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skia2/tests/TypefaceTest.cpp
Mike Reed 40d9c5162f Fix font creation lost style on Mac 
On Mac 10.11, when creating a font from its name and style by using a
font descriptor, sometimes the created font lost the style. To work
around this problem, we check the font style after the creation, if
it is not correct, we will resort to font creation with symbolic traits
which creates the correct font.

BUG=skia:8447
BUG=874103

Change-Id: I8b57e5a81d0d19d9fb0a7bd2951de75f2c41e236
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/172200
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2019-06-10 18:40:28 +00:00

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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkData.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkStream.h"
#include "include/core/SkTypeface.h"
#include "include/ports/SkTypeface_win.h"
#include "include/private/SkFixed.h"
#include "src/core/SkAdvancedTypefaceMetrics.h"
#include "src/core/SkFontDescriptor.h"
#include "src/core/SkFontMgrPriv.h"
#include "src/core/SkFontPriv.h"
#include "src/core/SkMakeUnique.h"
#include "src/core/SkTypefaceCache.h"
#include "src/sfnt/SkOTTable_OS_2.h"
#include "src/sfnt/SkSFNTHeader.h"
#include "src/utils/SkUTF.h"
#include "tests/Test.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/TestEmptyTypeface.h"
#include <memory>
static void TypefaceStyle_test(skiatest::Reporter* reporter,
uint16_t weight, uint16_t width, SkData* data)
{
sk_sp<SkData> dataCopy;
if (!data->unique()) {
dataCopy = SkData::MakeWithCopy(data->data(), data->size());
data = dataCopy.get();
}
SkSFNTHeader* sfntHeader = static_cast<SkSFNTHeader*>(data->writable_data());
SkSFNTHeader::TableDirectoryEntry* tableEntry =
SkTAfter<SkSFNTHeader::TableDirectoryEntry>(sfntHeader);
SkSFNTHeader::TableDirectoryEntry* os2TableEntry = nullptr;
int numTables = SkEndian_SwapBE16(sfntHeader->numTables);
for (int tableEntryIndex = 0; tableEntryIndex < numTables; ++tableEntryIndex) {
if (SkOTTableOS2::TAG == tableEntry[tableEntryIndex].tag) {
os2TableEntry = tableEntry + tableEntryIndex;
break;
}
}
SkASSERT_RELEASE(os2TableEntry);
size_t os2TableOffset = SkEndian_SwapBE32(os2TableEntry->offset);
SkOTTableOS2_V0* os2Table = SkTAddOffset<SkOTTableOS2_V0>(sfntHeader, os2TableOffset);
os2Table->usWeightClass.value = SkEndian_SwapBE16(weight);
using WidthType = SkOTTableOS2_V0::WidthClass::Value;
os2Table->usWidthClass.value = static_cast<WidthType>(SkEndian_SwapBE16(width));
sk_sp<SkTypeface> newTypeface(SkTypeface::MakeFromData(sk_ref_sp(data)));
if (!newTypeface) {
// Not all SkFontMgr can MakeFromStream().
return;
}
SkFontStyle newStyle = newTypeface->fontStyle();
//printf("%d, %f\n", weight, (newStyle.weight() - (float)0x7FFF) / (float)0x7FFF);
//printf("%d, %f\n", width , (newStyle.width() - (float)0x7F) / (float)0x7F);
//printf("%d, %d\n", weight, newStyle.weight());
//printf("%d, %d\n", width , newStyle.width());
// Some back-ends (CG, GDI, DW) support OS/2 version A which uses 0 - 10 (but all differently).
REPORTER_ASSERT(reporter,
newStyle.weight() == weight ||
(weight <= 10 && newStyle.weight() == 100 * weight) ||
(weight == 4 && newStyle.weight() == 350) || // GDI weirdness
(weight == 5 && newStyle.weight() == 400) || // GDI weirdness
(weight == 0 && newStyle.weight() == 1) || // DW weirdness
(weight == 1000 && newStyle.weight() == 999) // DW weirdness
);
// Some back-ends (GDI) don't support width, ensure these always report 'medium'.
REPORTER_ASSERT(reporter,
newStyle.width() == width ||
newStyle.width() == 5);
}
DEF_TEST(TypefaceStyle, reporter) {
std::unique_ptr<SkStreamAsset> stream(GetResourceAsStream("fonts/Em.ttf"));
if (!stream) {
REPORT_FAILURE(reporter, "fonts/Em.ttf", SkString("Cannot load resource"));
return;
}
sk_sp<SkData> data(SkData::MakeFromStream(stream.get(), stream->getLength()));
using SkFS = SkFontStyle;
for (int weight = SkFS::kInvisible_Weight; weight <= SkFS::kExtraBlack_Weight; ++weight) {
TypefaceStyle_test(reporter, weight, 5, data.get());
}
for (int width = SkFS::kUltraCondensed_Width; width <= SkFS::kUltraExpanded_Width; ++width) {
TypefaceStyle_test(reporter, 400, width, data.get());
}
}
DEF_TEST(TypefaceRoundTrip, reporter) {
sk_sp<SkTypeface> typeface(MakeResourceAsTypeface("fonts/7630.otf"));
if (!typeface) {
// Not all SkFontMgr can MakeFromStream().
return;
}
int fontIndex;
std::unique_ptr<SkStreamAsset> stream = typeface->openStream(&fontIndex);
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
sk_sp<SkTypeface> typeface2 = fm->makeFromStream(std::move(stream), fontIndex);
REPORTER_ASSERT(reporter, typeface2);
}
DEF_TEST(FontDescriptorNegativeVariationSerialize, reporter) {
SkFontDescriptor desc;
SkFixed axis = -SK_Fixed1;
auto font = skstd::make_unique<SkMemoryStream>("a", 1, false);
desc.setFontData(skstd::make_unique<SkFontData>(std::move(font), 0, &axis, 1));
SkDynamicMemoryWStream stream;
desc.serialize(&stream);
SkFontDescriptor descD;
SkFontDescriptor::Deserialize(stream.detachAsStream().get(), &descD);
std::unique_ptr<SkFontData> fontData = descD.detachFontData();
if (!fontData) {
REPORT_FAILURE(reporter, "fontData", SkString());
return;
}
if (fontData->getAxisCount() != 1) {
REPORT_FAILURE(reporter, "fontData->getAxisCount() != 1", SkString());
return;
}
REPORTER_ASSERT(reporter, fontData->getAxis()[0] == -SK_Fixed1);
};
DEF_TEST(TypefaceAxes, reporter) {
std::unique_ptr<SkStreamAsset> distortable(GetResourceAsStream("fonts/Distortable.ttf"));
if (!distortable) {
REPORT_FAILURE(reporter, "distortable", SkString());
return;
}
constexpr int numberOfAxesInDistortable = 1;
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
// The position may be over specified. If there are multiple values for a given axis,
// ensure the last one since that's what css-fonts-4 requires.
const SkFontArguments::VariationPosition::Coordinate position[] = {
{ SkSetFourByteTag('w','g','h','t'), 1.618033988749895f },
{ SkSetFourByteTag('w','g','h','t'), SK_ScalarSqrt2 },
};
SkFontArguments params;
params.setVariationDesignPosition({position, SK_ARRAY_COUNT(position)});
// TODO: if axes are set and the back-end doesn't support them, should we create the typeface?
sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(distortable), params);
if (!typeface) {
// Not all SkFontMgr can makeFromStream().
return;
}
int count = typeface->getVariationDesignPosition(nullptr, 0);
if (count == -1) {
return;
}
REPORTER_ASSERT(reporter, count == numberOfAxesInDistortable);
SkFontArguments::VariationPosition::Coordinate positionRead[numberOfAxesInDistortable];
count = typeface->getVariationDesignPosition(positionRead, SK_ARRAY_COUNT(positionRead));
REPORTER_ASSERT(reporter, count == SK_ARRAY_COUNT(positionRead));
REPORTER_ASSERT(reporter, positionRead[0].axis == position[1].axis);
// Convert to fixed for "almost equal".
SkFixed fixedRead = SkScalarToFixed(positionRead[0].value);
SkFixed fixedOriginal = SkScalarToFixed(position[1].value);
REPORTER_ASSERT(reporter, SkTAbs(fixedRead - fixedOriginal) < 2);
}
DEF_TEST(TypefaceVariationIndex, reporter) {
std::unique_ptr<SkStreamAsset> distortable(GetResourceAsStream("fonts/Distortable.ttf"));
if (!distortable) {
REPORT_FAILURE(reporter, "distortable", SkString());
return;
}
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
SkFontArguments params;
// The first named variation position in Distortable is 'Thin'.
params.setCollectionIndex(0x00010000);
sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(distortable), params);
if (!typeface) {
// FreeType is the only weird thing that supports this, Skia just needs to make sure if it
// gets one of these things make sense.
return;
}
int count = typeface->getVariationDesignPosition(nullptr, 0);
if (!(count == 1)) {
REPORT_FAILURE(reporter, "count == 1", SkString());
return;
}
SkFontArguments::VariationPosition::Coordinate positionRead[1];
count = typeface->getVariationDesignPosition(positionRead, SK_ARRAY_COUNT(positionRead));
if (count == -1) {
return;
}
if (!(count == 1)) {
REPORT_FAILURE(reporter, "count == 1", SkString());
return;
}
REPORTER_ASSERT(reporter, positionRead[0].axis == SkSetFourByteTag('w','g','h','t'));
REPORTER_ASSERT(reporter, positionRead[0].value == 0.5);
}
DEF_TEST(Typeface, reporter) {
sk_sp<SkTypeface> t1(SkTypeface::MakeFromName(nullptr, SkFontStyle()));
sk_sp<SkTypeface> t2(SkTypeface::MakeDefault());
REPORTER_ASSERT(reporter, SkTypeface::Equal(t1.get(), t2.get()));
REPORTER_ASSERT(reporter, SkTypeface::Equal(nullptr, t1.get()));
REPORTER_ASSERT(reporter, SkTypeface::Equal(nullptr, t2.get()));
REPORTER_ASSERT(reporter, SkTypeface::Equal(t1.get(), nullptr));
REPORTER_ASSERT(reporter, SkTypeface::Equal(t2.get(), nullptr));
}
DEF_TEST(TypefaceAxesParameters, reporter) {
std::unique_ptr<SkStreamAsset> distortable(GetResourceAsStream("fonts/Distortable.ttf"));
if (!distortable) {
REPORT_FAILURE(reporter, "distortable", SkString());
return;
}
constexpr int numberOfAxesInDistortable = 1;
constexpr SkScalar minAxisInDistortable = 0.5;
constexpr SkScalar defAxisInDistortable = 1;
constexpr SkScalar maxAxisInDistortable = 2;
constexpr bool axisIsHiddenInDistortable = false;
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
SkFontArguments params;
sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(distortable), params);
if (!typeface) {
// Not all SkFontMgr can makeFromStream().
return;
}
SkFontParameters::Variation::Axis parameter[numberOfAxesInDistortable];
int count = typeface->getVariationDesignParameters(parameter, SK_ARRAY_COUNT(parameter));
if (count == -1) {
return;
}
REPORTER_ASSERT(reporter, count == SK_ARRAY_COUNT(parameter));
REPORTER_ASSERT(reporter, parameter[0].min == minAxisInDistortable);
REPORTER_ASSERT(reporter, parameter[0].def == defAxisInDistortable);
REPORTER_ASSERT(reporter, parameter[0].max == maxAxisInDistortable);
REPORTER_ASSERT(reporter, parameter[0].tag == SkSetFourByteTag('w','g','h','t'));
REPORTER_ASSERT(reporter, parameter[0].isHidden() == axisIsHiddenInDistortable);
}
static bool count_proc(SkTypeface* face, void* ctx) {
int* count = static_cast<int*>(ctx);
*count = *count + 1;
return false;
}
static int count(skiatest::Reporter* reporter, const SkTypefaceCache& cache) {
int count = 0;
sk_sp<SkTypeface> none = cache.findByProcAndRef(count_proc, &count);
REPORTER_ASSERT(reporter, none == nullptr);
return count;
}
DEF_TEST(TypefaceCache, reporter) {
sk_sp<SkTypeface> t1(TestEmptyTypeface::Make());
{
SkTypefaceCache cache;
REPORTER_ASSERT(reporter, count(reporter, cache) == 0);
{
sk_sp<SkTypeface> t0(TestEmptyTypeface::Make());
cache.add(t0);
REPORTER_ASSERT(reporter, count(reporter, cache) == 1);
cache.add(t1);
REPORTER_ASSERT(reporter, count(reporter, cache) == 2);
cache.purgeAll();
REPORTER_ASSERT(reporter, count(reporter, cache) == 2);
}
REPORTER_ASSERT(reporter, count(reporter, cache) == 2);
cache.purgeAll();
REPORTER_ASSERT(reporter, count(reporter, cache) == 1);
}
REPORTER_ASSERT(reporter, t1->unique());
}
static void check_serialize_behaviors(sk_sp<SkTypeface> tf, bool isLocalData,
skiatest::Reporter* reporter) {
if (!tf) {
return;
}
auto data0 = tf->serialize(SkTypeface::SerializeBehavior::kDoIncludeData);
auto data1 = tf->serialize(SkTypeface::SerializeBehavior::kDontIncludeData);
auto data2 = tf->serialize(SkTypeface::SerializeBehavior::kIncludeDataIfLocal);
REPORTER_ASSERT(reporter, data0->size() >= data1->size());
if (isLocalData) {
REPORTER_ASSERT(reporter, data0->equals(data2.get()));
} else {
REPORTER_ASSERT(reporter, data1->equals(data2.get()));
}
}
DEF_TEST(Typeface_serialize, reporter) {
check_serialize_behaviors(SkTypeface::MakeDefault(), false, reporter);
check_serialize_behaviors(SkTypeface::MakeFromStream(
GetResourceAsStream("fonts/Distortable.ttf")),
true, reporter);
}
DEF_TEST(Typeface_glyph_to_char, reporter) {
SkFont font(ToolUtils::emoji_typeface(), 12);
SkASSERT(font.getTypeface());
char const * text = ToolUtils::emoji_sample_text();
size_t const textLen = strlen(text);
size_t const codepointCount = SkUTF::CountUTF8(text, textLen);
char const * const textEnd = text + textLen;
std::unique_ptr<SkUnichar[]> originalCodepoints(new SkUnichar[codepointCount]);
for (size_t i = 0; i < codepointCount; ++i) {
originalCodepoints[i] = SkUTF::NextUTF8(&text, textEnd);
}
std::unique_ptr<SkGlyphID[]> glyphs(new SkGlyphID[codepointCount]);
font.unicharsToGlyphs(originalCodepoints.get(), codepointCount, glyphs.get());
std::unique_ptr<SkUnichar[]> newCodepoints(new SkUnichar[codepointCount]);
SkFontPriv::GlyphsToUnichars(font, glyphs.get(), codepointCount, newCodepoints.get());
SkString familyName;
font.getTypeface()->getFamilyName(&familyName);
for (size_t i = 0; i < codepointCount; ++i) {
#if defined(SK_BUILD_FOR_WIN)
// GDI does not support character to glyph mapping outside BMP.
if (gSkFontMgr_DefaultFactory == &SkFontMgr_New_GDI &&
0xFFFF < originalCodepoints[i] && newCodepoints[i] == 0)
{
continue;
}
#endif
// If two codepoints map to the same glyph then this assert is not valid.
// However, the emoji test font should never have multiple characters map to the same glyph.
REPORTER_ASSERT(reporter, originalCodepoints[i] == newCodepoints[i],
"name:%s i:%d original:%d new:%d glyph:%d", familyName.c_str(), i,
originalCodepoints[i], newCodepoints[i], glyphs[i]);
}
}
// This test makes sure the legacy typeface creation does not lose its specified
// style. See https://bugs.chromium.org/p/skia/issues/detail?id=8447 for more
// context.
DEF_TEST(LegacyMakeTypeface, reporter) {
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
sk_sp<SkTypeface> typeface1 = fm->legacyMakeTypeface(nullptr, SkFontStyle::Italic());
sk_sp<SkTypeface> typeface2 = fm->legacyMakeTypeface(nullptr, SkFontStyle::Bold());
sk_sp<SkTypeface> typeface3 = fm->legacyMakeTypeface(nullptr, SkFontStyle::BoldItalic());
REPORTER_ASSERT(reporter, typeface1->isItalic());
REPORTER_ASSERT(reporter, !typeface1->isBold());
REPORTER_ASSERT(reporter, !typeface2->isItalic());
REPORTER_ASSERT(reporter, typeface2->isBold());
REPORTER_ASSERT(reporter, typeface3->isItalic());
REPORTER_ASSERT(reporter, typeface3->isBold());
}
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