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1 /* | |
2 * Copyright (c) 2008, 2009, 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 #include "config.h" | |
32 #include "ThemeHelperChromiumWin.h" | |
33 | |
34 #include "FloatRect.h" | |
35 #include "GraphicsContext.h" | |
36 | |
37 namespace WebCore { | |
38 | |
39 ThemeHelperWin::ThemeHelperWin(GraphicsContext* context, const IntRect& rect) | |
40 : m_orgContext(context) | |
41 , m_orgMatrix(context->getCTM()) | |
42 , m_orgRect(rect) | |
43 { | |
44 if (m_orgMatrix.b() != 0 || m_orgMatrix.c() != 0) { // Check for skew. | |
45 // Complicated effects, make a copy and draw the bitmap there. | |
46 m_type = COPY; | |
47 m_rect.setSize(rect.size()); | |
48 | |
49 m_newBuffer.set(ImageBuffer::create(rect.size(), false).release()); | |
50 | |
51 // Theme drawing messes with the transparency. | |
52 // FIXME: Ideally, we would leave this transparent, but I was | |
53 // having problems with button drawing, so we fill with white. Buttons | |
54 // looked good with transparent here and no fixing up of the alpha | |
55 // later, but text areas didn't. This makes text areas look good but | |
56 // gives buttons a white halo. Is there a way to fix this? I think | |
57 // buttons actually have antialised edges which is just not possible | |
58 // to handle on a transparent background given that it messes with the | |
59 // alpha channel. | |
60 FloatRect newContextRect(0, 0, rect.width(), rect.height()); | |
61 GraphicsContext* newContext = m_newBuffer->context(); | |
62 newContext->setFillColor(Color::white); | |
63 newContext->fillRect(newContextRect); | |
64 | |
65 return; | |
66 } | |
67 | |
68 if (m_orgMatrix.a() != 1.0 || m_orgMatrix.d() != 1.0) { // Check for scale. | |
69 // Only a scaling is applied. | |
70 m_type = SCALE; | |
71 | |
72 // Save the transformed coordinates to draw. | |
73 m_rect = m_orgMatrix.mapRect(rect); | |
74 | |
75 m_orgContext->save(); | |
76 m_orgContext->concatCTM(m_orgContext->getCTM().inverse()); | |
77 return; | |
78 } | |
79 | |
80 // Nothing interesting. | |
81 m_rect = rect; | |
82 m_type = ORIGINAL; | |
83 } | |
84 | |
85 ThemeHelperWin::~ThemeHelperWin() | |
86 { | |
87 switch (m_type) { | |
88 case SCALE: | |
89 m_orgContext->restore(); | |
90 break; | |
91 case COPY: { | |
92 // Copy the duplicate bitmap with our control to the original canvas. | |
93 FloatRect destRect(m_orgRect); | |
94 m_newBuffer->context()->platformContext()->canvas()-> | |
95 getTopPlatformDevice().fixupAlphaBeforeCompositing(); | |
96 m_orgContext->drawImage(m_newBuffer->image(), destRect); | |
97 break; | |
98 } | |
99 case ORIGINAL: | |
100 break; | |
101 } | |
102 } | |
103 | |
104 } // namespace WebCore | |
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