8503 wgsl depth texture (#8645)

Add built-in type aliases for DepthTexture* and unify Sampler*Shadow
    
Add the following type aliases:
- DepthTexture1D, DepthTexture1DArray
- DepthTexture2D, DepthTexture2DArray
- DepthTexture2DMS, DepthTexture2DMSArray
- DepthTexture3D
- DepthTextureCube, DepthTextureCubeArray
    
These match with the type aliases for non-depth textures.
    
Also, unify the Sampler*Shadow type aliases with DepthTexture*
ones. This adds the following:
    
- Sampler2DMSShadow
- Sampler2DMSArrayShadow
    
and removes the Sampler3DArrayShadow type alias. As a side-effect, the
descriptions of Sampler*ArrayShadow type aliases are fixed
("texture-sampler for shadow" ==> "texture-sampler array for shadow").

Update the slang tests to use the newly introduced type aliases instead
of
the custom type aliases that use _Texture<> directly.

Add DepthTexture testing in
hlsl-intrinsic/texture/texture-intrinsics. Do this by extracting the
test logic of computeMain() in a separate function and parametrize it
for non-depth/depth texture types. This adds basic coverage for the
following types:

- DepthTexture1D
- DepthTexture2D
- DepthTexture3D
- DepthTextureCube
- DepthTexture1DArray
- DepthTexture2DArray
- DepthTextureCubeArray

Issue #6166
Issue #8503

1 files changed, 4 insertions, 56 deletions

diff --git a/tests/wgsl/texture-gather.slang b/tests/wgsl/texture-gather.slang
index d0772994e..bb5851159 100644
--- a/tests/wgsl/texture-gather.slang
+++ b/tests/wgsl/texture-gather.slang
@@ -68,66 +68,14 @@ TextureCubeArray<uint4> tCubeArray_u32v4;
 
 // depth
 
-__generic<let sampleCount:int=0, let format:int=0>
-typealias Depth2D = _Texture<
-    float,
-    __Shape2D,
-    0, // isArray
-    0, // isMS
-    sampleCount,
-    0, // access
-    1, // isShadow
-    0, // isCombined
-    format
->;
-
-__generic<let sampleCount:int=0, let format:int=0>
-typealias Depth2DArray = _Texture<
-    float,
-    __Shape2D,
-    1, // isArray
-    0, // isMS
-    sampleCount,
-    0, // access
-    1, // isShadow
-    0, // isCombined
-    format
->;
-
-__generic<let sampleCount:int=0, let format:int=0>
-typealias DepthCube = _Texture<
-    float,
-    __ShapeCube,
-    0, // isArray
-    0, // isMS
-    sampleCount,
-    0, // access
-    1, // isShadow
-    0, // isCombined
-    format
->;
-
-__generic<let sampleCount:int=0, let format:int=0>
-typealias DepthCubeArray = _Texture<
-    float,
-    __ShapeCube,
-    1, // isArray
-    0, // isMS
-    sampleCount,
-    0, // access
-    1, // isShadow
-    0, // isCombined
-    format
->;
-
 //TEST_INPUT: Texture2D(size=4, content = zero):name d2D
-Depth2D d2D;
+DepthTexture2D d2D;
 //TEST_INPUT: TextureCube(size=4, content = zero):name dCube
-DepthCube dCube;
+DepthTextureCube dCube;
 //TEST_INPUT: Texture2D(size=4, content = zero, arrayLength=2):name d2DArray
-Depth2DArray d2DArray;
+DepthTexture2DArray d2DArray;
 //TEST_INPUT: TextureCube(size=4, content = zero, arrayLength=2):name dCubeArray
-DepthCubeArray dCubeArray;
+DepthTextureCubeArray dCubeArray;
 
 //TEST_INPUT: Sampler:name samplerState
 SamplerState samplerState;