sdrangel/sdrgui/gui/glshadercolormap.h

70 wiersze
2.9 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 Edouard Griffiths, F4EXB //
// Copyright (C) 2022 Jon Beniston, M7RCE //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_GUI_GLSHADERCOLORMAP_H_
#define INCLUDE_GUI_GLSHADERCOLORMAP_H_
#include <QString>
#include <QOpenGLTexture>
#include <QOpenGLFunctions>
#include <QOpenGLVertexArrayObject>
#include <QOpenGLBuffer>
#include "export.h"
class QOpenGLShaderProgram;
class QMatrix4x4;
class QVector4D;
// Shader to fill with a gradient from a color map
// Used for filling the area under the spectrum
class SDRGUI_API GLShaderColorMap : protected QOpenGLFunctions
{
public:
GLShaderColorMap();
~GLShaderColorMap();
void initializeGL(int majorVersion, int minorVersion);
void initColorMapTexture(const QString &colorMapName);
void drawSurfaceStrip(const QMatrix4x4& transformMatrix, GLfloat *vertices, int nbVertices, float scale, float alpha);
void cleanup();
private:
void initColorMapTextureMutable(const QString &colorMapName);
void initColorMapTextureImmutable(const QString &colorMapName);
bool useImmutableStorage();
QOpenGLShaderProgram *m_program;
QOpenGLVertexArrayObject *m_vao;
QOpenGLBuffer *m_verticesBuf;
QOpenGLTexture *m_colorMapTexture;
unsigned int m_colorMapTextureId;
int m_vertexLoc;
int m_matrixLoc;
int m_colorMapLoc;
int m_scaleLoc;
int m_alphaLoc;
bool m_useImmutableStorage;
static const QString m_vertexShaderSourceColorMap2;
static const QString m_vertexShaderSourceColorMap;
static const QString m_fragmentShaderSourceColorMap2;
static const QString m_fragmentShaderSourceColorMap;
};
#endif /* INCLUDE_GUI_GLSHADERCOLORMAP_H_ */