Mercurial > hg > orthanc-stone
annotate Framework/Layers/GrayscaleFrameRenderer.cpp @ 47:28956ed68280
agpl license
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 27 Apr 2017 11:00:15 +0200 |
| parents | 7207a407bcd8 |
| children | f5f54ed8d307 4cff7b1ed31d |
| rev | line source |
|---|---|
| 0 | 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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7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 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. | |
| 0 | 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 | |
| 47 | 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 | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "GrayscaleFrameRenderer.h" | |
| 23 | |
| 16 | 24 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 25 |
| 26 namespace OrthancStone | |
| 27 { | |
| 28 CairoSurface* GrayscaleFrameRenderer::GenerateDisplay(const RenderStyle& style) | |
| 29 { | |
| 30 std::auto_ptr<CairoSurface> result; | |
| 31 | |
| 32 float windowCenter, windowWidth; | |
| 33 style.ComputeWindowing(windowCenter, windowWidth, | |
| 34 defaultWindowCenter_, defaultWindowWidth_); | |
| 35 | |
| 36 float x0 = windowCenter - windowWidth / 2.0f; | |
| 37 float x1 = windowCenter + windowWidth / 2.0f; | |
| 38 | |
| 39 //LOG(INFO) << "Window: " << x0 << " => " << x1; | |
| 40 | |
| 41 result.reset(new CairoSurface(frame_->GetWidth(), frame_->GetHeight())); | |
| 42 | |
| 43 const uint8_t* lut = NULL; | |
| 44 if (style.applyLut_) | |
| 45 { | |
| 46 if (Orthanc::EmbeddedResources::GetFileResourceSize(style.lut_) != 3 * 256) | |
| 47 { | |
| 48 // Invalid colormap | |
| 49 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 50 } | |
| 51 | |
| 52 lut = reinterpret_cast<const uint8_t*>(Orthanc::EmbeddedResources::GetFileResourceBuffer(style.lut_)); | |
| 53 } | |
| 54 | |
| 55 Orthanc::ImageAccessor target = result->GetAccessor(); | |
| 56 for (unsigned int y = 0; y < target.GetHeight(); y++) | |
| 57 { | |
| 58 const float* p = reinterpret_cast<const float*>(frame_->GetConstRow(y)); | |
| 59 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
| 60 | |
| 61 for (unsigned int x = 0; x < target.GetWidth(); x++, p++, q += 4) | |
| 62 { | |
| 63 uint8_t v = 0; | |
| 64 if (windowWidth >= 0.001f) // Avoid division by zero | |
| 65 { | |
| 66 if (*p >= x1) | |
| 67 { | |
| 68 v = 255; | |
| 69 } | |
| 70 else if (*p <= x0) | |
| 71 { | |
| 72 v = 0; | |
| 73 } | |
| 74 else | |
| 75 { | |
| 76 // https://en.wikipedia.org/wiki/Linear_interpolation | |
| 77 v = static_cast<uint8_t>(255.0f * (*p - x0) / (x1 - x0)); | |
| 78 } | |
| 79 | |
| 80 if (style.reverse_) | |
| 81 { | |
| 82 v = 255 - v; | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 if (style.applyLut_) | |
| 87 { | |
| 88 assert(lut != NULL); | |
| 89 q[3] = 255; | |
| 90 q[2] = lut[3 * v]; | |
| 91 q[1] = lut[3 * v + 1]; | |
| 92 q[0] = lut[3 * v + 2]; | |
| 93 } | |
| 94 else | |
| 95 { | |
| 96 q[3] = 255; | |
| 97 q[2] = v; | |
| 98 q[1] = v; | |
| 99 q[0] = v; | |
| 100 } | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 return result.release(); | |
| 105 } | |
| 106 | |
| 107 | |
| 108 GrayscaleFrameRenderer::GrayscaleFrameRenderer(Orthanc::ImageAccessor* frame, | |
| 109 const DicomFrameConverter& converter, | |
| 110 const SliceGeometry& viewportSlice, | |
| 111 const SliceGeometry& frameSlice, | |
| 112 double pixelSpacingX, | |
| 113 double pixelSpacingY, | |
| 114 bool isFullQuality) : | |
| 115 FrameRenderer(viewportSlice, frameSlice, pixelSpacingX, pixelSpacingY, isFullQuality), | |
| 116 frame_(frame), | |
| 117 defaultWindowCenter_(converter.GetDefaultWindowCenter()), | |
| 118 defaultWindowWidth_(converter.GetDefaultWindowWidth()) | |
| 119 { | |
| 120 if (frame == NULL) | |
| 121 { | |
| 122 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 123 } | |
| 124 | |
| 125 converter.ConvertFrame(frame_); | |
| 126 assert(frame_.get() != NULL); | |
| 127 | |
| 128 if (frame_->GetFormat() != Orthanc::PixelFormat_Float32) | |
| 129 { | |
| 130 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 131 } | |
| 132 } | |
| 133 } |