-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef MSP_GL_VERTEXFORMAT_H_
#define MSP_GL_VERTEXFORMAT_H_
-#include <istream>
-#include "types.h"
+#include <msp/strings/lexicalcast.h>
namespace Msp {
namespace GL {
+/** A single vertex component. Nvidia drivers have aliasing between the
+fixed-functions and generic vertex attributes, despite the standard not
+allowing it. We use the same attribute indices here to avoid problems. */
enum VertexComponent
{
- VERTEX2=1,
+ VERTEX2 = 1,
VERTEX3,
VERTEX4,
- NORMAL3=6,
- TEXCOORD1=8,
+ NORMAL3 = 10,
+ COLOR4_UBYTE = 12,
+ COLOR3_FLOAT = 14,
+ COLOR4_FLOAT,
+ TANGENT3 = 18,
+ BINORMAL3 = 22,
+ TEXCOORD1 = 32,
TEXCOORD2,
TEXCOORD3,
TEXCOORD4,
- COLOR4_UBYTE=12,
- COLOR3_FLOAT=14,
- COLOR4_FLOAT,
- ATTRIB1=16,
+ ATTRIB1 = 64,
ATTRIB2,
ATTRIB3,
ATTRIB4
};
-struct VertexFormat
+class VertexFormat
{
+private:
unsigned char *data;
+public:
VertexFormat();
VertexFormat(VertexComponent);
VertexFormat(const VertexFormat &);
VertexFormat &operator=(const VertexFormat &);
~VertexFormat();
+ VertexFormat operator,(VertexComponent c) const;
+ VertexFormat operator,(unsigned i) const;
+
bool empty() const { return !data || !data[0]; }
const unsigned char *begin() const { return data ? data+1 : 0; }
const unsigned char *end() const { return data ? data+1+data[0] : 0; }
+ unsigned stride() const;
+ int offset(VertexComponent) const;
};
-VertexFormat operator,(const VertexFormat &f, VertexComponent c);
inline VertexFormat operator,(VertexComponent c1, VertexComponent c2)
{ return (VertexFormat(c1), c2); }
-VertexFormat operator,(const VertexFormat &f, unsigned i);
inline VertexFormat operator,(VertexComponent c, unsigned i)
{ return (VertexFormat(c), i); }
-uint get_stride(const VertexFormat &);
-std::istream &operator>>(std::istream &, VertexFormat &);
+VertexComponent make_indexed_component(VertexComponent, unsigned);
+
+inline unsigned get_component_type(unsigned char c)
+{ return c>>2; }
+
+inline unsigned get_component_size(unsigned char c)
+{ return (c&3)+1; }
+
+inline unsigned get_stride(const VertexFormat &f)
+{ return f.stride(); }
+
+void operator>>(const LexicalConverter &, VertexComponent &);
} // namespace GL
} // namespace Msp