T.Herker t16h05008
t16h05008
/ trim_canvas.js
Last active
March 20, 2022 22:58
— forked from timdown/trim_canvas.js
Forked from: https://gist.github.com/timdown/021d9c8f2aabc7092df564996f5afbbf Returns a copy of a canvas element with surrounding transparent space removed. Added the option to add padding to the new canvas as a second parameter.
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| var trimCanvas = (function() { | |
| function rowBlank(imageData, width, y) { | |
| for (var x = 0; x < width; ++x) { | |
| if (imageData.data[y * width * 4 + x * 4 + 3] !== 0) return false; | |
| } | |
| return true; | |
| } | |
| function columnBlank(imageData, width, x, top, bottom) { | |
| for (var y = top; y < bottom; ++y) { |