvas->drawRect(r, paint);
126 canvas->restore();
127 }
128
129 DEF_SIMPLE_GM(colorfilterimagefilter, canvas, 400, 100){
130 SkRect r = SkRect::MakeWH(FILTER_WIDTH, FILTER_HEIGHT);
131 SkPaint paint;
132 paint.setColor(SK_ColorRED);
133 canvas->save();
134 for (float brightness = -1.0f; brightness <= 1.0f; brightness += 0.2f) {
135 sk_sp<SkImageFilter> dim(make_brightness(-brightness, nullptr));
136 sk_sp<SkImageFilter> bright(make_brightness(brightness, std::move(dim)));
137 paint.setImageFilter(std::move(bright));
138 draw_clipped_rect(canvas, r, paint);
139 canvas->translate(FILTER_WIDTH + MARGIN, 0);
140 }
141 canvas->restore();
142 canvas->translate(0, FILTER_HEIGHT + MARGIN);
143 {
144 sk_sp<SkImageFilter> brightness(make_brightness(0.9f, nullptr));
145 sk_sp<SkImageFilter> grayscale(make_grayscale(std::move(brightness)));
146 paint.setImageFilter(std::move(grayscale));
147 draw_clipped_rect(canvas, r, paint);
148 canvas->translate(FILTER_WIDTH + MARGIN, 0);
149 }
150 {
151 sk_sp<SkImageFilter> grayscale(make_grayscale(nullptr));
152 sk_sp<SkImageFilter> brightness(make_brightness(0.9f, std::move(grayscale)));
153 paint.setImageFilter(std::move(brightness));
154 draw_clipped_rect(canvas, r, paint);
155 canvas->translate(FILTER_WIDTH + MARGIN, 0);
156 }
157 {
158 sk_sp<SkImageFilter> blue(make_mode_blue(nullptr));
159 sk_sp<SkImageFilter> brightness(make_brightness(1.0f, std::move(blue)));
160 paint.setImageFilter(std::move(brightness));
161 draw_clipped_rect(canvas, r, paint);
162 canvas->translate(FILTER_WIDTH + MARGIN, 0);
163 }
164 {
165 sk_sp<SkImageFilter> brightness(make_brightness(1.0f, nullptr));
166 sk_sp<SkImageFilter> blue(make_mode_blue(std::move(brightness)));
167 paint.setImageFilter(std::move(blue));
168 draw_clipped_rect(canvas, r, paint);
169 canvas->translate(FILTER_WIDTH + MARGIN, 0);
170 }
171 {
172 sk_sp<SkImageFilter> blur(make_blur(3.0f, nullptr));
173 sk_sp<SkImageFilter> brightness(make_brightness(0.5f, std::move(blur)));
174 paint.setImageFilter(std::move(brightness));
175 draw_clipped_rect(canvas, r, paint, 3);
176 canvas->translate(FILTER_WIDTH + MARGIN, 0);
177 }
178 {
179 sk_sp<SkImageFilter> blue(make_mode_blue(nullptr));
180 paint.setImageFilter(std::move(blue));
181 draw_clipped_rect(canvas, r, paint, 5);
182 canvas->translate(FILTER_WIDTH + MARGIN, 0);
183 }
184 }
185
186 DEF_SIMPLE_GM(colorfilterimagefilter_layer, canvas, 32, 32) {
187 SkAutoCanvasRestore autoCanvasRestore(canvas, false);
188 SkColorMatrix cm;
189 cm.setSaturation(0.0f);
190 sk_sp<SkColorFilter> cf(SkColorFilters::Matrix(cm));
191 SkPaint p;
192 p.setImageFilter(SkImageFilters::ColorFilter(std::move(cf), nullptr));
193 canvas->saveLayer(nullptr, &p);
194 canvas->clear(SK_ColorRED);
195 }
196
197 ///////////////////////////////////////////////////////////////////////////////////////////////////
198
199 template <typename T> class SkTRefArray : public SkTDArray<T> {
200 public:
~SkTRefArray()201 ~SkTRefArray() { this->unrefAll(); }
202 };
203
204 DEF_SIMPLE_GM(colorfiltershader, canvas, 610, 610) {
205 SkTArray<sk_sp<SkColorFilter>> filters;
206 sk_gm_get_colorfilters(&filters);
207
208 SkTRefArray<SkShader*> shaders;
209 sk_gm_get_shaders(&shaders);
210
211 const SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
212 *shaders.append() = SkGradientShader::MakeTwoPointConical({0, 0}, 50, {0, 0}, 150,
213 colors, nullptr, 2,
214 SkTileMode::kClamp).release();
215
216 SkPaint paint;
217 SkRect r = SkRect::MakeWH(120, 120);
218
219 canvas->translate(20, 20);
220 for (int y = 0; y < shaders.count(); ++y) {
221 SkShader* shader = shaders[y];
222
223 canvas->save();
224 for (int x = -1; x < filters.count(); ++x) {
225 sk_sp<SkColorFilter> filter = x >= 0 ? filters[x] : nullptr;
226
227 paint.setShader(shader->makeWithColorFilter(filter));
228 canvas->drawRect(r, paint);
229 canvas->translate(150, 0);
230 }
231 canvas->restore();
232 canvas->translate(0, 150);
233 }
234 }
235
do_mixershader(SkCanvas * canvas,Maker && maker)236 template <typename Maker> void do_mixershader(SkCanvas* canvas, Maker&& maker) {
237 auto shaderA = GetResourceAsImage("images/mandrill_128.png")->makeShader(SkTileMode::kClamp,
238 SkTileMode::kClamp);
239 const SkColor colors[] = { SK_ColorGREEN, 0 };
240 auto shaderB = SkGradientShader::MakeRadial({60, 60}, 55, colors, nullptr, 2,
241 SkTileMode::kClamp,
242 SkGradientShader::kInterpolateColorsInPremul_Flag,
243 nullptr);
244 const SkBlendMode modes[] = {
245 SkBlendMode::kSrc, SkBlendMode::kModulate, SkBlendMode::kColorBurn, SkBlendMode::kPlus,
246 SkBlendMode::kDstATop,
247 };
248 SkPaint paint;
249 SkRect r = SkRect::MakeWH(120, 120);
250
251 canvas->translate(10, 10);
252 for (auto mode : modes) {
253 canvas->save();
254 const int count = 6;
255 for (int x = 0; x < count; ++x) {
256 const float t = x * 1.0f / (count - 1);
257 paint.setShader(maker(shaderA, shaderB, mode, t));
258 canvas->drawRect(r, paint);
259 canvas->translate(r.width() + 10, 0);
260 }
261 canvas->restore();
262 canvas->translate(0, r.height() + 20);
263 }
264 }
265
266 DEF_SIMPLE_GM(mixershader, canvas, 800, 700) {
__anon36a155f70102(sk_sp<SkShader> a, sk_sp<SkShader> b, SkBlendMode mode, float t) 267 do_mixershader(canvas, [](sk_sp<SkShader> a, sk_sp<SkShader> b, SkBlendMode mode, float t) {
268 auto sh = SkShaders::Blend(mode, a, b);
269 return SkShaders::Lerp(t, a, sh);
270 });
271 }
272
273 DEF_SIMPLE_GM(mixershader2, canvas, 800, 700) {
__anon36a155f70202(sk_sp<SkShader> a, sk_sp<SkShader> b, SkBlendMode mode, float t) 274 do_mixershader(canvas, [](sk_sp<SkShader> a, sk_sp<SkShader> b, SkBlendMode mode, float t) {
275 return SkShaders::Lerp(t, a, SkShaders::Blend(mode, a, b));
276 });
277 }
278