Add operation tests for transient attachment usage

Author: beaufortfrancois

src/webgpu/api/operation/command_buffer/copyTextureToTexture.spec.ts

@@ -1528,10 +1528,13 @@ g.test('copy_multisampled_depth')
   `
   )
   .params(u =>
-    u.combine('format', kDepthStencilFormats).filter(t => isDepthTextureFormat(t.format))
+    u
+      .combine('format', kDepthStencilFormats)
+      .combine('transientAttachment', [false, true])
+      .filter(t => isDepthTextureFormat(t.format))
   )
   .fn(t => {
-    const { format } = t.params;
+    const { format, transientAttachment } = t.params;
 
     t.skipIf(t.isCompatibility, 'multisample textures are not copyable in compatibility mode');
     t.skipIfTextureFormatNotSupported(format);
@@ -1645,7 +1648,9 @@ g.test('copy_multisampled_depth')
     const multisampledColorTexture = t.createTextureTracked({
       format: kColorFormat,
       size: textureSize,
-      usage: GPUTextureUsage.COPY_SRC | GPUTextureUsage.RENDER_ATTACHMENT,
+      usage: transientAttachment
+        ? GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.TRANSIENT_ATTACHMENT
+        : GPUTextureUsage.RENDER_ATTACHMENT,
       sampleCount: kSampleCount,
     });
     const colorTextureAsResolveTarget = t.createTextureTracked({

src/webgpu/api/operation/render_pass/resolve.spec.ts

@@ -39,6 +39,9 @@ Test basic render pass resolve behavior for combinations of:
     u
       .combine('separateResolvePass', [false, true])
       .combine('storeOperation', ['discard', 'store'] as const)
+      .combine('transientAttachment', [false, true])
+      // Exclude if transient AND (separate pass OR storing)
+      .unless(t => t.transientAttachment && (t.separateResolvePass || t.storeOperation === 'store'))
       .beginSubcases()
       .combine('numColorAttachments', [2, 4] as const)
       .combine('slotsToResolve', kSlotsToResolve)
@@ -114,8 +117,9 @@ Test basic render pass resolve behavior for combinations of:
           size: [kSize, kSize, 1],
           sampleCount: 4,
           mipLevelCount: 1,
-          usage:
-            GPUTextureUsage.COPY_DST | GPUTextureUsage.COPY_SRC | GPUTextureUsage.RENDER_ATTACHMENT,
+          usage: t.params.transientAttachment
+            ? GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.TRANSIENT_ATTACHMENT
+            : GPUTextureUsage.RENDER_ATTACHMENT,
         })
         .createView();