598 lines
16 KiB
C++
598 lines
16 KiB
C++
/*************************************************************************/
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/* font.cpp */
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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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 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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#include "font.h"
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#include "core/io/resource_loader.h"
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#include "core/os/file_access.h"
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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 {
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float length = get_string_size(p_text).width;
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if (length >= p_width) {
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draw(p_canvas_item, p_pos, p_text, p_modulate, p_width);
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return;
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}
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float ofs = 0.f;
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switch (p_align) {
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case HALIGN_LEFT: {
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ofs = 0;
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} break;
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case HALIGN_CENTER: {
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ofs = Math::floor((p_width - length) / 2.0);
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} break;
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case HALIGN_RIGHT: {
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ofs = p_width - length;
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} break;
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default: {
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ERR_PRINT("Unknown halignment type");
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} break;
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}
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draw(p_canvas_item, p_pos + Point2(ofs, 0), p_text, p_modulate, p_width);
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}
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void Font::draw(RID p_canvas_item, const Point2 &p_pos, const String &p_text, const Color &p_modulate, int p_clip_w) const {
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Vector2 ofs;
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for (int i = 0; i < p_text.length(); i++) {
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int width = get_char_size(p_text[i]).width;
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if (p_clip_w >= 0 && (ofs.x + width) > p_clip_w)
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break; //clip
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ofs.x += draw_char(p_canvas_item, p_pos + ofs, p_text[i], p_text[i + 1], p_modulate);
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}
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}
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void Font::update_changes() {
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emit_changed();
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}
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void Font::_bind_methods() {
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ClassDB::bind_method(D_METHOD("draw", "canvas_item", "position", "string", "modulate", "clip_w"), &Font::draw, DEFVAL(Color(1, 1, 1)), DEFVAL(-1));
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ClassDB::bind_method(D_METHOD("get_ascent"), &Font::get_ascent);
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ClassDB::bind_method(D_METHOD("get_descent"), &Font::get_descent);
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ClassDB::bind_method(D_METHOD("get_height"), &Font::get_height);
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ClassDB::bind_method(D_METHOD("is_distance_field_hint"), &Font::is_distance_field_hint);
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ClassDB::bind_method(D_METHOD("get_string_size", "string"), &Font::get_string_size);
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ClassDB::bind_method(D_METHOD("draw_char", "canvas_item", "position", "char", "next", "modulate"), &Font::draw_char, DEFVAL(-1), DEFVAL(Color(1, 1, 1)));
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ClassDB::bind_method(D_METHOD("update_changes"), &Font::update_changes);
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}
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Font::Font() {
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}
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/////////////////////////////////////////////////////////////////
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void BitmapFont::_set_chars(const PoolVector<int> &p_chars) {
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int len = p_chars.size();
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//char 1 charsize 1 texture, 4 rect, 2 align, advance 1
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ERR_FAIL_COND(len % 9);
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if (!len)
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return; //none to do
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int chars = len / 9;
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PoolVector<int>::Read r = p_chars.read();
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for (int i = 0; i < chars; i++) {
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const int *data = &r[i * 9];
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add_char(data[0], data[1], Rect2(data[2], data[3], data[4], data[5]), Size2(data[6], data[7]), data[8]);
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}
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}
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PoolVector<int> BitmapFont::_get_chars() const {
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PoolVector<int> chars;
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const CharType *key = NULL;
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while ((key = char_map.next(key))) {
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const Character *c = char_map.getptr(*key);
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chars.push_back(*key);
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chars.push_back(c->texture_idx);
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chars.push_back(c->rect.position.x);
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chars.push_back(c->rect.position.y);
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chars.push_back(c->rect.size.x);
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chars.push_back(c->rect.size.y);
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chars.push_back(c->h_align);
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chars.push_back(c->v_align);
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chars.push_back(c->advance);
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}
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return chars;
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}
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void BitmapFont::_set_kernings(const PoolVector<int> &p_kernings) {
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int len = p_kernings.size();
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ERR_FAIL_COND(len % 3);
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if (!len)
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return;
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PoolVector<int>::Read r = p_kernings.read();
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for (int i = 0; i < len / 3; i++) {
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const int *data = &r[i * 3];
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add_kerning_pair(data[0], data[1], data[2]);
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}
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}
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PoolVector<int> BitmapFont::_get_kernings() const {
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PoolVector<int> kernings;
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for (Map<KerningPairKey, int>::Element *E = kerning_map.front(); E; E = E->next()) {
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kernings.push_back(E->key().A);
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kernings.push_back(E->key().B);
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kernings.push_back(E->get());
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}
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return kernings;
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}
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void BitmapFont::_set_textures(const Vector<Variant> &p_textures) {
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for (int i = 0; i < p_textures.size(); i++) {
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Ref<Texture> tex = p_textures[i];
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ERR_CONTINUE(!tex.is_valid());
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add_texture(tex);
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}
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}
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Vector<Variant> BitmapFont::_get_textures() const {
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Vector<Variant> rtextures;
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for (int i = 0; i < textures.size(); i++)
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rtextures.push_back(textures[i].get_ref_ptr());
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return rtextures;
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}
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Error BitmapFont::create_from_fnt(const String &p_file) {
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//fnt format used by angelcode bmfont
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//http://www.angelcode.com/products/bmfont/
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FileAccess *f = FileAccess::open(p_file, FileAccess::READ);
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if (!f) {
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ERR_EXPLAIN("Can't open font: " + p_file);
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ERR_FAIL_V(ERR_FILE_NOT_FOUND);
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}
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clear();
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while (true) {
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String line = f->get_line();
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int delimiter = line.find(" ");
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String type = line.substr(0, delimiter);
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int pos = delimiter + 1;
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Map<String, String> keys;
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while (pos < line.size() && line[pos] == ' ')
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pos++;
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while (pos < line.size()) {
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int eq = line.find("=", pos);
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if (eq == -1)
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break;
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String key = line.substr(pos, eq - pos);
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int end = -1;
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String value;
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if (line[eq + 1] == '"') {
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end = line.find("\"", eq + 2);
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if (end == -1)
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break;
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value = line.substr(eq + 2, end - 1 - eq - 1);
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pos = end + 1;
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} else {
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end = line.find(" ", eq + 1);
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if (end == -1)
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end = line.size();
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value = line.substr(eq + 1, end - eq);
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pos = end;
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}
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while (pos < line.size() && line[pos] == ' ')
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pos++;
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keys[key] = value;
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}
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if (type == "info") {
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if (keys.has("face"))
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set_name(keys["face"]);
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/*
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if (keys.has("size"))
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font->set_height(keys["size"].to_int());
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*/
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} else if (type == "common") {
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if (keys.has("lineHeight"))
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set_height(keys["lineHeight"].to_int());
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if (keys.has("base"))
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set_ascent(keys["base"].to_int());
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} else if (type == "page") {
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if (keys.has("file")) {
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String file = keys["file"];
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file = p_file.get_base_dir() + "/" + file;
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Ref<Texture> tex = ResourceLoader::load(file);
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if (tex.is_null()) {
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ERR_PRINT("Can't load font texture!");
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} else {
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add_texture(tex);
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}
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}
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} else if (type == "char") {
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CharType idx = 0;
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if (keys.has("id"))
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idx = keys["id"].to_int();
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Rect2 rect;
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if (keys.has("x"))
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rect.position.x = keys["x"].to_int();
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if (keys.has("y"))
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rect.position.y = keys["y"].to_int();
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if (keys.has("width"))
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rect.size.width = keys["width"].to_int();
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if (keys.has("height"))
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rect.size.height = keys["height"].to_int();
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Point2 ofs;
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if (keys.has("xoffset"))
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ofs.x = keys["xoffset"].to_int();
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if (keys.has("yoffset"))
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ofs.y = keys["yoffset"].to_int();
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int texture = 0;
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if (keys.has("page"))
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texture = keys["page"].to_int();
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int advance = -1;
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if (keys.has("xadvance"))
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advance = keys["xadvance"].to_int();
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add_char(idx, texture, rect, ofs, advance);
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} else if (type == "kerning") {
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CharType first = 0, second = 0;
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int k = 0;
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if (keys.has("first"))
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first = keys["first"].to_int();
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if (keys.has("second"))
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second = keys["second"].to_int();
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if (keys.has("amount"))
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k = keys["amount"].to_int();
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add_kerning_pair(first, second, -k);
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}
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if (f->eof_reached())
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break;
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}
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memdelete(f);
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return OK;
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}
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void BitmapFont::set_height(float p_height) {
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height = p_height;
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}
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float BitmapFont::get_height() const {
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return height;
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}
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void BitmapFont::set_ascent(float p_ascent) {
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ascent = p_ascent;
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}
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float BitmapFont::get_ascent() const {
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return ascent;
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}
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float BitmapFont::get_descent() const {
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return height - ascent;
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}
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void BitmapFont::add_texture(const Ref<Texture> &p_texture) {
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ERR_FAIL_COND(p_texture.is_null());
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textures.push_back(p_texture);
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}
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int BitmapFont::get_texture_count() const {
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return textures.size();
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};
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Ref<Texture> BitmapFont::get_texture(int p_idx) const {
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ERR_FAIL_INDEX_V(p_idx, textures.size(), Ref<Texture>());
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return textures[p_idx];
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};
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int BitmapFont::get_character_count() const {
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return char_map.size();
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};
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Vector<CharType> BitmapFont::get_char_keys() const {
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Vector<CharType> chars;
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chars.resize(char_map.size());
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const CharType *ct = NULL;
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int count = 0;
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while ((ct = char_map.next(ct))) {
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chars[count++] = *ct;
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};
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return chars;
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};
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BitmapFont::Character BitmapFont::get_character(CharType p_char) const {
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if (!char_map.has(p_char)) {
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ERR_FAIL_V(Character());
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};
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return char_map[p_char];
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};
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void BitmapFont::add_char(CharType p_char, int p_texture_idx, const Rect2 &p_rect, const Size2 &p_align, float p_advance) {
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if (p_advance < 0)
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p_advance = p_rect.size.width;
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Character c;
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c.rect = p_rect;
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c.texture_idx = p_texture_idx;
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c.v_align = p_align.y;
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c.advance = p_advance;
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c.h_align = p_align.x;
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char_map[p_char] = c;
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}
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void BitmapFont::add_kerning_pair(CharType p_A, CharType p_B, int p_kerning) {
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KerningPairKey kpk;
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kpk.A = p_A;
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kpk.B = p_B;
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if (p_kerning == 0 && kerning_map.has(kpk)) {
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kerning_map.erase(kpk);
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} else {
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kerning_map[kpk] = p_kerning;
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}
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}
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Vector<BitmapFont::KerningPairKey> BitmapFont::get_kerning_pair_keys() const {
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Vector<BitmapFont::KerningPairKey> ret;
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ret.resize(kerning_map.size());
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int i = 0;
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for (Map<KerningPairKey, int>::Element *E = kerning_map.front(); E; E = E->next()) {
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ret[i++] = E->key();
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}
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return ret;
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}
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int BitmapFont::get_kerning_pair(CharType p_A, CharType p_B) const {
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KerningPairKey kpk;
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kpk.A = p_A;
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kpk.B = p_B;
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const Map<KerningPairKey, int>::Element *E = kerning_map.find(kpk);
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if (E)
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return E->get();
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return 0;
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}
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void BitmapFont::set_distance_field_hint(bool p_distance_field) {
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distance_field_hint = p_distance_field;
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emit_changed();
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}
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bool BitmapFont::is_distance_field_hint() const {
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return distance_field_hint;
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}
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void BitmapFont::clear() {
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height = 1;
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ascent = 0;
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char_map.clear();
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textures.clear();
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kerning_map.clear();
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distance_field_hint = false;
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}
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Size2 Font::get_string_size(const String &p_string) const {
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float w = 0;
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int l = p_string.length();
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if (l == 0)
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return Size2(0, get_height());
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const CharType *sptr = &p_string[0];
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for (int i = 0; i < l; i++) {
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w += get_char_size(sptr[i], sptr[i + 1]).width;
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}
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return Size2(w, get_height());
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}
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void BitmapFont::set_fallback(const Ref<BitmapFont> &p_fallback) {
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fallback = p_fallback;
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}
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Ref<BitmapFont> BitmapFont::get_fallback() const {
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return fallback;
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}
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float BitmapFont::draw_char(RID p_canvas_item, const Point2 &p_pos, CharType p_char, CharType p_next, const Color &p_modulate) const {
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const Character *c = char_map.getptr(p_char);
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if (!c) {
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if (fallback.is_valid())
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return fallback->draw_char(p_canvas_item, p_pos, p_char, p_next, p_modulate);
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return 0;
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}
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Point2 cpos = p_pos;
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cpos.x += c->h_align;
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cpos.y -= ascent;
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cpos.y += c->v_align;
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ERR_FAIL_COND_V(c->texture_idx < -1 || c->texture_idx >= textures.size(), 0);
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if (c->texture_idx != -1)
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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(), false);
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return get_char_size(p_char, p_next).width;
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}
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Size2 BitmapFont::get_char_size(CharType p_char, CharType p_next) const {
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const Character *c = char_map.getptr(p_char);
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if (!c) {
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if (fallback.is_valid())
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return fallback->get_char_size(p_char, p_next);
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return Size2();
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}
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Size2 ret(c->advance, c->rect.size.y);
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if (p_next) {
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KerningPairKey kpk;
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kpk.A = p_char;
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kpk.B = p_next;
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const Map<KerningPairKey, int>::Element *E = kerning_map.find(kpk);
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if (E) {
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ret.width -= E->get();
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}
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}
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return ret;
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}
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void BitmapFont::_bind_methods() {
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ClassDB::bind_method(D_METHOD("create_from_fnt", "path"), &BitmapFont::create_from_fnt);
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ClassDB::bind_method(D_METHOD("set_height", "px"), &BitmapFont::set_height);
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ClassDB::bind_method(D_METHOD("set_ascent", "px"), &BitmapFont::set_ascent);
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ClassDB::bind_method(D_METHOD("add_kerning_pair", "char_a", "char_b", "kerning"), &BitmapFont::add_kerning_pair);
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ClassDB::bind_method(D_METHOD("get_kerning_pair", "char_a", "char_b"), &BitmapFont::get_kerning_pair);
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ClassDB::bind_method(D_METHOD("add_texture", "texture"), &BitmapFont::add_texture);
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ClassDB::bind_method(D_METHOD("add_char", "character", "texture", "rect", "align", "advance"), &BitmapFont::add_char, DEFVAL(Point2()), DEFVAL(-1));
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ClassDB::bind_method(D_METHOD("get_texture_count"), &BitmapFont::get_texture_count);
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ClassDB::bind_method(D_METHOD("get_texture", "idx"), &BitmapFont::get_texture);
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ClassDB::bind_method(D_METHOD("get_char_size", "char", "next"), &BitmapFont::get_char_size, DEFVAL(0));
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ClassDB::bind_method(D_METHOD("set_distance_field_hint", "enable"), &BitmapFont::set_distance_field_hint);
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ClassDB::bind_method(D_METHOD("clear"), &BitmapFont::clear);
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ClassDB::bind_method(D_METHOD("_set_chars"), &BitmapFont::_set_chars);
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ClassDB::bind_method(D_METHOD("_get_chars"), &BitmapFont::_get_chars);
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ClassDB::bind_method(D_METHOD("_set_kernings"), &BitmapFont::_set_kernings);
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ClassDB::bind_method(D_METHOD("_get_kernings"), &BitmapFont::_get_kernings);
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ClassDB::bind_method(D_METHOD("_set_textures"), &BitmapFont::_set_textures);
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ClassDB::bind_method(D_METHOD("_get_textures"), &BitmapFont::_get_textures);
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ClassDB::bind_method(D_METHOD("set_fallback", "fallback"), &BitmapFont::set_fallback);
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ClassDB::bind_method(D_METHOD("get_fallback"), &BitmapFont::get_fallback);
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ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "textures", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_textures", "_get_textures");
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ADD_PROPERTY(PropertyInfo(Variant::POOL_INT_ARRAY, "chars", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_chars", "_get_chars");
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ADD_PROPERTY(PropertyInfo(Variant::POOL_INT_ARRAY, "kernings", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_kernings", "_get_kernings");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "height", PROPERTY_HINT_RANGE, "-1024,1024,1"), "set_height", "get_height");
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "ascent", PROPERTY_HINT_RANGE, "-1024,1024,1"), "set_ascent", "get_ascent");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "distance_field"), "set_distance_field_hint", "is_distance_field_hint");
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "fallback", PROPERTY_HINT_RESOURCE_TYPE, "BitmapFont"), "set_fallback", "get_fallback");
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}
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BitmapFont::BitmapFont() {
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clear();
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}
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BitmapFont::~BitmapFont() {
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clear();
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}
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