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POWriteableBitmap failing badly, pixel array very inaccurate
 

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  1. POWriteableBitmap failing badly, pixel array very inaccurate
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    <p>I have tried, literally for hours, and I have not been able to budge this problem.</p> <p>I have a UserControl, that is 800x369, and it contains, simply, a path that forms a worldmap. I put this on a landscape page, then I render it into a WriteableBitmap. I then run a conversion to turn the 1d Pixels array into a 2d array of integers. Then, to check the conversion, I wire up the custom control's click command to use the Point.X and Point.Y relative to the custom control in the newly created array. My logic is thus:</p> <pre><code>wb = new WriteableBitmap(worldMap, new TranslateTransform()); wb.Invalidate(); intTest = wb.Pixels.To2DArray(wb.PixelWidth); </code></pre> <p>My conversion logic is as such:</p> <pre><code>public static int[,] To2DArray(this int[] arr,int rowLength) { int[,] output = new int[rowLength, arr.Length / rowLength]; if (arr.Length % rowLength != 0) throw new IndexOutOfRangeException(); for (int i = 0; i &lt; arr.Length; i++) { output[i % rowLength, i / rowLength] = arr[i]; } return output; } </code></pre> <p>Now, when I do the checking, I get completely and utterly strange results: apparently all pixels are either at values of -1 or 0, and these values are <strong><em>completely independent</em></strong> of the original colours.</p> <p>Just for posterity: here's my checking code:</p> <pre><code>private void Check(object sender, MouseButtonEventArgs e) { Point click = e.GetPosition(worldMap); ChangeNotification(intTest[(int)click.X,(int)click.Y].ToString()); } </code></pre> <p>The result show absolutely no correlation to the path that the WriteableBitmap has rendered into it. The path has a fill of solid white.</p> <p>What the heck is going on? I've tried for hours with no luck. Please, this is the major problem stopping me from submitting my first WP7 app. Any guidance?</p>
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    1. USLiam Dawson
    1. USLiam Dawson
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    1. COPlease zip up your project so we can test this more easily.
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      1. USHades32
    2. COI've given up, I no longer have the code available either. Can we get close votes running?
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      1. USLiam Dawson
 

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