| /* |
| * Copyright (C) 2010 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: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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 WebGLExtension_h |
| #define WebGLExtension_h |
| |
| #include "core/html/HTMLCanvasElement.h" |
| #include "modules/webgl/WebGLExtensionName.h" |
| #include "modules/webgl/WebGLRenderingContextBase.h" |
| #include "platform/bindings/ScriptWrappable.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| class WebGLExtensionScopedContext final { |
| STACK_ALLOCATED(); |
| WTF_MAKE_NONCOPYABLE(WebGLExtensionScopedContext); |
| |
| public: |
| explicit WebGLExtensionScopedContext(WebGLExtension*); |
| ~WebGLExtensionScopedContext(); |
| |
| bool IsLost() const { return !context_; } |
| WebGLRenderingContextBase* Context() const { return context_.Get(); } |
| |
| private: |
| Member<WebGLRenderingContextBase> context_; |
| }; |
| |
| class WebGLExtension : public GarbageCollected<WebGLExtension>, |
| public ScriptWrappable { |
| WTF_MAKE_NONCOPYABLE(WebGLExtension); |
| |
| public: |
| virtual WebGLExtensionName GetName() const = 0; |
| |
| // Lose this extension. Passing true = force loss. Some extensions |
| // like WEBGL_lose_context are not normally lost when the context |
| // is lost but must be lost when destroying their WebGLRenderingContextBase. |
| virtual void Lose(bool) { context_ = nullptr; } |
| |
| bool IsLost() { return !context_; } |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| protected: |
| explicit WebGLExtension(WebGLRenderingContextBase*); |
| |
| private: |
| friend WebGLExtensionScopedContext; |
| |
| WeakMember<WebGLRenderingContextBase> context_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebGLExtension_h |