From d61caf57145294fe98445eff3f21e24c71bd58c4 Mon Sep 17 00:00:00 2001 From: omar Date: Fri, 5 Apr 2019 18:52:40 +0200 Subject: [PATCH] Vulkan, Viewports: ImGui_ImplVulkan_RenderDrawData and renderer back-end automatically manage ImGui_ImplVulkanH_WindowRenderBuffers for each viewports so user doesn't have to do it. (#2461, #2348, #2378, #2097) --- examples/imgui_impl_vulkan.cpp | 59 ++++++++++++++++++++++------------ examples/imgui_impl_vulkan.h | 4 --- imgui.cpp | 1 + imgui.h | 3 +- 4 files changed, 42 insertions(+), 25 deletions(-) diff --git a/examples/imgui_impl_vulkan.cpp b/examples/imgui_impl_vulkan.cpp index 1c9e7b51..2dc93b3e 100644 --- a/examples/imgui_impl_vulkan.cpp +++ b/examples/imgui_impl_vulkan.cpp @@ -65,6 +65,17 @@ struct ImGui_ImplVulkanH_WindowRenderBuffers ImGui_ImplVulkanH_FrameRenderBuffers* FrameRenderBuffers; }; +// For multi-viewport support +struct ImGuiViewportDataVulkan +{ + bool WindowOwned; + ImGui_ImplVulkanH_Window Window; // Used by secondary viewports only + ImGui_ImplVulkanH_WindowRenderBuffers RenderBuffers; // Used by all viewports + + ImGuiViewportDataVulkan() { WindowOwned = false; memset(&RenderBuffers, 0, sizeof(RenderBuffers)); } + ~ImGuiViewportDataVulkan() { } +}; + // Vulkan data static ImGui_ImplVulkan_InitInfo g_VulkanInitInfo = {}; static VkRenderPass g_RenderPass = VK_NULL_HANDLE; @@ -83,14 +94,14 @@ static VkImageView g_FontView = VK_NULL_HANDLE; static VkDeviceMemory g_UploadBufferMemory = VK_NULL_HANDLE; static VkBuffer g_UploadBuffer = VK_NULL_HANDLE; -// Render buffers -static ImGui_ImplVulkanH_WindowRenderBuffers g_MainWindowRenderBuffers; - // Forward Declarations +bool ImGui_ImplVulkan_CreateDeviceObjects(); +void ImGui_ImplVulkan_DestroyDeviceObjects(); void ImGui_ImplVulkanH_DestroyFrame(VkDevice device, ImGui_ImplVulkanH_Frame* fd, const VkAllocationCallbacks* allocator); void ImGui_ImplVulkanH_DestroyFrameSemaphores(VkDevice device, ImGui_ImplVulkanH_FrameSemaphores* fsd, const VkAllocationCallbacks* allocator); void ImGui_ImplVulkanH_DestroyFrameRenderBuffers(VkDevice device, ImGui_ImplVulkanH_FrameRenderBuffers* buffers, const VkAllocationCallbacks* allocator); void ImGui_ImplVulkanH_DestroyWindowRenderBuffers(VkDevice device, ImGui_ImplVulkanH_WindowRenderBuffers* buffers, const VkAllocationCallbacks* allocator); +void ImGui_ImplVulkanH_DestroyAllViewportsRenderBuffers(VkDevice device, const VkAllocationCallbacks* allocator); void ImGui_ImplVulkanH_CreateWindowSwapChain(VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, const VkAllocationCallbacks* allocator, int w, int h, uint32_t min_image_count); void ImGui_ImplVulkanH_CreateWindowCommandBuffers(VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator); @@ -274,8 +285,10 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo; - // Allocate array to store enough vertex/index buffers - ImGui_ImplVulkanH_WindowRenderBuffers* wrb = &g_MainWindowRenderBuffers; + // Allocate array to store enough vertex/index buffers. Each unique viewport gets its own storage. + ImGuiViewportDataVulkan* viewport_renderer_data = (ImGuiViewportDataVulkan*)draw_data->OwnerViewport->RendererUserData; + IM_ASSERT(viewport_renderer_data != NULL); + ImGui_ImplVulkanH_WindowRenderBuffers* wrb = &viewport_renderer_data->RenderBuffers; if (wrb->FrameRenderBuffers == NULL) { wrb->Index = 0; @@ -777,7 +790,7 @@ void ImGui_ImplVulkan_DestroyFontUploadObjects() void ImGui_ImplVulkan_DestroyDeviceObjects() { ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo; - ImGui_ImplVulkanH_DestroyWindowRenderBuffers(v->Device, &g_MainWindowRenderBuffers, v->Allocator); + ImGui_ImplVulkanH_DestroyAllViewportsRenderBuffers(v->Device, v->Allocator); ImGui_ImplVulkan_DestroyFontUploadObjects(); if (g_FontView) { vkDestroyImageView(v->Device, g_FontView, v->Allocator); g_FontView = VK_NULL_HANDLE; } @@ -809,6 +822,10 @@ bool ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info, VkRenderPass rend g_RenderPass = render_pass; ImGui_ImplVulkan_CreateDeviceObjects(); + // Our render function expect RendererUserData to be storing the window render buffer we need (for the main viewport we won't use ->Window) + ImGuiViewport* main_viewport = ImGui::GetMainViewport(); + main_viewport->RendererUserData = IM_NEW(ImGuiViewportDataVulkan)(); + if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) ImGui_ImplVulkan_InitPlatformInterface(); @@ -830,11 +847,13 @@ void ImGui_ImplVulkan_SetMinImageCount(uint32_t min_image_count) IM_ASSERT(min_image_count >= 2); if (g_VulkanInitInfo.MinImageCount == min_image_count) return; - IM_ASSERT(0); // FIXME-VIEWPORT: Need to recreate all swap chains? + + IM_ASSERT(0); // FIXME-VIEWPORT: Unsupported. Need to recreate all swap chains! ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo; VkResult err = vkDeviceWaitIdle(v->Device); check_vk_result(err); - ImGui_ImplVulkanH_DestroyWindowRenderBuffers(v->Device, &g_MainWindowRenderBuffers, v->Allocator); + + ImGui_ImplVulkanH_DestroyAllViewportsRenderBuffers(v->Device, v->Allocator); g_VulkanInitInfo.MinImageCount = min_image_count; } @@ -1211,22 +1230,19 @@ void ImGui_ImplVulkanH_DestroyWindowRenderBuffers(VkDevice device, ImGui_ImplVul buffers->Count = 0; } +void ImGui_ImplVulkanH_DestroyAllViewportsRenderBuffers(VkDevice device, const VkAllocationCallbacks* allocator) +{ + ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO(); + for (int n = 0; n < platform_io.Viewports.Size; n++) + if (ImGuiViewportDataVulkan* data = (ImGuiViewportDataVulkan*)platform_io.Viewports[n]->RendererUserData) + ImGui_ImplVulkanH_DestroyWindowRenderBuffers(device, &data->RenderBuffers, allocator); +} //-------------------------------------------------------------------------------------------------------- // MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT // This is an _advanced_ and _optional_ feature, allowing the back-end to create and handle multiple viewports simultaneously. // If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first.. //-------------------------------------------------------------------------------------------------------- -// FIXME-PLATFORM: Vulkan support unfinished -//-------------------------------------------------------------------------------------------------------- - -struct ImGuiViewportDataVulkan -{ - ImGui_ImplVulkanH_Window Window; - - ImGuiViewportDataVulkan() { } - ~ImGuiViewportDataVulkan() { } -}; static void ImGui_ImplVulkan_CreateWindow(ImGuiViewport* viewport) { @@ -1263,6 +1279,7 @@ static void ImGui_ImplVulkan_CreateWindow(ImGuiViewport* viewport) // Create SwapChain, RenderPass, Framebuffer, etc. wd->ClearEnable = (viewport->Flags & ImGuiViewportFlags_NoRendererClear) ? false : true; ImGui_ImplVulkanH_CreateWindow(v->Instance, v->PhysicalDevice, v->Device, wd, v->QueueFamily, v->Allocator, (int)viewport->Size.x, (int)viewport->Size.y, v->MinImageCount); + data->WindowOwned = true; } static void ImGui_ImplVulkan_DestroyWindow(ImGuiViewport* viewport) @@ -1271,7 +1288,9 @@ static void ImGui_ImplVulkan_DestroyWindow(ImGuiViewport* viewport) if (ImGuiViewportDataVulkan* data = (ImGuiViewportDataVulkan*)viewport->RendererUserData) { ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo; - ImGui_ImplVulkanH_DestroyWindow(v->Instance, v->Device, &data->Window, v->Allocator); + if (data->WindowOwned) + ImGui_ImplVulkanH_DestroyWindow(v->Instance, v->Device, &data->Window, v->Allocator); + ImGui_ImplVulkanH_DestroyWindowRenderBuffers(v->Device, &data->RenderBuffers, v->Allocator); IM_DELETE(data); } viewport->RendererUserData = NULL; @@ -1380,7 +1399,7 @@ static void ImGui_ImplVulkan_SwapBuffers(ImGuiViewport* viewport, void*) err = vkQueuePresentKHR(v->Queue, &info); check_vk_result(err); - wd->FrameIndex = (wd->FrameIndex + 1) % wd->ImageCount; // This is for the next vkWaitForFences() + wd->FrameIndex = (wd->FrameIndex + 1) % wd->ImageCount; // This is for the next vkWaitForFences() wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->ImageCount; // Now we can use the next set of semaphores } diff --git a/examples/imgui_impl_vulkan.h b/examples/imgui_impl_vulkan.h index eba29c42..9ff70c01 100644 --- a/examples/imgui_impl_vulkan.h +++ b/examples/imgui_impl_vulkan.h @@ -49,10 +49,6 @@ IMGUI_IMPL_API bool ImGui_ImplVulkan_CreateFontsTexture(VkCommandBuffer comm IMGUI_IMPL_API void ImGui_ImplVulkan_DestroyFontUploadObjects(); IMGUI_IMPL_API void ImGui_ImplVulkan_SetMinImageCount(uint32_t min_image_count); // To override MinImageCount after initialization (e.g. if swap chain is recreated) -// Called by ImGui_ImplVulkan_Init(), might be useful elsewhere. -IMGUI_IMPL_API bool ImGui_ImplVulkan_CreateDeviceObjects(); -IMGUI_IMPL_API void ImGui_ImplVulkan_DestroyDeviceObjects(); - //------------------------------------------------------------------------- // Internal / Miscellaneous Vulkan Helpers diff --git a/imgui.cpp b/imgui.cpp index c96b2d8a..51123a68 100644 --- a/imgui.cpp +++ b/imgui.cpp @@ -4000,6 +4000,7 @@ static void SetupViewportDrawData(ImGuiViewportP* viewport, ImVectorDisplayPos = viewport->Pos; draw_data->DisplaySize = viewport->Size; draw_data->FramebufferScale = ImGui::GetIO().DisplayFramebufferScale; // FIXME-VIEWPORT: This may vary on a per-monitor/viewport basis? + draw_data->OwnerViewport = viewport; for (int n = 0; n < draw_lists->Size; n++) { draw_data->TotalVtxCount += draw_lists->Data[n]->VtxBuffer.Size; diff --git a/imgui.h b/imgui.h index f990e066..fc9d4146 100644 --- a/imgui.h +++ b/imgui.h @@ -2012,11 +2012,12 @@ struct ImDrawData ImVec2 DisplayPos; // Upper-left position of the viewport to render (== upper-left of the orthogonal projection matrix to use) ImVec2 DisplaySize; // Size of the viewport to render (== io.DisplaySize for the main viewport) (DisplayPos + DisplaySize == lower-right of the orthogonal projection matrix to use) ImVec2 FramebufferScale; // Amount of pixels for each unit of DisplaySize. Based on io.DisplayFramebufferScale. Generally (1,1) on normal display, (2,2) on OSX with Retina display. + ImGuiViewport* OwnerViewport; // Viewport carrying the ImDrawData instance, might be of use to the renderer (generally not). // Functions ImDrawData() { Valid = false; Clear(); } ~ImDrawData() { Clear(); } - void Clear() { Valid = false; CmdLists = NULL; CmdListsCount = TotalVtxCount = TotalIdxCount = 0; DisplayPos = DisplaySize = FramebufferScale = ImVec2(0.f, 0.f); } // The ImDrawList are owned by ImGuiContext! + void Clear() { Valid = false; CmdLists = NULL; CmdListsCount = TotalVtxCount = TotalIdxCount = 0; DisplayPos = DisplaySize = FramebufferScale = ImVec2(0.f, 0.f); OwnerViewport = NULL; } // The ImDrawList are owned by ImGuiContext! IMGUI_API void DeIndexAllBuffers(); // Helper to convert all buffers from indexed to non-indexed, in case you cannot render indexed. Note: this is slow and most likely a waste of resources. Always prefer indexed rendering! IMGUI_API void ScaleClipRects(const ImVec2& fb_scale); // Helper to scale the ClipRect field of each ImDrawCmd. Use if your final output buffer is at a different scale than ImGui expects, or if there is a difference between your window resolution and framebuffer resolution. };