[libGD] #208 [Comment added] Scatter Filter

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The following task has a new comment added:

FS#208 - Scatter Filter
User who did this - Kalle Sommer Nielsen (Kalle)

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Latest update based on comments by Pierre, project files (patch, test, results) are available at:
http://php.tuxxedo.net/patches/gd/scatter/v3/

This patch contains the following changes compared to the last one:

  * The scatter filter is moved to the gd_filter.c file
  * GD_SCATTER_MAIN now makes use of GET_PIXEL_FUNCTION
  * gd_filter.c have a new macro called PIXEL_FUNCTION_DECLARE to declare variables for use with the GET_PIXEL_FUNCTION
  * The gdImageScatter have been removed and the gdImageScatterEx is now called gdImageScatter
  * The gdImageScatterColor have been removed and the gdImageScatterColorList is now called gdImageScatterColor
  * The gdImagescatterColor function now takes an additional parameter to specify the number of colors instead of generating it itself at runtime
  * The imagefilter() function now works like the following:
     * imagefilter($im, IMG_FILTER_SCATTER, $scatter, $modifier = NULL, $colors = NULL)
     * If only the $scatter parameter is present, then the function will generate an inverted value of $scatter and use that for the "sub" parameter for the filter and $scatter for the "plus" parameter
     * If the $modifier parameter is present, then similar to if no parameters were present then it will be used as "sub" and $scatter as "plus" parameters to the filter
     * If the $colors parameter is present, and the parameter is an array or object, then the HASH_OF macro will be used and a C array listing the colors will be generated and sent to the filter, otherwise (scalar values) then the value will be converted to an int and sent as a single color to scatter

Example - general scatter:

{{http://php.tuxxedo.net/patches/gd/scatter/v3/test_compare.png}}

Example - Color scatter with 1 color:

{{http://php.tuxxedo.net/patches/gd/scatter/v3/test_compare_color_1.png}}

Example - Color scatter with 2 colors:

{{http://php.tuxxedo.net/patches/gd/scatter/v3/test_compare_color_2.png}}
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More information can be found at the following URL:
http://bugs.libgd.org/?do=details&task_id=208#comment619

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