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
47namespace blink {
48
49class GraphicsContext;
50
51SkXfermode::Mode PLATFORM_EXPORT WebCoreCompositeToSkiaComposite(CompositeOperator, WebBlendMode = WebBlendModeNormal);
52
53// move this guy into SkColor.h
54SkColor SkPMColorToColor(SkPMColor);
55
56inline 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.
64inline SkScalar WebCoreFloatToSkScalar(float f)
65{
66    return SkFloatToScalar(std::isfinite(f) ? f : 0);
67}
68
69inline SkScalar WebCoreDoubleToSkScalar(double d)
70{
71    return SkDoubleToScalar(std::isfinite(d) ? d : 0);
72}
73
74inline 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
80inline bool WebCoreFloatNearlyEqual(float a, float b)
81{
82    return SkScalarNearlyEqual(WebCoreFloatToSkScalar(a), WebCoreFloatToSkScalar(b));
83}
84
85inline 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
91bool PLATFORM_EXPORT SkPathContainsPoint(const SkPath&, const FloatPoint&, SkPath::FillType);
92
93SkMatrix PLATFORM_EXPORT affineTransformToSkMatrix(const AffineTransform&);
94
95bool nearlyIntegral(float value);
96
97InterpolationQuality limitInterpolationQuality(const GraphicsContext*, InterpolationQuality resampling);
98
99InterpolationQuality computeInterpolationQuality(
100    const SkMatrix&,
101    float srcWidth,
102    float srcHeight,
103    float destWidth,
104    float destHeight,
105    bool isDataComplete = true);
106
107bool shouldDrawAntiAliased(const GraphicsContext*, const SkRect& destRect);
108
109} // namespace blink
110
111#endif  // SkiaUtils_h
112