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<html>
<!--------------------------------------------------->
<!--             Docs/figures - SGE                -->
<!--------------------------------------------------->
<head>
<meta http-equiv="content-type" content="text/html;charset=iso-8859-1">
<title>SGE Documentation - Figures</title>
</head>

<body bgcolor=#DED7A0>

<H1>Figures</H1>

<P>
<UL>
<LI><A HREF="#sge_HLine">sge_H/VLine</A>
<LI><A HREF="#sge_DoLine">sge_DoLine</A>
<LI><A HREF="#sge_Line">sge_Line</A>
<LI><A HREF="#sge_Rect">sge_Rect</A>
<LI><A HREF="#sge_FilledRect">sge_FilledRect</A>
<LI><A HREF="#sge_DoCircle">sge_DoCircle</A>
<LI><A HREF="#sge_Circle">sge_Circle</A>
<LI><A HREF="#sge_FilledCircle">sge_FilledCircle</A>
<LI><A HREF="#sge_DoEllipse">sge_DoEllipse</A>
<LI><A HREF="#sge_Ellipse">sge_Ellipse</A>
<LI><A HREF="#sge_FilledEllipse">sge_FilledEllipse</A>
<LI><A HREF="#sge_Bezier">sge_Bezier</A>
</UL>
<BR>

<B>Important!</B>
<UL>
<LI>The clipping rectangle set by SDL_SetClipRect() will always be respected.
<LI>These functions will lock the surface if necessary, but you can control this with <A HREF="surface.html#sge_Lock_ON">sge_Lock_ON/OFF()</A>.
<LI>The destination surface will be updated if necessary, but you should really do this yourself to avoid unnecessary updates; control this with <A HREF="surface.html#sge_Update_">sge_Update_ON/OFF()</A>.
<LI>Most drawing primitives can blend with the background; use the Alpha version of the routine to do this.
<LI>A few primitives also has an anti-aliasing mode; use the AA version of the routine to get this feature.
</UL>
<BR><BR><BR><BR>


<a name="sge_HLine"><B>sge_H/VLine</B></a>
<UL>
<LI>void <B>sge_HLine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint32 Color<B>)</B>
<LI>void <B>sge_HLine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_HLineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint32 Color, Uint8 alpha<B>)</B>
<LI>void <B>sge_HLineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_VLine(</B>SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint32 Color<B>)</B>
<LI>void <B>sge_VLine(</B>SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_VLineAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint32 Color, Uint8 alpha<B>)</B>
<LI>void <B>sge_VLineAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws a horizontal or vertical line.<BR><BR><BR><BR>


<a name="sge_DoLine"><B>sge_DoLine</B></a>
<UL>
<LI>void <B>sge_DoLine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 Color, void Callback()<B>)</B>
<LI>void <B>sge_DoLine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, void Callback()<B>)</B>
</UL>
Calculates all the points along a line from p1 to p2, calling the supplied function for each point. The callback function 
should look like Callback(SDL_Surface *Surf, Sint16 x, Sint16 y, Uint32 Color). For example, to draw a line without lock or 
update: sge_DoLine(Surface, x1, y1, x2, y2, Color, _PutPixel).<BR><BR><BR><BR>


<a name="sge_Line"><B>sge_Line</B></a>
<UL>
<LI>void <B>sge_Line(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 Color<B>)</B>
<LI>void <B>sge_Line(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_LineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 Color, Uint8 alpha<B>)</B>
<LI>void <B>sge_LineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AALine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 Color<B>)</B>
<LI>void <B>sge_AALine(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_AALineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 Color, Uint8 alpha<B>)</B>
<LI>void <B>sge_AALineAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>

</UL>
Draws a line from p1 to p2.<BR><BR><BR><BR>


<a name="sge_Rect"><B>sge_Rect</B></a>
<UL>
<LI>void <B>sge_Rect(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color<B>)</B>
<LI>void <B>sge_Rect(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_RectAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_RectAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws a rectangle.<BR><BR><BR><BR>


<a name="sge_FilledRect"><B>sge_FilledRect</B></a>
<UL>
<LI>void <B>sge_FilledRect(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color<B>)</B>
<LI>void <B>sge_FilledRect(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_FilledRectAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_FilledRectAlpha(</B>SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws a filled rectangle. You can also use SDL_FillRect() directly.<BR><BR><BR><BR>


<a name="sge_DoCircle"><B>sge_DoCircle</B></a>
<UL>
<LI>void <B>sge_DoCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color, void Callback()<B>)</B>
<LI>void <B>sge_DoCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B, void Callback()<B>)</B>
</UL>
Calculates all the points in a circle around point (x,y) with radius r, calling the supplied function for each one. The callback 
function should look like Callback(SDL_Surface *Surf, Sint16 x, Sint16 y, Uint32 Color).<BR><BR><BR><BR>


<a name="sge_Circle"><B>sge_Circle</B></a>
<UL>
<LI>void <B>sge_Circle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color<B>)</B>
<LI>void <B>sge_Circle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_CircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_CircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AACircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color<B>)</B>
<LI>void <B>sge_AACircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_AACircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_AACircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws a circle with the specified centre and radius.<BR><BR><BR><BR>


<a name="sge_FilledCircle"><B>sge_FilledCircle</B></a>
<UL>
<LI>void <B>sge_FilledCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color<B>)</B>
<LI>void <B>sge_FilledCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_FilledCircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_FilledCircleAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AAFilledCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint32 color<B>)</B>
<LI>void <B>sge_AAFilledCircle(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 r, Uint8 R, Uint8 G, Uint8 B<B>)</B>
</UL>
Draws a filled circle with the specified centre and radius.<BR><BR><BR><BR>


<a name="sge_DoEllipse"><B>sge_DoEllipse</B></a>
<UL>
<LI>void <B>sge_DoEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color, void Callback()<B>)</B>
<LI>void <B>sge_DoEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B, void Callback()<B>)</B>
</UL>
Calculates all the points in an ellipse around point (x,y) with x-radius rx and y-radius ry, calling the supplied function for each one. 
The callback function should look like Callback(SDL_Surface *Surf, Sint16 X, Sint16 Y, Uint32 Color).<BR><BR><BR><BR>


<a name="sge_Ellipse"><B>sge_Ellipse</B></a>
<UL>
<LI>void <B>sge_Ellipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color<B>)</B>
<LI>void <B>sge_Ellipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_EllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_EllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AAEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color<B>)</B>
<LI>void <B>sge_AAEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_AAEllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_AAEllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws an ellipse with the specified centre and radius.<BR><BR><BR><BR>


<a name="sge_FilledEllipse"><B>sge_FilledEllipse</B></a>
<UL>
<LI>void <B>sge_FilledEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color<B>)</B>
<LI>void <B>sge_FilledEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_FilledEllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_FilledEllipseAlpha(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AAFilledEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color<B>)</B>
<LI>void <B>sge_AAFilledEllipse(</B>SDL_Surface *Surface, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint8 R, Uint8 G, Uint8 B<B>)</B>
</UL>
Draws a filled ellipse with the specified centre and radius.<BR><BR><BR><BR>


<a name="sge_Bezier"><B>sge_Bezier</B></a>
<UL>
<LI>void <B>sge_Bezier(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint32 color<B>)</B>
<LI>void <B>sge_Bezier(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_BezierAlpha(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_BezierAlpha(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
<LI>void <B>sge_AABezier(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint32 color<B>)</B>
<LI>void <B>sge_AABezier(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint8 R, Uint8 G, Uint8 B<B>)</B>
<LI>void <B>sge_AABezierAlpha(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint32 color, Uint8 alpha<B>)</B>
<LI>void <B>sge_AABezierAlpha(</B>SDL_Surface *surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2,Sint16 x3, Sint16 y3, Sint16 x4, Sint16 y4, int level, Uint8 R, Uint8 G, Uint8 B, Uint8 alpha<B>)</B>
</UL>
Draws a bezier curve from p1 to p4 with the control points p2 and p3. The variable 'level' indicates how good precision the function 
should use, 4-7 is normal.<BR><BR><BR><BR>

</P>

	
<BR><BR><BR><HR>
<P><I><SMALL>
Copyright &copy; 1999-2002 Anders Lindstrm<BR>
Last updated 020102
</SMALL></I></P>

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