Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/image-decoders/bmp/BMPImageDecoder.h

-/*
- * Copyright (c) 2008, 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.
- */
-
-#ifndef BMPImageDecoder_h
-#define BMPImageDecoder_h
-
-#include "core/platform/image-decoders/bmp/BMPImageReader.h"
-#include "wtf/OwnPtr.h"
-
-namespace WebCore {
-
-    // This class decodes the BMP image format.
-    class BMPImageDecoder : public ImageDecoder {
-    public:
-        BMPImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes);
-
-        // ImageDecoder
-        virtual String filenameExtension() const { return "bmp"; }
-        virtual void setData(SharedBuffer*, bool allDataReceived);
-        virtual bool isSizeAvailable();
-        virtual ImageFrame* frameBufferAtIndex(size_t);
-        // CAUTION: setFailed() deletes |m_reader|.  Be careful to avoid
-        // accessing deleted memory, especially when calling this from inside
-        // BMPImageReader!
-        virtual bool setFailed();
-
-    private:
-        inline uint32_t readUint32(int offset) const
-        {
-            return BMPImageReader::readUint32(m_data.get(), m_decodedOffset + offset);
-        }
-
-        // Decodes the image.  If |onlySize| is true, stops decoding after
-        // calculating the image size.  If decoding fails but there is no more
-        // data coming, sets the "decode failure" flag.
-        void decode(bool onlySize);
-
-        // Decodes the image.  If |onlySize| is true, stops decoding after
-        // calculating the image size.  Returns whether decoding succeeded.
-        bool decodeHelper(bool onlySize);
-
-        // Processes the file header at the beginning of the data.  Sets
-        // |*imgDataOffset| based on the header contents.  Returns true if the
-        // file header could be decoded.
-        bool processFileHeader(size_t* imgDataOffset);
-
-        // An index into |m_data| representing how much we've already decoded.
-        // Note that this only tracks data _this_ class decodes; once the
-        // BMPImageReader takes over this will not be updated further.
-        size_t m_decodedOffset;
-
-        // The reader used to do most of the BMP decoding.
-        OwnPtr<BMPImageReader> m_reader;
-    };
-
-} // namespace WebCore
-
-#endif