source/graphics/image.cpp

   1 #ifdef WITH_DEVIL
   2 #include <IL/il.h>
   3 #endif
   4 #include <msp/fs/utils.h>
   5 #include <msp/io/file.h>
   6 #include <msp/io/memory.h>
   7 #include "image.h"
   8 #include "image_devil.h"
   9 #include "image_png.h"
  10 #include "image_private.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace Graphics {
  16
  17 Image::Private::Private()
  18 {
  19 #ifdef WITH_DEVIL
  20         id = 0;
  21 #endif
  22         fmt = RGB;
  23         width = 0;
  24         height = 0;
  25         data = 0;
  26 }
  27
  28
  29 Image::Image():
  30         priv(new Private)
  31 {
  32 #if !defined(WITH_DEVIL) && !defined(WITH_LIBPNG)
  33         throw runtime_error("no image support");
  34 #endif
  35 }
  36
  37 Image::~Image()
  38 {
  39 #ifdef WITH_DEVIL
  40         if(priv->id)
  41                 ilDeleteImages(1, &priv->id);
  42         else
  43 #endif
  44         delete[] priv->data;
  45         delete priv;
  46 }
  47
  48 void Image::load_file(const string &fn)
  49 {
  50         string ext = FS::extpart(fn);
  51 #ifdef WITH_LIBPNG
  52         if(ext==".png")
  53         {
  54                 IO::BufferedFile file(fn);
  55                 load_png(file, *priv, 0, 0);
  56         }
  57         else
  58 #endif
  59         {
  60 #ifdef WITH_DEVIL
  61                 load_devil_file(fn, *priv);
  62 #else
  63                 throw unsupported_image_format("DevIL needed for non-PNG images");
  64 #endif
  65         }
  66         (void)fn;
  67 }
  68
  69 void Image::load_io(IO::Base &io)
  70 {
  71         char sig_buf[8];
  72         unsigned sig_len = io.read(sig_buf, sizeof(sig_buf));
  73 #ifdef WITH_LIBPNG
  74         if(sig_len==sizeof(sig_buf) && is_png(sig_buf, sig_len))
  75                 load_png(io, *priv, sig_buf, sig_len);
  76         else
  77 #endif
  78         {
  79 #ifdef WITH_DEVIL
  80                 load_devil_io(io, *priv, sig_buf, sig_len);
  81 #else
  82                 throw unsupported_image_format("DevIL needed for non-PNG images");
  83 #endif
  84         }
  85 }
  86
  87 PixelFormat Image::get_format() const
  88 {
  89         return priv->fmt;
  90 }
  91
  92 unsigned Image::get_width() const
  93 {
  94         return priv->width;
  95 }
  96
  97 unsigned Image::get_height() const
  98 {
  99         return priv->height;
 100 }
 101
 102 const void *Image::get_data() const
 103 {
 104         return priv->data;
 105 }
 106
 107 } // namespace Graphics
 108 } // namespace Msp