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virtualx-engine/scene/resources/font.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

626 lines
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/*************************************************************************/
/* font.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* 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/os/file_access.h"
#include "core/io/resource_loader.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 {
float length=get_string_size(p_text).width;
if (length>=p_width) {
draw(p_canvas_item,p_pos,p_text,p_modulate,p_width);
return;
}
float ofs;
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;
}
draw(p_canvas_item,p_pos+Point2(ofs,0),p_text,p_modulate,p_width);
}
void Font::draw(RID p_canvas_item, const Point2& p_pos, const String& p_text, const Color& p_modulate,int p_clip_w) const {
Vector2 ofs;
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],p_modulate);
}
}
void Font::update_changes() {
emit_changed();
}
void Font::_bind_methods() {
ObjectTypeDB::bind_method(_MD("draw","canvas_item","pos","string","modulate","clip_w"),&Font::draw,DEFVAL(Color(1,1,1)),DEFVAL(-1));
ObjectTypeDB::bind_method(_MD("get_ascent"),&Font::get_ascent);
ObjectTypeDB::bind_method(_MD("get_descent"),&Font::get_descent);
ObjectTypeDB::bind_method(_MD("get_height"),&Font::get_height);
ObjectTypeDB::bind_method(_MD("is_distance_field_hint"),&Font::is_distance_field_hint);
ObjectTypeDB::bind_method(_MD("get_string_size","string"),&Font::get_string_size);
ObjectTypeDB::bind_method(_MD("draw_char","canvas_item","pos","char","next","modulate"),&Font::draw_char,DEFVAL(-1),DEFVAL(Color(1,1,1)));
ObjectTypeDB::bind_method(_MD("update_changes"),&Font::update_changes);
}
Font::Font() {
}
/////////////////////////////////////////////////////////////////
void BitmapFont::_set_chars(const DVector<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;
DVector<int>::Read r=p_chars.read();
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]);
}
}
DVector<int> BitmapFont::_get_chars() const {
DVector<int> chars;
const CharType* key=NULL;
while((key=char_map.next(key))) {
const Character *c=char_map.getptr(*key);
chars.push_back(*key);
chars.push_back(c->texture_idx);
chars.push_back(c->rect.pos.x);
chars.push_back(c->rect.pos.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 DVector<int>& p_kernings) {
int len=p_kernings.size();
ERR_FAIL_COND(len%3);
if (!len)
return;
DVector<int>::Read r=p_kernings.read();
for(int i=0;i<len/3;i++) {
const int* data = &r[i*3];
add_kerning_pair(data[0],data[1],data[2]);
}
}
DVector<int> BitmapFont::_get_kernings() const {
DVector<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) {
for(int i=0;i<p_textures.size();i++) {
Ref<Texture> 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].get_ref_ptr());
return rtextures;
}
Error BitmapFont::create_from_fnt(const String& p_string) {
//fnt format used by angelcode bmfont
//http://www.angelcode.com/products/bmfont/
FileAccess *f = FileAccess::open(p_string,FileAccess::READ);
if (!f) {
ERR_EXPLAIN("Can't open font: "+p_string);
ERR_FAIL_V(ERR_FILE_NOT_FOUND);
}
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 file = keys["file"];
file=p_string.get_base_dir()+"/"+file;
Ref<Texture> 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.pos.x=keys["x"].to_int();
if (keys.has("y"))
rect.pos.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<Texture>& p_texture) {
ERR_FAIL_COND( p_texture.is_null());
textures.push_back( p_texture );
}
int BitmapFont::get_texture_count() const {
return textures.size();
};
Ref<Texture> BitmapFont::get_texture(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, textures.size(), Ref<Texture>());
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[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[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());
}
void BitmapFont::set_fallback(const Ref<BitmapFont> &p_fallback) {
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) 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);
return 0;
}
Point2 cpos=p_pos;
cpos.x+=c->h_align;
cpos.y-=ascent;
cpos.y+=c->v_align;
ERR_FAIL_COND_V( c->texture_idx<-1 || c->texture_idx>=textures.size(),0);
if (c->texture_idx!=-1)
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 );
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() {
ObjectTypeDB::bind_method(_MD("create_from_fnt","path"),&BitmapFont::create_from_fnt);
ObjectTypeDB::bind_method(_MD("set_height","px"),&BitmapFont::set_height);
ObjectTypeDB::bind_method(_MD("set_ascent","px"),&BitmapFont::set_ascent);
ObjectTypeDB::bind_method(_MD("add_kerning_pair","char_a","char_b","kerning"),&BitmapFont::add_kerning_pair);
ObjectTypeDB::bind_method(_MD("get_kerning_pair","char_a","char_b"),&BitmapFont::get_kerning_pair);
ObjectTypeDB::bind_method(_MD("add_texture","texture:Texture"),&BitmapFont::add_texture);
ObjectTypeDB::bind_method(_MD("add_char","character","texture","rect","align","advance"),&BitmapFont::add_char,DEFVAL(Point2()),DEFVAL(-1));
ObjectTypeDB::bind_method(_MD("get_texture_count"),&BitmapFont::get_texture_count);
ObjectTypeDB::bind_method(_MD("get_texture:Texture","idx"),&BitmapFont::get_texture);
ObjectTypeDB::bind_method(_MD("get_char_size","char","next"),&BitmapFont::get_char_size,DEFVAL(0));
ObjectTypeDB::bind_method(_MD("set_distance_field_hint","enable"),&BitmapFont::set_distance_field_hint);
ObjectTypeDB::bind_method(_MD("clear"),&BitmapFont::clear);
ObjectTypeDB::bind_method(_MD("_set_chars"),&BitmapFont::_set_chars);
ObjectTypeDB::bind_method(_MD("_get_chars"),&BitmapFont::_get_chars);
ObjectTypeDB::bind_method(_MD("_set_kernings"),&BitmapFont::_set_kernings);
ObjectTypeDB::bind_method(_MD("_get_kernings"),&BitmapFont::_get_kernings);
ObjectTypeDB::bind_method(_MD("_set_textures"),&BitmapFont::_set_textures);
ObjectTypeDB::bind_method(_MD("_get_textures"),&BitmapFont::_get_textures);
ObjectTypeDB::bind_method(_MD("set_fallback","fallback"),&BitmapFont::set_fallback);
ObjectTypeDB::bind_method(_MD("get_fallback"),&BitmapFont::get_fallback);
ADD_PROPERTY( PropertyInfo( Variant::ARRAY, "textures", PROPERTY_HINT_NONE,"", PROPERTY_USAGE_NOEDITOR ), _SCS("_set_textures"), _SCS("_get_textures") );
ADD_PROPERTY( PropertyInfo( Variant::INT_ARRAY, "chars", PROPERTY_HINT_NONE,"", PROPERTY_USAGE_NOEDITOR ), _SCS("_set_chars"), _SCS("_get_chars") );
ADD_PROPERTY( PropertyInfo( Variant::INT_ARRAY, "kernings", PROPERTY_HINT_NONE,"", PROPERTY_USAGE_NOEDITOR ), _SCS("_set_kernings"), _SCS("_get_kernings") );
ADD_PROPERTY( PropertyInfo( Variant::REAL, "height", PROPERTY_HINT_RANGE,"-1024,1024,1" ), _SCS("set_height"), _SCS("get_height") );
ADD_PROPERTY( PropertyInfo( Variant::REAL, "ascent", PROPERTY_HINT_RANGE,"-1024,1024,1" ), _SCS("set_ascent"), _SCS("get_ascent") );
ADD_PROPERTY( PropertyInfo( Variant::BOOL, "distance_field" ), _SCS("set_distance_field_hint"), _SCS("is_distance_field_hint") );
ADD_PROPERTY( PropertyInfo( Variant::OBJECT, "fallback", PROPERTY_HINT_RESOURCE_TYPE,"BitmapFont" ), _SCS("set_fallback"), _SCS("get_fallback") );
}
BitmapFont::BitmapFont() {
clear();
}
BitmapFont::~BitmapFont() {
clear();
}
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