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      1 /*
      2  * Copyright 2010, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef QueuedOperation_h
     27 #define QueuedOperation_h
     28 
     29 namespace WebCore {
     30 
     31 class TiledPage;
     32 
     33 class QueuedOperation {
     34 public:
     35     enum OperationType { Undefined, PaintTile, PaintLayer, DeleteTexture };
     36     QueuedOperation(OperationType type, TiledPage* page)
     37         : m_type(type)
     38         , m_page(page) {}
     39     virtual ~QueuedOperation() {}
     40     virtual void run() = 0;
     41     virtual bool operator==(const QueuedOperation* operation) = 0;
     42     virtual int priority() { return -1; }
     43     OperationType type() const { return m_type; }
     44     TiledPage* page() const { return m_page; }
     45 private:
     46     OperationType m_type;
     47     TiledPage* m_page;
     48 };
     49 
     50 class OperationFilter {
     51 public:
     52     virtual ~OperationFilter() {}
     53     virtual bool check(QueuedOperation* operation) = 0;
     54 };
     55 
     56 class PageFilter : public OperationFilter {
     57 public:
     58     PageFilter(TiledPage* page) : m_page(page) {}
     59     virtual bool check(QueuedOperation* operation)
     60     {
     61         if (operation->page() == m_page)
     62             return true;
     63         return false;
     64     }
     65 private:
     66     TiledPage* m_page;
     67 };
     68 
     69 class PagePaintFilter : public OperationFilter {
     70 public:
     71     PagePaintFilter(TiledPage* page) : m_page(page) {}
     72     virtual bool check(QueuedOperation* operation)
     73     {
     74         if (operation->type() == QueuedOperation::PaintTile
     75                 && operation->page() == m_page)
     76             return true;
     77         return false;
     78     }
     79 private:
     80     TiledPage* m_page;
     81 };
     82 
     83 }
     84 
     85 #endif // QueuedOperation_h
     86