逐步完成前后端服务器

frontend/node_modules/zrender/lib/graphic/helper/subPixelOptimize.js

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+var round = Math.round;
+export function subPixelOptimizeLine(outputShape, inputShape, style) {
+    if (!inputShape) {
+        return;
+    }
+    var x1 = inputShape.x1;
+    var x2 = inputShape.x2;
+    var y1 = inputShape.y1;
+    var y2 = inputShape.y2;
+    outputShape.x1 = x1;
+    outputShape.x2 = x2;
+    outputShape.y1 = y1;
+    outputShape.y2 = y2;
+    var lineWidth = style && style.lineWidth;
+    if (!lineWidth) {
+        return outputShape;
+    }
+    if (round(x1 * 2) === round(x2 * 2)) {
+        outputShape.x1 = outputShape.x2 = subPixelOptimize(x1, lineWidth, true);
+    }
+    if (round(y1 * 2) === round(y2 * 2)) {
+        outputShape.y1 = outputShape.y2 = subPixelOptimize(y1, lineWidth, true);
+    }
+    return outputShape;
+}
+export function subPixelOptimizeRect(outputShape, inputShape, style) {
+    if (!inputShape) {
+        return;
+    }
+    var originX = inputShape.x;
+    var originY = inputShape.y;
+    var originWidth = inputShape.width;
+    var originHeight = inputShape.height;
+    outputShape.x = originX;
+    outputShape.y = originY;
+    outputShape.width = originWidth;
+    outputShape.height = originHeight;
+    var lineWidth = style && style.lineWidth;
+    if (!lineWidth) {
+        return outputShape;
+    }
+    outputShape.x = subPixelOptimize(originX, lineWidth, true);
+    outputShape.y = subPixelOptimize(originY, lineWidth, true);
+    outputShape.width = Math.max(subPixelOptimize(originX + originWidth, lineWidth, false) - outputShape.x, originWidth === 0 ? 0 : 1);
+    outputShape.height = Math.max(subPixelOptimize(originY + originHeight, lineWidth, false) - outputShape.y, originHeight === 0 ? 0 : 1);
+    return outputShape;
+}
+export function subPixelOptimize(position, lineWidth, positiveOrNegative) {
+    if (!lineWidth) {
+        return position;
+    }
+    var doubledPosition = round(position * 2);
+    return (doubledPosition + round(lineWidth)) % 2 === 0
+        ? doubledPosition / 2
+        : (doubledPosition + (positiveOrNegative ? 1 : -1)) / 2;
+}