Mercurial > hg > orthanc-stone
annotate Framework/Widgets/CairoWidget.cpp @ 560:aaeec7be8fb7
add support for alpha channel in CairoSurface
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 17 Apr 2019 17:57:50 +0200 |
| parents | b70e9be013e4 |
| children | 4f2416d519b4 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 439 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 8 * modify it under the terms of the GNU Affero General Public License |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 0 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 47 | 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "CairoWidget.h" | |
| 23 | |
|
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24 #include <Core/Images/ImageProcessing.h> |
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25 #include <Core/OrthancException.h> |
| 0 | 26 |
| 27 namespace OrthancStone | |
| 28 { | |
| 29 static bool IsAligned(const Orthanc::ImageAccessor& target) | |
| 30 { | |
| 31 // TODO | |
| 32 return true; | |
| 33 } | |
| 34 | |
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35 CairoWidget::CairoWidget(const std::string& name) : |
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36 WidgetBase(name) |
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37 { |
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38 } |
| 0 | 39 |
| 40 void CairoWidget::SetSize(unsigned int width, | |
| 41 unsigned int height) | |
| 42 { | |
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43 surface_.SetSize(width, height, false /* no alpha */); |
| 0 | 44 } |
| 45 | |
| 46 | |
| 47 bool CairoWidget::Render(Orthanc::ImageAccessor& target) | |
| 48 { | |
| 49 // Don't call the base class here, as | |
| 50 // "ClearBackgroundCairo()" is a faster alternative | |
| 51 | |
| 52 if (IsAligned(target)) | |
| 53 { | |
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parents:
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54 CairoSurface surface(target, false /* no alpha */); |
| 0 | 55 CairoContext context(surface); |
| 56 ClearBackgroundCairo(context); | |
| 57 return RenderCairo(context); | |
| 58 } | |
| 59 else | |
| 60 { | |
| 61 CairoContext context(surface_); | |
| 62 ClearBackgroundCairo(context); | |
| 63 | |
| 64 if (RenderCairo(context)) | |
| 65 { | |
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66 Orthanc::ImageAccessor surface; |
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67 surface_.GetReadOnlyAccessor(surface); |
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68 Orthanc::ImageProcessing::Copy(target, surface); |
| 0 | 69 return true; |
| 70 } | |
| 71 else | |
| 72 { | |
| 73 return false; | |
| 74 } | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void CairoWidget::RenderMouseOver(Orthanc::ImageAccessor& target, | |
| 80 int x, | |
| 81 int y) | |
| 82 { | |
| 83 if (IsAligned(target)) | |
| 84 { | |
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85 CairoSurface surface(target, false /* no alpha */); |
| 0 | 86 CairoContext context(surface); |
| 87 RenderMouseOverCairo(context, x, y); | |
| 88 } | |
| 89 else | |
| 90 { | |
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91 Orthanc::ImageAccessor accessor; |
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92 surface_.GetWriteableAccessor(accessor); |
| 0 | 93 Orthanc::ImageProcessing::Copy(accessor, target); |
| 94 | |
| 95 CairoContext context(surface_); | |
| 96 RenderMouseOverCairo(context, x, y); | |
| 97 | |
| 98 Orthanc::ImageProcessing::Copy(target, accessor); | |
| 99 } | |
| 100 } | |
| 101 } |