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// This file is part of the "Irrlicht Engine".
// written by Reinhard Ostermeier, reinhard@nospam.r-ostermeier.de
// modified by Thomas Alten
#include "CGUIImageList.h"
namespace irr
{
namespace gui
{
//! constructor
CGUIImageList::CGUIImageList( video::IVideoDriver* driver )
: Driver( driver ),
Texture( 0 ),
ImageCount( 0 ),
ImageSize( 0, 0 ),
ImagesPerRow( 0 ),
UseAlphaChannel( false )
{
#ifdef _DEBUG
setDebugName( "CGUIImageList" );
#endif
if( Driver )
{
Driver->grab();
}
}
//! destructor
CGUIImageList::~CGUIImageList()
{
if( Driver )
{
Driver->drop();
}
if( Texture )
{
Texture->drop();
}
}
//! Creates the image list from texture.
bool CGUIImageList::createImageList(video::ITexture* texture,
core::dimension2d<s32> imageSize,
bool useAlphaChannel)
{
if( !texture )
{
return false;
}
Texture = texture;
Texture->grab();
ImageSize = imageSize;
ImagesPerRow = Texture->getSize().Width / ImageSize.Width;
ImageCount = ImagesPerRow * Texture->getSize().Height / ImageSize.Height;
UseAlphaChannel = useAlphaChannel;
return true;
}
//! Draws an image and clips it to the specified rectangle if wanted
void CGUIImageList::draw( s32 index, const core::position2d<s32>& destPos,
const core::rect<s32>* clip /*= 0*/ )
{
core::rect<s32> sourceRect;
if( !Driver || index < 0 || index >= ImageCount )
{
return;
}
sourceRect.UpperLeftCorner.X = ( index % ImagesPerRow ) * ImageSize.Width;
sourceRect.UpperLeftCorner.Y = ( index / ImagesPerRow ) * ImageSize.Height;
sourceRect.LowerRightCorner.X = sourceRect.UpperLeftCorner.X + ImageSize.Width;
sourceRect.LowerRightCorner.Y = sourceRect.UpperLeftCorner.Y + ImageSize.Height;
Driver->draw2DImage( Texture, destPos, sourceRect, clip,
video::SColor( 255, 255, 255, 255 ), UseAlphaChannel );
}
} // end namespace gui
} // end namespace irr
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