GLShaderTextured Class Reference

#include <glshadertextured.h>

Public Member Functions
	GLShaderTextured ()
	~GLShaderTextured ()
void	initializeGL ()
void	initTexture (const QImage &image, QOpenGLTexture::WrapMode wrapMode=QOpenGLTexture::Repeat)
void	subTexture (int xOffset, int yOffset, int width, int height, const void *pixels)
void	drawSurface (const QMatrix4x4 &transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices)
void	cleanup ()

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

Private Attributes
QOpenGLShaderProgram *	m_program
QOpenGLTexture *	m_texture
int	m_matrixLoc
int	m_textureLoc

Static Private Attributes
static const QString	m_vertexShaderSourceTextured
static const QString	m_fragmentShaderSourceTextured

Detailed Description

Definition at line 35 of file glshadertextured.h.

Constructor & Destructor Documentation

GLShaderTextured()

GLShaderTextured::GLShaderTextured

(

)

Definition at line 29 of file glshadertextured.cpp.

                                   :
    m_program(0),
    m_texture(0),
    m_matrixLoc(0),
    m_textureLoc(0)
{ }

~GLShaderTextured()

GLShaderTextured::~GLShaderTextured

(

)

Definition at line 36 of file glshadertextured.cpp.

References cleanup().

{
    cleanup();
}

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Member Function Documentation

cleanup()

void GLShaderTextured::cleanup

(

)

Definition at line 117 of file glshadertextured.cpp.

References m_fragmentShaderSourceTextured, m_program, m_texture, and m_vertexShaderSourceTextured.

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

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

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

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draw()

void GLShaderTextured::draw ( unsigned int  mode, const QMatrix4x4 &  transformMatrix, GLfloat *  textureCoords, GLfloat *  vertices, int  nbVertices  )

private

Definition at line 96 of file glshadertextured.cpp.

References m_matrixLoc, m_program, m_texture, and m_textureLoc.

Referenced by drawSurface().

{
    if (!m_texture) {
        qDebug("GLShaderTextured::draw: no texture defined. Doing nothing");
        return;
    }

    QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
    m_program->bind();
    m_program->setUniformValue(m_matrixLoc, transformMatrix);
    m_texture->bind();
    m_program->setUniformValue(m_textureLoc, 0); // Use texture unit 0 which magically contains our texture
    f->glEnableVertexAttribArray(0); // vertex
    f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices);
    f->glEnableVertexAttribArray(1); // texture coordinates
    f->glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, textureCoords);
    f->glDrawArrays(mode, 0, nbVertices);
    f->glDisableVertexAttribArray(0);
    m_program->release();
}

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drawSurface()

void GLShaderTextured::drawSurface	(	const QMatrix4x4 &	transformMatrix,
		GLfloat *	textureCoords,
		GLfloat *	vertices,
		int	nbVertices
	)

Definition at line 91 of file glshadertextured.cpp.

References draw().

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

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

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initializeGL()

void GLShaderTextured::initializeGL

(

)

Definition at line 41 of file glshadertextured.cpp.

References m_fragmentShaderSourceTextured, m_matrixLoc, m_program, m_textureLoc, and m_vertexShaderSourceTextured.

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

{
    m_program = new QOpenGLShaderProgram;

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

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

    m_program->bindAttributeLocation("vertex", 0);
    m_program->bindAttributeLocation("texCoord", 1);

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

    m_program->bind();
    m_matrixLoc = m_program->uniformLocation("uMatrix");
    m_textureLoc = m_program->uniformLocation("uTexture");
    m_program->release();
}

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initTexture()

void GLShaderTextured::initTexture	(	const QImage &	image,
		QOpenGLTexture::WrapMode	wrapMode = QOpenGLTexture::Repeat
	)

Definition at line 66 of file glshadertextured.cpp.

References m_texture.

Referenced by GLSpectrum::applyChanges(), GLScope::drawChannelOverlay(), GLScope::setHorizontalDisplays(), GLScope::setPolarDisplays(), GLScope::setUniqueDisplays(), and GLScope::setVerticalDisplays().

{
    if (m_texture) {
        delete m_texture;
    }

    m_texture = new QOpenGLTexture(image);

    m_texture->setMinificationFilter(QOpenGLTexture::Linear);
    m_texture->setMagnificationFilter(QOpenGLTexture::Linear);
    m_texture->setWrapMode(wrapMode);
}

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subTexture()

void GLShaderTextured::subTexture	(	int	xOffset,
		int	yOffset,
		int	width,
		int	height,
		const void *	pixels
	)

Definition at line 79 of file glshadertextured.cpp.

References m_texture.

Referenced by GLSpectrum::paintGL().

{
    if (!m_texture) {
        qDebug("GLShaderTextured::subTexture: no texture defined. Doing nothing");
        return;
    }

    QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
    m_texture->bind();
    f->glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}

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Member Data Documentation

m_fragmentShaderSourceTextured

const QString GLShaderTextured::m_fragmentShaderSourceTextured

staticprivate

Initial value:

= QString(
        "uniform lowp sampler2D uTexture;\n"
        "varying mediump vec2 texCoordVar;\n"
        "void main() {\n"
        "    gl_FragColor = texture2D(uTexture, texCoordVar);\n"
        "}\n"
        )

Definition at line 55 of file glshadertextured.h.

Referenced by cleanup(), and initializeGL().

m_matrixLoc

int GLShaderTextured::m_matrixLoc

private

Definition at line 52 of file glshadertextured.h.

Referenced by draw(), and initializeGL().

m_program

QOpenGLShaderProgram* GLShaderTextured::m_program

private

Definition at line 50 of file glshadertextured.h.

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

m_texture

QOpenGLTexture* GLShaderTextured::m_texture

private

Definition at line 51 of file glshadertextured.h.

Referenced by cleanup(), draw(), initTexture(), and subTexture().

m_textureLoc

int GLShaderTextured::m_textureLoc

private

Definition at line 53 of file glshadertextured.h.

Referenced by draw(), and initializeGL().

m_vertexShaderSourceTextured

const QString GLShaderTextured::m_vertexShaderSourceTextured

staticprivate

Initial value:

= QString(
        "uniform highp mat4 uMatrix;\n"
        "attribute highp vec4 vertex;\n"
        "attribute highp vec2 texCoord;\n"
        "varying mediump vec2 texCoordVar;\n"
        "void main() {\n"
        "    gl_Position = uMatrix * vertex;\n"
        "    texCoordVar = texCoord;\n"
        "}\n"
        )

Definition at line 54 of file glshadertextured.h.

Referenced by cleanup(), and initializeGL().

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

• sdrgui/gui/glshadertextured.h
• sdrgui/gui/glshadertextured.cpp