Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/CairoFloatTextureRenderer.cpp @ 1739:9ac2a65d4172
upgrade to year 2021
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 06 Jan 2021 17:50:00 +0100 |
| parents | 8563ea5d8ae4 |
| children | 3889ae96d2e9 |
| rev | line source |
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| 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) 2017-2021 Osimis S.A., Belgium |
| 597 | 6 * |
| 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 Lesser General Public License |
| 597 | 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 | |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser 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 Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 597 | 20 **/ |
| 21 | |
| 22 | |
| 23 #include "CairoFloatTextureRenderer.h" | |
| 24 | |
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25 #include "CairoColorTextureRenderer.h" |
| 597 | 26 #include "../FloatTextureSceneLayer.h" |
| 27 | |
| 28 namespace OrthancStone | |
| 29 { | |
| 30 namespace Internals | |
| 31 { | |
| 32 void CairoFloatTextureRenderer::Update(const ISceneLayer& layer) | |
| 33 { | |
| 34 const FloatTextureSceneLayer& l = dynamic_cast<const FloatTextureSceneLayer&>(layer); | |
| 35 | |
| 36 textureTransform_ = l.GetTransform(); | |
| 37 isLinearInterpolation_ = l.IsLinearInterpolation(); | |
| 38 | |
| 39 float windowCenter, windowWidth; | |
| 40 l.GetWindowing(windowCenter, windowWidth); | |
| 41 | |
| 771 | 42 const float a = windowCenter - windowWidth / 2.0f; |
| 770 | 43 const float slope = 256.0f / windowWidth; |
| 597 | 44 |
| 45 const Orthanc::ImageAccessor& source = l.GetTexture(); | |
| 46 const unsigned int width = source.GetWidth(); | |
| 47 const unsigned int height = source.GetHeight(); | |
| 48 texture_.SetSize(width, height, false); | |
| 49 | |
| 50 Orthanc::ImageAccessor target; | |
| 51 texture_.GetWriteableAccessor(target); | |
| 52 | |
| 53 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && | |
| 54 target.GetFormat() == Orthanc::PixelFormat_BGRA32 && | |
| 55 sizeof(float) == 4); | |
| 56 | |
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57 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f); |
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58 |
| 597 | 59 for (unsigned int y = 0; y < height; y++) |
| 60 { | |
| 61 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); | |
| 62 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
| 63 | |
| 64 for (unsigned int x = 0; x < width; x++) | |
| 65 { | |
| 66 float v = (*p - a) * slope; | |
| 67 if (v <= 0) | |
| 68 { | |
| 69 v = 0; | |
| 70 } | |
| 71 else if (v >= 255) | |
| 72 { | |
| 73 v = 255; | |
| 74 } | |
| 75 | |
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76 if (l.IsApplyLog()) |
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77 { |
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78 // https://theailearner.com/2019/01/01/log-transformation/ |
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79 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v)); |
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80 } |
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81 |
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82 assert(v >= 0.0f && v <= 255.0f); |
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83 |
| 597 | 84 uint8_t vv = static_cast<uint8_t>(v); |
| 85 | |
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FloatTextureSceneLayer::SetInverted()
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86 if (l.IsInverted()) |
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FloatTextureSceneLayer::SetInverted()
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87 { |
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FloatTextureSceneLayer::SetInverted()
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88 vv = 255 - vv; |
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FloatTextureSceneLayer::SetInverted()
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89 } |
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FloatTextureSceneLayer::SetInverted()
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90 |
| 597 | 91 q[0] = vv; |
| 92 q[1] = vv; | |
| 93 q[2] = vv; | |
| 94 | |
| 95 p++; | |
| 96 q += 4; | |
| 97 } | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 | |
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102 void CairoFloatTextureRenderer::Render(const AffineTransform2D& transform, |
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103 unsigned int canvasWidth, |
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104 unsigned int canvasHeight) |
| 597 | 105 { |
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106 CairoColorTextureRenderer::RenderColorTexture(target_, transform, texture_, |
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LookupTableTextureSceneLayer
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107 textureTransform_, isLinearInterpolation_); |
| 597 | 108 } |
| 109 } | |
| 110 } |