1 /* 2 * Copyright (c) 2010, 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 are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following disclaimer 11 * in the documentation and/or other materials provided with the 12 * distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef WebGLContextAttributes_h 28 #define WebGLContextAttributes_h 29 30 #include "bindings/core/v8/ScriptWrappable.h" 31 #include "core/html/canvas/CanvasContextAttributes.h" 32 #include "public/platform/WebGraphicsContext3D.h" 33 #include "wtf/PassRefPtr.h" 34 35 namespace blink { 36 37 class Settings; 38 39 class WebGLContextAttributes FINAL : public CanvasContextAttributes, public ScriptWrappable { 40 DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(WebGLContextAttributes); 41 DEFINE_WRAPPERTYPEINFO(); 42 public: 43 // Create a new attributes object 44 static PassRefPtrWillBeRawPtr<WebGLContextAttributes> create(); 45 46 // Create a copy of this object. 47 PassRefPtrWillBeRawPtr<WebGLContextAttributes> clone() const; 48 49 // Whether or not the drawing buffer has an alpha channel; default=true 50 bool alpha() const; 51 void setAlpha(bool); 52 53 // Whether or not the drawing buffer has a depth buffer; default=true 54 bool depth() const; 55 void setDepth(bool); 56 57 // Whether or not the drawing buffer has a stencil buffer; default=false 58 bool stencil() const; 59 void setStencil(bool); 60 61 // Whether or not the drawing buffer is antialiased; default=true 62 bool antialias() const; 63 void setAntialias(bool); 64 65 // Whether or not to treat the values in the drawing buffer as 66 // though their alpha channel has already been multiplied into the 67 // color channels; default=true 68 bool premultipliedAlpha() const; 69 void setPremultipliedAlpha(bool); 70 71 // Whether or not to preserve the drawing buffer after presentation to the 72 // screen; default=false 73 bool preserveDrawingBuffer() const; 74 void setPreserveDrawingBuffer(bool); 75 76 // Whether or not to fail context creation if performance will be 77 // significantly degraded compared to a native GL context; default=false 78 bool failIfMajorPerformanceCaveat() const; 79 void setFailIfMajorPerformanceCaveat(bool); 80 81 // Set up the attributes that can be used to initialize a WebGraphicsContext3D. 82 // It's mostly based on WebGLContextAttributes, but would be adjusted based 83 // on settings. 84 blink::WebGraphicsContext3D::Attributes attributes(const blink::WebString&, Settings*, unsigned webGLVersion) const; 85 86 protected: 87 WebGLContextAttributes(); 88 WebGLContextAttributes(const WebGLContextAttributes&); 89 90 private: 91 bool m_alpha; 92 bool m_depth; 93 bool m_stencil; 94 bool m_antialias; 95 bool m_premultipliedAlpha; 96 bool m_preserveDrawingBuffer; 97 bool m_failIfMajorPerformanceCaveat; 98 }; 99 100 } // namespace blink 101 102 #endif // WebGLContextAttributes_h 103
