Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/OpenGLInfoPanelRenderer.cpp @ 1556:8898f8f755c8
typo
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 18 Aug 2020 11:58:47 +0200 |
| parents | 244ad1e4e76a |
| children | 92fca2b3ba3d |
| rev | line source |
|---|---|
| 594 | 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 |
| 594 | 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 "OpenGLInfoPanelRenderer.h" | |
| 23 | |
| 24 namespace OrthancStone | |
| 25 { | |
| 26 namespace Internals | |
| 27 { | |
| 28 void OpenGLInfoPanelRenderer::LoadTexture(const InfoPanelSceneLayer& layer) | |
| 29 { | |
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30 if (!context_.IsContextLost()) |
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31 { |
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32 context_.MakeCurrent(); |
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33 texture_.reset(new OpenGL::OpenGLTexture(context_)); |
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34 texture_->Load(layer.GetTexture(), layer.IsLinearInterpolation()); |
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35 applySceneRotation_ = layer.ShouldApplySceneRotation(); |
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36 anchor_ = layer.GetAnchor(); |
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37 } |
| 594 | 38 } |
| 39 | |
| 40 OpenGLInfoPanelRenderer::OpenGLInfoPanelRenderer(OpenGL::IOpenGLContext& context, | |
| 41 OpenGLColorTextureProgram& program, | |
| 42 const InfoPanelSceneLayer& layer) : | |
| 43 context_(context), | |
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44 program_(program), |
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45 anchor_(BitmapAnchor_TopLeft), |
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46 applySceneRotation_(false) |
| 594 | 47 { |
| 48 LoadTexture(layer); | |
| 49 } | |
| 50 | |
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51 void OpenGLInfoPanelRenderer::Render(const AffineTransform2D& transform, |
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52 unsigned int canvasWidth, |
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53 unsigned int canvasHeight) |
| 594 | 54 { |
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55 if (!context_.IsContextLost() && texture_.get() != NULL) |
| 594 | 56 { |
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57 int dx = 0, dy = 0; |
| 594 | 58 InfoPanelSceneLayer::ComputeAnchorLocation( |
| 59 dx, dy, anchor_, texture_->GetWidth(), texture_->GetHeight(), | |
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60 canvasWidth, canvasHeight); |
| 594 | 61 |
| 62 // The position of this type of layer is layer: Ignore the | |
| 63 // "transform" coming from the scene | |
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64 AffineTransform2D actualTransform = |
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65 AffineTransform2D::CreateOffset(dx, dy); |
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66 |
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67 if (applySceneRotation_) |
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68 { |
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69 // the transformation is as follows: |
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70 // - originally, the image is aligned so that its top left corner |
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71 // is at 0,0 |
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72 // - first, we translate the image by -w/2,-h/2 |
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73 // - then we rotate it, so that the next rotation will make the |
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74 // image rotate around its center. |
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75 // - then, we translate the image by +w/2,+h/2 to put it |
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76 // back in place |
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77 // - the fourth and last transform is the one that brings the |
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78 // image to its desired anchored location. |
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79 |
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80 int32_t halfWidth = |
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81 static_cast<int32_t>(0.5 * texture_->GetWidth()); |
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82 |
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83 int32_t halfHeight= |
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84 static_cast<int32_t>(0.5 * texture_->GetHeight()); |
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85 |
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86 AffineTransform2D translation1 = |
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87 AffineTransform2D::CreateOffset(-halfWidth, -halfHeight); |
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88 |
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89 const Matrix& sceneTransformM = transform.GetHomogeneousMatrix(); |
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90 Matrix r; |
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91 Matrix q; |
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92 LinearAlgebra::RQDecomposition3x3(r, q, sceneTransformM); |
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93 |
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94 // counterintuitively, q is the rotation and r is the upper |
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95 // triangular |
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96 AffineTransform2D rotation(q); |
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97 |
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98 AffineTransform2D translation2 = |
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99 AffineTransform2D::CreateOffset(halfWidth, halfHeight); |
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100 |
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101 // please note that the last argument is the 1st applied |
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102 // transformation (rationale: if arguments are a, b and c, then |
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103 // the resulting matrix is a*b*c: |
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104 // x2 = (a*b*c)*x1 = (a*(b*(c*x1))) (you can see that the result |
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105 // of c*x1 is transformed by b, and the result of b*c*x1 is trans- |
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106 // formed by a) |
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107 actualTransform = AffineTransform2D::Combine(actualTransform, |
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108 translation2, |
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109 rotation, |
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110 translation1); |
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111 } |
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112 |
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113 program_.Apply(*texture_, actualTransform, true); |
| 594 | 114 } |
| 115 } | |
| 116 } | |
| 117 } |