Use DevIL for loading images

[libs/gl.git] / source / ilwrap.cpp

diff --git a/source/ilwrap.cpp b/source/ilwrap.cpp
new file mode 100644 (file)
index 0000000..be8442b
--- /dev/null
+++ b/source/ilwrap.cpp
@@ -0,0 +1,73 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <IL/il.h>
+#include <msp/core/except.h>
+#include "ilwrap.h"
+
+namespace Msp {
+namespace GL {
+
+Image::Image()
+{
+       if(!init_done)
+       {
+               ilInit();
+               ilEnable(IL_ORIGIN_SET);
+               ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
+               init_done=true;
+       }
+
+       ilGenImages(1, &id);
+}
+
+Image::~Image()
+{
+       ilDeleteImages(1, &id);
+}
+
+void Image::load(const std::string &fn)
+{
+       ilBindImage(id);
+       if(!ilLoadImage(const_cast<char *>(fn.c_str())))
+               throw Exception("Error loading image "+fn);
+}
+
+PixelFormat Image::get_format() const
+{
+       switch(ilGetInteger(IL_IMAGE_FORMAT))
+       {
+       case IL_COLOR_INDEX: return COLOR_INDEX;
+       case IL_LUMINANCE: return LUMINANCE;
+       case IL_LUMINANCE_ALPHA: return LUMINANCE_ALPHA;
+       case IL_RGB: return RGB;
+       case IL_RGBA: return RGBA;
+       case IL_BGR: return BGR;
+       case IL_BGRA: return BGRA;
+       default: throw InvalidParameterValue("Unknown pixel format in image");
+       }
+}
+
+unsigned Image::get_width() const
+{
+       return ilGetInteger(IL_IMAGE_WIDTH);
+}
+
+unsigned Image::get_height() const
+{
+       return ilGetInteger(IL_IMAGE_HEIGHT);
+}
+
+const void *Image::get_data() const
+{
+       return ilGetData();
+}
+
+bool Image::init_done=false;
+
+} // namespace GL
+} // namespace Msp