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
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11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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15 : * The Original Code is Mozilla Corporation code.
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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.
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22 : *
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35 : * ***** END LICENSE BLOCK ***** */
36 :
37 : #ifndef MOZILLA_GFX_HELPERSCAIRO_H_
38 : #define MOZILLA_GFX_HELPERSCAIRO_H_
39 :
40 : #include "2D.h"
41 : #include "cairo.h"
42 :
43 : namespace mozilla {
44 : namespace gfx {
45 :
46 : static inline cairo_operator_t
47 0 : GfxOpToCairoOp(CompositionOp op)
48 : {
49 0 : switch (op)
50 : {
51 : case OP_OVER:
52 0 : return CAIRO_OPERATOR_OVER;
53 : case OP_ADD:
54 0 : return CAIRO_OPERATOR_ADD;
55 : case OP_ATOP:
56 0 : return CAIRO_OPERATOR_ATOP;
57 : case OP_OUT:
58 0 : return CAIRO_OPERATOR_OUT;
59 : case OP_IN:
60 0 : return CAIRO_OPERATOR_IN;
61 : case OP_SOURCE:
62 0 : return CAIRO_OPERATOR_SOURCE;
63 : case OP_DEST_IN:
64 0 : return CAIRO_OPERATOR_DEST_IN;
65 : case OP_DEST_OUT:
66 0 : return CAIRO_OPERATOR_DEST_OUT;
67 : case OP_DEST_OVER:
68 0 : return CAIRO_OPERATOR_DEST_OVER;
69 : case OP_DEST_ATOP:
70 0 : return CAIRO_OPERATOR_DEST_ATOP;
71 : case OP_XOR:
72 0 : return CAIRO_OPERATOR_XOR;
73 : case OP_COUNT:
74 0 : break;
75 : }
76 :
77 0 : return CAIRO_OPERATOR_OVER;
78 : }
79 :
80 : static inline cairo_filter_t
81 0 : GfxFilterToCairoFilter(Filter filter)
82 : {
83 0 : switch (filter)
84 : {
85 : case FILTER_LINEAR:
86 0 : return CAIRO_FILTER_BILINEAR;
87 : case FILTER_POINT:
88 0 : return CAIRO_FILTER_NEAREST;
89 : }
90 :
91 : return CAIRO_FILTER_BILINEAR;
92 : }
93 :
94 : static inline cairo_extend_t
95 0 : GfxExtendToCairoExtend(ExtendMode extend)
96 : {
97 0 : switch (extend)
98 : {
99 : case EXTEND_CLAMP:
100 0 : return CAIRO_EXTEND_PAD;
101 : case EXTEND_REPEAT:
102 0 : return CAIRO_EXTEND_REPEAT;
103 : case EXTEND_REFLECT:
104 0 : return CAIRO_EXTEND_REFLECT;
105 : }
106 :
107 0 : return CAIRO_EXTEND_PAD;
108 : }
109 :
110 : static inline cairo_format_t
111 0 : GfxFormatToCairoFormat(SurfaceFormat format)
112 : {
113 0 : switch (format)
114 : {
115 : case FORMAT_B8G8R8A8:
116 0 : return CAIRO_FORMAT_ARGB32;
117 : case FORMAT_B8G8R8X8:
118 0 : return CAIRO_FORMAT_RGB24;
119 : case FORMAT_A8:
120 0 : return CAIRO_FORMAT_A8;
121 : default:
122 0 : return CAIRO_FORMAT_ARGB32;
123 : }
124 : }
125 :
126 : static inline cairo_content_t
127 0 : GfxFormatToCairoContent(SurfaceFormat format)
128 : {
129 0 : switch (format)
130 : {
131 : case FORMAT_B8G8R8A8:
132 0 : return CAIRO_CONTENT_COLOR_ALPHA;
133 : case FORMAT_B8G8R8X8:
134 0 : return CAIRO_CONTENT_COLOR;
135 : case FORMAT_A8:
136 0 : return CAIRO_CONTENT_ALPHA;
137 : default:
138 0 : return CAIRO_CONTENT_COLOR_ALPHA;
139 : }
140 : }
141 :
142 : static inline cairo_line_join_t
143 0 : GfxLineJoinToCairoLineJoin(JoinStyle style)
144 : {
145 0 : switch (style)
146 : {
147 : case JOIN_BEVEL:
148 0 : return CAIRO_LINE_JOIN_BEVEL;
149 : case JOIN_ROUND:
150 0 : return CAIRO_LINE_JOIN_ROUND;
151 : case JOIN_MITER:
152 0 : return CAIRO_LINE_JOIN_MITER;
153 : case JOIN_MITER_OR_BEVEL:
154 0 : return CAIRO_LINE_JOIN_MITER;
155 : }
156 :
157 : return CAIRO_LINE_JOIN_MITER;
158 : }
159 :
160 : static inline cairo_line_cap_t
161 0 : GfxLineCapToCairoLineCap(CapStyle style)
162 : {
163 0 : switch (style)
164 : {
165 : case CAP_BUTT:
166 0 : return CAIRO_LINE_CAP_BUTT;
167 : case CAP_ROUND:
168 0 : return CAIRO_LINE_CAP_ROUND;
169 : case CAP_SQUARE:
170 0 : return CAIRO_LINE_CAP_SQUARE;
171 : }
172 :
173 0 : return CAIRO_LINE_CAP_BUTT;
174 : }
175 :
176 : static inline SurfaceFormat
177 0 : CairoContentToGfxFormat(cairo_content_t content)
178 : {
179 0 : switch (content)
180 : {
181 : case CAIRO_CONTENT_COLOR_ALPHA:
182 0 : return FORMAT_B8G8R8A8;
183 : case CAIRO_CONTENT_COLOR:
184 0 : return FORMAT_B8G8R8X8;
185 : case CAIRO_CONTENT_ALPHA:
186 0 : return FORMAT_A8;
187 : }
188 :
189 0 : return FORMAT_B8G8R8A8;
190 : }
191 :
192 : static inline void
193 0 : GfxMatrixToCairoMatrix(const Matrix& mat, cairo_matrix_t& retval)
194 : {
195 0 : cairo_matrix_init(&retval, mat._11, mat._12, mat._21, mat._22, mat._31, mat._32);
196 0 : }
197 :
198 : static inline void
199 0 : SetCairoStrokeOptions(cairo_t* aCtx, const StrokeOptions& aStrokeOptions)
200 : {
201 0 : cairo_set_line_width(aCtx, aStrokeOptions.mLineWidth);
202 :
203 0 : cairo_set_miter_limit(aCtx, aStrokeOptions.mMiterLimit);
204 :
205 0 : if (aStrokeOptions.mDashPattern) {
206 : // Convert array of floats to array of doubles
207 0 : std::vector<double> dashes(aStrokeOptions.mDashLength);
208 0 : for (size_t i = 0; i < aStrokeOptions.mDashLength; ++i) {
209 0 : dashes[i] = aStrokeOptions.mDashPattern[i];
210 : }
211 0 : cairo_set_dash(aCtx, &dashes[0], aStrokeOptions.mDashLength,
212 0 : aStrokeOptions.mDashOffset);
213 : }
214 :
215 0 : cairo_set_line_join(aCtx, GfxLineJoinToCairoLineJoin(aStrokeOptions.mLineJoin));
216 :
217 0 : cairo_set_line_cap(aCtx, GfxLineCapToCairoLineCap(aStrokeOptions.mLineCap));
218 0 : }
219 :
220 : static inline cairo_fill_rule_t
221 0 : GfxFillRuleToCairoFillRule(FillRule rule)
222 : {
223 0 : switch (rule)
224 : {
225 : case FILL_WINDING:
226 0 : return CAIRO_FILL_RULE_WINDING;
227 : case FILL_EVEN_ODD:
228 0 : return CAIRO_FILL_RULE_EVEN_ODD;
229 : }
230 :
231 : return CAIRO_FILL_RULE_WINDING;
232 : }
233 :
234 : }
235 : }
236 :
237 : #endif /* MOZILLA_GFX_HELPERSCAIRO_H_ */
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