Mercurial > hg > orthanc-stone
annotate Framework/Layers/GrayscaleFrameRenderer.cpp @ 40:7207a407bcd8
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:37:42 +0100 |
| parents | ff1e935768e7 |
| children | 28956ed68280 |
| 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 | |
|
40
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 | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
| 34 #include "GrayscaleFrameRenderer.h" | |
| 35 | |
| 16 | 36 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 37 |
| 38 namespace OrthancStone | |
| 39 { | |
| 40 CairoSurface* GrayscaleFrameRenderer::GenerateDisplay(const RenderStyle& style) | |
| 41 { | |
| 42 std::auto_ptr<CairoSurface> result; | |
| 43 | |
| 44 float windowCenter, windowWidth; | |
| 45 style.ComputeWindowing(windowCenter, windowWidth, | |
| 46 defaultWindowCenter_, defaultWindowWidth_); | |
| 47 | |
| 48 float x0 = windowCenter - windowWidth / 2.0f; | |
| 49 float x1 = windowCenter + windowWidth / 2.0f; | |
| 50 | |
| 51 //LOG(INFO) << "Window: " << x0 << " => " << x1; | |
| 52 | |
| 53 result.reset(new CairoSurface(frame_->GetWidth(), frame_->GetHeight())); | |
| 54 | |
| 55 const uint8_t* lut = NULL; | |
| 56 if (style.applyLut_) | |
| 57 { | |
| 58 if (Orthanc::EmbeddedResources::GetFileResourceSize(style.lut_) != 3 * 256) | |
| 59 { | |
| 60 // Invalid colormap | |
| 61 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 62 } | |
| 63 | |
| 64 lut = reinterpret_cast<const uint8_t*>(Orthanc::EmbeddedResources::GetFileResourceBuffer(style.lut_)); | |
| 65 } | |
| 66 | |
| 67 Orthanc::ImageAccessor target = result->GetAccessor(); | |
| 68 for (unsigned int y = 0; y < target.GetHeight(); y++) | |
| 69 { | |
| 70 const float* p = reinterpret_cast<const float*>(frame_->GetConstRow(y)); | |
| 71 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
| 72 | |
| 73 for (unsigned int x = 0; x < target.GetWidth(); x++, p++, q += 4) | |
| 74 { | |
| 75 uint8_t v = 0; | |
| 76 if (windowWidth >= 0.001f) // Avoid division by zero | |
| 77 { | |
| 78 if (*p >= x1) | |
| 79 { | |
| 80 v = 255; | |
| 81 } | |
| 82 else if (*p <= x0) | |
| 83 { | |
| 84 v = 0; | |
| 85 } | |
| 86 else | |
| 87 { | |
| 88 // https://en.wikipedia.org/wiki/Linear_interpolation | |
| 89 v = static_cast<uint8_t>(255.0f * (*p - x0) / (x1 - x0)); | |
| 90 } | |
| 91 | |
| 92 if (style.reverse_) | |
| 93 { | |
| 94 v = 255 - v; | |
| 95 } | |
| 96 } | |
| 97 | |
| 98 if (style.applyLut_) | |
| 99 { | |
| 100 assert(lut != NULL); | |
| 101 q[3] = 255; | |
| 102 q[2] = lut[3 * v]; | |
| 103 q[1] = lut[3 * v + 1]; | |
| 104 q[0] = lut[3 * v + 2]; | |
| 105 } | |
| 106 else | |
| 107 { | |
| 108 q[3] = 255; | |
| 109 q[2] = v; | |
| 110 q[1] = v; | |
| 111 q[0] = v; | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 return result.release(); | |
| 117 } | |
| 118 | |
| 119 | |
| 120 GrayscaleFrameRenderer::GrayscaleFrameRenderer(Orthanc::ImageAccessor* frame, | |
| 121 const DicomFrameConverter& converter, | |
| 122 const SliceGeometry& viewportSlice, | |
| 123 const SliceGeometry& frameSlice, | |
| 124 double pixelSpacingX, | |
| 125 double pixelSpacingY, | |
| 126 bool isFullQuality) : | |
| 127 FrameRenderer(viewportSlice, frameSlice, pixelSpacingX, pixelSpacingY, isFullQuality), | |
| 128 frame_(frame), | |
| 129 defaultWindowCenter_(converter.GetDefaultWindowCenter()), | |
| 130 defaultWindowWidth_(converter.GetDefaultWindowWidth()) | |
| 131 { | |
| 132 if (frame == NULL) | |
| 133 { | |
| 134 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 135 } | |
| 136 | |
| 137 converter.ConvertFrame(frame_); | |
| 138 assert(frame_.get() != NULL); | |
| 139 | |
| 140 if (frame_->GetFormat() != Orthanc::PixelFormat_Float32) | |
| 141 { | |
| 142 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 143 } | |
| 144 } | |
| 145 } |