From 9ee2e0a1dbe8eb8347affd94dff0469c88b9be83 Mon Sep 17 00:00:00 2001
From: Swung0x48 <swung0x48@outlook.com>
Date: Wed, 12 Aug 2026 15:22:39 -0400
Subject: [PATCH] [Fix] (MG_Backend/DirectGLES): re-push the texture parameters
 a regenerated driver texture has lost, instead of trusting caches that
 outlived it

---
 MobileGL/MG_Backend/DirectGLES/Managers.cpp | 17 ++++++++++++++++-
 MobileGL/MG_Backend/DirectGLES/Managers.h   |  4 ++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/MobileGL/MG_Backend/DirectGLES/Managers.cpp b/MobileGL/MG_Backend/DirectGLES/Managers.cpp
index de01ba69..607c11ba 100644
--- a/MobileGL/MG_Backend/DirectGLES/Managers.cpp
+++ b/MobileGL/MG_Backend/DirectGLES/Managers.cpp
@@ -1964,6 +1964,20 @@ namespace MobileGL::MG_Backend::DirectGLES {
             m_isInitialized = false;
             m_backendStorageImmutable = false;
             m_prevTextureInfo = {};
+            // The new ES texture starts at the ES defaults, so every parameter this object had
+            // already pushed onto the old one is gone. The change-detection caches below would
+            // otherwise still claim those values are in force and SyncTextureParamsToBackend
+            // would skip the whole pass on the unchanged params version, leaving the driver
+            // texture at defaults for the rest of its life. Latent for swizzle, LOD range and
+            // border colour long before GL_DEPTH_STENCIL_TEXTURE_MODE joined them; the mode
+            // makes it visible because falling back to the default silently samples the wrong
+            // aspect rather than merely mis-filtering.
+            m_cacheLodRange = {0, 1000};
+            m_cacheBorderColor = {0.0f, 0.0f, 0.0f, 0.0f};
+            m_cacheSwizzleParams = {TextureSwizzleParam::Red, TextureSwizzleParam::Green, TextureSwizzleParam::Blue,
+                                    TextureSwizzleParam::Alpha};
+            m_cacheDepthStencilTextureMode = GL_DEPTH_COMPONENT;
+            m_forceTextureParamsResync = true;
         }
 
         // Sets the backend GL unpack state to MobileGL's upload default for the scope,
@@ -3216,11 +3230,12 @@ namespace MobileGL::MG_Backend::DirectGLES {
             }
 
             Uint16 currentTextureParamsVersion = stateTextureObject->GetTextureParamsVersion();
-            if (m_syncedTextureParamsVersion == currentTextureParamsVersion) {
+            if (m_syncedTextureParamsVersion == currentTextureParamsVersion && !m_forceTextureParamsResync) {
                 MGLOG_D("Texture parameters have not changed for texture ID: %u, skipping sync.", m_backendTextureId);
                 return;
             }
             m_syncedTextureParamsVersion = currentTextureParamsVersion;
+            m_forceTextureParamsResync = false;
 
             MGLOG_D("Syncing texture params with backend ID %u to backend for state ID %u", m_backendTextureId,
                     stateTextureObject->GetExternalIndex());
diff --git a/MobileGL/MG_Backend/DirectGLES/Managers.h b/MobileGL/MG_Backend/DirectGLES/Managers.h
index 20c666b4..33669ed5 100644
--- a/MobileGL/MG_Backend/DirectGLES/Managers.h
+++ b/MobileGL/MG_Backend/DirectGLES/Managers.h
@@ -707,6 +707,10 @@ namespace MobileGL::MG_Backend::DirectGLES {
             GLenum m_cacheDepthStencilTextureMode = GL_DEPTH_COMPONENT;
             Uint16 m_syncedSamplerVersion = 0;
             Uint16 m_syncedTextureParamsVersion = 0;
+            // Set when the driver texture underneath was regenerated and has therefore lost every
+            // parameter already pushed onto it: the params-version early-out has to be overridden
+            // once, or an unchanged version would skip the re-push forever.
+            Bool m_forceTextureParamsResync = false;
         };
 
         void ActivateTextureUnit(Uint unit);