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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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