annotate Framework/Scene2D/Internals/CairoInfoPanelRenderer.cpp @ 1270:2d8ab34c8c91

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 31 Jan 2020 17:34:29 +0100
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "CairoInfoPanelRenderer.h"
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24 #include "../InfoPanelSceneLayer.h"
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25
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26 namespace OrthancStone
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27 {
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28 namespace Internals
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29 {
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30 void CairoInfoPanelRenderer::Update(const ISceneLayer& layer)
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31 {
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32 const InfoPanelSceneLayer& l = dynamic_cast<const InfoPanelSceneLayer&>(layer);
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34 texture_.Copy(l.GetTexture(), true);
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35 anchor_ = l.GetAnchor();
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36 isLinearInterpolation_ = l.IsLinearInterpolation();
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37 }
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39
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40 void CairoInfoPanelRenderer::Render(const AffineTransform2D& transform,
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41 unsigned int canvasWidth,
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42 unsigned int canvasHeight)
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43 {
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44 int dx, dy;
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45 InfoPanelSceneLayer::ComputeAnchorLocation(
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46 dx, dy, anchor_, texture_.GetWidth(), texture_.GetHeight(),
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47 canvasWidth, canvasHeight);
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48
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49 cairo_t* cr = target_.GetCairoContext();
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50
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51 cairo_save(cr);
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52
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53 cairo_matrix_t t;
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54 cairo_matrix_init_identity(&t);
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55 cairo_matrix_translate(&t, dx, dy);
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56 cairo_transform(cr, &t);
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58 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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59 cairo_set_source_surface(cr, texture_.GetObject(), 0, 0);
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61 if (isLinearInterpolation_)
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62 {
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63 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR);
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64 }
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65 else
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66 {
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67 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
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68 }
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69
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70 cairo_paint(cr);
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71
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72 cairo_restore(cr);
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73 }
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74 }
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75 }