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 "renderbuffer.h"
   5
   6 namespace Msp {
   7 namespace GL {
   8
   9 Renderbuffer::Renderbuffer()
  10 {
  11         static Require _req(EXT_framebuffer_object);
  12
  13         if(ARB_direct_state_access)
  14                 glCreateRenderbuffers(1, &id);
  15         else
  16                 glGenRenderbuffers(1, &id);
  17 }
  18
  19 Renderbuffer::~Renderbuffer()
  20 {
  21         glDeleteRenderbuffers(1, &id);
  22 }
  23
  24 PixelFormat Renderbuffer::normalize_format(PixelFormat fmt)
  25 {
  26         if(!get_component_size(fmt) && MSP_sized_internal_formats)
  27         {
  28                 unsigned size = (fmt==DEPTH_COMPONENT ? get_gl_api()==OPENGL_ES2 ? 2 : 4 : 1);
  29                 return get_sized_pixelformat(fmt, size);
  30         }
  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 void Renderbuffer::storage_multisample(unsigned samples, PixelFormat fmt, unsigned wd, unsigned ht)
  51 {
  52         static Require _req(EXT_framebuffer_multisample);
  53         fmt = normalize_format(fmt);
  54         require_pixelformat(fmt);
  55
  56         width = wd;
  57         height = ht;
  58         if(ARB_direct_state_access)
  59                 glNamedRenderbufferStorageMultisample(id, samples, fmt, width, height);
  60         else
  61         {
  62                 BindRestore _bind(this);
  63                 glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, fmt, width, height);
  64         }
  65 }
  66
  67 void Renderbuffer::bind() const
  68 {
  69         if(set_current(this))
  70                 glBindRenderbuffer(GL_RENDERBUFFER, id);
  71 }
  72
  73 void Renderbuffer::unbind()
  74 {
  75         if(set_current(0))
  76                 glBindRenderbuffer(GL_RENDERBUFFER, 0);
  77 }
  78
  79 } // namespace GL
  80 } // namespace Msp