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 Program::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(int index) const
  42 {
  43         if(index>=0)
  44                 throw invalid_argument("DefaultUniformBlock::apply");
  45
  46         for(unsigned i=0; i<uniforms.size(); ++i)
  47                 if(uniforms[i])
  48                         uniforms[i]->apply(i);
  49 }
  50
  51
  52 BufferBackedUniformBlock::BufferBackedUniformBlock(unsigned s):
  53         size(s),
  54         data(size),
  55         buf_range(0)
  56 {
  57         static Require _req(ARB_shader_objects);
  58         static Require _req2(ARB_uniform_buffer_object);
  59
  60         if(!size)
  61                 throw invalid_argument("BufferBackedUniformBlock::BufferBackedUniformBlock");
  62 }
  63
  64 BufferBackedUniformBlock::~BufferBackedUniformBlock()
  65 {
  66         delete buf_range;
  67 }
  68
  69 unsigned BufferBackedUniformBlock::get_alignment() const
  70 {
  71         return Limits::get_global().uniform_buffer_alignment;
  72 }
  73
  74 void BufferBackedUniformBlock::location_changed(Buffer *buf, unsigned off, unsigned) const
  75 {
  76         delete buf_range;
  77         buf_range = buf->create_range(off, size);
  78 }
  79
  80 void BufferBackedUniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  81 {
  82         if(info.block->bind_point<0)
  83                 throw invalid_argument("BufferBackedUniformBlock::attach");
  84
  85         uni.store(info, &data[info.offset]);
  86         dirty = true;
  87 }
  88
  89 void BufferBackedUniformBlock::apply(int index) const
  90 {
  91         if(index<0)
  92                 throw invalid_argument("BufferBackedUniformBlock::apply");
  93         if(!get_buffer())
  94                 throw invalid_operation("UniformBlock::apply");
  95
  96         refresh();
  97         buf_range->bind_to(UNIFORM_BUFFER, index);
  98 }
  99
 100 } // namespace GL
 101 } // namespace Msp