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graphics.cpp

00001 /*      _______   __   __   __   ______   __   __   _______   __   __                 
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00007  * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/                      
00008  *
00009  * Copyright (c) 2004, 2005 darkbits                        Js_./
00010  * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
00011  * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
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00053  */
00054 
00055 /*
00056  * For comments regarding functions please see the header file. 
00057  */
00058 
00059 #include "guichan/graphics.hpp"
00060 #include "guichan/exception.hpp"
00061 #include "guichan/font.hpp"
00062 
00063 namespace gcn
00064 {
00065 
00066     Graphics::Graphics()
00067     {
00068         mFont = NULL;    
00069     }
00070   
00071     bool Graphics::pushClipArea(Rectangle area)
00072     {
00073         if (mClipStack.empty())
00074         {
00075             ClipRectangle carea;
00076             carea.x = area.x;
00077             carea.y = area.y;
00078             carea.width = area.width;
00079             carea.height = area.height;
00080             mClipStack.push(carea);
00081             return true;
00082         }
00083 
00084         ClipRectangle top = mClipStack.top();
00085         ClipRectangle carea;
00086         carea = area;
00087         carea.xOffset = top.xOffset + carea.x;
00088         carea.yOffset = top.yOffset + carea.y;
00089         carea.x += top.xOffset;
00090         carea.y += top.yOffset;
00091 
00092         bool result = carea.intersect(top);
00093 
00094         mClipStack.push(carea);
00095 
00096         return result;
00097     }
00098 
00099     void Graphics::popClipArea()
00100     {
00101     
00102         if (mClipStack.empty())
00103         {
00104             throw GCN_EXCEPTION("Tried to pop clip area from empty stack.");
00105         }    
00106 
00107         mClipStack.pop();    
00108     }
00109 
00110     const ClipRectangle& Graphics::getCurrentClipArea()
00111     {
00112         if (mClipStack.empty())
00113         {
00114             throw GCN_EXCEPTION("The clip area stack is empty.");
00115         }
00116         
00117         return mClipStack.top();
00118     }
00119     
00120     void Graphics::drawImage(const Image* image, int dstX, int dstY)
00121     {
00122         drawImage(image, 0, 0, dstX, dstY, image->getWidth(), image->getHeight());    
00123     }
00124 
00125     void Graphics::setFont(Font* font)
00126     {
00127         mFont = font;    
00128     }
00129 
00130     void Graphics::drawText(const std::string& text, int x, int y,
00131                             unsigned int alignment)
00132     {
00133         if (mFont == NULL)
00134         {
00135             throw GCN_EXCEPTION("No font set.");
00136         }
00137 
00138         switch (alignment)
00139         {
00140           case LEFT:            
00141               mFont->drawString(this, text, x, y);
00142               break;
00143           case CENTER:
00144               mFont->drawString(this, text, x - mFont->getWidth(text) / 2, y);
00145               break;
00146           case RIGHT:
00147               mFont->drawString(this, text, x - mFont->getWidth(text), y);
00148               break;
00149           default:
00150               throw GCN_EXCEPTION("Unknown alignment.");
00151         }        
00152     }    
00153 }

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