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godot/scene/resources/font.cpp
Juan Linietsky 33b5c57199 Variant: Added 64-bit packed arrays, renamed Variant::REAL to FLOAT. 
- Renames PackedIntArray to PackedInt32Array.
- Renames PackedFloatArray to PackedFloat32Array.
- Adds PackedInt64Array and PackedFloat64Array.
- Renames Variant::REAL to Variant::FLOAT for consistency.

Packed arrays are for storing large amount of data and creating stuff like
meshes, buffers. textures, etc. Forcing them to be 64 is a huge waste of
memory. That said, many users requested the ability to have 64 bits packed
arrays for their games, so this is just an optional added type.

For Variant, the float datatype is always 64 bits, and exposed as `float`.

We still have `real_t` which is the datatype that can change from 32 to 64
bits depending on a compile flag (not entirely working right now, but that's
the idea). It affects math related datatypes and code only.

Neither Variant nor PackedArray make use of real_t, which is only intended
for math precision, so the term is removed from there to keep only float.
2020-02-25 12:55:53 +01:00

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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 = NULL;
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 = NULL;
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 != NULL; 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;
VisualServer::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) {
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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