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 UniformBlock::~UniformBlock()
  26 {
  27         delete buf_range;
  28 }
  29
  30 unsigned UniformBlock::get_alignment() const
  31 {
  32         return BufferRange::get_uniform_buffer_alignment();
  33 }
  34
  35 void UniformBlock::offset_changed()
  36 {
  37         delete buf_range;
  38         buf_range = 0;
  39 }
  40
  41 void UniformBlock::upload_data() const
  42 {
  43         if(!buf_range)
  44                 buf_range = new BufferRange(*buffer, buffer_offset, size);
  45         buf_range->data(&data[0]);
  46 }
  47
  48 void UniformBlock::attach(int index, const Uniform &uni)
  49 {
  50         uniforms[index] = &uni;
  51 }
  52
  53 void UniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  54 {
  55         uniforms[info.location] = &uni;
  56         if(buffer)
  57         {
  58                 uni.store(info, &data[info.location]);
  59                 dirty = true;
  60         }
  61 }
  62
  63 void UniformBlock::apply(int index) const
  64 {
  65         if((index>=0) != (buffer!=0))
  66                 throw invalid_operation("UniformBlock::apply");
  67
  68         if(buffer)
  69         {
  70                 if(dirty)
  71                         update_buffer_data();
  72                 buf_range->bind_to(UNIFORM_BUFFER, index);
  73         }
  74         else
  75         {
  76                 for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
  77                         i->second->apply(i->first);
  78         }
  79 }
  80
  81 } // namespace GL
  82 } // namespace Msp