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Fix zero-sized canvas errors

main
Isaiah Odhner 2018-06-18 15:53:59 -04:00
parent d2eb35ed82
commit 5669a07fe3
1 changed files with 6 additions and 1 deletions
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7
src/image-manipulation.js
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@ -757,6 +757,10 @@ function draw_quadratic_curve(ctx, start_x, start_y, control_x, control_y, end_x
var numPoints = points.length; var numPoints = points.length;
var numCoords = numPoints * 2 var numCoords = numPoints * 2
if(numPoints === 0){
return;
}
var x_min = +Infinity; var x_min = +Infinity;
var x_max = -Infinity; var x_max = -Infinity;
var y_min = +Infinity; var y_min = +Infinity;
@ -838,7 +842,8 @@ function draw_quadratic_curve(ctx, start_x, start_y, control_x, control_y, end_x
window.copy_contents_within_polygon = function(canvas, points, x_min, y_min, x_max, y_max){ window.copy_contents_within_polygon = function(canvas, points, x_min, y_min, x_max, y_max){
// Copy the contents of the given canvas within the polygon given by points bounded by x/y_min/max // Copy the contents of the given canvas within the polygon given by points bounded by x/y_min/max
x_max = Math.max(x_max, x_min + 1);
y_max = Math.max(y_max, y_min + 1);
var width = x_max - x_min; var width = x_max - x_min;
var height = y_max - y_min; var height = y_max - y_min;