WebGPURenderer: Move TexelCopyTextureInfo into its own module.

The wrapper class for `GPUTexelCopyTextureInfo` is a standalone helper — move
it out of `WebGPUTextureUtils.js` (which is about texture management) into
`src/renderers/webgpu/utils/TexelCopyTextureInfo.js`, matching three.js's
"one class per file" convention. No behavior change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: RenaudRohlinger

src/renderers/webgpu/WebGPUBackend.js

@@ -12,7 +12,8 @@ import WebGPUAttributeUtils from './utils/WebGPUAttributeUtils.js';
 import WebGPUBindingUtils from './utils/WebGPUBindingUtils.js';
 import WebGPUCapabilities from './utils/WebGPUCapabilities.js';
 import WebGPUPipelineUtils from './utils/WebGPUPipelineUtils.js';
-import WebGPUTextureUtils, { TexelCopyTextureInfo } from './utils/WebGPUTextureUtils.js';
+import WebGPUTextureUtils from './utils/WebGPUTextureUtils.js';
+import TexelCopyTextureInfo from './utils/TexelCopyTextureInfo.js';
 
 import { WebGPUCoordinateSystem, TimestampQuery, REVISION, HalfFloatType, Compatibility } from '../../constants.js';
 import WebGPUTimestampQueryPool from './utils/WebGPUTimestampQueryPool.js';

src/renderers/webgpu/utils/TexelCopyTextureInfo.js

@@ -0,0 +1,93 @@
+/**
+ * Reusable wrapper around `GPUTexelCopyTextureInfo`. Mutates in place to avoid
+ * per-frame GC pressure while keeping call sites readable via chainable setters.
+ *
+ * @private
+ */
+class TexelCopyTextureInfo {
+
+	/**
+	 * Constructs a new texel-copy texture info.
+	 */
+	constructor() {
+
+		/**
+		 * The source/destination GPU texture.
+		 *
+		 * @type {?GPUTexture}
+		 * @default null
+		 */
+		this.texture = null;
+
+		/**
+		 * The mip level of the texture to copy from/to.
+		 *
+		 * @type {number}
+		 * @default 0
+		 */
+		this.mipLevel = 0;
+
+		/**
+		 * The origin of the copy within the texture.
+		 *
+		 * @type {{x: number, y: number, z: number}}
+		 */
+		this.origin = { x: 0, y: 0, z: 0 };
+
+	}
+
+	/**
+	 * Sets the texture.
+	 *
+	 * @param {GPUTexture} texture - The GPU texture.
+	 * @return {TexelCopyTextureInfo} A reference to this instance.
+	 */
+	setTexture( texture ) {
+
+		this.texture = texture;
+		return this;
+
+	}
+
+	/**
+	 * Sets the mip level.
+	 *
+	 * @param {number} mipLevel - The mip level.
+	 * @return {TexelCopyTextureInfo} A reference to this instance.
+	 */
+	setMipLevel( mipLevel ) {
+
+		this.mipLevel = mipLevel;
+		return this;
+
+	}
+
+	/**
+	 * Sets the origin of the copy.
+	 *
+	 * @param {number} x - The x coordinate.
+	 * @param {number} y - The y coordinate.
+	 * @param {number} z - The z coordinate.
+	 * @return {TexelCopyTextureInfo} A reference to this instance.
+	 */
+	setOrigin( x, y, z ) {
+
+		this.origin.x = x;
+		this.origin.y = y;
+		this.origin.z = z;
+		return this;
+
+	}
+
+	/**
+	 * Clears the texture reference so the scratch doesn't retain a GPU object across frames.
+	 */
+	reset() {
+
+		this.texture = null;
+
+	}
+
+}
+
+export default TexelCopyTextureInfo;

src/renderers/webgpu/utils/WebGPUTextureUtils.js

@@ -35,51 +35,6 @@ const _compareToWebGPU = {
 
 const _flipMap = [ 0, 1, 3, 2, 4, 5 ];
 
-/**
- * Reusable wrapper around `GPUTexelCopyTextureInfo`. Mutates in place to avoid
- * per-frame GC pressure while keeping call sites readable via chainable setters.
- */
-class TexelCopyTextureInfo {
-
-	constructor() {
-
-		this.texture = null;
-		this.mipLevel = 0;
-		this.origin = { x: 0, y: 0, z: 0 };
-
-	}
-
-	setTexture( texture ) {
-
-		this.texture = texture;
-		return this;
-
-	}
-
-	setMipLevel( mipLevel ) {
-
-		this.mipLevel = mipLevel;
-		return this;
-
-	}
-
-	setOrigin( x, y, z ) {
-
-		this.origin.x = x;
-		this.origin.y = y;
-		this.origin.z = z;
-		return this;
-
-	}
-
-	reset() {
-
-		this.texture = null;
-
-	}
-
-}
-
 /**
  * A WebGPU backend utility module for managing textures.
  *
@@ -1715,5 +1670,4 @@ export function getFormat( texture, device ) {
 
 }
 
-export { TexelCopyTextureInfo };
 export default WebGPUTextureUtils;