Remove resource `Usage` from `gfx` interface. (#1813)

* Fix `model-viewer` crash when using Vulkan.

Fixing an issue in shader object layout creation for to make sure a correct descriptor set layout is calculated for types that need an implicit constant buffer.

* Fix formatting.

* Fixes.

* Fix memory leak in vulkan.

* Remove resource `Usage` from `gfx` interface.

1 files changed, 20 insertions, 0 deletions

diff --git a/tools/gfx/resource-desc-utils.cpp b/tools/gfx/resource-desc-utils.cpp
new file mode 100644
index 000000000..93609cd0e
--- /dev/null
+++ b/tools/gfx/resource-desc-utils.cpp
@@ -0,0 +1,20 @@
+#include "resource-desc-utils.h"
+
+namespace gfx
+{
+IBufferResource::Desc fixupBufferDesc(const IBufferResource::Desc& desc)
+{
+    IBufferResource::Desc result = desc;
+    result.allowedStates.add(result.defaultState);
+    return result;
+}
+
+ITextureResource::Desc fixupTextureDesc(const ITextureResource::Desc& desc)
+{
+    ITextureResource::Desc rs = desc;
+    if (desc.numMipLevels == 0)
+        rs.numMipLevels = calcNumMipLevels(desc.type, desc.size);
+    rs.allowedStates.add(rs.defaultState);
+    return rs;
+}
+}