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[Fix] (Espryt): ask the frontend object whether the shadow the ensure path is about to upload holds bytes, instead of a descriptor no content call refreshes

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swung0x48
2026-09-08 05:27:03 -04:00
parent 13b380feda
commit 75ea7ee2df
1 changed files with 20 additions and 1 deletions
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MobileGL/MG_Backend/DirectGLES/Managers.cpp
+20 -1
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@@ -2724,7 +2724,26 @@ namespace MobileGL::MG_Backend::DirectGLES {
// Read AFTER SyncPersistentMappedRange above, and through liveHostBase for the
// reason written where it is declared.
const Uint8* const hostBase = liveHostBase();
const void* initialData = record->Desc.HasDefinedContent != 0 ? hostBase : nullptr;
// "DOES THE SHADOW THIS PATH IS ABOUT TO UPLOAD HOLD MEANINGFUL BYTES?" - and it has
// to be asked of the SAME thing the bytes come from, which is why it is not
// record->Desc.HasDefinedContent. The descriptor states what was true at the last
// resource_respecify and NOTHING refreshes it afterwards: resource_subdata,
// resource_flush_range, buffer_subdata_resident and OnGpuWritten all define content
// (BufferObject.cpp:85, :101, :127, :365, :441) without re-emitting a descriptor,
// and re-emitting one per glBufferSubData would be new wire traffic D-J forbids. So
// after the ordinary glBufferData(NULL) + glBufferSubData idiom the descriptor still
// says "undefined", this full re-upload passed nullptr, RespecifyStorageWith
// CLEARED the queued ranges and stamped syncedChangeSerial - i.e. an empty store
// declared current, with the application's bytes dropped and nothing saying so.
// The legacy arm pairs bufferObject.MappedData() with bufferObject.HasDefinedContent()
// (RespecifyStorageNow) and this arm pairs the same two, so the source of the bytes
// and the statement about them can never disagree. Declared, like C-1's IsMapped():
// it is a frontend read this function keeps for P3a and it retires the moment the
// client publishes a live content flag beside the descriptor (P5/P8). With no
// frontend object (the handle-only drains) the descriptor is all there is.
const Bool shadowHasContent =
bufferObject ? bufferObject->HasDefinedContent() : (record->Desc.HasDefinedContent != 0);
const void* initialData = shadowHasContent ? hostBase : nullptr;
if (resource->pendingRespecify || !resource->storageInitialized || resource->storageSize != size) {
RespecifyStorageWith(*resource, size, usage, initialData, serial);