Half texture support (#1836)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Split out StringEscapeUtil.

* Added StringEscapeUtil.

* Fix typo in unix quoting type.

* Small comment improvements.

* Try to fix linux linking issue.

* Fix typo.

* Attempt to fix linux link issue.

* Update VS proj even though nothing really changed.

* Fix another typo issue.

* Fix for windows issue.
Fixed bug.

* Make separate Utils for escaping.

* Fix typo.

* Split out into StringEscapeHandler.

* Windows shell does handle removing quotes (so remove code to remove them).

* Handle unescaping if not initiating using the shell.

* Slight improvement around shell like decoding.

* Simplify command extraction.

* Add shared-library category type.

* Fix bug in command extraction.

* Typo in transcendental category.

* Enable unit-test on in smoke test category.

* Make parsing failing output as a failing test.

* Fixes for transcendental tests. Disable tests that do not work.

* Changed category parsing.

* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.

* Remove testing if all tests were disabled.

* Make args of CommandLine always unescaped.

* Add category.

* Don't need escaping on unix/linux.

* Remove some no longer used functions.

* Add requireSMVersion to CUDAExtensionTracker.

* half-calc.slang now works for CUDA.

* bit-cast-16-bit works on CUDA.

* WIP handling of CUDA vector<half> types.

* Half swizzle CUDA.

* Half vector test.

* Fix swizzle half bug.

* Fix compilation issue with narrowing to Index.

* Add unary ops.

* Add some vector scalar maths ops.

* Add half vector conversions for CUDA.

* Fix erroneous comment.

* Support for half comparisons.

* First pass test for half compare.

* Fix bug in CUDA specialized emit control.
Updated tests to have pre and post inc/dec.

* Removed unneeded parts of the cuda prelude.

* Half structured buffer works on CUDA.

* Added name lookup for Gfx::Format

* Support half texture type in test system.

* Test for half reading on CUDA.

* Add half formats to Vk and D3D utils.

* Fix getAt for CUDA - where there might not be a .x member in a vector.

2 files changed, 57 insertions, 0 deletions

diff --git a/tests/compute/half-texture-simple.slang b/tests/compute/half-texture-simple.slang
new file mode 100644
index 000000000..1f775ec59
--- /dev/null
+++ b/tests/compute/half-texture-simple.slang
@@ -0,0 +1,53 @@
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute  -shaderobj
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12  -shaderobj
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12 -profile cs_6_0 -use-dxil -shaderobj
+// TODO(JS): Doesn't work on vk currently, because createTextureView not implemented on vk renderer
+//DISABLE_TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj
+//TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute  -shaderobj
+
+// Doesn't work on CUDA, not clear why yet
+//DISABLE_TEST_INPUT: Texture1D(format=R_Float16, size=4, content = one, mipMaps=1):name tLoad1D
+//Texture1D<float> tLoad1D;
+
+//TEST_INPUT: Texture1D(format=R_Float16, size=4, content = one):name t1D
+Texture1D<float> t1D;
+//TEST_INPUT: Texture2D(format=R_Float16, size=4, content = one):name t2D
+Texture2D<float> t2D;
+//TEST_INPUT: Texture3D(format=R_Float16, size=4, content = one):name t3D
+Texture3D<float> t3D;
+//TEST_INPUT: TextureCube(format=R_Float16, size=4, content = one):name tCube
+TextureCube<float> tCube;
+
+//TEST_INPUT: Texture1D(format=R_Float16, size=4, content = one, arrayLength=2):name t1DArray
+Texture1DArray<float> t1DArray;
+//TEST_INPUT: Texture2D(format=R_Float16, size=4, content = one, arrayLength=2):name t2DArray
+Texture2DArray<float> t2DArray;
+//TEST_INPUT: TextureCube(format=R_Float16, size=4, content = one, arrayLength=2):name tCubeArray
+TextureCubeArray<float> tCubeArray;
+
+//TEST_INPUT: Sampler:name samplerState
+SamplerState samplerState;
+
+//TEST_INPUT: ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int idx = dispatchThreadID.x;
+    float u = idx * (1.0f / 4);
+    
+    float val = 0.0f;
+   
+    val += t1D.SampleLevel(samplerState, u, 0); 
+    val += t2D.SampleLevel(samplerState, float2(u, u), 0);
+    val += t3D.SampleLevel(samplerState, float3(u, u, u), 0);
+    val += tCube.SampleLevel(samplerState, normalize(float3(u, 1 - u, u)), 0);
+ 
+    val += t1DArray.SampleLevel(samplerState, float2(u, 0), 0);
+    val += t2DArray.SampleLevel(samplerState, float3(u, u, 0), 0);
+    val += tCubeArray.SampleLevel(samplerState, float4(u, u, u, 0), 0);
+ 
+    outputBuffer[idx] = val;
+}
diff --git a/tests/compute/half-texture-simple.slang.expected.txt b/tests/compute/half-texture-simple.slang.expected.txt
new file mode 100644
index 000000000..cf6e7405a
--- /dev/null
+++ b/tests/compute/half-texture-simple.slang.expected.txt
@@ -0,0 +1,4 @@
+40E00000
+40E00000
+40E00000
+40E00000