refactor(srp): add depth-aware managed fullscreen raster graph bridge

managed/XCEngine.ScriptCore/Rendering/Graph/RenderGraphRasterPassBuilder.cs

@@ -18,9 +18,12 @@ namespace XCEngine.Rendering
         private readonly string m_passName;
         private readonly List<RenderGraphTextureHandle> m_readTextures =
             new List<RenderGraphTextureHandle>();
+        private readonly List<RenderGraphTextureHandle> m_readDepthTextures =
+            new List<RenderGraphTextureHandle>();
         private readonly List<RenderGraphTextureHandle> m_colorAttachments =
             new List<RenderGraphTextureHandle>();
         private RenderGraphTextureHandle m_sourceColorTexture;
+        private RenderGraphTextureHandle m_depthAttachment;
         private Vector4 m_vectorPayload;
         private string m_shaderPath = string.Empty;
         private string m_shaderPassName = string.Empty;
@@ -79,6 +82,17 @@ namespace XCEngine.Rendering
             return this;
         }
 
+        public RenderGraphRasterPassBuilder UseDepthTexture(
+            RenderGraphTextureHandle texture)
+        {
+            if (texture.isValid)
+            {
+                m_readDepthTextures.Add(texture);
+            }
+
+            return this;
+        }
+
         public RenderGraphRasterPassBuilder SetColorAttachment(
             RenderGraphTextureHandle texture,
             int index = 0)
@@ -99,6 +113,13 @@ namespace XCEngine.Rendering
             return this;
         }
 
+        public RenderGraphRasterPassBuilder SetDepthAttachment(
+            RenderGraphTextureHandle texture)
+        {
+            m_depthAttachment = texture;
+            return this;
+        }
+
         public RenderGraphRasterPassBuilder
         SetColorScaleFullscreenExecution(
             Vector4 colorScale)
@@ -184,6 +205,25 @@ namespace XCEngine.Rendering
                 }
             }
 
+            for (int i = 0; i < m_readDepthTextures.Count; ++i)
+            {
+                RenderGraphTextureHandle readDepthTexture =
+                    m_readDepthTextures[i];
+                if (!readDepthTexture.isValid)
+                {
+                    continue;
+                }
+
+                if (!InternalCalls
+                        .Rendering_ScriptableRenderContext_AddRasterPassReadDepthTexture(
+                            m_context.nativeHandle,
+                            nativePassHandle,
+                            readDepthTexture.nativeIndex))
+                {
+                    return false;
+                }
+            }
+
             for (int i = 0; i < m_colorAttachments.Count; ++i)
             {
                 RenderGraphTextureHandle colorAttachment =
@@ -204,6 +244,16 @@ namespace XCEngine.Rendering
                 }
             }
 
+            if (m_depthAttachment.isValid &&
+                !InternalCalls
+                    .Rendering_ScriptableRenderContext_SetRasterPassDepthAttachment(
+                        m_context.nativeHandle,
+                        nativePassHandle,
+                        m_depthAttachment.nativeIndex))
+            {
+                return false;
+            }
+
             bool configuredExecution;
             switch (m_executionKind)
             {