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/*
* This file is part of the internal font implementation.
*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
* Copyright (c) 2010 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#import "third_party/blink/renderer/platform/fonts/font_platform_data.h"
#import <AppKit/NSFont.h>
#import <AvailabilityMacros.h>
#import "third_party/blink/public/platform/mac/web_sandbox_support.h"
#import "third_party/blink/public/platform/platform.h"
#import "third_party/blink/renderer/platform/fonts/font.h"
#import "third_party/blink/renderer/platform/fonts/opentype/font_settings.h"
#import "third_party/blink/renderer/platform/fonts/shaping/harfbuzz_face.h"
#import "third_party/blink/renderer/platform/graphics/skia/skia_utils.h"
#import "third_party/blink/renderer/platform/layout_test_support.h"
#import "third_party/blink/renderer/platform/wtf/retain_ptr.h"
#import "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#import "third_party/skia/include/ports/SkTypeface_mac.h"
namespace blink {
static bool CanLoadInProcess(NSFont* ns_font) {
RetainPtr<CGFontRef> cg_font(kAdoptCF,
CTFontCopyGraphicsFont(toCTFontRef(ns_font), 0));
// Toll-free bridged types CFStringRef and NSString*.
RetainPtr<NSString> font_name(
kAdoptNS, const_cast<NSString*>(reinterpret_cast<const NSString*>(
CGFontCopyPostScriptName(cg_font.Get()))));
return ![font_name.Get() isEqualToString:@"LastResort"];
}
static CTFontDescriptorRef CascadeToLastResortFontDescriptor() {
static CTFontDescriptorRef descriptor;
if (descriptor)
return descriptor;
RetainPtr<CTFontDescriptorRef> last_resort(
kAdoptCF, CTFontDescriptorCreateWithNameAndSize(CFSTR("LastResort"), 0));
const void* descriptors[] = {last_resort.Get()};
RetainPtr<CFArrayRef> values_array(
kAdoptCF, CFArrayCreate(kCFAllocatorDefault, descriptors,
arraysize(descriptors), &kCFTypeArrayCallBacks));
const void* keys[] = {kCTFontCascadeListAttribute};
const void* values[] = {values_array.Get()};
RetainPtr<CFDictionaryRef> attributes(
kAdoptCF,
CFDictionaryCreate(kCFAllocatorDefault, keys, values, arraysize(keys),
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks));
descriptor = CTFontDescriptorCreateWithAttributes(attributes.Get());
return descriptor;
}
static sk_sp<SkTypeface> LoadFromBrowserProcess(NSFont* ns_font,
float text_size) {
// Send cross-process request to load font.
WebSandboxSupport* sandbox_support = Platform::Current()->GetSandboxSupport();
if (!sandbox_support) {
// This function should only be called in response to an error loading a
// font due to being blocked by the sandbox.
// This by definition shouldn't happen if there is no sandbox support.
NOTREACHED();
return nullptr;
}
CGFontRef loaded_cg_font;
uint32_t font_id;
if (!sandbox_support->LoadFont(toCTFontRef(ns_font), &loaded_cg_font,
&font_id)) {
// TODO crbug.com/461279: Make this appear in the inspector console?
DLOG(ERROR)
<< "Loading user font \"" << [[ns_font familyName] UTF8String]
<< "\" from non system location failed. Corrupt or missing font file?";
return nullptr;
}
RetainPtr<CGFontRef> cg_font(kAdoptCF, loaded_cg_font);
RetainPtr<CTFontRef> ct_font(
kAdoptCF,
CTFontCreateWithGraphicsFont(cg_font.Get(), text_size, 0,
CascadeToLastResortFontDescriptor()));
sk_sp<SkTypeface> return_font(
SkCreateTypefaceFromCTFont(ct_font.Get(), cg_font.Get()));
if (!return_font.get())
// TODO crbug.com/461279: Make this appear in the inspector console?
DLOG(ERROR)
<< "Instantiating SkTypeface from user font failed for font family \""
<< [[ns_font familyName] UTF8String] << "\".";
return return_font;
}
void FontPlatformData::SetupPaintFont(PaintFont* paint_font,
float,
const Font* font) const {
bool should_smooth_fonts = true;
bool should_antialias = true;
bool should_subpixel_position = true;
if (font) {
switch (font->GetFontDescription().FontSmoothing()) {
case kAntialiased:
should_smooth_fonts = false;
break;
case kSubpixelAntialiased:
break;
case kNoSmoothing:
should_antialias = false;
should_smooth_fonts = false;
break;
case kAutoSmoothing:
// For the AutoSmooth case, don't do anything! Keep the default
// settings.
break;
}
}
if (LayoutTestSupport::IsRunningLayoutTest()) {
should_smooth_fonts = false;
should_antialias = should_antialias &&
LayoutTestSupport::IsFontAntialiasingEnabledForTest();
should_subpixel_position =
LayoutTestSupport::IsTextSubpixelPositioningAllowedForTest();
}
paint_font->SetAntiAlias(should_antialias);
paint_font->SetEmbeddedBitmapText(false);
const float ts = text_size_ >= 0 ? text_size_ : 12;
paint_font->SetTextSize(SkFloatToScalar(ts));
paint_font->SetTypeface(paint_typeface_);
paint_font->SetFakeBoldText(synthetic_bold_);
paint_font->SetTextSkewX(synthetic_italic_ ? -SK_Scalar1 / 4 : 0);
paint_font->SetLcdRenderText(should_smooth_fonts);
paint_font->SetSubpixelText(should_subpixel_position);
// When rendering using CoreGraphics, disable hinting when
// webkit-font-smoothing:antialiased or text-rendering:geometricPrecision is
// used. See crbug.com/152304
if (font &&
(font->GetFontDescription().FontSmoothing() == kAntialiased ||
font->GetFontDescription().TextRendering() == kGeometricPrecision))
paint_font->SetHinting(SkPaint::kNo_Hinting);
}
FontPlatformData::FontPlatformData(NSFont* ns_font,
float size,
bool synthetic_bold,
bool synthetic_italic,
FontOrientation orientation,
FontVariationSettings* variation_settings)
: text_size_(size),
synthetic_bold_(synthetic_bold),
synthetic_italic_(synthetic_italic),
orientation_(orientation),
is_hash_table_deleted_value_(false) {
DCHECK(ns_font);
sk_sp<SkTypeface> typeface;
if (CanLoadInProcess(ns_font)) {
typeface.reset(SkCreateTypefaceFromCTFont(toCTFontRef(ns_font)));
} else {
// In process loading fails for cases where third party font manager
// software registers fonts in non system locations such as /Library/Fonts
// and ~/Library Fonts, see crbug.com/72727 or crbug.com/108645.
typeface = LoadFromBrowserProcess(ns_font, size);
}
if (variation_settings && variation_settings->size() < UINT16_MAX) {
SkFontArguments::Axis axes[variation_settings->size()];
for (size_t i = 0; i < variation_settings->size(); ++i) {
AtomicString feature_tag = variation_settings->at(i).Tag();
axes[i] = {AtomicStringToFourByteTag(feature_tag),
SkFloatToScalar(variation_settings->at(i).Value())};
}
sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
// TODO crbug.com/670246: Refactor this to a future Skia API that acccepts
// axis parameters on system fonts directly.
typeface = fm->makeFromStream(
typeface->openStream(nullptr)->duplicate(),
SkFontArguments().setAxes(axes, variation_settings->size()));
}
// TODO(vmpstr): Save the creation parameters in PaintTypeface instead.
paint_typeface_ = PaintTypeface::FromSkTypeface(typeface);
}
} // namespace blink
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