403 lines
12 KiB
C++
403 lines
12 KiB
C++
/**************************************************************************/
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/* dynamic_font.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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_H
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#define DYNAMIC_FONT_H
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#include "modules/modules_enabled.gen.h" // For freetype.
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#ifdef MODULE_FREETYPE_ENABLED
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#include "core/io/resource_loader.h"
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#include "core/os/mutex.h"
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#include "core/os/thread_safe.h"
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#include "core/pair.h"
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#include "scene/resources/font.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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class DynamicFontAtSize;
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class DynamicFont;
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class DynamicFontData : public Resource {
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GDCLASS(DynamicFontData, Resource);
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public:
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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 : 8;
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uint32_t mipmaps : 1;
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uint32_t filter : 1;
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uint32_t unused : 6;
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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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CacheID() {
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key = 0;
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}
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};
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enum Hinting {
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HINTING_NONE,
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HINTING_LIGHT,
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HINTING_NORMAL
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};
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bool is_antialiased() const;
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void set_antialiased(bool p_antialiased);
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Hinting get_hinting() const;
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void set_hinting(Hinting p_hinting);
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private:
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const uint8_t *font_mem;
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int font_mem_size;
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bool antialiased;
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bool force_autohinter;
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Hinting hinting;
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Vector<uint8_t> _fontdata;
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float override_oversampling;
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String font_path;
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Map<CacheID, DynamicFontAtSize *> size_cache;
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friend class DynamicFontAtSize;
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friend class DynamicFont;
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Ref<DynamicFontAtSize> _get_dynamic_font_at_size(CacheID p_cache_id);
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protected:
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static void _bind_methods();
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public:
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void set_font_ptr(const uint8_t *p_font_mem, int p_font_mem_size);
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void set_font_path(const String &p_path);
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String get_font_path() const;
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void set_force_autohinter(bool p_force);
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float get_override_oversampling() const;
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void set_override_oversampling(float p_oversampling);
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DynamicFontData();
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~DynamicFontData();
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};
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VARIANT_ENUM_CAST(DynamicFontData::Hinting);
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class DynamicFontAtSize : public Reference {
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GDCLASS(DynamicFontAtSize, Reference);
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_THREAD_SAFE_CLASS_
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FT_Library library; /* handle to library */
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FT_Face face; /* handle to face object */
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FT_StreamRec stream;
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float ascent;
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float descent;
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float linegap;
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float rect_margin;
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float oversampling;
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float scale_color_font;
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uint32_t texture_flags;
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bool valid;
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struct FontTexturePosition {
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int32_t index = -1;
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int32_t x = 0;
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int32_t y = 0;
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FontTexturePosition() {}
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FontTexturePosition(int32_t p_id, int32_t p_x, int32_t p_y) :
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index(p_id), x(p_x), y(p_y) {}
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};
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struct Shelf {
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int32_t x = 0;
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int32_t y = 0;
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int32_t w = 0;
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int32_t h = 0;
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FontTexturePosition alloc_shelf(int32_t p_id, int32_t p_w, int32_t p_h) {
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if (p_w > w || p_h > h) {
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return FontTexturePosition(-1, 0, 0);
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}
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int32_t xx = x;
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x += p_w;
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w -= p_w;
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return FontTexturePosition(p_id, xx, y);
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}
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Shelf() {}
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Shelf(int32_t p_x, int32_t p_y, int32_t p_w, int32_t p_h) :
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x(p_x), y(p_y), w(p_w), h(p_h) {}
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};
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struct ShelfPackTexture {
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int32_t texture_size = 1024;
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PoolVector<uint8_t> imgdata;
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Ref<ImageTexture> texture;
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List<Shelf> shelves;
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Image::Format format;
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bool dirty = true;
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FontTexturePosition pack_rect(int32_t p_id, int32_t p_h, int32_t p_w) {
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int32_t y = 0;
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int32_t waste = 0;
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List<Shelf>::Element *best_shelf = nullptr;
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int32_t best_waste = std::numeric_limits<std::int32_t>::max();
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for (List<Shelf>::Element *E = shelves.front(); E; E = E->next()) {
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y += E->get().h;
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if (p_w > E->get().w) {
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continue;
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}
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if (p_h == E->get().h) {
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return E->get().alloc_shelf(p_id, p_w, p_h);
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}
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if (p_h > E->get().h) {
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continue;
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}
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if (p_h < E->get().h) {
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waste = (E->get().h - p_h) * p_w;
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if (waste < best_waste) {
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best_waste = waste;
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best_shelf = E;
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}
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}
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}
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if (best_shelf) {
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return best_shelf->get().alloc_shelf(p_id, p_w, p_h);
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}
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if (p_h <= (texture_size - y) && p_w <= texture_size) {
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List<Shelf>::Element *E = shelves.push_back(Shelf(0, y, texture_size, p_h));
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return E->get().alloc_shelf(p_id, p_w, p_h);
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}
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return FontTexturePosition(-1, 0, 0);
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}
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ShelfPackTexture() {}
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ShelfPackTexture(int32_t p_size) :
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texture_size(p_size) {}
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};
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Vector<ShelfPackTexture> textures;
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struct Character {
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bool found;
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int texture_idx;
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Rect2 rect;
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Rect2 rect_uv;
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float v_align;
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float h_align;
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float advance;
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Character() {
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texture_idx = 0;
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v_align = 0;
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}
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static Character not_found();
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};
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const Pair<const Character *, DynamicFontAtSize *> _find_char_with_font(int32_t p_char, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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Character _make_outline_char(int32_t p_char);
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float _get_kerning_advance(const DynamicFontAtSize *font, int32_t p_char, int32_t p_next) const;
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FontTexturePosition _find_texture_pos_for_glyph(int p_color_size, Image::Format p_image_format, int p_width, int p_height);
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Character _bitmap_to_character(FT_Bitmap bitmap, int yofs, int xofs, float advance);
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HashMap<int32_t, Character> char_map;
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_FORCE_INLINE_ void _update_char(int32_t p_char);
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friend class DynamicFontData;
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Ref<DynamicFontData> font;
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DynamicFontData::CacheID id;
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Error _load();
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public:
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static float font_oversampling;
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float get_height() const;
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float get_ascent() const;
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float get_descent() const;
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Size2 get_char_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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String get_available_chars() const;
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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) const;
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RID get_char_texture(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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Size2 get_char_texture_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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Vector2 get_char_tx_offset(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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Size2 get_char_tx_size(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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Rect2 get_char_tx_uv_rect(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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void set_texture_flags(uint32_t p_flags);
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void update_oversampling();
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Dictionary get_char_contours(CharType p_char, CharType p_next, const Vector<Ref<DynamicFontAtSize>> &p_fallbacks) const;
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DynamicFontAtSize();
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~DynamicFontAtSize();
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};
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///////////////
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class DynamicFont : public Font {
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GDCLASS(DynamicFont, Font);
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public:
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enum SpacingType {
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SPACING_TOP,
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SPACING_BOTTOM,
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SPACING_CHAR,
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SPACING_SPACE
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};
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private:
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Ref<DynamicFontData> data;
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Ref<DynamicFontAtSize> data_at_size;
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Ref<DynamicFontAtSize> outline_data_at_size;
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Vector<Ref<DynamicFontData>> fallbacks;
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Vector<Ref<DynamicFontAtSize>> fallback_data_at_size;
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Vector<Ref<DynamicFontAtSize>> fallback_outline_data_at_size;
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DynamicFontData::CacheID cache_id;
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DynamicFontData::CacheID outline_cache_id;
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bool valid;
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int spacing_top;
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int spacing_bottom;
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int spacing_char;
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int spacing_space;
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Color outline_color;
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protected:
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void _reload_cache(const char *p_triggering_property = "");
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bool _set(const StringName &p_name, const Variant &p_value);
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bool _get(const StringName &p_name, Variant &r_ret) const;
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void _get_property_list(List<PropertyInfo> *p_list) const;
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static void _bind_methods();
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public:
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void set_font_data(const Ref<DynamicFontData> &p_data);
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Ref<DynamicFontData> get_font_data() const;
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void set_size(int p_size);
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int get_size() const;
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void set_outline_size(int p_size);
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int get_outline_size() const;
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void set_outline_color(Color p_color);
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Color get_outline_color() const;
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bool get_use_mipmaps() const;
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void set_use_mipmaps(bool p_enable);
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bool get_use_filter() const;
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void set_use_filter(bool p_enable);
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int get_spacing(int p_type) const;
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void set_spacing(int p_type, int p_value);
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void add_fallback(const Ref<DynamicFontData> &p_data);
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void set_fallback(int p_idx, const Ref<DynamicFontData> &p_data);
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int get_fallback_count() const;
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Ref<DynamicFontData> get_fallback(int p_idx) const;
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void remove_fallback(int p_idx);
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virtual float get_height() const;
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virtual float get_ascent() const;
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virtual float get_descent() const;
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virtual int get_spacing_char() const;
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virtual Size2 get_char_size(CharType p_char, CharType p_next = 0) const;
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String get_available_chars() const;
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virtual bool is_distance_field_hint() const;
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virtual bool has_outline() const;
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virtual float draw_char(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) const;
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RID get_char_texture(CharType p_char, CharType p_next, bool p_outline) const;
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Size2 get_char_texture_size(CharType p_char, CharType p_next, bool p_outline) const;
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Vector2 get_char_tx_offset(CharType p_char, CharType p_next, bool p_outline) const;
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Size2 get_char_tx_size(CharType p_char, CharType p_next, bool p_outline) const;
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Rect2 get_char_tx_uv_rect(CharType p_char, CharType p_next, bool p_outline) const;
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Dictionary get_char_contours(CharType p_char, CharType p_next) const;
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SelfList<DynamicFont> font_list;
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static Mutex dynamic_font_mutex;
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static SelfList<DynamicFont>::List *dynamic_fonts;
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static void initialize_dynamic_fonts();
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static void finish_dynamic_fonts();
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static void update_oversampling();
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DynamicFont();
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~DynamicFont();
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};
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VARIANT_ENUM_CAST(DynamicFont::SpacingType);
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/////////////
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class ResourceFormatLoaderDynamicFont : public ResourceFormatLoader {
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public:
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virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_no_subresource_cache = false);
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virtual void get_recognized_extensions(List<String> *p_extensions) const;
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virtual bool handles_type(const String &p_type) const;
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virtual String get_resource_type(const String &p_path) const;
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};
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#endif // MODULE_FREETYPE_ENABLED
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#endif // DYNAMIC_FONT_H
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