X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fvertexformat.h;h=3561292245fc640deb2859629cbf8f39c1776e5b;hp=833b942ee82f2097bd004228879a43957fcd615d;hb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;hpb=3d6188a7f48566398e7ad7548dbd47a68bc73bdc

diff --git a/source/vertexformat.h b/source/vertexformat.h
index 833b942e..35612922 100644
--- a/source/vertexformat.h
+++ b/source/vertexformat.h
@@ -1,60 +1,77 @@
 #ifndef MSP_GL_VERTEXFORMAT_H_
 #define MSP_GL_VERTEXFORMAT_H_
 
-#include <msp/core/lexicalcast.h>
+#include <msp/strings/lexicalcast.h>
 
 namespace Msp {
 namespace GL {
 
+/** A single vertex component.  Symbolic names are provided for commonly used
+attributes.  These are aliased with with generic attributes, so be careful when
+picking your attribute indices. */
 enum VertexComponent
 {
 	VERTEX2 = 1,
 	VERTEX3,
 	VERTEX4,
-	NORMAL3 = 6,
-	COLOR4_UBYTE = 8,
-	COLOR3_FLOAT = 10,
+	NORMAL3 = 10,
+	COLOR4_UBYTE = 12,
+	COLOR3_FLOAT = 14,
 	COLOR4_FLOAT,
-	TEXCOORD1 = 12,
+	TANGENT3 = 18,
+	BINORMAL3 = 22,
+	TEXCOORD1 = 32,
 	TEXCOORD2,
 	TEXCOORD3,
 	TEXCOORD4,
-	ATTRIB1 = 44,
+	ATTRIB1 = 64,
 	ATTRIB2,
 	ATTRIB3,
 	ATTRIB4
 };
 
-struct VertexFormat
+class VertexFormat
 {
-	unsigned char *data;
+private:
+	enum { MAX_COMPONENTS = 15 };
 
+	unsigned char count;
+	unsigned char components[MAX_COMPONENTS];
+
+public:
 	VertexFormat();
 	VertexFormat(VertexComponent);
-	VertexFormat(const VertexFormat &);
-	VertexFormat &operator=(const VertexFormat &);
-	~VertexFormat();
 
-	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; }
+	VertexFormat operator,(VertexComponent c) const;
+	VertexFormat operator,(unsigned i) const;
+	bool operator==(const VertexFormat &) const;
+	bool operator!=(const VertexFormat &other) const { return !(*this==other); }
+
+	bool empty() const { return !count; }
+	const unsigned char *begin() const { return components; }
+	const unsigned char *end() const { return components+count; }
 	unsigned stride() const;
-	int offset(VertexComponent, unsigned = 0) 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); }
 
+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 &);
-void operator>>(const LexicalConverter &, VertexFormat &);
 
 } // namespace GL
 } // namespace Msp