source/core/frameformat.cpp

   1 #include "deviceinfo.h"
   2 #include "error.h"
   3 #include "frameformat.h"
   4 #include "gl.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace GL {
  10
  11 FrameFormat::FrameFormat(FrameAttachment fa):
  12         count(1),
  13         samples(1)
  14 {
  15         attachments[0] = fa;
  16 }
  17
  18 FrameFormat FrameFormat::operator,(FrameAttachment fa) const
  19 {
  20         if(count>=MAX_ATTACHMENTS)
  21                 throw invalid_operation("FrameFormat::operator,");
  22
  23         FrameFormat result = *this;
  24         result.attachments[result.count++] = fa;
  25
  26         return result;
  27 }
  28
  29 FrameFormat FrameFormat::operator,(PixelFormat pf) const
  30 {
  31         if(!count)
  32                 throw invalid_operation("FrameFormat::operator,");
  33
  34         FrameFormat r = *this;
  35         FrameAttachment &fa = r.attachments[r.count-1];
  36         fa = make_typed_attachment(fa, pf);
  37
  38         return r;
  39 }
  40
  41 FrameFormat FrameFormat::operator,(unsigned index) const
  42 {
  43         if(!count)
  44                 throw invalid_operation("FrameFormat::operator,");
  45
  46         FrameFormat r = *this;
  47         FrameAttachment &fa = r.attachments[r.count-1];
  48         fa = make_indexed_attachment(fa, index);
  49
  50         return r;
  51 }
  52
  53 FrameFormat &FrameFormat::set_samples(unsigned s)
  54 {
  55         samples = s;
  56         return *this;
  57 }
  58
  59 int FrameFormat::index(FrameAttachment fa) const
  60 {
  61         for(unsigned i=0; i<count; ++i)
  62                 if(get_attach_point(attachments[i])==get_attach_point(fa))
  63                         return i;
  64         return -1;
  65 }
  66
  67
  68 FrameAttachment make_typed_attachment(FrameAttachment fa, PixelFormat pf)
  69 {
  70         PixelComponents comp = get_components(pf);
  71         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
  72         {
  73                 if(comp!=DEPTH_COMPONENT)
  74                         throw invalid_argument("make_typed_attachment");
  75         }
  76         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
  77         {
  78                 if(comp!=STENCIL_INDEX)
  79                         throw invalid_argument("make_typed_attachment");
  80         }
  81         else
  82         {
  83                 if(comp!=RED && comp!=RG && comp!=RGB && comp!=RGBA)
  84                         throw invalid_argument("make_typed_attachment");
  85         }
  86
  87         DataType type = get_component_type(pf);
  88         return static_cast<FrameAttachment>((fa&0xFC00) | (is_float(type)*0x100) | get_type_size(type)<<4 | get_component_count(comp));
  89 }
  90
  91 FrameAttachment make_indexed_attachment(FrameAttachment fa, unsigned i)
  92 {
  93         if(get_attach_point(fa)==get_attach_point(COLOR_ATTACHMENT))
  94         {
  95                 if(i>61)
  96                         throw out_of_range("make_indexed_attachment");
  97                 return static_cast<FrameAttachment>(fa+(i<<10));
  98         }
  99         else
 100                 throw invalid_argument("make_indexed_attachment");
 101 }
 102
 103 PixelFormat get_attachment_pixelformat(FrameAttachment fa)
 104 {
 105         PixelComponents comp;
 106         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
 107                 comp = DEPTH_COMPONENT;
 108         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
 109                 comp = STENCIL_INDEX;
 110         else
 111                 comp = static_cast<PixelComponents>(fa&7);
 112
 113         DataType type;
 114         if(fa&0x100)
 115                 type = static_cast<DataType>((fa&0x70)>>4 | 0x300);
 116         else
 117                 type = static_cast<DataType>((fa&0x70)>>4);
 118
 119         return make_pixelformat(comp, type);
 120 }
 121
 122 } // namespace GL
 123 } // namespace Msp