Add support for integer vertex attributes
[libs/gl.git] / source / core / vertexformat.cpp
index 5d0b078fe06f154b2821ab176a2bf9310132c253..7dcb7aba5472e9438671ef31da1036ef15276c8b 100644 (file)
@@ -97,6 +97,8 @@ VertexAttribute make_typed_attribute(VertexAttribute attr, DataType type)
 {
        if(is_matrix(type) || is_vector(type) || is_image(type))
                throw invalid_argument("make_typed_attribute");
+       if(is_integer_attribute(attr) && is_float(type))
+               throw invalid_argument("make_typed_attribute");
 
        return static_cast<VertexAttribute>((attr&0xFC0F) | (type&0x0F)<<4 | (type&0x300)>>1);
 }
@@ -140,9 +142,19 @@ bool convert_attribute(const string &str, const char *name, int min_size, int ma
        for(; *name; ++name, ++i)
                if(*i!=*name)
                        return false;
+
+       VertexAttribute result = base_attr;
+
+       if(i!=str.end() && *i=='_')
+       {
+               if(*(++i)++!='I')
+                       return false;
+               result = static_cast<VertexAttribute>(result|8);
+       }
+
        if(i==str.end() || *i<'0'+min_size || *i>'0'+max_size)
                return false;
-       VertexAttribute result = static_cast<VertexAttribute>(base_attr+(*i++-'0'-min_size));
+       result = static_cast<VertexAttribute>(result+(*i++-'0'-min_size));
 
        while(i!=str.end())
        {