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Backends: Vulkan: Rework support for custom function/symbol loader (#…
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…3759, #3227), add ImGui_ImplVulkan_LoadFunctions (amend 6001c54)

Making it a separate function allows to use/test this with our examples or any code using the VulkanH helper called before ImGui_ImplVulkan_Init()
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@ocornut
ocornut committed Jan 27, 2021
1 parent 6001c54 commit 6487860
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177 changes: 100 additions & 77 deletions backends/imgui_impl_vulkan.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@

// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2021-01-27: Vulkan: Added support for custom function load and IMGUI_IMPL_VULKAN_NO_PROTOTYPES by using ImGui_ImplVulkan_LoadFunctions().
// 2020-11-11: Vulkan: Added support for specifying which subpass to reference during VkPipeline creation.
// 2020-09-07: Vulkan: Added VkPipeline parameter to ImGui_ImplVulkan_RenderDrawData (default to one passed to ImGui_ImplVulkan_Init).
// 2020-05-04: Vulkan: Fixed crash if initial frame has no vertices.
Expand Down Expand Up @@ -51,72 +52,6 @@
#include "imgui_impl_vulkan.h"
#include <stdio.h>

#ifdef IMGUI_IMPL_VULKAN_NO_PROTOTYPES
#define IMGUI_VULKAN_FUNCTIONS_DEF(func) static PFN_##func func;
#define IMGUI_VULKAN_FUNCTIONS_MAP(IMGUI_VULKAN_FUNCTIONS_MAP_MACRO) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkAllocateCommandBuffers) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkAllocateDescriptorSets) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkAllocateMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkBindBufferMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkBindImageMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdBindDescriptorSets) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdBindIndexBuffer) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdBindPipeline) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdBindVertexBuffers) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdCopyBufferToImage) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdDrawIndexed) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdPipelineBarrier) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdPushConstants) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdSetScissor) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCmdSetViewport) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateBuffer) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateCommandPool) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateDescriptorSetLayout) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateFence) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateFramebuffer) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateGraphicsPipelines) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateImage) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateImageView) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreatePipelineLayout) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateRenderPass) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateSampler) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateSemaphore) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateShaderModule) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkCreateSwapchainKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyBuffer) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyCommandPool) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyDescriptorSetLayout) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyFence) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyFramebuffer) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyImage) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyImageView) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyPipeline) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyPipelineLayout) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyRenderPass) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroySampler) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroySemaphore) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroyShaderModule) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroySurfaceKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDestroySwapchainKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkDeviceWaitIdle) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkFlushMappedMemoryRanges) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkFreeCommandBuffers) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkFreeMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetBufferMemoryRequirements) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetImageMemoryRequirements) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetPhysicalDeviceMemoryProperties) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetPhysicalDeviceSurfaceCapabilitiesKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetPhysicalDeviceSurfaceFormatsKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetPhysicalDeviceSurfacePresentModesKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkGetSwapchainImagesKHR) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkMapMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkUnmapMemory) \
IMGUI_VULKAN_FUNCTIONS_MAP_MACRO(vkUpdateDescriptorSets)

IMGUI_VULKAN_FUNCTIONS_MAP(IMGUI_VULKAN_FUNCTIONS_DEF)
#undef IMGUI_VULKAN_FUNCTIONS_DEF
#endif

// Reusable buffers used for rendering 1 current in-flight frame, for ImGui_ImplVulkan_RenderDrawData()
// [Please zero-clear before use!]
struct ImGui_ImplVulkanH_FrameRenderBuffers
Expand Down Expand Up @@ -150,6 +85,11 @@ static VkPipeline g_Pipeline = VK_NULL_HANDLE;
static uint32_t g_Subpass = 0;
static VkShaderModule g_ShaderModuleVert;
static VkShaderModule g_ShaderModuleFrag;
#ifdef VK_NO_PROTOTYPES
static bool g_FunctionsLoaded = false;
#else
static bool g_FunctionsLoaded = true;
#endif

// Font data
static VkSampler g_FontSampler = VK_NULL_HANDLE;
Expand All @@ -172,6 +112,75 @@ void ImGui_ImplVulkanH_DestroyWindowRenderBuffers(VkDevice device, ImGui_ImplVul
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);

// Vulkan prototypes for use with custom loaders
// (see description of IMGUI_IMPL_VULKAN_NO_PROTOTYPES in imgui_impl_vulkan.h
#ifdef VK_NO_PROTOTYPES
#define IMGUI_VULKAN_FUNC_MAP(IMGUI_VULKAN_FUNC_MAP_MACRO) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkAllocateCommandBuffers) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkAllocateDescriptorSets) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkAllocateMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkBindBufferMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkBindImageMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdBindDescriptorSets) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdBindIndexBuffer) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdBindPipeline) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdBindVertexBuffers) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdCopyBufferToImage) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdDrawIndexed) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdPipelineBarrier) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdPushConstants) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdSetScissor) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCmdSetViewport) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateBuffer) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateCommandPool) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateDescriptorSetLayout) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateFence) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateFramebuffer) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateGraphicsPipelines) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateImage) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateImageView) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreatePipelineLayout) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateRenderPass) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateSampler) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateSemaphore) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateShaderModule) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkCreateSwapchainKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyBuffer) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyCommandPool) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyDescriptorSetLayout) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyFence) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyFramebuffer) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyImage) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyImageView) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyPipeline) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyPipelineLayout) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyRenderPass) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroySampler) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroySemaphore) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroyShaderModule) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroySurfaceKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDestroySwapchainKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkDeviceWaitIdle) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkFlushMappedMemoryRanges) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkFreeCommandBuffers) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkFreeMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetBufferMemoryRequirements) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetImageMemoryRequirements) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetPhysicalDeviceMemoryProperties) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetPhysicalDeviceSurfaceCapabilitiesKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetPhysicalDeviceSurfaceFormatsKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetPhysicalDeviceSurfacePresentModesKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkGetSwapchainImagesKHR) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkMapMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkUnmapMemory) \
IMGUI_VULKAN_FUNC_MAP_MACRO(vkUpdateDescriptorSets)

// Define function pointers
#define IMGUI_VULKAN_FUNC_DEF(func) static PFN_##func func;
IMGUI_VULKAN_FUNC_MAP(IMGUI_VULKAN_FUNC_DEF)
#undef IMGUI_VULKAN_FUNC_DEF
#endif // VK_NO_PROTOTYPES

//-----------------------------------------------------------------------------
// SHADERS
//-----------------------------------------------------------------------------
Expand Down Expand Up @@ -951,19 +960,30 @@ void ImGui_ImplVulkan_DestroyDeviceObjects()
if (g_Pipeline) { vkDestroyPipeline(v->Device, g_Pipeline, v->Allocator); g_Pipeline = VK_NULL_HANDLE; }
}

bool ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info, VkRenderPass render_pass)
bool ImGui_ImplVulkan_LoadFunctions(PFN_vkVoidFunction(*loader_func)(const char* function_name, void* user_data), void* user_data)
{

#ifdef IMGUI_IMPL_VULKAN_NO_PROTOTYPES
IM_ASSERT(info->GetVulkanProcAddressFn != NULL);
#define IMGUI_VULKAN_FUNCTIONS_LOAD(func) \
func = reinterpret_cast<decltype(func)>(info->GetVulkanProcAddressFn(info->user_data, #func)); \
if(NULL == func) { \
return false; \
}
IMGUI_VULKAN_FUNCTIONS_MAP(IMGUI_VULKAN_FUNCTIONS_LOAD)
#undef IMGUI_VULKAN_FUNCTIONS_LOAD
// Load function pointers
// You can use the default Vulkan loader using:
// ImGui_ImplVulkan_LoadFunctions([](const char* function_name, void*) { return vkGetInstanceProcAddr(your_vk_isntance, function_name); });
// But this would be equivalent to not setting VK_NO_PROTOTYPES.
#ifdef VK_NO_PROTOTYPES
#define IMGUI_VULKAN_FUNC_LOAD(func) \
func = reinterpret_cast<decltype(func)>(loader_func(#func, user_data)); \
if (func == NULL) \
return false;
IMGUI_VULKAN_FUNC_MAP(IMGUI_VULKAN_FUNC_LOAD)
#undef IMGUI_VULKAN_FUNC_LOAD
#else
IM_UNUSED(loader_func);
IM_UNUSED(user_data);
#endif
g_FunctionsLoaded = true;
return true;
}

bool ImGui_ImplVulkan_Init(ImGui_ImplVulkan_InitInfo* info, VkRenderPass render_pass)
{
IM_ASSERT(g_FunctionsLoaded && "Need to call ImGui_ImplVulkan_LoadFunctions() if IMGUI_IMPL_VULKAN_NO_PROTOTYPES or VK_NO_PROTOTYPES are set!");

// Setup backend capabilities flags
ImGuiIO& io = ImGui::GetIO();
Expand Down Expand Up @@ -1029,6 +1049,7 @@ void ImGui_ImplVulkan_SetMinImageCount(uint32_t min_image_count)

VkSurfaceFormatKHR ImGui_ImplVulkanH_SelectSurfaceFormat(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkFormat* request_formats, int request_formats_count, VkColorSpaceKHR request_color_space)
{
IM_ASSERT(g_FunctionsLoaded && "Need to call ImGui_ImplVulkan_LoadFunctions() if IMGUI_IMPL_VULKAN_NO_PROTOTYPES or VK_NO_PROTOTYPES are set!");
IM_ASSERT(request_formats != NULL);
IM_ASSERT(request_formats_count > 0);

Expand Down Expand Up @@ -1073,6 +1094,7 @@ VkSurfaceFormatKHR ImGui_ImplVulkanH_SelectSurfaceFormat(VkPhysicalDevice physic

VkPresentModeKHR ImGui_ImplVulkanH_SelectPresentMode(VkPhysicalDevice physical_device, VkSurfaceKHR surface, const VkPresentModeKHR* request_modes, int request_modes_count)
{
IM_ASSERT(g_FunctionsLoaded && "Need to call ImGui_ImplVulkan_LoadFunctions() if IMGUI_IMPL_VULKAN_NO_PROTOTYPES or VK_NO_PROTOTYPES are set!");
IM_ASSERT(request_modes != NULL);
IM_ASSERT(request_modes_count > 0);

Expand Down Expand Up @@ -1323,6 +1345,7 @@ void ImGui_ImplVulkanH_CreateWindowSwapChain(VkPhysicalDevice physical_device, V
// Create or resize window
void ImGui_ImplVulkanH_CreateOrResizeWindow(VkInstance instance, VkPhysicalDevice physical_device, VkDevice device, ImGui_ImplVulkanH_Window* wd, uint32_t queue_family, const VkAllocationCallbacks* allocator, int width, int height, uint32_t min_image_count)
{
IM_ASSERT(g_FunctionsLoaded && "Need to call ImGui_ImplVulkan_LoadFunctions() if IMGUI_IMPL_VULKAN_NO_PROTOTYPES or VK_NO_PROTOTYPES are set!");
(void)instance;
ImGui_ImplVulkanH_CreateWindowSwapChain(physical_device, device, wd, allocator, width, height, min_image_count);
ImGui_ImplVulkanH_CreateWindowCommandBuffers(physical_device, device, wd, queue_family, allocator);
Expand Down
57 changes: 29 additions & 28 deletions backends/imgui_impl_vulkan.h
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Original file line number Diff line number Diff line change
Expand Up @@ -23,43 +23,41 @@
#pragma once
#include "imgui.h" // IMGUI_IMPL_API

// In order to be able to use a customized Vulkan loader instead of the default one, you can uncomment the
// underlying definition in here (not in your code) or define it as a compilation flag in your build system.
// After enabling this, the user has to provide 'GetVulkanProcAddressFn' (and 'user_data' if it was needed) in
// the 'ImGui_ImplVulkan_InitInfo' so the implementation can resolve function addresses with that.
// If you have no idea what it is, leave it alone!
// [Configuration] in order to use a custom Vulkan function loader:
// (1) You'll need to disable default Vulkan function prototypes.
// We provide a '#define IMGUI_IMPL_VULKAN_NO_PROTOTYPES' convenience configuration flag.
// In order to make sure this is visible from the imgui_impl_vulkan.cpp compilation unit:
// - Add '#define IMGUI_IMPL_VULKAN_NO_PROTOTYPES' in your imconfig.h file
// - Or as a compilation flag in your build system
// - Or uncomment here (not recommended because you'd be modifying imgui sources!)
// - Do not simply add it in a .cpp file!
// (2) Call ImGui_ImplVulkan_LoadFunctions() before ImGui_ImplVulkan_Init() with your custom function.
// If you have no idea what this is, leave it alone!
//#define IMGUI_IMPL_VULKAN_NO_PROTOTYPES

#ifdef IMGUI_IMPL_VULKAN_NO_PROTOTYPES
#define VK_NO_PROTOTYPES 1
// Vulkan includes
#if defined(IMGUI_IMPL_VULKAN_NO_PROTOTYPES) && !defined(VK_NO_PROTOTYPES)
#define VK_NO_PROTOTYPES
#endif
#include <vulkan/vulkan.h>

// Initialization data, for ImGui_ImplVulkan_Init()
// [Please zero-clear before use!]
struct ImGui_ImplVulkan_InitInfo
{
VkInstance Instance;
VkPhysicalDevice PhysicalDevice;
VkDevice Device;
uint32_t QueueFamily;
VkQueue Queue;
VkPipelineCache PipelineCache;
VkDescriptorPool DescriptorPool;
uint32_t Subpass;
uint32_t MinImageCount; // >= 2
uint32_t ImageCount; // >= MinImageCount
VkSampleCountFlagBits MSAASamples; // >= VK_SAMPLE_COUNT_1_BIT
const VkAllocationCallbacks* Allocator;
void (*CheckVkResultFn)(VkResult err);
#ifdef IMGUI_IMPL_VULKAN_NO_PROTOTYPES
// This function pointer is needed when the default Vulkan loader is disabled(not applicable).
// For more information look at comments before '#define IMGUI_IMPL_VULKAN_NO_PROTOTYPES'
PFN_vkVoidFunction (*GetVulkanProcAddressFn)(void *user_data, const char* pName);
// This pointer is going to be fed to the 'GetVulkanProcAddressFn', you can use it for
// accessing contex/object that is maybe needed for the function call.
void *user_data;
#endif
VkInstance Instance;
VkPhysicalDevice PhysicalDevice;
VkDevice Device;
uint32_t QueueFamily;
VkQueue Queue;
VkPipelineCache PipelineCache;
VkDescriptorPool DescriptorPool;
uint32_t Subpass;
uint32_t MinImageCount; // >= 2
uint32_t ImageCount; // >= MinImageCount
VkSampleCountFlagBits MSAASamples; // >= VK_SAMPLE_COUNT_1_BIT
const VkAllocationCallbacks* Allocator;
void (*CheckVkResultFn)(VkResult err);
};

// Called by user code
Expand All @@ -71,6 +69,9 @@ 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)

// Optional: load Vulkan functions with a custom function loader
// This is only useful with IMGUI_IMPL_VULKAN_NO_PROTOTYPES / VK_NO_PROTOTYPES
IMGUI_IMPL_API bool ImGui_ImplVulkan_LoadFunctions(PFN_vkVoidFunction(*loader_func)(const char* function_name, void* user_data), void* user_data = NULL);

//-------------------------------------------------------------------------
// Internal / Miscellaneous Vulkan Helpers
Expand Down
2 changes: 2 additions & 0 deletions docs/CHANGELOG.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,8 @@ Other Changes:
Would lead to a buffer read overflow.
- Backends: Win32: Dynamically loading XInput DLL instead of linking with it, facilite compiling with
old WindowSDK versions or running on Windows 7. (#3646, #3645, #3248, #2716) [@Demonese]
- Backends: Vulkan: Add support for custom Vulkan function loader and VK_NO_PROTOTYPES. (#3759, #3227) [@Hossein-Noroozpour]
User needs to call ImGui_ImplVulkan_LoadFunctions() with their custom loader prior to other functions.
- Backends: Metal: Fixed texture storage mode when building on Mac Catalyst. (#3748) [@Belinsky-L-V]
- Backends: OSX: Fixed mouse position not being reported when mouse buttons other than left one are down. (#3762) [@rokups]

Expand Down

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