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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  *           (C) 2009 Brent Fulgham <bfulgham (at) webkit.org>
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15  *     its contributors may be used to endorse or promote products derived
     16  *     from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef PixelDumpSupportCairo_h
     31 #define PixelDumpSupportCairo_h
     32 
     33 #include <wtf/PassRefPtr.h>
     34 #include <wtf/RefCounted.h>
     35 
     36 #if PLATFORM(WIN)
     37 #include <windows.h>
     38 #include <cairo-win32.h>
     39 #elif PLATFORM(GTK)
     40 #include <cairo.h>
     41 #endif
     42 
     43 #if PLATFORM(WIN)
     44 typedef HBITMAP PlatformBitmapBuffer;
     45 #else
     46 typedef void* PlatformBitmapBuffer;
     47 #endif
     48 
     49 class BitmapContext : public RefCounted<BitmapContext> {
     50 public:
     51     static PassRefPtr<BitmapContext> createByAdoptingBitmapAndContext(PlatformBitmapBuffer buffer, cairo_t* context)
     52     {
     53         return adoptRef(new BitmapContext(buffer, context));
     54     }
     55 
     56     ~BitmapContext()
     57     {
     58         if (m_buffer)
     59 #if PLATFORM(WIN)
     60             DeleteObject(m_buffer);
     61 #else
     62             free(m_buffer);
     63 #endif
     64         cairo_destroy(m_context);
     65     }
     66 
     67     cairo_t* cairoContext() const { return m_context; }
     68 
     69 private:
     70 
     71     BitmapContext(PlatformBitmapBuffer buffer, cairo_t* context)
     72         : m_buffer(buffer)
     73         , m_context(context)
     74     {
     75     }
     76 
     77     PlatformBitmapBuffer m_buffer;
     78     cairo_t* m_context;
     79 };
     80 
     81 #endif // PixelDumpSupportCairo_h
     82