X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture.cpp;h=1cb169450fbde2bdb090fa2adadcf562a4148f02;hb=5c59a04e253bf7868796fc0dc8e9768ad1988b33;hp=d12e18e0fa4766efd60bf46ff594376f7796b546;hpb=7adcad3b40a03000a82e32db4523761c218309b8;p=libs%2Fgl.git

diff --git a/source/texture.cpp b/source/texture.cpp
index d12e18e0..1cb16945 100644
--- a/source/texture.cpp
+++ b/source/texture.cpp
@@ -1,61 +1,59 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include "except.h"
 #include "texture.h"
+#include "texunit.h"
 
 namespace Msp {
 namespace GL {
 
 void Texture::bind() const
 {
-	if(!target) return;
-
-	glEnable(target);
+	if(!target)
+		throw InvalidState("Attempt to bind a texture without target");
+
+	const Texture *cur=TexUnit::current().get_texture();
+	if(cur && cur->target!=target)
+		glDisable(cur->target);
+	if(!cur || cur->target!=target)
+		glEnable(target);
 	glBindTexture(target, id);
-	bound=this;
+	TexUnit::current().set_texture(this);
 }
 
 void Texture::parameter(GLenum param, int value)
 {
-	if(bound!=this) bind();
+	maybe_bind();
 
 	glTexParameteri(target, param, value);
 }
 
 void Texture::parameter(GLenum param, float value)
 {
-	if(bound!=this) bind();
+	maybe_bind();
 
 	glTexParameterf(target, param, value);
 }
 
-sizei Texture::get_width(int level) const
-{
-	if(bound!=this) bind();
-
-	int width;
-	glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
-	return width;
-}
-
-sizei Texture::get_height(int level) const
+Texture::~Texture()
 {
-	if(bound!=this) bind();
-
-	int height;
-	glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
-	return height;
+	glDeleteTextures(1, &id);
 }
 
-sizei Texture::get_depth(int level) const
+void Texture::unbind()
 {
-	if(bound!=this) bind();
-
-	int depth;
-	glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
-	return depth;
-}
+	const Texture *cur=TexUnit::current().get_texture();
+	if(!cur)
+		return;
 
-Texture::~Texture()
-{
-	glDeleteTextures(1, &id);
+	glBindTexture(cur->target, 0);
+	glDisable(cur->target);
+	TexUnit::current().set_texture(0);
 }
 
 Texture::Texture():
@@ -64,7 +62,11 @@ Texture::Texture():
 	glGenTextures(1, &id);
 }
 
-const Texture *Texture::bound=0;
+void Texture::maybe_bind() const
+{
+	if(TexUnit::current().get_texture()!=this)
+		bind();
+}
 
 } // namespace GL
 } // namespace Msp