1 /* 2 * Copyright (c) 2006,2007,2008, 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 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 // All of the functions in this file should move to new homes and this file should be deleted. 32 33 #ifndef SkiaUtils_h 34 #define SkiaUtils_h 35 36 #include "SkMatrix.h" 37 #include "SkPaint.h" 38 #include "SkPath.h" 39 #include "SkXfermode.h" 40 #include "platform/PlatformExport.h" 41 #include "platform/geometry/FloatRect.h" 42 #include "platform/graphics/Color.h" 43 #include "platform/graphics/GraphicsTypes.h" 44 #include "platform/transforms/AffineTransform.h" 45 #include "wtf/MathExtras.h" 46 47 namespace blink { 48 49 class GraphicsContext; 50 51 SkXfermode::Mode PLATFORM_EXPORT WebCoreCompositeToSkiaComposite(CompositeOperator, WebBlendMode = WebBlendModeNormal); 52 53 // move this guy into SkColor.h 54 SkColor SkPMColorToColor(SkPMColor); 55 56 inline SkPaint::FilterLevel WebCoreInterpolationQualityToSkFilterLevel(InterpolationQuality quality) 57 { 58 // FIXME: this reflects existing client mappings, but should probably 59 // be expanded to map higher level interpolations more accurately. 60 return quality != InterpolationNone ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel; 61 } 62 63 // Skia has problems when passed infinite, etc floats, filter them to 0. 64 inline SkScalar WebCoreFloatToSkScalar(float f) 65 { 66 return SkFloatToScalar(std::isfinite(f) ? f : 0); 67 } 68 69 inline SkScalar WebCoreDoubleToSkScalar(double d) 70 { 71 return SkDoubleToScalar(std::isfinite(d) ? d : 0); 72 } 73 74 inline SkRect WebCoreFloatRectToSKRect(const FloatRect& rect) 75 { 76 return SkRect::MakeLTRB(SkFloatToScalar(rect.x()), SkFloatToScalar(rect.y()), 77 SkFloatToScalar(rect.maxX()), SkFloatToScalar(rect.maxY())); 78 } 79 80 inline bool WebCoreFloatNearlyEqual(float a, float b) 81 { 82 return SkScalarNearlyEqual(WebCoreFloatToSkScalar(a), WebCoreFloatToSkScalar(b)); 83 } 84 85 inline SkPath::FillType WebCoreWindRuleToSkFillType(WindRule rule) 86 { 87 return static_cast<SkPath::FillType>(rule); 88 } 89 90 // Determine if a given WebKit point is contained in a path 91 bool PLATFORM_EXPORT SkPathContainsPoint(const SkPath&, const FloatPoint&, SkPath::FillType); 92 93 SkMatrix PLATFORM_EXPORT affineTransformToSkMatrix(const AffineTransform&); 94 95 bool nearlyIntegral(float value); 96 97 InterpolationQuality limitInterpolationQuality(const GraphicsContext*, InterpolationQuality resampling); 98 99 InterpolationQuality computeInterpolationQuality( 100 const SkMatrix&, 101 float srcWidth, 102 float srcHeight, 103 float destWidth, 104 float destHeight, 105 bool isDataComplete = true); 106 107 bool shouldDrawAntiAliased(const GraphicsContext*, const SkRect& destRect); 108 109 } // namespace blink 110 111 #endif // SkiaUtils_h 112