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/*************************************************************************/
/* dynamic_font.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef DYNAMIC_FONT_H
#define DYNAMIC_FONT_H
#ifdef FREETYPE_ENABLED
#include "core/io/resource_loader.h"
#include "core/os/mutex.h"
#include "core/os/thread_safe.h"
#include "core/pair.h"
#include "scene/resources/font.h"
#include <ft2build.h>
#include FT_FREETYPE_H
class DynamicFontAtSize;
class DynamicFont;
class DynamicFontData : public Resource {
GDCLASS(DynamicFontData, Resource);
public:
struct CacheID {
union {
struct {
uint32_t size : 16;
uint32_t outline_size : 8;
uint32_t mipmaps : 1;
uint32_t filter : 1;
uint32_t unused : 6;
};
uint32_t key;
};
bool operator<(CacheID right) const;
CacheID() {
key = 0;
}
};
enum Hinting {
HINTING_NONE,
HINTING_LIGHT,
HINTING_NORMAL
};
bool is_antialiased() const;
void set_antialiased(bool p_antialiased);
Hinting get_hinting() const;
void set_hinting(Hinting p_hinting);
private:
const uint8_t *font_mem;
int font_mem_size;
bool antialiased;
bool force_autohinter;
Hinting hinting;
String font_path;
Map<CacheID, DynamicFontAtSize *> size_cache;
friend class DynamicFontAtSize;
friend class DynamicFont;
Ref<DynamicFontAtSize> _get_dynamic_font_at_size(CacheID p_cache_id);
protected:
static void _bind_methods();
public:
void set_font_ptr(const uint8_t *p_font_mem, int p_font_mem_size);
void set_font_path(const String &p_path);
String get_font_path() const;
void set_force_autohinter(bool p_force);
DynamicFontData();
~DynamicFontData();
};
VARIANT_ENUM_CAST(DynamicFontData::Hinting);
class DynamicFontAtSize : public Reference {
GDCLASS(DynamicFontAtSize, Reference);
_THREAD_SAFE_CLASS_
FT_Library library; /* handle to library */
FT_Face face; /* handle to face object */
FT_StreamRec stream;
float ascent;
float descent;
float linegap;
float rect_margin;
float oversampling;
float scale_color_font;
uint32_t texture_flags;
bool valid;
struct CharTexture {
PoolVector<uint8_t> imgdata;
int texture_size;
Vector<int> offsets;
Ref<ImageTexture> texture;
};
Vector<CharTexture> textures;
struct Character {
bool found;
int texture_idx;
Rect2 rect;
Rect2 rect_uv;
float v_align;
float h_align;
float advance;
Character() {
texture_idx = 0;
v_align = 0;
}
static Character not_found();
};
struct TexturePosition {
int index;
int x;
int y;
};
const Pair<const Character *, DynamicFontAtSize *> _find_char_with_font(CharType p_char, const Vector<Ref<DynamicFontAtSize> > &p_fallbacks) const;
Character _make_outline_char(CharType p_char);
TexturePosition _find_texture_pos_for_glyph(int p_color_size, Image::Format p_image_format, int p_width, int p_height);
Character _bitmap_to_character(FT_Bitmap bitmap, int yofs, int xofs, float advance);
static unsigned long _ft_stream_io(FT_Stream stream, unsigned long offset, unsigned char *buffer, unsigned long count);
static void _ft_stream_close(FT_Stream stream);
HashMap<CharType, Character> char_map;
_FORCE_INLINE_ void _update_char(CharType p_char);
friend class DynamicFontData;
Ref<DynamicFontData> font;
DynamicFontData::CacheID id;
static HashMap<String, Vector<uint8_t> > _fontdata;
Error _load();
public:
static float font_oversampling;
float get_height() const;
float get_ascent() const;
float get_descent() const;
Size2 get_char_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize> > &p_fallbacks) const;
float draw_char(RID p_canvas_item, const Point2 &p_pos, CharType p_char, CharType p_next, const Color &p_modulate, const Vector<Ref<DynamicFontAtSize> > &p_fallbacks, bool p_advance_only = false) const;
void set_texture_flags(uint32_t p_flags);
void update_oversampling();
DynamicFontAtSize();
~DynamicFontAtSize();
};
///////////////
class DynamicFont : public Font {
GDCLASS(DynamicFont, Font);
public:
enum SpacingType {
SPACING_TOP,
SPACING_BOTTOM,
SPACING_CHAR,
SPACING_SPACE
};
private:
Ref<DynamicFontData> data;
Ref<DynamicFontAtSize> data_at_size;
Ref<DynamicFontAtSize> outline_data_at_size;
Vector<Ref<DynamicFontData> > fallbacks;
Vector<Ref<DynamicFontAtSize> > fallback_data_at_size;
Vector<Ref<DynamicFontAtSize> > fallback_outline_data_at_size;
DynamicFontData::CacheID cache_id;
DynamicFontData::CacheID outline_cache_id;
bool valid;
int spacing_top;
int spacing_bottom;
int spacing_char;
int spacing_space;
Color outline_color;
protected:
void _reload_cache();
bool _set(const StringName &p_name, const Variant &p_value);
bool _get(const StringName &p_name, Variant &r_ret) const;
void _get_property_list(List<PropertyInfo> *p_list) const;
static void _bind_methods();
public:
void set_font_data(const Ref<DynamicFontData> &p_data);
Ref<DynamicFontData> get_font_data() const;
void set_size(int p_size);
int get_size() const;
void set_outline_size(int p_size);
int get_outline_size() const;
void set_outline_color(Color p_color);
Color get_outline_color() const;
bool get_use_mipmaps() const;
void set_use_mipmaps(bool p_enable);
bool get_use_filter() const;
void set_use_filter(bool p_enable);
int get_spacing(int p_type) const;
void set_spacing(int p_type, int p_value);
void add_fallback(const Ref<DynamicFontData> &p_data);
void set_fallback(int p_idx, const Ref<DynamicFontData> &p_data);
int get_fallback_count() const;
Ref<DynamicFontData> get_fallback(int p_idx) const;
void remove_fallback(int p_idx);
virtual float get_height() const;
virtual float get_ascent() const;
virtual float get_descent() const;
virtual Size2 get_char_size(CharType p_char, CharType p_next = 0) const;
virtual bool is_distance_field_hint() const;
virtual bool has_outline() const;
virtual float draw_char(RID p_canvas_item, const Point2 &p_pos, CharType p_char, CharType p_next = 0, const Color &p_modulate = Color(1, 1, 1), bool p_outline = false) const;
SelfList<DynamicFont> font_list;
static Mutex *dynamic_font_mutex;
static SelfList<DynamicFont>::List *dynamic_fonts;
static void initialize_dynamic_fonts();
static void finish_dynamic_fonts();
static void update_oversampling();
DynamicFont();
~DynamicFont();
};
VARIANT_ENUM_CAST(DynamicFont::SpacingType);
/////////////
class ResourceFormatLoaderDynamicFont : public ResourceFormatLoader {
public:
virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
virtual void get_recognized_extensions(List<String> *p_extensions) const;
virtual bool handles_type(const String &p_type) const;
virtual String get_resource_type(const String &p_path) const;
};
#endif
#endif
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