gfx: Add tests for instanced, indexed instanced, and indirect draw calls (#2060)

* Implemented instancing for the drawInstanced test and confirmed that test values taken at specific pixel location match expected values

* Removed writeImage() helper function as this is for debugging only

* Factored out shared test code and wrapped tests inside a base class with derived structs for each individual draw call variant; Added a test for indexed, instanced draws but test is currently not working correctly

* Indexed instancing test finish and working; Further refactor to move code that fills the test result array and creates the vertex and color buffers to the base test class

* Commented out image dump helper function at the top as it may still be needed for the remaining draw tests

* Added a new struct derived from the base test class for testing indirect but non-indexed draws; Moved required command signatures for indirect draws into D3D12Device to ensure they continue to exist outside of their respective draw calls; Moved command signature creation into D3D12Device::initialize(); Small consistency cleanup changes

* Added working indexed indirect draw call test

* Moved expectedResult and compareComputeResult() call into getTestResults() and renamed to checkTestResults()

* Rerun tests

1 files changed, 9 insertions, 4 deletions

diff --git a/tools/gfx-unit-test/gfx-test-util.cpp b/tools/gfx-unit-test/gfx-test-util.cpp
index 619d2feb0..7514f22cf 100644
--- a/tools/gfx-unit-test/gfx-test-util.cpp
+++ b/tools/gfx-unit-test/gfx-test-util.cpp
@@ -150,6 +150,14 @@ namespace gfx_test
         SLANG_CHECK(memcmp(resultBlob->getBufferPointer(), expectedResult, expectedBufferSize) == 0);
     }
 
+    void compareComputeResultFuzzy(const float* result, float* expectedResult, size_t expectedBufferSize)
+    {
+        for (int i = 0; i < expectedBufferSize / sizeof(float); ++i)
+        {
+            SLANG_CHECK(abs(result[i] - expectedResult[i]) <= 0.01);
+        }
+    }
+
     void compareComputeResultFuzzy(gfx::IDevice* device, gfx::IBufferResource* buffer, float* expectedResult, size_t expectedBufferSize)
     {
         // Read back the results.
@@ -159,10 +167,7 @@ namespace gfx_test
         SLANG_CHECK(resultBlob->getBufferSize() == expectedBufferSize);
         // Compare results with a tolerance of 0.01.
         auto result = (float*)resultBlob->getBufferPointer();
-        for (int i = 0; i < expectedBufferSize / sizeof(float); ++i)
-        {
-            SLANG_CHECK(abs(result[i] - expectedResult[i]) <= 0.01);
-        }
+        compareComputeResultFuzzy(result, expectedResult, expectedBufferSize);
     }
 
     Slang::ComPtr<gfx::IDevice> createTestingDevice(UnitTestContext* context, Slang::RenderApiFlag::Enum api)