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This can never happen, as of now, but add safety check

main
Isaiah Odhner 2021-09-01 11:35:29 -04:00
parent f5c7a11f40
commit 3ffd28ae6d
1 changed files with 4 additions and 1 deletions
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5
src/image-manipulation.js
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@ -377,7 +377,10 @@ function draw_fill(ctx, start_x, start_y, swatch) {
}
}
function draw_fill_separately(source_ctx, dest_ctx, start_x, start_y, fill_r, fill_g, fill_b, fill_a){
function draw_fill_separately(source_ctx, dest_ctx, start_x, start_y, fill_r, fill_g, fill_b, fill_a) {
if (fill_a === 0) {
throw new Error("Filling with alpha of zero is not supported. Zero alpha is used for detecting whether a pixel has been visited.");
}
const c_width = main_canvas.width;
const c_height = main_canvas.height;
start_x = Math.max(0, Math.min(Math.floor(start_x), c_width));