Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLFloatTextureProgram.cpp @ 876:580dd82e13f5 am-dev
added GetApproximateMemoryUsage
author | Alain Mazy <alain@mazy.be> |
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date | Wed, 03 Jul 2019 10:15:29 +0200 |
parents | ed783cbc92d7 |
children | 4d1f57773b5b |
rev | line source |
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591 | 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 "OpenGLFloatTextureProgram.h" | |
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
592
diff
changeset
|
23 #include "OpenGLShaderVersionDirective.h" |
591 | 24 |
25 #include <Core/OrthancException.h> | |
26 #include <Core/Images/Image.h> | |
27 #include <Core/Images/ImageProcessing.h> | |
28 | |
29 | |
30 static const char* FRAGMENT_SHADER = | |
611
e3f21a265be5
Added version directive to GLSL shader code + glew init function in sample code
Benjamin Golinvaux <bgo@osimis.io>
parents:
592
diff
changeset
|
31 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
771 | 32 "uniform float u_offset; \n" |
33 "uniform float u_slope; \n" | |
34 "uniform float u_windowCenter; \n" | |
35 "uniform float u_windowWidth; \n" | |
36 "uniform sampler2D u_texture; \n" | |
37 "varying vec2 v_texcoord; \n" | |
38 "void main() \n" | |
39 "{ \n" | |
40 " vec4 t = texture2D(u_texture, v_texcoord); \n" | |
41 " float v = (t.r * 256.0 + t.g) * 256.0; \n" | |
42 " v = v * u_slope + u_offset; \n" // (*) | |
43 " float a = u_windowCenter - u_windowWidth / 2.0; \n" | |
44 " float dy = 1.0 / u_windowWidth; \n" | |
45 " if (v <= a) \n" | |
46 " v = 0.0; \n" | |
47 " else \n" | |
48 " { \n" | |
49 " v = (v - a) * dy; \n" | |
50 " if (v >= 1.0) \n" | |
51 " v = 1.0; \n" | |
52 " } \n" | |
53 " gl_FragColor = vec4(v, v, v, 1); \n" | |
591 | 54 "}"; |
55 | |
56 | |
57 namespace OrthancStone | |
58 { | |
59 namespace Internals | |
60 { | |
61 OpenGLFloatTextureProgram::Data::Data(const Orthanc::ImageAccessor& texture, | |
62 bool isLinearInterpolation) | |
63 { | |
64 if (texture.GetFormat() != Orthanc::PixelFormat_Float32) | |
65 { | |
66 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
67 } | |
68 | |
69 float minValue, maxValue; | |
70 Orthanc::ImageProcessing::GetMinMaxFloatValue(minValue, maxValue, texture); | |
71 | |
72 offset_ = minValue; | |
73 | |
74 if (LinearAlgebra::IsCloseToZero(maxValue - minValue)) | |
75 { | |
76 slope_ = 1; | |
77 } | |
78 else | |
79 { | |
80 slope_ = (maxValue - minValue) / 65536.0f; | |
81 assert(!LinearAlgebra::IsCloseToZero(slope_)); | |
82 } | |
83 | |
84 const unsigned int width = texture.GetWidth(); | |
85 const unsigned int height = texture.GetHeight(); | |
86 | |
87 Orthanc::Image converted(Orthanc::PixelFormat_RGB24, width, height, true); | |
88 | |
89 for (unsigned int y = 0; y < height; y++) | |
90 { | |
91 const float *p = reinterpret_cast<const float*>(texture.GetConstRow(y)); | |
92 uint8_t *q = reinterpret_cast<uint8_t*>(converted.GetRow(y)); | |
93 | |
94 for (unsigned int x = 0; x < width; x++) | |
95 { | |
96 /** | |
97 * At (*), the floating-point "value" is reconstructed as | |
98 * "value = texture * slope + offset". | |
99 * <=> texture = (value - offset) / slope | |
100 **/ | |
101 | |
102 float texture = (*p - offset_) / slope_; | |
103 if (texture < 0) | |
104 { | |
105 texture = 0; | |
106 } | |
107 else if (texture >= 65535.0f) | |
108 { | |
109 texture = 65535.0f; | |
110 } | |
111 | |
112 uint16_t t = static_cast<uint16_t>(texture); | |
113 | |
114 q[0] = t / 256; // red | |
115 q[1] = t % 256; // green | |
116 q[2] = 0; // blue is unused | |
117 | |
118 p++; | |
119 q += 3; | |
120 } | |
121 } | |
122 | |
123 texture_.Load(converted, isLinearInterpolation); | |
124 } | |
125 | |
126 | |
592 | 127 OpenGLFloatTextureProgram::OpenGLFloatTextureProgram(OpenGL::IOpenGLContext& context) : |
128 program_(context, FRAGMENT_SHADER) | |
129 { | |
130 } | |
131 | |
132 | |
591 | 133 void OpenGLFloatTextureProgram::Apply(Data& data, |
134 const AffineTransform2D& transform, | |
135 float windowCenter, | |
136 float windowWidth) | |
137 { | |
138 OpenGLTextureProgram::Execution execution(program_, data.GetTexture(), transform); | |
139 | |
140 glUniform1f(execution.GetUniformLocation("u_slope"), data.GetSlope()); | |
141 glUniform1f(execution.GetUniformLocation("u_offset"), data.GetOffset()); | |
142 glUniform1f(execution.GetUniformLocation("u_windowCenter"), windowCenter); | |
143 glUniform1f(execution.GetUniformLocation("u_windowWidth"), windowWidth); | |
144 | |
145 execution.DrawTriangles(); | |
146 } | |
147 } | |
148 } |