This function allows you to draw aliased alpha pixels on your pictures. It is possible to tune the rendering by playing with the $Format array. To learn more about this please read the Format array guide. Pixels like all simple drawing functions are supporting anti-alias and shadows.

drawAntialiasPixel is a core function of pChart. A lot of internal drawing methods are based on it as the whole antialiasing processing is done trough it. Antialias can only be done on a pixel unit. To learn more on antialiasing, read this article.

drawAntialiasPixel($X,$Y,$Format="");

Where :




It is possible to customize the pixel rendering by playing with this array. Providing a detailled configuration is not mandatory, by default the pixel will be drawn black with no transparency.

 for($X=0;$X<=160;$X++)
  {
   for($Y=0;$Y<=160;$Y++)
    {
     /* Play with the color / transparency factor */
     $PixelSettings = array("R"=>128,"G"=>255-$Y,"B"=>$X,"Alpha"=>cos(deg2rad($X*2))*50+50);

     /* Draw with antialiasing (adding +.4 to the pixel X position) */
     $myPicture->drawAntialiasPixel($X*2+20.4,$Y+45,$PixelSettings);

     /* Draw continuous pixels */
     $myPicture->drawAntialiasPixel($X+400,$Y+45,$PixelSettings);
    }
  }

This will draw two areas with a computed gradient of color/alpha.