source/core/uniformblock.cpp

   1 #include <stdexcept>
   2 #include <msp/gl/extensions/arb_shader_objects.h>
   3 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
   4 #include "buffer.h"
   5 #include "color.h"
   6 #include "deviceinfo.h"
   7 #include "error.h"
   8 #include "matrix.h"
   9 #include "uniform.h"
  10 #include "uniformblock.h"
  11 #include "vector.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 DefaultUniformBlock::DefaultUniformBlock()
  19 {
  20         static Require _req(ARB_shader_objects);
  21 }
  22
  23 void DefaultUniformBlock::attach(const ReflectData::UniformInfo &info, const Uniform &uni)
  24 {
  25         if(info.block->bind_point>=0)
  26                 throw invalid_argument("DefaultUniformBlock::attach");
  27
  28         attach(info.location, uni);
  29 }
  30
  31 void DefaultUniformBlock::attach(int index, const Uniform &uni)
  32 {
  33         if(index<0)
  34                 return;
  35
  36         if(static_cast<unsigned>(index)>=uniforms.size())
  37                 uniforms.resize(index+1, 0);
  38         uniforms[index] = &uni;
  39 }
  40
  41 void DefaultUniformBlock::apply() const
  42 {
  43         for(unsigned i=0; i<uniforms.size(); ++i)
  44                 if(uniforms[i])
  45                         uniforms[i]->apply(i);
  46 }
  47
  48
  49 BufferBackedUniformBlock::BufferBackedUniformBlock(unsigned s):
  50         size(s),
  51         data(size)
  52 {
  53         static Require _req(ARB_shader_objects);
  54         static Require _req2(ARB_uniform_buffer_object);
  55
  56         if(!size)
  57                 throw invalid_argument("BufferBackedUniformBlock::BufferBackedUniformBlock");
  58 }
  59
  60 unsigned BufferBackedUniformBlock::get_alignment() const
  61 {
  62         return Limits::get_global().uniform_buffer_alignment;
  63 }
  64
  65 void BufferBackedUniformBlock::attach(const ReflectData::UniformInfo &info, const Uniform &uni)
  66 {
  67         if(info.block->bind_point<0)
  68                 throw invalid_argument("BufferBackedUniformBlock::attach");
  69
  70         uni.store(info, &data[info.offset]);
  71         dirty = true;
  72 }
  73
  74 } // namespace GL
  75 } // namespace Msp