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/*
* Copyright (c) 2006, 2007, 2008, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_PLATFORM_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_PLATFORM_DATA_H_
#include "base/memory/scoped_refptr.h"
#include "build/build_config.h"
#include "third_party/blink/public/common/privacy_budget/identifiable_token.h"
#include "third_party/blink/public/platform/web_font_render_style.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/font_orientation.h"
#include "third_party/blink/renderer/platform/fonts/resolved_font_features.h"
#include "third_party/blink/renderer/platform/fonts/small_caps_iterator.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/hash_table_deleted_value_type.h"
#include "third_party/blink/renderer/platform/wtf/text/string_impl.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "third_party/skia/include/core/SkFont.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkTypeface.h"
#if BUILDFLAG(IS_MAC)
typedef const struct __CTFont* CTFontRef;
#endif // BUILDFLAG(IS_MAC)
namespace blink {
class HarfBuzzFace;
class PLATFORM_EXPORT FontPlatformData
: public GarbageCollected<FontPlatformData> {
public:
// Used for deleted values in the font cache's hash tables. The hash table
// will create us with this structure, and it will compare other values
// to this "Deleted" one. It expects the Deleted one to be differentiable
// from the 0 one (created with the empty constructor), so we can't just
// set everything to 0.
FontPlatformData(WTF::HashTableDeletedValueType);
FontPlatformData();
FontPlatformData(const FontPlatformData&);
FontPlatformData(const FontPlatformData& src, float text_size);
FontPlatformData(const sk_sp<SkTypeface>,
const std::string& name,
float text_size,
bool synthetic_bold,
bool synthetic_italic,
TextRenderingMode text_rendering,
ResolvedFontFeatures resolved_font_features,
FontOrientation = FontOrientation::kHorizontal);
~FontPlatformData();
void Trace(Visitor*) const;
#if BUILDFLAG(IS_MAC)
// Returns nullptr for FreeType backed SkTypefaces, compare
// FontCustomPlatformData, which are used for variable fonts on Mac OS
// <10.12. It should not return nullptr otherwise. So it allows distinguishing
// which backend the SkTypeface is using.
CTFontRef CtFont() const;
#endif
String FontFamilyName() const;
bool IsAhem() const;
float size() const { return text_size_; }
bool SyntheticBold() const { return synthetic_bold_; }
bool SyntheticItalic() const { return synthetic_italic_; }
SkTypeface* Typeface() const;
sk_sp<SkTypeface> TypefaceSp() const { return typeface_; }
HarfBuzzFace* GetHarfBuzzFace() const;
bool HasSpaceInLigaturesOrKerning(TypesettingFeatures) const;
SkTypefaceID UniqueID() const;
unsigned GetHash() const;
FontOrientation Orientation() const { return orientation_; }
const ResolvedFontFeatures& ResolvedFeatures() const {
return resolved_font_features_;
}
bool IsVerticalAnyUpright() const {
return blink::IsVerticalAnyUpright(orientation_);
}
bool IsVerticalNonCJKUpright() const {
return blink::IsVerticalNonCJKUpright(orientation_);
}
void SetOrientation(FontOrientation orientation) {
orientation_ = orientation;
}
void SetSyntheticBold(bool synthetic_bold) {
synthetic_bold_ = synthetic_bold;
}
void SetSyntheticItalic(bool synthetic_italic) {
synthetic_italic_ = synthetic_italic;
}
void SetAvoidEmbeddedBitmaps(bool embedded_bitmaps) {
avoid_embedded_bitmaps_ = embedded_bitmaps;
}
bool operator==(const FontPlatformData&) const;
bool operator!=(const FontPlatformData& a) const { return !operator==(a); }
FontPlatformData& operator=(const FontPlatformData&) = delete;
bool IsHashTableDeletedValue() const { return is_hash_table_deleted_value_; }
#if !BUILDFLAG(IS_MAC)
bool FontContainsCharacter(UChar32 character) const;
#endif
#if !BUILDFLAG(IS_WIN) && !BUILDFLAG(IS_MAC)
const WebFontRenderStyle& GetFontRenderStyle() const { return style_; }
#endif
SkFont CreateSkFont(const FontDescription* = nullptr) const;
// Computes a digest from the typeface. The digest only depends on the
// underlying font itself, and does not vary by the style (size, weight,
// italics, etc). This is aimed at discovering the fingerprinting information
// a particular local font may provide websites.
//
// The digest algorithm is designed for fast computation, rather than to be
// robust against an attacker with control of local fonts looking to attack
// the fingerprinting algorithm.
IdentifiableToken ComputeTypefaceDigest() const;
// Gets the postscript name from the typeface.
String GetPostScriptName() const;
private:
#if !BUILDFLAG(IS_WIN) && !BUILDFLAG(IS_MAC)
WebFontRenderStyle QuerySystemRenderStyle(const std::string& family,
float text_size,
SkFontStyle,
TextRenderingMode text_rendering);
#endif
#if BUILDFLAG(IS_WIN)
// TODO(https://crbug.com/808221): Remove and use QuerySystemRenderStyle()
// instead.
WebFontRenderStyle QuerySystemForRenderStyle();
#endif
const sk_sp<SkTypeface> typeface_;
#if !BUILDFLAG(IS_WIN) && !BUILDFLAG(IS_MAC)
std::string family_;
#endif
public:
float text_size_ = 0;
bool synthetic_bold_ = false;
bool synthetic_italic_ = false;
bool avoid_embedded_bitmaps_ = false;
TextRenderingMode text_rendering_ = TextRenderingMode::kAutoTextRendering;
FontOrientation orientation_ = FontOrientation::kHorizontal;
ResolvedFontFeatures resolved_font_features_;
private:
#if !BUILDFLAG(IS_MAC)
WebFontRenderStyle style_;
#endif
mutable Member<HarfBuzzFace> harfbuzz_face_;
bool is_hash_table_deleted_value_ = false;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_PLATFORM_DATA_H_
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