Insert some casts for WGSL texture attribute queries (#5560)

* Add new texture sampling test for WebGPU

There are no 1d array textures in WGSL, so
add texture-sampling-no-1d-arrays.slang based on texture-sampling.slang, but without
1d texture arrays.

This helps to address issue #4943.

* Insert needed conversion when querying texture attributes in WGSL

This helps to address issue #4943.

---------

Co-authored-by: Yong He <yonghe@outlook.com>

2 files changed, 123 insertions, 0 deletions

diff --git a/tests/compute/texture-sampling-no-1d-arrays.slang b/tests/compute/texture-sampling-no-1d-arrays.slang
new file mode 100644
index 000000000..ed982ef70
--- /dev/null
+++ b/tests/compute/texture-sampling-no-1d-arrays.slang
@@ -0,0 +1,118 @@
+//TEST(compute):COMPARE_RENDER_COMPUTE: -shaderobj -output-using-type
+//TEST(compute):COMPARE_RENDER_COMPUTE: -shaderobj -output-using-type -vk
+//TEST(compute):COMPARE_RENDER_COMPUTE: -shaderobj -output-using-type -mtl
+
+
+//TEST_INPUT: Texture1D(size=4, content = one):name=t1D
+//TEST_INPUT: Texture2D(size=4, content = one):name=t2D
+//TEST_INPUT: Texture3D(size=4, content = one):name=t3D
+//TEST_INPUT: TextureCube(size=4, content = one):name=tCube
+//TEST_INPUT: Texture2D(size=4, content = one, arrayLength=2):name=t2dArray
+//TEST_INPUT: TextureCube(size=4, content = one, arrayLength=2):name=tCubeArray
+//TEST_INPUT: Sampler:name=samplerState
+//TEST_INPUT: ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+
+// There are still some issues to fix in RHI, see issue #4943
+//DISABLE_TEST(compute):COMPARE_COMPUTE:-slang -shaderobj -wgpu
+
+Texture1D t1D;
+Texture2D t2D;
+Texture3D t3D;
+TextureCube tCube;
+Texture2DArray t2dArray;
+TextureCubeArray tCubeArray;
+SamplerState samplerState;
+RWStructuredBuffer<float> outputBuffer;
+
+cbuffer Uniforms
+{
+	float4x4 modelViewProjection;
+}
+
+struct AssembledVertex
+{
+	float3	position;
+	float3	color;
+    float2  uv;
+};
+
+struct CoarseVertex
+{
+	float3	color;
+    float2  uv;
+};
+
+struct Fragment
+{
+	float4 color;
+};
+
+
+// Vertex  Shader
+
+struct VertexStageInput
+{
+	AssembledVertex assembledVertex	: A;
+};
+
+struct VertexStageOutput
+{
+	CoarseVertex	coarseVertex	: CoarseVertex;
+	float4			sv_position		: SV_Position;
+};
+
+VertexStageOutput vertexMain(VertexStageInput input)
+{
+	VertexStageOutput output;
+
+	float3 position = input.assembledVertex.position;
+	float3 color	= input.assembledVertex.color;
+
+	output.coarseVertex.color = color;
+	output.sv_position = mul(modelViewProjection, float4(position, 1.0));
+    output.coarseVertex.uv = input.assembledVertex.uv;
+	return output;
+}
+
+// Fragment Shader
+
+struct FragmentStageInput
+{
+	CoarseVertex	coarseVertex	: CoarseVertex;
+};
+
+struct FragmentStageOutput
+{
+	Fragment fragment	: SV_Target;
+};
+
+FragmentStageOutput fragmentMain(FragmentStageInput input)
+{
+	FragmentStageOutput output;
+
+	float3 color = input.coarseVertex.color;
+    float2 uv = input.coarseVertex.uv;
+	output.fragment.color = float4(color, 1.0);
+
+    float4 val = 0.0;
+    val += t1D.Sample(samplerState, uv.x);
+    val += t2D.Sample(samplerState, uv);
+    val += t3D.Sample (samplerState, float3(uv, 0.5));
+    
+    val += t2dArray.Sample(samplerState, float3(uv, 0.0));
+    
+    val += tCubeArray.Sample(samplerState, float4(uv, 0.5, 0.0));
+    val += tCube.Sample(samplerState, float3(uv, 0.5));
+
+    val += t2D.Load(int3(0));
+    val += t2dArray.Load(int4(0));
+
+    val += t3D[int3(0)];
+
+    outputBuffer[0] = val.x;
+
+    int w, h, l, lods;
+    t2dArray.GetDimensions(0, w, h, l, lods);
+    outputBuffer[1] = w + h + l + lods;
+	return output;
+}
diff --git a/tests/compute/texture-sampling-no-1d-arrays.slang.expected.txt b/tests/compute/texture-sampling-no-1d-arrays.slang.expected.txt
new file mode 100644
index 000000000..279fd69f2
--- /dev/null
+++ b/tests/compute/texture-sampling-no-1d-arrays.slang.expected.txt
@@ -0,0 +1,5 @@
+type: float
+9.000000
+13.000000
+0.000000
+0.000000