1 /*
2 * Copyright 2011 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 "SkCanvas.h"
11 #include "SkColorFilter.h"
12 #include "SkColorPriv.h"
13 #include "SkImageFilterPriv.h"
14 #include "SkShader.h"
15 #include "SkTextUtils.h"
16
17 #include "SkBlurImageFilter.h"
18 #include "SkColorFilterImageFilter.h"
19 #include "SkDropShadowImageFilter.h"
20 #include "SkSpecialImage.h"
21
22 class FailImageFilter : public SkImageFilter {
23 public:
Make()24 static sk_sp<SkImageFilter> Make() {
25 return sk_sp<SkImageFilter>(new FailImageFilter);
26 }
27
28 SK_FLATTENABLE_HOOKS(FailImageFilter)
29 protected:
FailImageFilter()30 FailImageFilter() : INHERITED(nullptr, 0, nullptr) {}
31
onFilterImage(SkSpecialImage * source,const Context &,SkIPoint * offset) const32 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
33 SkIPoint* offset) const override {
34 return nullptr;
35 }
onMakeColorSpace(SkColorSpaceXformer *) const36 sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override {
37 return sk_ref_sp(this);
38 }
39
40 private:
41
42 typedef SkImageFilter INHERITED;
43 };
44
CreateProc(SkReadBuffer & buffer)45 sk_sp<SkFlattenable> FailImageFilter::CreateProc(SkReadBuffer& buffer) {
46 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
47 return FailImageFilter::Make();
48 }
49
50 class IdentityImageFilter : public SkImageFilter {
51 public:
Make(sk_sp<SkImageFilter> input)52 static sk_sp<SkImageFilter> Make(sk_sp<SkImageFilter> input) {
53 return sk_sp<SkImageFilter>(new IdentityImageFilter(std::move(input)));
54 }
55
56
57 SK_FLATTENABLE_HOOKS(IdentityImageFilter)
58 protected:
onFilterImage(SkSpecialImage * source,const Context &,SkIPoint * offset) const59 sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
60 SkIPoint* offset) const override {
61 offset->set(0, 0);
62 return sk_ref_sp<SkSpecialImage>(source);
63 }
onMakeColorSpace(SkColorSpaceXformer *) const64 sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override {
65 return sk_ref_sp(const_cast<IdentityImageFilter*>(this));
66 }
67
68 private:
IdentityImageFilter(sk_sp<SkImageFilter> input)69 IdentityImageFilter(sk_sp<SkImageFilter> input) : INHERITED(&input, 1, nullptr) {}
70
71 typedef SkImageFilter INHERITED;
72 };
73
74 // Register these image filters as deserializable before main().
75 namespace {
76 static struct Initializer {
Initializer__anonfe9da76a0111::Initializer77 Initializer() {
78 SK_REGISTER_FLATTENABLE(IdentityImageFilter);
79 SK_REGISTER_FLATTENABLE(FailImageFilter);
80 }
81 } initializer;
82 }
83
CreateProc(SkReadBuffer & buffer)84 sk_sp<SkFlattenable> IdentityImageFilter::CreateProc(SkReadBuffer& buffer) {
85 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
86 return IdentityImageFilter::Make(common.getInput(0));
87 }
88
89 ///////////////////////////////////////////////////////////////////////////////
90
draw_paint(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)91 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
92 SkPaint paint;
93 paint.setImageFilter(std::move(imf));
94 paint.setColor(SK_ColorGREEN);
95 canvas->save();
96 canvas->clipRect(r);
97 canvas->drawPaint(paint);
98 canvas->restore();
99 }
100
draw_line(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)101 static void draw_line(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
102 SkPaint paint;
103 paint.setColor(SK_ColorBLUE);
104 paint.setImageFilter(imf);
105 paint.setStrokeWidth(r.width()/10);
106 canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
107 }
108
draw_rect(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)109 static void draw_rect(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
110 SkPaint paint;
111 paint.setColor(SK_ColorYELLOW);
112 paint.setImageFilter(imf);
113 SkRect rr(r);
114 rr.inset(r.width()/10, r.height()/10);
115 canvas->drawRect(rr, paint);
116 }
117
draw_path(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)118 static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
119 SkPaint paint;
120 paint.setColor(SK_ColorMAGENTA);
121 paint.setImageFilter(imf);
122 paint.setAntiAlias(true);
123 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
124 }
125
draw_text(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)126 static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
127 SkPaint paint;
128 paint.setImageFilter(imf);
129 paint.setColor(SK_ColorCYAN);
130 SkFont font(sk_tool_utils::create_portable_typeface(), r.height()/2);
131 SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint,
132 SkTextUtils::kCenter_Align);
133 }
134
draw_bitmap(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)135 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
136 SkPaint paint;
137 paint.setImageFilter(std::move(imf));
138
139 SkIRect bounds;
140 r.roundOut(&bounds);
141
142 SkBitmap bm;
143 bm.allocN32Pixels(bounds.width(), bounds.height());
144 bm.eraseColor(SK_ColorTRANSPARENT);
145 SkCanvas c(bm);
146 draw_path(&c, r, nullptr);
147
148 canvas->drawBitmap(bm, 0, 0, &paint);
149 }
150
151 ///////////////////////////////////////////////////////////////////////////////
152
153 class ImageFiltersBaseGM : public skiagm::GM {
154 public:
ImageFiltersBaseGM()155 ImageFiltersBaseGM () {}
156
157 protected:
onShortName()158 SkString onShortName() override {
159 return SkString("imagefiltersbase");
160 }
161
onISize()162 SkISize onISize() override { return SkISize::Make(700, 500); }
163
draw_frame(SkCanvas * canvas,const SkRect & r)164 void draw_frame(SkCanvas* canvas, const SkRect& r) {
165 SkPaint paint;
166 paint.setStyle(SkPaint::kStroke_Style);
167 paint.setColor(SK_ColorRED);
168 canvas->drawRect(r, paint);
169 }
170
onDraw(SkCanvas * canvas)171 void onDraw(SkCanvas* canvas) override {
172 void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
173 draw_paint,
174 draw_line, draw_rect, draw_path, draw_text,
175 draw_bitmap,
176 };
177
178 auto cf = SkColorFilter::MakeModeFilter(SK_ColorRED, SkBlendMode::kSrcIn);
179 sk_sp<SkImageFilter> filters[] = {
180 nullptr,
181 IdentityImageFilter::Make(nullptr),
182 FailImageFilter::Make(),
183 SkColorFilterImageFilter::Make(std::move(cf), nullptr),
184 // The strage 0.29 value tickles an edge case where crop rect calculates
185 // a small border, but the blur really needs no border. This tickels
186 // an msan uninitialized value bug.
187 SkBlurImageFilter::Make(12.0f, 0.29f, nullptr),
188 SkDropShadowImageFilter::Make(
189 10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE,
190 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
191 nullptr),
192 };
193
194 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
195 SkScalar MARGIN = SkIntToScalar(16);
196 SkScalar DX = r.width() + MARGIN;
197 SkScalar DY = r.height() + MARGIN;
198
199 canvas->translate(MARGIN, MARGIN);
200 for (size_t i = 0; i < SK_ARRAY_COUNT(drawProc); ++i) {
201 canvas->save();
202 for (size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
203 drawProc[i](canvas, r, filters[j]);
204
205 draw_frame(canvas, r);
206 canvas->translate(0, DY);
207 }
208 canvas->restore();
209 canvas->translate(DX, 0);
210 }
211 }
212
213 private:
214 typedef GM INHERITED;
215 };
216 DEF_GM( return new ImageFiltersBaseGM; )
217
218 ///////////////////////////////////////////////////////////////////////////////
219
220 /*
221 * Want to test combos of filter and LCD text, to be sure we disable LCD in the presence of
222 * a filter.
223 */
224 class ImageFiltersTextBaseGM : public skiagm::GM {
225 SkString fSuffix;
226 public:
ImageFiltersTextBaseGM(const char suffix[])227 ImageFiltersTextBaseGM(const char suffix[]) : fSuffix(suffix) {}
228
229 protected:
onShortName()230 SkString onShortName() override {
231 SkString name;
232 name.printf("%s_%s", "textfilter", fSuffix.c_str());
233 return name;
234 }
235
onISize()236 SkISize onISize() override { return SkISize::Make(512, 342); }
237
drawWaterfall(SkCanvas * canvas,const SkPaint & paint)238 void drawWaterfall(SkCanvas* canvas, const SkPaint& paint) {
239 static const SkFont::Edging kEdgings[3] = {
240 SkFont::Edging::kAlias,
241 SkFont::Edging::kAntiAlias,
242 SkFont::Edging::kSubpixelAntiAlias,
243 };
244 SkFont font(sk_tool_utils::create_portable_typeface(), 30);
245
246 SkAutoCanvasRestore acr(canvas, true);
247 for (SkFont::Edging edging : kEdgings) {
248 font.setEdging(edging);
249 canvas->drawString("Hamburgefon", 0, 0, font, paint);
250 canvas->translate(0, 40);
251 }
252 }
253
254 virtual void installFilter(SkPaint* paint) = 0;
255
onDraw(SkCanvas * canvas)256 void onDraw(SkCanvas* canvas) override {
257 SkPaint paint;
258
259 canvas->translate(20, 40);
260
261 for (int doSaveLayer = 0; doSaveLayer <= 1; ++doSaveLayer) {
262 SkAutoCanvasRestore acr(canvas, true);
263 for (int useFilter = 0; useFilter <= 1; ++useFilter) {
264 SkAutoCanvasRestore acr2(canvas, true);
265
266 SkPaint paint;
267 if (useFilter) {
268 this->installFilter(&paint);
269 }
270 if (doSaveLayer) {
271 canvas->saveLayer(nullptr, &paint);
272 paint.setImageFilter(nullptr);
273 }
274 this->drawWaterfall(canvas, paint);
275
276 acr2.restore();
277 canvas->translate(250, 0);
278 }
279 acr.restore();
280 canvas->translate(0, 200);
281 }
282 }
283
284 private:
285 typedef GM INHERITED;
286 };
287
288 class ImageFiltersText_IF : public ImageFiltersTextBaseGM {
289 public:
ImageFiltersText_IF()290 ImageFiltersText_IF() : ImageFiltersTextBaseGM("image") {}
291
installFilter(SkPaint * paint)292 void installFilter(SkPaint* paint) override {
293 paint->setImageFilter(SkBlurImageFilter::Make(1.5f, 1.5f, nullptr));
294 }
295 };
296 DEF_GM( return new ImageFiltersText_IF; )
297
298 class ImageFiltersText_CF : public ImageFiltersTextBaseGM {
299 public:
ImageFiltersText_CF()300 ImageFiltersText_CF() : ImageFiltersTextBaseGM("color") {}
301
installFilter(SkPaint * paint)302 void installFilter(SkPaint* paint) override {
303 paint->setColorFilter(SkColorFilter::MakeModeFilter(SK_ColorBLUE, SkBlendMode::kSrcIn));
304 }
305 };
306 DEF_GM( return new ImageFiltersText_CF; )
307