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 "SkPath.h"
38 #include "SkXfermode.h"
39 #include "platform/PlatformExport.h"
40 #include "platform/geometry/FloatRect.h"
41 #include "platform/graphics/Color.h"
42 #include "platform/graphics/GraphicsTypes.h"
43 #include "platform/transforms/AffineTransform.h"
44 #include "wtf/MathExtras.h"
45 #include "wtf/PassRefPtr.h"
46
47 class SkCanvas;
48 class SkRegion;
49
50 namespace WebCore {
51
52 class GraphicsContext;
53
54 PassRefPtr<SkXfermode> WebCoreCompositeToSkiaComposite(CompositeOperator, blink::WebBlendMode = blink::WebBlendModeNormal);
55
56 // move this guy into SkColor.h
57 SkColor SkPMColorToColor(SkPMColor);
58
59 // Skia has problems when passed infinite, etc floats, filter them to 0.
WebCoreFloatToSkScalar(float f)60 inline SkScalar WebCoreFloatToSkScalar(float f)
61 {
62 return SkFloatToScalar(std::isfinite(f) ? f : 0);
63 }
64
WebCoreDoubleToSkScalar(double d)65 inline SkScalar WebCoreDoubleToSkScalar(double d)
66 {
67 return SkDoubleToScalar(std::isfinite(d) ? d : 0);
68 }
69
WebCoreFloatRectToSKRect(const FloatRect & rect)70 inline SkRect WebCoreFloatRectToSKRect(const FloatRect& rect)
71 {
72 return SkRect::MakeLTRB(SkFloatToScalar(rect.x()), SkFloatToScalar(rect.y()),
73 SkFloatToScalar(rect.maxX()), SkFloatToScalar(rect.maxY()));
74 }
75
WebCoreFloatNearlyEqual(float a,float b)76 inline bool WebCoreFloatNearlyEqual(float a, float b)
77 {
78 return SkScalarNearlyEqual(WebCoreFloatToSkScalar(a), WebCoreFloatToSkScalar(b));
79 }
80
81 // Computes the smallest rectangle that, which when drawn to the given canvas,
82 // will cover the same area as the source rectangle. It will clip to the canvas'
83 // clip, doing the necessary coordinate transforms.
84 //
85 // srcRect and destRect can be the same.
86 void ClipRectToCanvas(const GraphicsContext*, const SkRect& srcRect, SkRect* destRect);
87
88 // Determine if a given WebKit point is contained in a path
89 bool PLATFORM_EXPORT SkPathContainsPoint(const SkPath&, const FloatPoint&, SkPath::FillType);
90
91 SkMatrix PLATFORM_EXPORT affineTransformToSkMatrix(const AffineTransform&);
92
93 } // namespace WebCore
94
95 #endif // SkiaUtils_h
96