import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/2d/SourceSurfaceRawData.cpp

@@ -0,0 +1,81 @@
+/* -*- 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 "SourceSurfaceRawData.h"
+
+#include "DataSurfaceHelpers.h"
+#include "Logging.h"
+#include "mozilla/Types.h" // for decltype
+
+namespace mozilla {
+namespace gfx {
+
+void
+SourceSurfaceRawData::InitWrappingData(uint8_t *aData,
+                                       const IntSize &aSize,
+                                       int32_t aStride,
+                                       SurfaceFormat aFormat,
+                                       Factory::SourceSurfaceDeallocator aDeallocator,
+                                       void* aClosure)
+{
+  mRawData = aData;
+  mSize = aSize;
+  mStride = aStride;
+  mFormat = aFormat;
+
+  if (aDeallocator) {
+    mOwnData = true;
+  }
+  mDeallocator = aDeallocator;
+  mClosure = aClosure;
+}
+
+void
+SourceSurfaceRawData::GuaranteePersistance()
+{
+  if (mOwnData) {
+    return;
+  }
+
+  uint8_t* oldData = mRawData;
+  mRawData = new uint8_t[mStride * mSize.height];
+
+  memcpy(mRawData, oldData, mStride * mSize.height);
+  mOwnData = true;
+}
+
+bool
+SourceSurfaceAlignedRawData::Init(const IntSize &aSize,
+                                  SurfaceFormat aFormat,
+                                  bool aClearMem,
+                                  uint8_t aClearValue,
+                                  int32_t aStride)
+{
+  mFormat = aFormat;
+  mStride = aStride ? aStride : GetAlignedStride<16>(aSize.width, BytesPerPixel(aFormat));
+
+  size_t bufLen = BufferSizeFromStrideAndHeight(mStride, aSize.height);
+  if (bufLen > 0) {
+    bool zeroMem = aClearMem && !aClearValue;
+    static_assert(sizeof(decltype(mArray[0])) == 1,
+                  "mArray.Realloc() takes an object count, so its objects must be 1-byte sized if we use bufLen");
+
+    // AlignedArray uses cmalloc to zero mem for a fast path.
+    mArray.Realloc(/* actually an object count */ bufLen, zeroMem);
+    mSize = aSize;
+
+    if (mArray && aClearMem && aClearValue) {
+      memset(mArray, aClearValue, mStride * aSize.height);
+    }
+  } else {
+    mArray.Dealloc();
+    mSize.SizeTo(0, 0);
+  }
+
+  return mArray != nullptr;
+}
+
+} // namespace gfx
+} // namespace mozilla