496 lines
23 KiB
C++
496 lines
23 KiB
C++
/*************************************************************************/
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/* text_server_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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 TEXT_SERVER_ADV_H
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#define TEXT_SERVER_ADV_H
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/*************************************************************************/
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/* ICU/HarfBuzz/Graphite backed Text Server implementation with BiDi, */
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/* shaping and advanced font features support. */
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/*************************************************************************/
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#include "servers/text_server.h"
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#include "core/templates/rid_owner.h"
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#include "core/templates/thread_work_pool.h"
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#include "scene/resources/texture.h"
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#include "script_iterator.h"
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#include <unicode/ubidi.h>
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#include <unicode/ubrk.h>
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#include <unicode/uchar.h>
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#include <unicode/uclean.h>
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#include <unicode/udata.h>
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#include <unicode/uiter.h>
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#include <unicode/uloc.h>
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#include <unicode/uscript.h>
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#include <unicode/ustring.h>
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#include <unicode/utypes.h>
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#include "modules/modules_enabled.gen.h"
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#ifdef MODULE_FREETYPE_ENABLED
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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 FT_STROKER_H
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#include FT_ADVANCES_H
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#include FT_MULTIPLE_MASTERS_H
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#include FT_BBOX_H
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#include <hb-ft.h>
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#include <hb-ot.h>
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#endif
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#include <hb-icu.h>
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#include <hb.h>
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class TextServerAdvanced : public TextServer {
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GDCLASS(TextServerAdvanced, TextServer);
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_THREAD_SAFE_CLASS_
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static String interface_name;
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static uint32_t interface_features;
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// ICU support data.
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uint8_t *icu_data = nullptr;
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// Font cache data.
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#ifdef MODULE_FREETYPE_ENABLED
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mutable FT_Library library = nullptr;
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#endif
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const int rect_range = 2;
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struct FontTexture {
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Image::Format format;
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PackedByteArray imgdata;
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int texture_w = 0;
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int texture_h = 0;
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PackedInt32Array offsets;
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Ref<ImageTexture> texture;
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};
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struct FontTexturePosition {
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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 FontGlyph {
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bool found = false;
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int texture_idx = -1;
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Rect2 rect;
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Rect2 uv_rect;
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Vector2 advance;
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};
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struct FontDataForSizeAdvanced {
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float ascent = 0.f;
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float descent = 0.f;
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float underline_position = 0.f;
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float underline_thickness = 0.f;
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float scale = 1.f;
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float oversampling = 1.f;
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int spacing_glyph = 0;
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int spacing_space = 0;
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Vector2i size;
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Vector<FontTexture> textures;
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HashMap<int32_t, FontGlyph> glyph_map;
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Map<Vector2i, Vector2> kerning_map;
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hb_font_t *hb_handle = nullptr;
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#ifdef MODULE_FREETYPE_ENABLED
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FT_Face face = nullptr;
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FT_StreamRec stream;
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#endif
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~FontDataForSizeAdvanced() {
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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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#ifdef MODULE_FREETYPE_ENABLED
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if (face != nullptr) {
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FT_Done_Face(face);
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}
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#endif
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}
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};
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struct FontDataAdvanced {
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Mutex mutex;
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bool antialiased = true;
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bool msdf = false;
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int msdf_range = 14;
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int msdf_source_size = 48;
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int fixed_size = 0;
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bool force_autohinter = false;
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TextServer::Hinting hinting = TextServer::HINTING_LIGHT;
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Dictionary variation_coordinates;
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float oversampling = 0.f;
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Map<Vector2i, FontDataForSizeAdvanced *> cache;
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bool face_init = false;
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Set<uint32_t> supported_scripts;
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Dictionary supported_features;
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Dictionary supported_varaitions;
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// Language/script support override.
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Map<String, bool> language_support_overrides;
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Map<String, bool> script_support_overrides;
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PackedByteArray data;
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const uint8_t *data_ptr;
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size_t data_size;
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mutable ThreadWorkPool work_pool;
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~FontDataAdvanced() {
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work_pool.finish();
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for (const Map<Vector2i, FontDataForSizeAdvanced *>::Element *E = cache.front(); E; E = E->next()) {
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memdelete(E->get());
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}
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cache.clear();
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}
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};
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_FORCE_INLINE_ FontTexturePosition find_texture_pos_for_glyph(FontDataForSizeAdvanced *p_data, int p_color_size, Image::Format p_image_format, int p_width, int p_height) const;
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#ifdef MODULE_MSDFGEN_ENABLED
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_FORCE_INLINE_ FontGlyph rasterize_msdf(FontDataAdvanced *p_font_data, FontDataForSizeAdvanced *p_data, int p_pixel_range, int p_rect_margin, FT_Outline *outline, const Vector2 &advance) const;
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#endif
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#ifdef MODULE_FREETYPE_ENABLED
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_FORCE_INLINE_ FontGlyph rasterize_bitmap(FontDataForSizeAdvanced *p_data, int p_rect_margin, FT_Bitmap bitmap, int yofs, int xofs, const Vector2 &advance) const;
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#endif
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_FORCE_INLINE_ bool _ensure_glyph(FontDataAdvanced *p_font_data, const Vector2i &p_size, int32_t p_glyph) const;
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_FORCE_INLINE_ bool _ensure_cache_for_size(FontDataAdvanced *p_font_data, const Vector2i &p_size) const;
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_FORCE_INLINE_ void _font_clear_cache(FontDataAdvanced *p_font_data);
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void _generateMTSDF_threaded(uint32_t y, void *p_td) const;
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_FORCE_INLINE_ Vector2i _get_size(const FontDataAdvanced *p_font_data, int p_size) const {
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if (p_font_data->msdf) {
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return Vector2i(p_font_data->msdf_source_size, 0);
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} else if (p_font_data->fixed_size > 0) {
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return Vector2i(p_font_data->fixed_size, 0);
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} else {
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return Vector2i(p_size, 0);
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}
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}
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_FORCE_INLINE_ Vector2i _get_size_outline(const FontDataAdvanced *p_font_data, const Vector2i &p_size) const {
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if (p_font_data->msdf) {
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return Vector2i(p_font_data->msdf_source_size, 0);
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} else if (p_font_data->fixed_size > 0) {
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return Vector2i(p_font_data->fixed_size, MIN(p_size.y, 1));
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} else {
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return p_size;
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}
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}
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// Shaped text cache data.
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struct ShapedTextDataAdvanced : public ShapedTextData {
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/* Intermediate data */
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Char16String utf16;
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Vector<UBiDi *> bidi_iter;
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Vector<Vector2i> bidi_override;
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ScriptIterator *script_iter = nullptr;
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hb_buffer_t *hb_buffer = nullptr;
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~ShapedTextDataAdvanced() {
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for (int i = 0; i < bidi_iter.size(); i++) {
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ubidi_close(bidi_iter[i]);
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}
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if (script_iter) {
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memdelete(script_iter);
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}
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if (hb_buffer) {
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hb_buffer_destroy(hb_buffer);
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}
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}
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};
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// Common data.
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float oversampling = 1.f;
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mutable RID_PtrOwner<FontDataAdvanced> font_owner;
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mutable RID_PtrOwner<ShapedTextDataAdvanced> shaped_owner;
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int _convert_pos(const ShapedTextDataAdvanced *p_sd, int p_pos) const;
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int _convert_pos_inv(const ShapedTextDataAdvanced *p_sd, int p_pos) const;
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void _shape_run(ShapedTextDataAdvanced *p_sd, int32_t p_start, int32_t p_end, hb_script_t p_script, hb_direction_t p_direction, Vector<RID> p_fonts, int p_span, int p_fb_index);
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Glyph _shape_single_glyph(ShapedTextDataAdvanced *p_sd, char32_t p_char, hb_script_t p_script, hb_direction_t p_direction, RID p_font, int p_font_size);
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// HarfBuzz bitmap font interface.
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static hb_font_funcs_t *funcs;
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struct hb_bmp_font_t {
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TextServerAdvanced::FontDataForSizeAdvanced *face = nullptr;
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bool unref = false; /* Whether to destroy bm_face when done. */
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};
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static hb_bmp_font_t *_hb_bmp_font_create(TextServerAdvanced::FontDataForSizeAdvanced *p_face, bool p_unref);
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static void _hb_bmp_font_destroy(void *p_data);
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static hb_bool_t hb_bmp_get_nominal_glyph(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_unicode, hb_codepoint_t *r_glyph, void *p_user_data);
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static hb_position_t hb_bmp_get_glyph_h_advance(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, void *p_user_data);
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static hb_position_t hb_bmp_get_glyph_v_advance(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, void *p_user_data);
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static hb_position_t hb_bmp_get_glyph_h_kerning(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_left_glyph, hb_codepoint_t p_right_glyph, void *p_user_data);
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static hb_bool_t hb_bmp_get_glyph_v_origin(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, hb_position_t *r_x, hb_position_t *r_y, void *p_user_data);
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static hb_bool_t hb_bmp_get_glyph_extents(hb_font_t *p_font, void *p_font_data, hb_codepoint_t p_glyph, hb_glyph_extents_t *r_extents, void *p_user_data);
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static hb_bool_t hb_bmp_get_font_h_extents(hb_font_t *p_font, void *p_font_data, hb_font_extents_t *r_metrics, void *p_user_data);
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static void hb_bmp_create_font_funcs();
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static void hb_bmp_free_font_funcs();
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static void _hb_bmp_font_set_funcs(hb_font_t *p_font, TextServerAdvanced::FontDataForSizeAdvanced *p_face, bool p_unref);
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static hb_font_t *hb_bmp_font_create(TextServerAdvanced::FontDataForSizeAdvanced *p_face, hb_destroy_func_t p_destroy);
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protected:
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static void _bind_methods(){};
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void full_copy(ShapedTextDataAdvanced *p_shaped);
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void invalidate(ShapedTextDataAdvanced *p_shaped);
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public:
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virtual bool has_feature(Feature p_feature) const override;
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virtual String get_name() const override;
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virtual uint32_t get_features() const override;
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virtual void free(RID p_rid) override;
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virtual bool has(RID p_rid) override;
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virtual bool load_support_data(const String &p_filename) override;
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virtual String get_support_data_filename() const override;
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virtual String get_support_data_info() const override;
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virtual bool save_support_data(const String &p_filename) const override;
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virtual bool is_locale_right_to_left(const String &p_locale) const override;
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virtual int32_t name_to_tag(const String &p_name) const override;
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virtual String tag_to_name(int32_t p_tag) const override;
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/* Font interface */
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virtual RID create_font() override;
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virtual void font_set_data(RID p_font_rid, const PackedByteArray &p_data) override;
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virtual void font_set_data_ptr(RID p_font_rid, const uint8_t *p_data_ptr, size_t p_data_size) override;
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virtual void font_set_antialiased(RID p_font_rid, bool p_antialiased) override;
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virtual bool font_is_antialiased(RID p_font_rid) const override;
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virtual void font_set_multichannel_signed_distance_field(RID p_font_rid, bool p_msdf) override;
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virtual bool font_is_multichannel_signed_distance_field(RID p_font_rid) const override;
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virtual void font_set_msdf_pixel_range(RID p_font_rid, int p_msdf_pixel_range) override;
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virtual int font_get_msdf_pixel_range(RID p_font_rid) const override;
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virtual void font_set_msdf_size(RID p_font_rid, int p_msdf_size) override;
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virtual int font_get_msdf_size(RID p_font_rid) const override;
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virtual void font_set_fixed_size(RID p_font_rid, int p_fixed_size) override;
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virtual int font_get_fixed_size(RID p_font_rid) const override;
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virtual void font_set_force_autohinter(RID p_font_rid, bool p_force_autohinter) override;
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virtual bool font_is_force_autohinter(RID p_font_rid) const override;
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virtual void font_set_hinting(RID p_font_rid, TextServer::Hinting p_hinting) override;
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virtual TextServer::Hinting font_get_hinting(RID p_font_rid) const override;
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virtual void font_set_variation_coordinates(RID p_font_rid, const Dictionary &p_variation_coordinates) override;
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virtual Dictionary font_get_variation_coordinates(RID p_font_rid) const override;
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virtual void font_set_oversampling(RID p_font_rid, float p_oversampling) override;
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virtual float font_get_oversampling(RID p_font_rid) const override;
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virtual Array font_get_size_cache_list(RID p_font_rid) const override;
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virtual void font_clear_size_cache(RID p_font_rid) override;
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virtual void font_remove_size_cache(RID p_font_rid, const Vector2i &p_size) override;
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hb_font_t *_font_get_hb_handle(RID p_font, int p_font_size) const;
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virtual void font_set_ascent(RID p_font_rid, int p_size, float p_ascent) override;
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virtual float font_get_ascent(RID p_font_rid, int p_size) const override;
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virtual void font_set_descent(RID p_font_rid, int p_size, float p_descent) override;
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virtual float font_get_descent(RID p_font_rid, int p_size) const override;
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virtual void font_set_underline_position(RID p_font_rid, int p_size, float p_underline_position) override;
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virtual float font_get_underline_position(RID p_font_rid, int p_size) const override;
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virtual void font_set_underline_thickness(RID p_font_rid, int p_size, float p_underline_thickness) override;
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virtual float font_get_underline_thickness(RID p_font_rid, int p_size) const override;
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virtual void font_set_scale(RID p_font_rid, int p_size, float p_scale) override;
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virtual float font_get_scale(RID p_font_rid, int p_size) const override;
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virtual void font_set_spacing(RID p_font_rid, int p_size, SpacingType p_spacing, int p_value) override;
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virtual int font_get_spacing(RID p_font_rid, int p_size, SpacingType p_spacing) const override;
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virtual int font_get_texture_count(RID p_font_rid, const Vector2i &p_size) const override;
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virtual void font_clear_textures(RID p_font_rid, const Vector2i &p_size) override;
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virtual void font_remove_texture(RID p_font_rid, const Vector2i &p_size, int p_texture_index) override;
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virtual void font_set_texture_image(RID p_font_rid, const Vector2i &p_size, int p_texture_index, const Ref<Image> &p_image) override;
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virtual Ref<Image> font_get_texture_image(RID p_font_rid, const Vector2i &p_size, int p_texture_index) const override;
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virtual void font_set_texture_offsets(RID p_font_rid, const Vector2i &p_size, int p_texture_index, const PackedInt32Array &p_offset) override;
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virtual PackedInt32Array font_get_texture_offsets(RID p_font_rid, const Vector2i &p_size, int p_texture_index) const override;
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virtual Array font_get_glyph_list(RID p_font_rid, const Vector2i &p_size) const override;
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virtual void font_clear_glyphs(RID p_font_rid, const Vector2i &p_size) override;
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virtual void font_remove_glyph(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) override;
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virtual Vector2 font_get_glyph_advance(RID p_font_rid, int p_size, int32_t p_glyph) const override;
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virtual void font_set_glyph_advance(RID p_font_rid, int p_size, int32_t p_glyph, const Vector2 &p_advance) override;
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virtual Vector2 font_get_glyph_offset(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const override;
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virtual void font_set_glyph_offset(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Vector2 &p_offset) override;
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virtual Vector2 font_get_glyph_size(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const override;
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virtual void font_set_glyph_size(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Vector2 &p_gl_size) override;
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virtual Rect2 font_get_glyph_uv_rect(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const override;
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virtual void font_set_glyph_uv_rect(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, const Rect2 &p_uv_rect) override;
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virtual int font_get_glyph_texture_idx(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph) const override;
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virtual void font_set_glyph_texture_idx(RID p_font_rid, const Vector2i &p_size, int32_t p_glyph, int p_texture_idx) override;
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virtual Dictionary font_get_glyph_contours(RID p_font, int p_size, int32_t p_index) const override;
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virtual Array font_get_kerning_list(RID p_font_rid, int p_size) const override;
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virtual void font_clear_kerning_map(RID p_font_rid, int p_size) override;
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virtual void font_remove_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair) override;
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virtual void font_set_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair, const Vector2 &p_kerning) override;
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virtual Vector2 font_get_kerning(RID p_font_rid, int p_size, const Vector2i &p_glyph_pair) const override;
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virtual int32_t font_get_glyph_index(RID p_font_rid, int p_size, char32_t p_char, char32_t p_variation_selector = 0) const override;
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virtual bool font_has_char(RID p_font_rid, char32_t p_char) const override;
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virtual String font_get_supported_chars(RID p_font_rid) const override;
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virtual void font_render_range(RID p_font, const Vector2i &p_size, char32_t p_start, char32_t p_end) override;
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virtual void font_render_glyph(RID p_font_rid, const Vector2i &p_size, int32_t p_index) override;
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virtual void font_draw_glyph(RID p_font, RID p_canvas, int p_size, const Vector2 &p_pos, int32_t p_index, const Color &p_color = Color(1, 1, 1)) const override;
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virtual void font_draw_glyph_outline(RID p_font, RID p_canvas, int p_size, int p_outline_size, const Vector2 &p_pos, int32_t p_index, const Color &p_color = Color(1, 1, 1)) const override;
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virtual bool font_is_language_supported(RID p_font_rid, const String &p_language) const override;
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virtual void font_set_language_support_override(RID p_font_rid, const String &p_language, bool p_supported) override;
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virtual bool font_get_language_support_override(RID p_font_rid, const String &p_language) override;
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virtual void font_remove_language_support_override(RID p_font_rid, const String &p_language) override;
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virtual Vector<String> font_get_language_support_overrides(RID p_font_rid) override;
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virtual bool font_is_script_supported(RID p_font_rid, const String &p_script) const override;
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virtual void font_set_script_support_override(RID p_font_rid, const String &p_script, bool p_supported) override;
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virtual bool font_get_script_support_override(RID p_font_rid, const String &p_script) override;
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virtual void font_remove_script_support_override(RID p_font_rid, const String &p_script) override;
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virtual Vector<String> font_get_script_support_overrides(RID p_font_rid) override;
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virtual Dictionary font_supported_feature_list(RID p_font_rid) const override;
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virtual Dictionary font_supported_variation_list(RID p_font_rid) const override;
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virtual float font_get_global_oversampling() const override;
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virtual void font_set_global_oversampling(float p_oversampling) override;
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/* Shaped text buffer interface */
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virtual RID create_shaped_text(Direction p_direction = DIRECTION_AUTO, Orientation p_orientation = ORIENTATION_HORIZONTAL) override;
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virtual void shaped_text_clear(RID p_shaped) override;
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virtual void shaped_text_set_direction(RID p_shaped, Direction p_direction = DIRECTION_AUTO) override;
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virtual Direction shaped_text_get_direction(RID p_shaped) const override;
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virtual void shaped_text_set_bidi_override(RID p_shaped, const Array &p_override) override;
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virtual void shaped_text_set_orientation(RID p_shaped, Orientation p_orientation = ORIENTATION_HORIZONTAL) override;
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virtual Orientation shaped_text_get_orientation(RID p_shaped) const override;
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virtual void shaped_text_set_preserve_invalid(RID p_shaped, bool p_enabled) override;
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virtual bool shaped_text_get_preserve_invalid(RID p_shaped) const override;
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virtual void shaped_text_set_preserve_control(RID p_shaped, bool p_enabled) override;
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virtual bool shaped_text_get_preserve_control(RID p_shaped) const override;
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virtual bool shaped_text_add_string(RID p_shaped, const String &p_text, const Vector<RID> &p_fonts, int p_size, const Dictionary &p_opentype_features = Dictionary(), const String &p_language = "") override;
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virtual bool shaped_text_add_object(RID p_shaped, Variant p_key, const Size2 &p_size, InlineAlign p_inline_align = INLINE_ALIGN_CENTER, int p_length = 1) override;
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virtual bool shaped_text_resize_object(RID p_shaped, Variant p_key, const Size2 &p_size, InlineAlign p_inline_align = INLINE_ALIGN_CENTER) override;
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virtual RID shaped_text_substr(RID p_shaped, int p_start, int p_length) const override;
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virtual RID shaped_text_get_parent(RID p_shaped) const override;
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virtual float shaped_text_fit_to_width(RID p_shaped, float p_width, uint16_t /*JustificationFlag*/ p_jst_flags = JUSTIFICATION_WORD_BOUND | JUSTIFICATION_KASHIDA) override;
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virtual float shaped_text_tab_align(RID p_shaped, const PackedFloat32Array &p_tab_stops) override;
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virtual bool shaped_text_shape(RID p_shaped) override;
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virtual bool shaped_text_update_breaks(RID p_shaped) override;
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virtual bool shaped_text_update_justification_ops(RID p_shaped) override;
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virtual int shaped_text_get_trim_pos(RID p_shaped) const override;
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virtual int shaped_text_get_ellipsis_pos(RID p_shaped) const override;
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virtual const Glyph *shaped_text_get_ellipsis_glyphs(RID p_shaped) const override;
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virtual int shaped_text_get_ellipsis_glyph_count(RID p_shaped) const override;
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virtual void shaped_text_overrun_trim_to_width(RID p_shaped, float p_width, uint16_t p_trim_flags) override;
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virtual bool shaped_text_is_ready(RID p_shaped) const override;
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virtual const Glyph *shaped_text_get_glyphs(RID p_shaped) const override;
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virtual const Glyph *shaped_text_sort_logical(RID p_shaped) override;
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virtual int shaped_text_get_glyph_count(RID p_shaped) const override;
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virtual Vector2i shaped_text_get_range(RID p_shaped) const override;
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virtual Array shaped_text_get_objects(RID p_shaped) const override;
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virtual Rect2 shaped_text_get_object_rect(RID p_shaped, Variant p_key) const override;
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virtual Size2 shaped_text_get_size(RID p_shaped) const override;
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virtual float shaped_text_get_ascent(RID p_shaped) const override;
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virtual float shaped_text_get_descent(RID p_shaped) const override;
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virtual float shaped_text_get_width(RID p_shaped) const override;
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virtual float shaped_text_get_underline_position(RID p_shaped) const override;
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virtual float shaped_text_get_underline_thickness(RID p_shaped) const override;
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virtual String format_number(const String &p_string, const String &p_language = "") const override;
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virtual String parse_number(const String &p_string, const String &p_language = "") const override;
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virtual String percent_sign(const String &p_language = "") const override;
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TextServerAdvanced();
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~TextServerAdvanced();
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};
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#endif // TEXT_SERVER_ADV_H
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