Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/CairoFloatTextureRenderer.cpp @ 1179:177e7d431cd1 broker
log scale in textures, remove redundant code for LUTs
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 20 Nov 2019 15:24:20 +0100 |
| parents | 6e79e8c9021c |
| children | 0ca50d275b9a |
| 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 | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 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 "CairoFloatTextureRenderer.h" | |
| 23 | |
|
768
55411e7da2f7
LookupTableTextureSceneLayer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
597
diff
changeset
|
24 #include "CairoColorTextureRenderer.h" |
| 597 | 25 #include "../FloatTextureSceneLayer.h" |
| 26 | |
| 27 namespace OrthancStone | |
| 28 { | |
| 29 namespace Internals | |
| 30 { | |
| 31 void CairoFloatTextureRenderer::Update(const ISceneLayer& layer) | |
| 32 { | |
| 33 const FloatTextureSceneLayer& l = dynamic_cast<const FloatTextureSceneLayer&>(layer); | |
| 34 | |
| 35 textureTransform_ = l.GetTransform(); | |
| 36 isLinearInterpolation_ = l.IsLinearInterpolation(); | |
| 37 | |
| 38 float windowCenter, windowWidth; | |
| 39 l.GetWindowing(windowCenter, windowWidth); | |
| 40 | |
| 771 | 41 const float a = windowCenter - windowWidth / 2.0f; |
| 770 | 42 const float slope = 256.0f / windowWidth; |
| 597 | 43 |
| 44 const Orthanc::ImageAccessor& source = l.GetTexture(); | |
| 45 const unsigned int width = source.GetWidth(); | |
| 46 const unsigned int height = source.GetHeight(); | |
| 47 texture_.SetSize(width, height, false); | |
| 48 | |
| 49 Orthanc::ImageAccessor target; | |
| 50 texture_.GetWriteableAccessor(target); | |
| 51 | |
| 52 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && | |
| 53 target.GetFormat() == Orthanc::PixelFormat_BGRA32 && | |
| 54 sizeof(float) == 4); | |
| 55 | |
|
1179
177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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56 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f); |
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log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
|
57 |
| 597 | 58 for (unsigned int y = 0; y < height; y++) |
| 59 { | |
| 60 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); | |
| 61 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
| 62 | |
| 63 for (unsigned int x = 0; x < width; x++) | |
| 64 { | |
| 65 float v = (*p - a) * slope; | |
| 66 if (v <= 0) | |
| 67 { | |
| 68 v = 0; | |
| 69 } | |
| 70 else if (v >= 255) | |
| 71 { | |
| 72 v = 255; | |
| 73 } | |
| 74 | |
|
1179
177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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75 if (l.IsApplyLog()) |
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177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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76 { |
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177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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77 // https://theailearner.com/2019/01/01/log-transformation/ |
|
177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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78 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v)); |
|
177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
|
79 } |
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177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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80 |
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177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
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81 assert(v >= 0.0f && v <= 255.0f); |
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177e7d431cd1
log scale in textures, remove redundant code for LUTs
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
889
diff
changeset
|
82 |
| 597 | 83 uint8_t vv = static_cast<uint8_t>(v); |
| 84 | |
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FloatTextureSceneLayer::SetInverted()
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parents:
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85 if (l.IsInverted()) |
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FloatTextureSceneLayer::SetInverted()
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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86 { |
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FloatTextureSceneLayer::SetInverted()
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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87 vv = 255 - vv; |
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FloatTextureSceneLayer::SetInverted()
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
changeset
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88 } |
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b8dfd966b5f4
FloatTextureSceneLayer::SetInverted()
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
changeset
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89 |
| 597 | 90 q[0] = vv; |
| 91 q[1] = vv; | |
| 92 q[2] = vv; | |
| 93 | |
| 94 p++; | |
| 95 q += 4; | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 | |
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renderers now have access to canvas width/height
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
changeset
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101 void CairoFloatTextureRenderer::Render(const AffineTransform2D& transform, |
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6e888cf6a48b
renderers now have access to canvas width/height
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
773
diff
changeset
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102 unsigned int canvasWidth, |
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6e888cf6a48b
renderers now have access to canvas width/height
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
773
diff
changeset
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103 unsigned int canvasHeight) |
| 597 | 104 { |
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768
55411e7da2f7
LookupTableTextureSceneLayer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
597
diff
changeset
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105 CairoColorTextureRenderer::RenderColorTexture(target_, transform, texture_, |
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55411e7da2f7
LookupTableTextureSceneLayer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
597
diff
changeset
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106 textureTransform_, isLinearInterpolation_); |
| 597 | 107 } |
| 108 } | |
| 109 } |