1 files changed, 66 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/api/operation/resource_init/check_texture/by_copy.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/api/operation/resource_init/check_texture/by_copy.ts
new file mode 100644
index 0000000000..8f835e0f85
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/api/operation/resource_init/check_texture/by_copy.ts
@@ -0,0 +1,66 @@
+import { assert } from '../../../../../common/util/util.js';
+import { EncodableTextureFormat, kTextureFormatInfo } from '../../../../capability_info.js';
+import { virtualMipSize } from '../../../../util/texture/base.js';
+import { CheckContents } from '../texture_zero.spec.js';
+
+export const checkContentsByBufferCopy: CheckContents = (
+  t,
+  params,
+  texture,
+  state,
+  subresourceRange
+) => {
+  for (const { level: mipLevel, layer } of subresourceRange.each()) {
+    assert(params.format in kTextureFormatInfo);
+    const format = params.format as EncodableTextureFormat;
+
+    t.expectSingleColor(texture, format, {
+      size: [t.textureWidth, t.textureHeight, t.textureDepth],
+      dimension: params.dimension,
+      slice: layer,
+      layout: { mipLevel, aspect: params.aspect },
+      exp: t.stateToTexelComponents[state],
+    });
+  }
+};
+
+export const checkContentsByTextureCopy: CheckContents = (
+  t,
+  params,
+  texture,
+  state,
+  subresourceRange
+) => {
+  for (const { level, layer } of subresourceRange.each()) {
+    assert(params.format in kTextureFormatInfo);
+    const format = params.format as EncodableTextureFormat;
+
+    const [width, height, depth] = virtualMipSize(
+      params.dimension,
+      [t.textureWidth, t.textureHeight, t.textureDepth],
+      level
+    );
+
+    const dst = t.device.createTexture({
+      dimension: params.dimension,
+      size: [width, height, depth],
+      format: params.format,
+      usage: GPUTextureUsage.COPY_DST | GPUTextureUsage.COPY_SRC,
+    });
+    t.trackForCleanup(dst);
+
+    const commandEncoder = t.device.createCommandEncoder();
+    commandEncoder.copyTextureToTexture(
+      { texture, mipLevel: level, origin: { x: 0, y: 0, z: layer } },
+      { texture: dst, mipLevel: 0 },
+      { width, height, depthOrArrayLayers: depth }
+    );
+    t.queue.submit([commandEncoder.finish()]);
+
+    t.expectSingleColor(dst, format, {
+      size: [width, height, depth],
+      exp: t.stateToTexelComponents[state],
+      layout: { mipLevel: 0, aspect: params.aspect },
+    });
+  }
+};