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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <sal/config.h>
#include <i18nlangtag/languagetag.hxx>
#include <rtl/ref.hxx>
#include <salhelper/simplereferenceobject.hxx>
#include <tools/color.hxx>
#include <vcl/dllapi.h>
#include <vcl/fontcapabilities.hxx>
#include <vcl/fontcharmap.hxx>
#include <fontattributes.hxx>
#include <fontsubset.hxx>
#include <hb.h>
#include <hb-ot.h>
class LogicalFontInstance;
struct FontMatchStatus;
namespace vcl::font
{
class FontSelectPattern;
}
namespace vcl
{
class PhysicalFontFamily;
}
namespace vcl::font
{
class FontSelectPattern;
struct FontMatchStatus
{
public:
int mnFaceMatch;
const OUString* mpTargetStyleName;
};
struct RawFontData
{
public:
RawFontData(hb_blob_t* pBlob = nullptr)
: mpBlob(pBlob ? pBlob : hb_blob_get_empty())
{
}
RawFontData(const RawFontData& rOther)
: mpBlob(hb_blob_reference(rOther.mpBlob))
{
}
~RawFontData() { hb_blob_destroy(mpBlob); }
RawFontData& operator=(const RawFontData& rOther)
{
hb_blob_destroy(mpBlob);
mpBlob = hb_blob_reference(rOther.mpBlob);
return *this;
}
size_t size() const { return hb_blob_get_length(mpBlob); }
bool empty() const { return size() == 0; }
const uint8_t* data() const
{
return reinterpret_cast<const uint8_t*>(hb_blob_get_data(mpBlob, nullptr));
}
private:
hb_blob_t* mpBlob;
};
struct ColorLayer
{
sal_GlyphId nGlyphIndex;
uint32_t nColorIndex;
};
typedef std::vector<Color> ColorPalette;
// https://learn.microsoft.com/en-us/typography/opentype/spec/name#name-ids
typedef enum : hb_ot_name_id_t {
NAME_ID_COPYRIGHT = 0,
NAME_ID_FONT_FAMILY = 1,
NAME_ID_FONT_SUBFAMILY = 2,
NAME_ID_UNIQUE_ID = 3,
NAME_ID_FULL_NAME = 4,
NAME_ID_VERSION_STRING = 5,
NAME_ID_POSTSCRIPT_NAME = 6,
NAME_ID_TRADEMARK = 7,
NAME_ID_MANUFACTURER = 8,
NAME_ID_DESIGNER = 9,
NAME_ID_DESCRIPTION = 10,
NAME_ID_VENDOR_URL = 11,
NAME_ID_DESIGNER_URL = 12,
NAME_ID_LICENSE = 13,
NAME_ID_LICENSE_URL = 14,
//NAME_ID_RESERVED = 15,
NAME_ID_TYPOGRAPHIC_FAMILY = 16,
NAME_ID_TYPOGRAPHIC_SUBFAMILY = 17,
NAME_ID_MAC_FULL_NAME = 18,
NAME_ID_SAMPLE_TEXT = 19,
NAME_ID_CID_FINDFONT_NAME = 20,
NAME_ID_WWS_FAMILY = 21,
NAME_ID_WWS_SUBFAMILY = 22,
NAME_ID_LIGHT_BACKGROUND = 23,
NAME_ID_DARK_BACKGROUND = 24,
NAME_ID_VARIATIONS_PS_PREFIX = 25,
} NameID;
// TODO: no more direct access to members
// TODO: get rid of height/width for scalable fonts
// TODO: make cloning cheaper
/**
* abstract base class for physical font faces
*
* It acts as a factory for its corresponding LogicalFontInstances and
* can be extended to cache device and font instance specific data.
*/
class VCL_PLUGIN_PUBLIC PhysicalFontFace : public FontAttributes,
public salhelper::SimpleReferenceObject
{
public:
~PhysicalFontFace();
virtual rtl::Reference<LogicalFontInstance>
CreateFontInstance(const vcl::font::FontSelectPattern&) const = 0;
virtual sal_IntPtr GetFontId() const = 0;
virtual FontCharMapRef GetFontCharMap() const;
virtual bool GetFontCapabilities(vcl::FontCapabilities&) const;
RawFontData GetRawFontData(uint32_t) const;
bool IsBetterMatch(const vcl::font::FontSelectPattern&, FontMatchStatus&) const;
sal_Int32 CompareIgnoreSize(const PhysicalFontFace&) const;
// CreateFontSubset: a method to get a subset of glyphs of a font inside a
// new valid font file
// returns true if creation of subset was successful
// parameters: rOutBuffer: vector to write the subset to
// pGlyphIDs: the glyph ids to be extracted
// pEncoding: the character code corresponding to each glyph
// nGlyphs: the number of glyphs
// rInfo: additional outgoing information
// implementation note: encoding 0 with glyph id 0 should be added implicitly
// as "undefined character"
bool CreateFontSubset(std::vector<sal_uInt8>&, const sal_GlyphId*, const sal_uInt8*, const int,
FontSubsetInfo&) const;
bool IsColorFont() const { return HasColorLayers() || HasColorBitmaps(); }
bool HasColorLayers() const;
std::vector<ColorLayer> GetGlyphColorLayers(sal_GlyphId) const;
const std::vector<ColorPalette>& GetColorPalettes() const;
bool HasColorBitmaps() const;
RawFontData GetGlyphColorBitmap(sal_GlyphId, tools::Rectangle&) const;
OString GetGlyphName(sal_GlyphId, bool = false) const;
uint32_t UnitsPerEm() const { return hb_face_get_upem(GetHbFace()); }
OUString GetName(NameID, const LanguageTag&) const;
OUString GetName(NameID aNameID) const { return GetName(aNameID, LanguageTag(LANGUAGE_NONE)); }
virtual hb_face_t* GetHbFace() const;
virtual hb_blob_t* GetHbTable(hb_tag_t) const
{
assert(false);
return nullptr;
}
virtual const std::vector<hb_variation_t>& GetVariations(const LogicalFontInstance&) const;
protected:
mutable hb_face_t* mpHbFace;
mutable hb_font_t* mpHbUnscaledFont;
mutable FontCharMapRef mxCharMap;
mutable std::optional<vcl::FontCapabilities> mxFontCapabilities;
mutable std::optional<std::vector<ColorPalette>> mxColorPalettes;
mutable std::optional<std::vector<hb_variation_t>> mxVariations;
explicit PhysicalFontFace(const FontAttributes&);
hb_font_t* GetHbUnscaledFont() const;
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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