Backends: WebGPU: Avoid leaking pipeline layout. (#7245)

backends/imgui_impl_wgpu.cpp

@@ -18,6 +18,7 @@
 // (minor and older changes stripped away, please see git history for details)
 //  2024-01-22: Added configurable PipelineMultisampleState struct. (#7240)
 //  2024-01-22: (Breaking) ImGui_ImplWGPU_Init() now takes a ImGui_ImplWGPU_InitInfo structure instead of variety of parameters, allowing for easier further changes.
+//  2024-01-22: Fixed pipeline layout leak. (#7245)
 //  2024-01-17: Explicitly fill all of WGPUDepthStencilState since standard removed defaults.
 //  2023-07-13: Use WGPUShaderModuleWGSLDescriptor's code instead of source. use WGPUMipmapFilterMode_Linear instead of WGPUFilterMode_Linear. (#6602)
 //  2023-04-11: Align buffer sizes. Use WGSL shaders instead of precompiled SPIR-V.
@@ -183,6 +184,12 @@ static void SafeRelease(WGPUBuffer& res)
         wgpuBufferRelease(res);
     res = nullptr;
 }
+static void SafeRelease(WGPUPipelineLayout& res)
+{
+    if (res)
+        wgpuPipelineLayoutRelease(res);
+    res = nullptr;
+}
 static void SafeRelease(WGPURenderPipeline& res)
 {
     if (res)
@@ -692,6 +699,7 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
 
     SafeRelease(vertex_shader_desc.module);
     SafeRelease(pixel_shader_desc.module);
+    SafeRelease(graphics_pipeline_desc.layout);
     SafeRelease(bg_layouts[0]);
 
     return true;

docs/CHANGELOG.txt

@@ -63,6 +63,7 @@ Other changes:
 - Backends: WebGPU: Added ImGui_ImplWGPU_InitInfo::PipelineMultisampleState. (#7240)
 - Backends: WebGPU: Filling all WGPUDepthStencilState fields explicitly as a recent Dawn
   update stopped setting default values. (#7232) [@GrigoryGraborenko]
+- Backends: WebGPU: Fixed pipeline layout leak. (#7245) [@rajveermalviya]
 
 
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