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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/fonts/web_font_typeface_factory.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "third_party/blink/renderer/platform/fonts/font_cache.h"
#include "third_party/blink/renderer/platform/fonts/opentype/font_format_check.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/core/SkTypeface.h"
#if defined(OS_WIN)
#include "third_party/blink/public/common/dwrite_rasterizer_support/dwrite_rasterizer_support.h"
#include "third_party/blink/renderer/platform/fonts/win/dwrite_font_format_support.h"
#endif
#if defined(OS_WIN) || defined(OS_MAC)
#include "third_party/skia/include/ports/SkFontMgr_empty.h"
#endif
#if defined(OS_MAC)
#include "third_party/blink/renderer/platform/fonts/mac/core_text_font_format_support.h"
#endif
namespace blink {
bool WebFontTypefaceFactory::CreateTypeface(sk_sp<SkData> sk_data,
sk_sp<SkTypeface>& typeface) {
CHECK(!typeface);
FontFormatCheck format_check(sk_data);
std::unique_ptr<SkStreamAsset> stream(new SkMemoryStream(sk_data));
if (!format_check.IsVariableFont() && !format_check.IsColorFont()) {
typeface = DefaultFontManager()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(
InstantiationResult::kSuccessConventionalWebFont);
return true;
}
// Not UMA reporting general decoding errors as these are already recorded
// as kPackageFormatUnknown in FontResource.cpp.
return false;
}
// We don't expect variable CBDT/CBLC or Sbix variable fonts for now.
if (format_check.IsCbdtCblcColorFont()) {
typeface = FreeTypeFontManager()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(InstantiationResult::kSuccessCbdtCblcColorFont);
}
return typeface.get();
}
if (format_check.IsColrCpalColorFontV1()) {
if (RuntimeEnabledFeatures::COLRV1FontsEnabled()) {
typeface = FreeTypeFontManager()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(InstantiationResult::kSuccessColrV1Font);
}
return typeface.get();
} else {
// Always reject COLRv1 fonts when the feature is off.
return false;
}
}
if (format_check.IsSbixColorFont()) {
typeface = FontManagerForSbix()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(InstantiationResult::kSuccessSbixFont);
}
return typeface.get();
}
// CFF2 must always go through the FreeTypeFontManager, even on Mac OS, as it
// is not natively supported.
if (format_check.IsCff2OutlineFont()) {
typeface = FreeTypeFontManager()->makeFromStream(std::move(stream));
if (typeface)
ReportInstantiationResult(InstantiationResult::kSuccessCff2Font);
return typeface.get();
}
// Variable COLR/CPAL fonts must go through the Variations
// FontManager, which is FreeType on Windows.
if (format_check.IsVariableFont()) {
typeface = FontManagerForVariations()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(InstantiationResult::kSuccessVariableWebFont);
} else {
ReportInstantiationResult(
InstantiationResult::kErrorInstantiatingVariableFont);
}
return typeface.get();
}
if (format_check.IsColrCpalColorFontV0()) {
typeface = FontManagerForColrCpal()->makeFromStream(std::move(stream));
if (typeface) {
ReportInstantiationResult(InstantiationResult::kSuccessColrCpalFont);
}
return typeface.get();
}
return false;
}
sk_sp<SkFontMgr> WebFontTypefaceFactory::FontManagerForVariations() {
#if defined(OS_WIN)
if (DWriteVersionSupportsVariations())
return DefaultFontManager();
return FreeTypeFontManager();
#else
#if defined(OS_MAC)
if (!CoreTextVersionSupportsVariations())
return FreeTypeFontManager();
#endif
return DefaultFontManager();
#endif
}
sk_sp<SkFontMgr> WebFontTypefaceFactory::FontManagerForSbix() {
#if defined(OS_MAC)
return DefaultFontManager();
#endif
return FreeTypeFontManager();
}
sk_sp<SkFontMgr> WebFontTypefaceFactory::DefaultFontManager() {
#if defined(OS_WIN)
return FontCache::GetFontCache()->FontManager();
#else
return sk_sp<SkFontMgr>(SkFontMgr::RefDefault());
#endif
}
sk_sp<SkFontMgr> WebFontTypefaceFactory::FreeTypeFontManager() {
#if defined(OS_WIN) || defined(OS_MAC)
return sk_sp<SkFontMgr>(SkFontMgr_New_Custom_Empty());
#else
return DefaultFontManager();
#endif
}
sk_sp<SkFontMgr> WebFontTypefaceFactory::FontManagerForColrCpal() {
#if defined(OS_WIN)
if (!blink::DWriteRasterizerSupport::IsDWriteFactory2Available())
return FreeTypeFontManager();
#endif
#if defined(OS_MAC)
if (!CoreTextVersionSupportsColrCpal())
return FreeTypeFontManager();
#endif
return DefaultFontManager();
}
void WebFontTypefaceFactory::ReportInstantiationResult(
InstantiationResult result) {
UMA_HISTOGRAM_ENUMERATION("Blink.Fonts.VariableFontsRatio", result);
}
} // namespace blink
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