-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <algorithm>
+#include <msp/strings/format.h>
+#include <msp/strings/lexicalcast.h>
+#include <msp/strings/utils.h>
+#include "error.h"
#include "vertexformat.h"
+using namespace std;
+
namespace Msp {
namespace GL {
-uint get_stride(VertexFormat f)
+VertexFormat::VertexFormat():
+ count(0)
+{ }
+
+VertexFormat::VertexFormat(VertexComponent c):
+ count(1)
{
- uint stride=0;
- for(uint fmt=f; fmt; fmt>>=4)
- stride+=(fmt&3)+1;
- return stride*sizeof(float);
+ components[0] = c;
+}
+
+VertexFormat VertexFormat::operator,(VertexComponent c) const
+{
+ if(count>=MAX_COMPONENTS)
+ throw invalid_operation("VertexFormat::operator,");
+
+ VertexFormat r = *this;
+ r.components[r.count++] = c;
+
+ return r;
}
-std::istream &operator>>(std::istream &in, VertexFormat &f)
+VertexFormat VertexFormat::operator,(unsigned i) const
{
- std::string str;
- in>>str;
+ if(!count)
+ throw invalid_operation("VertexFormat::operator,");
- unsigned start=0;
- unsigned comma;
- f=NODATA;
+ VertexFormat r = *this;
+ unsigned char *c = &r.components[r.count-1];
+ *c = make_indexed_component(static_cast<VertexComponent>(*c), i);
- while(1)
+ return r;
+}
+
+unsigned VertexFormat::stride() const
+{
+ unsigned s = 0;
+ for(const unsigned char *i=begin(); i!=end(); ++i)
+ s += get_component_size(*i);
+ return s;
+}
+
+int VertexFormat::offset(VertexComponent comp) const
+{
+ unsigned type = get_component_type(comp);
+ unsigned size = get_component_size(comp);
+ unsigned offs = 0;
+ for(const unsigned char *i=begin(); i!=end(); ++i)
{
- comma=str.find(',', start);
- if(str.compare(start, comma-start, "VERTEX2"))
- f=f,VERTEX2;
- else if(str.compare(start, comma-start, "VERTEX3"))
- f=f,VERTEX3;
- else if(str.compare(start, comma-start, "VERTEX4"))
- f=f,VERTEX4;
- else if(str.compare(start, comma-start, "NORMAL3"))
- f=f,NORMAL3;
- else if(str.compare(start, comma-start, "TEXCOORD1"))
- f=f,TEXCOORD1;
- else if(str.compare(start, comma-start, "TEXCOORD2"))
- f=f,TEXCOORD2;
- else if(str.compare(start, comma-start, "TEXCOORD3"))
- f=f,TEXCOORD3;
- else if(str.compare(start, comma-start, "TEXCOORD4"))
- f=f,TEXCOORD4;
- else if(str.compare(start, comma-start, "COLOR4_UBYTE"))
- f=f,COLOR4_UBYTE;
- else if(str.compare(start, comma-start, "COLOR3_FLOAT"))
- f=f,COLOR3_FLOAT;
- else if(str.compare(start, comma-start, "COLOR4_FLOAT"))
- f=f,COLOR4_FLOAT;
- else
+ if(get_component_type(*i)==type)
{
- in.setstate(std::ios_base::failbit);
- break;
+ if(get_component_size(*i)>=size)
+ return offs;
+ else
+ return -1;
}
- start=comma+1;
- if(comma==std::string::npos)
- break;
+ else
+ offs += get_component_size(*i);
+ }
+
+ return -1;
+}
+
+VertexComponent make_indexed_component(VertexComponent comp, unsigned index)
+{
+ if(comp>=TEXCOORD1 && comp<=TEXCOORD4)
+ {
+ if(index>=4)
+ throw out_of_range("make_indexed_component");
}
+ else if(comp>=ATTRIB1 && comp<=ATTRIB4)
+ {
+ if(index>=24)
+ throw out_of_range("make_indexed_component");
+ }
+ else
+ throw invalid_argument("make_indexed_component");
+ return static_cast<VertexComponent>(comp+index*4);
+}
- return in;
+void operator>>(const LexicalConverter &conv, VertexComponent &c)
+{
+ 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=="TANGENT3")
+ c = TANGENT3;
+ else if(str=="BINORMAL3")
+ c = BINORMAL3;
+ 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 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]=='_')
+ {
+ unsigned n;
+ try
+ {
+ n = lexical_cast<unsigned>(str.substr(8));
+ }
+ catch(const lexical_error &)
+ {
+ throw lexical_error(format("conversion of '%s' to VertexComponent", str));
+ }
+ c = static_cast<VertexComponent>(ATTRIB1+(str[6]-'1')+n*4);
+ }
+ else
+ throw lexical_error(format("conversion of '%s' to VertexComponent", str));
}
} // namespace GL