ImTextureID casting to VkDescriptorSet* is not always FontAtlas set or a valid set

[Pikachuxxxx]

Version/Branch of Dear ImGui:

Version: 1.83 WIP
Branch: docking

Back-end/Renderer/Compiler/OS

Back-ends: imgui_ImplGlfw_InitForVulkan.cpp + custom renderering engine
Compiler: MSVC
Operating System: Windows 11

My Issue/Question:

I've been trying to make my custom Vulkan backend for ImGui and have been successful in issuing drawcalls myself using ImDrawData, the problem is when I pass the VkDescriptorSet* casted as ImTexturteID for ImGui::Image()

I use the ImTextureID curreTexID = pcmd->GetTexID() to the pointer I passed, but it looks like that it doesn't always point to the Font (I did use ImFontAtlas::SetTexID)or the Image DescriptorSet that I have set, it's not a nullptr or FontAtlas by default which is causing my application to crash, If I manullay verify using If statement for the font Atlas Set by comparing the pointers the descriptorset and ImTextureID it get bound properly, I don't know why it spits out unset values in addition to these, isn't ImTextureID supposed be a nullptr or set to FontAtlas by default which would make using ImTextureID more safe?

for (uint32_t i = 0; i < imDrawData->CmdListsCount; ++i) {
            const ImDrawList* cmd_list = imDrawData->CmdLists[i];
            for (int32_t j = 0; j < cmd_list->CmdBuffer.Size; j++) {
                const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[j];
                ImTextureID curreTexID = pcmd->GetTexID(); // How to know it isn't Image or Font TexID?
                vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, m_ImGuiPipelineLayout, 0, 1, (VkDescriptorSet*) (curreTexID), 0, NULL);
                VkRect2D scissorRect{};
                scissorRect.offset.x = std::max((int32_t) (pcmd->ClipRect.x), 0);
                scissorRect.offset.y = std::max((int32_t) (pcmd->ClipRect.y), 0);
                scissorRect.extent.width = (uint32_t) (pcmd->ClipRect.z - pcmd->ClipRect.x);
                scissorRect.extent.height = (uint32_t) (pcmd->ClipRect.w - pcmd->ClipRect.y);
                vkCmdSetScissor(commandBuffer, 0, 1, &scissorRect);
                vkCmdDrawIndexed(commandBuffer, pcmd->ElemCount, 1, indexOffset, vertexOffset, 0);
                indexOffset += pcmd->ElemCount;
            }
            vertexOffset += cmd_list->VtxBuffer.Size;
        }

Also I found this and was wondering what's the workaround for this because currently I can't use more than one ImGui::Image with Vulkan (I manually store the current Image Set and check while binding to either use font or this one)

// Since 1.83: returns ImTextureID associated with this draw call. Warning: DO NOT assume this is always same as 'TextureId' (we will change this function for an upcoming feature)
inline ImTextureID GetTexID() const { return TextureId; }

[Pikachuxxxx]

from #914 and #1641

 #ifndef ImTextureID
typedef void* ImTextureID;          // user data to identify a texture (this is whatever to you want it to be! read the FAQ about ImTextureID in imgui.cpp)
#endif

modifying imconfig.h resolved the issue