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 #include <IL/il.h>
   9 #include <msp/core/except.h>
  10 #include "ilwrap.h"
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 Image::Image()
  16 {
  17         if(!init_done)
  18         {
  19                 ilInit();
  20                 ilEnable(IL_ORIGIN_SET);
  21                 ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
  22                 init_done=true;
  23         }
  24
  25         ilGenImages(1, &id);
  26 }
  27
  28 Image::~Image()
  29 {
  30         ilDeleteImages(1, &id);
  31 }
  32
  33 void Image::load(const std::string &fn)
  34 {
  35         ilBindImage(id);
  36         if(!ilLoadImage(const_cast<char *>(fn.c_str())))
  37                 throw Exception("Error loading image "+fn);
  38 }
  39
  40 PixelFormat Image::get_format() const
  41 {
  42         switch(ilGetInteger(IL_IMAGE_FORMAT))
  43         {
  44         case IL_COLOR_INDEX: return COLOR_INDEX;
  45         case IL_LUMINANCE: return LUMINANCE;
  46         case IL_LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  47         case IL_RGB: return RGB;
  48         case IL_RGBA: return RGBA;
  49         case IL_BGR: return BGR;
  50         case IL_BGRA: return BGRA;
  51         default: throw InvalidParameterValue("Unknown pixel format in image");
  52         }
  53 }
  54
  55 unsigned Image::get_width() const
  56 {
  57         return ilGetInteger(IL_IMAGE_WIDTH);
  58 }
  59
  60 unsigned Image::get_height() const
  61 {
  62         return ilGetInteger(IL_IMAGE_HEIGHT);
  63 }
  64
  65 const void *Image::get_data() const
  66 {
  67         return ilGetData();
  68 }
  69
  70 bool Image::init_done=false;
  71
  72 } // namespace GL
  73 } // namespace Msp