Mercurial > hg > orthanc-stone
comparison Framework/Scene2D/Internals/CairoFloatTextureRenderer.cpp @ 597:9e51fb773bbd
CairoCompositor
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 26 Apr 2019 17:28:18 +0200 |
parents | |
children | 55411e7da2f7 cfb4d39065a4 |
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596:b716763571ad | 597:9e51fb773bbd |
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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 "CairoFloatTextureRenderer.h" | |
23 | |
24 #include "../FloatTextureSceneLayer.h" | |
25 | |
26 namespace OrthancStone | |
27 { | |
28 namespace Internals | |
29 { | |
30 void CairoFloatTextureRenderer::Update(const ISceneLayer& layer) | |
31 { | |
32 const FloatTextureSceneLayer& l = dynamic_cast<const FloatTextureSceneLayer&>(layer); | |
33 | |
34 textureTransform_ = l.GetTransform(); | |
35 isLinearInterpolation_ = l.IsLinearInterpolation(); | |
36 | |
37 float windowCenter, windowWidth; | |
38 l.GetWindowing(windowCenter, windowWidth); | |
39 | |
40 const float a = windowCenter - windowWidth; | |
41 const float slope = 256.0f / (2.0f * windowWidth); | |
42 | |
43 const Orthanc::ImageAccessor& source = l.GetTexture(); | |
44 const unsigned int width = source.GetWidth(); | |
45 const unsigned int height = source.GetHeight(); | |
46 texture_.SetSize(width, height, false); | |
47 | |
48 Orthanc::ImageAccessor target; | |
49 texture_.GetWriteableAccessor(target); | |
50 | |
51 assert(source.GetFormat() == Orthanc::PixelFormat_Float32 && | |
52 target.GetFormat() == Orthanc::PixelFormat_BGRA32 && | |
53 sizeof(float) == 4); | |
54 | |
55 for (unsigned int y = 0; y < height; y++) | |
56 { | |
57 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y)); | |
58 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
59 | |
60 for (unsigned int x = 0; x < width; x++) | |
61 { | |
62 float v = (*p - a) * slope; | |
63 if (v <= 0) | |
64 { | |
65 v = 0; | |
66 } | |
67 else if (v >= 255) | |
68 { | |
69 v = 255; | |
70 } | |
71 | |
72 uint8_t vv = static_cast<uint8_t>(v); | |
73 | |
74 q[0] = vv; | |
75 q[1] = vv; | |
76 q[2] = vv; | |
77 | |
78 p++; | |
79 q += 4; | |
80 } | |
81 } | |
82 } | |
83 | |
84 | |
85 void CairoFloatTextureRenderer::Render(const AffineTransform2D& transform) | |
86 { | |
87 cairo_t* cr = target_.GetCairoContext(); | |
88 | |
89 AffineTransform2D t = | |
90 AffineTransform2D::Combine(transform, textureTransform_); | |
91 Matrix h = t.GetHomogeneousMatrix(); | |
92 | |
93 cairo_save(cr); | |
94 | |
95 cairo_matrix_t m; | |
96 cairo_matrix_init(&m, h(0, 0), h(1, 0), h(0, 1), h(1, 1), h(0, 2), h(1, 2)); | |
97 cairo_transform(cr, &m); | |
98 | |
99 cairo_set_operator(cr, CAIRO_OPERATOR_OVER); | |
100 cairo_set_source_surface(cr, texture_.GetObject(), 0, 0); | |
101 | |
102 if (isLinearInterpolation_) | |
103 { | |
104 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR); | |
105 } | |
106 else | |
107 { | |
108 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST); | |
109 } | |
110 | |
111 cairo_paint(cr); | |
112 | |
113 cairo_restore(cr); | |
114 } | |
115 } | |
116 } |