X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexturing.cpp;fp=source%2Ftexturing.cpp;h=69c2b3ca55cdae1ff6df19a9227b7d4ddbfa24bf;hb=abc16c5ab0fff0945d724febe9d5d3889fb8a6ce;hp=0000000000000000000000000000000000000000;hpb=6a4907898281b738111e0c6527cc46f8810dc123;p=libs%2Fgl.git

diff --git a/source/texturing.cpp b/source/texturing.cpp
new file mode 100644
index 00000000..69c2b3ca
--- /dev/null
+++ b/source/texturing.cpp
@@ -0,0 +1,105 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2010  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include "texenv.h"
+#include "texture.h"
+#include "texturing.h"
+#include "texunit.h"
+
+namespace Msp {
+namespace GL {
+
+Texturing::~Texturing()
+{
+	if(current()==this)
+		unbind();
+}
+
+void Texturing::attach(unsigned attch, const Texture &tex)
+{
+	set_attachment(attch, &tex, 0);
+}
+
+void Texturing::attach(unsigned attch, const Texture &tex, const TexEnv &env)
+{
+	set_attachment(attch, &tex, &env);
+}
+
+void Texturing::detach(unsigned attch)
+{
+	set_attachment(attch, 0, 0);
+}
+
+void Texturing::set_attachment(unsigned attch, const Texture *tex, const TexEnv *env)
+{
+	if(attch>=TexUnit::get_n_units())
+		throw InvalidParameterValue("Invalid texture attachment");
+
+	if(attachments.size()<=attch)
+		attachments.resize(attch+1);
+
+	attachments[attch].tex = tex;
+	attachments[attch].env = env;
+
+	if(current()==this)
+		bind_attachment(attch);
+}
+
+void Texturing::bind_attachment(unsigned i) const
+{
+	const Attachment &attch = attachments[i];
+	TexUnit::activate(i);
+	if(attch.tex)
+		attch.tex->bind();
+	else
+		Texture::unbind();
+	if(attch.env)
+		attch.env->bind();
+	else
+		TexEnv::unbind();
+}
+
+void Texturing::unbind_attachment(unsigned i)
+{
+	TexUnit::activate(i);
+	Texture::unbind();
+	TexEnv::unbind();
+}
+
+void Texturing::bind() const
+{
+	const Texturing *old = current();
+	if(set_current(this))
+	{
+		for(unsigned i=0; i<attachments.size(); ++i)
+			bind_attachment(i);
+		if(old)
+		{
+			for(unsigned i=attachments.size(); i<old->attachments.size(); ++i)
+				unbind_attachment(i);
+		}
+	}
+}
+
+void Texturing::unbind()
+{
+	const Texturing *old = current();
+	if(set_current(0))
+	{
+		for(unsigned i=old->attachments.size(); i--;)
+			unbind_attachment(i);
+	}
+}
+
+
+Texturing::Attachment::Attachment():
+	tex(0),
+	env(0)
+{ }
+
+} // namespace GL
+} // namespace Msp;