Chrome side of webkit merge to 40124....

webkit/port/bindings/v8/CanvasPixelArray.cpp

-/*
- * Copyright (c) 2009, Google Inc. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include <CanvasPixelArray.h>
-
-#include <v8_proxy.h>
-#include <wtf/Assertions.h>
-
-namespace WebCore {
-
-    CanvasPixelArray::CanvasPixelArray(size_t length)
-    {
-        ASSERT((length & 3) == 0);  // Length must be a multiple of 4.
-        m_length = length;
-        m_data = static_cast<unsigned char*>(fastMalloc(m_length));
-    }
-
-    CanvasPixelArray::~CanvasPixelArray()
-    {
-        fastFree(m_data);
-        // Ensure that accesses after destruction will fail. In case there is a
-        // dangling reference.
-        m_length = 0;
-        m_data = reinterpret_cast<unsigned char*>(-1);
-    }
-
-    size_t CanvasPixelArray::length() const
-    {
-        return m_length;
-    }
-
-    unsigned char* CanvasPixelArray::data()
-    {
-        return m_data;
-    }
-
-    unsigned char CanvasPixelArray::get(size_t index)
-    {
-        ASSERT(index < m_length);
-        return m_data[index];
-    }
-
-    void CanvasPixelArray::set(size_t index, double value)
-    {
-        ASSERT(index < m_length);
-        if (!(value > 0)) {  // Test for NaN and less than zero in one go.
-            value = 0;
-        } else if (value > 255) {
-            value = 255;
-        }
-        m_data[index] = static_cast<unsigned char>(value + 0.5);
-    }
-
-}  // namespace WebCore