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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) 2017-2019 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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20
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21
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22 #include "OpenGLColorTextureProgram.h"
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23
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24
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25 static const char* FRAGMENT_SHADER =
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26 "uniform sampler2D u_texture; \n"
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27 "varying vec2 v_texcoord; \n"
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28 "void main() \n"
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29 "{ \n"
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30 " gl_FragColor = texture2D(u_texture, v_texcoord); \n"
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31 "}";
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32
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33
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34 namespace OrthancStone
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35 {
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36 namespace Internals
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37 {
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38 OpenGLColorTextureProgram::OpenGLColorTextureProgram(OpenGL::IOpenGLContext& context) :
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39 program_(context, FRAGMENT_SHADER)
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40 {
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41 }
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42
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43
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44 void OpenGLColorTextureProgram::Apply(OpenGL::OpenGLTexture& texture,
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45 const AffineTransform2D& transform,
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46 bool useAlpha)
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47 {
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48 OpenGLTextureProgram::Execution execution(program_, texture, transform);
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49
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50 if (useAlpha)
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51 {
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52 glEnable(GL_BLEND);
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53 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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54 execution.DrawTriangles();
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55 glDisable(GL_BLEND);
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56 }
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57 else
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58 {
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59 execution.DrawTriangles();
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60 }
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61 }
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62 }
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63 }
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