source/texturing.cpp

   1 #include "texture.h"
   2 #include "texturing.h"
   3 #include "texunit.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GL {
   9
  10 bool Texturing::legacy_used = true;
  11
  12 Texturing::~Texturing()
  13 {
  14         if(current()==this)
  15                 unbind();
  16 }
  17
  18 void Texturing::attach(unsigned attch, const Texture &tex)
  19 {
  20         set_attachment(attch, &tex);
  21 }
  22
  23 void Texturing::detach(unsigned attch)
  24 {
  25         set_attachment(attch, 0);
  26 }
  27
  28 void Texturing::set_attachment(unsigned attch, const Texture *tex)
  29 {
  30         if(attch>=TexUnit::get_n_units())
  31                 throw out_of_range("Texturing::set_attachment");
  32
  33         if(attachments.size()<=attch)
  34                 attachments.resize(attch+1);
  35
  36         attachments[attch] = tex;
  37
  38         if(current()==this)
  39                 bind_attachment(attch, legacy_used);
  40 }
  41
  42 const Texture *Texturing::get_attached_texture(unsigned i) const
  43 {
  44         return i<attachments.size() ? attachments[i] : 0;
  45 }
  46
  47 void Texturing::bind_attachment(unsigned i, bool legacy) const
  48 {
  49         if(const Texture *tex = attachments[i])
  50                 tex->bind_to(i, legacy);
  51         else
  52                 Texture::unbind_from(i);
  53 }
  54
  55 void Texturing::unbind_attachment(unsigned i)
  56 {
  57         Texture::unbind_from(i);
  58 }
  59
  60 void Texturing::bind(bool legacy) const
  61 {
  62         const Texturing *old = current();
  63         if(set_current(this) || legacy!=legacy_used)
  64         {
  65                 legacy_used = legacy;
  66                 for(unsigned i=0; i<attachments.size(); ++i)
  67                         bind_attachment(i, legacy);
  68                 if(old)
  69                 {
  70                         for(unsigned i=attachments.size(); i<old->attachments.size(); ++i)
  71                                 unbind_attachment(i);
  72                 }
  73         }
  74 }
  75
  76 void Texturing::unbind()
  77 {
  78         const Texturing *old = current();
  79         if(set_current(0))
  80         {
  81                 for(unsigned i=old->attachments.size(); i--;)
  82                         unbind_attachment(i);
  83         }
  84 }
  85
  86 } // namespace GL
  87 } // namespace Msp;