Backends: Vulkan: Added ApiVersion field in ImGui_ImplVulkan_InitInfo. Dynamic rendering path loads "vkCmdBeginRendering/vkCmdEndRendering" without -KHR on API 1.3. (ocornut#8326, ocornut#8365)

Author: ocornut

backends/imgui_impl_vulkan.cpp

@@ -26,6 +26,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2025-02-13: Vulkan: Added ApiVersion field in ImGui_ImplVulkan_InitInfo. Default to header version if unspecified. Dynamic rendering path loads "vkCmdBeginRendering/vkCmdEndRendering" (without -KHR suffix) on API 1.3. (#8326)
 //  2025-01-09: Vulkan: Added IMGUI_IMPL_VULKAN_MINIMUM_IMAGE_SAMPLER_POOL_SIZE to clarify how many image sampler descriptors are expected to be available in descriptor pool. (#6642)
 //  2025-01-06: Vulkan: Added more ImGui_ImplVulkanH_XXXX helper functions to simplify our examples.
 //  2024-12-11: Vulkan: Fixed setting VkSwapchainCreateInfoKHR::preTransform for platforms not supporting VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR. (#8222)
@@ -1082,9 +1083,11 @@ void    ImGui_ImplVulkan_DestroyDeviceObjects()
 #ifdef IMGUI_IMPL_VULKAN_HAS_DYNAMIC_RENDERING
 static void ImGui_ImplVulkan_LoadDynamicRenderingFunctions(PFN_vkVoidFunction(*loader_func)(const char* function_name, void* user_data), void* user_data)
 {
-    // Manually load those two (see #5446)
-    ImGuiImplVulkanFuncs_vkCmdBeginRenderingKHR = reinterpret_cast<PFN_vkCmdBeginRenderingKHR>(loader_func("vkCmdBeginRenderingKHR", user_data));
-    ImGuiImplVulkanFuncs_vkCmdEndRenderingKHR = reinterpret_cast<PFN_vkCmdEndRenderingKHR>(loader_func("vkCmdEndRenderingKHR", user_data));
+    // Manually load those two (see #5446, #8326, #8365)
+    ImGui_ImplVulkan_Data* bd = ImGui_ImplVulkan_GetBackendData();
+    ImGui_ImplVulkan_InitInfo* v = &bd->VulkanInitInfo;
+    ImGuiImplVulkanFuncs_vkCmdBeginRenderingKHR = reinterpret_cast<PFN_vkCmdBeginRenderingKHR>(loader_func(v->ApiVersion < VK_API_VERSION_1_3 ? "vkCmdBeginRenderingKHR" : "vkCmdBeginRendering", user_data));
+    ImGuiImplVulkanFuncs_vkCmdEndRenderingKHR = reinterpret_cast<PFN_vkCmdEndRenderingKHR>(loader_func(v->ApiVersion < VK_API_VERSION_1_3 ? "vkCmdEndRenderingKHR" : "vkCmdEndRendering", user_data));
 }
 #endif
 
@@ -1155,6 +1158,8 @@ bool    ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info)
         IM_ASSERT(info->RenderPass != VK_NULL_HANDLE);
 
     bd->VulkanInitInfo = *info;
+    if (bd->VulkanInitInfo.ApiVersion == 0)
+        bd->VulkanInitInfo.ApiVersion = VK_HEADER_VERSION_COMPLETE;
 
     ImGui_ImplVulkan_CreateDeviceObjects();
 

backends/imgui_impl_vulkan.h

@@ -75,16 +75,17 @@
 //   - When using dynamic rendering, set UseDynamicRendering=true and fill PipelineRenderingCreateInfo structure.
 struct ImGui_ImplVulkan_InitInfo
 {
+    uint32_t                        ApiVersion;                 // Fill with API version of Instance, e.g. VK_API_VERSION_1_3, which might be lower than header version (VK_HEADER_VERSION_COMPLETE)
     VkInstance                      Instance;
     VkPhysicalDevice                PhysicalDevice;
     VkDevice                        Device;
     uint32_t                        QueueFamily;
     VkQueue                         Queue;
-    VkDescriptorPool                DescriptorPool;               // See requirements in note above; ignored if using DescriptorPoolSize > 0
-    VkRenderPass                    RenderPass;                   // Ignored if using dynamic rendering
-    uint32_t                        MinImageCount;                // >= 2
-    uint32_t                        ImageCount;                   // >= MinImageCount
-    VkSampleCountFlagBits           MSAASamples;                  // 0 defaults to VK_SAMPLE_COUNT_1_BIT
+    VkDescriptorPool                DescriptorPool;             // See requirements in note above; ignored if using DescriptorPoolSize > 0
+    VkRenderPass                    RenderPass;                 // Ignored if using dynamic rendering
+    uint32_t                        MinImageCount;              // >= 2
+    uint32_t                        ImageCount;                 // >= MinImageCount
+    VkSampleCountFlagBits           MSAASamples;                // 0 defaults to VK_SAMPLE_COUNT_1_BIT
 
     // (Optional)
     VkPipelineCache                 PipelineCache;
@@ -103,7 +104,7 @@ struct ImGui_ImplVulkan_InitInfo
     // (Optional) Allocation, Debugging
     const VkAllocationCallbacks*    Allocator;
     void                            (*CheckVkResultFn)(VkResult err);
-    VkDeviceSize                    MinAllocationSize;      // Minimum allocation size. Set to 1024*1024 to satisfy zealous best practices validation layer and waste a little memory.
+    VkDeviceSize                    MinAllocationSize;          // Minimum allocation size. Set to 1024*1024 to satisfy zealous best practices validation layer and waste a little memory.
 };
 
 // Follow "Getting Started" link and check examples/ folder to learn about using backends!

docs/CHANGELOG.txt

@@ -80,6 +80,10 @@ Other changes:
 - Backends: SDL2, SDL3:  Using SDL_OpenURL() in platform_io.Platform_OpenInShellFn
   handler. (#7660) [@achabense]
 - Backends: Metal: Fixed a crash on application resources. (#8367, #7419) [@anszom]
+- Backends: Vulkan: Added ApiVersion field in ImGui_ImplVulkan_InitInfo.
+  Default to header version if unspecified. (#8326, #8365) [@mklefrancois]
+- Backends: Vulkan: Dynamic rendering path loads "vkCmdBeginRendering/vkCmdEndRendering"
+  (without -KHR suffix) on API 1.3. (#8326, #8365) [@mklefrancois]
 - Backends: WebGPU: Fix for DAWN API rename WGPUProgrammableStageDescriptor -> WGPUComputeState.
   [@PhantomCloak] (#8369)