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[Feat] (MG_Remote, P5): land the client role - BackendObject_Remote, the 71-slot emit table, the caps mirror and the verb barrier

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swung0x48
2026-09-11 16:46:24 -04:00
parent bfaf5f9d0e
commit d628d906d1
18 changed files with 2235 additions and 71 deletions
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MobileGL/MG_Remote/Client/EmitTables.cpp
+494 -5
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@@ -6,13 +6,36 @@
// SPDX-License-Identifier: LGPL-3.0-only
// End of Source File Header
// P5 c0 stubs for package c1.
// P5 package c1: the 71-slot emit table.
//
// THE PARTITION IS CONTRACT-P5.md §7's AND IS NOT RE-DERIVED HERE (R-15, ID-12):
// class A 2 slots answered locally from the caps mirror, never emitted, never Fatal
// class B 5 slots emitted
// class C 64 slots Fatal{UnmigratedVerb, "<slot>"}
// The three counts are static_asserted to sum to kRemoteEmitSlotCount below, so a slot that
// changes class without changing the arithmetic is a build break rather than a behaviour
// change nobody reviewed.
//
// THE PRE-VERB HOOKS RUN BEFORE THE RECORD, NEVER AFTER (b1, ID-18). PushPersistentMapsBeforeVerb
// publishes the bytes an application wrote through a coherent map with no API call at all, and
// MarkGpuWritesForDraw builds the conservative GPU-write set the client now owns. Both describe
// the work the record is ABOUT TO START, so a hook deferred past its own record is the C-1
// regression re-committed at the transport layer.
#include "EmitTables.h"
#include "ClientSession.h"
#include "GpuWritePending.h"
#include "PersistentMapTracker.h"
#include <MG_Util/Converters/GLToMG/TextureEnumConverter.h>
#include <MG_Util/Debug/Log.h>
#include <MG_Util/Metrics/TextureMetrics.h>
#include <MG_State/GLState/Core.h>
#include <cstdlib>
#include <cstring>
namespace MobileGL::MG_Remote::Client {
@@ -36,12 +59,478 @@ namespace MobileGL::MG_Remote::Client {
std::abort();
}
namespace {
Bool g_dropClearEmission = false;
Uint64 g_droppedClearEmissions = 0;
// E2's control has to be armable from OUTSIDE the process that runs the replay, because
// the statement it makes is about a trace lane and not about a unit case: "drop one
// Clear emission and OpenRA's SSIM falls below 0.99". A recompile would make the control
// arm against source text, which is ID-22(a)'s defect.
//
// READ WITH getenv RATHER THAN THROUGH MG_Config, DELIBERATELY AND TEMPORARILY. Config.h
// is c0's and a new MOBILEGL_IPC_* knob goes through the integrator; this is a
// NEGATIVE-CONTROL switch no operator may ever set, and it announces itself at warning
// level every time it arms so it cannot be on by accident. Flagged for adoption into
// IpcTable if the integrator wants it there.
Bool ReadDropClearFromEnvironment() {
const char* value = std::getenv("MOBILEGL_IPC_E2_DROP_CLEAR");
const Bool armed = value != nullptr && value[0] == '1' && value[1] == '\0';
if (armed) {
MGLOG_W("MG_Remote client: MOBILEGL_IPC_E2_DROP_CLEAR=1 - E2's NEGATIVE CONTROL is "
"armed and every glClear will be DROPPED on the wire. This arm is expected "
"to fail its SSIM threshold; a lane that stays green with it set is not "
"going through the wire at all");
}
return armed;
}
// ---- the session, demanded rather than assumed --------------------------------
//
// Every class-B slot needs one. A null session here is NOT the monolith answer - the
// monolith answer is that this table was never installed at all, because
// MG_Backend::Init() only reaches BackendObject_Remote when the transport resolved. So
// a null one is a Fatal by name and not a fall-through to the driver: a pass-through
// slot is the "split lane ran monolith and went green" shape that every gate in this
// phase exists to prevent (R-4).
ClientSession& RequireSession(const char* slot) {
ClientSession* session = ClientSession::Active();
if (session == nullptr) {
MGLOG_F("MGPipe: Fatal{NoClientSession, \"%s\"} - the remote emit table is "
"installed but no ClientSession is active. A slot may not fall through "
"to a driver this role does not have",
slot);
std::abort();
}
return *session;
}
// The two hooks b1 wrote and deliberately left with no caller, because the call site is
// this file's. ORDER: the push first (it produces resource_subdata records that must
// precede the verb on SEG_CMD), then the mark walk, then the verb record.
void BeforeDrawVerb() {
PushPersistentMapsBeforeVerb();
MarkGpuWritesForDraw();
}
// A verb that reads buffers but starts no shader: clear, blit, readback, present. The
// push still has to run - a coherent map is read by the GPU on any of them - but there
// is no shader that could write one, so no mark walk.
void BeforeReadOnlyVerb() { PushPersistentMapsBeforeVerb(); }
// =============================================================================
// CLASS B - the five slots the verb census measured (CONTRACT-P5.md §7)
// =============================================================================
void EmitClear(GLbitfield mask) {
ClientSession& session = RequireSession("Clear");
BeforeReadOnlyVerb();
if (g_dropClearEmission) {
// E2's negative control. Everything above still ran, so the only difference
// between this arm and the live one is the record - which is exactly the
// statement "the picture comes from the wire" that E2 exists to prove.
++g_droppedClearEmissions;
return;
}
MG_Pipe::MGPClear record{};
// The DRAW framebuffer is whatever the server's own SyncRenderState resolves from
// gPipeInputs, which the client's MGP_FILL(Clear) at GL_Drawing.cpp:534 has just
// written and the verb barrier keeps still (R-1). Naming a handle here would be a
// SECOND statement of the binding, and the second one is the one that goes stale.
record.Fbo = MG_Pipe::kMGPipeNullHandle;
record.Kind = kRemoteClearWhole;
record.DrawBufferIndex = -1;
record.BufferMask = static_cast<Uint32>(mask);
record.ValueClass = 0;
session.EmitAndWait(MG_Pipe::MGPWireOp::Clear, &record, sizeof(record), nullptr, 0,
nullptr, 0, nullptr);
}
void EmitDrawArrays(GLenum mode, GLint first, GLsizei count) {
ClientSession& session = RequireSession("DrawArrays");
BeforeDrawVerb();
MG_Pipe::MGPDrawInfo info{};
info.Mode = static_cast<Uint32>(mode);
info.IndexSize = 0; // arrays
info.Flags = 0; // NO kDrawHasUserIndices: the reduced path draws from a VBO
info.InstanceCount = 1;
info.StartInstance = 0;
info.RestartIndex = 0;
info.DrawIdOffset = 0;
info.IndexResource = MG_Pipe::kMGPipeNullHandle;
info.MinIndex = ~0u; // "unknown", MGPipeTypes.h:1330
info.MaxIndex = ~0u;
info.XfbCpuCapturedVertices = 0;
info.NumDraws = 1;
const MG_Pipe::MGPDrawRange range{static_cast<Uint32>(first), static_cast<Uint32>(count), 0};
// One tail of exactly NumDraws entries. w1's encoder recomputes that from the
// payload and Fatals on a disagreement, on THIS side - so a NumDraws that drifted
// from the tail is a producer-side abort rather than a corrupt stream a peer has to
// diagnose.
session.EmitAndWait(MG_Pipe::MGPWireOp::DrawVbo, &info, sizeof(info), &range,
sizeof(range), nullptr, 0, nullptr);
}
void EmitBlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0,
GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask,
GLenum filter) {
ClientSession& session = RequireSession("BlitFramebuffer");
BeforeReadOnlyVerb();
MG_Pipe::MGPBlit record{};
// Same reasoning as Clear's Fbo: the read and draw bindings are gPipeInputs', set
// by MGP_FILL(BlitFramebuffer) at GL_Framebuffer.cpp:660 and held still by the
// barrier. glBlitNamedFramebuffer, which DOES name two framebuffers, is class C.
record.ReadFbo = MG_Pipe::kMGPipeNullHandle;
record.DrawFbo = MG_Pipe::kMGPipeNullHandle;
record.SrcX0 = srcX0;
record.SrcY0 = srcY0;
record.SrcX1 = srcX1;
record.SrcY1 = srcY1;
record.DstX0 = dstX0;
record.DstY0 = dstY0;
record.DstX1 = dstX1;
record.DstY1 = dstY1;
record.Mask = static_cast<Uint32>(mask);
record.Filter = static_cast<Uint32>(filter);
session.EmitAndWait(MG_Pipe::MGPWireOp::Blit, &record, sizeof(record), nullptr, 0,
nullptr, 0, nullptr);
}
// How many bytes glReadPixels will pack for this rectangle, from the PACK half of the
// pixel-store state. The client has to declare it - MGPReadbackInfo::DstSize is what
// sizes the reply and what the client checks against MaxReplyBytes() BEFORE it emits,
// because a reply bigger than a slot is Fatal rather than chunked (s1's ReplySlot.h).
//
// GL 4.6 8.4.4's arithmetic, and nothing cleverer: a row is rounded up to Alignment,
// the LAST row is not padded, and SkipRows/SkipPixels/SkipImages shift the destination
// rather than growing it (the application owns those bytes and we never write them).
Uint64 PackedReadbackBytes(GLsizei width, GLsizei height, GLenum format, GLenum type) {
if (width <= 0 || height <= 0) return 0;
const TextureInputFormat inputFormat =
MG_Util::ConvertGLEnumToTextureInputFormat(format);
const TexturePixelDataType dataType = MG_Util::ConvertGLEnumToTexturePixelDataType(type);
const SizeT bytesPerPixel = MG_Util::GetInputBytesPerPixel(inputFormat, dataType);
if (bytesPerPixel == 0) {
// NOT a guess and not a zero-length reply. A format this build cannot size is a
// readback whose answer would be silently truncated, which is the one failure a
// picture comparison cannot see.
MGLOG_F("MGPipe: Fatal{UnsizedReadback, \"read_pixels\"} format=0x%04x type=0x%04x "
"- the client must declare MGPReadbackInfo::DstSize and cannot size this "
"pair; P5's reduced path reads RGBA/UNSIGNED_BYTE",
static_cast<unsigned>(format), static_cast<unsigned>(type));
std::abort();
}
PixelStoreParameters pack{};
if (MG_State::pGLContext != nullptr) {
pack = MG_State::pGLContext->GetPixelStoreParameters(/*isUnpack=*/false);
}
const Uint64 rowPixels =
pack.RowLength > 0 ? static_cast<Uint64>(pack.RowLength) : static_cast<Uint64>(width);
const Uint64 alignment = pack.Alignment > 0 ? static_cast<Uint64>(pack.Alignment) : 1ull;
const Uint64 rowBytes = rowPixels * static_cast<Uint64>(bytesPerPixel);
const Uint64 paddedRow = ((rowBytes + alignment - 1) / alignment) * alignment;
const Uint64 lastRow = static_cast<Uint64>(width) * static_cast<Uint64>(bytesPerPixel);
return paddedRow * (static_cast<Uint64>(height) - 1) + lastRow;
}
void EmitReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
GLenum type, void* pixels) {
ClientSession& session = RequireSession("ReadPixels");
BeforeReadOnlyVerb();
// THE PBO HALF IS b1's DESIGN AND b1 ALREADY WIRED ITS MARK, at
// GL_Framebuffer.cpp:3109 - immediately after this table call returns, inside
// ReadPixels_Backend itself. So this emitter deliberately does NOT call
// MarkReadPixelsPackBuffer(): a second call there would be the "wire it twice"
// shape, and the per-row counter b1's unit cases assert on would then count one
// read as two.
const Uint64 bytes = PackedReadbackBytes(width, height, format, type);
MG_Pipe::MGPReadbackInfo info{};
info.Res = MG_Pipe::kMGPipeNullHandle; // "the bound read surface answers"
info.Box = MG_Pipe::MGPBox{x, y, 0, static_cast<Uint32>(width),
static_cast<Uint32>(height), 1};
info.Format = static_cast<Uint32>(format);
info.Type = static_cast<Uint32>(type);
info.Target = 0;
info.Level = 0;
info.DstOffset = 0;
info.DstSize = bytes;
// CHECKED BEFORE THE EMISSION, not after the answer. A reply bigger than a slot is
// Fatal on the server, and a Fatal there is a dead apply thread with a client
// parked in the barrier for ever; here it is one line naming the number.
const Uint64 capacity = session.MaxReplyBytes();
if (bytes > capacity) {
MGLOG_F("MGPipe: Fatal{ReplyTooLarge, \"read_pixels\"} %llu bytes into a %llu-byte "
"reply slot - P5 does not chunk a readback (R-10); raise the reply pool's "
"slot size or shrink the read",
static_cast<unsigned long long>(bytes),
static_cast<unsigned long long>(capacity));
std::abort();
}
Int32 status = 0;
// The pixels land straight in the application's buffer: the barrier's wait IS the
// reply's wait (R-3), so this costs no round trip beyond the one the barrier was
// already paying.
session.EmitAndWait(MG_Pipe::MGPWireOp::ReadPixels, &info, sizeof(info), nullptr, 0,
pixels, bytes, &status);
}
void EmitPresent() {
ClientSession& session = RequireSession("Present");
BeforeReadOnlyVerb();
MG_Pipe::MGPPresent record{};
// FrameSerial 0 = "the server stamps its own". P5 has no client-side present credit
// (MOBILEGL_IPC_PRESENT_CREDIT is P6's), so a client-minted serial would be a second
// id space with no consumer.
record.FrameSerial = 0;
session.EmitAndWait(MG_Pipe::MGPWireOp::Present, &record, sizeof(record), nullptr, 0,
nullptr, 0, nullptr);
// R-12's invalidation edge, drained at the one boundary every target crosses. A
// second CapsSnapshot IS the invalidation; nothing else on the client can see that
// the server re-ran InitCapabilities, because GLContext::GetCompileEnv()'s memo is
// keyed on pActiveBackendObject.get() (Core.cpp:34) and that pointer never changes
// under split.
session.PumpControlPlane();
}
// =============================================================================
// CLASS A - answered locally from the caps mirror (R-15). NO RECORD, EVER.
// =============================================================================
void AnswerGetIntegeri_v(GLenum target, GLuint index, GLint* data) {
if (data == nullptr) return;
const MG_Backend::DynamicBackendParameters& dynamic = CapsMirrorInstance().Dynamic();
// The ONLY two indexed pnames the device owns; every other indexed pname names
// frontend state and is answered in GL_Getter::GetIntegeri_v before any table is
// consulted (BackendObject.h:196-205). The existing gate is
// AdvertisedLimitsScenario.ComputeWorkGroupLimitsAreTheCapsBlocksAnswer, which pins
// that this answer and the caps copy are ONE number.
switch (target) {
case GL_MAX_COMPUTE_WORK_GROUP_COUNT:
if (index < 3) *data = static_cast<GLint>(dynamic.MaxComputeWorkGroupCount[index]);
return;
case GL_MAX_COMPUTE_WORK_GROUP_SIZE:
if (index < 3) *data = static_cast<GLint>(dynamic.MaxComputeWorkGroupSize[index]);
return;
default:
// Not a Fatal: the slot's own contract is "whatever pname the frontend has no
// case for at all", and the monolith backends answer such a pname by leaving
// the driver's own default in place. Answering a wrong number would be worse
// than answering none.
MGLOG_W_ONCE("MG_Remote client: GetIntegeri_v(0x%04x, %u) is not one of the two "
"device-owned indexed pnames and has no caps-mirror answer",
static_cast<unsigned>(target), static_cast<unsigned>(index));
return;
}
}
Bool AnswerIsTimerQuerySupported() {
// A capability predicate, not a call. Today a null slot means COUNTER_BITS == 0
// (GL_Query.cpp:792) - which is precisely the null check R-4 forbids, so it moves
// here, to the bit the server published.
return CapsMirrorInstance().HasCap(MG_Pipe::kCapTimerQuery);
}
// =============================================================================
// CLASS C - Fatal{UnmigratedVerb}. 64 slots: 63 in GLFunctionsTable + SetSwapInterval.
// =============================================================================
//
// The list is an X-macro so the DEFINITION and the ASSIGNMENT cannot drift apart, and
// so the count is arithmetic rather than a comment. Two of them carry a pre-verb hook
// before the Fatal - see the note on DispatchCompute.
#define MGR_UNMIGRATED_GL_SLOTS(X) \
X(DrawElements, void, (GLenum, GLsizei, GLenum, const void*)) \
X(DrawElementsBaseVertex, void, (GLenum, GLsizei, GLenum, const void*, GLint)) \
X(MultiDrawArrays, void, (GLenum, const GLint*, const GLsizei*, GLsizei)) \
X(MultiDrawElements, void, (GLenum, const GLsizei*, GLenum, const GLvoid* const*, GLsizei)) \
X(MultiDrawElementsBaseVertex, void, \
(GLenum, const GLsizei*, GLenum, const GLvoid* const*, GLsizei, const GLint*)) \
X(MultiDrawElementsIndirect, void, (GLenum, GLenum, const void*, GLsizei, GLsizei)) \
X(MultiDrawArraysIndirect, void, (GLenum, const void*, GLsizei, GLsizei)) \
X(MultiDrawElementsIndirectCount, void, (GLenum, GLenum, const void*, GLintptr, GLsizei, GLsizei)) \
X(MultiDrawArraysIndirectCount, void, (GLenum, const void*, GLintptr, GLsizei, GLsizei)) \
X(DrawRangeElementsBaseVertex, void, \
(GLenum, GLuint, GLuint, GLsizei, GLenum, const void*, GLint)) \
X(DrawRangeElements, void, (GLenum, GLuint, GLuint, GLsizei, GLenum, const void*)) \
X(DrawElementsInstancedBaseVertexBaseInstance, void, \
(GLenum, GLsizei, GLenum, const void*, GLsizei, GLint, GLuint)) \
X(DrawElementsInstancedBaseVertex, void, (GLenum, GLsizei, GLenum, const void*, GLsizei, GLint)) \
X(DrawElementsInstancedBaseInstance, void, \
(GLenum, GLsizei, GLenum, const void*, GLsizei, GLuint)) \
X(DrawElementsInstanced, void, (GLenum, GLsizei, GLenum, const void*, GLsizei)) \
X(DrawArraysInstancedBaseInstance, void, (GLenum, GLint, GLsizei, GLsizei, GLuint)) \
X(DrawArraysInstanced, void, (GLenum, GLint, GLsizei, GLsizei)) \
X(DrawElementsIndirect, void, (GLenum, GLenum, const void*)) \
X(DrawArraysIndirect, void, (GLenum, const void*)) \
X(ClearBufferfi, void, (GLenum, GLint, GLfloat, GLint)) \
X(ClearBufferfv, void, (GLenum, GLint, const GLfloat*)) \
X(ClearBufferuiv, void, (GLenum, GLint, const GLuint*)) \
X(ClearBufferiv, void, (GLenum, GLint, const GLint*)) \
X(ClearNamedFramebufferfv, void, \
(const SharedPtr<MG_State::GLState::FramebufferObject>&, GLenum, GLint, const GLfloat*)) \
X(ClearNamedFramebufferfi, void, \
(const SharedPtr<MG_State::GLState::FramebufferObject>&, GLenum, GLint, GLfloat, GLint)) \
X(ClearNamedFramebufferiv, void, \
(const SharedPtr<MG_State::GLState::FramebufferObject>&, GLenum, GLint, const GLint*)) \
X(ClearNamedFramebufferuiv, void, \
(const SharedPtr<MG_State::GLState::FramebufferObject>&, GLenum, GLint, const GLuint*)) \
X(BlitNamedFramebuffer, void, \
(const SharedPtr<MG_State::GLState::FramebufferObject>&, \
const SharedPtr<MG_State::GLState::FramebufferObject>&, GLint, GLint, GLint, GLint, GLint, \
GLint, GLint, GLint, GLbitfield, GLenum)) \
X(CopyTexImage2D, void, (GLenum, GLint, GLenum, GLint, GLint, GLsizei, GLsizei, GLint)) \
X(CopyTexSubImage2D, void, (GLenum, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei)) \
X(CopyImageSubData, void, \
(const MG_Backend::CopyImageEndpoint&, GLenum, GLint, GLint, GLint, GLint, \
const MG_Backend::CopyImageEndpoint&, GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, \
GLsizei)) \
X(GenerateMipmap, void, (GLenum)) \
X(GetTexImage, void, (GLenum, GLint, GLenum, GLenum, GLvoid*)) \
X(GetTextureImage, void, \
(const SharedPtr<MG_State::GLState::ITextureObject>&, TextureUploadTarget, GLint, GLenum, \
GLenum, GLsizei, GLvoid*)) \
X(MemoryBarrier, void, (GLbitfield)) \
X(MemoryBarrierByRegion, void, (GLbitfield)) \
X(BindImageTexture, void, (GLuint, GLuint, GLint, GLboolean, GLint, GLenum, GLenum)) \
X(ShaderStorageBlockBinding, void, (GLuint, const GLchar*, GLuint)) \
X(WaitSync, void, (MG_Backend::BackendSyncHandle, GLbitfield, GLuint64)) \
X(DeleteSync, void, (MG_Backend::BackendSyncHandle)) \
X(EndTimeElapsedQuery, void, (MG_Backend::BackendQueryHandle)) \
X(DeleteBackendQuery, void, (MG_Backend::BackendQueryHandle)) \
X(EndOcclusionQuery, void, (MG_Backend::BackendQueryHandle)) \
X(EndXfbPrimitivesQuery, void, (MG_Backend::BackendQueryHandle)) \
X(PatchParameteri, void, (GLenum, GLint)) \
X(BeginTransformFeedback, void, (GLenum)) \
X(EndTransformFeedback, void, ()) \
X(PauseTransformFeedback, void, ()) \
X(ResumeTransformFeedback, void, ()) \
X(BindTransformFeedback, void, (GLuint)) \
X(DeleteTransformFeedback, void, (GLuint))
// The non-void ones, kept apart only because the macro body differs: a [[noreturn]]
// call is a complete body for a void slot and for a value-returning one alike, but a
// compiler that does not see UnmigratedVerbFatal's attribute through the macro would
// warn on the second. It does see it; they are split for readability.
#define MGR_UNMIGRATED_GL_VALUE_SLOTS(X) \
X(FenceSync, MG_Backend::BackendSyncHandle, ()) \
X(ClientWaitSync, GLenum, (MG_Backend::BackendSyncHandle, GLbitfield, GLuint64)) \
X(GetSyncStatus, Bool, (MG_Backend::BackendSyncHandle)) \
X(BeginTimeElapsedQuery, MG_Backend::BackendQueryHandle, ()) \
X(QueryCounterTimestamp, MG_Backend::BackendQueryHandle, ()) \
X(IsQueryResultAvailable, Bool, (MG_Backend::BackendQueryHandle)) \
X(GetQueryResult64, Bool, (MG_Backend::BackendQueryHandle, Bool, Uint64*)) \
X(BeginOcclusionQuery, MG_Backend::BackendQueryHandle, ()) \
X(BeginXfbPrimitivesQuery, MG_Backend::BackendQueryHandle, (Bool)) \
X(GetGpuTimestampNs, Int64, ())
#define MGR_DEFINE_UNMIGRATED(Name, Ret, Sig) \
Ret Name##_Unmigrated Sig { UnmigratedVerbFatal(#Name); }
MGR_UNMIGRATED_GL_SLOTS(MGR_DEFINE_UNMIGRATED)
MGR_UNMIGRATED_GL_VALUE_SLOTS(MGR_DEFINE_UNMIGRATED)
#undef MGR_DEFINE_UNMIGRATED
// THE TWO COMPUTE SLOTS CARRY b1's DISPATCH HOOK BEFORE THE FATAL, and this is stated
// rather than hidden. MarkGpuWritesForDispatch() belongs immediately before the
// dispatch record, and the dispatch record is class C in P5 - so the call site is here,
// in the right place, and is UNREACHABLE-IN-EFFECT: the abort follows it. There is no
// gate on it and this file says so; the phase that moves DispatchCompute into class B
// replaces the Fatal and inherits a call site that is already correct rather than
// discovering that the mark walk was never wired.
void DispatchCompute_Unmigrated(GLuint, GLuint, GLuint) {
PushPersistentMapsBeforeVerb();
MarkGpuWritesForDispatch();
UnmigratedVerbFatal("DispatchCompute");
}
void DispatchComputeIndirect_Unmigrated(GLintptr) {
PushPersistentMapsBeforeVerb();
MarkGpuWritesForDispatch();
UnmigratedVerbFatal("DispatchComputeIndirect");
}
void SetSwapInterval_Unmigrated(Int) { UnmigratedVerbFatal("SetSwapInterval"); }
// The counts, as arithmetic. MGR_COUNT_ONE expands to `+ 1` per row.
#define MGR_COUNT_ONE(Name, Ret, Sig) +1
constexpr Uint32 kUnmigratedListedSlots =
0 MGR_UNMIGRATED_GL_SLOTS(MGR_COUNT_ONE) MGR_UNMIGRATED_GL_VALUE_SLOTS(MGR_COUNT_ONE);
#undef MGR_COUNT_ONE
// + DispatchCompute, DispatchComputeIndirect, SetSwapInterval, written out by hand
// because they carry a body the macro cannot.
constexpr Uint32 kUnmigratedSlots = kUnmigratedListedSlots + 3;
constexpr Uint32 kLocallyAnsweredSlots = 2; // GetIntegeri_v, IsTimerQuerySupported
constexpr Uint32 kEmittedSlots = 5; // Clear, DrawArrays, ReadPixels, Blit, Present
static_assert(kUnmigratedSlots == 64, "CONTRACT-P5.md §7 class C is 64 slots");
static_assert(kLocallyAnsweredSlots + kEmittedSlots + kUnmigratedSlots == kRemoteEmitSlotCount,
"the three classes no longer partition the 71 slots");
MG_Backend::GlobalBackendFunctionsTable BuildRemoteEmitTable() {
g_dropClearEmission = ReadDropClearFromEnvironment();
MG_Backend::GlobalBackendFunctionsTable table{};
// ---- class C first, so that a slot forgotten below stays Fatal rather than null.
// Order matters for exactly this reason: if class B's assignment were first, a
// typo in class C would leave a NULL slot, and a null slot is 91 potential null
// calls with no diagnostic. This way the worst a mistake can do is name a verb
// that was supposed to be emitted, loudly.
#define MGR_ASSIGN_UNMIGRATED(Name, Ret, Sig) table.GL.Name = &Name##_Unmigrated;
MGR_UNMIGRATED_GL_SLOTS(MGR_ASSIGN_UNMIGRATED)
MGR_UNMIGRATED_GL_VALUE_SLOTS(MGR_ASSIGN_UNMIGRATED)
#undef MGR_ASSIGN_UNMIGRATED
table.GL.DispatchCompute = &DispatchCompute_Unmigrated;
table.GL.DispatchComputeIndirect = &DispatchComputeIndirect_Unmigrated;
table.SetSwapInterval = &SetSwapInterval_Unmigrated;
// ---- class A
table.GL.GetIntegeri_v = &AnswerGetIntegeri_v;
table.GL.IsTimerQuerySupported = &AnswerIsTimerQuerySupported;
// NOT A SLOT and not a verb: a Bool member of the table, whose one non-test client
// reader is GL_Query.cpp:221. It does NOT ride inside MGPCaps::Dynamic - it is a
// member of GLFunctionsTable, which is exactly the thing a split client never
// receives - so it is answered from kCapCpuXfbPrimitiveAccounting.
table.GL.PrefersCpuXfbPrimitiveAccounting =
CapsMirrorInstance().PrefersCpuXfbPrimitiveAccounting();
// ---- class B
table.GL.Clear = &EmitClear;
table.GL.DrawArrays = &EmitDrawArrays;
table.GL.ReadPixels = &EmitReadPixels;
table.GL.BlitFramebuffer = &EmitBlitFramebuffer;
table.Present = &EmitPresent;
return table;
}
} // namespace
const MG_Backend::GlobalBackendFunctionsTable& RemoteEmitTable() {
MGLOG_F("MGPipe: Fatal{UnimplementedEmitTable, \"RemoteEmitTable\"} - P5 package c1 has "
"not landed this yet; c0 shipped the signature only");
std::abort();
// Leaked at exit like every other MG_Remote singleton (ID-8): MG_Backend::Init()
// copies it into gBackendFunctionsTable and MobileGL::Destroy() clears that copy from
// an exit handler, by which point a static destructor here would already have run.
static const MG_Backend::GlobalBackendFunctionsTable& table =
*new MG_Backend::GlobalBackendFunctionsTable{BuildRemoteEmitTable()};
return table;
}
Uint32 ImplementedVerbCount() { return 0; }
Uint32 ImplementedVerbCount() { return kEmittedSlots; }
Uint32 LocallyAnsweredSlotCount() { return kLocallyAnsweredSlots; }
Uint32 UnmigratedSlotCount() { return kUnmigratedSlots; }
void SetDropClearEmissionForNegativeControl(Bool drop) { g_dropClearEmission = drop; }
Uint64 DroppedClearEmissions() { return g_droppedClearEmissions; }
} // namespace MobileGL::MG_Remote::Client