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[Refactor] (P13 W6d): Espryt's family arm predicates fold to the record arm, checked once at capability bring-up, and the frontend-arm walks they selected go.

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swung0x48
2026-10-06 18:08:33 -04:00
parent dc1e95b4c3
commit 8abae647d0
7 changed files with 698 additions and 2708 deletions
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MobileGL/MG_Backend/DirectGLES/MultiDraw.cpp
+30 -63
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@@ -177,75 +177,42 @@ namespace MobileGL::MG_Backend::DirectGLES::MultiDrawImpl {
BoundIndexBufferView ResolveBoundIndexBuffer(IndexBufferQuestion question, const char* entry) {
BoundIndexBufferView view;
if (BufferImpl::VertexInputReadsRecords()) {
const auto& st = MG_Pipe::MGPipeApplier();
const MG_Pipe::MGPipeHandle res = BufferImpl::ResolveDrawIndexBufferFromRecord(st).Res;
// A null Res is "no element array buffer bound", exactly as a null frontend slot
// is on the arm below - the batch's indices are a client array, and every caller
// already has an arm for that. It is NOT the arm test; the arm was decided above.
if (MG_Pipe::MGPipeHandleIsNull(res)) return view;
view.Present = true;
if (question == IndexBufferQuestion::Presence) return view;
const auto& st = MG_Pipe::MGPipeApplier();
const MG_Pipe::MGPipeHandle res = BufferImpl::ResolveDrawIndexBufferFromRecord(st).Res;
// A null Res is "no element array buffer bound", exactly as a null frontend slot
// is on the arm below - the batch's indices are a client array, and every caller
// already has an arm for that. It is NOT the arm test; the arm was decided above.
if (MG_Pipe::MGPipeHandleIsNull(res)) return view;
view.Present = true;
if (question == IndexBufferQuestion::Presence) return view;
if (question == IndexBufferQuestion::HostBytes) {
// The applier has already consumed the persistent-map blocks for this
// resource before the draw verb replayed; the one Sync* this arm owes is the
// monolith's SyncGpuWrites, and (P8-C) SplitHostBytesForCpuRead is it: a store
// a shader wrote on this side is read back from this server's own GL buffer,
// because no writeback ever reaches the server's staged copy. That is also why
// this arm cannot be expressed as "find the object and run the monolith body".
auto* resource = BufferImpl::FindBufferResourceForHandle(res);
if (resource == nullptr) RefuseMissingIndexBufferRecord(entry, res, "backend resource");
view.Size = BufferImpl::ResourceWidthForHandle(res);
view.HostBytes = BufferImpl::SplitHostBytesForCpuRead(*resource, res, "multidraw_index_rebase");
if (view.HostBytes != nullptr && IndexBufferRecordHasDefinedContent(st, res)) {
BufferImpl::RequireStagedCoverage(*resource, view.HostBytes, 0, view.Size,
"multidraw_index_rebase");
}
// A null HostBytes is not a refusal: MappedData() on the monolith arm is
// equally allowed to be null (an adopted coherent map keeps its bytes
// elsewhere), and the one caller that asks declines the tier for it.
return view;
}
auto* resource = BufferImpl::EnsureBufferResourceForHandle(nullptr, res);
if (question == IndexBufferQuestion::HostBytes) {
// The applier has already consumed the persistent-map blocks for this
// resource before the draw verb replayed; the one Sync* this arm owes is the
// monolith's SyncGpuWrites, and (P8-C) SplitHostBytesForCpuRead is it: a store
// a shader wrote on this side is read back from this server's own GL buffer,
// because no writeback ever reaches the server's staged copy. That is also why
// this arm cannot be expressed as "find the object and run the monolith body".
auto* resource = BufferImpl::FindBufferResourceForHandle(res);
if (resource == nullptr) RefuseMissingIndexBufferRecord(entry, res, "backend resource");
view.Id = resource->id;
if (question == IndexBufferQuestion::DriverNameAndSize) {
view.Size = BufferImpl::ResourceWidthForHandle(res);
view.Size = BufferImpl::ResourceWidthForHandle(res);
view.HostBytes = BufferImpl::SplitHostBytesForCpuRead(*resource, res, "multidraw_index_rebase");
if (view.HostBytes != nullptr && IndexBufferRecordHasDefinedContent(st, res)) {
BufferImpl::RequireStagedCoverage(*resource, view.HostBytes, 0, view.Size,
"multidraw_index_rebase");
}
// A null HostBytes is not a refusal: MappedData() on the monolith arm is
// equally allowed to be null (an adopted coherent map keeps its bytes
// elsewhere), and the one caller that asks declines the tier for it.
return view;
}
// MONOLITH GLUE from here down, token for token what each call site did before.
const auto& vao = MG_Pipe::gPipeInputs.GetBoundVertexArray();
if (!vao) return view;
const auto& ibo = vao->GetIndexBufferBindingSlot().GetBoundObject();
if (!ibo) return view;
view.Present = true;
switch (question) {
case IndexBufferQuestion::Presence:
break;
case IndexBufferQuestion::DriverName: {
const auto* resource = BufferImpl::EnsureBufferResource(ibo);
view.Id = resource ? resource->id : 0;
break;
auto* resource = BufferImpl::EnsureBufferResourceForHandle(nullptr, res);
if (resource == nullptr) RefuseMissingIndexBufferRecord(entry, res, "backend resource");
view.Id = resource->id;
if (question == IndexBufferQuestion::DriverNameAndSize) {
view.Size = BufferImpl::ResourceWidthForHandle(res);
}
case IndexBufferQuestion::DriverNameAndSize: {
const auto* resource = BufferImpl::EnsureBufferResource(ibo);
view.Id = resource ? resource->id : 0;
view.Size = ibo->GetSize();
break;
}
case IndexBufferQuestion::HostBytes:
// The shadow is the source of truth for CPU reads, but a persistent map or
// a shader write may have moved past it since the last sync.
ibo->SyncPersistentMappedRange();
ibo->SyncGpuWrites();
view.HostBytes = ibo->MappedData();
view.Size = ibo->GetSize();
break;
}
(void)entry;
return view;
}