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author | Starfall <root@starfall.blue> | 2019-12-09 19:07:33 -0600 |
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committer | Starfall <root@starfall.blue> | 2019-12-09 19:09:31 -0600 |
commit | 6b34fcfef7566105e8d80ab5fee0a539c06cddbf (patch) | |
tree | 8fad2d47bf8be255d3c671c40cbfd04c2f55ed03 /app/javascript/flavours/glitch/util/resize_image.js | |
parent | 9fbb4af7611aa7836e65ef9f544d341423c15685 (diff) | |
parent | 246addd5b33a172600342af3fb6fb5e4c80ad95e (diff) |
Merge branch 'glitch'`
Diffstat (limited to 'app/javascript/flavours/glitch/util/resize_image.js')
-rw-r--r-- | app/javascript/flavours/glitch/util/resize_image.js | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/util/resize_image.js b/app/javascript/flavours/glitch/util/resize_image.js index bbdbc865e..d566edb03 100644 --- a/app/javascript/flavours/glitch/util/resize_image.js +++ b/app/javascript/flavours/glitch/util/resize_image.js @@ -67,6 +67,14 @@ const processImage = (img, { width, height, orientation, type = 'image/png' }) = context.drawImage(img, 0, 0, width, height); + // The Tor Browser and maybe other browsers may prevent reading from canvas + // and return an all-white image instead. Assume reading failed if the resized + // image is perfectly white. + const imageData = context.getImageData(0, 0, width, height); + if (imageData.data.every(value => value === 255)) { + throw 'Failed to read from canvas'; + } + canvas.toBlob(resolve, type); }); |