Add render graph depth access semantics

tests/Rendering/unit/test_render_graph.cpp

@@ -279,6 +279,17 @@ RenderGraphTextureDesc BuildTestTextureDesc() {
     return desc;
 }
 
+RenderGraphTextureDesc BuildTestDepthTextureDesc() {
+    RenderGraphTextureDesc desc = {};
+    desc.width = 1024u;
+    desc.height = 1024u;
+    desc.format = static_cast<XCEngine::Core::uint32>(Format::D24_UNorm_S8_UInt);
+    desc.textureType = static_cast<XCEngine::Core::uint32>(TextureType::Texture2D);
+    desc.sampleCount = 1u;
+    desc.sampleQuality = 0u;
+    return desc;
+}
+
 } // namespace
 
 TEST(RenderGraph_Test, CompilesDeclaredPassOrderAndTracksTextureLifetimes) {
@@ -533,6 +544,36 @@ TEST(RenderGraph_Test, RejectsGraphOwnedImportedTextureWithoutView) {
     EXPECT_FALSE(errorMessage.Empty());
 }
 
+TEST(RenderGraph_Test, TracksDepthAttachmentTransitionPlan) {
+    RenderGraph graph;
+    RenderGraphBuilder builder(graph);
+
+    const RenderGraphTextureDesc depthDesc = BuildTestDepthTextureDesc();
+    const RenderGraphTextureHandle depthTexture =
+        builder.CreateTransientTexture("SceneDepth", depthDesc);
+
+    builder.AddRasterPass(
+        "DepthPrepass",
+        [&](RenderGraphPassBuilder& pass) {
+            pass.WriteDepthTexture(depthTexture);
+        });
+
+    CompiledRenderGraph compiledGraph;
+    XCEngine::Containers::String errorMessage;
+    ASSERT_TRUE(RenderGraphCompiler::Compile(graph, compiledGraph, &errorMessage))
+        << errorMessage.CStr();
+
+    RenderGraphTextureTransitionPlan transitionPlan = {};
+    ASSERT_TRUE(compiledGraph.TryGetTextureTransitionPlan(depthTexture, transitionPlan));
+    EXPECT_TRUE(transitionPlan.graphOwnsTransitions);
+    EXPECT_TRUE(transitionPlan.hasFirstAccessState);
+    EXPECT_TRUE(transitionPlan.hasLastAccessState);
+    EXPECT_EQ(transitionPlan.initialState, ResourceStates::Common);
+    EXPECT_EQ(transitionPlan.firstAccessState, ResourceStates::DepthWrite);
+    EXPECT_EQ(transitionPlan.lastAccessState, ResourceStates::DepthWrite);
+    EXPECT_EQ(transitionPlan.finalState, ResourceStates::DepthWrite);
+}
+
 TEST(RenderGraph_Test, ExecutesCompiledPassCallbacksInCompiledOrder) {
     RenderGraph graph;
     RenderGraphBuilder builder(graph);