Adopt binding plan for builtin object-id pass

tests/Rendering/unit/test_builtin_forward_pipeline.cpp

@@ -120,6 +120,46 @@ TEST(BuiltinForwardPipeline_Test, BuildsBuiltinPassResourceBindingPlanFromLegacy
     EXPECT_EQ(plan.linearClampSampler.set, 4u);
 }
 
+TEST(BuiltinObjectIdPass_Test, BuiltinObjectIdShaderDeclaresExplicitPerObjectResourceContract) {
+    ShaderLoader loader;
+    LoadResult result = loader.Load(GetBuiltinObjectIdShaderPath());
+    ASSERT_TRUE(result);
+    ASSERT_NE(result.resource, nullptr);
+
+    Shader* shader = static_cast<Shader*>(result.resource);
+    ASSERT_NE(shader, nullptr);
+
+    const ShaderPass* pass = shader->FindPass("ObjectId");
+    ASSERT_NE(pass, nullptr);
+    ASSERT_EQ(pass->resources.Size(), 1u);
+
+    EXPECT_EQ(pass->resources[0].semantic, "PerObject");
+    EXPECT_EQ(pass->resources[0].type, ShaderResourceType::ConstantBuffer);
+    EXPECT_EQ(pass->resources[0].set, 0u);
+    EXPECT_EQ(pass->resources[0].binding, 0u);
+
+    delete shader;
+}
+
+TEST(BuiltinObjectIdPass_Test, BuildsBuiltinPassResourceBindingPlanFromLegacyFallbackResources) {
+    const Array<ShaderResourceBindingDesc> bindings = BuildLegacyBuiltinObjectIdPassResourceBindings();
+    ASSERT_EQ(bindings.Size(), 1u);
+
+    BuiltinPassResourceBindingPlan plan = {};
+    String error;
+    EXPECT_TRUE(TryBuildBuiltinPassResourceBindingPlan(bindings, plan, &error)) << error.CStr();
+    ASSERT_EQ(plan.bindings.Size(), 1u);
+    EXPECT_TRUE(plan.perObject.IsValid());
+    EXPECT_FALSE(plan.material.IsValid());
+    EXPECT_FALSE(plan.baseColorTexture.IsValid());
+    EXPECT_FALSE(plan.linearClampSampler.IsValid());
+    EXPECT_EQ(plan.firstDescriptorSet, 0u);
+    EXPECT_EQ(plan.descriptorSetCount, 1u);
+    EXPECT_TRUE(plan.usesConstantBuffers);
+    EXPECT_FALSE(plan.usesTextures);
+    EXPECT_FALSE(plan.usesSamplers);
+}
+
 TEST(BuiltinObjectIdPass_Test, UsesFloat3PositionInputLayoutForStaticMeshVertices) {
     const InputLayoutDesc inputLayout = BuiltinObjectIdPass::BuildInputLayout();