annotate OrthancStone/Sources/Scene2D/Internals/OpenGLTextProgram.cpp @ 1512:244ad1e4e76a

reorganization of folders
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 16:21:02 +0200
parents Framework/Scene2D/Internals/OpenGLTextProgram.cpp@30deba7bc8e2
children 92fca2b3ba3d
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "OpenGLTextProgram.h"
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23 #include "OpenGLShaderVersionDirective.h"
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25 #include "../../Fonts/OpenGLTextCoordinates.h"
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26
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27 #include <OrthancException.h>
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30 static const unsigned int COMPONENTS = 2;
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31
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32 static const char* VERTEX_SHADER =
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33 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE
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34 "attribute vec2 a_texcoord; \n"
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35 "attribute vec4 a_position; \n"
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36 "uniform mat4 u_matrix; \n"
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37 "varying vec2 v_texcoord; \n"
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38 "void main() \n"
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39 "{ \n"
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40 " gl_Position = u_matrix * a_position; \n"
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41 " v_texcoord = a_texcoord; \n"
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42 "}";
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43
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44 static const char* FRAGMENT_SHADER =
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45 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE
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46 "uniform sampler2D u_texture; \n"
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47 "uniform vec3 u_color; \n"
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48 "varying vec2 v_texcoord; \n"
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49 "void main() \n"
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50 "{ \n"
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51 " vec4 v = texture2D(u_texture, v_texcoord); \n"
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52 " gl_FragColor = vec4(u_color * v.w, v.w); \n" // Premultiplied alpha
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53 "}";
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55
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56 namespace OrthancStone
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57 {
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58 namespace Internals
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59 {
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60 OpenGLTextProgram::OpenGLTextProgram(OpenGL::IOpenGLContext& context) :
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61 context_(context)
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62 {
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63 if (!context_.IsContextLost())
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64 {
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65 context_.MakeCurrent();
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67 program_.reset(new OpenGL::OpenGLProgram(context_));
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68 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER);
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70 positionLocation_ = program_->GetAttributeLocation("a_position");
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71 textureLocation_ = program_->GetAttributeLocation("a_texcoord");
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72 }
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73 }
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75
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76 OpenGLTextProgram::Data::Data(OpenGL::IOpenGLContext& context,
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77 const GlyphTextureAlphabet& alphabet,
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78 const TextSceneLayer& layer) :
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79 context_(context),
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80 red_(layer.GetColor().GetRedAsFloat()),
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81 green_(layer.GetColor().GetGreenAsFloat()),
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82 blue_(layer.GetColor().GetBlueAsFloat()),
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83 x_(layer.GetX()),
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84 y_(layer.GetY()),
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85 border_(layer.GetBorder()),
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86 anchor_(layer.GetAnchor())
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87 {
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88 OpenGL::OpenGLTextCoordinates coordinates(alphabet, layer.GetText());
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89 textWidth_ = coordinates.GetTextWidth();
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90 textHeight_ = coordinates.GetTextHeight();
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91
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92 if (coordinates.IsEmpty())
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93 {
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94 coordinatesCount_ = 0;
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95 }
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96 else
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97 {
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98 coordinatesCount_ = coordinates.GetRenderingCoords().size();
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99
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100 if (!context_.IsContextLost())
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101 {
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102 context_.MakeCurrent();
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103 glGenBuffers(2, buffers_);
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104 ORTHANC_OPENGL_CHECK("glGenBuffers");
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105
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106 glBindBuffer(GL_ARRAY_BUFFER, buffers_[0]);
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107 ORTHANC_OPENGL_CHECK("glBindBuffer");
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108 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coordinatesCount_,
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109 &coordinates.GetRenderingCoords()[0], GL_STATIC_DRAW);
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110 ORTHANC_OPENGL_CHECK("glBufferData");
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111
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112 glBindBuffer(GL_ARRAY_BUFFER, buffers_[1]);
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113 ORTHANC_OPENGL_CHECK("glBindBuffer");
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114 glBufferData(GL_ARRAY_BUFFER, sizeof(float) * coordinatesCount_,
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115 &coordinates.GetTextureCoords()[0], GL_STATIC_DRAW);
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116 ORTHANC_OPENGL_CHECK("glBufferData");
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117 }
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118 }
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119 }
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121
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122 OpenGLTextProgram::Data::~Data()
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123 {
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124 if (!context_.IsContextLost() && !IsEmpty())
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125 {
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126 try
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127 {
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128 context_.MakeCurrent();
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129 ORTHANC_OPENGL_TRACE_CURRENT_CONTEXT("About to call glDeleteBuffers");
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130 glDeleteBuffers(2, buffers_);
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131 ORTHANC_OPENGL_CHECK("glDeleteBuffers");
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132 }
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133 catch (const Orthanc::OrthancException& e)
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134 {
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135 if (e.HasDetails())
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
parents: 804
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136 {
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
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137 LOG(ERROR) << "OrthancException in ~Data: " << e.What() << " Details: " << e.GetDetails();
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Benjamin Golinvaux <bgo@osimis.io>
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138 }
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
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139 else
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Benjamin Golinvaux <bgo@osimis.io>
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140 {
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
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141 LOG(ERROR) << "OrthancException in ~Data: " << e.What();
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142 }
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Benjamin Golinvaux <bgo@osimis.io>
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143 }
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
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144 catch (const std::exception& e)
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145 {
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
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146 LOG(ERROR) << "std::exception in ~Data: " << e.what();
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147 }
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
parents: 804
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148 catch (...)
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149 {
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150 LOG(ERROR) << "Unknown exception in ~Data";
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151 }
592
bbe29efd3d1c OpenGLLinesProgram
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152 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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153 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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154
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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155
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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156 GLuint OpenGLTextProgram::Data::GetSceneLocationsBuffer() const
bbe29efd3d1c OpenGLLinesProgram
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157 {
bbe29efd3d1c OpenGLLinesProgram
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158 if (IsEmpty())
bbe29efd3d1c OpenGLLinesProgram
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159 {
956
a7351ad54960 Made IsContextLost automatically set the flag by checking with the emscripten
Benjamin Golinvaux <bgo@osimis.io>
parents: 947
diff changeset
160 LOG(ERROR) << "OpenGLTextProgram::Data::GetSceneLocationsBuffer(): (IsEmpty())";
592
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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161 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
bbe29efd3d1c OpenGLLinesProgram
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162 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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163 else
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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164 {
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
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165 return buffers_[0];
bbe29efd3d1c OpenGLLinesProgram
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parents:
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166 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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167 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
168
bbe29efd3d1c OpenGLLinesProgram
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169 GLuint OpenGLTextProgram::Data::GetTextureLocationsBuffer() const
bbe29efd3d1c OpenGLLinesProgram
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parents:
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170 {
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Sebastien Jodogne <s.jodogne@gmail.com>
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171 if (IsEmpty())
bbe29efd3d1c OpenGLLinesProgram
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parents:
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172 {
956
a7351ad54960 Made IsContextLost automatically set the flag by checking with the emscripten
Benjamin Golinvaux <bgo@osimis.io>
parents: 947
diff changeset
173 LOG(ERROR) << "OpenGLTextProgram::Data::GetTextureLocationsBuffer(): (IsEmpty())";
592
bbe29efd3d1c OpenGLLinesProgram
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parents:
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174 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
bbe29efd3d1c OpenGLLinesProgram
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parents:
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175 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
176 else
bbe29efd3d1c OpenGLLinesProgram
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parents:
diff changeset
177 {
bbe29efd3d1c OpenGLLinesProgram
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178 return buffers_[1];
bbe29efd3d1c OpenGLLinesProgram
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parents:
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179 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
180 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
181
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
182 void OpenGLTextProgram::Apply(OpenGL::OpenGLTexture& fontTexture,
bbe29efd3d1c OpenGLLinesProgram
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parents:
diff changeset
183 const Data& data,
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
184 const AffineTransform2D& transform)
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
185 {
947
1091b2adeb5a Fixed animation frame stopping when returning false + big work on the OpenGL
Benjamin Golinvaux <bgo@osimis.io>
parents: 804
diff changeset
186 if (!context_.IsContextLost() && !data.IsEmpty())
592
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
187 {
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
188 context_.MakeCurrent();
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
189 program_->Use();
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
190
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
191 double dx, dy; // In pixels
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
192 ComputeAnchorTranslation(dx, dy, data.GetAnchor(),
693
9a474e90e832 Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents: 611
diff changeset
193 data.GetTextWidth(), data.GetTextHeight(),
9a474e90e832 Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents: 611
diff changeset
194 static_cast<unsigned int>(data.GetBorder()));
592
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
195
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
196 double x = data.GetX();
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
197 double y = data.GetY();
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
198 transform.Apply(x, y);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
199
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
200 const AffineTransform2D t = AffineTransform2D::CreateOffset(x + dx, y + dy);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
201
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
202 float m[16];
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
203 t.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight());
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
204
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
205 fontTexture.Bind(program_->GetUniformLocation("u_texture"));
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
206 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
207 glUniform3f(program_->GetUniformLocation("u_color"),
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
208 data.GetRed(), data.GetGreen(), data.GetBlue());
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
209
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
210 glBindBuffer(GL_ARRAY_BUFFER, data.GetSceneLocationsBuffer());
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
211 glEnableVertexAttribArray(positionLocation_);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
212 glVertexAttribPointer(positionLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
213
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
214 glBindBuffer(GL_ARRAY_BUFFER, data.GetTextureLocationsBuffer());
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
215 glEnableVertexAttribArray(textureLocation_);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
216 glVertexAttribPointer(textureLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
217
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
218 glEnable(GL_BLEND);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
219 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
693
9a474e90e832 Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents: 611
diff changeset
220 glDrawArrays(GL_TRIANGLES, 0,
9a474e90e832 Fixed a bunch of truncation warnings in various parts of the library
Benjamin Golinvaux <bgo@osimis.io>
parents: 611
diff changeset
221 static_cast<GLsizei>(data.GetCoordinatesCount() / COMPONENTS));
592
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
222 glDisable(GL_BLEND);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
223
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
224 glDisableVertexAttribArray(positionLocation_);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
225 glDisableVertexAttribArray(textureLocation_);
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
226 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
227 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
228 }
bbe29efd3d1c OpenGLLinesProgram
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
229 }