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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "minikin/FontFileParser.h"
#include <gtest/gtest.h>
#include "FontTestUtils.h"
#include "FreeTypeMinikinFontForTest.h"
#include "PathUtils.h"
namespace minikin {
namespace {
static size_t writeU16(uint16_t x, uint8_t* out, size_t offset) {
out[offset] = x >> 8;
out[offset + 1] = x;
return offset + 2;
}
static size_t writeU32(uint32_t x, uint8_t* out, size_t offset) {
out[offset] = x >> 24;
out[offset + 1] = x >> 16;
out[offset + 2] = x >> 8;
out[offset + 3] = x;
return offset + 4;
}
class TestableFontFileParser : public FontFileParser {
public:
using FontFileParser::analyzeFontRevision;
using FontFileParser::checkPSName;
};
// Returns valid head table contents.
static std::vector<uint8_t> buildHeadTable(uint32_t fontRevision) {
std::vector<uint8_t> out(46);
size_t head = writeU16(1, out.data(), 0); // major version
head = writeU16(0, out.data(), head); // minor version
head = writeU32(fontRevision, out.data(), head); // fontRevision
head = writeU32(0xB1B0AFBA, out.data(), head); // checksum. (random value)
head = writeU32(0x5F0F3CF5, out.data(), head); // magicNumber
head = writeU16(0, out.data(), head); // flasgs
head = writeU16(1024, out.data(), head); // unitsPerEm
head = writeU32(123457890, out.data(), head); // created (random value)
head = writeU32(123457890, out.data(), head); // modified (random value)
head = writeU16(0, out.data(), head); // xMin
head = writeU16(100, out.data(), head); // yMin
head = writeU16(1024, out.data(), head); // xMax
head = writeU16(2048, out.data(), head); // yMax
head = writeU16(0, out.data(), head); // macStyle
head = writeU16(10, out.data(), head); // lowestRecPPEM
head = writeU16(1, out.data(), head); // fontDirectionHint
head = writeU16(1, out.data(), head); // indexToLocFormat
head = writeU16(0, out.data(), head); // glyphDataFormat;
return out;
}
TEST(FontFileParserTest, analyzeFontRevision) {
uint32_t rev = 0x12345678;
std::vector<uint8_t> head = buildHeadTable(rev);
uint32_t out = 0;
EXPECT_TRUE(TestableFontFileParser::analyzeFontRevision(head.data(), head.size(), &out));
EXPECT_EQ(rev, out);
}
TEST(FontFileParserTest, headInvalidLength) {
uint32_t rev = 0x12345678;
std::vector<uint8_t> head = buildHeadTable(rev);
uint32_t out = 0;
EXPECT_FALSE(TestableFontFileParser::analyzeFontRevision(head.data(), 6, &out));
}
TEST(FontFileParserTest, parseFontForRev) {
auto minikinFont = std::make_shared<FreeTypeMinikinFontForTest>(getTestFontPath("Ascii.ttf"));
auto parser = FontFileParser(minikinFont->GetFontData(), minikinFont->GetFontSize(), 0);
auto revision = parser.getFontRevision();
EXPECT_TRUE(revision.has_value());
EXPECT_EQ(0x00010000u, revision.value());
}
TEST(FontFileParser, checkPSName) {
EXPECT_TRUE(TestableFontFileParser::checkPSName("Roboto-Regular"));
EXPECT_TRUE(TestableFontFileParser::checkPSName("NotoColorEmoji"));
// Space character is not allowed.
EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto Regular"));
EXPECT_FALSE(TestableFontFileParser::checkPSName("Noto Color Emoji"));
// parens are not not allowed.
EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto (Regular)"));
EXPECT_FALSE(TestableFontFileParser::checkPSName("Noto <Color> {Emoji}"));
// control characters are not allowed
EXPECT_FALSE(TestableFontFileParser::checkPSName("Roboto-Regular\b"));
EXPECT_FALSE(TestableFontFileParser::checkPSName("NotoColorEmoji\t"));
// Up to 63 character is allowed.
EXPECT_FALSE(TestableFontFileParser::checkPSName(std::string(64, 'a')));
// Only printable ASCII is allowed.
EXPECT_FALSE(TestableFontFileParser::checkPSName("ろぼとふぉんと"));
}
TEST(FontFileParserTest, parseFontForPSName) {
auto minikinFont = std::make_shared<FreeTypeMinikinFontForTest>(getTestFontPath("Ascii.ttf"));
auto parser = FontFileParser(minikinFont->GetFontData(), minikinFont->GetFontSize(), 0);
auto psName = parser.getPostScriptName();
EXPECT_TRUE(psName.has_value());
EXPECT_EQ("SampleFont-Regular", psName.value());
}
} // namespace
} // namespace minikin
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