X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexunit.cpp;h=1129a0365617816a58ee1f0ff884cbd2f1e0ef59;hb=126161d1d44ab9503bc747d24a07b7b9d15e527a;hp=7eb89a98c0515219dfd66d2a8448e622f2226dac;hpb=ccd59643144950604f95339683bac0ca4e8366d1;p=libs%2Fgl.git

diff --git a/source/texunit.cpp b/source/texunit.cpp
index 7eb89a98..1129a036 100644
--- a/source/texunit.cpp
+++ b/source/texunit.cpp
@@ -1,8 +1,8 @@
 #include <stdexcept>
-#include "extension.h"
+#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;
 
@@ -36,7 +36,7 @@ bool TexUnit::set_texenv(const TexEnv *env)
 bool TexUnit::set_texgen(unsigned i, const TexGen *gen)
 {
 	if(i>=4)
-		throw invalid_argument("TexUnit::set_texgen");
+		throw out_of_range("TexUnit::set_texgen");
 	bool result = (texgen[i]!=gen);
 	texgen[i] = gen;
 	return result;
@@ -45,18 +45,25 @@ bool TexUnit::set_texgen(unsigned i, const TexGen *gen)
 const TexGen *TexUnit::get_texgen(unsigned i)
 {
 	if(i>=4)
-		throw invalid_argument("TexUnit::get_texgen");
+		throw out_of_range("TexUnit::get_texgen");
 	return texgen[i];
 }
 
+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)
 	{
-		if(is_version_at_least(2, 0) || is_supported("GL_ARB_vertex_shader"))
+		if(ARB_vertex_shader)
 			glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
-		else if(is_version_at_least(1, 3))
+		else if(ARB_multitexture)
 			glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
 		else
 			count = 1;
@@ -64,17 +71,20 @@ unsigned TexUnit::get_n_units()
 	return count;
 }
 
-TexUnit &TexUnit::activate(unsigned n)
+TexUnit &TexUnit::get_unit(unsigned n)
 {
+	if(n>0)
+		static Require _req(ARB_multitexture);
 	if(n>=get_n_units())
-		throw out_of_range("TexUnit::activate");
+		throw out_of_range("TexUnit::get_unit");
 
 	if(units.size()<=n)
+	{
+		unsigned i = units.size();
 		units.resize(n+1);
-
-	if(cur_unit!=&units[n] && (cur_unit || n))
-		glActiveTexture(GL_TEXTURE0+n);
-	cur_unit = &units[n];
+		for(; i<units.size(); ++i)
+			units[i].index = i;
+	}
 
 	return units[n];
 }
@@ -82,9 +92,25 @@ TexUnit &TexUnit::activate(unsigned n)
 TexUnit &TexUnit::current()
 {
 	if(!cur_unit)
-		return activate(0);
+		get_unit(0).bind();
 	return *cur_unit;
 }
 
+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