+VertexFormat::VertexFormat():
+ data(0)
+{ }
+
+VertexFormat::VertexFormat(VertexComponent c):
+ data(new unsigned char[8])
+{
+ data[0]=1;
+ data[1]=c;
+}
+
+VertexFormat::VertexFormat(const VertexFormat &f):
+ data(0)
+{
+ if(f.data)
+ {
+ data=new unsigned char[f.data[0]/8+8];
+ memcpy(data, f.data, f.data[0]+1);
+ }
+}
+
+VertexFormat &VertexFormat::operator=(const VertexFormat &f)
+{
+ delete[] data;
+ if(f.data)
+ {
+ data=new unsigned char[f.data[0]/8+8];
+ memcpy(data, f.data, f.data[0]+1);
+ }
+ else
+ data=0;
+
+ return *this;
+}
+
+VertexFormat::~VertexFormat()
+{
+ delete[] data;
+}
+
+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<ATTRIB1)
+ throw InvalidState("Last component is not a generic attribute");
+ // VertexArray uses an unsigned to store flags for enabled arrays
+ if(i>=28)
+ throw InvalidParameterValue("Generic attribute index out of range");
+ *c+=i*4;
+
+ return r;
+}
+
+uint get_stride(const VertexFormat &f)