Add slang example tests to CI (#5879)

* Examples: Don't proceed if 'initializeBase' fails

* Examples: Only access gWindow if it's been initialized

* Examples: Free memory from CommandLineToArgvW

* Add example run step to CI

Lots of examples are still unexpectedly failing, but is one small step towards addressing
issue #5520.

8 files changed, 51 insertions, 23 deletions

diff --git a/examples/autodiff-texture/main.cpp b/examples/autodiff-texture/main.cpp
index 647929e70..d0c35d003 100644
--- a/examples/autodiff-texture/main.cpp
+++ b/examples/autodiff-texture/main.cpp
@@ -285,7 +285,7 @@ struct AutoDiffTexture : public WindowedAppBase
     }
     Slang::Result initialize()
     {
-        initializeBase("autodiff-texture", 1024, 768);
+        SLANG_RETURN_ON_FAIL(initializeBase("autodiff-texture", 1024, 768));
         srand(20421);
 
         if (!isTestMode())
diff --git a/examples/example-base/test-base.cpp b/examples/example-base/test-base.cpp
index 5d40f2d80..bfbfd6b15 100644
--- a/examples/example-base/test-base.cpp
+++ b/examples/example-base/test-base.cpp
@@ -27,6 +27,11 @@ int TestBase::parseOption(int argc, char** argv)
             m_isTestMode = true;
         }
     }
+
+#ifdef _WIN32
+    LocalFree(szArglist);
+#endif
+
     return 0;
 }
 
diff --git a/examples/model-viewer/main.cpp b/examples/model-viewer/main.cpp
index 8b75381be..ecca818f1 100644
--- a/examples/model-viewer/main.cpp
+++ b/examples/model-viewer/main.cpp
@@ -745,7 +745,7 @@ struct ModelViewer : WindowedAppBase
     //
     Result initialize()
     {
-        initializeBase("Model Viewer", 1024, 768);
+        SLANG_RETURN_ON_FAIL(initializeBase("Model Viewer", 1024, 768));
         if (!isTestMode())
         {
             gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e)
diff --git a/examples/platform-test/main.cpp b/examples/platform-test/main.cpp
index 373c15e09..159e26c55 100644
--- a/examples/platform-test/main.cpp
+++ b/examples/platform-test/main.cpp
@@ -71,18 +71,26 @@ struct PlatformTest : public WindowedAppBase
 
     Slang::Result initialize()
     {
-        initializeBase("platform-test", 1024, 768);
-
-        gWindow->events.sizeChanged = [this]() { onSizeChanged(); };
-        gWindow->events.focus = [this]() { onFocus(); };
-        gWindow->events.lostFocus = [this]() { onLostFocus(); };
-        gWindow->events.keyDown = [this](const platform::KeyEventArgs& e) { onKeyDown(e); };
-        gWindow->events.keyUp = [this](const platform::KeyEventArgs& e) { onKeyUp(e); };
-        gWindow->events.keyPress = [this](const platform::KeyEventArgs& e) { onKeyPress(e); };
-        gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e) { onMouseMove(e); };
-        gWindow->events.mouseDown = [this](const platform::MouseEventArgs& e) { onMouseDown(e); };
-        gWindow->events.mouseUp = [this](const platform::MouseEventArgs& e) { onMouseUp(e); };
-        gWindow->events.mouseWheel = [this](const platform::MouseEventArgs& e) { onMouseWheel(e); };
+        SLANG_RETURN_ON_FAIL(initializeBase("platform-test", 1024, 768));
+
+        // We may not have a window if we're running in test mode
+        SLANG_ASSERT(isTestMode() || gWindow);
+        if (gWindow)
+        {
+            gWindow->events.sizeChanged = [this]() { onSizeChanged(); };
+            gWindow->events.focus = [this]() { onFocus(); };
+            gWindow->events.lostFocus = [this]() { onLostFocus(); };
+            gWindow->events.keyDown = [this](const platform::KeyEventArgs& e) { onKeyDown(e); };
+            gWindow->events.keyUp = [this](const platform::KeyEventArgs& e) { onKeyUp(e); };
+            gWindow->events.keyPress = [this](const platform::KeyEventArgs& e) { onKeyPress(e); };
+            gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e)
+            { onMouseMove(e); };
+            gWindow->events.mouseDown = [this](const platform::MouseEventArgs& e)
+            { onMouseDown(e); };
+            gWindow->events.mouseUp = [this](const platform::MouseEventArgs& e) { onMouseUp(e); };
+            gWindow->events.mouseWheel = [this](const platform::MouseEventArgs& e)
+            { onMouseWheel(e); };
+        }
 
         return SLANG_OK;
     }
@@ -105,7 +113,10 @@ struct PlatformTest : public WindowedAppBase
         commandBuffer->close();
         gQueue->executeCommandBuffer(commandBuffer);
 
-        gSwapchain->present();
+        // We may not have a swapchain if we're running in test mode
+        SLANG_ASSERT(isTestMode() || gSwapchain);
+        if (gSwapchain)
+            gSwapchain->present();
     }
 };
 
diff --git a/examples/ray-tracing-pipeline/main.cpp b/examples/ray-tracing-pipeline/main.cpp
index 1e55c7eb1..0fbb857f0 100644
--- a/examples/ray-tracing-pipeline/main.cpp
+++ b/examples/ray-tracing-pipeline/main.cpp
@@ -298,7 +298,7 @@ struct RayTracing : public WindowedAppBase
 
     Slang::Result initialize()
     {
-        initializeBase("Ray Tracing Pipeline", 1024, 768);
+        SLANG_RETURN_ON_FAIL(initializeBase("Ray Tracing Pipeline", 1024, 768));
         if (!isTestMode())
         {
             gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e)
diff --git a/examples/ray-tracing/main.cpp b/examples/ray-tracing/main.cpp
index 7878550f8..11529a753 100644
--- a/examples/ray-tracing/main.cpp
+++ b/examples/ray-tracing/main.cpp
@@ -289,7 +289,7 @@ struct RayTracing : public WindowedAppBase
 
     Slang::Result initialize()
     {
-        initializeBase("Ray Tracing", 1024, 768);
+        SLANG_RETURN_ON_FAIL(initializeBase("Ray Tracing", 1024, 768));
 
         if (!isTestMode())
         {
diff --git a/examples/shader-toy/main.cpp b/examples/shader-toy/main.cpp
index 1ab85c0b2..185d18246 100644
--- a/examples/shader-toy/main.cpp
+++ b/examples/shader-toy/main.cpp
@@ -282,10 +282,18 @@ struct ShaderToyApp : public WindowedAppBase
 
     Result initialize()
     {
-        initializeBase("Shader Toy", 1024, 768);
-        gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e) { handleEvent(e); };
-        gWindow->events.mouseUp = [this](const platform::MouseEventArgs& e) { handleEvent(e); };
-        gWindow->events.mouseDown = [this](const platform::MouseEventArgs& e) { handleEvent(e); };
+        SLANG_RETURN_ON_FAIL(initializeBase("Shader Toy", 1024, 768));
+
+        // We may not have a window if we're running in test mode
+        SLANG_ASSERT(isTestMode() || gWindow);
+        if (gWindow)
+        {
+            gWindow->events.mouseMove = [this](const platform::MouseEventArgs& e)
+            { handleEvent(e); };
+            gWindow->events.mouseUp = [this](const platform::MouseEventArgs& e) { handleEvent(e); };
+            gWindow->events.mouseDown = [this](const platform::MouseEventArgs& e)
+            { handleEvent(e); };
+        }
 
         InputElementDesc inputElements[] = {
             {"POSITION", 0, Format::R32G32_FLOAT, offsetof(FullScreenTriangle::Vertex, position)},
@@ -383,7 +391,11 @@ struct ShaderToyApp : public WindowedAppBase
         commandBuffer->close();
 
         gQueue->executeCommandBuffer(commandBuffer);
-        gSwapchain->present();
+
+        // We may not have a swapchain if we're running in test mode
+        SLANG_ASSERT(isTestMode() || gSwapchain);
+        if (gSwapchain)
+            gSwapchain->present();
     }
 
     void handleEvent(const platform::MouseEventArgs& event)
diff --git a/examples/triangle/main.cpp b/examples/triangle/main.cpp
index e77f488cc..f757b59c7 100644
--- a/examples/triangle/main.cpp
+++ b/examples/triangle/main.cpp
@@ -223,7 +223,7 @@ struct HelloWorld : public WindowedAppBase
     {
         // Create a window for our application to render into.
         //
-        initializeBase("hello-world", 1024, 768);
+        SLANG_RETURN_ON_FAIL(initializeBase("hello-world", 1024, 768));
 
         // We will create objects needed to configur the "input assembler"
         // (IA) stage of the D3D pipeline.