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| author | jschuh@chromium.org <jschuh@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-03-28 02:02:18 +0000 |
|---|---|---|
| committer | jschuh@chromium.org <jschuh@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-03-28 02:02:18 +0000 |
| commit | 67ea507fbee5b2d1647f3b86a60c36e8ba40c797 (patch) | |
| tree | 26384c8a65a9c333da260e433055bead8b0ef88d /ui/surface/transport_dib.cc | |
| parent | 66eda3ee6b93c063f79ae9fc89e472e353b89585 (diff) | |
| download | chromium_src-67ea507fbee5b2d1647f3b86a60c36e8ba40c797.zip chromium_src-67ea507fbee5b2d1647f3b86a60c36e8ba40c797.tar.gz chromium_src-67ea507fbee5b2d1647f3b86a60c36e8ba40c797.tar.bz2 | |
Make SharedMemory track the size that was actually mapped
In the process I also had to fix several dependencies, and
some major issues in transport DIBs.
BUG=60819
Review URL: https://chromiumcodereview.appspot.com/12537014
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@191098 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'ui/surface/transport_dib.cc')
| -rw-r--r-- | ui/surface/transport_dib.cc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/ui/surface/transport_dib.cc b/ui/surface/transport_dib.cc new file mode 100644 index 0000000..ba72f91 --- /dev/null +++ b/ui/surface/transport_dib.cc @@ -0,0 +1,21 @@ +// Copyright (c) 2013 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "ui/surface/transport_dib.h" + +#include "skia/ext/platform_canvas.h" + +// static +bool TransportDIB::VerifyCanvasSize(int w, int h) { + static const size_t kMaxSize = static_cast<size_t>(INT_MAX); + const size_t one_stride = skia::PlatformCanvasStrideForWidth(1); + const size_t stride = skia::PlatformCanvasStrideForWidth(w); + if (w <= 0 || h <= 0 || static_cast<size_t>(w) > (kMaxSize / one_stride) || + static_cast<size_t>(h) > (kMaxSize / stride)) { + return false; + } + + return (stride * h) <= size_; +} + |