3 Replies Latest reply on May 12, 2016 9:38 AM by WolfShade

    CFimagedrawlines example


      I am still using CF8 and love it, but here's my question.

      Can someone show me an example of cfimagedrawlines

      that draws a left sloping rectangle?



        • 1. Re: CFimagedrawlines example
          WolfShade Level 4



          Adobe ColdFusion 9 * ImageDrawLine






          UPDATE:  Basically you provide the name of the image that you are affecting, the x/y coordinates of the start of the line, and the x/y coordinates of the end of the line.


          You will need four of these to create a left-slanted rectangle.


          UPDATE2: Okay.. played around with it.  imageDrawLineS() uses between three and five arguments: image name; array of X; array of Y; isPolygon; isFilled.


          <cfset myImage = imageNew('','500','500','argb','white') />
          <cfset imageSetAntiAliasing(myImage,'on') />
          <cfset imageSetDrawingColor(myImage, 'black') />
          <cfset attr = StructNew() />
          <cfset attr.width = 1 />
          <cfset attr.endcaps = "round" />
          <cfset imageSetDrawingStroke(myImage,attr) />
          <cfset x[1] = "10" /><cfset x[2] = "400" /><cfset x[3] = "480" /><cfset x[4] = "90" />
          <cfset y[1] = "10" /><cfset y[2] = "10" /><cfset y[3] = "400" /><cfset y[4] = "400" />
          <cfset imageDrawLines(myImage,x,y,true,false) />
          <cfimage action="writetobrowser" source="#myImage#" format="png" />
          • 2. Re: CFimagedrawlines example
            terryt76958218 Level 1

            <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">






            <cfparam default=10 name="X1">

            <cfparam default=20 name="X2">

            <cfparam default=30 name="X3">

            <cfparam default=40 name="X4">

            <cfparam default=10 name="Y1">

            <cfparam default=20 name="Y2">

            <cfparam default=30 name="Y3">

            <cfparam default=40 name="Y4">


            <cfoutput><cfform action="SQUARE2.CFM" method="post" preservedata="Yes">

            <td>X1<input type="text" name="X1" value="#X1#" size="3" maxlength="3"><br>

            X2<input type="text" name="X2" value="#X2#" size="3" maxlength="3"><br>

            X3<input type="text" name="X3" value="#X3#" size="3" maxlength="3"><br>

            X4<input type="text" name="X4" value="#X4#" size="3" maxlength="3"><br>


            <td>Y1<input type="text" name="Y1" value="#Y1#" size="3" maxlength="3"><br>

            Y2<input type="text" name="Y2" value="#Y2#" size="3" maxlength="3"><br>

            Y3<input type="text" name="Y3" value="#Y3#" size="3" maxlength="3"><br>

            Y4<input type="text" name="Y4" value="#Y4#" size="3" maxlength="3"><br>




            <input type="submit" name="X" value="SUBMIT">



            <cfset myImage=ImageNew("",400,250,"grayscale","GREEN")>

            <!--- Set the drawing color to cyan. --->

            <cfset ImageSetDrawingColor(myImage,"black")>

            <!--- Turn on antialiasing to improve image quality. --->

            <cfset ImageSetAntialiasing(myImage,"on")>

            <!--- Create arrays for the x and y coordinates. --->

            <cfset x = ArrayNew(1)>

            <cfset y = ArrayNew(1)>

            <!--- Set the values for the x and y coordinates for three connected line segments: the first

            segment begins at (100,50) and ends at (50,100). The second segment begins at (50, 100) and

            ends at (200,100). The third segment begins at (200,100) and ends at (100,200). --->

            <cfset x[1] = "#X1#">

            <cfset x[2] = "#X2#">

            <cfset x[3] = "#X3#">

            <cfset x[4] = "#X4#">

            <!--- <cfset x[5] = "#X5#"> --->

            <cfset y[1] = "#Y1#">

            <cfset y[2] = "#Y2#">

            <cfset y[3] = "#Y3#">

            <cfset y[4] = "#Y4#">

            <!--- <cfset y[5] = "#Y5#"> --->

            <!--- Draw the lines on the image. --->

            <cfset ImageDrawLines(myImage,x,y,"yes")>

            <!--- Display the image in a browser. --->




            <cfimage source=#myImage# action="writeToBrowser">



            • 3. Re: CFimagedrawlines example
              WolfShade Level 4

              I don't typically write code for others - I'm pretty staunch about those seeking help write their own and then I/we can help troubleshoot.


              But I've never even HEARD of imageDrawLines() until your question, and had to see how to work it.  So.. at that point, why NOT provide it? 


              Glad to see you got it working.