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Diffstat (limited to 'modules/text_server_adv/dynamic_font_adv.h')
| -rw-r--r-- | modules/text_server_adv/dynamic_font_adv.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/modules/text_server_adv/dynamic_font_adv.h b/modules/text_server_adv/dynamic_font_adv.h new file mode 100644 index 0000000000..61cff3cde9 --- /dev/null +++ b/modules/text_server_adv/dynamic_font_adv.h @@ -0,0 +1,188 @@ +/*************************************************************************/ +/* dynamic_font_adv.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_ADV_H +#define DYNAMIC_FONT_ADV_H + +#include "font_adv.h" + +#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; + }; + bool operator<(CacheID right) const { + return key < right.key; + } + CacheID() { + key = 0; + } + }; + + 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; + float descent = 0; + float underline_position = 0; + float underline_thickness = 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; + static HashMap<String, Vector<uint8_t>> font_mem_cache; + + 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; + + 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); + + 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 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 // DYNAMIC_FONT_ADV_H |