Migrate examples (#4920)

* Migrate cpu-hello-world to new slang API

    Migrate cpu-hello-world to new slang API, and also convert this example
    as one of the unit test.

* Add 'shader-object' to slang-unit-test

* Convert ray-tracing example into unit-test

    Convert ray-tracing example into unit-test

* Fix some replay bugs:
  - Wrong decode type in 'getEntryPointHostCallable'.
  - Mistakes in computing the output buffer size.
  - Wrong decode type in array size in specialize() call.
  - When capture entrypoint, we should increase the reference count
     for the allocated entrypoint recorder object, because that is
     allocated by record layer, it should be owned by the layer, user
     should not be able to free it.
  - Improve json consumer on the prelude text.

* Test verify change:
In our test, we add a "callIdx" string at beginning of the hash-code
string, as there could be more than one modules in the example, so they
could call 'getEntryPointHash' multiple times, in order for the test
can identify them, add "callIdx: <number>" as the key word.

3 files changed, 15 insertions, 13 deletions

diff --git a/examples/example-base/example-base.cpp b/examples/example-base/example-base.cpp
index fb11105f5..344611bed 100644
--- a/examples/example-base/example-base.cpp
+++ b/examples/example-base/example-base.cpp
@@ -34,6 +34,16 @@ Slang::Result WindowedAppBase::initializeBase(
 
     windowWidth = width;
     windowHeight = height;
+
+    IFramebufferLayout::TargetLayout renderTargetLayout = {gfx::Format::R8G8B8A8_UNORM, 1};
+    IFramebufferLayout::TargetLayout depthLayout = {gfx::Format::D32_FLOAT, 1};
+    IFramebufferLayout::Desc framebufferLayoutDesc;
+    framebufferLayoutDesc.renderTargetCount = 1;
+    framebufferLayoutDesc.renderTargets = &renderTargetLayout;
+    framebufferLayoutDesc.depthStencil = &depthLayout;
+    SLANG_RETURN_ON_FAIL(
+        gDevice->createFramebufferLayout(framebufferLayoutDesc, gFramebufferLayout.writeRef()));
+
     // Do not create swapchain and windows in test mode, because there won't be any display.
     if (!isTestMode())
     {
@@ -64,17 +74,7 @@ Slang::Result WindowedAppBase::initializeBase(
         gSwapchain = gDevice->createSwapchain(swapchainDesc, windowHandle);
         createSwapchainFramebuffers();
     }
-
-    IFramebufferLayout::TargetLayout renderTargetLayout = {gfx::Format::R8G8B8A8_UNORM, 1};
-    IFramebufferLayout::TargetLayout depthLayout = {gfx::Format::D32_FLOAT, 1};
-    IFramebufferLayout::Desc framebufferLayoutDesc;
-    framebufferLayoutDesc.renderTargetCount = 1;
-    framebufferLayoutDesc.renderTargets = &renderTargetLayout;
-    framebufferLayoutDesc.depthStencil = &depthLayout;
-    SLANG_RETURN_ON_FAIL(
-        gDevice->createFramebufferLayout(framebufferLayoutDesc, gFramebufferLayout.writeRef()));
-
-    if (isTestMode())
+    else
     {
         createOfflineFramebuffers();
     }
diff --git a/examples/example-base/test-base.cpp b/examples/example-base/test-base.cpp
index 5c727aabe..0e0f8a69c 100644
--- a/examples/example-base/test-base.cpp
+++ b/examples/example-base/test-base.cpp
@@ -37,7 +37,8 @@ void TestBase::printEntrypointHashes(int entryPointCount, int targetCount, ComPt
             composedProgram->getEntryPointHash(entryPointIndex, targetIndex, entryPointHashBlob.writeRef());
 
             Slang::StringBuilder strBuilder;
-            strBuilder << "entrypoint: "<< entryPointIndex << ", target: " << targetIndex << ", hash: ";
+            strBuilder << "callIdx: " << m_globalCounter << ", entrypoint: "<< entryPointIndex << ", target: " << targetIndex << ", hash: ";
+            m_globalCounter++;
 
             uint8_t* buffer = (uint8_t*)entryPointHashBlob->getBufferPointer();
             for (size_t i = 0; i < entryPointHashBlob->getBufferSize(); i++)
diff --git a/examples/example-base/test-base.h b/examples/example-base/test-base.h
index 22cd70d09..cdd72c580 100644
--- a/examples/example-base/test-base.h
+++ b/examples/example-base/test-base.h
@@ -17,5 +17,6 @@ public:
     bool isTestMode() const { return m_isTestMode; }
 
 private:
-    bool m_isTestMode = false;
+    bool        m_isTestMode = false;
+    uint64_t    m_globalCounter = 0;
 };