source/renderbuffer.cpp

   1 #include <msp/gl/extensions/arb_direct_state_access.h>
   2 #include <msp/gl/extensions/ext_framebuffer_multisample.h>
   3 #include <msp/gl/extensions/ext_framebuffer_object.h>
   4 #include "misc.h"
   5 #include "renderbuffer.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 Renderbuffer::Renderbuffer()
  13 {
  14         static Require _req(EXT_framebuffer_object);
  15
  16         if(ARB_direct_state_access)
  17                 glCreateRenderbuffers(1, &id);
  18         else
  19                 glGenRenderbuffers(1, &id);
  20 }
  21
  22 Renderbuffer::~Renderbuffer()
  23 {
  24         glDeleteRenderbuffers(1, &id);
  25 }
  26
  27 PixelFormat Renderbuffer::normalize_format(PixelFormat fmt)
  28 {
  29         if(!get_component_size(fmt) && OES_required_internalformat)
  30                 return get_default_sized_pixelformat(fmt);
  31
  32         return fmt;
  33 }
  34
  35 void Renderbuffer::storage(PixelFormat fmt, unsigned wd, unsigned ht)
  36 {
  37         fmt = normalize_format(fmt);
  38         require_pixelformat(fmt);
  39         width = wd;
  40         height = ht;
  41         if(ARB_direct_state_access)
  42                 glNamedRenderbufferStorage(id, fmt, width, height);
  43         else
  44         {
  45                 BindRestore _bind(this);
  46                 glRenderbufferStorage(GL_RENDERBUFFER, fmt, width, height);
  47         }
  48 }
  49
  50 unsigned Renderbuffer::get_max_samples()
  51 {
  52         static unsigned max_samples = (EXT_framebuffer_multisample ? get_i(GL_MAX_SAMPLES) : 0);
  53         return max_samples;
  54 }
  55
  56 void Renderbuffer::storage_multisample(unsigned samples, PixelFormat fmt, unsigned wd, unsigned ht)
  57 {
  58         if(!samples)
  59                 return storage(fmt, wd, ht);
  60
  61         static Require _req(EXT_framebuffer_multisample);
  62         if(samples>get_max_samples())
  63                 throw out_of_range("Renderbuffer::storage_multisample");
  64
  65         fmt = normalize_format(fmt);
  66         require_pixelformat(fmt);
  67
  68         width = wd;
  69         height = ht;
  70         if(ARB_direct_state_access)
  71                 glNamedRenderbufferStorageMultisample(id, samples, fmt, width, height);
  72         else
  73         {
  74                 BindRestore _bind(this);
  75                 glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, fmt, width, height);
  76         }
  77 }
  78
  79 void Renderbuffer::bind() const
  80 {
  81         if(set_current(this))
  82                 glBindRenderbuffer(GL_RENDERBUFFER, id);
  83 }
  84
  85 void Renderbuffer::unbind()
  86 {
  87         if(set_current(0))
  88                 glBindRenderbuffer(GL_RENDERBUFFER, 0);
  89 }
  90
  91 } // namespace GL
  92 } // namespace Msp