X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcore%2Fvertexformat.cpp;fp=source%2Fcore%2Fvertexformat.cpp;h=6c2e2933ba0f06f7dc9c483321dc9b7fcf2a4138;hp=0000000000000000000000000000000000000000;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e

diff --git a/source/core/vertexformat.cpp b/source/core/vertexformat.cpp
new file mode 100644
index 00000000..6c2e2933
--- /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