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[Fix] (MG_Backend/DirectGLES): a declined map renewal left the respecify pointing at immutable storage

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swung0x48
2026-08-12 09:17:54 -04:00
parent bb122ebd4f
commit 74ce58a6c7
1 changed files with 14 additions and 2 deletions
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MobileGL/MG_Backend/DirectGLES/Managers.cpp
+14 -2
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@@ -610,10 +610,22 @@ namespace MobileGL::MG_Backend::DirectGLES {
// where a respecification would put them. // where a respecification would put them.
if (bufferObject.IsBackendPersistentMapped()) return; if (bufferObject.IsBackendPersistentMapped()) return;
// Renewal declined (a zero-sized store, or the map could not be // Renewal declined (a zero-sized store, or the map could not be
// retaken): the buffer is back on its CPU shadow and needs the // retaken): the buffer is back on its CPU shadow and needs an ordinary
// ordinary respecification below. // store again. Not this id's, though - it carries IMMUTABLE storage
// (glBufferStorageEXT), which glBufferData below would refuse. Drop it
// and let the lazy EnsureBufferResource path mint a mutable one with a
// full upload; nothing points into the old mapping any more, because
// the frontend has just given the adoption back.
resource->persistentMapped = false; resource->persistentMapped = false;
resource->persistentPtr = nullptr; resource->persistentPtr = nullptr;
if (resource->id != 0 && CanTouchGLNow() &&
resource->contextGeneration == g_bufferContextGeneration) {
ScrubBufferBindingShadowsForId(resource->id);
g_GLESFuncs.glDeleteBuffers(1, &resource->id);
}
resource->id = 0;
resource->storageInitialized = false;
resource->storageSize = 0;
} }
if (!CanTouchGLNow() || resource->id == 0 || if (!CanTouchGLNow() || resource->id == 0 ||
resource->contextGeneration != g_bufferContextGeneration) { resource->contextGeneration != g_bufferContextGeneration) {