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 using namespace std;
  13
  14 namespace Msp {
  15 namespace GL {
  16
  17 Image::Image()
  18 {
  19         static bool init_done=false;
  20
  21         if(!init_done)
  22         {
  23                 ilInit();
  24                 ilEnable(IL_ORIGIN_SET);
  25                 ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
  26                 init_done=true;
  27         }
  28
  29         ilGenImages(1, &id);
  30 }
  31
  32 Image::~Image()
  33 {
  34         ilDeleteImages(1, &id);
  35 }
  36
  37 void Image::load_file(const string &fn)
  38 {
  39         ilBindImage(id);
  40         if(!ilLoadImage(const_cast<char *>(fn.c_str())))
  41                 throw Exception("Error loading image "+fn);
  42 }
  43
  44 void Image::load_lump(const void *data, unsigned size)
  45 {
  46         ilBindImage(id);
  47         if(!ilLoadL(IL_TYPE_UNKNOWN, const_cast<void *>(data), size))
  48                 throw Exception("Error loading image from lump");
  49 }
  50
  51 PixelFormat Image::get_format() const
  52 {
  53         switch(ilGetInteger(IL_IMAGE_FORMAT))
  54         {
  55         case IL_COLOR_INDEX: return COLOR_INDEX;
  56         case IL_LUMINANCE: return LUMINANCE;
  57         case IL_LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
  58         case IL_RGB: return RGB;
  59         case IL_RGBA: return RGBA;
  60         case IL_BGR: return BGR;
  61         case IL_BGRA: return BGRA;
  62         default: throw InvalidParameterValue("Unknown pixel format in image");
  63         }
  64 }
  65
  66 unsigned Image::get_width() const
  67 {
  68         return ilGetInteger(IL_IMAGE_WIDTH);
  69 }
  70
  71 unsigned Image::get_height() const
  72 {
  73         return ilGetInteger(IL_IMAGE_HEIGHT);
  74 }
  75
  76 const void *Image::get_data() const
  77 {
  78         return ilGetData();
  79 }
  80
  81 } // namespace GL
  82 } // namespace Msp