| // 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 <limits.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_; |
| } |
| |
| base::SharedMemory* TransportDIB::shared_memory() { |
| return &shared_memory_; |
| } |