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()=="COLOR_INDEX")
  14                 fmt = COLOR_INDEX;
  15         else if(conv.get()=="STENCIL_INDEX")
  16                 fmt = STENCIL_INDEX;
  17         else if(conv.get()=="DEPTH_COMPONENT")
  18                 fmt = DEPTH_COMPONENT;
  19         else if(conv.get()=="RED")
  20                 fmt = RED;
  21         else if(conv.get()=="GREEN")
  22                 fmt = GREEN;
  23         else if(conv.get()=="BLUE")
  24                 fmt = BLUE;
  25         else if(conv.get()=="ALPHA")
  26                 fmt = ALPHA;
  27         else if(conv.get()=="RGB")
  28                 fmt = RGB;
  29         else if(conv.get()=="RGBA")
  30                 fmt = RGBA;
  31         else if(conv.get()=="BGR")
  32                 fmt = BGR;
  33         else if(conv.get()=="BGRA")
  34                 fmt = BGRA;
  35         else if(conv.get()=="SRGB")
  36                 fmt = SRGB;
  37         else if(conv.get()=="SRGB_ALPHA")
  38                 fmt = SRGB_ALPHA;
  39         else if(conv.get()=="LUMINANCE")
  40                 fmt = LUMINANCE;
  41         else if(conv.get()=="LUMINANCE_ALPHA")
  42                 fmt = LUMINANCE_ALPHA;
  43         else if(conv.get()=="SLUMINANCE")
  44                 fmt = SLUMINANCE;
  45         else if(conv.get()=="SLUMINANCE_ALPHA")
  46                 fmt = SLUMINANCE_ALPHA;
  47         else
  48                 throw lexical_error(format("conversion of '%s' to PixelFormat", conv.get()));
  49 }
  50
  51 PixelFormat pixelformat_from_graphics(Graphics::PixelFormat pf)
  52 {
  53         switch(pf)
  54         {
  55         case Graphics::COLOR_INDEX: return COLOR_INDEX;
  56         case Graphics::LUMINANCE: return LUMINANCE;
  57         case Graphics::LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  58         case Graphics::RGB: return RGB;
  59         case Graphics::RGBX:
  60         case Graphics::RGBA: return RGBA;
  61         case Graphics::BGR: return BGR;
  62         case Graphics::BGRX:
  63         case Graphics::BGRA: return BGRA;
  64         default: throw invalid_argument("pixelformat_from_graphics");
  65         }
  66 }
  67
  68 PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat pf)
  69 {
  70         switch(pf)
  71         {
  72         case Graphics::RGBX:
  73         case Graphics::BGR:
  74         case Graphics::BGRX: return RGB;
  75         case Graphics::BGRA: return RGBA;
  76         default: return pixelformat_from_graphics(pf);
  77         }
  78 }
  79
  80 PixelFormat get_base_pixelformat(PixelFormat pf)
  81 {
  82         switch(pf)
  83         {
  84         case RGB8:
  85         case RGB16F:
  86         case RGB32F:
  87         case SRGB:
  88         case SRGB8: return RGB;
  89         case RGBA8:
  90         case RGBA16F:
  91         case RGBA32F:
  92         case SRGB_ALPHA:
  93         case SRGB8_ALPHA8: return RGBA;
  94         case LUMINANCE8:
  95         case LUMINANCE16F:
  96         case LUMINANCE32F:
  97         case SLUMINANCE:
  98         case SLUMINANCE8: return LUMINANCE;
  99         case LUMINANCE_ALPHA8:
 100         case LUMINANCE_ALPHA16F:
 101         case LUMINANCE_ALPHA32F:
 102         case SLUMINANCE_ALPHA:
 103         case SLUMINANCE8_ALPHA8: return LUMINANCE_ALPHA;
 104         default: return pf;
 105         }
 106 }
 107
 108 PixelFormat get_srgb_pixelformat(PixelFormat pf)
 109 {
 110         switch(pf)
 111         {
 112         case RGB: return SRGB;
 113         case RGBA: return SRGB_ALPHA;
 114         case RGB8: return SRGB8;
 115         case RGBA8: return SRGB8_ALPHA8;
 116         case LUMINANCE: return SLUMINANCE;
 117         case LUMINANCE8: return SLUMINANCE8;
 118         case LUMINANCE_ALPHA: return SLUMINANCE_ALPHA;
 119         case LUMINANCE_ALPHA8: return SLUMINANCE8_ALPHA8;
 120         default: return pf;
 121         }
 122 }
 123
 124 unsigned get_component_count(PixelFormat pf)
 125 {
 126         switch(get_base_pixelformat(pf))
 127         {
 128         case COLOR_INDEX:
 129         case STENCIL_INDEX:
 130         case DEPTH_COMPONENT:
 131         case RED:
 132         case GREEN:
 133         case BLUE:
 134         case LUMINANCE:
 135         case SLUMINANCE:
 136                 return 1;
 137         case LUMINANCE_ALPHA:
 138         case SLUMINANCE_ALPHA:
 139                 return 2;
 140         case RGB:
 141         case BGR:
 142                 return 3;
 143         case RGBA:
 144         case BGRA:
 145                 return 4;
 146         default:
 147                 throw invalid_argument("get_pixelformat_component_count");
 148         }
 149 }
 150
 151 unsigned get_component_size(PixelFormat pf)
 152 {
 153         switch(pf)
 154         {
 155         case RGB16F:
 156         case RGBA16F:
 157         case LUMINANCE16F:
 158         case LUMINANCE_ALPHA16F:
 159                 return 2;
 160         case RGB32F:
 161         case RGBA32F:
 162         case LUMINANCE32F:
 163         case LUMINANCE_ALPHA32F:
 164                 return 4;
 165         default:
 166                 return 1;
 167         }
 168 }
 169
 170 unsigned get_pixel_size(PixelFormat pf)
 171 {
 172         return get_component_count(pf)*get_component_size(pf);
 173 }
 174
 175 void require_pixelformat(PixelFormat pf)
 176 {
 177         switch(pf)
 178         {
 179         case RGB16F:
 180         case RGB32F:
 181         case RGBA16F:
 182         case RGBA32F:
 183         case LUMINANCE16F:
 184         case LUMINANCE32F:
 185         case LUMINANCE_ALPHA16F:
 186         case LUMINANCE_ALPHA32F:
 187                 { static Require _req(ARB_texture_float); }
 188                 break;
 189         case SRGB:
 190         case SRGB8:
 191         case SRGB_ALPHA:
 192         case SRGB8_ALPHA8:
 193         case SLUMINANCE:
 194         case SLUMINANCE8:
 195         case SLUMINANCE_ALPHA:
 196         case SLUMINANCE8_ALPHA8:
 197                 { static Require _req(EXT_texture_sRGB); }
 198                 break;
 199         case BGR:
 200         case BGRA:
 201                 { static Require _req(EXT_bgra); }
 202                 break;
 203         default:
 204                 break;
 205         }
 206 }
 207
 208 } // namespace GL
 209 } // namespace Msp