WebGPURenderer: Prevent out of bounds `textureLoad` access in WGSL (#29470)

Co-authored-by: aardgoose <angus.sawyer@email.com>

src/renderers/webgpu/nodes/WGSLNodeBuilder.js

@@ -94,7 +94,8 @@ fn tsl_repeatWrapping( uv : vec2<f32>, dimension : vec2<u32> ) -> vec2<u32> {
 	biquadraticTexture: new CodeNode( `
 fn tsl_biquadraticTexture( map : texture_2d<f32>, coord : vec2f, level : i32 ) -> vec4f {
 
-	let res = vec2f( textureDimensions( map, level ) );
+	let iRes = vec2i( textureDimensions( map, level ) );
+	let res = vec2f( iRes );
 
 	let uvScaled = coord * res;
 	let uvWrapping = ( ( uvScaled % res ) + res ) % res;
@@ -105,10 +106,10 @@ fn tsl_biquadraticTexture( map : texture_2d<f32>, coord : vec2f, level : i32 ) -
 	let iuv = floor( uv );
 	let f = fract( uv );
 
-	let rg1 = textureLoad( map, vec2i( iuv + vec2( 0.5, 0.5 ) ), level );
-	let rg2 = textureLoad( map, vec2i( iuv + vec2( 1.5, 0.5 ) ), level );
-	let rg3 = textureLoad( map, vec2i( iuv + vec2( 0.5, 1.5 ) ), level );
-	let rg4 = textureLoad( map, vec2i( iuv + vec2( 1.5, 1.5 ) ), level );
+	let rg1 = textureLoad( map, vec2i( iuv + vec2( 0.5, 0.5 ) ) % iRes, level );
+	let rg2 = textureLoad( map, vec2i( iuv + vec2( 1.5, 0.5 ) ) % iRes, level );
+	let rg3 = textureLoad( map, vec2i( iuv + vec2( 0.5, 1.5 ) ) % iRes, level );
+	let rg4 = textureLoad( map, vec2i( iuv + vec2( 1.5, 1.5 ) ) % iRes, level );
 
 	return mix( mix( rg1, rg2, f.x ), mix( rg3, rg4, f.x ), f.y );