1 /* 2 * Copyright (C) 2011 Google 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef WebExternalTextureLayer_h 27 #define WebExternalTextureLayer_h 28 29 #include "WebCommon.h" 30 #include "WebFloatRect.h" 31 #include "WebLayer.h" 32 33 namespace blink { 34 35 class WebExternalTextureLayerClient; 36 37 // This class represents a layer that renders a texture that is generated 38 // externally (not managed by the WebLayerTreeView). 39 // The texture will be used by the WebLayerTreeView during compositing passes. 40 // When in single-thread mode, this means during WebLayerTreeView::composite(). 41 // When using the threaded compositor, this can mean at an arbitrary time until 42 // the WebLayerTreeView is destroyed. 43 class WebExternalTextureLayer { 44 public: 45 virtual ~WebExternalTextureLayer() { } 46 47 virtual WebLayer* layer() = 0; 48 49 // Clears texture from the layer. 50 virtual void clearTexture() = 0; 51 52 // Sets whether every pixel in this layer is opaque. Defaults to false. 53 virtual void setOpaque(bool) = 0; 54 55 // Sets whether this layer's texture has premultiplied alpha or not. Defaults to true. 56 virtual void setPremultipliedAlpha(bool) = 0; 57 58 // Sets whether the texture should be blended with the background color 59 // at draw time. Defaults to false. 60 virtual void setBlendBackgroundColor(bool) = 0; 61 62 // Sets whether this context should be rate limited by the compositor. Rate limiting works by blocking 63 // invalidate() and invalidateRect() calls if the compositor is too many frames behind. 64 virtual void setRateLimitContext(bool) = 0; 65 }; 66 67 } // namespace blink 68 69 #endif // WebExternalTextureLayer_h 70
