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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 HOLDER 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.
*/
#pragma once
#include <AK/MappedFile.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <LibGfx/Size.h>
namespace Gfx {
// FIXME: Make a MutableGlyphBitmap buddy class for FontEditor instead?
class GlyphBitmap {
friend class Font;
public:
const unsigned* rows() const { return m_rows; }
unsigned row(unsigned index) const { return m_rows[index]; }
bool bit_at(int x, int y) const { return row(y) & (1 << x); }
void set_bit_at(int x, int y, bool b)
{
auto& mutable_row = const_cast<unsigned*>(m_rows)[y];
if (b)
mutable_row |= 1 << x;
else
mutable_row &= ~(1 << x);
}
Size size() const { return m_size; }
int width() const { return m_size.width(); }
int height() const { return m_size.height(); }
private:
GlyphBitmap(const unsigned* rows, Size size)
: m_rows(rows)
, m_size(size)
{
}
const unsigned* m_rows { nullptr };
Size m_size;
};
class Font : public RefCounted<Font> {
public:
static Font& default_font();
static Font& default_bold_font();
static Font& default_fixed_width_font();
static Font& default_bold_fixed_width_font();
NonnullRefPtr<Font> clone() const;
static NonnullRefPtr<Font> create(u8 glyph_height, u8 glyph_width, bool fixed);
static RefPtr<Font> load_from_file(const StringView& path);
bool write_to_file(const StringView& path);
~Font();
GlyphBitmap glyph_bitmap(char ch) const { return GlyphBitmap(&m_rows[(u8)ch * m_glyph_height], { glyph_width(ch), m_glyph_height }); }
u8 glyph_width(char ch) const { return m_fixed_width ? m_glyph_width : m_glyph_widths[(u8)ch]; }
int glyph_or_emoji_width(u32 codepoint) const;
u8 glyph_height() const { return m_glyph_height; }
u8 min_glyph_width() const { return m_min_glyph_width; }
u8 max_glyph_width() const { return m_max_glyph_width; }
int width(const StringView&) const;
int width(const Utf8View&) const;
String name() const { return m_name; }
void set_name(const StringView& name) { m_name = name; }
bool is_fixed_width() const { return m_fixed_width; }
void set_fixed_width(bool b) { m_fixed_width = b; }
u8 glyph_spacing() const { return m_glyph_spacing; }
void set_glyph_spacing(u8 spacing) { m_glyph_spacing = spacing; }
void set_glyph_width(char ch, u8 width)
{
ASSERT(m_glyph_widths);
m_glyph_widths[(u8)ch] = width;
}
private:
Font(const StringView& name, unsigned* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing);
static RefPtr<Font> load_from_memory(const u8*);
String m_name;
unsigned* m_rows { nullptr };
u8* m_glyph_widths { nullptr };
MappedFile m_mapped_file;
u8 m_glyph_width { 0 };
u8 m_glyph_height { 0 };
u8 m_min_glyph_width { 0 };
u8 m_max_glyph_width { 0 };
u8 m_glyph_spacing { 0 };
bool m_fixed_width { false };
};
}
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