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skia2/tests/TypefaceTest.cpp
Ben Wagner ab51c2ce08 Add more variation support on Mac. 
With the recent transition to creating fonts from data as CTFonts and
dropping variation support from macOS 10.11 and earlier, it is now
possible to reliably make variation clones and get the axis information.

Change-Id: Ia9a0922ac94a29e1508d2e74d4ce973751044866
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259421
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-12-13 18:16:13 +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/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 = std::make_unique<SkMemoryStream>("a", 1, false);
desc.setFontData(std::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) {
return; // Not all SkFontMgr can makeFromStream().
}
int count = typeface->getVariationDesignPosition(nullptr, 0);
if (count == -1) {
return; // The number of axes is unknown.
}
REPORTER_ASSERT(reporter, count == numberOfAxesInDistortable);
SkFontArguments::VariationPosition::Coordinate positionRead[numberOfAxesInDistortable];
count = typeface->getVariationDesignPosition(positionRead, SK_ARRAY_COUNT(positionRead));
if (count == -1) {
return; // The position cannot be determined.
}
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 || // variation set correctly
SkTAbs(fixedRead - SK_Fixed1 ) < 2); // variation remained default
}
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 = true;
sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault();
SkFontArguments params;
sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(distortable), params);
if (!typeface) {
return; // Not all SkFontMgr can makeFromStream().
}
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'));
// This seems silly, but allows MSAN to ensure that isHidden is initialized.
// With GDI or before macOS 10.12, Win10, or FreeType 2.8.1 the API for hidden is missing.
REPORTER_ASSERT(reporter, parameter[0].isHidden() == axisIsHiddenInDistortable ||
parameter[0].isHidden() == false);
}
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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