1 /*
2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
4 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
5 * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "config.h"
30 #include "CanvasStyle.h"
31
32 #include "CSSParser.h"
33 #include "CanvasGradient.h"
34 #include "CanvasPattern.h"
35 #include "GraphicsContext.h"
36 #include <wtf/PassRefPtr.h>
37
38 #if PLATFORM(CG)
39 #include <CoreGraphics/CGContext.h>
40 #endif
41
42 #if PLATFORM(QT)
43 #include <QPainter>
44 #include <QBrush>
45 #include <QPen>
46 #include <QColor>
47 #elif PLATFORM(CAIRO)
48 #include "NotImplemented.h"
49 #endif
50
51 namespace WebCore {
52
CanvasStyle(const String & color)53 CanvasStyle::CanvasStyle(const String& color)
54 : m_type(ColorString)
55 , m_color(color)
56 {
57 }
58
CanvasStyle(float grayLevel)59 CanvasStyle::CanvasStyle(float grayLevel)
60 : m_type(GrayLevel)
61 , m_alpha(1)
62 , m_grayLevel(grayLevel)
63 {
64 }
65
CanvasStyle(const String & color,float alpha)66 CanvasStyle::CanvasStyle(const String& color, float alpha)
67 : m_type(ColorStringWithAlpha)
68 , m_color(color)
69 , m_alpha(alpha)
70 {
71 }
72
CanvasStyle(float grayLevel,float alpha)73 CanvasStyle::CanvasStyle(float grayLevel, float alpha)
74 : m_type(GrayLevel)
75 , m_alpha(alpha)
76 , m_grayLevel(grayLevel)
77 {
78 }
79
CanvasStyle(float r,float g,float b,float a)80 CanvasStyle::CanvasStyle(float r, float g, float b, float a)
81 : m_type(RGBA), m_alpha(a), m_red(r), m_green(g), m_blue(b)
82 {
83 }
84
CanvasStyle(float c,float m,float y,float k,float a)85 CanvasStyle::CanvasStyle(float c, float m, float y, float k, float a)
86 : m_type(CMYKA), m_alpha(a), m_cyan(c), m_magenta(m), m_yellow(y), m_black(k)
87 {
88 }
89
CanvasStyle(PassRefPtr<CanvasGradient> gradient)90 CanvasStyle::CanvasStyle(PassRefPtr<CanvasGradient> gradient)
91 : m_type(gradient ? Gradient : ColorString)
92 , m_gradient(gradient)
93 {
94 }
95
CanvasStyle(PassRefPtr<CanvasPattern> pattern)96 CanvasStyle::CanvasStyle(PassRefPtr<CanvasPattern> pattern)
97 : m_type(pattern ? ImagePattern : ColorString)
98 , m_pattern(pattern)
99 {
100 }
101
applyStrokeColor(GraphicsContext * context)102 void CanvasStyle::applyStrokeColor(GraphicsContext* context)
103 {
104 if (!context)
105 return;
106 switch (m_type) {
107 case ColorString: {
108 Color c = Color(m_color);
109 if (c.isValid()) {
110 context->setStrokeColor(c.rgb());
111 break;
112 }
113 RGBA32 color = 0; // default is transparent black
114 if (CSSParser::parseColor(color, m_color))
115 context->setStrokeColor(color);
116 break;
117 }
118 case ColorStringWithAlpha: {
119 Color c = Color(m_color);
120 if (c.isValid()) {
121 context->setStrokeColor(colorWithOverrideAlpha(c.rgb(), m_alpha));
122 break;
123 }
124 RGBA32 color = 0; // default is transparent black
125 if (CSSParser::parseColor(color, m_color))
126 context->setStrokeColor(colorWithOverrideAlpha(color, m_alpha));
127 break;
128 }
129 case GrayLevel:
130 // We're only supporting 255 levels of gray here. Since this isn't
131 // even part of HTML5, I don't expect anyone will care. If they do
132 // we'll make a fancier Color abstraction.
133 context->setStrokeColor(Color(m_grayLevel, m_grayLevel, m_grayLevel, m_alpha));
134 break;
135 case RGBA:
136 context->setStrokeColor(Color(m_red, m_green, m_blue, m_alpha));
137 break;
138 case CMYKA: {
139 // FIXME: Do this through platform-independent GraphicsContext API.
140 // We'll need a fancier Color abstraction to support CYMKA correctly
141 #if PLATFORM(CG)
142 CGContextSetCMYKStrokeColor(context->platformContext(), m_cyan, m_magenta, m_yellow, m_black, m_alpha);
143 #elif PLATFORM(QT)
144 QPen currentPen = context->platformContext()->pen();
145 QColor clr;
146 clr.setCmykF(m_cyan, m_magenta, m_yellow, m_black, m_alpha);
147 currentPen.setColor(clr);
148 context->platformContext()->setPen(currentPen);
149 #elif PLATFORM(CAIRO)
150 notImplemented();
151 #elif PLATFORM(SGL)
152 context->setCMYKAStrokeColor(m_cyan, m_magenta, m_yellow, m_black, m_alpha);
153 #endif
154 break;
155 }
156 case Gradient:
157 context->setStrokeGradient(canvasGradient()->gradient());
158 break;
159 case ImagePattern:
160 context->setStrokePattern(canvasPattern()->pattern());
161 break;
162 }
163 }
164
applyFillColor(GraphicsContext * context)165 void CanvasStyle::applyFillColor(GraphicsContext* context)
166 {
167 if (!context)
168 return;
169 switch (m_type) {
170 case ColorString: {
171 Color c = Color(m_color);
172 if (c.isValid()){
173 context->setFillColor(c.rgb());
174 break;
175 }
176 RGBA32 rgba = 0; // default is transparent black
177 if (CSSParser::parseColor(rgba, m_color))
178 context->setFillColor(rgba);
179 break;
180 }
181 case ColorStringWithAlpha: {
182 Color c = Color(m_color);
183 if (c.isValid()){
184 context->setFillColor(colorWithOverrideAlpha(c.rgb(), m_alpha));
185 break;
186 }
187 RGBA32 color = 0; // default is transparent black
188 if (CSSParser::parseColor(color, m_color))
189 context->setFillColor(colorWithOverrideAlpha(color, m_alpha));
190 break;
191 }
192 case GrayLevel:
193 // We're only supporting 255 levels of gray here. Since this isn't
194 // even part of HTML5, I don't expect anyone will care. If they do
195 // we'll make a fancier Color abstraction.
196 context->setFillColor(Color(m_grayLevel, m_grayLevel, m_grayLevel, m_alpha));
197 break;
198 case RGBA:
199 context->setFillColor(Color(m_red, m_green, m_blue, m_alpha));
200 break;
201 case CMYKA: {
202 // FIXME: Do this through platform-independent GraphicsContext API.
203 // We'll need a fancier Color abstraction to support CYMKA correctly
204 #if PLATFORM(CG)
205 CGContextSetCMYKFillColor(context->platformContext(), m_cyan, m_magenta, m_yellow, m_black, m_alpha);
206 #elif PLATFORM(QT)
207 QBrush currentBrush = context->platformContext()->brush();
208 QColor clr;
209 clr.setCmykF(m_cyan, m_magenta, m_yellow, m_black, m_alpha);
210 currentBrush.setColor(clr);
211 context->platformContext()->setBrush(currentBrush);
212 #elif PLATFORM(SGL)
213 context->setCMYKAFillColor(m_cyan, m_magenta, m_yellow, m_black, m_alpha);
214 #endif
215 break;
216 }
217 case Gradient:
218 context->setFillGradient(canvasGradient()->gradient());
219 break;
220 case ImagePattern:
221 context->setFillPattern(canvasPattern()->pattern());
222 break;
223 }
224 }
225
226 }
227