-/* $Id$
-
-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():
+ data(0)
+{ }
+
+VertexFormat::VertexFormat(VertexComponent c):
+ data(new unsigned char[8])
{
- uint stride=0;
- for(uint fmt=f; fmt; fmt>>=4)
- stride+=(fmt&3)+1;
- return stride;
+ data[0] = 1;
+ data[1] = c;
}
-std::istream &operator>>(std::istream &in, VertexFormat &f)
+VertexFormat::VertexFormat(const VertexFormat &f):
+ data(0)
{
- std::string str;
- in>>str;
+ *this = f;
+}
- unsigned start=0;
- f=NODATA;
+VertexFormat &VertexFormat::operator=(const VertexFormat &f)
+{
+ delete[] data;
+ if(f.data)
+ {
+ data = new unsigned char[(f.data[0]&~7)+8];
+ copy(f.data, f.data+f.data[0]+1, data);
+ }
+ else
+ data = 0;
+
+ return *this;
+}
+
+VertexFormat::~VertexFormat()
+{
+ delete[] data;
+}
- while(1)
+VertexFormat VertexFormat::operator,(VertexComponent c) const
+{
+ VertexFormat r = *this;
+ if(r.data)
{
- unsigned underscore=str.find('_', start);
- 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
+ const unsigned char n = ++r.data[0];
+ if((n&7)==0)
{
- in.setstate(std::ios_base::failbit);
- break;
+ unsigned char *newdt = new unsigned char[n+8];
+ copy(r.data, r.data+n, newdt);
+ delete r.data;
+ r.data = newdt;
}
+ r.data[n] = c;
+ }
+ else
+ {
+ r.data = new unsigned char[8];
+ r.data[0] = 1;
+ r.data[1] = c;
+ }
+
+ return r;
+}
- if(underscore==std::string::npos)
- break;
- start=underscore+1;
+VertexFormat VertexFormat::operator,(unsigned i) const
+{
+ if(!data)
+ throw invalid_operation("VertexFormat::operator,");
+ VertexFormat r = *this;
+ unsigned char *c = r.data+r.data[0];
+ *c = make_indexed_component(static_cast<VertexComponent>(*c), i);
+
+ 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)
+ {
+ if(get_component_type(*i)==type)
+ {
+ if(get_component_size(*i)>=size)
+ return offs;
+ else
+ return -1;
+ }
+ else
+ offs += get_component_size(*i);
}
- return in;
+ 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);
+}
+
+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
projects / libs / gl.git / blobdiff