Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 408 insertions, 0 deletions

diff --git a/dom/canvas/WebGLBuffer.cpp b/dom/canvas/WebGLBuffer.cpp
new file mode 100644
index 0000000000..54b044738a
--- /dev/null
+++ b/dom/canvas/WebGLBuffer.cpp
@@ -0,0 +1,408 @@
+/* -*- 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 "WebGLBuffer.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "WebGLContext.h"
+
+namespace mozilla {
+
+WebGLBuffer::WebGLBuffer(WebGLContext* webgl, GLuint buf)
+    : WebGLContextBoundObject(webgl), mGLName(buf) {}
+
+WebGLBuffer::~WebGLBuffer() {
+  mByteLength = 0;
+  mFetchInvalidator.InvalidateCaches();
+
+  mIndexCache = nullptr;
+  mIndexRanges.clear();
+
+  if (!mContext) return;
+  mContext->gl->fDeleteBuffers(1, &mGLName);
+}
+
+void WebGLBuffer::SetContentAfterBind(GLenum target) {
+  if (mContent != Kind::Undefined) return;
+
+  switch (target) {
+    case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
+      mContent = Kind::ElementArray;
+      break;
+
+    case LOCAL_GL_ARRAY_BUFFER:
+    case LOCAL_GL_PIXEL_PACK_BUFFER:
+    case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+    case LOCAL_GL_UNIFORM_BUFFER:
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+    case LOCAL_GL_COPY_READ_BUFFER:
+    case LOCAL_GL_COPY_WRITE_BUFFER:
+      mContent = Kind::OtherData;
+      break;
+
+    default:
+      MOZ_CRASH("GFX: invalid target");
+  }
+}
+
+////////////////////////////////////////
+
+static bool ValidateBufferUsageEnum(WebGLContext* webgl, GLenum usage) {
+  switch (usage) {
+    case LOCAL_GL_STREAM_DRAW:
+    case LOCAL_GL_STATIC_DRAW:
+    case LOCAL_GL_DYNAMIC_DRAW:
+      return true;
+
+    case LOCAL_GL_DYNAMIC_COPY:
+    case LOCAL_GL_DYNAMIC_READ:
+    case LOCAL_GL_STATIC_COPY:
+    case LOCAL_GL_STATIC_READ:
+    case LOCAL_GL_STREAM_COPY:
+    case LOCAL_GL_STREAM_READ:
+      if (MOZ_LIKELY(webgl->IsWebGL2())) return true;
+      break;
+
+    default:
+      break;
+  }
+
+  webgl->ErrorInvalidEnumInfo("usage", usage);
+  return false;
+}
+
+void WebGLBuffer::BufferData(const GLenum target, const uint64_t size,
+                             const void* const maybeData, const GLenum usage) {
+  // The driver knows only GLsizeiptr, which is int32_t on 32bit!
+  bool sizeValid = CheckedInt<GLsizeiptr>(size).isValid();
+
+  if (mContext->gl->WorkAroundDriverBugs()) {
+    // Bug 790879
+#if defined(XP_MACOSX) || defined(MOZ_WIDGET_GTK)
+    sizeValid &= CheckedInt<int32_t>(size).isValid();
+#endif
+
+    // Bug 1610383
+    if (mContext->gl->IsANGLE()) {
+      // While ANGLE seems to support up to `unsigned int`, UINT32_MAX-4 causes
+      // GL_OUT_OF_MEMORY in glFlush??
+      sizeValid &= CheckedInt<int32_t>(size).isValid();
+    }
+  }
+
+  if (!sizeValid) {
+    mContext->ErrorOutOfMemory("Size not valid for platform: %" PRIu64, size);
+    return;
+  }
+
+  // -
+
+  if (!ValidateBufferUsageEnum(mContext, usage)) return;
+
+  const void* uploadData = maybeData;
+  UniqueBuffer maybeCalloc;
+  if (!uploadData) {
+    maybeCalloc = calloc(1, AssertedCast<size_t>(size));
+    if (!maybeCalloc) {
+      mContext->ErrorOutOfMemory("Failed to alloc zeros.");
+      return;
+    }
+    uploadData = maybeCalloc.get();
+  }
+  MOZ_ASSERT(uploadData);
+
+  UniqueBuffer newIndexCache;
+  if (target == LOCAL_GL_ELEMENT_ARRAY_BUFFER &&
+      mContext->mNeedsIndexValidation) {
+    newIndexCache = malloc(AssertedCast<size_t>(size));
+    if (!newIndexCache) {
+      mContext->ErrorOutOfMemory("Failed to alloc index cache.");
+      return;
+    }
+    // memcpy out of SharedArrayBuffers can be racey, and should generally use
+    // memcpySafeWhenRacy. But it's safe here:
+    // * We only memcpy in one place.
+    // * We only read out of the single copy, and only after copying.
+    // * If we get data value corruption from racing read-during-write, that's
+    // fine.
+    memcpy(newIndexCache.get(), uploadData, size);
+    uploadData = newIndexCache.get();
+  }
+
+  const auto& gl = mContext->gl;
+  const ScopedLazyBind lazyBind(gl, target, this);
+
+  const bool sizeChanges = (size != ByteLength());
+  if (sizeChanges) {
+    gl::GLContext::LocalErrorScope errorScope(*gl);
+    gl->fBufferData(target, size, uploadData, usage);
+    const auto error = errorScope.GetError();
+
+    if (error) {
+      MOZ_ASSERT(error == LOCAL_GL_OUT_OF_MEMORY);
+      mContext->ErrorOutOfMemory("Error from driver: 0x%04x", error);
+
+      // Truncate
+      mByteLength = 0;
+      mFetchInvalidator.InvalidateCaches();
+      mIndexCache = nullptr;
+      return;
+    }
+  } else {
+    gl->fBufferData(target, size, uploadData, usage);
+  }
+
+  mContext->OnDataAllocCall();
+
+  mUsage = usage;
+  mByteLength = size;
+  mFetchInvalidator.InvalidateCaches();
+  mIndexCache = std::move(newIndexCache);
+
+  if (mIndexCache) {
+    if (!mIndexRanges.empty()) {
+      mContext->GeneratePerfWarning("[%p] Invalidating %u ranges.", this,
+                                    uint32_t(mIndexRanges.size()));
+      mIndexRanges.clear();
+    }
+  }
+
+  ResetLastUpdateFenceId();
+}
+
+void WebGLBuffer::BufferSubData(GLenum target, uint64_t dstByteOffset,
+                                uint64_t dataLen, const void* data) const {
+  if (!ValidateRange(dstByteOffset, dataLen)) return;
+
+  if (!CheckedInt<GLintptr>(dstByteOffset).isValid() ||
+      !CheckedInt<GLsizeiptr>(dataLen).isValid())
+    return mContext->ErrorOutOfMemory("offset or size too large for platform.");
+
+  ////
+
+  if (!dataLen) return;  // With validation successful, nothing else to do.
+
+  const void* uploadData = data;
+  if (mIndexCache) {
+    const auto cachedDataBegin = (uint8_t*)mIndexCache.get() + dstByteOffset;
+    memcpy(cachedDataBegin, data, dataLen);
+    uploadData = cachedDataBegin;
+
+    InvalidateCacheRange(dstByteOffset, dataLen);
+  }
+
+  ////
+
+  const auto& gl = mContext->gl;
+  const ScopedLazyBind lazyBind(gl, target, this);
+
+  gl->fBufferSubData(target, dstByteOffset, dataLen, uploadData);
+
+  ResetLastUpdateFenceId();
+}
+
+bool WebGLBuffer::ValidateRange(size_t byteOffset, size_t byteLen) const {
+  auto availLength = mByteLength;
+  if (byteOffset > availLength) {
+    mContext->ErrorInvalidValue("Offset passes the end of the buffer.");
+    return false;
+  }
+  availLength -= byteOffset;
+
+  if (byteLen > availLength) {
+    mContext->ErrorInvalidValue("Offset+size passes the end of the buffer.");
+    return false;
+  }
+
+  return true;
+}
+
+////////////////////////////////////////
+
+static uint8_t IndexByteSizeByType(GLenum type) {
+  switch (type) {
+    case LOCAL_GL_UNSIGNED_BYTE:
+      return 1;
+    case LOCAL_GL_UNSIGNED_SHORT:
+      return 2;
+    case LOCAL_GL_UNSIGNED_INT:
+      return 4;
+    default:
+      MOZ_CRASH();
+  }
+}
+
+void WebGLBuffer::InvalidateCacheRange(uint64_t byteOffset,
+                                       uint64_t byteLength) const {
+  MOZ_ASSERT(mIndexCache);
+
+  std::vector<IndexRange> invalids;
+  const uint64_t updateBegin = byteOffset;
+  const uint64_t updateEnd = updateBegin + byteLength;
+  for (const auto& cur : mIndexRanges) {
+    const auto& range = cur.first;
+    const auto& indexByteSize = IndexByteSizeByType(range.type);
+    const auto rangeBegin = range.byteOffset * indexByteSize;
+    const auto rangeEnd =
+        rangeBegin + uint64_t(range.indexCount) * indexByteSize;
+    if (rangeBegin >= updateEnd || rangeEnd <= updateBegin) continue;
+    invalids.push_back(range);
+  }
+
+  if (!invalids.empty()) {
+    mContext->GeneratePerfWarning("[%p] Invalidating %u/%u ranges.", this,
+                                  uint32_t(invalids.size()),
+                                  uint32_t(mIndexRanges.size()));
+
+    for (const auto& cur : invalids) {
+      mIndexRanges.erase(cur);
+    }
+  }
+}
+
+size_t WebGLBuffer::SizeOfIncludingThis(
+    mozilla::MallocSizeOf mallocSizeOf) const {
+  size_t size = mallocSizeOf(this);
+  if (mIndexCache) {
+    size += mByteLength;
+  }
+  return size;
+}
+
+template <typename T>
+static Maybe<uint32_t> MaxForRange(const void* const start,
+                                   const uint32_t count,
+                                   const Maybe<uint32_t>& untypedIgnoredVal) {
+  const Maybe<T> ignoredVal =
+      (untypedIgnoredVal ? Some(T(untypedIgnoredVal.value())) : Nothing());
+  Maybe<uint32_t> maxVal;
+
+  auto itr = (const T*)start;
+  const auto end = itr + count;
+
+  for (; itr != end; ++itr) {
+    const auto& val = *itr;
+    if (ignoredVal && val == ignoredVal.value()) continue;
+
+    if (maxVal && val <= maxVal.value()) continue;
+
+    maxVal = Some(val);
+  }
+
+  return maxVal;
+}
+
+static const uint32_t kMaxIndexRanges = 256;
+
+Maybe<uint32_t> WebGLBuffer::GetIndexedFetchMaxVert(
+    const GLenum type, const uint64_t byteOffset,
+    const uint32_t indexCount) const {
+  if (!mIndexCache) return Nothing();
+
+  const IndexRange range = {type, byteOffset, indexCount};
+  auto res = mIndexRanges.insert({range, Nothing()});
+  if (mIndexRanges.size() > kMaxIndexRanges) {
+    mContext->GeneratePerfWarning(
+        "[%p] Clearing mIndexRanges after exceeding %u.", this,
+        kMaxIndexRanges);
+    mIndexRanges.clear();
+    res = mIndexRanges.insert({range, Nothing()});
+  }
+
+  const auto& itr = res.first;
+  const auto& didInsert = res.second;
+
+  auto& maxFetchIndex = itr->second;
+  if (didInsert) {
+    const auto& data = mIndexCache.get();
+
+    const auto start = (const uint8_t*)data + byteOffset;
+
+    Maybe<uint32_t> ignoredVal;
+    if (mContext->IsWebGL2()) {
+      ignoredVal = Some(UINT32_MAX);
+    }
+
+    switch (type) {
+      case LOCAL_GL_UNSIGNED_BYTE:
+        maxFetchIndex = MaxForRange<uint8_t>(start, indexCount, ignoredVal);
+        break;
+      case LOCAL_GL_UNSIGNED_SHORT:
+        maxFetchIndex = MaxForRange<uint16_t>(start, indexCount, ignoredVal);
+        break;
+      case LOCAL_GL_UNSIGNED_INT:
+        maxFetchIndex = MaxForRange<uint32_t>(start, indexCount, ignoredVal);
+        break;
+      default:
+        MOZ_CRASH();
+    }
+    const auto displayMaxVertIndex =
+        maxFetchIndex ? int64_t(maxFetchIndex.value()) : -1;
+    mContext->GeneratePerfWarning("[%p] New range #%u: (0x%04x, %" PRIu64
+                                  ", %u):"
+                                  " %" PRIi64,
+                                  this, uint32_t(mIndexRanges.size()),
+                                  range.type, range.byteOffset,
+                                  range.indexCount, displayMaxVertIndex);
+  }
+
+  return maxFetchIndex;
+}
+
+////
+
+bool WebGLBuffer::ValidateCanBindToTarget(GLenum target) {
+  /* https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.1
+   *
+   * In the WebGL 2 API, buffers have their WebGL buffer type
+   * initially set to undefined. Calling bindBuffer, bindBufferRange
+   * or bindBufferBase with the target argument set to any buffer
+   * binding point except COPY_READ_BUFFER or COPY_WRITE_BUFFER will
+   * then set the WebGL buffer type of the buffer being bound
+   * according to the table above.
+   *
+   * Any call to one of these functions which attempts to bind a
+   * WebGLBuffer that has the element array WebGL buffer type to a
+   * binding point that falls under other data, or bind a
+   * WebGLBuffer which has the other data WebGL buffer type to
+   * ELEMENT_ARRAY_BUFFER will generate an INVALID_OPERATION error,
+   * and the state of the binding point will remain untouched.
+   */
+
+  if (mContent == WebGLBuffer::Kind::Undefined) return true;
+
+  switch (target) {
+    case LOCAL_GL_COPY_READ_BUFFER:
+    case LOCAL_GL_COPY_WRITE_BUFFER:
+      return true;
+
+    case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
+      if (mContent == WebGLBuffer::Kind::ElementArray) return true;
+      break;
+
+    case LOCAL_GL_ARRAY_BUFFER:
+    case LOCAL_GL_PIXEL_PACK_BUFFER:
+    case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+    case LOCAL_GL_UNIFORM_BUFFER:
+      if (mContent == WebGLBuffer::Kind::OtherData) return true;
+      break;
+
+    default:
+      MOZ_CRASH();
+  }
+
+  const auto dataType =
+      (mContent == WebGLBuffer::Kind::OtherData) ? "other" : "element";
+  mContext->ErrorInvalidOperation("Buffer already contains %s data.", dataType);
+  return false;
+}
+
+void WebGLBuffer::ResetLastUpdateFenceId() const {
+  mLastUpdateFenceId = mContext->mNextFenceId;
+}
+
+}  // namespace mozilla