source/ilwrap.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 #ifdef WITH_DEVIL
   9 #include <IL/il.h>
  10 #endif
  11 #include <msp/core/except.h>
  12 #include "ilwrap.h"
  13
  14 using namespace std;
  15
  16 namespace Msp {
  17 namespace GL {
  18
  19 Image::Image()
  20 {
  21 #ifdef WITH_DEVIL
  22         static bool init_done=false;
  23
  24         if(!init_done)
  25         {
  26                 ilInit();
  27                 ilEnable(IL_ORIGIN_SET);
  28                 ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
  29                 init_done=true;
  30         }
  31
  32         ilGenImages(1, &id);
  33 #else
  34         throw Exception("DevIL support not compiled in");
  35 #endif
  36 }
  37
  38 Image::~Image()
  39 {
  40 #ifdef WITH_DEVIL
  41         ilDeleteImages(1, &id);
  42 #endif
  43 }
  44
  45 void Image::load_file(const string &fn)
  46 {
  47 #ifdef WITH_DEVIL
  48         ilBindImage(id);
  49         if(!ilLoadImage(const_cast<char *>(fn.c_str())))
  50                 throw Exception("Error loading image "+fn);
  51 #else
  52         (void)fn;
  53 #endif
  54 }
  55
  56 void Image::load_lump(const void *data, unsigned size)
  57 {
  58 #ifdef WITH_DEVIL
  59         ilBindImage(id);
  60         if(!ilLoadL(IL_TYPE_UNKNOWN, const_cast<void *>(data), size))
  61                 throw Exception("Error loading image from lump");
  62 #else
  63         (void)data; (void)size;
  64 #endif
  65 }
  66
  67 PixelFormat Image::get_format() const
  68 {
  69 #ifdef WITH_DEVIL
  70         switch(ilGetInteger(IL_IMAGE_FORMAT))
  71         {
  72         case IL_COLOR_INDEX: return COLOR_INDEX;
  73         case IL_LUMINANCE: return LUMINANCE;
  74         case IL_LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  75         case IL_RGB: return RGB;
  76         case IL_RGBA: return RGBA;
  77         case IL_BGR: return BGR;
  78         case IL_BGRA: return BGRA;
  79         default: throw InvalidParameterValue("Unknown pixel format in image");
  80         }
  81 #else
  82         return RGB;
  83 #endif
  84 }
  85
  86 unsigned Image::get_width() const
  87 {
  88 #ifdef WITH_DEVIL
  89         return ilGetInteger(IL_IMAGE_WIDTH);
  90 #else
  91         return 0;
  92 #endif
  93 }
  94
  95 unsigned Image::get_height() const
  96 {
  97 #ifdef WITH_DEVIL
  98         return ilGetInteger(IL_IMAGE_HEIGHT);
  99 #else
 100         return 0;
 101 #endif
 102 }
 103
 104 const void *Image::get_data() const
 105 {
 106 #ifdef WITH_DEVIL
 107         return ilGetData();
 108 #else
 109         return 0;
 110 #endif
 111 }
 112
 113 } // namespace GL
 114 } // namespace Msp