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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLChild.h"
#include "ClientWebGLContext.h"
#include "mozilla/StaticPrefs_webgl.h"
#include "WebGLMethodDispatcher.h"
namespace mozilla::dom {
WebGLChild::WebGLChild(ClientWebGLContext& context)
: mContext(&context),
mDefaultCmdsShmemSize(StaticPrefs::webgl_out_of_process_shmem_size()) {}
WebGLChild::~WebGLChild() { (void)Send__delete__(this); }
void WebGLChild::ActorDestroy(ActorDestroyReason why) {
mPendingCmdsShmem = {};
}
// -
Maybe<Range<uint8_t>> WebGLChild::AllocPendingCmdBytes(const size_t size) {
if (!mPendingCmdsShmem) {
size_t capacity = mDefaultCmdsShmemSize;
if (capacity < size) {
capacity = size;
}
auto shmem = webgl::RaiiShmem::Alloc(
this, capacity,
mozilla::ipc::SharedMemory::SharedMemoryType::TYPE_BASIC);
if (!shmem) {
NS_WARNING("Failed to alloc shmem for AllocPendingCmdBytes.");
return {};
}
mPendingCmdsShmem = std::move(shmem);
mPendingCmdsPos = 0;
}
const auto range = mPendingCmdsShmem.ByteRange();
auto itr = range.begin() + mPendingCmdsPos;
const auto offset = AlignmentOffset(kUniversalAlignment, itr.get());
mPendingCmdsPos += offset;
const auto required = mPendingCmdsPos + size;
if (required > range.length()) {
FlushPendingCmds();
return AllocPendingCmdBytes(size);
}
itr = range.begin() + mPendingCmdsPos;
const auto remaining = Range<uint8_t>{itr, range.end()};
mPendingCmdsPos += size;
return Some(Range<uint8_t>{remaining.begin(), remaining.begin() + size});
}
void WebGLChild::FlushPendingCmds() {
if (!mPendingCmdsShmem) return;
const auto byteSize = mPendingCmdsPos;
SendDispatchCommands(mPendingCmdsShmem.Extract(), byteSize);
mFlushedCmdInfo.flushes += 1;
mFlushedCmdInfo.flushedCmdBytes += byteSize;
if (gl::GLContext::ShouldSpew()) {
printf_stderr("[WebGLChild] Flushed %zu bytes. (%zu over %zu flushes)\n",
byteSize, mFlushedCmdInfo.flushedCmdBytes,
mFlushedCmdInfo.flushes);
}
}
// -
mozilla::ipc::IPCResult WebGLChild::RecvJsWarning(
const std::string& text) const {
if (!mContext) return IPC_OK();
mContext->JsWarning(text);
return IPC_OK();
}
mozilla::ipc::IPCResult WebGLChild::RecvOnContextLoss(
const webgl::ContextLossReason reason) const {
if (!mContext) return IPC_OK();
mContext->OnContextLoss(reason);
return IPC_OK();
}
} // namespace mozilla::dom
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