source/pixelformat.cpp

   1 #include <msp/gl/extensions/arb_texture_float.h>
   2 #include <msp/gl/extensions/ext_bgra.h>
   3 #include <msp/strings/format.h>
   4 #include "pixelformat.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace GL {
  10
  11 void operator>>(const LexicalConverter &conv, PixelFormat &fmt)
  12 {
  13         if(conv.get()=="STENCIL_INDEX")
  14                 fmt = STENCIL_INDEX;
  15         else if(conv.get()=="DEPTH_COMPONENT")
  16                 fmt = DEPTH_COMPONENT;
  17         else if(conv.get()=="RGB")
  18                 fmt = RGB;
  19         else if(conv.get()=="RGBA")
  20                 fmt = RGBA;
  21         else if(conv.get()=="BGR")
  22                 fmt = BGR;
  23         else if(conv.get()=="BGRA")
  24                 fmt = BGRA;
  25         else if(conv.get()=="SRGB")
  26                 fmt = SRGB;
  27         else if(conv.get()=="SRGB_ALPHA")
  28                 fmt = SRGB_ALPHA;
  29         else if(conv.get()=="LUMINANCE")
  30                 fmt = LUMINANCE;
  31         else if(conv.get()=="LUMINANCE_ALPHA")
  32                 fmt = LUMINANCE_ALPHA;
  33         else if(conv.get()=="SLUMINANCE")
  34                 fmt = SLUMINANCE;
  35         else if(conv.get()=="SLUMINANCE_ALPHA")
  36                 fmt = SLUMINANCE_ALPHA;
  37         else
  38                 throw lexical_error(format("conversion of '%s' to PixelFormat", conv.get()));
  39 }
  40
  41 PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
  42 {
  43         switch(pf)
  44         {
  45         case Graphics::LUMINANCE: return LUMINANCE;
  46         case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  47         case Graphics::RGB: return RGB;
  48         case Graphics::RGBX:
  49         case Graphics::RGBA: return RGBA;
  50         case Graphics::BGR: return BGR;
  51         case Graphics::BGRX:
  52         case Graphics::BGRA: return BGRA;
  53         default: throw invalid_argument("pixelformat_from_graphics");
  54         }
  55 }
  56
  57 PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat pf)
  58 {
  59         switch(pf)
  60         {
  61         case Graphics::RGBX:
  62         case Graphics::BGR:
  63         case Graphics::BGRX: return RGB;
  64         case Graphics::BGRA: return RGBA;
  65         default: return pixelformat_from_graphics(pf);
  66         }
  67 }
  68
  69 PixelFormat get_base_pixelformat(PixelFormat pf)
  70 {
  71         switch(pf)
  72         {
  73         case RGB8:
  74         case RGB16F:
  75         case RGB32F:
  76         case SRGB:
  77         case SRGB8: return RGB;
  78         case RGBA8:
  79         case RGBA16F:
  80         case RGBA32F:
  81         case SRGB_ALPHA:
  82         case SRGB8_ALPHA8: return RGBA;
  83         case LUMINANCE8:
  84         case LUMINANCE16F:
  85         case LUMINANCE32F:
  86         case SLUMINANCE:
  87         case SLUMINANCE8: return LUMINANCE;
  88         case LUMINANCE_ALPHA8:
  89         case LUMINANCE_ALPHA16F:
  90         case LUMINANCE_ALPHA32F:
  91         case SLUMINANCE_ALPHA:
  92         case SLUMINANCE8_ALPHA8: return LUMINANCE_ALPHA;
  93         default: return pf;
  94         }
  95 }
  96
  97 PixelFormat get_srgb_pixelformat(PixelFormat pf)
  98 {
  99         switch(pf)
 100         {
 101         case RGB: return SRGB;
 102         case RGBA: return SRGB_ALPHA;
 103         case RGB8: return SRGB8;
 104         case RGBA8: return SRGB8_ALPHA8;
 105         case LUMINANCE: return SLUMINANCE;
 106         case LUMINANCE8: return SLUMINANCE8;
 107         case LUMINANCE_ALPHA: return SLUMINANCE_ALPHA;
 108         case LUMINANCE_ALPHA8: return SLUMINANCE8_ALPHA8;
 109         default: return pf;
 110         }
 111 }
 112
 113 unsigned get_component_count(PixelFormat pf)
 114 {
 115         switch(get_base_pixelformat(pf))
 116         {
 117         case STENCIL_INDEX:
 118         case DEPTH_COMPONENT:
 119         case LUMINANCE:
 120         case SLUMINANCE:
 121                 return 1;
 122         case LUMINANCE_ALPHA:
 123         case SLUMINANCE_ALPHA:
 124                 return 2;
 125         case RGB:
 126         case BGR:
 127                 return 3;
 128         case RGBA:
 129         case BGRA:
 130                 return 4;
 131         default:
 132                 throw invalid_argument("get_component_count");
 133         }
 134 }
 135
 136 unsigned get_component_size(PixelFormat pf)
 137 {
 138         switch(pf)
 139         {
 140         case RGB16F:
 141         case RGBA16F:
 142         case LUMINANCE16F:
 143         case LUMINANCE_ALPHA16F:
 144                 return 2;
 145         case RGB32F:
 146         case RGBA32F:
 147         case LUMINANCE32F:
 148         case LUMINANCE_ALPHA32F:
 149                 return 4;
 150         default:
 151                 return 1;
 152         }
 153 }
 154
 155 unsigned get_pixel_size(PixelFormat pf)
 156 {
 157         return get_component_count(pf)*get_component_size(pf);
 158 }
 159
 160 void require_pixelformat(PixelFormat pf)
 161 {
 162         switch(pf)
 163         {
 164         case RGB16F:
 165         case RGB32F:
 166         case RGBA16F:
 167         case RGBA32F:
 168         case LUMINANCE16F:
 169         case LUMINANCE32F:
 170         case LUMINANCE_ALPHA16F:
 171         case LUMINANCE_ALPHA32F:
 172                 { static Require _req(ARB_texture_float); }
 173                 break;
 174         case SRGB:
 175         case SRGB8:
 176         case SRGB_ALPHA:
 177         case SRGB8_ALPHA8:
 178         case SLUMINANCE:
 179         case SLUMINANCE8:
 180         case SLUMINANCE_ALPHA:
 181         case SLUMINANCE8_ALPHA8:
 182                 { static Require _req(EXT_texture_sRGB); }
 183                 break;
 184         case BGR:
 185         case BGRA:
 186                 { static Require _req(EXT_bgra); }
 187                 break;
 188         default:
 189                 break;
 190         }
 191 }
 192
 193 } // namespace GL
 194 } // namespace Msp