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