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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) 2017-2019 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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20
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21
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22 #include "CairoFloatTextureRenderer.h"
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23
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24 #include "../FloatTextureSceneLayer.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 CairoFloatTextureRenderer::Update(const ISceneLayer& layer)
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31 {
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32 const FloatTextureSceneLayer& l = dynamic_cast<const FloatTextureSceneLayer&>(layer);
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33
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34 textureTransform_ = l.GetTransform();
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35 isLinearInterpolation_ = l.IsLinearInterpolation();
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36
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37 float windowCenter, windowWidth;
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38 l.GetWindowing(windowCenter, windowWidth);
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39
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40 const float a = windowCenter - windowWidth;
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41 const float slope = 256.0f / (2.0f * windowWidth);
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42
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43 const Orthanc::ImageAccessor& source = l.GetTexture();
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44 const unsigned int width = source.GetWidth();
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45 const unsigned int height = source.GetHeight();
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46 texture_.SetSize(width, height, false);
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47
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48 Orthanc::ImageAccessor target;
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49 texture_.GetWriteableAccessor(target);
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50
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51 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 &&
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52 target.GetFormat() == Orthanc::PixelFormat_BGRA32 &&
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53 sizeof(float) == 4);
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54
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55 for (unsigned int y = 0; y < height; y++)
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56 {
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57 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y));
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58 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y));
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59
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60 for (unsigned int x = 0; x < width; x++)
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61 {
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62 float v = (*p - a) * slope;
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63 if (v <= 0)
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64 {
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65 v = 0;
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66 }
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67 else if (v >= 255)
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68 {
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69 v = 255;
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70 }
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71
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72 uint8_t vv = static_cast<uint8_t>(v);
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73
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74 q[0] = vv;
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75 q[1] = vv;
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76 q[2] = vv;
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77
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78 p++;
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79 q += 4;
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80 }
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81 }
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82 }
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83
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84
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85 void CairoFloatTextureRenderer::Render(const AffineTransform2D& transform)
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86 {
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87 cairo_t* cr = target_.GetCairoContext();
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88
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89 AffineTransform2D t =
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90 AffineTransform2D::Combine(transform, textureTransform_);
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91 Matrix h = t.GetHomogeneousMatrix();
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92
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93 cairo_save(cr);
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94
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95 cairo_matrix_t m;
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96 cairo_matrix_init(&m, h(0, 0), h(1, 0), h(0, 1), h(1, 1), h(0, 2), h(1, 2));
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97 cairo_transform(cr, &m);
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98
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99 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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100 cairo_set_source_surface(cr, texture_.GetObject(), 0, 0);
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101
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102 if (isLinearInterpolation_)
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103 {
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104 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR);
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105 }
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106 else
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107 {
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108 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
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109 }
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110
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111 cairo_paint(cr);
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112
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113 cairo_restore(cr);
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114 }
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115 }
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116 }
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