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         uniforms[info.location] = &uni;
  28 }
  29
  30 void DefaultUniformBlock::attach(int index, const Uniform &uni)
  31 {
  32         uniforms[index] = &uni;
  33 }
  34
  35 void DefaultUniformBlock::apply(int index) const
  36 {
  37         if(index>=0)
  38                 throw invalid_argument("DefaultUniformBlock::apply");
  39
  40         for(map<int, const Uniform *>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
  41                 i->second->apply(i->first);
  42 }
  43
  44
  45 BufferBackedUniformBlock::BufferBackedUniformBlock(unsigned s):
  46         size(s),
  47         data(size),
  48         buf_range(0)
  49 {
  50         static Require _req(ARB_shader_objects);
  51         static Require _req2(ARB_uniform_buffer_object);
  52
  53         if(!size)
  54                 throw invalid_argument("BufferBackedUniformBlock::BufferBackedUniformBlock");
  55 }
  56
  57 BufferBackedUniformBlock::~BufferBackedUniformBlock()
  58 {
  59         delete buf_range;
  60 }
  61
  62 unsigned BufferBackedUniformBlock::get_alignment() const
  63 {
  64         return BufferRange::get_uniform_buffer_alignment();
  65 }
  66
  67 void BufferBackedUniformBlock::location_changed(Buffer *buf, unsigned off, unsigned) const
  68 {
  69         delete buf_range;
  70         buf_range = buf->create_range(off, size);
  71 }
  72
  73 void BufferBackedUniformBlock::attach(const Program::UniformInfo &info, const Uniform &uni)
  74 {
  75         if(info.block->bind_point<0)
  76                 throw invalid_argument("BufferBackedUniformBlock::attach");
  77
  78         uni.store(info, &data[info.offset]);
  79         dirty = true;
  80 }
  81
  82 void BufferBackedUniformBlock::apply(int index) const
  83 {
  84         if(index<0)
  85                 throw invalid_argument("BufferBackedUniformBlock::apply");
  86         if(!get_buffer())
  87                 throw invalid_operation("UniformBlock::apply");
  88
  89         refresh();
  90         buf_range->bind_to(UNIFORM_BUFFER, index);
  91 }
  92
  93 } // namespace GL
  94 } // namespace Msp