fix(2d): fix buffer update error

Author: singlecoder

packages/core/src/RenderPipeline/BatchUtils.ts

@@ -61,6 +61,6 @@ export class BatchUtils {
     }
     chunk.updateIndexLength += length;
     chunk.updateVertexStart = Math.min(chunk.updateVertexStart, start);
-    chunk.updateVertexLength = Math.max(chunk.updateVertexLength, start + size);
+    chunk.updateVertexEnd = Math.max(chunk.updateVertexEnd, start + size);
   }
 }

packages/core/src/RenderPipeline/PrimitiveChunk.ts

@@ -14,8 +14,8 @@ import {
   VertexElementFormat
 } from "../graphic";
 import { ReturnableObjectPool } from "../utils/ReturnableObjectPool";
-import { VertexArea } from "./VertexArea";
 import { SubPrimitiveChunk } from "./SubPrimitiveChunk";
+import { VertexArea } from "./VertexArea";
 
 /**
  * @internal
@@ -30,7 +30,7 @@ export class PrimitiveChunk {
   indices: Uint16Array;
 
   updateVertexStart = Number.MAX_SAFE_INTEGER;
-  updateVertexLength = Number.MIN_SAFE_INTEGER;
+  updateVertexEnd = Number.MIN_SAFE_INTEGER;
   updateIndexLength = 0;
 
   vertexFreeAreas: Array<VertexArea>;
@@ -90,18 +90,18 @@ export class PrimitiveChunk {
   uploadBuffer(): void {
     // Set data option use Discard, or will resulted in performance slowdown when open antialias and cross-rendering of 3D and 2D elements.
     // Device: iphone X(16.7.2)、iphone 15 pro max(17.1.1)、iphone XR(17.1.2) etc.
-    const { primitive, updateVertexStart, updateVertexLength } = this;
-    if (updateVertexStart !== Number.MAX_SAFE_INTEGER && updateVertexLength !== Number.MIN_SAFE_INTEGER) {
+    const { primitive, updateVertexStart, updateVertexEnd } = this;
+    if (updateVertexStart !== Number.MAX_SAFE_INTEGER && updateVertexEnd !== Number.MIN_SAFE_INTEGER) {
       primitive.vertexBufferBindings[0].buffer.setData(
         this.vertices,
         updateVertexStart * 4,
         updateVertexStart,
-        updateVertexLength,
+        updateVertexEnd - updateVertexStart,
         SetDataOptions.Discard
       );
 
       this.updateVertexStart = Number.MAX_SAFE_INTEGER;
-      this.updateVertexLength = Number.MIN_SAFE_INTEGER;
+      this.updateVertexEnd = Number.MIN_SAFE_INTEGER;
     }
 
     primitive.indexBufferBinding.buffer.setData(this.indices, 0, 0, this.updateIndexLength, SetDataOptions.Discard);