source/core/uniformblock.cpp

   1 #include <algorithm>
   2 #include "device.h"
   3 #include "uniformblock.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GL {
   9
  10 UniformBlock::UniformBlock(const ReflectData::UniformBlockInfo &info):
  11         UniformBlockBackend(info.bind_point>=0),
  12         data(info.data_size)
  13 { }
  14
  15 size_t UniformBlock::get_alignment() const
  16 {
  17         return Device::get_current().get_info().limits.uniform_buffer_alignment;
  18 }
  19
  20 void UniformBlock::store(const ReflectData::UniformInfo &info, size_t array_size, const void *value)
  21 {
  22         array_size = min(array_size, max<size_t>(info.array_size, 1U));
  23
  24         size_t store_offset;
  25         bool packed;
  26         if(info.block->bind_point==ReflectData::DEFAULT_BLOCK)
  27         {
  28                 if(info.location<0)
  29                         return;
  30
  31                 store_offset = info.location*16;
  32                 packed = true;
  33         }
  34         else
  35         {
  36                 store_offset = info.offset;
  37                 if(array_size!=1 && info.array_stride!=get_type_size(info.type))
  38                         packed = false;
  39                 else if(is_matrix(info.type))
  40                         packed = (info.matrix_stride==get_type_size(get_matrix_column_type(info.type)));
  41                 else
  42                         packed = true;
  43         }
  44
  45         char *store_ptr = data.data()+store_offset;
  46         const char *value_ptr = static_cast<const char *>(value);
  47         if(packed)
  48         {
  49                 size_t value_size = array_size*get_type_size(info.type);
  50                 check_store_range(store_offset, value_size);
  51                 copy(value_ptr, value_ptr+value_size, store_ptr);
  52         }
  53         else if(is_matrix(info.type))
  54         {
  55                 unsigned col_size = get_type_size(get_matrix_column_type(info.type));
  56                 unsigned cols = get_type_size(info.type)/col_size;
  57                 check_store_range(store_offset, (array_size-1)*info.array_stride+(cols-1)*info.matrix_stride+col_size);
  58                 for(unsigned i=0; i<array_size; ++i)
  59                 {
  60                         char *elem_ptr = store_ptr;
  61                         for(unsigned j=0; j<cols; ++j)
  62                         {
  63                                 copy(value_ptr, value_ptr+col_size, elem_ptr);
  64                                 value_ptr += col_size;
  65                                 elem_ptr += info.matrix_stride;
  66                         }
  67                         store_ptr += info.array_stride;
  68                 }
  69         }
  70         else
  71         {
  72                 unsigned elem_size = get_type_size(info.type);
  73                 check_store_range(store_offset, (array_size-1)*info.array_stride+elem_size);
  74                 for(unsigned i=0; i<array_size; ++i)
  75                 {
  76                         copy(value_ptr, value_ptr+elem_size, store_ptr);
  77                         value_ptr += elem_size;
  78                         store_ptr += info.array_stride;
  79                 }
  80         }
  81
  82         mark_dirty();
  83 }
  84
  85 void UniformBlock::check_store_range(size_t offs, size_t size)
  86 {
  87 #ifdef DEBUG
  88         if(offs>data.size() || offs+size>data.size())
  89                 throw out_of_range("UniformBlock::store");
  90 #endif
  91 }
  92
  93 } // namespace GL
  94 } // namespace Msp