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October 9, 2017 02:32
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Create PNG and allow download from browser [HTML canvas]
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| // Rudá Moura <[email protected]> | |
| window.onload = function() { | |
| createPNG('png1', 'red'); | |
| createPNG('png2', 'blue'); | |
| createPNG('png3', 'green'); | |
| createPNG('png4', 'turquoise'); | |
| } | |
| function createPNG(name, color) { | |
| var a = document.querySelector('a#' + name); | |
| var canvas = document.querySelector('canvas#' + name); | |
| var ctx = canvas.getContext('2d'); | |
| ctx.fillStyle = color; | |
| ctx.fillRect(0, 0, 128, 128); | |
| canvas.onclick = function(event) { | |
| var dataURL = canvas.toDataURL(); | |
| a.href = dataURL; | |
| //a.href = dataURL.replace(/^data:image\/[^;]/, 'data:application/octet-stream'); | |
| a.download = color + ".png"; | |
| } | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src=createpng.js></script> | |
| </head> | |
| <body> | |
| <a id="png1" href=""><canvas id="png1" width=128 height=128></canvas></a> | |
| <a id="png2" href=""><canvas id="png2" width=128 height=128></canvas></a> | |
| <a id="png3" href=""><canvas id="png3" width=128 height=128></canvas></a> | |
| <a id="png4" href=""><canvas id="png4" width=128 height=128></canvas></a> | |
| </body> | |
| </html> |
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