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godot/scene/resources/font.cpp

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/*************************************************************************/
/* font.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "font.h"
#include "core/io/resource_loader.h"
#include "core/method_bind_ext.gen.inc"
#include "core/os/file_access.h"
void Font::draw_halign(RID p_canvas_item, const Point2 &p_pos, HAlign p_align, float p_width, const String &p_text, const Color &p_modulate, const Color &p_outline_modulate) const {
float length = get_string_size(p_text).width;
if (length >= p_width) {
draw(p_canvas_item, p_pos, p_text, p_modulate, p_width, p_outline_modulate);
return;
}
float ofs = 0.f;
switch (p_align) {
case HALIGN_LEFT: {
ofs = 0;
} break;
case HALIGN_CENTER: {
ofs = Math::floor((p_width - length) / 2.0);
} break;
case HALIGN_RIGHT: {
ofs = p_width - length;
} break;
default: {
ERR_PRINT("Unknown halignment type");
} break;
}
draw(p_canvas_item, p_pos + Point2(ofs, 0), p_text, p_modulate, p_width, p_outline_modulate);
}
void Font::draw(RID p_canvas_item, const Point2 &p_pos, const String &p_text, const Color &p_modulate, int p_clip_w, const Color &p_outline_modulate) const {
Vector2 ofs;
int chars_drawn = 0;
bool with_outline = has_outline();
for (int i = 0; i < p_text.length(); i++) {
int width = get_char_size(p_text[i]).width;
if (p_clip_w >= 0 && (ofs.x + width) > p_clip_w)
break; //clip
ofs.x += draw_char(p_canvas_item, p_pos + ofs, p_text[i], p_text[i + 1], with_outline ? p_outline_modulate : p_modulate, with_outline);
++chars_drawn;
}
if (has_outline()) {
ofs = Vector2(0, 0);
for (int i = 0; i < chars_drawn; i++) {
ofs.x += draw_char(p_canvas_item, p_pos + ofs, p_text[i], p_text[i + 1], p_modulate, false);
}
}
}
void Font::update_changes() {
emit_changed();
}
void Font::_bind_methods() {
ClassDB::bind_method(D_METHOD("draw", "canvas_item", "position", "string", "modulate", "clip_w", "outline_modulate"), &Font::draw, DEFVAL(Color(1, 1, 1)), DEFVAL(-1), DEFVAL(Color(1, 1, 1)));
ClassDB::bind_method(D_METHOD("get_ascent"), &Font::get_ascent);
ClassDB::bind_method(D_METHOD("get_descent"), &Font::get_descent);
ClassDB::bind_method(D_METHOD("get_height"), &Font::get_height);
ClassDB::bind_method(D_METHOD("is_distance_field_hint"), &Font::is_distance_field_hint);
ClassDB::bind_method(D_METHOD("get_string_size", "string"), &Font::get_string_size);
ClassDB::bind_method(D_METHOD("get_wordwrap_string_size", "string", "width"), &Font::get_wordwrap_string_size);
ClassDB::bind_method(D_METHOD("has_outline"), &Font::has_outline);
ClassDB::bind_method(D_METHOD("draw_char", "canvas_item", "position", "char", "next", "modulate", "outline"), &Font::draw_char, DEFVAL(-1), DEFVAL(Color(1, 1, 1)), DEFVAL(false));
ClassDB::bind_method(D_METHOD("update_changes"), &Font::update_changes);
}
Font::Font() {
}
/////////////////////////////////////////////////////////////////
void BitmapFont::_set_chars(const Vector<int> &p_chars) {
int len = p_chars.size();
//char 1 charsize 1 texture, 4 rect, 2 align, advance 1
ERR_FAIL_COND(len % 9);
if (!len)
return; //none to do
int chars = len / 9;
const int *r = p_chars.ptr();
for (int i = 0; i < chars; i++) {
const int *data = &r[i * 9];
add_char(data[0], data[1], Rect2(data[2], data[3], data[4], data[5]), Size2(data[6], data[7]), data[8]);
}
}
Vector<int> BitmapFont::_get_chars() const {
Vector<int> chars;
const CharType *key = nullptr;
while ((key = char_map.next(key))) {
const Character *c = char_map.getptr(*key);
ERR_FAIL_COND_V(!c, Vector<int>());
chars.push_back(*key);
chars.push_back(c->texture_idx);
chars.push_back(c->rect.position.x);
chars.push_back(c->rect.position.y);
chars.push_back(c->rect.size.x);
chars.push_back(c->rect.size.y);
chars.push_back(c->h_align);
chars.push_back(c->v_align);
chars.push_back(c->advance);
}
return chars;
}
void BitmapFont::_set_kernings(const Vector<int> &p_kernings) {
int len = p_kernings.size();
ERR_FAIL_COND(len % 3);
if (!len)
return;
const int *r = p_kernings.ptr();
for (int i = 0; i < len / 3; i++) {
const int *data = &r[i * 3];
add_kerning_pair(data[0], data[1], data[2]);
}
}
Vector<int> BitmapFont::_get_kernings() const {
Vector<int> kernings;
for (Map<KerningPairKey, int>::Element *E = kerning_map.front(); E; E = E->next()) {
kernings.push_back(E->key().A);
kernings.push_back(E->key().B);
kernings.push_back(E->get());
}
return kernings;
}
void BitmapFont::_set_textures(const Vector<Variant> &p_textures) {
textures.clear();
for (int i = 0; i < p_textures.size(); i++) {
Ref<Texture2D> tex = p_textures[i];
ERR_CONTINUE(!tex.is_valid());
add_texture(tex);
}
}
Vector<Variant> BitmapFont::_get_textures() const {
Vector<Variant> rtextures;
for (int i = 0; i < textures.size(); i++)
rtextures.push_back(textures[i]);
return rtextures;
}
Error BitmapFont::create_from_fnt(const String &p_file) {
//fnt format used by angelcode bmfont
//http://www.angelcode.com/products/bmfont/
FileAccess *f = FileAccess::open(p_file, FileAccess::READ);
ERR_FAIL_COND_V_MSG(!f, ERR_FILE_NOT_FOUND, "Can't open font: " + p_file + ".");
clear();
while (true) {
String line = f->get_line();
int delimiter = line.find(" ");
String type = line.substr(0, delimiter);
int pos = delimiter + 1;
Map<String, String> keys;
while (pos < line.size() && line[pos] == ' ')
pos++;
while (pos < line.size()) {
int eq = line.find("=", pos);
if (eq == -1)
break;
String key = line.substr(pos, eq - pos);
int end = -1;
String value;
if (line[eq + 1] == '"') {
end = line.find("\"", eq + 2);
if (end == -1)
break;
value = line.substr(eq + 2, end - 1 - eq - 1);
pos = end + 1;
} else {
end = line.find(" ", eq + 1);
if (end == -1)
end = line.size();
value = line.substr(eq + 1, end - eq);
pos = end;
}
while (pos < line.size() && line[pos] == ' ')
pos++;
keys[key] = value;
}
if (type == "info") {
if (keys.has("face"))
set_name(keys["face"]);
/*
if (keys.has("size"))
font->set_height(keys["size"].to_int());
*/
} else if (type == "common") {
if (keys.has("lineHeight"))
set_height(keys["lineHeight"].to_int());
if (keys.has("base"))
set_ascent(keys["base"].to_int());
} else if (type == "page") {
if (keys.has("file")) {
String base_dir = p_file.get_base_dir();
String file = base_dir.plus_file(keys["file"]);
Ref<Texture2D> tex = ResourceLoader::load(file);
if (tex.is_null()) {
ERR_PRINT("Can't load font texture!");
} else {
add_texture(tex);
}
}
} else if (type == "char") {
CharType idx = 0;
if (keys.has("id"))
idx = keys["id"].to_int();
Rect2 rect;
if (keys.has("x"))
rect.position.x = keys["x"].to_int();
if (keys.has("y"))
rect.position.y = keys["y"].to_int();
if (keys.has("width"))
rect.size.width = keys["width"].to_int();
if (keys.has("height"))
rect.size.height = keys["height"].to_int();
Point2 ofs;
if (keys.has("xoffset"))
ofs.x = keys["xoffset"].to_int();
if (keys.has("yoffset"))
ofs.y = keys["yoffset"].to_int();
int texture = 0;
if (keys.has("page"))
texture = keys["page"].to_int();
int advance = -1;
if (keys.has("xadvance"))
advance = keys["xadvance"].to_int();
add_char(idx, texture, rect, ofs, advance);
} else if (type == "kerning") {
CharType first = 0, second = 0;
int k = 0;
if (keys.has("first"))
first = keys["first"].to_int();
if (keys.has("second"))
second = keys["second"].to_int();
if (keys.has("amount"))
k = keys["amount"].to_int();
add_kerning_pair(first, second, -k);
}
if (f->eof_reached())
break;
}
memdelete(f);
return OK;
}
void BitmapFont::set_height(float p_height) {
height = p_height;
}
float BitmapFont::get_height() const {
return height;
}
void BitmapFont::set_ascent(float p_ascent) {
ascent = p_ascent;
}
float BitmapFont::get_ascent() const {
return ascent;
}
float BitmapFont::get_descent() const {
return height - ascent;
}
void BitmapFont::add_texture(const Ref<Texture2D> &p_texture) {
ERR_FAIL_COND_MSG(p_texture.is_null(), "It's not a reference to a valid Texture object.");
textures.push_back(p_texture);
}
int BitmapFont::get_texture_count() const {
return textures.size();
};
Ref<Texture2D> BitmapFont::get_texture(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, textures.size(), Ref<Texture2D>());
return textures[p_idx];
};
int BitmapFont::get_character_count() const {
return char_map.size();
};
Vector<CharType> BitmapFont::get_char_keys() const {
Vector<CharType> chars;
chars.resize(char_map.size());
const CharType *ct = nullptr;
int count = 0;
while ((ct = char_map.next(ct))) {
chars.write[count++] = *ct;
};
return chars;
};
BitmapFont::Character BitmapFont::get_character(CharType p_char) const {
if (!char_map.has(p_char)) {
ERR_FAIL_V(Character());
};
return char_map[p_char];
};
void BitmapFont::add_char(CharType p_char, int p_texture_idx, const Rect2 &p_rect, const Size2 &p_align, float p_advance) {
if (p_advance < 0)
p_advance = p_rect.size.width;
Character c;
c.rect = p_rect;
c.texture_idx = p_texture_idx;
c.v_align = p_align.y;
c.advance = p_advance;
c.h_align = p_align.x;
char_map[p_char] = c;
}
void BitmapFont::add_kerning_pair(CharType p_A, CharType p_B, int p_kerning) {
KerningPairKey kpk;
kpk.A = p_A;
kpk.B = p_B;
if (p_kerning == 0 && kerning_map.has(kpk)) {
kerning_map.erase(kpk);
} else {
kerning_map[kpk] = p_kerning;
}
}
Vector<BitmapFont::KerningPairKey> BitmapFont::get_kerning_pair_keys() const {
Vector<BitmapFont::KerningPairKey> ret;
ret.resize(kerning_map.size());
int i = 0;
for (Map<KerningPairKey, int>::Element *E = kerning_map.front(); E; E = E->next()) {
ret.write[i++] = E->key();
}
return ret;
}
int BitmapFont::get_kerning_pair(CharType p_A, CharType p_B) const {
KerningPairKey kpk;
kpk.A = p_A;
kpk.B = p_B;
const Map<KerningPairKey, int>::Element *E = kerning_map.find(kpk);
if (E)
return E->get();
return 0;
}
void BitmapFont::set_distance_field_hint(bool p_distance_field) {
distance_field_hint = p_distance_field;
emit_changed();
}
bool BitmapFont::is_distance_field_hint() const {
return distance_field_hint;
}
void BitmapFont::clear() {
height = 1;
ascent = 0;
char_map.clear();
textures.clear();
kerning_map.clear();
distance_field_hint = false;
}
Size2 Font::get_string_size(const String &p_string) const {
float w = 0;
int l = p_string.length();
if (l == 0)
return Size2(0, get_height());
const CharType *sptr = &p_string[0];
for (int i = 0; i < l; i++) {
w += get_char_size(sptr[i], sptr[i + 1]).width;
}
return Size2(w, get_height());
}
Size2 Font::get_wordwrap_string_size(const String &p_string, float p_width) const {
ERR_FAIL_COND_V(p_width <= 0, Vector2(0, get_height()));
int l = p_string.length();
if (l == 0)
return Size2(p_width, get_height());
float line_w = 0;
float h = 0;
float space_w = get_char_size(' ').width;
Vector<String> lines = p_string.split("\n");
for (int i = 0; i < lines.size(); i++) {
h += get_height();
String t = lines[i];
line_w = 0;
Vector<String> words = t.split(" ");
for (int j = 0; j < words.size(); j++) {
line_w += get_string_size(words[j]).x;
if (line_w > p_width) {
h += get_height();
line_w = get_string_size(words[j]).x;
} else {
line_w += space_w;
}
}
}
return Size2(p_width, h);
}
void BitmapFont::set_fallback(const Ref<BitmapFont> &p_fallback) {
for (Ref<BitmapFont> fallback_child = p_fallback; fallback_child != nullptr; fallback_child = fallback_child->get_fallback()) {
ERR_FAIL_COND_MSG(fallback_child == this, "Can't set as fallback one of its parents to prevent crashes due to recursive loop.");
}
fallback = p_fallback;
}
Ref<BitmapFont> BitmapFont::get_fallback() const {
return fallback;
}
float BitmapFont::draw_char(RID p_canvas_item, const Point2 &p_pos, CharType p_char, CharType p_next, const Color &p_modulate, bool p_outline) const {
const Character *c = char_map.getptr(p_char);
if (!c) {
if (fallback.is_valid())
return fallback->draw_char(p_canvas_item, p_pos, p_char, p_next, p_modulate, p_outline);
return 0;
}
ERR_FAIL_COND_V(c->texture_idx < -1 || c->texture_idx >= textures.size(), 0);
if (!p_outline && c->texture_idx != -1) {
Point2 cpos = p_pos;
cpos.x += c->h_align;
cpos.y -= ascent;
cpos.y += c->v_align;
RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas_item, Rect2(cpos, c->rect.size), textures[c->texture_idx]->get_rid(), c->rect, p_modulate, false, RID(), RID(), Color(1, 1, 1, 1), false);
}
return get_char_size(p_char, p_next).width;
}
Size2 BitmapFont::get_char_size(CharType p_char, CharType p_next) const {
const Character *c = char_map.getptr(p_char);
if (!c) {
if (fallback.is_valid())
return fallback->get_char_size(p_char, p_next);
return Size2();
}
Size2 ret(c->advance, c->rect.size.y);
if (p_next) {
KerningPairKey kpk;
kpk.A = p_char;
kpk.B = p_next;
const Map<KerningPairKey, int>::Element *E = kerning_map.find(kpk);
if (E) {
ret.width -= E->get();
}
}
return ret;
}
void BitmapFont::_bind_methods() {
ClassDB::bind_method(D_METHOD("create_from_fnt", "path"), &BitmapFont::create_from_fnt);
ClassDB::bind_method(D_METHOD("set_height", "px"), &BitmapFont::set_height);
ClassDB::bind_method(D_METHOD("set_ascent", "px"), &BitmapFont::set_ascent);
ClassDB::bind_method(D_METHOD("add_kerning_pair", "char_a", "char_b", "kerning"), &BitmapFont::add_kerning_pair);
ClassDB::bind_method(D_METHOD("get_kerning_pair", "char_a", "char_b"), &BitmapFont::get_kerning_pair);
ClassDB::bind_method(D_METHOD("add_texture", "texture"), &BitmapFont::add_texture);
ClassDB::bind_method(D_METHOD("add_char", "character", "texture", "rect", "align", "advance"), &BitmapFont::add_char, DEFVAL(Point2()), DEFVAL(-1));
ClassDB::bind_method(D_METHOD("get_texture_count"), &BitmapFont::get_texture_count);
ClassDB::bind_method(D_METHOD("get_texture", "idx"), &BitmapFont::get_texture);
ClassDB::bind_method(D_METHOD("get_char_size", "char", "next"), &BitmapFont::get_char_size, DEFVAL(0));
ClassDB::bind_method(D_METHOD("set_distance_field_hint", "enable"), &BitmapFont::set_distance_field_hint);
ClassDB::bind_method(D_METHOD("clear"), &BitmapFont::clear);
ClassDB::bind_method(D_METHOD("_set_chars"), &BitmapFont::_set_chars);
ClassDB::bind_method(D_METHOD("_get_chars"), &BitmapFont::_get_chars);
ClassDB::bind_method(D_METHOD("_set_kernings"), &BitmapFont::_set_kernings);
ClassDB::bind_method(D_METHOD("_get_kernings"), &BitmapFont::_get_kernings);
ClassDB::bind_method(D_METHOD("_set_textures"), &BitmapFont::_set_textures);
ClassDB::bind_method(D_METHOD("_get_textures"), &BitmapFont::_get_textures);
ClassDB::bind_method(D_METHOD("set_fallback", "fallback"), &BitmapFont::set_fallback);
ClassDB::bind_method(D_METHOD("get_fallback"), &BitmapFont::get_fallback);
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "textures", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_textures", "_get_textures");
ADD_PROPERTY(PropertyInfo(Variant::PACKED_INT32_ARRAY, "chars", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_chars", "_get_chars");
ADD_PROPERTY(PropertyInfo(Variant::PACKED_INT32_ARRAY, "kernings", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_kernings", "_get_kernings");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "height", PROPERTY_HINT_RANGE, "1,1024,1"), "set_height", "get_height");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "ascent", PROPERTY_HINT_RANGE, "0,1024,1"), "set_ascent", "get_ascent");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "distance_field"), "set_distance_field_hint", "is_distance_field_hint");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "fallback", PROPERTY_HINT_RESOURCE_TYPE, "BitmapFont"), "set_fallback", "get_fallback");
}
BitmapFont::BitmapFont() {
clear();
}
BitmapFont::~BitmapFont() {
clear();
}
////////////
RES ResourceFormatLoaderBMFont::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, bool p_no_cache) {
if (r_error)
*r_error = ERR_FILE_CANT_OPEN;
Ref<BitmapFont> font;
font.instance();
Error err = font->create_from_fnt(p_path);
if (err) {
if (r_error)
*r_error = err;
return RES();
}
return font;
}
void ResourceFormatLoaderBMFont::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("fnt");
}
bool ResourceFormatLoaderBMFont::handles_type(const String &p_type) const {
return (p_type == "BitmapFont");
}
String ResourceFormatLoaderBMFont::get_resource_type(const String &p_path) const {
String el = p_path.get_extension().to_lower();
if (el == "fnt")
return "BitmapFont";
return "";
}
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