-/* $Id$
-
-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 "misc.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)
{
- 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;
+ bool result = (texenv!=env);
+ 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;
+}
- if(cur_unit!=&units[n] && (cur_unit || n))
+const TexGen *TexUnit::get_texgen(unsigned i)
+{
+ if(i>=4)
+ 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)
{
- static RequireVersion _ver(1, 3);
- glActiveTexture(GL_TEXTURE0+n);
+ if(ARB_vertex_shader)
+ count = get_i(GL_MAX_TEXTURE_IMAGE_UNITS);
+ else if(ARB_multitexture)
+ count = get_i(GL_MAX_TEXTURE_UNITS);
+ 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, TexUnit());
+ for(; i<units.size(); ++i)
+ units[i].index = i;
}
- cur_unit=&units[n];
return units[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