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 "error.h"
   7 #include "matrix.h"
   8 #include "uniform.h"
   9 #include "uniformblock.h"
  10 #include "vector.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace GL {
  16
  17 DefaultUniformBlock::DefaultUniformBlock()
  18 {
  19         static Require _req(ARB_shader_objects);
  20 }
  21
  22 void DefaultUniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  23 {
  24         if(info.block->bind_point>=0)
  25                 throw invalid_argument("DefaultUniformBlock::attach");
  26
  27         attach(info.location, uni);
  28 }
  29
  30 void DefaultUniformBlock::attach(int index, const Uniform &uni)
  31 {
  32         if(index<0)
  33                 return;
  34
  35         if(static_cast<unsigned>(index)>=uniforms.size())
  36                 uniforms.resize(index+1, 0);
  37         uniforms[index] = &uni;
  38 }
  39
  40 void DefaultUniformBlock::apply(int index) const
  41 {
  42         if(index>=0)
  43                 throw invalid_argument("DefaultUniformBlock::apply");
  44
  45         for(unsigned i=0; i<uniforms.size(); ++i)
  46                 if(uniforms[i])
  47                         uniforms[i]->apply(i);
  48 }
  49
  50
  51 BufferBackedUniformBlock::BufferBackedUniformBlock(unsigned s):
  52         size(s),
  53         data(size),
  54         buf_range(0)
  55 {
  56         static Require _req(ARB_shader_objects);
  57         static Require _req2(ARB_uniform_buffer_object);
  58
  59         if(!size)
  60                 throw invalid_argument("BufferBackedUniformBlock::BufferBackedUniformBlock");
  61 }
  62
  63 BufferBackedUniformBlock::~BufferBackedUniformBlock()
  64 {
  65         delete buf_range;
  66 }
  67
  68 unsigned BufferBackedUniformBlock::get_alignment() const
  69 {
  70         return BufferRange::get_uniform_buffer_alignment();
  71 }
  72
  73 void BufferBackedUniformBlock::location_changed(Buffer *buf, unsigned off, unsigned) const
  74 {
  75         delete buf_range;
  76         buf_range = buf->create_range(off, size);
  77 }
  78
  79 void BufferBackedUniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  80 {
  81         if(info.block->bind_point<0)
  82                 throw invalid_argument("BufferBackedUniformBlock::attach");
  83
  84         uni.store(info, &data[info.offset]);
  85         dirty = true;
  86 }
  87
  88 void BufferBackedUniformBlock::apply(int index) const
  89 {
  90         if(index<0)
  91                 throw invalid_argument("BufferBackedUniformBlock::apply");
  92         if(!get_buffer())
  93                 throw invalid_operation("UniformBlock::apply");
  94
  95         refresh();
  96         buf_range->bind_to(UNIFORM_BUFFER, index);
  97 }
  98
  99 } // namespace GL
 100 } // namespace Msp