Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/CairoInfoPanelRenderer.cpp @ 1512:244ad1e4e76a
reorganization of folders
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 07 Jul 2020 16:21:02 +0200 |
| parents | Framework/Scene2D/Internals/CairoInfoPanelRenderer.cpp@be17fed8c7c5 |
| children | 85e117739eca |
| rev | line source |
|---|---|
| 597 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
| 597 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 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. | |
| 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 | |
| 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 | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "CairoInfoPanelRenderer.h" | |
| 23 | |
| 24 #include "../InfoPanelSceneLayer.h" | |
| 25 | |
| 26 namespace OrthancStone | |
| 27 { | |
| 28 namespace Internals | |
| 29 { | |
| 30 void CairoInfoPanelRenderer::Update(const ISceneLayer& layer) | |
| 31 { | |
| 32 const InfoPanelSceneLayer& l = dynamic_cast<const InfoPanelSceneLayer&>(layer); | |
| 33 | |
| 34 texture_.Copy(l.GetTexture(), true); | |
| 35 anchor_ = l.GetAnchor(); | |
| 36 isLinearInterpolation_ = l.IsLinearInterpolation(); | |
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37 applySceneRotation_ = l.ShouldApplySceneRotation(); |
| 597 | 38 } |
| 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) |
| 597 | 43 { |
| 44 int dx, dy; | |
| 45 InfoPanelSceneLayer::ComputeAnchorLocation( | |
| 46 dx, dy, anchor_, texture_.GetWidth(), texture_.GetHeight(), | |
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47 canvasWidth, canvasHeight); |
| 597 | 48 |
| 49 cairo_t* cr = target_.GetCairoContext(); | |
| 50 cairo_save(cr); | |
| 51 | |
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52 if (applySceneRotation_) |
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53 { |
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54 // the transformation is as follows: |
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55 // - originally, the image is aligned so that its top left corner |
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56 // is at 0,0 |
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57 // - first, we translate the image by -w/2,-h/2 |
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58 // - then we rotate it, so that the next rotation will make the |
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59 // image rotate around its center. |
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60 // - then, we translate the image by +w/2,+h/2 to put it |
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61 // back in place |
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62 // - the fourth and last transform is the one that brings the |
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63 // image to its desired anchored location. |
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64 |
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65 int32_t halfWidth = |
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66 static_cast<int32_t>(0.5 * texture_.GetWidth()); |
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67 |
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68 int32_t halfHeight = |
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69 static_cast<int32_t>(0.5 * texture_.GetHeight()); |
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70 |
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71 AffineTransform2D translation1 = |
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72 AffineTransform2D::CreateOffset(-halfWidth, -halfHeight); |
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73 |
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74 const Matrix& sceneTransformM = transform.GetHomogeneousMatrix(); |
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75 Matrix r; |
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76 Matrix q; |
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77 LinearAlgebra::RQDecomposition3x3(r, q, sceneTransformM); |
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78 |
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79 // first, put the scene rotation in a cairo matrix |
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80 cairo_matrix_t m; |
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81 cairo_matrix_init( |
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82 &m, q(0, 0), q(1, 0), q(0, 1), q(1, 1), q(0, 2), q(1, 2)); |
| 597 | 83 |
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84 // now let's build the transform piece by piece |
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85 // first translation (directly written in `transform`) |
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86 cairo_matrix_t transform; |
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87 cairo_matrix_init_identity(&transform); |
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88 cairo_matrix_translate(&transform, -halfWidth, -halfHeight); |
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89 |
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90 // then the rotation |
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91 cairo_matrix_multiply(&transform, &transform, &m); |
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92 |
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93 // then the second translation |
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94 { |
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95 cairo_matrix_t translation2; |
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96 cairo_matrix_init_translate(&translation2, halfWidth, halfHeight); |
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97 cairo_matrix_multiply(&transform, &transform, &m); |
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98 } |
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99 |
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100 // then the last translation |
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101 { |
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102 cairo_matrix_t translation3; |
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103 cairo_matrix_init_translate(&translation3, dx, dy); |
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104 cairo_matrix_multiply(&transform, &transform, &translation3); |
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105 } |
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106 cairo_transform(cr, &transform); |
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107 } |
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108 else |
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109 { |
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110 cairo_matrix_t t; |
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111 cairo_matrix_init_identity(&t); |
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112 cairo_matrix_translate(&t, dx, dy); |
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113 cairo_transform(cr, &t); |
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114 } |
| 597 | 115 cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
| 116 cairo_set_source_surface(cr, texture_.GetObject(), 0, 0); | |
| 117 | |
| 118 if (isLinearInterpolation_) | |
| 119 { | |
| 120 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR); | |
| 121 } | |
| 122 else | |
| 123 { | |
| 124 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST); | |
| 125 } | |
| 126 | |
| 127 cairo_paint(cr); | |
| 128 | |
| 129 cairo_restore(cr); | |
| 130 } | |
| 131 } | |
| 132 } |