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/*************************************************************************/
/* dynamic_font_adv.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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_ADV_H
#define DYNAMIC_FONT_ADV_H
#include "font_adv.h"
#include "modules/modules_enabled.gen.h"
#ifdef MODULE_FREETYPE_ENABLED
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_TRUETYPE_TABLES_H
#include <hb-ft.h>
#include <hb-ot.h>
struct DynamicFontDataAdvanced : public FontDataAdvanced {
_THREAD_SAFE_CLASS_
private:
struct CharTexture {
Vector<uint8_t> imgdata;
int texture_size = 0;
Vector<int> offsets;
Ref<ImageTexture> texture;
};
struct Character {
bool found = false;
int texture_idx = 0;
Rect2 rect;
Rect2 rect_uv;
Vector2 align;
Vector2 advance = Vector2(-1, -1);
static Character not_found();
};
struct TexturePosition {
int index = 0;
int x = 0;
int y = 0;
};
struct CacheID {
union {
struct {
uint32_t size : 16;
uint32_t outline_size : 16;
};
uint32_t key = 0;
};
bool operator<(CacheID right) const {
return key < right.key;
}
};
struct DataAtSize {
FT_Face face = nullptr;
TT_OS2 *os2 = nullptr;
FT_StreamRec stream;
int size = 0;
float scale_color_font = 1.f;
float ascent = 0.0;
float descent = 0.0;
float underline_position = 0.0;
float underline_thickness = 0.0;
Vector<CharTexture> textures;
HashMap<uint32_t, Character> glyph_map;
hb_font_t *hb_handle = nullptr;
~DataAtSize() {
if (hb_handle != nullptr) {
hb_font_destroy(hb_handle);
}
if (face != nullptr) {
FT_Done_Face(face);
}
}
};
FT_Library library = nullptr;
// Source data.
const uint8_t *font_mem = nullptr;
int font_mem_size = 0;
String font_path;
Vector<uint8_t> font_mem_cache;
Map<int32_t, double> variations;
float rect_margin = 1.f;
int base_size = 16;
float oversampling = 1.f;
bool antialiased = true;
bool force_autohinter = false;
TextServer::Hinting hinting = TextServer::HINTING_LIGHT;
Map<CacheID, DataAtSize *> size_cache;
Map<CacheID, DataAtSize *> size_cache_outline;
DataAtSize *get_data_for_size(int p_size, int p_outline_size = 0);
TexturePosition find_texture_pos_for_glyph(DataAtSize *p_data, int p_color_size, Image::Format p_image_format, int p_width, int p_height);
Character bitmap_to_character(DataAtSize *p_data, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance);
_FORCE_INLINE_ void update_glyph(int p_size, uint32_t p_index);
_FORCE_INLINE_ void update_glyph_outline(int p_size, int p_outline_size, uint32_t p_index);
public:
virtual void clear_cache() override;
virtual Error load_from_file(const String &p_filename, int p_base_size) override;
virtual Error load_from_memory(const uint8_t *p_data, size_t p_size, int p_base_size) override;
virtual float get_height(int p_size) const override;
virtual float get_ascent(int p_size) const override;
virtual float get_descent(int p_size) const override;
virtual Dictionary get_feature_list() const override;
virtual Dictionary get_variation_list() const override;
virtual void set_variation(const String &p_name, double p_value) override;
virtual double get_variation(const String &p_name) const override;
virtual float get_underline_position(int p_size) const override;
virtual float get_underline_thickness(int p_size) const override;
virtual void set_antialiased(bool p_antialiased) override;
virtual bool get_antialiased() const override;
virtual void set_hinting(TextServer::Hinting p_hinting) override;
virtual TextServer::Hinting get_hinting() const override;
virtual void set_force_autohinter(bool p_enabled) override;
virtual bool get_force_autohinter() const override;
virtual void set_distance_field_hint(bool p_distance_field) override{};
virtual bool get_distance_field_hint() const override { return false; };
virtual bool has_outline() const override;
virtual float get_base_size() const override;
virtual bool is_script_supported(uint32_t p_script) const override;
virtual bool has_char(char32_t p_char) const override;
virtual String get_supported_chars() const override;
virtual float get_font_scale(int p_size) const override;
virtual hb_font_t *get_hb_handle(int p_size) override;
virtual uint32_t get_glyph_index(char32_t p_char, char32_t p_variation_selector) const override;
virtual Vector2 get_advance(uint32_t p_index, int p_size) const override;
virtual Vector2 get_kerning(uint32_t p_char, uint32_t p_next, int p_size) const override;
virtual Vector2 draw_glyph(RID p_canvas, int p_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const override;
virtual Vector2 draw_glyph_outline(RID p_canvas, int p_size, int p_outline_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const override;
virtual ~DynamicFontDataAdvanced() override;
};
#endif // MODULE_FREETYPE_ENABLED
#endif // DYNAMIC_FONT_ADV_H
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