Add object-oriented interfaces for the various tests and blending

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

diff --git a/source/tests.cpp b/source/tests.cpp
index 5b34bf69d9d37fc732c4f45c5ea1c55a41394be1..a741b268a998dd31aa425f7df2f647a3095ab2b2 100644 (file)
--- a/source/tests.cpp
+++ b/source/tests.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007, 2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -10,9 +10,29 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
-void scissor(int left, int bottom, unsigned width, unsigned height)
+AlphaTest::AlphaTest():
+       pred(ALWAYS),
+       ref(0)
+{ }
+
+AlphaTest::AlphaTest(Predicate p, float r):
+       pred(p),
+       ref(r)
+{ }
+
+void AlphaTest::bind() const
 {
-       glScissor(left, bottom, width, height);
+       if(set_current(this))
+       {
+               glEnable(GL_ALPHA_TEST);
+               glAlphaFunc(pred, ref);
+       }
+}
+
+void AlphaTest::unbind()
+{
+       if(set_current(0))
+               glDisable(GL_ALPHA_TEST);
 }
 
 void alpha_func(Predicate func, float ref)
@@ -20,10 +40,78 @@ void alpha_func(Predicate func, float ref)
        glAlphaFunc(func, ref);
 }
 
+
+DepthTest::DepthTest():
+       write(true),
+       pred(LESS)
+{ }
+
+DepthTest::DepthTest(Predicate p, bool w):
+       write(w),
+       pred(p)
+{ }
+
+void DepthTest::bind() const
+{
+       if(set_current(this))
+       {
+               glEnable(GL_DEPTH_TEST);
+               glDepthFunc(pred);
+               glDepthMask(write);
+       }
+}
+
+const DepthTest &DepthTest::lequal()
+{
+       static DepthTest test(LEQUAL);
+       return test;
+}
+
+void DepthTest::unbind()
+{
+       if(set_current(0))
+               glDisable(GL_DEPTH_TEST);
+}
+
 void depth_func(Predicate func)
 {
        glDepthFunc(func);
 }
 
+
+ScissorTest::ScissorTest():
+       left(0),
+       bottom(0),
+       width(1),
+       height(1)
+{ }
+
+ScissorTest::ScissorTest(int l, int b, unsigned w, unsigned h):
+       left(l),
+       bottom(b),
+       width(w),
+       height(h)
+{ }
+
+void ScissorTest::bind() const
+{
+       if(set_current(this))
+       {
+               glEnable(GL_SCISSOR_TEST);
+               glScissor(left, bottom, width, height);
+       }
+}
+
+void ScissorTest::unbind()
+{
+       if(set_current(0))
+               glDisable(GL_SCISSOR_TEST);
+}
+
+void scissor(int left, int bottom, unsigned width, unsigned height)
+{
+       glScissor(left, bottom, width, height);
+}
+
 } // namespace GL
 } // namespace Msp