source/tests.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007, 2010  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "tests.h"
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 AlphaTest::AlphaTest():
  14         pred(ALWAYS),
  15         ref(0)
  16 { }
  17
  18 AlphaTest::AlphaTest(Predicate p, float r):
  19         pred(p),
  20         ref(r)
  21 { }
  22
  23 void AlphaTest::bind() const
  24 {
  25         if(set_current(this))
  26         {
  27                 glEnable(GL_ALPHA_TEST);
  28                 glAlphaFunc(pred, ref);
  29         }
  30 }
  31
  32 void AlphaTest::unbind()
  33 {
  34         if(set_current(0))
  35                 glDisable(GL_ALPHA_TEST);
  36 }
  37
  38 void alpha_func(Predicate func, float ref)
  39 {
  40         glAlphaFunc(func, ref);
  41 }
  42
  43
  44 DepthTest::DepthTest():
  45         write(true),
  46         pred(LESS)
  47 { }
  48
  49 DepthTest::DepthTest(Predicate p, bool w):
  50         write(w),
  51         pred(p)
  52 { }
  53
  54 void DepthTest::bind() const
  55 {
  56         if(set_current(this))
  57         {
  58                 glEnable(GL_DEPTH_TEST);
  59                 glDepthFunc(pred);
  60                 glDepthMask(write);
  61         }
  62 }
  63
  64 const DepthTest &DepthTest::lequal()
  65 {
  66         static DepthTest test(LEQUAL);
  67         return test;
  68 }
  69
  70 void DepthTest::unbind()
  71 {
  72         if(set_current(0))
  73         {
  74                 glDisable(GL_DEPTH_TEST);
  75                 // Allow glClear(GL_DEPTH_BUFFER_BIT) to work
  76                 glDepthMask(true);
  77         }
  78 }
  79
  80 void depth_func(Predicate func)
  81 {
  82         glDepthFunc(func);
  83 }
  84
  85
  86 ScissorTest::ScissorTest():
  87         left(0),
  88         bottom(0),
  89         width(1),
  90         height(1)
  91 { }
  92
  93 ScissorTest::ScissorTest(int l, int b, unsigned w, unsigned h):
  94         left(l),
  95         bottom(b),
  96         width(w),
  97         height(h)
  98 { }
  99
 100 void ScissorTest::bind() const
 101 {
 102         if(set_current(this))
 103         {
 104                 glEnable(GL_SCISSOR_TEST);
 105                 glScissor(left, bottom, width, height);
 106         }
 107 }
 108
 109 void ScissorTest::unbind()
 110 {
 111         if(set_current(0))
 112                 glDisable(GL_SCISSOR_TEST);
 113 }
 114
 115 void scissor(int left, int bottom, unsigned width, unsigned height)
 116 {
 117         glScissor(left, bottom, width, height);
 118 }
 119
 120 } // namespace GL
 121 } // namespace Msp