source/uniformblock.cpp

   1 #include <stdexcept>
   2 #include "buffer.h"
   3 #include "color.h"
   4 #include "error.h"
   5 #include "matrix.h"
   6 #include "uniform.h"
   7 #include "uniformblock.h"
   8 #include "vector.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 UniformBlock::UniformBlock()
  16 { }
  17
  18 UniformBlock::UniformBlock(unsigned s):
  19         size(s),
  20         data(size)
  21 { }
  22
  23 void UniformBlock::attach(int index, const Uniform &uni)
  24 {
  25         uniforms[index] = &uni;
  26 }
  27
  28 void UniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  29 {
  30         uniforms[info.location] = &uni;
  31         if(buffer)
  32         {
  33                 uni.store(info, &data[info.location]);
  34                 dirty = true;
  35         }
  36 }
  37
  38 void UniformBlock::apply(int index) const
  39 {
  40         if((index>=0) != (buffer!=0))
  41                 throw invalid_operation("UniformBlock::apply");
  42
  43         if(buffer)
  44         {
  45                 if(dirty)
  46                 {
  47                         update_buffer_data();
  48                         if(!buf_range)
  49                                 buf_range = new BufferRange(*buffer, buffer_offset, size);
  50                 }
  51                 buf_range->bind_to(UNIFORM_BUFFER, index);
  52         }
  53         else
  54         {
  55                 for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
  56                         i->second->apply(i->first);
  57         }
  58 }
  59
  60 } // namespace GL
  61 } // namespace Msp