source/core/texture2dmultisample.cpp

   1 #include <msp/gl/extensions/arb_direct_state_access.h>
   2 #include <msp/gl/extensions/arb_texture_multisample.h>
   3 #include <msp/gl/extensions/arb_texture_storage_multisample.h>
   4 #include "deviceinfo.h"
   5 #include "error.h"
   6 #include "texture2dmultisample.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 Texture2DMultisample::Texture2DMultisample():
  14         Texture(GL_TEXTURE_2D_MULTISAMPLE),
  15         width(0),
  16         height(0)
  17 {
  18         static Require _req(ARB_texture_multisample);
  19 }
  20
  21 void Texture2DMultisample::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned sm)
  22 {
  23         if(width>0)
  24         {
  25                 if(fmt!=format || wd!=width || ht!=height || sm!=samples)
  26                         throw incompatible_data("Texture2DMultisample::storage");
  27                 return;
  28         }
  29         if(wd==0 || ht==0)
  30                 throw invalid_argument("Texture2DMultisample::storage");
  31         if(!sm || sm>Limits::get_global().max_samples)
  32                 throw invalid_argument("Texture2DMultisample::storage");
  33
  34         set_format(fmt);
  35         width = wd;
  36         height = ht;
  37         samples = sm;
  38
  39         bool direct = ARB_texture_storage_multisample && ARB_direct_state_access;
  40         if(!direct)
  41         {
  42                 glActiveTexture(GL_TEXTURE0);
  43                 glBindTexture(target, id);
  44         }
  45
  46         GLenum gl_fmt = get_gl_pixelformat(storage_fmt);
  47         if(ARB_texture_storage_multisample)
  48         {
  49                 if(ARB_direct_state_access)
  50                         glTextureStorage2DMultisample(id, samples, gl_fmt, width, height, false);
  51                 else
  52                         glTexStorage2DMultisample(target, samples, gl_fmt, width, height, false);
  53         }
  54         else
  55                 glTexImage2DMultisample(target, samples, gl_fmt, width, height, false);
  56         apply_swizzle();
  57
  58         if(!direct)
  59                 glBindTexture(target, 0);
  60 }
  61
  62 void Texture2DMultisample::image(const Graphics::Image &, unsigned)
  63 {
  64         throw invalid_operation("Texture2DMultisample::image");
  65 }
  66
  67 UInt64 Texture2DMultisample::get_data_size() const
  68 {
  69         return id ? width*height*get_pixel_size(format)*samples : 0;
  70 }
  71
  72 } // namespace GL
  73 } // namespace Msp