Mercurial > hg > orthanc-stone
annotate Framework/Scene2D/Internals/OpenGLTextProgram.cpp @ 1313:f30905f5d246 broker
Added support for OnGenericSdlEvent to GuiAdapter.
This makes it possible to piggyback app-specific logic
to special events (here, to support the Viewport refresh
events)
| author | Benjamin Golinvaux <bgo@osimis.io> |
|---|---|
| date | Mon, 16 Mar 2020 11:12:39 +0100 |
| parents | 2d8ab34c8c91 |
| children | 30deba7bc8e2 |
| rev | line source |
|---|---|
| 592 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
| 592 | 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 "OpenGLTextProgram.h" | |
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23 #include "OpenGLShaderVersionDirective.h" |
| 592 | 24 |
| 25 #include "../../Fonts/OpenGLTextCoordinates.h" | |
| 26 | |
| 27 #include <Core/OrthancException.h> | |
| 28 | |
| 29 | |
| 30 static const unsigned int COMPONENTS = 2; | |
| 31 | |
| 32 static const char* VERTEX_SHADER = | |
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33 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 34 "attribute vec2 a_texcoord; \n" |
| 35 "attribute vec4 a_position; \n" | |
| 36 "uniform mat4 u_matrix; \n" | |
| 37 "varying vec2 v_texcoord; \n" | |
| 38 "void main() \n" | |
| 39 "{ \n" | |
| 40 " gl_Position = u_matrix * a_position; \n" | |
| 41 " v_texcoord = a_texcoord; \n" | |
| 42 "}"; | |
| 43 | |
| 44 static const char* FRAGMENT_SHADER = | |
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45 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE |
| 592 | 46 "uniform sampler2D u_texture; \n" |
| 47 "uniform vec3 u_color; \n" | |
| 48 "varying vec2 v_texcoord; \n" | |
| 49 "void main() \n" | |
| 50 "{ \n" | |
| 51 " vec4 v = texture2D(u_texture, v_texcoord); \n" | |
| 52 " gl_FragColor = vec4(u_color * v.w, v.w); \n" // Premultiplied alpha | |
| 53 "}"; | |
| 54 | |
| 55 | |
| 56 namespace OrthancStone | |
| 57 { | |
| 58 namespace Internals | |
| 59 { | |
| 60 OpenGLTextProgram::OpenGLTextProgram(OpenGL::IOpenGLContext& context) : | |
| 61 context_(context) | |
| 62 { | |
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63 if (!context_.IsContextLost()) |
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64 { |
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65 context_.MakeCurrent(); |
| 592 | 66 |
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67 program_.reset(new OpenGL::OpenGLProgram(context_)); |
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68 program_->CompileShaders(VERTEX_SHADER, FRAGMENT_SHADER); |
| 592 | 69 |
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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 } |
| 592 | 73 } |
| 74 | |
| 75 | |
| 76 OpenGLTextProgram::Data::Data(OpenGL::IOpenGLContext& context, | |
| 77 const GlyphTextureAlphabet& alphabet, | |
| 78 const TextSceneLayer& layer) : | |
| 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()), |
| 592 | 83 x_(layer.GetX()), |
| 84 y_(layer.GetY()), | |
| 85 border_(layer.GetBorder()), | |
| 86 anchor_(layer.GetAnchor()) | |
| 87 { | |
| 88 OpenGL::OpenGLTextCoordinates coordinates(alphabet, layer.GetText()); | |
| 89 textWidth_ = coordinates.GetTextWidth(); | |
| 90 textHeight_ = coordinates.GetTextHeight(); | |
| 91 | |
| 92 if (coordinates.IsEmpty()) | |
| 93 { | |
| 94 coordinatesCount_ = 0; | |
| 95 } | |
| 96 else | |
| 97 { | |
| 98 coordinatesCount_ = coordinates.GetRenderingCoords().size(); | |
| 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"); |
| 592 | 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"); |
| 592 | 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 } |
| 592 | 118 } |
| 119 } | |
| 120 | |
| 121 | |
| 122 OpenGLTextProgram::Data::~Data() | |
| 123 { | |
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124 if (!context_.IsContextLost() && !IsEmpty()) |
| 592 | 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()) |
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136 { |
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137 LOG(ERROR) << "OrthancException in ~Data: " << e.What() << " Details: " << e.GetDetails(); |
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138 } |
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139 else |
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140 { |
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141 LOG(ERROR) << "OrthancException in ~Data: " << e.What(); |
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142 } |
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143 } |
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144 catch (const std::exception& e) |
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145 { |
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146 LOG(ERROR) << "std::exception in ~Data: " << e.what(); |
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147 } |
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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 | 152 } |
| 153 } | |
| 154 | |
| 155 | |
| 156 GLuint OpenGLTextProgram::Data::GetSceneLocationsBuffer() const | |
| 157 { | |
| 158 if (IsEmpty()) | |
| 159 { | |
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160 LOG(ERROR) << "OpenGLTextProgram::Data::GetSceneLocationsBuffer(): (IsEmpty())"; |
| 592 | 161 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 162 } | |
| 163 else | |
| 164 { | |
| 165 return buffers_[0]; | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 GLuint OpenGLTextProgram::Data::GetTextureLocationsBuffer() const | |
| 170 { | |
| 171 if (IsEmpty()) | |
| 172 { | |
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173 LOG(ERROR) << "OpenGLTextProgram::Data::GetTextureLocationsBuffer(): (IsEmpty())"; |
| 592 | 174 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 175 } | |
| 176 else | |
| 177 { | |
| 178 return buffers_[1]; | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 void OpenGLTextProgram::Apply(OpenGL::OpenGLTexture& fontTexture, | |
| 183 const Data& data, | |
| 184 const AffineTransform2D& transform) | |
| 185 { | |
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186 if (!context_.IsContextLost() && !data.IsEmpty()) |
| 592 | 187 { |
| 188 context_.MakeCurrent(); | |
| 189 program_->Use(); | |
| 190 | |
| 191 double dx, dy; // In pixels | |
| 192 ComputeAnchorTranslation(dx, dy, data.GetAnchor(), | |
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193 data.GetTextWidth(), data.GetTextHeight(), |
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194 static_cast<unsigned int>(data.GetBorder())); |
| 592 | 195 |
| 196 double x = data.GetX(); | |
| 197 double y = data.GetY(); | |
| 198 transform.Apply(x, y); | |
| 199 | |
| 200 const AffineTransform2D t = AffineTransform2D::CreateOffset(x + dx, y + dy); | |
| 201 | |
| 202 float m[16]; | |
| 203 t.ConvertToOpenGLMatrix(m, context_.GetCanvasWidth(), context_.GetCanvasHeight()); | |
| 204 | |
| 205 fontTexture.Bind(program_->GetUniformLocation("u_texture")); | |
| 206 glUniformMatrix4fv(program_->GetUniformLocation("u_matrix"), 1, GL_FALSE, m); | |
| 207 glUniform3f(program_->GetUniformLocation("u_color"), | |
| 208 data.GetRed(), data.GetGreen(), data.GetBlue()); | |
| 209 | |
| 210 glBindBuffer(GL_ARRAY_BUFFER, data.GetSceneLocationsBuffer()); | |
| 211 glEnableVertexAttribArray(positionLocation_); | |
| 212 glVertexAttribPointer(positionLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 213 | |
| 214 glBindBuffer(GL_ARRAY_BUFFER, data.GetTextureLocationsBuffer()); | |
| 215 glEnableVertexAttribArray(textureLocation_); | |
| 216 glVertexAttribPointer(textureLocation_, COMPONENTS, GL_FLOAT, GL_FALSE, 0, 0); | |
| 217 | |
| 218 glEnable(GL_BLEND); | |
| 219 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); | |
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220 glDrawArrays(GL_TRIANGLES, 0, |
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221 static_cast<GLsizei>(data.GetCoordinatesCount() / COMPONENTS)); |
| 592 | 222 glDisable(GL_BLEND); |
| 223 | |
| 224 glDisableVertexAttribArray(positionLocation_); | |
| 225 glDisableVertexAttribArray(textureLocation_); | |
| 226 } | |
| 227 } | |
| 228 } | |
| 229 } |