X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexunit.cpp;h=1129a0365617816a58ee1f0ff884cbd2f1e0ef59;hb=126161d1d44ab9503bc747d24a07b7b9d15e527a;hp=1155fa96286be0ab199280e61ea909115545df30;hpb=b617c5d7b5283ad260a77f01e42e6170cabbc03d;p=libs%2Fgl.git

diff --git a/source/texunit.cpp b/source/texunit.cpp
index 1155fa96..1129a036 100644
--- a/source/texunit.cpp
+++ b/source/texunit.cpp
@@ -1,23 +1,22 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2008  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include "extension.h"
+#include <stdexcept>
+#include <msp/gl/extensions/arb_multitexture.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
 #include "gl.h"
 #include "texunit.h"
-#include "version_1_3.h"
 
 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)
@@ -34,17 +33,58 @@ bool TexUnit::set_texenv(const TexEnv *env)
 	return result;
 }
 
-TexUnit &TexUnit::activate(unsigned n)
+bool TexUnit::set_texgen(unsigned i, const TexGen *gen)
 {
-	if(units.size()<=n)
-		units.resize(n+1);
+	if(i>=4)
+		throw out_of_range("TexUnit::set_texgen");
+	bool result = (texgen[i]!=gen);
+	texgen[i] = gen;
+	return result;
+}
+
+const TexGen *TexUnit::get_texgen(unsigned i)
+{
+	if(i>=4)
+		throw out_of_range("TexUnit::get_texgen");
+	return texgen[i];
+}
 
-	if(cur_unit!=&units[n] && (cur_unit || n))
+void TexUnit::bind()
+{
+	if(cur_unit!=this && (cur_unit || index))
+		glActiveTexture(GL_TEXTURE0+index);
+	cur_unit = this;
+}
+
+unsigned TexUnit::get_n_units()
+{
+	static int count = -1;
+	if(count<0)
 	{
-		static RequireVersion _ver(1, 3);
-		glActiveTexture(GL_TEXTURE0+n);
+		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::get_unit(unsigned n)
+{
+	if(n>0)
+		static Require _req(ARB_multitexture);
+	if(n>=get_n_units())
+		throw out_of_range("TexUnit::get_unit");
+
+	if(units.size()<=n)
+	{
+		unsigned i = units.size();
+		units.resize(n+1);
+		for(; i<units.size(); ++i)
+			units[i].index = i;
 	}
-	cur_unit = &units[n];
 
 	return units[n];
 }
@@ -52,12 +92,25 @@ TexUnit &TexUnit::activate(unsigned n)
 TexUnit &TexUnit::current()
 {
 	if(!cur_unit)
-		return activate(0);
+		get_unit(0).bind();
 	return *cur_unit;
 }
 
-vector<TexUnit> TexUnit::units;
-TexUnit *TexUnit::cur_unit = 0;
+TexUnit *TexUnit::find_unit(const Texture *tex)
+{
+	for(vector<TexUnit>::iterator i=units.begin(); i!=units.end(); ++i)
+		if(i->texture==tex)
+			return &*i;
+	return 0;
+}
+
+TexUnit *TexUnit::find_unit(const TexEnv *env)
+{
+	for(vector<TexUnit>::iterator i=units.begin(); i!=units.end(); ++i)
+		if(i->texenv==env)
+			return &*i;
+	return 0;
+}
 
 } // namespace GL
 } // namespace Msp