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