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72 lines
3.1 KiB
C++
72 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2015-2019 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// Copyright (C) 2022 Jon Beniston, M7RCE <jon@beniston.com> //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_GUI_GLSHADERCOLORMAP_H_
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#define INCLUDE_GUI_GLSHADERCOLORMAP_H_
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#include <QString>
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#include <QOpenGLTexture>
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#include <QOpenGLFunctions>
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#include <QOpenGLVertexArrayObject>
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#include <QOpenGLBuffer>
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#include "export.h"
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class QOpenGLShaderProgram;
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class QMatrix4x4;
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class QVector4D;
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// Shader to fill with a gradient from a color map
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// Used for filling the area under the spectrum
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class SDRGUI_API GLShaderColorMap : protected QOpenGLFunctions
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{
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public:
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GLShaderColorMap();
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~GLShaderColorMap();
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void initializeGL(int majorVersion, int minorVersion);
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void initColorMapTexture(const QString &colorMapName);
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void drawSurfaceStrip(const QMatrix4x4& transformMatrix, GLfloat *vertices, int nbVertices, float scale, float alpha);
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void cleanup();
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private:
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void initColorMapTextureMutable(const QString &colorMapName);
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void initColorMapTextureImmutable(const QString &colorMapName);
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bool useImmutableStorage();
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QOpenGLShaderProgram *m_program;
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QOpenGLVertexArrayObject *m_vao;
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QOpenGLBuffer *m_verticesBuf;
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QOpenGLTexture *m_colorMapTexture;
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unsigned int m_colorMapTextureId;
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int m_vertexLoc;
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int m_matrixLoc;
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int m_colorMapLoc;
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int m_scaleLoc;
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int m_alphaLoc;
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bool m_useImmutableStorage;
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static const QString m_vertexShaderSourceColorMap2;
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static const QString m_vertexShaderSourceColorMap;
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static const QString m_fragmentShaderSourceColorMap2;
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static const QString m_fragmentShaderSourceColorMap;
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};
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#endif /* INCLUDE_GUI_GLSHADERCOLORMAP_H_ */
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