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Top Forums Shell Programming and Scripting accepting images as a list and changing the name Post 302630321 by subway69 on Wednesday 25th of April 2012 05:31:18 PM
Old 04-25-2012
accepting images as a list and changing the name

Here is what I have so far

Code:
#!/bin/bash

while [ $# -gt 0 ]
do
        read image
        jpegtopnm $image | pnmscale -height 200 | pnmtojpeg > $image-thumb
        echo $image-thumb
        shift
done

I sorta threw some pseudocode in there to demonstrate what I'm trying to do. . Where I am stuck is, I am trying to read in a list of images. The while/do works fine but I get confused as to how to represent all the images in the list as a single item such as '$image' because I need to scale all of them and them spit them back out on the command line with new names by adding -thumb to their names. Also I'm trying to make it JPG specific meaning if the list gets a .html file for example by accident it should skip over it. My biggest problem is I dont know how to represent a list of items as a single variable if that is the right word. Any help just to get started in the right direction is appreciated. . thank you

---------- Post updated at 04:31 PM ---------- Previous update was at 04:29 PM ----------

edit here is an update to what I have changed

Code:
#!/bin/bash

for img in *.jpg
do

        jpegtopnm $img | pnmscale -height 200 | pnmtojpeg > $img-thumb
        echo $img
        shift
done

 

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IMAGEARC(3)								 1							       IMAGEARC(3)

imagearc - Draws an arc

SYNOPSIS
bool imagearc (resource $image, int $cx, int $cy, int $width, int $height, int $start, int $end, int $color) DESCRIPTION
imagearc(3) draws an arc of circle centered at the given coordinates. PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $cx - x-coordinate of the center. o $cy - y-coordinate of the center. o $width - The arc width. o $height - The arc height. o $start - The arc start angle, in degrees. o $end - The arc end angle, in degrees. 0o is located at the three-o'clock position, and the arc is drawn clockwise. o $color - A color identifier created with imagecolorallocate(3). RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Drawing a circle with imagearc(3) <?php // create a 200*200 image $img = imagecreatetruecolor(200, 200); // allocate some colors $white = imagecolorallocate($img, 255, 255, 255); $red = imagecolorallocate($img, 255, 0, 0); $green = imagecolorallocate($img, 0, 255, 0); $blue = imagecolorallocate($img, 0, 0, 255); // draw the head imagearc($img, 100, 100, 200, 200, 0, 360, $white); // mouth imagearc($img, 100, 100, 150, 150, 25, 155, $red); // left and then the right eye imagearc($img, 60, 75, 50, 50, 0, 360, $green); imagearc($img, 140, 75, 50, 50, 0, 360, $blue); // output image in the browser header("Content-type: image/png"); imagepng($img); // free memory imagedestroy($img); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : Drawing a circle with imagearc() SEE ALSO
imagefilledarc(3), imageellipse(3), imagefilledellipse(3). PHP Documentation Group IMAGEARC(3)
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