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skia2/tests/FontMgrAndroidParserTest.cpp
bungeman 47a1e96b95 Deduplicate axis value resolving code. 
The code was originally written for Android, but is now implemented
more generally by the FreeType scanner to be shared between all
FreeType backed typefaces. This removes the now duplicate code in the
Android font manager and uses the shared code instead.

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1726213004

Review URL: https://codereview.chromium.org/1726213004
2016-02-25 11:20:01 -08:00

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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkCommandLineFlags.h"
#include "SkFontMgr_android_parser.h"
#include "Test.h"
#include <cmath>
#include <cstdio>
DECLARE_bool(verboseFontMgr);
int CountFallbacks(SkTDArray<FontFamily*> fontFamilies) {
int countOfFallbackFonts = 0;
for (int i = 0; i < fontFamilies.count(); i++) {
if (fontFamilies[i]->fIsFallbackFont) {
countOfFallbackFonts++;
}
}
return countOfFallbackFonts;
}
//https://tools.ietf.org/html/rfc5234#appendix-B.1
static bool isALPHA(int c) {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
}
//https://tools.ietf.org/html/rfc5234#appendix-B.1
static bool isDIGIT(int c) {
return ('0' <= c && c <= '9');
}
void ValidateLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* firstExpectedFile,
skiatest::Reporter* reporter) {
REPORTER_ASSERT(reporter, fontFamilies[0]->fNames.count() == 5);
REPORTER_ASSERT(reporter, !strcmp(fontFamilies[0]->fNames[0].c_str(), "sans-serif"));
REPORTER_ASSERT(reporter,
!strcmp(fontFamilies[0]->fFonts[0].fFileName.c_str(), firstExpectedFile));
REPORTER_ASSERT(reporter, !fontFamilies[0]->fIsFallbackFont);
// Check that the languages are all sane.
for (int i = 0; i < fontFamilies.count(); ++i) {
const SkString& lang = fontFamilies[i]->fLanguage.getTag();
for (size_t j = 0; j < lang.size(); ++j) {
int c = lang[j];
REPORTER_ASSERT(reporter, isALPHA(c) || isDIGIT(c) || '-' == c);
}
}
// All file names in the test configuration files start with a capital letter.
// This is not a general requirement, but it is true of all the test configuration data.
// Verifying ensures the filenames have been read sanely and have not been 'sliced'.
for (int i = 0; i < fontFamilies.count(); ++i) {
FontFamily& family = *fontFamilies[i];
for (int j = 0; j < family.fFonts.count(); ++j) {
FontFileInfo& file = family.fFonts[j];
REPORTER_ASSERT(reporter, !file.fFileName.isEmpty() &&
file.fFileName[0] >= 'A' &&
file.fFileName[0] <= 'Z');
}
}
}
void DumpLoadedFonts(SkTDArray<FontFamily*> fontFamilies, const char* label) {
if (!FLAGS_verboseFontMgr) {
return;
}
SkDebugf("\n--- Dumping %s\n", label);
for (int i = 0; i < fontFamilies.count(); ++i) {
SkDebugf("Family %d:\n", i);
switch(fontFamilies[i]->fVariant) {
case kElegant_FontVariant: SkDebugf(" elegant\n"); break;
case kCompact_FontVariant: SkDebugf(" compact\n"); break;
default: break;
}
SkDebugf(" basePath %s\n", fontFamilies[i]->fBasePath.c_str());
if (!fontFamilies[i]->fLanguage.getTag().isEmpty()) {
SkDebugf(" language %s\n", fontFamilies[i]->fLanguage.getTag().c_str());
}
for (int j = 0; j < fontFamilies[i]->fNames.count(); ++j) {
SkDebugf(" name %s\n", fontFamilies[i]->fNames[j].c_str());
}
for (int j = 0; j < fontFamilies[i]->fFonts.count(); ++j) {
const FontFileInfo& ffi = fontFamilies[i]->fFonts[j];
SkDebugf(" file (%d) %s#%d", ffi.fWeight, ffi.fFileName.c_str(), ffi.fIndex);
for (const auto& axis : ffi.fAxes) {
SkDebugf(" @'%c%c%c%c'=%f",
(axis.fTag >> 24) & 0xFF,
(axis.fTag >> 16) & 0xFF,
(axis.fTag >> 8) & 0xFF,
(axis.fTag ) & 0xFF,
axis.fStyleValue);
}
SkDebugf("\n");
}
}
SkDebugf("\n\n");
}
template <int N, typename T> static double test_parse_fixed_r(skiatest::Reporter* reporter,
double low, double high, double inc)
{
double SK_FixedMax_double = nextafter(1 << (sizeof(T) * CHAR_BIT - N - 1), 0.0);
double SK_FixedEpsilon_double = (1.0 / (1 << N));
double maxError = 0;
char buffer[64];
for (double f = low; f < high; f += inc) {
SkString s;
// 'sprintf' formatting as expected depends on the current locale being "C".
// We currently expect tests and tools to run in the "C" locale.
sprintf(buffer, "%.20f", f);
T fix;
bool b = parse_fixed<N>(buffer, &fix);
if (b) {
double f2 = fix * SK_FixedEpsilon_double;
double error = fabs(f - f2);
REPORTER_ASSERT(reporter, error <= SK_FixedEpsilon_double);
maxError = SkTMax(maxError, error);
} else {
REPORTER_ASSERT(reporter, f < -SK_FixedMax_double || SK_FixedMax_double < f);
}
}
//SkDebugf("maxError: %.20f\n", maxError);
return maxError;
}
static void test_parse_fixed(skiatest::Reporter* reporter) {
test_parse_fixed_r<27, int32_t>(reporter, -8.1, -7.9, 0.000001);
test_parse_fixed_r<27, int32_t>(reporter, -0.1, 0.1, 0.000001);
test_parse_fixed_r<27, int32_t>(reporter, 7.9, 8.1, 0.000001);
test_parse_fixed_r<16, int32_t>(reporter, -0.125, 0.125, 1.0 / (1 << 19));
test_parse_fixed_r<16, int32_t>(reporter, -32768.125, -32766.875, 1.0 / (1 << 17));
test_parse_fixed_r<16, int32_t>(reporter, 32766.875, 32768.125, 1.0 / (1 << 17));
test_parse_fixed_r<16, int32_t>(reporter, -1.1, 1.1, 0.0001);
SkFixed fix;
REPORTER_ASSERT(reporter, !parse_fixed<27>("-17.1", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>("32768", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>("", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>(".", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>("123.", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>("a", &fix));
REPORTER_ASSERT(reporter, !parse_fixed<16>(".123a", &fix));
}
DEF_TEST(FontMgrAndroidParser, reporter) {
test_parse_fixed(reporter);
bool resourcesMissing = false;
SkTDArray<FontFamily*> preV17FontFamilies;
SkFontMgr_Android_Parser::GetCustomFontFamilies(preV17FontFamilies,
SkString("/custom/font/path/"),
GetResourcePath("android_fonts/pre_v17/system_fonts.xml").c_str(),
GetResourcePath("android_fonts/pre_v17/fallback_fonts.xml").c_str());
if (preV17FontFamilies.count() > 0) {
REPORTER_ASSERT(reporter, preV17FontFamilies.count() == 14);
REPORTER_ASSERT(reporter, CountFallbacks(preV17FontFamilies) == 10);
DumpLoadedFonts(preV17FontFamilies, "pre version 17");
ValidateLoadedFonts(preV17FontFamilies, "Roboto-Regular.ttf", reporter);
} else {
resourcesMissing = true;
}
preV17FontFamilies.deleteAll();
SkTDArray<FontFamily*> v17FontFamilies;
SkFontMgr_Android_Parser::GetCustomFontFamilies(v17FontFamilies,
SkString("/custom/font/path/"),
GetResourcePath("android_fonts/v17/system_fonts.xml").c_str(),
GetResourcePath("android_fonts/v17/fallback_fonts.xml").c_str(),
GetResourcePath("android_fonts/v17").c_str());
if (v17FontFamilies.count() > 0) {
REPORTER_ASSERT(reporter, v17FontFamilies.count() == 56);
REPORTER_ASSERT(reporter, CountFallbacks(v17FontFamilies) == 46);
DumpLoadedFonts(v17FontFamilies, "version 17");
ValidateLoadedFonts(v17FontFamilies, "Roboto-Regular.ttf", reporter);
} else {
resourcesMissing = true;
}
v17FontFamilies.deleteAll();
SkTDArray<FontFamily*> v22FontFamilies;
SkFontMgr_Android_Parser::GetCustomFontFamilies(v22FontFamilies,
SkString("/custom/font/path/"),
GetResourcePath("android_fonts/v22/fonts.xml").c_str(),
nullptr);
if (v22FontFamilies.count() > 0) {
REPORTER_ASSERT(reporter, v22FontFamilies.count() == 54);
REPORTER_ASSERT(reporter, CountFallbacks(v22FontFamilies) == 42);
DumpLoadedFonts(v22FontFamilies, "version 22");
ValidateLoadedFonts(v22FontFamilies, "Roboto-Thin.ttf", reporter);
} else {
resourcesMissing = true;
}
v22FontFamilies.deleteAll();
if (resourcesMissing) {
SkDebugf("---- Resource files missing for FontConfigParser test\n");
}
}
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