Rearrange soucre files into subdirectories

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

diff --git a/source/core/vertexformat.cpp b/source/core/vertexformat.cpp
new file mode 100644 (file)
index 0000000..6c2e293
--- /dev/null
+++ b/source/core/vertexformat.cpp
@@ -0,0 +1,141 @@
+#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 {
+
+VertexFormat::VertexFormat():
+       count(0)
+{ }
+
+VertexFormat::VertexFormat(VertexComponent c):
+       count(1)
+{
+       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;
+}
+
+VertexFormat VertexFormat::operator,(unsigned i) const
+{
+       if(!count)
+               throw invalid_operation("VertexFormat::operator,");
+
+       VertexFormat r = *this;
+       unsigned char *c = &r.components[r.count-1];
+       *c = make_indexed_component(static_cast<VertexComponent>(*c), i);
+
+       return r;
+}
+
+bool VertexFormat::operator==(const VertexFormat &other) const
+{
+       if(count!=other.count)
+               return false;
+       return equal(components, components+count, other.components);
+}
+
+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 -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
+} // namespace Msp