source/pixelformat.cpp

   1 #include "except.h"
   2 #include "pixelformat.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GL {
   8
   9 istream &operator>>(istream &in, PixelFormat &fmt)
  10 {
  11         string word;
  12
  13         in>>word;
  14         if(word=="COLOR_INDEX")
  15                 fmt = COLOR_INDEX;
  16         else if(word=="STENCIL_INDEX")
  17                 fmt = STENCIL_INDEX;
  18         else if(word=="DEPTH_COMPONENT")
  19                 fmt = DEPTH_COMPONENT;
  20         else if(word=="RED")
  21                 fmt = RED;
  22         else if(word=="GREEN")
  23                 fmt = GREEN;
  24         else if(word=="BLUE")
  25                 fmt = BLUE;
  26         else if(word=="ALPHA")
  27                 fmt = ALPHA;
  28         else if(word=="RGB")
  29                 fmt = RGB;
  30         else if(word=="RGBA")
  31                 fmt = RGBA;
  32         else if(word=="BGR")
  33                 fmt = BGR;
  34         else if(word=="BGRA")
  35                 fmt = BGRA;
  36         else if(word=="LUMINANCE")
  37                 fmt = LUMINANCE;
  38         else if(word=="LUMINANCE_ALPHA")
  39                 fmt = LUMINANCE_ALPHA;
  40         else
  41                 in.setstate(ios_base::failbit);
  42
  43         return in;
  44 }
  45
  46 PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
  47 {
  48         switch(pf)
  49         {
  50         case Graphics::COLOR_INDEX: return COLOR_INDEX;
  51         case Graphics::LUMINANCE: return LUMINANCE;
  52         case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  53         case Graphics::RGB: return RGB;
  54         case Graphics::RGBA: return RGBA;
  55         case Graphics::BGR: return BGR;
  56         case Graphics::BGRA: return BGRA;
  57         default: throw InvalidParameterValue("Unknown Graphics::PixelFormat");
  58         }
  59 }
  60
  61 PixelFormat get_base_pixelformat(PixelFormat pf)
  62 {
  63         switch(pf)
  64         {
  65         case RGB8:
  66         case RGB16F:
  67         case RGB32F: return RGB;
  68         case RGBA8:
  69         case RGBA16F:
  70         case RGBA32F: return RGBA;
  71         case LUMINANCE8:
  72         case LUMINANCE16F:
  73         case LUMINANCE32F: return LUMINANCE;
  74         case LUMINANCE_ALPHA8:
  75         case LUMINANCE_ALPHA16F:
  76         case LUMINANCE_ALPHA32F: return LUMINANCE_ALPHA;
  77         default: return pf;
  78         }
  79 }
  80
  81 } // namespace GL
  82 } // namespace Msp