X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexunit.cpp;h=d581598a6c190e2caf46c59d11140d403c30e79b;hb=29f2d9da4ef0a0134c56bd2f8c7e6acac7773a61;hp=a542796548f0ae120bc9037b81bf0e2e3071c0fd;hpb=7e9e15a12fb398798f2719545cc8553354c1e389;p=libs%2Fgl.git

diff --git a/source/texunit.cpp b/source/texunit.cpp
index a5427965..d581598a 100644
--- a/source/texunit.cpp
+++ b/source/texunit.cpp
@@ -1,10 +1,4 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2008  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <stdexcept>
 #include "extension.h"
 #include "gl.h"
 #include "texunit.h"
@@ -21,7 +15,9 @@ TexUnit *TexUnit::cur_unit = 0;
 TexUnit::TexUnit():
 	texture(0),
 	texenv(0)
-{ }
+{
+	fill(texgen, texgen+4, static_cast<const TexGen *>(0));
+}
 
 bool TexUnit::set_texture(const Texture *tex)
 {
@@ -37,23 +33,41 @@ bool TexUnit::set_texenv(const TexEnv *env)
 	return result;
 }
 
+bool TexUnit::set_texgen(unsigned i, const TexGen *gen)
+{
+	if(i>=4)
+		throw invalid_argument("TexUnit::set_texgen");
+	bool result = (texgen[i]!=gen);
+	texgen[i] = gen;
+	return result;
+}
+
+const TexGen *TexUnit::get_texgen(unsigned i)
+{
+	if(i>=4)
+		throw invalid_argument("TexUnit::get_texgen");
+	return texgen[i];
+}
+
 unsigned TexUnit::get_n_units()
 {
 	static int count = -1;
 	if(count<0)
-		// XXX Should use GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS since GL 2.0
-		glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
+	{
+		if(is_version_at_least(2, 0) || is_supported("ARB_vertex_shader"))
+			glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
+		else if(is_version_at_least(1, 3))
+			glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
+		else
+			count = 1;
+	}
 	return count;
 }
 
 TexUnit &TexUnit::activate(unsigned n)
 {
-	if(n>0)
-	{
-		static RequireVersion _ver(1, 3);
-		if(n>=get_n_units())
-			throw InvalidParameterValue("Invalid texture unit number");
-	}
+	if(n>=get_n_units())
+		throw out_of_range("TexUnit::activate");
 
 	if(units.size()<=n)
 		units.resize(n+1);