1 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Corporation code.
16 : *
17 : * The Initial Developer of the Original Code is Mozilla Foundation.
18 : * Portions created by the Initial Developer are Copyright (C) 2011
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Matt Woodrow <mwoodrow@mozilla.com>
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef MOZILLA_GFX_HELPERSSKIA_H_
39 : #define MOZILLA_GFX_HELPERSSKIA_H_
40 :
41 : #include "2D.h"
42 : #include "skia/SkCanvas.h"
43 : #include "skia/SkDashPathEffect.h"
44 :
45 : namespace mozilla {
46 : namespace gfx {
47 :
48 : static inline SkBitmap::Config
49 0 : GfxFormatToSkiaConfig(SurfaceFormat format)
50 : {
51 0 : switch (format)
52 : {
53 : case FORMAT_B8G8R8A8:
54 0 : return SkBitmap::kARGB_8888_Config;
55 : case FORMAT_B8G8R8X8:
56 : // We probably need to do something here.
57 0 : return SkBitmap::kARGB_8888_Config;
58 : case FORMAT_R5G6B5:
59 0 : return SkBitmap::kRGB_565_Config;
60 : case FORMAT_A8:
61 0 : return SkBitmap::kA8_Config;
62 :
63 : }
64 :
65 : return SkBitmap::kARGB_8888_Config;
66 : }
67 :
68 : static inline void
69 0 : GfxMatrixToSkiaMatrix(const Matrix& mat, SkMatrix& retval)
70 : {
71 : retval.setAll(SkFloatToScalar(mat._11), SkFloatToScalar(mat._21), SkFloatToScalar(mat._31),
72 : SkFloatToScalar(mat._12), SkFloatToScalar(mat._22), SkFloatToScalar(mat._32),
73 0 : 0, 0, SK_Scalar1);
74 0 : }
75 :
76 : static inline SkPaint::Cap
77 0 : CapStyleToSkiaCap(CapStyle aCap)
78 : {
79 0 : switch (aCap)
80 : {
81 : case CAP_BUTT:
82 0 : return SkPaint::kButt_Cap;
83 : case CAP_ROUND:
84 0 : return SkPaint::kRound_Cap;
85 : case CAP_SQUARE:
86 0 : return SkPaint::kSquare_Cap;
87 : }
88 0 : return SkPaint::kDefault_Cap;
89 : }
90 :
91 : static inline SkPaint::Join
92 0 : JoinStyleToSkiaJoin(JoinStyle aJoin)
93 : {
94 0 : switch (aJoin)
95 : {
96 : case JOIN_BEVEL:
97 0 : return SkPaint::kBevel_Join;
98 : case JOIN_ROUND:
99 0 : return SkPaint::kRound_Join;
100 : case JOIN_MITER:
101 : case JOIN_MITER_OR_BEVEL:
102 0 : return SkPaint::kMiter_Join;
103 : }
104 : return SkPaint::kDefault_Join;
105 : }
106 :
107 : static inline bool
108 0 : StrokeOptionsToPaint(SkPaint& aPaint, const StrokeOptions &aOptions)
109 : {
110 : // Skia rendewrs 0 width strokes with a width of 1 (and in black),
111 : // so we should just skip the draw call entirely.
112 0 : if (!aOptions.mLineWidth) {
113 0 : return false;
114 : }
115 0 : aPaint.setStrokeWidth(SkFloatToScalar(aOptions.mLineWidth));
116 0 : aPaint.setStrokeMiter(SkFloatToScalar(aOptions.mMiterLimit));
117 0 : aPaint.setStrokeCap(CapStyleToSkiaCap(aOptions.mLineCap));
118 0 : aPaint.setStrokeJoin(JoinStyleToSkiaJoin(aOptions.mLineJoin));
119 0 : if (aOptions.mDashLength > 1) {
120 0 : std::vector<SkScalar> pattern;
121 0 : pattern.resize(aOptions.mDashLength);
122 0 : for (uint32_t i = 0; i < aOptions.mDashLength; i++) {
123 0 : pattern[i] = SkFloatToScalar(aOptions.mDashPattern[i]);
124 : }
125 :
126 : SkDashPathEffect* dash = new SkDashPathEffect(&pattern.front(),
127 : aOptions.mDashLength,
128 0 : SkFloatToScalar(aOptions.mDashOffset));
129 0 : SkSafeUnref(aPaint.setPathEffect(dash));
130 : }
131 0 : aPaint.setStyle(SkPaint::kStroke_Style);
132 0 : return true;
133 : }
134 :
135 : }
136 : }
137 :
138 : #endif /* MOZILLA_GFX_HELPERSSKIA_H_ */
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