Weston Tracey | 6d4577b | 2020-12-30 13:29:00 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2020 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 "fuzz/Fuzz.h" |
| 9 | #include "fuzz/FuzzCommon.h" |
| 10 | #include "include/core/SkBitmap.h" |
| 11 | #include "include/core/SkCanvas.h" |
| 12 | #include "include/core/SkColor.h" |
| 13 | #include "include/core/SkEncodedImageFormat.h" |
| 14 | #include "include/core/SkFontMgr.h" |
| 15 | #include "include/core/SkFontStyle.h" |
| 16 | #include "include/core/SkImageEncoder.h" |
| 17 | #include "include/core/SkPaint.h" |
| 18 | #include "include/core/SkPoint.h" |
| 19 | #include "include/core/SkRect.h" |
| 20 | #include "include/core/SkRefCnt.h" |
| 21 | #include "include/core/SkScalar.h" |
| 22 | #include "include/core/SkStream.h" |
| 23 | #include "include/core/SkString.h" |
| 24 | #include "include/core/SkTypeface.h" |
| 25 | #include "include/core/SkTypes.h" |
| 26 | #include "modules/skparagraph/include/DartTypes.h" |
| 27 | #include "modules/skparagraph/include/FontCollection.h" |
| 28 | #include "modules/skparagraph/include/Paragraph.h" |
| 29 | #include "modules/skparagraph/include/ParagraphCache.h" |
| 30 | #include "modules/skparagraph/include/ParagraphStyle.h" |
| 31 | #include "modules/skparagraph/include/TextShadow.h" |
| 32 | #include "modules/skparagraph/include/TextStyle.h" |
| 33 | #include "modules/skparagraph/include/TypefaceFontProvider.h" |
| 34 | #include "modules/skparagraph/src/ParagraphBuilderImpl.h" |
| 35 | #include "modules/skparagraph/src/ParagraphImpl.h" |
| 36 | #include "modules/skparagraph/src/Run.h" |
| 37 | #include "modules/skparagraph/src/TextLine.h" |
| 38 | #include "modules/skparagraph/utils/TestFontCollection.h" |
| 39 | #include "src/core/SkOSFile.h" |
| 40 | #include "src/core/SkSpan.h" |
| 41 | #include "src/utils/SkOSPath.h" |
| 42 | #include "src/utils/SkShaperJSONWriter.h" |
| 43 | #include "tests/Test.h" |
| 44 | #include "tools/Resources.h" |
| 45 | |
| 46 | |
| 47 | #include <string.h> |
| 48 | #include <algorithm> |
| 49 | #include <limits> |
| 50 | #include <memory> |
| 51 | #include <string> |
| 52 | #include <utility> |
| 53 | #include <vector> |
| 54 | |
| 55 | using namespace skia::textlayout; |
| 56 | namespace { |
| 57 | const uint8_t MAX_TEXT_LENGTH = 255; |
| 58 | const uint8_t MAX_TEXT_ADDITIONS = 4; |
Weston Tracey | 3dd203d | 2021-02-08 14:02:53 -0500 | [diff] [blame] | 59 | // Use 250 so uint8 can create text and layout width larger than the canvas. |
| 60 | const uint16_t TEST_CANVAS_DIM = 250; |
Weston Tracey | 6d4577b | 2020-12-30 13:29:00 -0500 | [diff] [blame] | 61 | |
| 62 | class ResourceFontCollection : public FontCollection { |
| 63 | public: |
| 64 | ResourceFontCollection(bool testOnly = false) |
| 65 | : fFontsFound(false) |
| 66 | , fResolvedFonts(0) |
| 67 | , fResourceDir(GetResourcePath("fonts").c_str()) |
| 68 | , fFontProvider(sk_make_sp<TypefaceFontProvider>()) { |
| 69 | std::vector<SkString> fonts; |
| 70 | SkOSFile::Iter iter(fResourceDir.c_str()); |
| 71 | |
| 72 | SkString path; |
| 73 | while (iter.next(&path)) { |
| 74 | if (path.endsWith("Roboto-Italic.ttf")) { |
| 75 | fFontsFound = true; |
| 76 | } |
| 77 | fonts.emplace_back(path); |
| 78 | } |
| 79 | |
| 80 | if (!fFontsFound) { |
| 81 | // SkDebugf("Fonts not found, skipping all the tests\n"); |
| 82 | return; |
| 83 | } |
| 84 | // Only register fonts if we have to |
| 85 | for (auto& font : fonts) { |
| 86 | SkString file_path; |
| 87 | file_path.printf("%s/%s", fResourceDir.c_str(), font.c_str()); |
| 88 | fFontProvider->registerTypeface(SkTypeface::MakeFromFile(file_path.c_str())); |
| 89 | } |
| 90 | |
| 91 | if (testOnly) { |
| 92 | this->setTestFontManager(std::move(fFontProvider)); |
| 93 | } else { |
| 94 | this->setAssetFontManager(std::move(fFontProvider)); |
| 95 | } |
| 96 | this->disableFontFallback(); |
| 97 | } |
| 98 | |
| 99 | size_t resolvedFonts() const { return fResolvedFonts; } |
| 100 | |
| 101 | // TODO: temp solution until we check in fonts |
| 102 | bool fontsFound() const { return fFontsFound; } |
| 103 | |
| 104 | private: |
| 105 | bool fFontsFound; |
| 106 | size_t fResolvedFonts; |
| 107 | std::string fResourceDir; |
| 108 | sk_sp<TypefaceFontProvider> fFontProvider; |
| 109 | }; |
| 110 | |
| 111 | // buffer must be at least MAX_TEXT_LENGTH in length. |
| 112 | // Returns size of text placed in buffer. |
| 113 | template <typename T> |
| 114 | uint8_t RandomText(T* buffer, Fuzz* fuzz) { |
| 115 | uint8_t text_length; |
| 116 | fuzz->nextRange(&text_length, 0, MAX_TEXT_LENGTH); |
| 117 | fuzz->nextN(buffer, text_length); |
| 118 | return text_length; |
| 119 | } |
| 120 | |
| 121 | // Add random bytes to the paragraph. |
| 122 | void AddASCIIText(ParagraphBuilder* builder,Fuzz* fuzz) { |
| 123 | char text[MAX_TEXT_LENGTH]; |
| 124 | const auto text_length = RandomText(text, fuzz); |
| 125 | builder->addText(text, text_length); |
| 126 | } |
| 127 | // Add random bytes to the paragraph. |
| 128 | void AddUnicodeText(ParagraphBuilder* builder,Fuzz* fuzz) { |
| 129 | char16_t text[MAX_TEXT_LENGTH]; |
| 130 | const auto text_length = RandomText(text, fuzz); |
| 131 | builder->addText(std::u16string(text, text_length)); |
| 132 | } |
| 133 | |
| 134 | // Combining characters to produce 'Zalgo' text. |
| 135 | const std::u16string COMBINING_DOWN = u"\u0316\u0317\u0318\u0319\u031c\u031d\u031e\u031f\u0320\u0324\u0325\u0326\u0329\u032a\u032b\u032c\u032d\u032e\u032f\u0330\u0331\u0332\u0333\u0339\u033a\u033b\u033c\u0345\u0347\u0348\u0349\u034d\u034e\u0353\u0354\u0355\u0356\u0359\u035a\u0323"; |
| 136 | const std::u16string COMBINING_UP = u"\u030d\u030e\u0304\u0305\u033f\u0311\u0306\u0310\u0352\u0357\u0351\u0307\u0308\u030a\u0342\u0343\u0344\u034a\u034b\u034c\u0303\u0302\u030c\u0350\u0300\u0301\u030b\u030f\u0312\u0313\u0314\u033d\u0309\u0363\u0364\u0365\u0366\u0367\u0368\u0369\u036a\u036b\u036c\u036d\u036e\u035b\u0346\u031a"; |
| 137 | const std::u16string COMBINING_MIDDLE = u"\u0315\u031b\u0340\u0341\u0358\u0321\u0322\u0327\u0328\u0334\u0335\u0336\u034f\u035c\u035d\u035e\u035f\u0360\u0362\u0338\u0337\u0361\u0489"; |
| 138 | // Add random Zalgo text to the paragraph. |
| 139 | void AddZalgoText(ParagraphBuilder* builder, Fuzz* fuzz) { |
| 140 | char text[MAX_TEXT_LENGTH]; |
| 141 | const auto text_length = RandomText(text, fuzz); |
| 142 | std::u16string result; |
| 143 | |
| 144 | for (auto& c : std::string(text, text_length)) { |
| 145 | result += c; |
| 146 | uint8_t mark_count; |
| 147 | fuzz->next(&mark_count); |
| 148 | for (int i = 0; i < mark_count; i++) { |
| 149 | uint8_t mark_type, mark_index; |
| 150 | fuzz->next(&mark_type, &mark_index); |
| 151 | switch (mark_type % 3) { |
| 152 | case 0: |
| 153 | result += COMBINING_UP[mark_index % COMBINING_UP.size()]; |
| 154 | break; |
| 155 | case 1: |
| 156 | result += COMBINING_MIDDLE[mark_index % COMBINING_MIDDLE.size()]; |
| 157 | break; |
| 158 | case 2: |
| 159 | default: |
| 160 | result += COMBINING_DOWN[mark_index % COMBINING_DOWN.size()]; |
| 161 | break; |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | builder->addText(result); |
| 166 | } |
| 167 | |
| 168 | void AddStyle(ParagraphBuilder* builder, Fuzz* fuzz) { |
| 169 | // TODO(westont): Make this probabilistic, and fill in the remaining TextStyle fields. |
| 170 | TextStyle ts; |
| 171 | ts.setFontFamilies({SkString("Roboto")}); |
| 172 | //ts.setColor(SK_ColorBLACK); |
| 173 | //ts.setForegroundColor |
| 174 | //ts.setBackgroundColor |
| 175 | //ts.setDecoration(TextDecoration decoration); |
| 176 | //ts.setDecorationMode(TextDecorationMode mode); |
| 177 | //ts.setDecorationStyle(TextDecorationStyle style); |
| 178 | //ts.setDecorationColor(SkColor color); |
| 179 | //ts.setDecorationThicknessMultiplier(SkScalar m); |
| 180 | //ts.setFontStyle |
| 181 | //ts.addShadow |
| 182 | //ts.addFontFeature |
| 183 | //ts.setFontSize |
| 184 | //ts.setHeight |
| 185 | //ts.setHeightOverride |
| 186 | //ts.setletterSpacing |
| 187 | //ts.setWordSpacing |
| 188 | //ts.setTypeface |
| 189 | //ts.setLocale |
| 190 | //ts.setTextBaseline |
| 191 | //ts.setPlaceholder |
| 192 | |
| 193 | builder->pushStyle(ts); |
| 194 | } |
| 195 | void RemoveStyle(ParagraphBuilder* builder, Fuzz* fuzz) { |
| 196 | bool pop; |
| 197 | fuzz->next(&pop); |
| 198 | if (pop) { |
| 199 | builder->pop(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | void AddStyleAndText(ParagraphBuilder* builder, Fuzz* fuzz) { |
| 204 | AddStyle(builder, fuzz); |
| 205 | uint8_t text_type; |
| 206 | fuzz->next(&text_type); |
| 207 | switch (text_type % 3) { |
| 208 | case 0: |
| 209 | AddASCIIText(builder, fuzz); |
| 210 | break; |
| 211 | case 1: |
| 212 | AddUnicodeText(builder, fuzz); |
| 213 | break; |
| 214 | case 2: |
| 215 | AddZalgoText(builder, fuzz); |
| 216 | break; |
| 217 | } |
| 218 | RemoveStyle(builder, fuzz); |
| 219 | |
| 220 | } |
| 221 | |
| 222 | ParagraphStyle BuildParagraphStyle(Fuzz* fuzz) { |
| 223 | ParagraphStyle ps; |
| 224 | bool hinting; |
| 225 | fuzz->next(&hinting); |
| 226 | if (hinting) { |
| 227 | ps.turnHintingOff(); |
| 228 | } |
| 229 | StrutStyle ss; |
| 230 | // TODO(westont): Fuzz this object. |
| 231 | ps.setStrutStyle(ss); |
| 232 | TextDirection td; |
| 233 | fuzz->nextEnum(&td, TextDirection::kRtl); |
| 234 | ps.setTextDirection(td); |
| 235 | TextAlign ta; |
| 236 | fuzz->nextEnum(&ta, TextAlign::kEnd); |
| 237 | ps.setTextAlign(ta); |
| 238 | size_t ml; |
| 239 | fuzz->next(&ml); |
| 240 | ps.setMaxLines(ml); |
| 241 | // TODO(westont): Randomize with other values and no value. |
| 242 | ps.setEllipsis(u"\u2026"); |
| 243 | SkScalar h; |
| 244 | fuzz->next(&h); |
| 245 | ps.setHeight(h); |
| 246 | TextHeightBehavior thb = TextHeightBehavior::kAll; |
| 247 | // TODO(westont): This crashes our seed test case, why? |
| 248 | //fuzz->nextEnum(&thb, TextHeightBehavior::kDisableAll); |
| 249 | ps.setTextHeightBehavior(thb); |
| 250 | |
| 251 | return ps; |
| 252 | } |
| 253 | |
| 254 | } // namespace |
| 255 | |
Weston Tracey | 1a771fe | 2021-02-04 11:09:59 -0500 | [diff] [blame] | 256 | DEF_FUZZ(SkParagraph, fuzz) { |
Weston Tracey | 6d4577b | 2020-12-30 13:29:00 -0500 | [diff] [blame] | 257 | static sk_sp<ResourceFontCollection> fontCollection = sk_make_sp<ResourceFontCollection>(); |
| 258 | ParagraphStyle paragraph_style = BuildParagraphStyle(fuzz); |
| 259 | ParagraphBuilderImpl builder(paragraph_style, fontCollection); |
| 260 | |
| 261 | uint8_t iterations; |
| 262 | fuzz->nextRange(&iterations, 1, MAX_TEXT_ADDITIONS); |
| 263 | for (int i = 0; i < iterations; i++) { |
| 264 | AddStyleAndText(&builder, fuzz); |
| 265 | } |
| 266 | // TODO(westont): Figure out if we can get more converage by having fontsFound, current |
| 267 | // they're not. |
| 268 | // if (!fontCollection->fontsFound()) return; |
| 269 | |
| 270 | builder.pop(); |
| 271 | auto paragraph = builder.Build(); |
| 272 | |
Weston Tracey | 3dd203d | 2021-02-08 14:02:53 -0500 | [diff] [blame] | 273 | SkBitmap bm; |
| 274 | if (!bm.tryAllocN32Pixels(TEST_CANVAS_DIM, TEST_CANVAS_DIM)) { |
| 275 | return; |
| 276 | } |
| 277 | SkCanvas canvas(bm); |
| 278 | uint8_t layout_width; |
| 279 | fuzz->next(&layout_width); |
| 280 | paragraph->layout(layout_width); |
| 281 | paragraph->paint(&canvas, 0, 0); |
Weston Tracey | 6d4577b | 2020-12-30 13:29:00 -0500 | [diff] [blame] | 282 | } |