Drop Id tags and copyright notices from files

[libs/gl.git] / source / vertexformat.cpp

diff --git a/source/vertexformat.cpp b/source/vertexformat.cpp
index dc8ff23eeaa2a7b52f194ef72c94a11c705d5f77..f5e175714187a9eb5a853abc9ba84aa3728864a9 100644 (file)
--- a/source/vertexformat.cpp
+++ b/source/vertexformat.cpp
@@ -1,12 +1,6 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2010  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"
 
@@ -63,6 +57,30 @@ 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 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;
@@ -101,76 +119,61 @@ VertexFormat operator,(const VertexFormat &f, unsigned i)
        return r;
 }
 
-istream &operator>>(istream &in, VertexFormat &f)
+void operator>>(const LexicalConverter &conv, VertexComponent &c)
 {
-       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')
        {
-               string::size_type 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"))
+               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 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(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==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