Colorize a photo with PHP/GD

Question

Let's say I have some original jpg image and I want to add red with 50% opacity over the image and display it on the page, how it's done with GD? Please just point me in the right direction, my googling and searching didn't give me much results, or maybe I don't know what I'm searching for because english isn't my 1st language.

Example from photoshop: enter image description here

yesss, thanks, that's what i'm searching for – Sunny Nov 29 '14 at 08:10 — Sunny, Nov 29 '14 at 08:10

score 2 · Accepted Answer · answered Nov 29 '14 at 08:13

2

Well, you could either draw a rectangle and

$red = imagecolorallocatealpha($image, 255, 0, 0, 63);

Or you could use the PHP Image filters,

imagefilter($image, IMG_FILTER_COLORIZE, 127, 0, 0);

// didn't test the color though

answered Nov 29 '14 at 08:13

argentum47

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`50` should be `127 / 2 = 63`? – mpyw Nov 29 '14 at 08:14
excellent, php is amazing – Sunny Nov 29 '14 at 08:16

Colorize a photo with PHP/GD

1 Answers1