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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
commit0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch)
treea31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /dom/canvas/WebGLChild.cpp
parentInitial commit. (diff)
downloadfirefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz
firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/canvas/WebGLChild.cpp')
-rw-r--r--dom/canvas/WebGLChild.cpp109
1 files changed, 109 insertions, 0 deletions
diff --git a/dom/canvas/WebGLChild.cpp b/dom/canvas/WebGLChild.cpp
new file mode 100644
index 0000000000..f330ebabd3
--- /dev/null
+++ b/dom/canvas/WebGLChild.cpp
@@ -0,0 +1,109 @@
+/* -*- 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, const size_t fyiAlignmentOverhead) {
+ if (!mPendingCmdsShmem.Size()) {
+ size_t capacity = mDefaultCmdsShmemSize;
+ if (capacity < size) {
+ capacity = size;
+ }
+
+ mPendingCmdsShmem = mozilla::ipc::BigBuffer::TryAlloc(capacity);
+ if (!mPendingCmdsShmem.Size()) {
+ NS_WARNING("Failed to alloc shmem for AllocPendingCmdBytes.");
+ return {};
+ }
+ mPendingCmdsPos = 0;
+ mPendingCmdsAlignmentOverhead = 0;
+
+ if (kIsDebug) {
+ const auto ptr = mPendingCmdsShmem.Data();
+ const auto initialOffset = AlignmentOffset(kUniversalAlignment, ptr);
+ MOZ_ALWAYS_TRUE(!initialOffset);
+ }
+ }
+
+ const auto range = Range<uint8_t>{mPendingCmdsShmem.AsSpan()};
+
+ auto itr = range.begin() + mPendingCmdsPos;
+ const auto offset = AlignmentOffset(kUniversalAlignment, itr.get());
+ mPendingCmdsPos += offset;
+ mPendingCmdsAlignmentOverhead += offset;
+ const auto required = mPendingCmdsPos + size;
+ if (required > range.length()) {
+ FlushPendingCmds();
+ return AllocPendingCmdBytes(size, fyiAlignmentOverhead);
+ }
+ itr = range.begin() + mPendingCmdsPos;
+ const auto remaining = Range<uint8_t>{itr, range.end()};
+ mPendingCmdsPos += size;
+ mPendingCmdsAlignmentOverhead += fyiAlignmentOverhead;
+ return Some(Range<uint8_t>{remaining.begin(), remaining.begin() + size});
+}
+
+void WebGLChild::FlushPendingCmds() {
+ if (!mPendingCmdsShmem.Size()) return;
+
+ const auto byteSize = mPendingCmdsPos;
+ SendDispatchCommands(std::move(mPendingCmdsShmem), byteSize);
+ mPendingCmdsShmem = {};
+
+ mFlushedCmdInfo.flushes += 1;
+ mFlushedCmdInfo.flushedCmdBytes += byteSize;
+ mFlushedCmdInfo.overhead += mPendingCmdsAlignmentOverhead;
+
+ if (gl::GLContext::ShouldSpew()) {
+ const auto overheadRatio = float(mPendingCmdsAlignmentOverhead) /
+ (byteSize - mPendingCmdsAlignmentOverhead);
+ const auto totalOverheadRatio =
+ float(mFlushedCmdInfo.overhead) /
+ (mFlushedCmdInfo.flushedCmdBytes - mFlushedCmdInfo.overhead);
+ printf_stderr(
+ "[WebGLChild] Flushed %zu (%zu=%.2f%% overhead) bytes."
+ " (%zu (%.2f%% overhead) over %zu flushes)\n",
+ byteSize, mPendingCmdsAlignmentOverhead, 100 * overheadRatio,
+ mFlushedCmdInfo.flushedCmdBytes, 100 * totalOverheadRatio,
+ 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