GPLv3+

Watermarker

lavid — Sat, 10 Oct 2009 21:57:35 +0200

Watermarks a bunch of photos with the watermark file specified. Files are output to the ./WM subdirectory in the format specified.

The watermark is applied with a difference mode overlay in the bottom right corner. Let me know if something should be parametrized.

I run this script like so:
gimp -i -b '(python-fu-watermarker RUN-NONINTERACTIVE "{PATH-TO-FILES}" "{PATH-TO-WATERMARK}" "jpg")' -b '(gimp-quit 0)'

Straighten and Crop

programmer_ceds — Fri, 25 Sep 2009 23:30:48 +0200

A script that provides an easy method for straightening pictures and then, optionally cropping them to remove the resulting transparent areas.

The centre of rotation can be specified as can the type of cropping required.

The cropping can be performed by the GIMP rotate function but this can have unpredictable results. The Post Rotate Crop script provides more options and seems more reliable (let me know should you find a problem with it)

This version of Straighten and Crop uses the revised interface to the Post Rotate Crop script, including the option to select the aspect ratio of the cropped area.

The attached zip file includes the script and a text file of notes on its use.

Post Rotate Crop

programmer_ceds — Fri, 25 Sep 2009 23:23:19 +0200

(A revised version of the script - the changes are listed below)

Whilst originally intended to be used following a rotation the script can also be used following
other transformations, such as perspective, scale and shear. The transparent areas added to the
image by the transformation are removed to leave an opaque rectangle.

The script provides options that determine how the resulting rectangle should be maximized.

This procdure is slow to operate as a script but it is then available to users of Windows, Linux
and Macs. Neither does it require the installation of Python. It would run very much faster if
coded in c and included in The GIMP.

If the opaque area of the image is significantly smaller than the image size it will be more
efficient to manually crop the image so that it is only slightly larger than the opaque area
and then run this script.

The script is accessed via Tools/Transform Tools/Post Rotate Crop

The script is not intended to work for opaque areas that include reflex angles.

This version of the script includes the following changes/corrections:

1. The user interface has changed slightly
2. Fixed potential endless loop when maximizing the rectangle.
3. Fixed problem where gimp-drawable-get-pixel could be called with the coordinates of a pixel
that was outside the area of the unrotated image.
4. Added aspect ratio options.

The attached file includes the script and a text file of instructions about its use.

layers-slices - A slicing tool based on layers instead of guidelines

robert.hendrickx — Mon, 27 Jul 2009 11:02:01 +0200

This script is meant to cut an image is smaller pieces and save these images automatically based on the size and names of specific layers, images to be used in web layouts.

Other options I found are based on guidelines. This approach has 2 drawbacks for me :

Image used for web layout are not always a pure table. The image you needfor the banner has not the same width than the one you need for the side block, and there are "cells" of that table that you don't need
It's saved with an autogenerated name

If I'm wrong with this analysis, tell me... this script is perhaps a bad duplicate of some existing plugin I don't know about...

The idea here is to create a layer for each slice you need. This layer has 2 important characteristics :

It's name - which must be "SLICE-xxx" (case insensitive), where xxx is the name of the image file to create, including the extension (.jpg or .png supported)
It's size - no matter what is on the layer,oly it's size matter

For each of these "SLICE-*" layer, the image will be flatten (without the "SLICE-*" layers themselves), cropped to the layer's size and saved in the directory specified in the requested parameters. For .jpg images, the compression quality is requested in the parameters.

This script is my first scheme script, and has to be considered beta quality at most...

Perspective Reflection Script

dln385 — Tue, 28 Apr 2009 07:43:39 +0200

This script modifies a layer to have a perspective and reflection consistent with that perspective.

This script is not finished. It has not been tested very much, and it is missing major features to come later on.

To install this script, copy it to your scripts folder, then restart Gimp. If you don't know where your scripts folder is, then go to Edit > Preferences > Folders > Scripts.

To run this script, select Filters > Decor > Perspective Reflection.

Feedback is appreciated.

2-Dimensional Gradient v. 1.2

Charles Belov — Sun, 26 Apr 2009 16:24:26 +0200

2-Dimensional Gradient (2DG) produces a new layer containing a gradient that changes in two dimensions. People using non-English-language GIMP installations are encouraged to upgrade to this version.

9 sample gradients follow (collected into a single image):

It can generate gradients from corner colors, edge gradients and/or the existing image. Options may be manually set, randomly created or duplicated from an existing 2DG layer.

The layer options used are stored in the created layer name. The option duplication feature depends on this name.

Once installed and Script-Fu refreshed, 2DG can be found under Filters > Render > Pattern. It will be active if there is an active RGB image.

If you have a selection active when you run this script, the gradient area will be a rectangle sized to the selection. Non-rectangular selections will be supported through creation of an edit mask, but the gradient will be based on a rectangle.

Due to looping logic, the wider or taller the image, the longer it will take to render. So you might want to try gradients on a smaller image first, then reproduce the gradient on a larger image if you like the results. The "Current 2DG layer - all settings" option supports doing this action after trying other gradients or after closing and re-launching GIMP.

Options:

Option source:
Choose whether to enter all of the options yourself, or to generate some of them randomly.

Current 2DG Layer: If you have an existing 2DG layer selected, you can also choose to duplicate some of the options from the existing 2DG layer. This is handy if you want to replicate a smaller test in a larger area.

If you choose Random - all options or Current 2DG layer - all options, there is no point in setting any of the other options manually as they will be ignored (except for the checkbox to allow image source as an edge method).

Corner colors (top left, top right, bottom left, bottom right):
Specify colors to occupy the 4 corner pixels of the rectangle. This option will only have an effect for a particular corner if at least one adjacent edge uses that corner to generate the edge contents and the fill method uses that edge to generate the fill contents.

Gradients (top, bottom, left, right):
Specify gradients to occupy the edges of the rectangle. This option will only have an effect for a particular edge if the edge method chosen for that edge uses the gradient to generate the edge contents and the fill method chosen uses that specific edge to generate the selection fill.

Fill blend:
Choose between RGB, HSV (clockwise hue) or HSV counter-clockwise.

Edge methods:
Specify how to create the edge contents, either using a gradient between corner colors, using a specific gradient or using the existing image contents. This option will only have an effect for a particular edge if the fill method chosen uses that edge to generate the fill contents.

Fill method:
- If choosing Top to bottom, the left and right edges will be ignored.
- If choosing Left to right, the top and bottom edges will be ignored.
- If choosing a diagonal method, all edges will be used.

Edge repeat rule:
For each edge, allows specifying 0 to 9 repeats. "S" is for sawtooth repeat (color A to color B, repeat A to B, repeat A to B, etc.) T is for triangle repeat (color A to color B, repeat B to A, repeat A to B, etc.). The rule is positional. Specify count and S or T for top, then a space, then count and S or T for bottom, then a space, count and S or T for left, then a space, and finally count and S or T for right. The repeat rule for a particular edge will only have an effect if a gradient or adjacent corners are used to generate that edge and that edge is used by the fill method to create the fill.

Allow image source as an edge method in randomly-generated layers:
If you check this, generating a random layer can use the image source to create one or more edges of this layer. The downside of allowing this is that the layers produced using the image rule are harder or impossible to duplicate.

Known issues:
- May randomly fail, leaving a temporary selection active. If this occurs, Select All, then Select None to clear the selection.
- May not do a good job of handling gradients involving transparency/alpha.
- May not detect that the Current 2DG layer option has been chosen to use on a layer that is either not a 2DG layer or is a 2DG layer but has had its layer name changed. At the moment, anything not filled in by this procedure will be taken from the manually-set options.
- May not repeat evenly; there may be a sliver on the right or bottom which is particularly noticeable when sawtooth repeat is used.
- Includes unused options in the self-documenting layer name, which may lead to unnecessary effort by someone duplicating settings manually from reading the layer name.
- Is not sufficiently commented in the code.

Version history:

Version 1.2 Corrected gradient name logic so that the script no longer would fail from being used in a non-English installation of GIMP.

Version 1.0. Developed from Four-Corner Gradient and Gradient-to-Gradient scripts-fu. If you find 2DG has too many options, you might try one of these other scripts-fu instead.

Acknowledgements:

I gratefully acknowledge forum assistance from GIMP registry members Saul Goode and bootchk for helping me to understand particularly thorny (to me) aspects of TinyScheme. In addition, the 2DG code includes a number-to-hex conversion subroutine from Saul Goode which I also used as a model for a hex-to-number conversion subroutine. This assistance and code help me significantly in my quest to provide self-documenting layer names and using the self-documentation feature to allow retrieving settings from an existing, currently active, 2DG layer. I also appreciate forum assistance from Rob A, now known as ffaat.

Website Window Creator Script

dln385 — Fri, 27 Mar 2009 21:21:05 +0100

This script creates a new image with a window useful for web design.

To install this script, copy it to your scripts folder, then restart Gimp. If you don't know where your scripts folder is, then go to Edit > Preferences > Folders > Scripts.

To run this script, select File > Create > Website Window.

Feedback is appreciated, and I will consider any changes that you request.

Four-corner gradient

Charles Belov — Fri, 27 Mar 2009 07:36:05 +0100

Version 2.4

This Script-Fu creates a completely new image having an RGB and/or HSV gradient in two directions - both horizontally and vertically - based on the colors you specify for the four corners. The layer name includes the parameters to support reproducibility.

Superceded as of 4/26/09 by 2-Dimensional Gradient.

Version 2.4: layer name color parameters shown in hex to facilitate copying into color widget. Thanks to Saul Goode for code that lets me enable this feature.
Version 2.2: layer name includes all parameters except width and height, to facilitate reproducibility.
Version 2.0: defaults to most efficient execution sequence; adds cycling.

Tip: Because the logic of this script involves processing one column or row at a time, you may want to test on a smaller image until you find a desirable gradient, then create a larger image using the same settings.

If you choose RGB for both directions or HSV for both directions, the sequence does not matter, so you might as well let the program choose the most efficient direction.

If you mix RGB in one direction with HSV in the other, the processing sequence - RGB first or HSV first - will affect the appearance of your resulting image. If you've mixed them, you may want to try forcing a particular sequence for applying the gradients.

Once you've saved this Script-Fu in your Script-Fu directory, you will find it filed under Filters > Render > Gradients > 4-corner Gradient 2.0...

Known issue: The script may occasionally quit with an error when setting the foreground color. Re-running the script with the same parameters seems to fix the problem.

Known issue: As of GIMP 2.6.6, the programming interface provided by GIMP does not support scripting control over HSV gradient directionality (clockwise vs. counter-clockwise hue). Therefore, the choice of the directionality of such gradients may appear arbitrary - and may even be arbitrary. Occasionally, you may find that certain uses of the HSV settings in the Four-corner gradient Script-Fu may result in two adjacent rows or columns of pixels following the opposite hue directionality. There is nothing to be done about this at this time except, if you find the resulting image not useful, to try other settings.

The image in my profile was created from Four-corner gradient version 2.0 Script-Fu with settings: 85 85 ff0000 00ff12 00bfff ffaf14 HSV No cycling RGB No cycling Left/right edges first.

Gradient-to-gradient Gradient

Charles Belov — Mon, 23 Mar 2009 06:12:03 +0100

Version 1.0.2

This script-fu creates a completely new image having an RGB and/or HSV gradient vertically between any two GIMP gradient patterns.

Note that this script-fu has a repeating loop, so the wider you make this image, the longer the script will take to run.

Find in Filters > Render > Gradients > Gradient to gradient...

Superceded as of 4/26/09 by 2-Dimensional Gradient.

Water reflection displacement map generator

Lucidlook — Mon, 26 Jan 2009 18:50:14 +0100

Builds displacement map to produce realistic water-like 3D reflection effect. Based on idea from Photoshop Tutorial: Displacement Water

Version 1.2
Changes:

1. Additional control over parameters:
- 3D correction
- Initial noise level
2. Option to decompose result into two layers image (separate X and Y)
3. Minor changes and optimization (i.e. now called "Water reflection map")

Please see tutorial with step-by-step instructions and images here.