1 /* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. 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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef ShareableSurface_h 27 #define ShareableSurface_h 28 29 #include <WebCore/IntSize.h> 30 #include <wtf/Noncopyable.h> 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/RefCounted.h> 33 #include <wtf/RetainPtr.h> 34 35 typedef struct _CGLContextObject* CGLContextObj; 36 typedef struct __IOSurface* IOSurfaceRef; 37 38 namespace CoreIPC { 39 class ArgumentDecoder; 40 class ArgumentEncoder; 41 } 42 43 namespace WebKit { 44 45 class ShareableSurface : public RefCounted<ShareableSurface> { 46 public: 47 class Handle { 48 WTF_MAKE_NONCOPYABLE(Handle); 49 50 public: 51 Handle(); 52 ~Handle(); 53 54 void encode(CoreIPC::ArgumentEncoder*) const; 55 static bool decode(CoreIPC::ArgumentDecoder*, Handle&); 56 57 private: 58 friend class ShareableSurface; 59 60 mutable mach_port_t m_port; 61 }; 62 63 // Create a shareable surface with the given size. Returns 0 on failure. 64 static PassRefPtr<ShareableSurface> create(CGLContextObj, const WebCore::IntSize&); 65 66 // Create a shareable surface from a handle. Returns 0 on failure. 67 static PassRefPtr<ShareableSurface> create(CGLContextObj, const Handle&); 68 69 ~ShareableSurface(); 70 71 bool createHandle(Handle&); 72 73 unsigned textureID(); 74 75 void attach(); 76 void detach(); 77 78 private: 79 ShareableSurface(CGLContextObj, const WebCore::IntSize&, IOSurfaceRef); 80 81 // The OpenGL context. 82 CGLContextObj m_cglContextObj; 83 84 // The size of the surface. 85 WebCore::IntSize m_size; 86 87 // The ID of the texture. 88 unsigned m_textureID; 89 90 // The frame buffer object ID of the texture; used when the surface is used as a render destination. 91 unsigned m_frameBufferObjectID; 92 93 RetainPtr<IOSurfaceRef> m_ioSurface; 94 }; 95 96 } // namespace WebKit 97 98 #endif // ShareableSurface_h 99