CDSS-daming-web/node_modules/zrender/lib/canvas/helper.js

export function createLinearGradient(ctx, obj, rect) {
    var x = obj.x == null ? 0 : obj.x;
    var x2 = obj.x2 == null ? 1 : obj.x2;
    var y = obj.y == null ? 0 : obj.y;
    var y2 = obj.y2 == null ? 0 : obj.y2;
    if (!obj.global) {
        x = x * rect.width + rect.x;
        x2 = x2 * rect.width + rect.x;
        y = y * rect.height + rect.y;
        y2 = y2 * rect.height + rect.y;
    }
    x = isNaN(x) ? 0 : x;
    x2 = isNaN(x2) ? 1 : x2;
    y = isNaN(y) ? 0 : y;
    y2 = isNaN(y2) ? 0 : y2;
    var canvasGradient = ctx.createLinearGradient(x, y, x2, y2);
    return canvasGradient;
}
export function createRadialGradient(ctx, obj, rect) {
    var width = rect.width;
    var height = rect.height;
    var min = Math.min(width, height);
    var x = obj.x == null ? 0.5 : obj.x;
    var y = obj.y == null ? 0.5 : obj.y;
    var r = obj.r == null ? 0.5 : obj.r;
    if (!obj.global) {
        x = x * width + rect.x;
        y = y * height + rect.y;
        r = r * min;
    }
    var canvasGradient = ctx.createRadialGradient(x, y, 0, x, y, r);
    return canvasGradient;
}
export function getCanvasGradient(ctx, obj, rect) {
    var canvasGradient = obj.type === 'radial'
        ? createRadialGradient(ctx, obj, rect)
        : createLinearGradient(ctx, obj, rect);
    var colorStops = obj.colorStops;
    for (var i = 0; i < colorStops.length; i++) {
        canvasGradient.addColorStop(colorStops[i].offset, colorStops[i].color);
    }
    return canvasGradient;
}
export function isClipPathChanged(clipPaths, prevClipPaths) {
    if (clipPaths === prevClipPaths || (!clipPaths && !prevClipPaths)) {
        return false;
    }
    if (!clipPaths || !prevClipPaths || (clipPaths.length !== prevClipPaths.length)) {
        return true;
    }
    for (var i = 0; i < clipPaths.length; i++) {
        if (clipPaths[i] !== prevClipPaths[i]) {
            return true;
        }
    }
    return false;
}