-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2008 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#include "texenv.h"
#include "texunit.h"
namespace GL {
TexEnv::TexEnv():
- mode(MODULATE)
+ mode(MODULATE),
+ color(0, 0, 0, 0)
{ }
+const TexEnv &TexEnv::default_object()
+{
+ static TexEnv obj;
+ return obj;
+}
+
+void TexEnv::update_parameter(int mask) const
+{
+ if(TexUnit::current().get_texenv()!=this)
+ {
+ TexUnit *unit = TexUnit::find_unit(this);
+ if(!unit)
+ return;
+
+ unit->bind();
+ }
+
+ if(mask&MODE)
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode);
+ if(mask&COLOR)
+ glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, &color.r);
+}
+
void TexEnv::set_mode(TexEnvMode m)
{
mode = m;
- if(current()==this)
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode);
+ update_parameter(MODE);
}
void TexEnv::set_color(const Color &c)
{
color = c;
- if(current()==this)
- glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, &color.r);
+ update_parameter(COLOR);
}
-void TexEnv::bind() const
+void TexEnv::bind_to(unsigned i) const
{
- if(TexUnit::current().set_texenv(this))
+ TexUnit &unit = TexUnit::get_unit(i);
+ if(unit.set_texenv(this))
{
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode);
- glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, &color.r);
+ unit.bind();
+ update_parameter(-1);
}
}
-const TexEnv *TexEnv::current()
+const TexEnv *TexEnv::current(unsigned i)
{
- return TexUnit::current().get_texenv();
+ return TexUnit::get_unit(i).get_texenv();
}
-void TexEnv::unbind()
+void TexEnv::unbind_from(unsigned i)
{
- if(TexUnit::current().set_texenv(0))
- {
- Color black(0, 0, 0, 0);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, MODULATE);
- glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, &black.r);
- }
+ default_object().bind_to(i);
}
} // namespace GL