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Backends: Vulkan: added ImGui_ImplVulkan_PipelineInfo::ExtraDynamicStates. (#9211)

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This new setting allows an application to force the pipeline created by vulkan backend to specify more dynamic states than just default viewport and scissor.
It is useful e.g. when using draw list callbacks, e.g. adding VK_DYNAMIC_STATE_COLOR_BLEND_EQUATION_EXT to be able to use vkCmdSetColorBlendEquationEXT inside callbacks.
This commit is contained in:
MaciejDziuban
2026-01-31 15:50:22 +01:00
committed by ocornut
parent 5dd56d4bb5
commit decb5cdf10
3 changed files with 9 additions and 3 deletions
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9
backends/imgui_impl_vulkan.cpp
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@@ -27,6 +27,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-03-11: Vulkan: Added ImGui_ImplVulkan_PipelineInfo::ExtraDynamicStates[] to allow specifying extra dynamic states to add when creating the VkPipeline. (#9211)
// 2025-09-26: [Helpers] *BREAKING CHANGE*: Vulkan: Helper ImGui_ImplVulkanH_DestroyWindow() does not call vkDestroySurfaceKHR(): as surface is created by caller of ImGui_ImplVulkanH_CreateOrResizeWindow(), it is more consistent that we don't destroy it. (#9163)
// 2026-01-05: [Helpers] *BREAKING CHANGE*: Vulkan: Helper for creating render pass uses ImGui_ImplVulkanH_Window::AttachmentDesc to create render pass. Removed ClearEnabled. (#9152)
// 2025-11-24: [Helpers] Vulkan: Helper for creating a swap-chain (used by examples and multi-viewports) selects VkSwapchainCreateInfoKHR's compositeAlpha based on cap.supportedCompositeAlpha. (#8784)
@@ -1009,11 +1010,13 @@ static VkPipeline ImGui_ImplVulkan_CreatePipeline(VkDevice device, const VkAlloc
blend_info.attachmentCount = 1;
blend_info.pAttachments = color_attachment;
VkDynamicState dynamic_states[2] = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
ImVector<VkDynamicState> dynamic_states = info->ExtraDynamicStates;
dynamic_states.push_back(VK_DYNAMIC_STATE_VIEWPORT);
dynamic_states.push_back(VK_DYNAMIC_STATE_SCISSOR);
VkPipelineDynamicStateCreateInfo dynamic_state = {};
dynamic_state.sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
dynamic_state.dynamicStateCount = (uint32_t)IM_COUNTOF(dynamic_states);
dynamic_state.pDynamicStates = dynamic_states;
dynamic_state.dynamicStateCount = dynamic_states.Size;
dynamic_state.pDynamicStates = dynamic_states.Data;
VkGraphicsPipelineCreateInfo create_info = {};
create_info.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;

1
backends/imgui_impl_vulkan.h
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@@ -86,6 +86,7 @@ struct ImGui_ImplVulkan_PipelineInfo
VkRenderPass RenderPass; // Ignored if using dynamic rendering
uint32_t Subpass; //
VkSampleCountFlagBits MSAASamples = {}; // 0 defaults to VK_SAMPLE_COUNT_1_BIT
ImVector<VkDynamicState> ExtraDynamicStates; // Optional, allows to insert more dynamic states into our VkPipeline
#ifdef IMGUI_IMPL_VULKAN_HAS_DYNAMIC_RENDERING
VkPipelineRenderingCreateInfoKHR PipelineRenderingCreateInfo; // Optional, valid if .sType == VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR
#endif

2
docs/CHANGELOG.txt
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@@ -102,6 +102,8 @@ Other Changes:
- Emscripten: fixed minor rendering issues with our HTML shell. (#9281) [@ypujante]
- hidden small blue outline when canvas is focused on Chrome.
- hidden scrollbar in Firefox.
- Vulkan: added ImGui_ImplVulkan_PipelineInfo::ExtraDynamicStates[] to allow specifying
extra dynamic states to add when creating the VkPipeline. (#9211) [@DziubanMaciej]
- WebGPU: fixed undefined behaviors in example code for requesting adapter
and device. (#9246, #9256) [@r-lyeh]
- GLFW/SDL2/SDL3+WebGPU: removed suport for Emscripten <4.0.10. (#9281) [@ypujante]