GLShaderSimple Class Reference

#include <glshadersimple.h>

Public Member Functions
	GLShaderSimple ()
	~GLShaderSimple ()
void	initializeGL ()
void	drawPoints (const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)
void	drawPolyline (const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)
void	drawSegments (const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)
void	drawContour (const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)
void	drawSurface (const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)
void	cleanup ()

Private Member Functions
void	draw (unsigned int mode, const QMatrix4x4 &transformMatrix, const QVector4D &color, GLfloat *vertices, int nbVertices)

Private Attributes
QOpenGLShaderProgram *	m_program
int	m_matrixLoc
int	m_colorLoc

Static Private Attributes
static const QString	m_vertexShaderSourceSimple
static const QString	m_fragmentShaderSourceColored

Detailed Description

Definition at line 31 of file glshadersimple.h.

Constructor & Destructor Documentation

GLShaderSimple()

GLShaderSimple::GLShaderSimple

(

)

Definition at line 28 of file glshadersimple.cpp.

                               :
    m_program(0),
    m_matrixLoc(0),
    m_colorLoc(0)
{ }

~GLShaderSimple()

GLShaderSimple::~GLShaderSimple

(

)

Definition at line 34 of file glshadersimple.cpp.

References cleanup().

{
    cleanup();
}

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Member Function Documentation

cleanup()

void GLShaderSimple::cleanup

(

)

Definition at line 104 of file glshadersimple.cpp.

References m_fragmentShaderSourceColored, m_program, and m_vertexShaderSourceSimple.

Referenced by GLScope::cleanup(), GLSpectrum::cleanup(), and ~GLShaderSimple().

{
    if (m_program)
    {
        delete m_program;
        m_program = 0;
    }
}

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draw()

void GLShaderSimple::draw ( unsigned int  mode, const QMatrix4x4 &  transformMatrix, const QVector4D &  color, GLfloat *  vertices, int  nbVertices  )

private

Definition at line 88 of file glshadersimple.cpp.

References m_colorLoc, m_matrixLoc, and m_program.

Referenced by drawContour(), drawPoints(), drawPolyline(), drawSegments(), and drawSurface().

{
    QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
    m_program->bind();
    m_program->setUniformValue(m_matrixLoc, transformMatrix);
    m_program->setUniformValue(m_colorLoc, color);
    f->glEnable(GL_BLEND);
    f->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    f->glLineWidth(1.0f);
    f->glEnableVertexAttribArray(0); // vertex
    f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices);
    f->glDrawArrays(mode, 0, nbVertices);
    f->glDisableVertexAttribArray(0);
    m_program->release();
}

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drawContour()

void GLShaderSimple::drawContour	(	const QMatrix4x4 &	transformMatrix,
		const QVector4D &	color,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 78 of file glshadersimple.cpp.

References draw().

Referenced by GLScope::paintGL(), and GLSpectrum::paintGL().

{
    draw(GL_LINE_LOOP, transformMatrix, color, vertices, nbVertices);
}

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drawPoints()

void GLShaderSimple::drawPoints	(	const QMatrix4x4 &	transformMatrix,
		const QVector4D &	color,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 63 of file glshadersimple.cpp.

References draw().

Referenced by GLScope::paintGL().

{
    draw(GL_POINTS, transformMatrix, color, vertices, nbVertices);
}

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drawPolyline()

void GLShaderSimple::drawPolyline	(	const QMatrix4x4 &	transformMatrix,
		const QVector4D &	color,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 68 of file glshadersimple.cpp.

References draw().

Referenced by GLScope::paintGL(), and GLSpectrum::paintGL().

{
    draw(GL_LINE_STRIP, transformMatrix, color, vertices, nbVertices);
}

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drawSegments()

void GLShaderSimple::drawSegments	(	const QMatrix4x4 &	transformMatrix,
		const QVector4D &	color,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 73 of file glshadersimple.cpp.

References draw().

Referenced by GLScope::paintGL(), and GLSpectrum::paintGL().

{
    draw(GL_LINES, transformMatrix, color, vertices, nbVertices);
}

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drawSurface()

void GLShaderSimple::drawSurface	(	const QMatrix4x4 &	transformMatrix,
		const QVector4D &	color,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 83 of file glshadersimple.cpp.

References draw().

Referenced by GLSpectrum::paintGL().

{
    draw(GL_TRIANGLE_FAN, transformMatrix, color, vertices, nbVertices);
}

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initializeGL()

void GLShaderSimple::initializeGL

(

)

Definition at line 39 of file glshadersimple.cpp.

References m_colorLoc, m_fragmentShaderSourceColored, m_matrixLoc, m_program, and m_vertexShaderSourceSimple.

Referenced by GLScope::initializeGL(), and GLSpectrum::initializeGL().

{
    m_program = new QOpenGLShaderProgram;

    if (!m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, m_vertexShaderSourceSimple)) {
        qDebug() << "GLShaderSimple::initializeGL: error in vertex shader: " << m_program->log();
    }

    if (!m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, m_fragmentShaderSourceColored)) {
        qDebug() << "GLShaderSimple::initializeGL: error in fragment shader: " << m_program->log();
    }

    m_program->bindAttributeLocation("vertex", 0);

    if (!m_program->link()) {
        qDebug() << "GLShaderSimple::initializeGL: error linking shader: " << m_program->log();
    }

    m_program->bind();
    m_matrixLoc = m_program->uniformLocation("uMatrix");
    m_colorLoc = m_program->uniformLocation("uColour");
    m_program->release();
}

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Member Data Documentation

m_colorLoc

int GLShaderSimple::m_colorLoc

private

Definition at line 50 of file glshadersimple.h.

Referenced by draw(), and initializeGL().

m_fragmentShaderSourceColored

const QString GLShaderSimple::m_fragmentShaderSourceColored

staticprivate

Initial value:

= QString(
        "uniform mediump vec4 uColour;\n"
        "void main() {\n"
        "    gl_FragColor = uColour;\n"
        "}\n"
        )

Definition at line 52 of file glshadersimple.h.

Referenced by cleanup(), and initializeGL().

m_matrixLoc

int GLShaderSimple::m_matrixLoc

private

Definition at line 49 of file glshadersimple.h.

Referenced by draw(), and initializeGL().

m_program

QOpenGLShaderProgram* GLShaderSimple::m_program

private

Definition at line 48 of file glshadersimple.h.

Referenced by cleanup(), draw(), and initializeGL().

m_vertexShaderSourceSimple

const QString GLShaderSimple::m_vertexShaderSourceSimple

staticprivate

Initial value:

= QString(
        "uniform highp mat4 uMatrix;\n"
        "attribute highp vec4 vertex;\n"
        "void main() {\n"
        "    gl_Position = uMatrix * vertex;\n"
        "}\n"
        )

Definition at line 51 of file glshadersimple.h.

Referenced by cleanup(), and initializeGL().

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The documentation for this class was generated from the following files:

• sdrgui/gui/glshadersimple.h
• sdrgui/gui/glshadersimple.cpp