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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/MappedFile.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <LibGfx/Font.h>
#include <LibGfx/Size.h>
namespace Gfx {
// Note: Perhaps put glyph count directly in header
// and sidestep FontType conflation/sync maintenance
enum FontTypes {
Default = 0,
LatinExtendedA,
Cyrillic,
Hebrew,
__Count
};
class BitmapFont final : public Font {
public:
NonnullRefPtr<Font> clone() const override;
static NonnullRefPtr<BitmapFont> create(u8 glyph_height, u8 glyph_width, bool fixed, FontTypes type);
static RefPtr<BitmapFont> load_from_file(String const& path);
bool write_to_file(String const& path);
~BitmapFont();
u8 presentation_size() const override { return m_presentation_size; }
void set_presentation_size(u8 size) { m_presentation_size = size; }
u16 weight() const override { return m_weight; }
void set_weight(u16 weight) { m_weight = weight; }
Glyph glyph(u32 code_point) const override;
bool contains_glyph(u32 code_point) const override { return code_point < (u32)glyph_count() && m_glyph_widths[code_point] > 0; }
u8 glyph_width(size_t ch) const override { return m_fixed_width ? m_glyph_width : m_glyph_widths[ch]; }
ALWAYS_INLINE int glyph_or_emoji_width(u32 code_point) const override
{
if (m_fixed_width)
return m_glyph_width;
return glyph_or_emoji_width_for_variable_width_font(code_point);
}
u8 glyph_height() const override { return m_glyph_height; }
int x_height() const override { return m_x_height; }
u8 raw_glyph_width(size_t ch) const { return m_glyph_widths[ch]; }
u8 min_glyph_width() const override { return m_min_glyph_width; }
u8 max_glyph_width() const override { return m_max_glyph_width; }
u8 glyph_fixed_width() const override { return m_glyph_width; }
u8 baseline() const override { return m_baseline; }
void set_baseline(u8 baseline)
{
m_baseline = baseline;
update_x_height();
}
u8 mean_line() const override { return m_mean_line; }
void set_mean_line(u8 mean_line)
{
m_mean_line = mean_line;
update_x_height();
}
int width(StringView const&) const override;
int width(Utf8View const&) const override;
int width(Utf32View const&) const override;
String name() const override { return m_name; }
void set_name(String name) { m_name = move(name); }
bool is_fixed_width() const override { return m_fixed_width; }
void set_fixed_width(bool b) { m_fixed_width = b; }
u8 glyph_spacing() const override { return m_glyph_spacing; }
void set_glyph_spacing(u8 spacing) { m_glyph_spacing = spacing; }
void set_glyph_width(size_t ch, u8 width)
{
VERIFY(m_glyph_widths);
m_glyph_widths[ch] = width;
}
size_t glyph_count() const override { return m_glyph_count; }
FontTypes type() { return m_type; }
void set_type(FontTypes type);
String family() const override { return m_family; }
void set_family(String family) { m_family = move(family); }
String variant() const override { return String::number(weight()); }
String qualified_name() const override;
static size_t glyph_count_by_type(FontTypes type);
static String type_name_by_type(FontTypes type);
private:
BitmapFont(String name, String family, unsigned* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing, FontTypes type, u8 baseline, u8 mean_line, u8 presentation_size, u16 weight, bool owns_arrays = false);
static RefPtr<BitmapFont> load_from_memory(u8 const*);
template<typename T>
int unicode_view_width(T const& view) const;
void update_x_height() { m_x_height = m_baseline - m_mean_line; };
int glyph_or_emoji_width_for_variable_width_font(u32 code_point) const;
String m_name;
String m_family;
FontTypes m_type;
size_t m_glyph_count { 256 };
unsigned* m_rows { nullptr };
u8* m_glyph_widths { nullptr };
RefPtr<MappedFile> m_mapped_file;
u8 m_glyph_width { 0 };
u8 m_glyph_height { 0 };
u8 m_x_height { 0 };
u8 m_min_glyph_width { 0 };
u8 m_max_glyph_width { 0 };
u8 m_glyph_spacing { 0 };
u8 m_baseline { 0 };
u8 m_mean_line { 0 };
u8 m_presentation_size { 0 };
u16 m_weight { 0 };
bool m_fixed_width { false };
bool m_owns_arrays { false };
};
}
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