source/pixelformat.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "except.h"
   9 #include "pixelformat.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GL {
  15
  16 istream &operator>>(istream &in, PixelFormat &fmt)
  17 {
  18         string word;
  19
  20         in>>word;
  21         if(word=="COLOR_INDEX")
  22                 fmt = COLOR_INDEX;
  23         else if(word=="STENCIL_INDEX")
  24                 fmt = STENCIL_INDEX;
  25         else if(word=="DEPTH_COMPONENT")
  26                 fmt = DEPTH_COMPONENT;
  27         else if(word=="RED")
  28                 fmt = RED;
  29         else if(word=="GREEN")
  30                 fmt = GREEN;
  31         else if(word=="BLUE")
  32                 fmt = BLUE;
  33         else if(word=="ALPHA")
  34                 fmt = ALPHA;
  35         else if(word=="RGB")
  36                 fmt = RGB;
  37         else if(word=="RGBA")
  38                 fmt = RGBA;
  39         else if(word=="BGR")
  40                 fmt = BGR;
  41         else if(word=="BGRA")
  42                 fmt = BGRA;
  43         else if(word=="LUMINANCE")
  44                 fmt = LUMINANCE;
  45         else if(word=="LUMINANCE_ALPHA")
  46                 fmt = LUMINANCE_ALPHA;
  47         else
  48                 in.setstate(ios_base::failbit);
  49
  50         return in;
  51 }
  52
  53 PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
  54 {
  55         switch(pf)
  56         {
  57         case Graphics::COLOR_INDEX: return COLOR_INDEX;
  58         case Graphics::LUMINANCE: return LUMINANCE;
  59         case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  60         case Graphics::RGB: return RGB;
  61         case Graphics::RGBA: return RGBA;
  62         case Graphics::BGR: return BGR;
  63         case Graphics::BGRA: return BGRA;
  64         default: throw InvalidParameterValue("Unknown Graphics::PixelFormat");
  65         }
  66 }
  67
  68 PixelFormat get_base_pixelformat(PixelFormat pf)
  69 {
  70         switch(pf)
  71         {
  72         case RGB8:
  73         case RGB16F:
  74         case RGB32F: return RGB;
  75         case RGBA8:
  76         case RGBA16F:
  77         case RGBA32F: return RGBA;
  78         case LUMINANCE8:
  79         case LUMINANCE16F:
  80         case LUMINANCE32F: return LUMINANCE;
  81         case LUMINANCE_ALPHA8:
  82         case LUMINANCE_ALPHA16F:
  83         case LUMINANCE_ALPHA32F: return LUMINANCE_ALPHA;
  84         default: return pf;
  85         }
  86 }
  87
  88 } // namespace GL
  89 } // namespace Msp