1 // Copyright 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CC_LAYERS_TEXTURE_LAYER_CLIENT_H_ 6 #define CC_LAYERS_TEXTURE_LAYER_CLIENT_H_ 7 8 namespace WebKit { class WebGraphicsContext3D; } 9 10 namespace cc { 11 class ResourceUpdateQueue; 12 class TextureMailbox; 13 14 class TextureLayerClient { 15 public: 16 // Called to prepare this layer's texture for compositing. 17 // Returns the texture ID to be used for compositing. 18 virtual unsigned PrepareTexture() = 0; 19 20 // Returns the context that is providing the texture. Used for rate limiting 21 // and detecting lost context. 22 virtual WebKit::WebGraphicsContext3D* Context3d() = 0; 23 24 // Returns true and provides a mailbox if a new frame is available. 25 // Returns false if no new data is available 26 // and the old mailbox is to be reused. 27 virtual bool PrepareTextureMailbox(TextureMailbox* mailbox, 28 bool use_shared_memory) = 0; 29 30 protected: 31 virtual ~TextureLayerClient() {} 32 }; 33 34 } // namespace cc 35 36 #endif // CC_LAYERS_TEXTURE_LAYER_CLIENT_H_ 37