X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fvertexformat.cpp;h=e3f8bf97a5c49e5fe245975d09308de0e57295c9;hb=b250a711295f5ba00114f11a5b1c855eebe08d26;hp=2b18178b26db4734bcc3e3f673abb32324a10779;hpb=f1cbab0dca940fd5db6d459f9e91661efe3d6052;p=libs%2Fgl.git

diff --git a/source/vertexformat.cpp b/source/vertexformat.cpp
index 2b18178b..e3f8bf97 100644
--- a/source/vertexformat.cpp
+++ b/source/vertexformat.cpp
@@ -1,14 +1,8 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2010  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <cstring>
+#include <msp/strings/format.h>
 #include <msp/strings/lexicalcast.h>
 #include <msp/strings/utils.h>
-#include "except.h"
+#include "error.h"
 #include "vertexformat.h"
 
 using namespace std;
@@ -64,6 +58,30 @@ unsigned VertexFormat::stride() const
 	return s;
 }
 
+int VertexFormat::offset(VertexComponent comp, unsigned index) const
+{
+	if((comp<TEXCOORD1 && index>0) || (comp<ATTRIB1 && index>=8) || index>=53)
+		throw out_of_range("VertexFormat::offset");
+
+	unsigned type = (comp>>2)+index;
+	unsigned size = comp&3;
+	unsigned offs = 0;
+	for(const unsigned char *i=begin(); i!=end(); ++i)
+	{
+		if(static_cast<unsigned>(*i>>2)==type)
+		{
+			if((*i&3)>=size)
+				return offs;
+			else
+				return -1;
+		}
+		else
+			offs += (*i&3)+1;
+	}
+
+	return -1;
+}
+
 VertexFormat operator,(const VertexFormat &f, VertexComponent c)
 {
 	VertexFormat r = f;
@@ -92,11 +110,11 @@ VertexFormat operator,(const VertexFormat &f, VertexComponent c)
 VertexFormat operator,(const VertexFormat &f, unsigned i)
 {
 	if(!f.data)
-		throw InvalidState("VertexFormat has no components");
+		throw invalid_operation("VertexFormat::operator,");
 	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");
+		throw invalid_argument("VertexFormat::operator,");
 	*c += i*4;
 
 	return r;
@@ -120,7 +138,7 @@ void operator>>(const LexicalConverter &conv, VertexComponent &c)
 		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");
+			throw lexical_error(format("conversion of '%s' to VertexComponent", str));
 	}
 	else if(str.size()>=9 && !str.compare(0, 6, "ATTRIB") && str[6]>='1' && str[6]<='4' && str[7]=='_')
 	{
@@ -129,14 +147,14 @@ void operator>>(const LexicalConverter &conv, VertexComponent &c)
 		{
 			n = lexical_cast<unsigned>(str.substr(8));
 		}
-		catch(const LexicalError &)
+		catch(const lexical_error &)
 		{
-			throw LexicalError("Invalid attribute in VertexComponent conversion");
+			throw lexical_error(format("conversion of '%s' to VertexComponent", str));
 		}
 		c = static_cast<VertexComponent>(ATTRIB1+(str[6]-'1')+n*4);
 	}
 	else
-		throw LexicalError("Invalid input in VertexComponent conversion");
+		throw lexical_error(format("conversion of '%s' to VertexComponent", str));
 }
 
 // XXX This will go away eventually