Add DXC tests to SPIRVShaderResourcesTest (#736)

Author: hzqst

Tests/DiligentCoreTest/CMakeLists.txt

@@ -64,6 +64,10 @@ if(WEBGPU_SUPPORTED)
     target_link_libraries(DiligentCoreTest PRIVATE libtint)
 endif()
 
+if (PLATFORM_WIN32)
+    copy_shader_compiler_dlls(DiligentCoreTest DXCOMPILER_FOR_SPIRV YES)
+endif()
+
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${SOURCE} ${SHADERS}})
 
 set_target_properties(DiligentCoreTest

Tests/DiligentCoreTest/assets/shaders/SPIRV/MixedResources.psh

@@ -27,19 +27,16 @@ RWTexture2D<float4> StorageTex : register(u1);
 // Sampler
 SamplerState Sampler : register(s0);
 
-// Test for push constants
+// Test struct for push constants
 struct PushConstants_t
 {
     float2 Offset;
     float Time;
     uint FrameCount;
 };
 
-[[vk::push_constant]]
-cbuffer PushConstants
-{
-    PushConstants_t g_PushConstants;
-};
+//note that cbuffer PushConstants is not allowed in DXC, but ConstantBuffer<PushConstants_t> is allowed
+[[vk::push_constant]] ConstantBuffer<PushConstants_t> PushConstants;
 
 float4 main() : SV_Target
 {
@@ -59,8 +56,8 @@ float4 main() : SV_Target
     StorageTex[uint2(0, 0)] = color;
 
     // Use push constant data
-    color.xy += g_PushConstants.Offset;
-    color.rgb *= sin(g_PushConstants.Time) * 0.5 + 0.5;
+    color.xy += PushConstants.Offset;
+    color.rgb *= sin(PushConstants.Time) * 0.5 + 0.5;
 
     return color;
 }

Tests/DiligentCoreTest/assets/shaders/SPIRV/PushConstants.psh

@@ -1,4 +1,4 @@
-// Test for push constants
+// Test struct for push constants
 struct PushConstants_t
 {
     float4x4 g_MVPMatrix;
@@ -8,19 +8,16 @@ struct PushConstants_t
     uint     g_Padding;
 };
 
-[[vk::push_constant]]
-cbuffer PushConstants
-{
-    PushConstants_t g_PushConstants;
-};
+//note that cbuffer PushConstants is not allowed in DXC, but ConstantBuffer<PushConstants_t> is allowed
+[[vk::push_constant]] ConstantBuffer<PushConstants_t> PushConstants;
 
 float4 main() : SV_Target
 {
     // Use push constant data through the structure instance
-    float4 result = g_PushConstants.g_Color * g_PushConstants.g_Scale;
+    float4 result = PushConstants.g_Color * PushConstants.g_Scale;
 
     // Apply offset to result (simplified example)
-    result.xy += g_PushConstants.g_Offset;
+    result.xy += PushConstants.g_Offset;
 
     return result;
 }

Tests/DiligentCoreTest/assets/shaders/SPIRV/UniformBuffers.psh

@@ -1,8 +1,4 @@
 // Test for uniform buffers (constant buffers)
-cbuffer CB0 : register(b0)
-{
-    float4x4 g_WorldViewProj;
-};
 
 cbuffer CB1 : register(b1)
 {