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1 /*
2  * Copyright 2014 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 "Test.h"
9 
10 #include "Resources.h"
11 #include "SkCanvas.h"
12 #include "SkCommandLineFlags.h"
13 #include "SkFixed.h"
14 #include "SkFont.h"
15 #include "SkFontMgr_android.h"
16 #include "SkFontMgr_android_parser.h"
17 #include "SkOSFile.h"
18 #include "SkTypeface.h"
19 
20 #include <cmath>
21 #include <cstdio>
22 
23 DECLARE_bool(verboseFontMgr);
24 
CountFallbacks(SkTDArray<FontFamily * > fontFamilies)25 int CountFallbacks(SkTDArray<FontFamily*> fontFamilies) {
26     int countOfFallbackFonts = 0;
27     for (int i = 0; i < fontFamilies.count(); i++) {
28         if (fontFamilies[i]->fIsFallbackFont) {
29             countOfFallbackFonts++;
30         }
31     }
32     return countOfFallbackFonts;
33 }
34 
35 //https://tools.ietf.org/html/rfc5234#appendix-B.1
isALPHA(int c)36 static bool isALPHA(int c) {
37     return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
38 }
39 
40 //https://tools.ietf.org/html/rfc5234#appendix-B.1
isDIGIT(int c)41 static bool isDIGIT(int c) {
42     return ('0' <= c && c <= '9');
43 }
44 
ValidateLoadedFonts(SkTDArray<FontFamily * > fontFamilies,const char * firstExpectedFile,skiatest::Reporter * reporter)45 static void ValidateLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* firstExpectedFile,
46                                 skiatest::Reporter* reporter) {
47     REPORTER_ASSERT(reporter, fontFamilies[0]->fNames.count() == 5);
48     REPORTER_ASSERT(reporter, !strcmp(fontFamilies[0]->fNames[0].c_str(), "sans-serif"));
49     REPORTER_ASSERT(reporter,
50                     !strcmp(fontFamilies[0]->fFonts[0].fFileName.c_str(), firstExpectedFile));
51     REPORTER_ASSERT(reporter, !fontFamilies[0]->fIsFallbackFont);
52 
53     // Check that the languages are all sane.
54     for (const auto& fontFamily : fontFamilies) {
55         for (const auto& lang : fontFamily->fLanguages) {
56             const SkString& langString = lang.getTag();
57             for (size_t i = 0; i < langString.size(); ++i) {
58                 int c = langString[i];
59                 REPORTER_ASSERT(reporter, isALPHA(c) || isDIGIT(c) || '-' == c);
60             }
61         }
62     }
63 
64     // All file names in the test configuration files start with a capital letter.
65     // This is not a general requirement, but it is true of all the test configuration data.
66     // Verifying ensures the filenames have been read sanely and have not been 'sliced'.
67     for (int i = 0; i < fontFamilies.count(); ++i) {
68         FontFamily& family = *fontFamilies[i];
69         for (int j = 0; j < family.fFonts.count(); ++j) {
70             FontFileInfo& file = family.fFonts[j];
71             REPORTER_ASSERT(reporter, !file.fFileName.isEmpty() &&
72                                       file.fFileName[0] >= 'A' &&
73                                       file.fFileName[0] <= 'Z');
74         }
75     }
76 }
77 
DumpFiles(const FontFamily & fontFamily)78 static void DumpFiles(const FontFamily& fontFamily) {
79     for (int j = 0; j < fontFamily.fFonts.count(); ++j) {
80         const FontFileInfo& ffi = fontFamily.fFonts[j];
81         SkDebugf("  file (%d) %s#%d", ffi.fWeight, ffi.fFileName.c_str(), ffi.fIndex);
82         for (const auto& coordinate : ffi.fVariationDesignPosition) {
83             SkDebugf(" @'%c%c%c%c'=%f",
84                         (coordinate.axis >> 24) & 0xFF,
85                         (coordinate.axis >> 16) & 0xFF,
86                         (coordinate.axis >>  8) & 0xFF,
87                         (coordinate.axis      ) & 0xFF,
88                         coordinate.value);
89         }
90         SkDebugf("\n");
91     }
92 }
93 
DumpLoadedFonts(SkTDArray<FontFamily * > fontFamilies,const char * label)94 static void DumpLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* label) {
95     if (!FLAGS_verboseFontMgr) {
96         return;
97     }
98 
99     SkDebugf("\n--- Dumping %s\n", label);
100     for (int i = 0; i < fontFamilies.count(); ++i) {
101         SkDebugf("Family %d:\n", i);
102         switch(fontFamilies[i]->fVariant) {
103             case kElegant_FontVariant: SkDebugf("  elegant\n"); break;
104             case kCompact_FontVariant: SkDebugf("  compact\n"); break;
105             default: break;
106         }
107         SkDebugf("  basePath %s\n", fontFamilies[i]->fBasePath.c_str());
108         if (!fontFamilies[i]->fLanguages.empty()) {
109             SkDebugf("  language");
110             for (const auto& lang : fontFamilies[i]->fLanguages) {
111                 SkDebugf(" %s", lang.getTag().c_str());
112             }
113             SkDebugf("\n");
114         }
115         for (int j = 0; j < fontFamilies[i]->fNames.count(); ++j) {
116             SkDebugf("  name %s\n", fontFamilies[i]->fNames[j].c_str());
117         }
118         DumpFiles(*fontFamilies[i]);
119         fontFamilies[i]->fallbackFamilies.foreach(
120             [](SkString, std::unique_ptr<FontFamily>* fallbackFamily) {
121                 SkDebugf("  Fallback for: %s\n", (*fallbackFamily)->fFallbackFor.c_str());
122                 DumpFiles(*(*fallbackFamily).get());
123             }
124         );
125     }
126     SkDebugf("\n\n");
127 }
128 
test_parse_fixed_r(skiatest::Reporter * reporter,double low,double high,double inc)129 template <int N, typename T> static double test_parse_fixed_r(skiatest::Reporter* reporter,
130                                                               double low, double high, double inc)
131 {
132     double SK_FixedMax_double = nextafter(1 << (sizeof(T) * CHAR_BIT - N - 1), 0.0);
133     double SK_FixedEpsilon_double = (1.0 / (1 << N));
134     double maxError = 0;
135     char buffer[64];
136     for (double f = low; f < high; f += inc) {
137         SkString s;
138         // 'sprintf' formatting as expected depends on the current locale being "C".
139         // We currently expect tests and tools to run in the "C" locale.
140         sprintf(buffer, "%.20f", f);
141         T fix;
142         bool b = parse_fixed<N>(buffer, &fix);
143         if (b) {
144             double f2 = fix * SK_FixedEpsilon_double;
145             double error = fabs(f - f2);
146             REPORTER_ASSERT(reporter,  error <= SK_FixedEpsilon_double);
147             maxError = SkTMax(maxError, error);
148         } else {
149             REPORTER_ASSERT(reporter, f < -SK_FixedMax_double || SK_FixedMax_double < f);
150         }
151     }
152 
153     //SkDebugf("maxError: %.20f\n", maxError);
154     return maxError;
155 }
156 
test_parse_fixed(skiatest::Reporter * reporter)157 static void test_parse_fixed(skiatest::Reporter* reporter) {
158     test_parse_fixed_r<27, int32_t>(reporter, -8.1, -7.9, 0.000001);
159     test_parse_fixed_r<27, int32_t>(reporter, -0.1, 0.1, 0.000001);
160     test_parse_fixed_r<27, int32_t>(reporter, 7.9, 8.1, 0.000001);
161     test_parse_fixed_r<16, int32_t>(reporter, -0.125, 0.125, 1.0 / (1 << 19));
162     test_parse_fixed_r<16, int32_t>(reporter, -32768.125, -32766.875, 1.0 / (1 << 17));
163     test_parse_fixed_r<16, int32_t>(reporter, 32766.875, 32768.125, 1.0 / (1 << 17));
164     test_parse_fixed_r<16, int32_t>(reporter, -1.1, 1.1, 0.0001);
165 
166     SkFixed fix;
167     REPORTER_ASSERT(reporter, !parse_fixed<27>("-17.1", &fix));
168     REPORTER_ASSERT(reporter, !parse_fixed<16>("32768", &fix));
169     REPORTER_ASSERT(reporter, !parse_fixed<16>("", &fix));
170     REPORTER_ASSERT(reporter, !parse_fixed<16>(".", &fix));
171     REPORTER_ASSERT(reporter, !parse_fixed<16>("123.", &fix));
172     REPORTER_ASSERT(reporter, !parse_fixed<16>("a", &fix));
173     REPORTER_ASSERT(reporter, !parse_fixed<16>(".123a", &fix));
174 }
175 
DEF_TEST(FontMgrAndroidParser,reporter)176 DEF_TEST(FontMgrAndroidParser, reporter) {
177     test_parse_fixed(reporter);
178 
179     bool resourcesMissing = false;
180 
181     SkTDArray<FontFamily*> preV17FontFamilies;
182     SkFontMgr_Android_Parser::GetCustomFontFamilies(preV17FontFamilies,
183         SkString("/custom/font/path/"),
184         GetResourcePath("android_fonts/pre_v17/system_fonts.xml").c_str(),
185         GetResourcePath("android_fonts/pre_v17/fallback_fonts.xml").c_str());
186 
187     if (preV17FontFamilies.count() > 0) {
188         REPORTER_ASSERT(reporter, preV17FontFamilies.count() == 14);
189         REPORTER_ASSERT(reporter, CountFallbacks(preV17FontFamilies) == 10);
190 
191         DumpLoadedFonts(preV17FontFamilies, "pre version 17");
192         ValidateLoadedFonts(preV17FontFamilies, "Roboto-Regular.ttf", reporter);
193     } else {
194         resourcesMissing = true;
195     }
196     preV17FontFamilies.deleteAll();
197 
198 
199     SkTDArray<FontFamily*> v17FontFamilies;
200     SkFontMgr_Android_Parser::GetCustomFontFamilies(v17FontFamilies,
201         SkString("/custom/font/path/"),
202         GetResourcePath("android_fonts/v17/system_fonts.xml").c_str(),
203         GetResourcePath("android_fonts/v17/fallback_fonts.xml").c_str(),
204         GetResourcePath("android_fonts/v17").c_str());
205 
206     if (v17FontFamilies.count() > 0) {
207         REPORTER_ASSERT(reporter, v17FontFamilies.count() == 56);
208         REPORTER_ASSERT(reporter, CountFallbacks(v17FontFamilies) == 46);
209 
210         DumpLoadedFonts(v17FontFamilies, "version 17");
211         ValidateLoadedFonts(v17FontFamilies, "Roboto-Regular.ttf", reporter);
212     } else {
213         resourcesMissing = true;
214     }
215     v17FontFamilies.deleteAll();
216 
217 
218     SkTDArray<FontFamily*> v22FontFamilies;
219     SkFontMgr_Android_Parser::GetCustomFontFamilies(v22FontFamilies,
220         SkString("/custom/font/path/"),
221         GetResourcePath("android_fonts/v22/fonts.xml").c_str(),
222         nullptr);
223 
224     if (v22FontFamilies.count() > 0) {
225         REPORTER_ASSERT(reporter, v22FontFamilies.count() == 54);
226         REPORTER_ASSERT(reporter, CountFallbacks(v22FontFamilies) == 42);
227 
228         DumpLoadedFonts(v22FontFamilies, "version 22");
229         ValidateLoadedFonts(v22FontFamilies, "Roboto-Thin.ttf", reporter);
230     } else {
231         resourcesMissing = true;
232     }
233     v22FontFamilies.deleteAll();
234 
235     if (resourcesMissing) {
236         SkDebugf("---- Resource files missing for FontConfigParser test\n");
237     }
238 }
239 
DEF_TEST(FontMgrAndroidLegacyMakeTypeface,reporter)240 DEF_TEST(FontMgrAndroidLegacyMakeTypeface, reporter) {
241     constexpr char fontsXmlFilename[] = "fonts/fonts.xml";
242     SkString basePath = GetResourcePath("fonts/");
243     SkString fontsXml = GetResourcePath(fontsXmlFilename);
244 
245     if (!sk_exists(fontsXml.c_str())) {
246         ERRORF(reporter, "file missing: %s\n", fontsXmlFilename);
247         return;
248     }
249 
250     SkFontMgr_Android_CustomFonts custom;
251     custom.fSystemFontUse = SkFontMgr_Android_CustomFonts::kOnlyCustom;
252     custom.fBasePath = basePath.c_str();
253     custom.fFontsXml = fontsXml.c_str();
254     custom.fFallbackFontsXml = nullptr;
255     custom.fIsolated = false;
256 
257     sk_sp<SkFontMgr> fm(SkFontMgr_New_Android(&custom));
258     sk_sp<SkTypeface> t(fm->legacyMakeTypeface("non-existent-font", SkFontStyle()));
259     REPORTER_ASSERT(reporter, nullptr == t);
260 }
261 
bitmap_compare(const SkBitmap & ref,const SkBitmap & test)262 static bool bitmap_compare(const SkBitmap& ref, const SkBitmap& test) {
263     for (int y = 0; y < test.height(); ++y) {
264         for (int x = 0; x < test.width(); ++x) {
265             SkColor testColor = test.getColor(x, y);
266             SkColor refColor = ref.getColor(x, y);
267             if (refColor != testColor) {
268                 return false;
269             }
270         }
271     }
272     return true;
273 }
274 
DEF_TEST(FontMgrAndroidSystemVariableTypeface,reporter)275 DEF_TEST(FontMgrAndroidSystemVariableTypeface, reporter) {
276     constexpr char fontsXmlFilename[] = "fonts/fonts.xml";
277     SkString basePath = GetResourcePath("fonts/");
278     SkString fontsXml = GetResourcePath(fontsXmlFilename);
279 
280     if (!sk_exists(fontsXml.c_str())) {
281         ERRORF(reporter, "file missing: %s\n", fontsXmlFilename);
282         return;
283     }
284 
285     SkFontMgr_Android_CustomFonts custom;
286     custom.fSystemFontUse = SkFontMgr_Android_CustomFonts::kOnlyCustom;
287     custom.fBasePath = basePath.c_str();
288     custom.fFontsXml = fontsXml.c_str();
289     custom.fFallbackFontsXml = nullptr;
290     custom.fIsolated = false;
291 
292     sk_sp<SkFontMgr> fontMgr(SkFontMgr_New_Android(&custom));
293     // "sans-serif" in "fonts/fonts.xml" is "fonts/Distortable.ttf"
294     sk_sp<SkTypeface> typeface(fontMgr->legacyMakeTypeface("sans-serif", SkFontStyle()));
295 
296     SkBitmap bitmapStream;
297     bitmapStream.allocN32Pixels(64, 64);
298     SkCanvas canvasStream(bitmapStream);
299     canvasStream.drawColor(SK_ColorWHITE);
300 
301     SkBitmap bitmapClone;
302     bitmapClone.allocN32Pixels(64, 64);
303     SkCanvas canvasClone(bitmapClone);
304     canvasStream.drawColor(SK_ColorWHITE);
305 
306     SkPaint paint;
307     paint.setColor(SK_ColorGRAY);
308     paint.setAntiAlias(true);
309     constexpr float kTextSize = 20;
310 
311     std::unique_ptr<SkStreamAsset> distortableStream(
312         GetResourceAsStream("fonts/Distortable.ttf"));
313     if (!distortableStream) {
314         return;
315     }
316 
317     SkPoint point = SkPoint::Make(20.0f, 20.0f);
318     SkFourByteTag tag = SkSetFourByteTag('w', 'g', 'h', 't');
319 
320     for (int i = 0; i < 10; ++i) {
321         SkScalar styleValue =
322             SkDoubleToScalar(0.5 + i * ((2.0 - 0.5) / 10));
323         SkFontArguments::VariationPosition::Coordinate
324             coordinates[] = {{tag, styleValue}};
325         SkFontArguments::VariationPosition
326             position = {coordinates, SK_ARRAY_COUNT(coordinates)};
327 
328         SkFont fontStream(
329             fontMgr->makeFromStream(distortableStream->duplicate(),
330                                     SkFontArguments().setVariationDesignPosition(position)),
331             kTextSize);
332         fontStream.setEdging(SkFont::Edging::kSubpixelAntiAlias);
333 
334 
335         SkFont fontClone(
336             typeface->makeClone(SkFontArguments().setVariationDesignPosition(position)), kTextSize);
337         fontClone.setEdging(SkFont::Edging::kSubpixelAntiAlias);
338 
339         constexpr char text[] = "abc";
340 
341         canvasStream.drawColor(SK_ColorWHITE);
342         canvasStream.drawString(text, point.fX, point.fY, fontStream, paint);
343 
344         canvasClone.drawColor(SK_ColorWHITE);
345         canvasClone.drawString(text, point.fX, point.fY, fontClone, paint);
346 
347         bool success = bitmap_compare(bitmapStream, bitmapClone);
348         REPORTER_ASSERT(reporter, success);
349     }
350 }
351 
DEF_TEST(FontMgrAndroidSystemFallbackFor,reporter)352 DEF_TEST(FontMgrAndroidSystemFallbackFor, reporter) {
353     constexpr char fontsXmlFilename[] = "fonts/fonts.xml";
354     SkString basePath = GetResourcePath("fonts/");
355     SkString fontsXml = GetResourcePath(fontsXmlFilename);
356 
357     if (!sk_exists(fontsXml.c_str())) {
358         ERRORF(reporter, "file missing: %s\n", fontsXmlFilename);
359         return;
360     }
361 
362     SkFontMgr_Android_CustomFonts custom;
363     custom.fSystemFontUse = SkFontMgr_Android_CustomFonts::kOnlyCustom;
364     custom.fBasePath = basePath.c_str();
365     custom.fFontsXml = fontsXml.c_str();
366     custom.fFallbackFontsXml = nullptr;
367     custom.fIsolated = false;
368 
369     sk_sp<SkFontMgr> fontMgr(SkFontMgr_New_Android(&custom));
370     // "sans-serif" in "fonts/fonts.xml" is "fonts/Distortable.ttf", which doesn't have a '!'
371     // but "TestTTC" has a bold font which does have '!' and is marked as fallback for "sans-serif"
372     // and should take precedence over the same font marked as normal weight next to it.
373     sk_sp<SkTypeface> typeface(fontMgr->matchFamilyStyleCharacter(
374         "sans-serif", SkFontStyle(), nullptr, 0, '!'));
375 
376     REPORTER_ASSERT(reporter, typeface->fontStyle() == SkFontStyle::Bold());
377 }
378