bcbc1788b4
This idea emerged while doing https://codereview.chromium.org/321723002/
(commit 880914c35c).
BUG=None
TEST=make tests && out/Debug/tests
R=mtklein@google.com
Author: tfarina@chromium.org
Review URL: https://codereview.chromium.org/346453002
310 lines
11 KiB
C++
310 lines
11 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Resources.h"
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#include "SkEndian.h"
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#include "SkFontStream.h"
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#include "SkOSFile.h"
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#include "SkPaint.h"
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#include "SkStream.h"
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#include "SkTypeface.h"
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#include "Test.h"
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//#define DUMP_TABLES
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//#define DUMP_TTC_TABLES
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#define kFontTableTag_head SkSetFourByteTag('h', 'e', 'a', 'd')
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#define kFontTableTag_hhea SkSetFourByteTag('h', 'h', 'e', 'a')
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#define kFontTableTag_maxp SkSetFourByteTag('m', 'a', 'x', 'p')
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static const struct TagSize {
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SkFontTableTag fTag;
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size_t fSize;
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} gKnownTableSizes[] = {
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{ kFontTableTag_head, 54 },
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{ kFontTableTag_hhea, 36 },
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{ kFontTableTag_maxp, 32 },
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};
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// Test that getUnitsPerEm() agrees with a direct lookup in the 'head' table
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// (if that table is available).
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static void test_unitsPerEm(skiatest::Reporter* reporter, SkTypeface* face) {
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int nativeUPEM = face->getUnitsPerEm();
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int tableUPEM = -1;
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size_t size = face->getTableSize(kFontTableTag_head);
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if (size) {
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// unitsPerEm is at offset 18 into the 'head' table.
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uint16_t rawUPEM;
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face->getTableData(kFontTableTag_head, 18, sizeof(rawUPEM), &rawUPEM);
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tableUPEM = SkEndian_SwapBE16(rawUPEM);
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}
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if (tableUPEM >= 0) {
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REPORTER_ASSERT(reporter, tableUPEM == nativeUPEM);
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}
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}
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// Test that countGlyphs() agrees with a direct lookup in the 'maxp' table
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// (if that table is available).
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static void test_countGlyphs(skiatest::Reporter* reporter, SkTypeface* face) {
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int nativeGlyphs = face->countGlyphs();
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int tableGlyphs = -1;
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size_t size = face->getTableSize(kFontTableTag_maxp);
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if (size) {
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// glyphs is at offset 4 into the 'maxp' table.
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uint16_t rawGlyphs;
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face->getTableData(kFontTableTag_maxp, 4, sizeof(rawGlyphs), &rawGlyphs);
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tableGlyphs = SkEndian_SwapBE16(rawGlyphs);
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}
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if (tableGlyphs >= 0) {
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REPORTER_ASSERT(reporter, tableGlyphs == nativeGlyphs);
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}
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}
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// The following three are all the same code points in various encodings.
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static uint8_t utf8Chars[] = { 0x61, 0xE4, 0xB8, 0xAD, 0xD0, 0xAF, 0xD7, 0x99, 0xD7, 0x95, 0xF0, 0x9D, 0x84, 0x9E, 0x61 };
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static uint16_t utf16Chars[] = { 0x0061, 0x4E2D, 0x042F, 0x05D9, 0x05D5, 0xD834, 0xDD1E, 0x0061 };
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static uint32_t utf32Chars[] = { 0x00000061, 0x00004E2D, 0x0000042F, 0x000005D9, 0x000005D5, 0x0001D11E, 0x00000061 };
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struct CharsToGlyphs_TestData {
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const void* chars;
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int charCount;
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size_t charsByteLength;
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SkTypeface::Encoding typefaceEncoding;
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const char* name;
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} static charsToGlyphs_TestData[] = {
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{ utf8Chars, 7, sizeof(utf8Chars), SkTypeface::kUTF8_Encoding, "Simple UTF-8" },
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{ utf16Chars, 7, sizeof(utf16Chars), SkTypeface::kUTF16_Encoding, "Simple UTF-16" },
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{ utf32Chars, 7, sizeof(utf32Chars), SkTypeface::kUTF32_Encoding, "Simple UTF-32" },
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};
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// Test that SkPaint::textToGlyphs agrees with SkTypeface::charsToGlyphs.
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static void test_charsToGlyphs(skiatest::Reporter* reporter, SkTypeface* face) {
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uint16_t paintGlyphIds[256];
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uint16_t faceGlyphIds[256];
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for (size_t testIndex = 0; testIndex < SK_ARRAY_COUNT(charsToGlyphs_TestData); ++testIndex) {
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CharsToGlyphs_TestData& test = charsToGlyphs_TestData[testIndex];
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SkPaint paint;
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paint.setTypeface(face);
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paint.setTextEncoding((SkPaint::TextEncoding)test.typefaceEncoding);
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paint.textToGlyphs(test.chars, test.charsByteLength, paintGlyphIds);
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face->charsToGlyphs(test.chars, test.typefaceEncoding, faceGlyphIds, test.charCount);
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for (int i = 0; i < test.charCount; ++i) {
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SkString name;
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face->getFamilyName(&name);
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SkString a;
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a.appendf("%s, paintGlyphIds[%d] = %d, faceGlyphIds[%d] = %d, face = %s",
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test.name, i, (int)paintGlyphIds[i], i, (int)faceGlyphIds[i], name.c_str());
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REPORTER_ASSERT_MESSAGE(reporter, paintGlyphIds[i] == faceGlyphIds[i], a.c_str());
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}
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}
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}
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static void test_fontstream(skiatest::Reporter* reporter,
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SkStream* stream, int ttcIndex) {
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int n = SkFontStream::GetTableTags(stream, ttcIndex, NULL);
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SkAutoTArray<SkFontTableTag> array(n);
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int n2 = SkFontStream::GetTableTags(stream, ttcIndex, array.get());
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REPORTER_ASSERT(reporter, n == n2);
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for (int i = 0; i < n; ++i) {
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#ifdef DUMP_TTC_TABLES
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SkString str;
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SkFontTableTag t = array[i];
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str.appendUnichar((t >> 24) & 0xFF);
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str.appendUnichar((t >> 16) & 0xFF);
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str.appendUnichar((t >> 8) & 0xFF);
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str.appendUnichar((t >> 0) & 0xFF);
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SkDebugf("[%d:%d] '%s'\n", ttcIndex, i, str.c_str());
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#endif
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size_t size = SkFontStream::GetTableSize(stream, ttcIndex, array[i]);
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for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
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if (gKnownTableSizes[j].fTag == array[i]) {
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REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
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}
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}
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}
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}
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static void test_fontstream(skiatest::Reporter* reporter, SkStream* stream) {
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int count = SkFontStream::CountTTCEntries(stream);
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#ifdef DUMP_TTC_TABLES
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SkDebugf("CountTTCEntries %d\n", count);
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#endif
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for (int i = 0; i < count; ++i) {
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test_fontstream(reporter, stream, i);
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}
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}
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static void test_fontstream(skiatest::Reporter* reporter) {
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// This test cannot run if there is no resource path.
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SkString resourcePath = GetResourcePath();
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if (resourcePath.isEmpty()) {
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SkDebugf("Could not run fontstream test because resourcePath not specified.");
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return;
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}
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SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(), "test.ttc");
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SkFILEStream stream(filename.c_str());
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if (stream.isValid()) {
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test_fontstream(reporter, &stream);
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} else {
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SkDebugf("Could not run fontstream test because test.ttc not found.");
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}
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}
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static void test_tables(skiatest::Reporter* reporter, SkTypeface* face) {
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if (false) { // avoid bit rot, suppress warning
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SkFontID fontID = face->uniqueID();
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REPORTER_ASSERT(reporter, fontID);
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}
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int count = face->countTables();
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SkAutoTMalloc<SkFontTableTag> storage(count);
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SkFontTableTag* tags = storage.get();
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int count2 = face->getTableTags(tags);
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REPORTER_ASSERT(reporter, count2 == count);
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for (int i = 0; i < count; ++i) {
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size_t size = face->getTableSize(tags[i]);
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REPORTER_ASSERT(reporter, size > 0);
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#ifdef DUMP_TABLES
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char name[5];
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name[0] = (tags[i] >> 24) & 0xFF;
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name[1] = (tags[i] >> 16) & 0xFF;
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name[2] = (tags[i] >> 8) & 0xFF;
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name[3] = (tags[i] >> 0) & 0xFF;
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name[4] = 0;
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SkDebugf("%s %d\n", name, size);
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#endif
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for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
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if (gKnownTableSizes[j].fTag == tags[i]) {
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REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
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}
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}
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// do we get the same size from GetTableData and GetTableSize
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{
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SkAutoMalloc data(size);
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size_t size2 = face->getTableData(tags[i], 0, size, data.get());
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REPORTER_ASSERT(reporter, size2 == size);
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}
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}
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}
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static void test_tables(skiatest::Reporter* reporter) {
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static const char* const gNames[] = {
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NULL, // default font
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"Arial", "Times", "Times New Roman", "Helvetica", "Courier",
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"Courier New", "Terminal", "MS Sans Serif",
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
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SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(gNames[i], SkTypeface::kNormal));
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if (face) {
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#ifdef DUMP_TABLES
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SkDebugf("%s\n", gNames[i]);
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#endif
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test_tables(reporter, face);
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test_unitsPerEm(reporter, face);
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test_countGlyphs(reporter, face);
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test_charsToGlyphs(reporter, face);
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}
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}
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}
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/*
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* Verifies that the advance values returned by generateAdvance and
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* generateMetrics match.
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*/
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static void test_advances(skiatest::Reporter* reporter) {
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static const char* const faces[] = {
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NULL, // default font
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"Arial", "Times", "Times New Roman", "Helvetica", "Courier",
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"Courier New", "Verdana", "monospace",
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};
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static const struct {
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SkPaint::Hinting hinting;
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unsigned flags;
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} settings[] = {
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{ SkPaint::kNo_Hinting, 0 },
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{ SkPaint::kNo_Hinting, SkPaint::kLinearText_Flag },
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{ SkPaint::kNo_Hinting, SkPaint::kSubpixelText_Flag },
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{ SkPaint::kSlight_Hinting, 0 },
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{ SkPaint::kSlight_Hinting, SkPaint::kLinearText_Flag },
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{ SkPaint::kSlight_Hinting, SkPaint::kSubpixelText_Flag },
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{ SkPaint::kNormal_Hinting, 0 },
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{ SkPaint::kNormal_Hinting, SkPaint::kLinearText_Flag },
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{ SkPaint::kNormal_Hinting, SkPaint::kSubpixelText_Flag },
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};
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static const struct {
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SkScalar fScaleX;
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SkScalar fSkewX;
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} gScaleRec[] = {
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{ SK_Scalar1, 0 },
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{ SK_Scalar1/2, 0 },
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// these two exercise obliquing (skew)
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{ SK_Scalar1, -SK_Scalar1/4 },
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{ SK_Scalar1/2, -SK_Scalar1/4 },
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};
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SkPaint paint;
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char txt[] = "long.text.with.lots.of.dots.";
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for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) {
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SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(faces[i], SkTypeface::kNormal));
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paint.setTypeface(face);
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for (size_t j = 0; j < SK_ARRAY_COUNT(settings); j++) {
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paint.setHinting(settings[j].hinting);
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paint.setLinearText((settings[j].flags & SkPaint::kLinearText_Flag) != 0);
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paint.setSubpixelText((settings[j].flags & SkPaint::kSubpixelText_Flag) != 0);
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for (size_t k = 0; k < SK_ARRAY_COUNT(gScaleRec); ++k) {
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paint.setTextScaleX(gScaleRec[k].fScaleX);
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paint.setTextSkewX(gScaleRec[k].fSkewX);
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SkRect bounds;
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// For no hinting and light hinting this should take the
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// optimized generateAdvance path.
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SkScalar width1 = paint.measureText(txt, strlen(txt));
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// Requesting the bounds forces a generateMetrics call.
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SkScalar width2 = paint.measureText(txt, strlen(txt), &bounds);
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// SkDebugf("Font: %s, generateAdvance: %f, generateMetrics: %f\n",
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// faces[i], SkScalarToFloat(width1), SkScalarToFloat(width2));
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REPORTER_ASSERT(reporter, width1 == width2);
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}
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}
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}
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}
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DEF_TEST(FontHost, reporter) {
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test_tables(reporter);
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test_fontstream(reporter);
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test_advances(reporter);
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}
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// need tests for SkStrSearch
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