Cppcheck report - Godot - branch: 3.x, commit: cd92ad0f69a842d94dc2d56f83cbd8f724ed2959 (2024-12-15): scene/resources/dynamic_font.h

/**************************************************************************/
/*  dynamic_font.h                                                        */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* a copy of this software and associated documentation files (the        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
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#ifndef DYNAMIC_FONT_H
#define DYNAMIC_FONT_H

#include "modules/modules_enabled.gen.h" // For freetype.
#ifdef MODULE_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;
	Vector<uint8_t> _fontdata;
	float override_oversampling;

	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);

	float get_override_oversampling() const;
	void set_override_oversampling(float p_oversampling);

	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 FontTexturePosition {
		int32_t index = -1;
		int32_t x = 0;
		int32_t y = 0;

		FontTexturePosition() {}
		FontTexturePosition(int32_t p_id, int32_t p_x, int32_t p_y) :
				index(p_id), x(p_x), y(p_y) {}
	};

	struct Shelf {
		int32_t x = 0;
		int32_t y = 0;
		int32_t w = 0;
		int32_t h = 0;

		FontTexturePosition alloc_shelf(int32_t p_id, int32_t p_w, int32_t p_h) {
			if (p_w > w || p_h > h) {
				return FontTexturePosition(-1, 0, 0);
			}
			int32_t xx = x;
			x += p_w;
			w -= p_w;
			return FontTexturePosition(p_id, xx, y);
		}

		Shelf() {}
		Shelf(int32_t p_x, int32_t p_y, int32_t p_w, int32_t p_h) :
				x(p_x), y(p_y), w(p_w), h(p_h) {}
	};

	struct ShelfPackTexture {
		int32_t texture_size = 1024;
		PoolVector<uint8_t> imgdata;
		Ref<ImageTexture> texture;
		List<Shelf> shelves;
		Image::Format format;
		bool dirty = true;

		FontTexturePosition pack_rect(int32_t p_id, int32_t p_h, int32_t p_w) {
			int32_t y = 0;
			int32_t waste = 0;
			List<Shelf>::Element *best_shelf = nullptr;
			int32_t best_waste = std::numeric_limits<std::int32_t>::max();

			for (List<Shelf>::Element *E = shelves.front(); E; E = E->next()) {
				y += E->get().h;
				if (p_w > E->get().w) {
					continue;
				}
				if (p_h == E->get().h) {
					return E->get().alloc_shelf(p_id, p_w, p_h);
				}
				if (p_h > E->get().h) {
					continue;
				}
				if (p_h < E->get().h) {
					waste = (E->get().h - p_h) * p_w;
					if (waste < best_waste) {
						best_waste = waste;
						best_shelf = E;
					}
				}
			}
			if (best_shelf) {
				return best_shelf->get().alloc_shelf(p_id, p_w, p_h);
			}
			if (p_h <= (texture_size - y) && p_w <= texture_size) {
				List<Shelf>::Element *E = shelves.push_back(Shelf(0, y, texture_size, p_h));
				return E->get().alloc_shelf(p_id, p_w, p_h);
			}
			return FontTexturePosition(-1, 0, 0);
		}

		ShelfPackTexture() {}
		ShelfPackTexture(int32_t p_size) :
<--- Struct 'ShelfPackTexture' has a constructor with 1 argument that is not explicit. [+]
Struct 'ShelfPackTexture' has a constructor with 1 argument that is not explicit. Such constructors should in general be explicit for type safety reasons. Using the explicit keyword in the constructor means some mistakes when using the class can be avoided.
				texture_size(p_size) {}
	};

	Vector<ShelfPackTexture> textures;

	struct Character {
		bool found;
		int texture_idx;
		Rect2 rect;
		Rect2 rect_uv;
		float v_align;
		float h_align;
		float advance;

		Character() {<--- Member variable 'Character::found' is not initialized in the constructor.<--- Member variable 'Character::h_align' is not initialized in the constructor.<--- Member variable 'Character::advance' is not initialized in the constructor.
			texture_idx = 0;
			v_align = 0;
		}

		static Character not_found();
	};

	const Pair<const Character *, DynamicFontAtSize *> _find_char_with_font(int32_t p_char, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
	Character _make_outline_char(int32_t p_char);
	float _get_kerning_advance(const DynamicFontAtSize *font, int32_t p_char, int32_t p_next) const;
	FontTexturePosition _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);

	HashMap<int32_t, Character> char_map;

	_FORCE_INLINE_ void _update_char(int32_t p_char);

	friend class DynamicFontData;
	Ref<DynamicFontData> font;
	DynamicFontData::CacheID id;

	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;
	String get_available_chars() 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, bool p_outline = false, MultiRect *p_multirect = nullptr) const;

	RID get_char_texture(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
	Size2 get_char_texture_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;

	Vector2 get_char_tx_offset(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
	Size2 get_char_tx_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
	Rect2 get_char_tx_uv_rect(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;

	void set_texture_flags(uint32_t p_flags);
	void update_oversampling();

	Dictionary get_char_contours(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;

	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(const char *p_triggering_property = "");

	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 int get_spacing_char() const;

	virtual Size2 get_char_size(CharType p_char, CharType p_next = 0) const;
	String get_available_chars() const;

	virtual bool is_distance_field_hint() const;

	virtual bool has_outline() const;

	virtual float draw_char_ex(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, MultiRect *p_multirect = nullptr) const;

	RID get_char_texture(CharType p_char, CharType p_next, bool p_outline) const;
	Size2 get_char_texture_size(CharType p_char, CharType p_next, bool p_outline) const;

	Vector2 get_char_tx_offset(CharType p_char, CharType p_next, bool p_outline) const;
	Size2 get_char_tx_size(CharType p_char, CharType p_next, bool p_outline) const;
	Rect2 get_char_tx_uv_rect(CharType p_char, CharType p_next, bool p_outline) const;

	Dictionary get_char_contours(CharType p_char, CharType p_next) 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 = nullptr, bool p_no_subresource_cache = false);
	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 // MODULE_FREETYPE_ENABLED

#endif // DYNAMIC_FONT_H