192 lines
6.7 KiB
C++
192 lines
6.7 KiB
C++
/*************************************************************************/
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/* dynamic_font_adv.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef DYNAMIC_FONT_ADV_H
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#define DYNAMIC_FONT_ADV_H
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#include "font_adv.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_TRUETYPE_TABLES_H
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#include <hb-ft.h>
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#include <hb-ot.h>
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struct DynamicFontDataAdvanced : public FontDataAdvanced {
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_THREAD_SAFE_CLASS_
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private:
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struct CharTexture {
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Vector<uint8_t> imgdata;
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int texture_size = 0;
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Vector<int> offsets;
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Ref<ImageTexture> texture;
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};
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struct Character {
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bool found = false;
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int texture_idx = 0;
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Rect2 rect;
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Rect2 rect_uv;
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Vector2 align;
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Vector2 advance = Vector2(-1, -1);
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static Character not_found();
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};
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struct TexturePosition {
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int index = 0;
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int x = 0;
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int y = 0;
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};
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struct CacheID {
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union {
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struct {
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uint32_t size : 16;
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uint32_t outline_size : 16;
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};
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uint32_t key;
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};
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bool operator<(CacheID right) const {
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return key < right.key;
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}
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CacheID() {
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key = 0;
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}
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};
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struct DataAtSize {
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FT_Face face = nullptr;
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TT_OS2 *os2 = nullptr;
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FT_StreamRec stream;
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int size = 0;
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float scale_color_font = 1.f;
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float ascent = 0;
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float descent = 0;
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float underline_position = 0;
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float underline_thickness = 0;
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Vector<CharTexture> textures;
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HashMap<uint32_t, Character> glyph_map;
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hb_font_t *hb_handle = nullptr;
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~DataAtSize() {
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if (hb_handle != nullptr) {
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hb_font_destroy(hb_handle);
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}
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if (face != nullptr) {
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FT_Done_Face(face);
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}
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}
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};
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FT_Library library = nullptr;
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// Source data.
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const uint8_t *font_mem = nullptr;
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int font_mem_size = 0;
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String font_path;
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Vector<uint8_t> font_mem_cache;
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Map<int32_t, double> variations;
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float rect_margin = 1.f;
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int base_size = 16;
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float oversampling = 1.f;
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bool antialiased = true;
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bool force_autohinter = false;
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TextServer::Hinting hinting = TextServer::HINTING_LIGHT;
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Map<CacheID, DataAtSize *> size_cache;
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Map<CacheID, DataAtSize *> size_cache_outline;
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DataAtSize *get_data_for_size(int p_size, int p_outline_size = 0);
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TexturePosition find_texture_pos_for_glyph(DataAtSize *p_data, int p_color_size, Image::Format p_image_format, int p_width, int p_height);
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Character bitmap_to_character(DataAtSize *p_data, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance);
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_FORCE_INLINE_ void update_glyph(int p_size, uint32_t p_index);
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_FORCE_INLINE_ void update_glyph_outline(int p_size, int p_outline_size, uint32_t p_index);
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public:
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virtual void clear_cache() override;
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virtual Error load_from_file(const String &p_filename, int p_base_size) override;
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virtual Error load_from_memory(const uint8_t *p_data, size_t p_size, int p_base_size) override;
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virtual float get_height(int p_size) const override;
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virtual float get_ascent(int p_size) const override;
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virtual float get_descent(int p_size) const override;
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virtual Dictionary get_feature_list() const override;
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virtual Dictionary get_variation_list() const override;
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virtual void set_variation(const String &p_name, double p_value) override;
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virtual double get_variation(const String &p_name) const override;
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virtual float get_underline_position(int p_size) const override;
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virtual float get_underline_thickness(int p_size) const override;
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virtual void set_antialiased(bool p_antialiased) override;
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virtual bool get_antialiased() const override;
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virtual void set_hinting(TextServer::Hinting p_hinting) override;
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virtual TextServer::Hinting get_hinting() const override;
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virtual void set_force_autohinter(bool p_enabled) override;
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virtual bool get_force_autohinter() const override;
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virtual void set_distance_field_hint(bool p_distance_field) override{};
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virtual bool get_distance_field_hint() const override { return false; };
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virtual bool has_outline() const override;
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virtual float get_base_size() const override;
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virtual bool is_script_supported(uint32_t p_script) const override;
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virtual bool has_char(char32_t p_char) const override;
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virtual String get_supported_chars() const override;
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virtual float get_font_scale(int p_size) const override;
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virtual hb_font_t *get_hb_handle(int p_size) override;
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virtual uint32_t get_glyph_index(char32_t p_char, char32_t p_variation_selector) const override;
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virtual Vector2 get_advance(uint32_t p_index, int p_size) const override;
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virtual Vector2 get_kerning(uint32_t p_char, uint32_t p_next, int p_size) const override;
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virtual Vector2 draw_glyph(RID p_canvas, int p_size, const Vector2 &p_pos, uint32_t p_index, const Color &p_color) const override;
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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;
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virtual ~DynamicFontDataAdvanced() override;
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};
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#endif // DYNAMIC_FONT_ADV_H
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