From e132cac0e5ebc07e8b5bdbdef6f26abb23177c91 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Sat, 30 Jan 2021 14:38:58 +1000
Subject: [PATCH] ImGui: Clear memory for font after creating texture

---
 src/frontend-common/imgui_impl_dx11.cpp    | 2 ++
 src/frontend-common/imgui_impl_opengl3.cpp | 1 +
 src/frontend-common/imgui_impl_vulkan.cpp  | 1 +
 3 files changed, 4 insertions(+)

diff --git a/src/frontend-common/imgui_impl_dx11.cpp b/src/frontend-common/imgui_impl_dx11.cpp
index 9748cb8fd..ffd7c50d7 100644
--- a/src/frontend-common/imgui_impl_dx11.cpp
+++ b/src/frontend-common/imgui_impl_dx11.cpp
@@ -314,6 +314,8 @@ static void ImGui_ImplDX11_CreateFontsTexture()
         desc.MaxLOD = 0.f;
         g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
     }
+
+    io.Fonts->ClearTexData();
 }
 
 bool    ImGui_ImplDX11_CreateDeviceObjects()
diff --git a/src/frontend-common/imgui_impl_opengl3.cpp b/src/frontend-common/imgui_impl_opengl3.cpp
index 3ad3f57d1..c58b9b8ce 100644
--- a/src/frontend-common/imgui_impl_opengl3.cpp
+++ b/src/frontend-common/imgui_impl_opengl3.cpp
@@ -298,6 +298,7 @@ bool ImGui_ImplOpenGL3_CreateFontsTexture()
 
     // Restore state
     glBindTexture(GL_TEXTURE_2D, last_texture);
+    io.Fonts->ClearTexData();
 
     return true;
 }
diff --git a/src/frontend-common/imgui_impl_vulkan.cpp b/src/frontend-common/imgui_impl_vulkan.cpp
index 06e0a2c44..4bed4d499 100644
--- a/src/frontend-common/imgui_impl_vulkan.cpp
+++ b/src/frontend-common/imgui_impl_vulkan.cpp
@@ -577,6 +577,7 @@ bool ImGui_ImplVulkan_CreateFontsTexture(VkCommandBuffer command_buffer)
 
     // Store our identifier
     io.Fonts->TexID = (ImTextureID)(intptr_t)&g_FontTexture;
+    io.Fonts->ClearTexData();
 
     return true;
 }