Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 45 insertions, 0 deletions

diff --git a/gfx/2d/Scale.cpp b/gfx/2d/Scale.cpp
new file mode 100644
index 0000000000..af26cd3776
--- /dev/null
+++ b/gfx/2d/Scale.cpp
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "Scale.h"
+
+#ifdef USE_SKIA
+#  include "HelpersSkia.h"
+#  include "skia/src/core/SkBitmapScaler.h"
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight,
+           int32_t srcStride, uint8_t* dstData, int32_t dstWidth,
+           int32_t dstHeight, int32_t dstStride, SurfaceFormat format) {
+#ifdef USE_SKIA
+  SkPixmap srcPixmap(MakeSkiaImageInfo(IntSize(srcWidth, srcHeight), format),
+                     srcData, srcStride);
+
+  // Rescaler is compatible with N32 only. Convert to N32 if needed.
+  SkBitmap tmpBitmap;
+  if (srcPixmap.colorType() != kN32_SkColorType) {
+    if (!tmpBitmap.tryAllocPixels(
+            SkImageInfo::MakeN32Premul(srcWidth, srcHeight)) ||
+        !tmpBitmap.writePixels(srcPixmap) ||
+        !tmpBitmap.peekPixels(&srcPixmap)) {
+      return false;
+    }
+  }
+
+  SkPixmap dstPixmap(SkImageInfo::MakeN32Premul(dstWidth, dstHeight), dstData,
+                     dstStride);
+  return SkBitmapScaler::Resize(dstPixmap, srcPixmap,
+                                SkBitmapScaler::RESIZE_LANCZOS3);
+#else
+  return false;
+#endif
+}
+
+}  // namespace gfx
+}  // namespace mozilla