X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fvertexformat.cpp;h=f5e175714187a9eb5a853abc9ba84aa3728864a9;hp=91084bcc273e0bff6524746b22372a10d7b88eee;hb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8;hpb=bc3c82a86eeadde54be9fe32a8a8a76872ca99c3

diff --git a/source/vertexformat.cpp b/source/vertexformat.cpp
index 91084bcc..f5e17571 100644
--- a/source/vertexformat.cpp
+++ b/source/vertexformat.cpp
@@ -1,15 +1,11 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2009  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <cstring>
 #include <msp/strings/lexicalcast.h>
+#include <msp/strings/utils.h>
 #include "except.h"
 #include "vertexformat.h"
 
+using namespace std;
+
 namespace Msp {
 namespace GL {
 
@@ -20,8 +16,8 @@ VertexFormat::VertexFormat():
 VertexFormat::VertexFormat(VertexComponent c):
 	data(new unsigned char[8])
 {
-	data[0]=1;
-	data[1]=c;
+	data[0] = 1;
+	data[1] = c;
 }
 
 VertexFormat::VertexFormat(const VertexFormat &f):
@@ -29,7 +25,7 @@ VertexFormat::VertexFormat(const VertexFormat &f):
 {
 	if(f.data)
 	{
-		data=new unsigned char[f.data[0]/8+8];
+		data = new unsigned char[(f.data[0]&~7)+8];
 		memcpy(data, f.data, f.data[0]+1);
 	}
 }
@@ -39,11 +35,11 @@ VertexFormat &VertexFormat::operator=(const VertexFormat &f)
 	delete[] data;
 	if(f.data)
 	{
-		data=new unsigned char[f.data[0]/8+8];
+		data = new unsigned char[(f.data[0]&~7)+8];
 		memcpy(data, f.data, f.data[0]+1);
 	}
 	else
-		data=0;
+		data = 0;
 
 	return *this;
 }
@@ -53,26 +49,58 @@ VertexFormat::~VertexFormat()
 	delete[] data;
 }
 
+unsigned VertexFormat::stride() const
+{
+	unsigned s = 0;
+	for(const unsigned char *i=begin(); i!=end(); ++i)
+		s += (*i&3)+1;
+	return s;
+}
+
+int VertexFormat::offset(VertexComponent comp, unsigned index) const
+{
+	if((comp<TEXCOORD1 && index>0) || (comp<ATTRIB1 && index>=8) || index>=53)
+		throw InvalidParameterValue("Vertex component index out of range");
+
+	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;
+	VertexFormat r = f;
 	if(r.data)
 	{
-		const unsigned char n=++r.data[0];
+		const unsigned char n = ++r.data[0];
 		if((n&7)==7)
 		{
-			unsigned char *newdt=new unsigned char[n+9];
+			unsigned char *newdt = new unsigned char[n+9];
 			memcpy(newdt, r.data, n);
 			delete r.data;
-			r.data=newdt;
+			r.data = newdt;
 		}
-		r.data[n]=c;
+		r.data[n] = c;
 	}
 	else
 	{
-		r.data=new unsigned char[8];
-		r.data[0]=1;
-		r.data[1]=c;
+		r.data = new unsigned char[8];
+		r.data[0] = 1;
+		r.data[1] = c;
 	}
 
 	return r;
@@ -82,96 +110,70 @@ 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;
+	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;
 }
 
-uint get_stride(const VertexFormat &f)
+void operator>>(const LexicalConverter &conv, VertexComponent &c)
 {
-	uint stride=0;
-	for(const unsigned char *i=f.begin(); i!=f.end(); ++i)
-		stride+=(*i&3)+1;
-	return stride;
-}
-
-std::istream &operator>>(std::istream &in, VertexFormat &f)
-{
-	std::string str;
-	in>>str;
-
-	unsigned start=0;
-
-	while(1)
+	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 underscore=str.find('_', start);
-		bool fail=false;
-		if(!str.compare(start, underscore-start, "VERTEX2"))
-			f=(f,VERTEX2);
-		else if(!str.compare(start, underscore-start, "VERTEX3"))
-			f=(f,VERTEX3);
-		else if(!str.compare(start, underscore-start, "VERTEX4"))
-			f=(f,VERTEX4);
-		else if(!str.compare(start, underscore-start, "NORMAL3"))
-			f=(f,NORMAL3);
-		else if(!str.compare(start, underscore-start, "TEXCOORD1"))
-			f=(f,TEXCOORD1);
-		else if(!str.compare(start, underscore-start, "TEXCOORD2"))
-			f=(f,TEXCOORD2);
-		else if(!str.compare(start, underscore-start, "TEXCOORD3"))
-			f=(f,TEXCOORD3);
-		else if(!str.compare(start, underscore-start, "TEXCOORD4"))
-			f=(f,TEXCOORD4);
-		else if(!str.compare(start, underscore-start, "COLOR4UB"))
-			f=(f,COLOR4_UBYTE);
-		else if(!str.compare(start, underscore-start, "COLOR3F"))
-			f=(f,COLOR3_FLOAT);
-		else if(!str.compare(start, underscore-start, "COLOR4F"))
-			f=(f,COLOR4_FLOAT);
-		else if(underscore>=start+8 && !str.compare(start, 6, "ATTRIB"))
+		unsigned n;
+		try
 		{
-			try
-			{
-				char n=str[start+6];
-				unsigned i=lexical_cast<unsigned>(str.substr(start+7, underscore-start-7));
-				if(n=='1')
-					f=(f,ATTRIB1,i);
-				else if(n=='2')
-					f=(f,ATTRIB2,i);
-				else if(n=='3')
-					f=(f,ATTRIB3,i);
-				else if(n=='4')
-					f=(f,ATTRIB4,i);
-				else
-					fail=true;
-			}
-			catch(const LexicalError &)
-			{
-				fail=true;
-			}
+			n = lexical_cast<unsigned>(str.substr(8));
 		}
-		else
-			fail=true;
-
-		if(fail)
+		catch(const LexicalError &)
 		{
-			in.setstate(std::ios_base::failbit);
-			break;
+			throw LexicalError("Invalid attribute in VertexComponent conversion");
 		}
+		c = static_cast<VertexComponent>(ATTRIB1+(str[6]-'1')+n*4);
+	}
+	else
+		throw LexicalError("Invalid input in VertexComponent conversion");
+}
 
-		if(underscore==std::string::npos)
-			break;
-		start=underscore+1;
+// XXX This will go away eventually
+void operator>>(const LexicalConverter &conv, VertexFormat &f)
+{
+	vector<string> parts = split(conv.get(), '_');
+	for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
+	{
+		if(*i=="COLOR4UB")
+			*i = "COLOR4_UBYTE";
+		else if(i->size()==7 && !i->compare(0, 5, "COLOR") && (*i)[6]=='F')
+			*i = i->substr(0, 6)+"_FLOAT";
+		else if(i->size()>=10 && !i->compare(0, 8, "TEXCOORD"))
+			*i = i->substr(0, 9)+"_"+i->substr(9);
+		else if(i->size()>=8 && !i->compare(0, 6, "ATTRIB"))
+			*i = i->substr(0, 7)+"_"+i->substr(7);
 	}
 
-	return in;
+	for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
+		f = (f, lexical_cast<VertexComponent>(*i));
 }
 
 } // namespace GL