Enhance the extension generator to support different APIs

[libs/gl.git] / source / texenv.cpp

diff --git a/source/texenv.cpp b/source/texenv.cpp
index 6e5cca7748f2f6b25fa8194f15af2543a7caaf0e..c8af55f85febad1b22c5560efb0c7f688fca405e 100644 (file)
--- a/source/texenv.cpp
+++ b/source/texenv.cpp
@@ -1,10 +1,3 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2008  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include "texenv.h"
 #include "texunit.h"
 
@@ -12,31 +5,72 @@ namespace Msp {
 namespace GL {
 
 TexEnv::TexEnv():
-       mode(MODULATE)
+       mode(MODULATE),
+       color(0, 0, 0, 0)
 { }
 
-void TexEnv::set_mode(TexEnvMode m)
+TexEnv::~TexEnv()
 {
-       mode=m;
+       if(this!=&default_object())
+       {
+               while(TexUnit *unit = TexUnit::find_unit(this))
+                       unbind_from(unit->get_index());
+       }
 }
 
-void TexEnv::set_color(const Color &c)
+const TexEnv &TexEnv::default_object()
 {
-       color=c;
+       static TexEnv obj;
+       return obj;
 }
 
-void TexEnv::bind()
+void TexEnv::update_parameter(int mask) const
 {
-       if(TexUnit::current().set_texenv(this))
+       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;
+       update_parameter(MODE);
+}
+
+void TexEnv::set_color(const Color &c)
+{
+       color = c;
+       update_parameter(COLOR);
+}
+
+void TexEnv::bind_to(unsigned i) const
+{
+       TexUnit &unit = TexUnit::get_unit(i);
+       if(unit.set_texenv(this))
+       {
+               unit.bind();
+               update_parameter(-1);
        }
 }
 
-void TexEnv::unbind()
+const TexEnv *TexEnv::current(unsigned i)
+{
+       return TexUnit::get_unit(i).get_texenv();
+}
+
+void TexEnv::unbind_from(unsigned i)
 {
-       TexUnit::current().set_texenv(0);
+       default_object().bind_to(i);
 }
 
 } // namespace GL