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comparison OrthancStone/Sources/Scene2D/Internals/CairoFloatTextureRenderer.cpp @ 1512:244ad1e4e76a

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reorganization of folders
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 16:21:02 +0200
parents Framework/Scene2D/Internals/CairoFloatTextureRenderer.cpp@7ec8fea061b9
children 4fb8fdf03314
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1511:9dfeee74c1e6 1512:244ad1e4e76a
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2020 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
24 #include "CairoColorTextureRenderer.h"
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
41 const float a = windowCenter - windowWidth / 2.0f;
42 const float slope = 256.0f / windowWidth;
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
56 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f);
57
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
75 if (l.IsApplyLog())
76 {
77 // https://theailearner.com/2019/01/01/log-transformation/
78 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v));
79 }
80
81 assert(v >= 0.0f && v <= 255.0f);
82
83 uint8_t vv = static_cast<uint8_t>(v);
84
85 if (l.IsInverted())
86 {
87 vv = 255 - vv;
88 }
89
90 q[0] = vv;
91 q[1] = vv;
92 q[2] = vv;
93
94 p++;
95 q += 4;
96 }
97 }
98 }
99
100
101 void CairoFloatTextureRenderer::Render(const AffineTransform2D& transform,
102 unsigned int canvasWidth,
103 unsigned int canvasHeight)
104 {
105 CairoColorTextureRenderer::RenderColorTexture(target_, transform, texture_,
106 textureTransform_, isLinearInterpolation_);
107 }
108 }
109 }