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         buf_range(0)
  17 { }
  18
  19 UniformBlock::UniformBlock(unsigned s):
  20         size(s),
  21         data(size),
  22         buf_range(0)
  23 { }
  24
  25 void UniformBlock::attach(int index, const Uniform &uni)
  26 {
  27         uniforms[index] = &uni;
  28 }
  29
  30 void UniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  31 {
  32         uniforms[info.location] = &uni;
  33         if(buffer)
  34         {
  35                 uni.store(info, &data[info.location]);
  36                 dirty = true;
  37         }
  38 }
  39
  40 void UniformBlock::apply(int index) const
  41 {
  42         if((index>=0) != (buffer!=0))
  43                 throw invalid_operation("UniformBlock::apply");
  44
  45         if(buffer)
  46         {
  47                 if(dirty)
  48                 {
  49                         update_buffer_data();
  50                         if(!buf_range)
  51                                 buf_range = new BufferRange(*buffer, buffer_offset, size);
  52                 }
  53                 buf_range->bind_to(UNIFORM_BUFFER, index);
  54         }
  55         else
  56         {
  57                 for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
  58                         i->second->apply(i->first);
  59         }
  60 }
  61
  62 } // namespace GL
  63 } // namespace Msp