source/core/frameformat.cpp

   1 #include "deviceinfo.h"
   2 #include "error.h"
   3 #include "frameformat.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GL {
   9
  10 FrameFormat::FrameFormat():
  11         count(0),
  12         samples(1)
  13 { }
  14
  15 FrameFormat::FrameFormat(FrameAttachment fa):
  16         count(1),
  17         samples(1)
  18 {
  19         attachments[0] = fa;
  20 }
  21
  22 FrameFormat FrameFormat::operator,(FrameAttachment fa) const
  23 {
  24         if(count>=MAX_ATTACHMENTS)
  25                 throw invalid_operation("FrameFormat::operator,");
  26
  27         FrameFormat result = *this;
  28         result.attachments[result.count++] = fa;
  29
  30         return result;
  31 }
  32
  33 FrameFormat FrameFormat::operator,(PixelFormat pf) const
  34 {
  35         if(!count)
  36                 throw invalid_operation("FrameFormat::operator,");
  37
  38         FrameFormat r = *this;
  39         uint16_t &fa = r.attachments[r.count-1];
  40         fa = make_typed_attachment(static_cast<FrameAttachment>(fa), pf);
  41
  42         return r;
  43 }
  44
  45 FrameFormat FrameFormat::operator,(unsigned index) const
  46 {
  47         if(!count)
  48                 throw invalid_operation("FrameFormat::operator,");
  49
  50         FrameFormat r = *this;
  51         uint16_t &fa = r.attachments[r.count-1];
  52         fa = make_indexed_attachment(static_cast<FrameAttachment>(fa), index);
  53
  54         return r;
  55 }
  56
  57 FrameFormat &FrameFormat::set_samples(unsigned s)
  58 {
  59         samples = s;
  60         return *this;
  61 }
  62
  63 int FrameFormat::index(FrameAttachment fa) const
  64 {
  65         for(unsigned i=0; i<count; ++i)
  66                 if(get_attach_point(attachments[i])==get_attach_point(fa))
  67                         return i;
  68         return -1;
  69 }
  70
  71
  72 FrameAttachment make_typed_attachment(FrameAttachment fa, PixelFormat pf)
  73 {
  74         PixelComponents comp = get_components(pf);
  75         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
  76         {
  77                 if(comp!=DEPTH_COMPONENT)
  78                         throw invalid_argument("make_typed_attachment");
  79         }
  80         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
  81         {
  82                 if(comp!=STENCIL_INDEX)
  83                         throw invalid_argument("make_typed_attachment");
  84         }
  85         else
  86         {
  87                 if(comp!=RED && comp!=RG && comp!=RGB && comp!=RGBA)
  88                         throw invalid_argument("make_typed_attachment");
  89         }
  90
  91         DataType type = get_component_type(pf);
  92         return static_cast<FrameAttachment>((fa&0xFC00) | (is_float(type)*0x100) | get_type_size(type)<<4 | get_component_count(comp));
  93 }
  94
  95 FrameAttachment make_indexed_attachment(FrameAttachment fa, unsigned i)
  96 {
  97         if(get_attach_point(fa)==get_attach_point(COLOR_ATTACHMENT))
  98         {
  99                 if(i>61)
 100                         throw out_of_range("make_indexed_attachment");
 101                 return static_cast<FrameAttachment>(fa+(i<<10));
 102         }
 103         else
 104                 throw invalid_argument("make_indexed_attachment");
 105 }
 106
 107 PixelFormat get_attachment_pixelformat(uint16_t fa)
 108 {
 109         PixelComponents comp;
 110         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
 111                 comp = DEPTH_COMPONENT;
 112         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
 113                 comp = STENCIL_INDEX;
 114         else
 115                 comp = static_cast<PixelComponents>(fa&7);
 116
 117         DataType type;
 118         if(fa&0x100)
 119                 type = static_cast<DataType>((fa&0x70)>>4 | 0x300);
 120         else
 121                 type = static_cast<DataType>((fa&0x70)>>4);
 122
 123         return make_pixelformat(comp, type);
 124 }
 125
 126 GLenum get_gl_attachment(FrameAttachment fa)
 127 {
 128         if(get_attach_point(fa)==get_attach_point(DEPTH_ATTACHMENT))
 129                 return GL_DEPTH_ATTACHMENT;
 130         else if(get_attach_point(fa)==get_attach_point(STENCIL_ATTACHMENT))
 131                 return GL_STENCIL_ATTACHMENT;
 132         else
 133                 return GL_COLOR_ATTACHMENT0+get_attach_point(fa);
 134 }
 135
 136 } // namespace GL
 137 } // namespace Msp