1 /* 2 * Copyright (C) 2009 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 COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 WebGLObject_h 27 #define WebGLObject_h 28 29 #include "GraphicsContext3D.h" 30 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/RefCounted.h> 33 34 namespace WebCore { 35 36 class WebGLRenderingContext; 37 38 class WebGLObject : public RefCounted<WebGLObject> { 39 public: 40 virtual ~WebGLObject(); 41 42 Platform3DObject object() const { return m_object; } 43 44 // deleteObject may not always delete the OpenGL resource. For programs and 45 // shaders, deletion is delayed until they are no longer attached. 46 // FIXME: revisit this when resource sharing between contexts are implemented. 47 void deleteObject(); 48 49 void detachContext() 50 { 51 m_attachmentCount = 0; // Make sure OpenGL resource is deleted. 52 deleteObject(); 53 m_context = 0; 54 } 55 56 WebGLRenderingContext* context() const { return m_context; } 57 58 virtual bool isBuffer() const { return false; } 59 virtual bool isFramebuffer() const { return false; } 60 virtual bool isProgram() const { return false; } 61 virtual bool isRenderbuffer() const { return false; } 62 virtual bool isShader() const { return false; } 63 virtual bool isTexture() const { return false; } 64 65 void onAttached() { ++m_attachmentCount; } 66 void onDetached() 67 { 68 if (m_attachmentCount) 69 --m_attachmentCount; 70 if (m_deleted) 71 deleteObject(); 72 } 73 74 // This indicates whether the client side issue a delete call already, not 75 // whether the OpenGL resource is deleted. 76 // object()==0 indicates the OpenGL resource is deleted. 77 bool isDeleted() { return m_deleted; } 78 79 protected: 80 WebGLObject(WebGLRenderingContext*); 81 82 // setObject should be only called once right after creating a WebGLObject. 83 void setObject(Platform3DObject); 84 85 // deleteObjectImpl should be only called once to delete the OpenGL resource. 86 virtual void deleteObjectImpl(Platform3DObject) = 0; 87 88 private: 89 Platform3DObject m_object; 90 WebGLRenderingContext* m_context; 91 unsigned m_attachmentCount; 92 bool m_deleted; 93 }; 94 95 } // namespace WebCore 96 97 #endif // WebGLObject_h 98
