Mercurial > hg > orthanc-stone
comparison Framework/Scene2D/Internals/CairoLookupTableTextureRenderer.cpp @ 768:55411e7da2f7
LookupTableTextureSceneLayer
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 23 May 2019 20:04:33 +0200 |
parents | |
children | 6e888cf6a48b |
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767:dce5b067d040 | 768:55411e7da2f7 |
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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 "CairoLookupTableTextureRenderer.h" | |
23 | |
24 #include "CairoColorTextureRenderer.h" | |
25 #include "../LookupTableTextureSceneLayer.h" | |
26 | |
27 #include <Core/OrthancException.h> | |
28 | |
29 namespace OrthancStone | |
30 { | |
31 namespace Internals | |
32 { | |
33 void CairoLookupTableTextureRenderer::Update(const ISceneLayer& layer) | |
34 { | |
35 const LookupTableTextureSceneLayer& l = dynamic_cast<const LookupTableTextureSceneLayer&>(layer); | |
36 | |
37 textureTransform_ = l.GetTransform(); | |
38 isLinearInterpolation_ = l.IsLinearInterpolation(); | |
39 | |
40 const float a = l.GetMinValue(); | |
41 float slope; | |
42 | |
43 if (l.GetMinValue() >= l.GetMaxValue()) | |
44 { | |
45 slope = 0; | |
46 } | |
47 else | |
48 { | |
49 slope = 256.0f / (l.GetMaxValue() - l.GetMinValue()); | |
50 } | |
51 | |
52 const Orthanc::ImageAccessor& source = l.GetTexture(); | |
53 const unsigned int width = source.GetWidth(); | |
54 const unsigned int height = source.GetHeight(); | |
55 texture_.SetSize(width, height, true /* alpha channel is enabled */); | |
56 | |
57 Orthanc::ImageAccessor target; | |
58 texture_.GetWriteableAccessor(target); | |
59 | |
60 const std::vector<uint8_t>& lut = l.GetLookupTable(); | |
61 if (lut.size() != 4 * 256) | |
62 { | |
63 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
64 } | |
65 | |
66 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && | |
67 target.GetFormat() == Orthanc::PixelFormat_BGRA32 && | |
68 sizeof(float) == 4); | |
69 | |
70 for (unsigned int y = 0; y < height; y++) | |
71 { | |
72 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); | |
73 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
74 | |
75 for (unsigned int x = 0; x < width; x++) | |
76 { | |
77 float v = (*p - a) * slope; | |
78 if (v <= 0) | |
79 { | |
80 v = 0; | |
81 } | |
82 else if (v >= 255) | |
83 { | |
84 v = 255; | |
85 } | |
86 | |
87 uint8_t vv = static_cast<uint8_t>(v); | |
88 | |
89 q[0] = lut[4 * vv + 2]; // B | |
90 q[1] = lut[4 * vv + 1]; // G | |
91 q[2] = lut[4 * vv + 0]; // R | |
92 q[3] = lut[4 * vv + 3]; // A | |
93 | |
94 p++; | |
95 q += 4; | |
96 } | |
97 } | |
98 | |
99 cairo_surface_mark_dirty(texture_.GetObject()); | |
100 } | |
101 | |
102 void CairoLookupTableTextureRenderer::Render(const AffineTransform2D& transform) | |
103 { | |
104 CairoColorTextureRenderer::RenderColorTexture(target_, transform, texture_, | |
105 textureTransform_, isLinearInterpolation_); | |
106 } | |
107 } | |
108 } |