X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexunit.cpp;h=b19e791727c0e9f6d006c7a51eb58d3b0d634ed2;hp=91a33ecc378d966644e11aaf90c11524ffbc1bd0;hb=6afbace895a7bbcf216ab8e48280ea0303ab5892;hpb=f098a871fc6dc7b61a5aca5581fa327e4124c036

diff --git a/source/texunit.cpp b/source/texunit.cpp
index 91a33ecc..b19e7917 100644
--- a/source/texunit.cpp
+++ b/source/texunit.cpp
@@ -1,13 +1,7 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#define GL_GLEXT_PROTOTYPES
-#include <GL/gl.h>
-#include <GL/glext.h>
+#include <stdexcept>
+#include "arb_multitexture.h"
+#include "arb_vertex_shader.h"
+#include "gl.h"
 #include "texunit.h"
 
 using namespace std;
@@ -15,24 +9,74 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
+vector<TexUnit> TexUnit::units;
+TexUnit *TexUnit::cur_unit = 0;
+
 TexUnit::TexUnit():
-	texture(0)
-{ }
+	texture(0),
+	texenv(0)
+{
+	fill(texgen, texgen+4, static_cast<const TexGen *>(0));
+}
 
 bool TexUnit::set_texture(const Texture *tex)
 {
-	bool result=(tex!=texture);
-	texture=tex;
+	bool result = (tex!=texture);
+	texture = tex;
 	return result;
 }
 
+bool TexUnit::set_texenv(const TexEnv *env)
+{
+	bool result = (texenv!=env);
+	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)
+	{
+		if(ARB_vertex_shader)
+			glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
+		else if(ARB_multitexture)
+			glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
+		else
+			count = 1;
+	}
+	return count;
+}
+
 TexUnit &TexUnit::activate(unsigned n)
 {
+	if(n>0)
+		static Require _req(ARB_multitexture);
+	if(n>=get_n_units())
+		throw out_of_range("TexUnit::activate");
+
 	if(units.size()<=n)
 		units.resize(n+1);
 
-	glActiveTextureARB(GL_TEXTURE0+n);
-	cur_unit=&units[n];
+	if(cur_unit!=&units[n] && (cur_unit || n))
+		glActiveTexture(GL_TEXTURE0+n);
+	cur_unit = &units[n];
 
 	return units[n];
 }
@@ -44,8 +88,5 @@ TexUnit &TexUnit::current()
 	return *cur_unit;
 }
 
-vector<TexUnit> TexUnit::units;
-TexUnit *TexUnit::cur_unit=0;
-
 } // namespace GL
 } // namespace Msp