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():
  12         count(0),
  13         samples(1)
  14 { }
  15
  16 FrameFormat::FrameFormat(FrameAttachment fa):
  17         count(1),
  18         samples(1)
  19 {
  20         attachments[0] = fa;
  21 }
  22
  23 FrameFormat FrameFormat::operator,(FrameAttachment fa) const
  24 {
  25         if(count>=MAX_ATTACHMENTS)
  26                 throw invalid_operation("FrameFormat::operator,");
  27
  28         FrameFormat result = *this;
  29         result.attachments[result.count++] = fa;
  30
  31         return result;
  32 }
  33
  34 FrameFormat FrameFormat::operator,(PixelFormat pf) const
  35 {
  36         if(!count)
  37                 throw invalid_operation("FrameFormat::operator,");
  38
  39         FrameFormat r = *this;
  40         FrameAttachment &fa = r.attachments[r.count-1];
  41         fa = make_typed_attachment(fa, pf);
  42
  43         return r;
  44 }
  45
  46 FrameFormat FrameFormat::operator,(unsigned index) const
  47 {
  48         if(!count)
  49                 throw invalid_operation("FrameFormat::operator,");
  50
  51         FrameFormat r = *this;
  52         FrameAttachment &fa = r.attachments[r.count-1];
  53         fa = make_indexed_attachment(fa, index);
  54
  55         return r;
  56 }
  57
  58 FrameFormat &FrameFormat::set_samples(unsigned s)
  59 {
  60         samples = s;
  61         return *this;
  62 }
  63
  64 int FrameFormat::index(FrameAttachment fa) const
  65 {
  66         for(unsigned i=0; i<count; ++i)
  67                 if(get_attach_point(attachments[i])==get_attach_point(fa))
  68                         return i;
  69         return -1;
  70 }
  71
  72
  73 FrameAttachment make_typed_attachment(FrameAttachment fa, PixelFormat pf)
  74 {
  75         PixelComponents comp = get_components(pf);
  76         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
  77         {
  78                 if(comp!=DEPTH_COMPONENT)
  79                         throw invalid_argument("make_typed_attachment");
  80         }
  81         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
  82         {
  83                 if(comp!=STENCIL_INDEX)
  84                         throw invalid_argument("make_typed_attachment");
  85         }
  86         else
  87         {
  88                 if(comp!=RED && comp!=RG && comp!=RGB && comp!=RGBA)
  89                         throw invalid_argument("make_typed_attachment");
  90         }
  91
  92         DataType type = get_component_type(pf);
  93         return static_cast<FrameAttachment>((fa&0xFC00) | (is_float(type)*0x100) | get_type_size(type)<<4 | get_component_count(comp));
  94 }
  95
  96 FrameAttachment make_indexed_attachment(FrameAttachment fa, unsigned i)
  97 {
  98         if(get_attach_point(fa)==get_attach_point(COLOR_ATTACHMENT))
  99         {
 100                 if(i>61)
 101                         throw out_of_range("make_indexed_attachment");
 102                 return static_cast<FrameAttachment>(fa+(i<<10));
 103         }
 104         else
 105                 throw invalid_argument("make_indexed_attachment");
 106 }
 107
 108 PixelFormat get_attachment_pixelformat(FrameAttachment fa)
 109 {
 110         PixelComponents comp;
 111         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
 112                 comp = DEPTH_COMPONENT;
 113         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
 114                 comp = STENCIL_INDEX;
 115         else
 116                 comp = static_cast<PixelComponents>(fa&7);
 117
 118         DataType type;
 119         if(fa&0x100)
 120                 type = static_cast<DataType>((fa&0x70)>>4 | 0x300);
 121         else
 122                 type = static_cast<DataType>((fa&0x70)>>4);
 123
 124         return make_pixelformat(comp, type);
 125 }
 126
 127 } // namespace GL
 128 } // namespace Msp