Draw call tests for Vulkan (#2073)

* Added instancing support to Vulkan, drawInstanced() test image is upside-down

* Fixed inverted drawInstanced() test output by changing Vulkan viewport convention

* Replaced vkCmdDraw with vkCmdDrawIndexed in all non-indirect indexed draws, drawIndexedIndirect test now working for Vulkan

* Moved index and vertex buffer binding into setIndexBuffer and setVertexBuffers; Defaulted countBuffer to nullptr and countOffset to 0 and added a check for non-null countBuffer to drawIndirect and drawIndexedIndirect in Vulkan; All Vulkan draw tests working (but D3D12 tests broken)

* Added support for drawInstanced and drawIndexedInstanced to D3D11 and added tests for both, however D3D11 tests are currently disabled due to readTextureResource assuming a fixed pixel size (among other possible problems); Fixed issues causing D3D12 tests to fail after major back-end fixes to get Vulkan up and running

* Removed testing function for dumping images and some other commented out code

* Removed some commented out code

* Fix initializer list causing builds to fail (attempt 1)

* Removed initializer list for VertexStreamDesc in createInputLayout() and fill in struct fields normally (build fix attempt 2)

* Removed default values from VertexStreamDesc and changed all initializer lists to reflect this change

* Moved applyBinding before setVertexBuffer in RenderTestApp::renderFrame() to ensure the pipeline has already been bound before vertex buffers are

* Changed D3D11's readTextureResource to calculate pixel size using format-specific size information; Removed wrapper around D3D11 instanced and indexed instanced draw tests

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/platform/gui.cpp b/tools/platform/gui.cpp
index 5b72bd087..5f7992abd 100644
--- a/tools/platform/gui.cpp
+++ b/tools/platform/gui.cpp
@@ -107,6 +107,7 @@ GUI::GUI(
         {"U", 2, Format::R8G8B8A8_UNORM,  offsetof(ImDrawVert, col) },
     };
     auto inputLayout = device->createInputLayout(
+        sizeof(ImDrawVert),
         &inputElements[0],
         SLANG_COUNT_OF(inputElements));
 
@@ -287,7 +288,7 @@ void GUI::endFrame(ITransientResourceHeap* transientHeap, IFramebuffer* framebuf
 
     renderEncoder->bindPipeline(pipelineState);
 
-    renderEncoder->setVertexBuffer(0, vertexBuffer, sizeof(ImDrawVert));
+    renderEncoder->setVertexBuffer(0, vertexBuffer);
     renderEncoder->setIndexBuffer(
         indexBuffer, sizeof(ImDrawIdx) == 2 ? Format::R16_UINT : Format::R32_UINT);
     renderEncoder->setPrimitiveTopology(PrimitiveTopology::TriangleList);
@@ -319,7 +320,7 @@ void GUI::endFrame(ITransientResourceHeap* transientHeap, IFramebuffer* framebuf
 
                 // TODO: set parameter into root shader object.
                 
-                renderEncoder->drawIndexed(command->ElemCount, indexOffset, vertexOffset);
+                renderEncoder->drawIndexed(command->ElemCount, (uint32_t)indexOffset, (uint32_t)vertexOffset);
             }
             indexOffset += command->ElemCount;
         }