Description:

djangowatermarkremastered 0.1.8

overrided from origin

django-watermark
This project provides a simple way for you to apply custom watermarks
to images on your django-powered website.
Authored by Josh VanderLinden, and some great
contributors.





Features

Opacity: the filter allows you to specify the transparency level for your
watermark image
Watermark positioning: you have several options for positioning watermarks on
your images

Absolute: you can specify exact pixel locations for your watermark
Relative: you can use percentages to place your watermark
Corners: you can position your watermark in the corners of your images
Random: you can tell the filter to randomly generate a position for your
watermark
Center: you can place watermarks in the center of the target image


Scaling: the watermark can be scaled to cover your images or specify a
scaling factor to use
Tiling: the watermark can be tiled across your images
Greyscale: you can convert the watermark to be greyscale before having it
applied to the target image.
Rotation: you can rotate your watermark a certain number of degrees or have
the rotation be random.



Requirements
django-watermark relies upon the Python Imaging Library.
It was tested with latest Pillow, PIL 1.1.7 is supported but not recommended.


Installation
Either clone this repository into your project, or install with pip install django-watermark
First of all, you must add this project to your list of INSTALLED_APPS in
settings.py :
INSTALLED_APPS = (
...
'watermarker',
)
Run ./manage.py syncdb. This creates the tables in your database
that are necessary for operation.
Please see example application. This application is used to manually
test the functionalities of this package. This also serves as a good
example.
You need Django 1.4 or above to run that. It might run on older
versions but that is not tested.

Upgrading from 0.1.6
Upgrading from 0.1.6 is likely to cause problems trying to apply a
migration when the tables already exist. In this case a fake migration
needs to be applied:
./manage.py migrate watermarker 0001 --fake



Configuration (optional)
While we’re in this section, I might as well mention a settings
variable that you can override: WATERMARK_QUALITY. This should
be an integer between 0 and 100. The default is 85.
By default, django-watermark obscures the original image’s file
name, as the original requirements were to make it impossible to
download the watermark-less image. As of version 0.1.6, you can set
WATERMARK_OBSCURE_ORIGINAL to False in your setings.py to
make the original image file name accessible to the user.
django-watermark also lets you configure how random watermark
positioning should work. By default, a when a watermark is to be
positioned randomly, only one watermarked image will be generated. If
you wish to generate a random position for an image’s watermark on
each request, set WATERMARK_RANDOM_POSITION_ONCE to False in
your settings.py.


Usage
As mentioned above, you have several options when using django-watermark.
The first thing you must do is load the filter for the template in which you
wish to apply watermarks to your images.
{% load watermark %}
From the Django admin, go ahead and populate your database with some watermarks
that you want to apply to your regular images. Simply specify a name for the
watermark and upload the watermark image itself. It’s probably not a good
idea to put commas in your watermark names. Watermarks should be transparent
PNG files for best results. I can’t make any guarantees that other formats
will work nicely.
The first parameter to the watermark filter _must_ be the name you
specified for the watermark in the Django admin. You can then choose from a
few other parameters to customize the application of the watermark. Here they
are:

position - This one is quite customizable. First, you can plug your
watermark into one corner of your images by using one of BR, BL,
TR, and TL. These represent ‘bottom-right’, ‘bottom-left’,
‘top-right’, and ‘top-left’ respectively.
Alternatively, you can use relative or absolute positioning for the
watermark. Relative positioning uses percentages; absolute positioning uses
exact pixels. You can mix and match these two modes of positioning, but you
cannot mix and match relative/absolute with the corner positioning. When
using relative/absolute positioning, the value for the position parameter
is XxY, where X is the left value and Y is the top value. The
left and top values must be separated with a lowercase x.
If you wanted your watermark image to show up in the center of any image you
want to watermark, you would use a position parameter such as
position=50%x50% or even position=C. If you wanted the watermark to
show up half-way between the left and right edges of the image and 100 pixels
from the top, you would use a position parameter such as
position=50%x100.
Finally, you may tell the filter to generate a position for your watermark
dynamically. To do this, use position=R.

opacity - This parameter allows you to specify the transparency of the
applied watermark. The value must be an integer between 0 and 100, where 0
is fully transparent and 100 is fully opaque. By default, the opacity is set
at 50%.
tile - If you want your watermark to tile across the entire image, you
simply specify a parameter such as tile=1.
scale - If you’d like to have the watermark as big as possible on the
target image and fully visible, you might want to use scale=F. When you
want your watermark size corresponding to a percentage of source image, use
scale=R and define in your settings something like
WATERMARK_PERCENTAGE=40. The default percentage value is 30. If you
want to specify a particular scaling factor, just use something like
scale=1.43.
greyscale - If you want your watermark to be greyscale, you can specify
the parameter greyscale=1 and all color saturation will go away.
rotation - Set this parameter to any integer between 0 and 359 (really
any integer should work, but for your own sanity I recommend keeping the
value between 0 and 359). If you want the rotation to be random, use
rotation=R instead of an integer.
obscure - Set this parameter to 0 to make the original image’s filename
visible to the user. Default is 1 (or True) to obscure the original
filename.
quality - Set this to an integer between 0 and 100 to specify the quality
of the resulting image. Default is 85.
random_position_once - Set this to 0 or 1 to specify the random
positioning behavior for the image’s watermark. When set to 0, the watermark
will be randomly placed on each request. When set to 1, the watermark will
be positioned randomly on the first request, and subsequent requests will use
the produced image. Default is True (random positioning only happens on
first request).


Examples

{{ image_url|watermark:"My Watermark,position=br,opacity=35" }}
Looks for a watermark named “My Watermark”, place it in the bottom-right
corner of the target image, using a 35% transparency level.

{{ image_url|watermark:"Your Watermark,position=tl,opacity=75" }}
Looks for a watermark named “Your Watermark”, place it in the top-left corner
of the target image, using a 75% transparency level.

{{ image_url|watermark:"The Watermark,position=43%x80%,opacity=40" }}
Looks for a watermark named “The Watermark”, places it at 43% on the x-axis
and 80% of the y-axis of the target image, at a transparency level of 40%.

{{ image_url|watermark:"The Watermark,position=R,opacity=10,rotation=45" }}
Looks for a watermark named “The Watermark”, randomly generates a position
for it, at a transparency level of 10%, rotated 45 degrees.

{{ image_url|watermark:"w00t,opacity=40,tile=1" }}
Looks for a watermark called “w00t”, tiles it across the entire target image,
at a transparency level of 40%.





Credits
I didn’t write any of the code that actually applies the watermark. I snagged
it from http://code.activestate.com/recipes/362879/ and turned it into a Django
pluggable application. Props to Shane Hathaway.


License
django-watermark is released under the BSD license.

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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