+ offs += (*i&3)+1;
+ }
+
+ return -1;
+}
+
+VertexFormat operator,(const VertexFormat &f, VertexComponent c)
+{
+ VertexFormat r = f;
+ if(r.data)
+ {
+ const unsigned char n = ++r.data[0];
+ if((n&7)==7)
+ {
+ unsigned char *newdt = new unsigned char[n+9];
+ memcpy(newdt, r.data, n);
+ delete r.data;
+ r.data = newdt;
+ }
+ r.data[n] = c;
+ }
+ else
+ {
+ r.data = new unsigned char[8];
+ r.data[0] = 1;
+ r.data[1] = c;
+ }
+
+ return r;
+}
+
+VertexFormat operator,(const VertexFormat &f, unsigned i)
+{
+ if(!f.data)
+ throw InvalidState("VertexFormat has no components");
+ VertexFormat r = f;
+ unsigned char *c = r.data+r.data[0];
+ if((*c<TEXCOORD1 && i>0) || (*c<ATTRIB1 && i>=8) || i>=53)
+ throw InvalidParameterValue("Vertex component index out of range");
+ *c += i*4;
+
+ return r;
+}
+
+void operator>>(const LexicalConverter &conv, VertexComponent &c)
+{
+ const string &str = conv.get();
+ if(str.size()==7 && !str.compare(0, 6, "VERTEX") && str[6]>='2' && str[6]<='4')
+ c = static_cast<VertexComponent>(VERTEX2+(str[6]-'2'));
+ else if(str=="NORMAL3")
+ c = NORMAL3;
+ else if(str.size()==12 && !str.compare(0, 5, "COLOR") && str[5]>='3' && str[5]<='4' && !str.compare(6, 6, "_FLOAT"))
+ c = static_cast<VertexComponent>(COLOR3_FLOAT+(str[5]-'3'));
+ else if(str=="COLOR4_UBYTE")
+ c = COLOR4_UBYTE;
+ else if(str.size()>=9 && !str.compare(0, 8, "TEXCOORD") && str[8]>='1' && str[8]<='4')
+ {
+ if(str.size()==9)
+ c = static_cast<VertexComponent>(TEXCOORD1+(str[8]-'1'));
+ else if(str.size()==11 && str[9]=='_' && str[10]>='0' && str[10]<='7')
+ c = static_cast<VertexComponent>(TEXCOORD1+(str[8]-'1')+(str[10]-'0')*4);
+ else
+ throw LexicalError("Invalid texture unit in VertexComponent conversion");
+ }
+ else if(str.size()>=9 && !str.compare(0, 6, "ATTRIB") && str[6]>='1' && str[6]<='4' && str[7]=='_')
+ {
+ unsigned n;
+ try