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 "Resources.h"
9#include "SkCommandLineFlags.h"
10#include "SkFixed.h"
11#include "SkFontMgr_android_parser.h"
12#include "Test.h"
13
14#include <cmath>
15#include <cstdio>
16
17DECLARE_bool(verboseFontMgr);
18
19int CountFallbacks(SkTDArray<FontFamily*> fontFamilies) {
20    int countOfFallbackFonts = 0;
21    for (int i = 0; i < fontFamilies.count(); i++) {
22        if (fontFamilies[i]->fIsFallbackFont) {
23            countOfFallbackFonts++;
24        }
25    }
26    return countOfFallbackFonts;
27}
28
29//https://tools.ietf.org/html/rfc5234#appendix-B.1
30static bool isALPHA(int c) {
31    return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
32}
33
34//https://tools.ietf.org/html/rfc5234#appendix-B.1
35static bool isDIGIT(int c) {
36    return ('0' <= c && c <= '9');
37}
38
39void ValidateLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* firstExpectedFile,
40                         skiatest::Reporter* reporter) {
41    REPORTER_ASSERT(reporter, fontFamilies[0]->fNames.count() == 5);
42    REPORTER_ASSERT(reporter, !strcmp(fontFamilies[0]->fNames[0].c_str(), "sans-serif"));
43    REPORTER_ASSERT(reporter,
44                    !strcmp(fontFamilies[0]->fFonts[0].fFileName.c_str(), firstExpectedFile));
45    REPORTER_ASSERT(reporter, !fontFamilies[0]->fIsFallbackFont);
46
47    // Check that the languages are all sane.
48    for (int i = 0; i < fontFamilies.count(); ++i) {
49        const SkString& lang = fontFamilies[i]->fLanguage.getTag();
50        for (size_t j = 0; j < lang.size(); ++j) {
51            int c = lang[j];
52            REPORTER_ASSERT(reporter, isALPHA(c) || isDIGIT(c) || '-' == c);
53        }
54    }
55
56    // All file names in the test configuration files start with a capital letter.
57    // This is not a general requirement, but it is true of all the test configuration data.
58    // Verifying ensures the filenames have been read sanely and have not been 'sliced'.
59    for (int i = 0; i < fontFamilies.count(); ++i) {
60        FontFamily& family = *fontFamilies[i];
61        for (int j = 0; j < family.fFonts.count(); ++j) {
62            FontFileInfo& file = family.fFonts[j];
63            REPORTER_ASSERT(reporter, !file.fFileName.isEmpty() &&
64                                      file.fFileName[0] >= 'A' &&
65                                      file.fFileName[0] <= 'Z');
66        }
67    }
68}
69
70void DumpLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* label) {
71    if (!FLAGS_verboseFontMgr) {
72        return;
73    }
74
75    SkDebugf("\n--- Dumping %s\n", label);
76    for (int i = 0; i < fontFamilies.count(); ++i) {
77        SkDebugf("Family %d:\n", i);
78        switch(fontFamilies[i]->fVariant) {
79            case kElegant_FontVariant: SkDebugf("  elegant\n"); break;
80            case kCompact_FontVariant: SkDebugf("  compact\n"); break;
81            default: break;
82        }
83        SkDebugf("  basePath %s\n", fontFamilies[i]->fBasePath.c_str());
84        if (!fontFamilies[i]->fLanguage.getTag().isEmpty()) {
85            SkDebugf("  language %s\n", fontFamilies[i]->fLanguage.getTag().c_str());
86        }
87        for (int j = 0; j < fontFamilies[i]->fNames.count(); ++j) {
88            SkDebugf("  name %s\n", fontFamilies[i]->fNames[j].c_str());
89        }
90        for (int j = 0; j < fontFamilies[i]->fFonts.count(); ++j) {
91            const FontFileInfo& ffi = fontFamilies[i]->fFonts[j];
92            SkDebugf("  file (%d) %s#%d", ffi.fWeight, ffi.fFileName.c_str(), ffi.fIndex);
93            for (const auto& coordinate : ffi.fVariationDesignPosition) {
94                SkDebugf(" @'%c%c%c%c'=%f",
95                         (coordinate.axis >> 24) & 0xFF,
96                         (coordinate.axis >> 16) & 0xFF,
97                         (coordinate.axis >>  8) & 0xFF,
98                         (coordinate.axis      ) & 0xFF,
99                         coordinate.value);
100            }
101            SkDebugf("\n");
102        }
103    }
104    SkDebugf("\n\n");
105}
106
107template <int N, typename T> static double test_parse_fixed_r(skiatest::Reporter* reporter,
108                                                              double low, double high, double inc)
109{
110    double SK_FixedMax_double = nextafter(1 << (sizeof(T) * CHAR_BIT - N - 1), 0.0);
111    double SK_FixedEpsilon_double = (1.0 / (1 << N));
112    double maxError = 0;
113    char buffer[64];
114    for (double f = low; f < high; f += inc) {
115        SkString s;
116        // 'sprintf' formatting as expected depends on the current locale being "C".
117        // We currently expect tests and tools to run in the "C" locale.
118        sprintf(buffer, "%.20f", f);
119        T fix;
120        bool b = parse_fixed<N>(buffer, &fix);
121        if (b) {
122            double f2 = fix * SK_FixedEpsilon_double;
123            double error = fabs(f - f2);
124            REPORTER_ASSERT(reporter,  error <= SK_FixedEpsilon_double);
125            maxError = SkTMax(maxError, error);
126        } else {
127            REPORTER_ASSERT(reporter, f < -SK_FixedMax_double || SK_FixedMax_double < f);
128        }
129    }
130
131    //SkDebugf("maxError: %.20f\n", maxError);
132    return maxError;
133}
134
135static void test_parse_fixed(skiatest::Reporter* reporter) {
136    test_parse_fixed_r<27, int32_t>(reporter, -8.1, -7.9, 0.000001);
137    test_parse_fixed_r<27, int32_t>(reporter, -0.1, 0.1, 0.000001);
138    test_parse_fixed_r<27, int32_t>(reporter, 7.9, 8.1, 0.000001);
139    test_parse_fixed_r<16, int32_t>(reporter, -0.125, 0.125, 1.0 / (1 << 19));
140    test_parse_fixed_r<16, int32_t>(reporter, -32768.125, -32766.875, 1.0 / (1 << 17));
141    test_parse_fixed_r<16, int32_t>(reporter, 32766.875, 32768.125, 1.0 / (1 << 17));
142    test_parse_fixed_r<16, int32_t>(reporter, -1.1, 1.1, 0.0001);
143
144    SkFixed fix;
145    REPORTER_ASSERT(reporter, !parse_fixed<27>("-17.1", &fix));
146    REPORTER_ASSERT(reporter, !parse_fixed<16>("32768", &fix));
147    REPORTER_ASSERT(reporter, !parse_fixed<16>("", &fix));
148    REPORTER_ASSERT(reporter, !parse_fixed<16>(".", &fix));
149    REPORTER_ASSERT(reporter, !parse_fixed<16>("123.", &fix));
150    REPORTER_ASSERT(reporter, !parse_fixed<16>("a", &fix));
151    REPORTER_ASSERT(reporter, !parse_fixed<16>(".123a", &fix));
152}
153
154DEF_TEST(FontMgrAndroidParser, reporter) {
155    test_parse_fixed(reporter);
156
157    bool resourcesMissing = false;
158
159    SkTDArray<FontFamily*> preV17FontFamilies;
160    SkFontMgr_Android_Parser::GetCustomFontFamilies(preV17FontFamilies,
161        SkString("/custom/font/path/"),
162        GetResourcePath("android_fonts/pre_v17/system_fonts.xml").c_str(),
163        GetResourcePath("android_fonts/pre_v17/fallback_fonts.xml").c_str());
164
165    if (preV17FontFamilies.count() > 0) {
166        REPORTER_ASSERT(reporter, preV17FontFamilies.count() == 14);
167        REPORTER_ASSERT(reporter, CountFallbacks(preV17FontFamilies) == 10);
168
169        DumpLoadedFonts(preV17FontFamilies, "pre version 17");
170        ValidateLoadedFonts(preV17FontFamilies, "Roboto-Regular.ttf", reporter);
171    } else {
172        resourcesMissing = true;
173    }
174    preV17FontFamilies.deleteAll();
175
176
177    SkTDArray<FontFamily*> v17FontFamilies;
178    SkFontMgr_Android_Parser::GetCustomFontFamilies(v17FontFamilies,
179        SkString("/custom/font/path/"),
180        GetResourcePath("android_fonts/v17/system_fonts.xml").c_str(),
181        GetResourcePath("android_fonts/v17/fallback_fonts.xml").c_str(),
182        GetResourcePath("android_fonts/v17").c_str());
183
184    if (v17FontFamilies.count() > 0) {
185        REPORTER_ASSERT(reporter, v17FontFamilies.count() == 56);
186        REPORTER_ASSERT(reporter, CountFallbacks(v17FontFamilies) == 46);
187
188        DumpLoadedFonts(v17FontFamilies, "version 17");
189        ValidateLoadedFonts(v17FontFamilies, "Roboto-Regular.ttf", reporter);
190    } else {
191        resourcesMissing = true;
192    }
193    v17FontFamilies.deleteAll();
194
195
196    SkTDArray<FontFamily*> v22FontFamilies;
197    SkFontMgr_Android_Parser::GetCustomFontFamilies(v22FontFamilies,
198        SkString("/custom/font/path/"),
199        GetResourcePath("android_fonts/v22/fonts.xml").c_str(),
200        nullptr);
201
202    if (v22FontFamilies.count() > 0) {
203        REPORTER_ASSERT(reporter, v22FontFamilies.count() == 54);
204        REPORTER_ASSERT(reporter, CountFallbacks(v22FontFamilies) == 42);
205
206        DumpLoadedFonts(v22FontFamilies, "version 22");
207        ValidateLoadedFonts(v22FontFamilies, "Roboto-Thin.ttf", reporter);
208    } else {
209        resourcesMissing = true;
210    }
211    v22FontFamilies.deleteAll();
212
213    if (resourcesMissing) {
214        SkDebugf("---- Resource files missing for FontConfigParser test\n");
215    }
216}
217