Support for unfiltrable texture in WGSL (#7655)

* Support for unfiltrable texture in WGSL

* rename to make more obvious

---------

Co-authored-by: Martin Valigursky <mvaligursky@snapchat.com>

Author: mvaligursky

src/platform/graphics/webgpu/webgpu-shader-processor-wgsl.js

@@ -71,6 +71,9 @@ const getTextureInfo = (baseType, componentType) => {
             case 'u32': finalSampleType = SAMPLETYPE_UINT; break;
             case 'i32': finalSampleType = SAMPLETYPE_INT; break;
             case 'f32': finalSampleType = SAMPLETYPE_FLOAT; break;
+
+            // custom 'uff' type for unfilterable float, allowing us to create correct bind, which is automatically generated based on the shader
+            case 'uff': finalSampleType = SAMPLETYPE_UNFILTERABLE_FLOAT; break;
         }
     }
 

src/scene/immediate/immediate.js

@@ -174,7 +174,7 @@ class Immediate {
         `, /* wgsl */`
 
             varying uv0: vec2f;
-            var colorMap: texture_2d<f32>;
+            var colorMap: texture_2d<uff>;
             @fragment fn fragmentMain(input : FragmentInput) -> FragmentOutput {
                 var output: FragmentOutput;
                 let uv : vec2<i32> = vec2<i32>(input.uv0 * vec2f(textureDimensions(colorMap, 0)));