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annotate OrthancStone/Sources/Scene2D/Internals/OpenGLColorTextureProgram.cpp @ 1870:3889ae96d2e9

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added copyright UCLouvain
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:04:09 +0100
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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) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "OpenGLColorTextureProgram.h"
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25 #include "OpenGLShaderVersionDirective.h"
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27 static const char* FRAGMENT_SHADER =
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28 ORTHANC_STONE_OPENGL_SHADER_VERSION_DIRECTIVE
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29 "uniform sampler2D u_texture; \n"
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30 "varying vec2 v_texcoord; \n"
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31 "void main() \n"
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32 "{ \n"
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33 " gl_FragColor = texture2D(u_texture, v_texcoord); \n"
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34 "}";
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37 namespace OrthancStone
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38 {
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39 namespace Internals
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40 {
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41 OpenGLColorTextureProgram::OpenGLColorTextureProgram(OpenGL::IOpenGLContext& context)
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42 : program_(context, FRAGMENT_SHADER)
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43 , context_(context)
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44 {
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45 }
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48 void OpenGLColorTextureProgram::Apply(OpenGL::OpenGLTexture& texture,
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49 const AffineTransform2D& transform,
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50 unsigned int canvasWidth,
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51 unsigned int canvasHeight,
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52 bool useAlpha)
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53 {
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54 if (!context_.IsContextLost())
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55 {
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56 OpenGLTextureProgram::Execution execution(program_, texture, transform, canvasWidth, canvasHeight);
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57
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58 if (useAlpha)
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59 {
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60 glEnable(GL_BLEND);
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61 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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62 execution.DrawTriangles();
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63 glDisable(GL_BLEND);
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64 }
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65 else
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66 {
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67 execution.DrawTriangles();
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68 }
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69 }
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70 }
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71 }
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72 }