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virtualx-engine/scene/resources/font.cpp
Juan Linietsky 0b806ee0fc GODOT IS OPEN SOURCE
2014-02-09 22:10:30 -03:00

554 lines
14 KiB
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/*************************************************************************/
/* font.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 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::_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> Font::_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 Font::_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> Font::_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 Font::_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> Font::_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 Font::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 Font::set_height(float p_height) {
height=p_height;
}
float Font::get_height() const{
return height;
}
void Font::set_ascent(float p_ascent){
ascent=p_ascent;
}
float Font::get_ascent() const {
return ascent;
}
float Font::get_descent() const {
return height-ascent;
}
void Font::add_texture(const Ref<Texture>& p_texture) {
ERR_FAIL_COND( p_texture.is_null());
textures.push_back( p_texture );
}
int Font::get_texture_count() const {
return textures.size();
};
Ref<Texture> Font::get_texture(int p_idx) const {
ERR_FAIL_INDEX_V(p_idx, textures.size(), Ref<Texture>());
return textures[p_idx];
};
int Font::get_character_count() const {
return char_map.size();
};
Vector<CharType> Font::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;
};
Font::Character Font::get_character(CharType p_char) const {
if (!char_map.has(p_char)) {
ERR_FAIL_V(Character());
};
return char_map[p_char];
};
void Font::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 Font::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<Font::KerningPairKey> Font::get_kerning_pair_keys() const {
Vector<Font::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 Font::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 Font::clear() {
height=1;
ascent=0;
char_map.clear();
textures.clear();
kerning_map.clear();
}
Size2 Font::get_string_size(const String& p_string) const {
float w=0;
int l = p_string.length();
if (l==0)
return Size2(0,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,height);
}
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 {
Point2 pos=p_pos;
float ofs=0;
VisualServer *vs = VisualServer::get_singleton();
for (int i=0;i<p_text.length();i++) {
const Character * c = char_map.getptr(p_text[i]);
if (!c)
continue;
// if (p_clip_w>=0 && (ofs+c->rect.size.width)>(p_clip_w))
// break; //width exceeded
if (p_clip_w>=0 && (ofs+c->rect.size.width)>p_clip_w)
break; //clip
Point2 cpos=pos;
cpos.x+=ofs+c->h_align;
cpos.y-=ascent;
cpos.y+=c->v_align;
ERR_CONTINUE( c->texture_idx<-1 || c->texture_idx>=textures.size());
if (c->texture_idx!=-1)
textures[c->texture_idx]->draw_rect_region( p_canvas_item, Rect2( cpos, c->rect.size ), c->rect, p_modulate );
ofs+=get_char_size(p_text[i],p_text[i+1]).width;
}
}
float Font::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const {
const Character * c = char_map.getptr(p_char);
if (!c)
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;
}
void Font::_bind_methods() {
ObjectTypeDB::bind_method(_MD("set_height","px"),&Font::set_height);
ObjectTypeDB::bind_method(_MD("get_height"),&Font::get_height);
ObjectTypeDB::bind_method(_MD("set_ascent","px"),&Font::set_ascent);
ObjectTypeDB::bind_method(_MD("get_ascent"),&Font::get_ascent);
ObjectTypeDB::bind_method(_MD("get_descent"),&Font::get_descent);
ObjectTypeDB::bind_method(_MD("add_kerning_pair","char_a","char_b","kerning"),&Font::add_kerning_pair);
ObjectTypeDB::bind_method(_MD("get_kerning_pair"),&Font::get_kerning_pair);
ObjectTypeDB::bind_method(_MD("add_texture","texture:Texture"),&Font::add_texture);
ObjectTypeDB::bind_method(_MD("add_char","character","texture","rect","align","advance"),&Font::add_char,DEFVAL(Point2()),DEFVAL(-1));
ObjectTypeDB::bind_method(_MD("get_char_size","char","next"),&Font::get_char_size,DEFVAL(0));
ObjectTypeDB::bind_method(_MD("get_string_size","string"),&Font::get_string_size);
ObjectTypeDB::bind_method(_MD("clear"),&Font::clear);
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("draw_char","canvas_item","pos","char","next","modulate"),&Font::draw_char,DEFVAL(-1),DEFVAL(Color(1,1,1)));
ObjectTypeDB::bind_method(_MD("_set_chars"),&Font::_set_chars);
ObjectTypeDB::bind_method(_MD("_get_chars"),&Font::_get_chars);
ObjectTypeDB::bind_method(_MD("_set_kernings"),&Font::_set_kernings);
ObjectTypeDB::bind_method(_MD("_get_kernings"),&Font::_get_kernings);
ObjectTypeDB::bind_method(_MD("_set_textures"),&Font::_set_textures);
ObjectTypeDB::bind_method(_MD("_get_textures"),&Font::_get_textures);
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") );
}
Font::Font() {
clear();
}
Font::~Font() {
clear();
}
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