GLShaderTVArray Class Reference

#include <glshadertvarray.h>

Public Member Functions
	GLShaderTVArray (bool blnColor)
	~GLShaderTVArray ()
void	setColor (bool blnColor)
void	setAlphaBlend (bool blnAlphaBlend)
void	setAlphaReset ()
void	InitializeGL (int intCols, int intRows)
void	Cleanup ()
QRgb *	GetRowBuffer (int intRow)
void	RenderPixels (unsigned char *chrData)
void	ResetPixels ()
void	ResetPixels (int alpha)
bool	SelectRow (int intLine)
bool	SetDataColor (int intCol, QRgb objColor)

Protected Attributes
QOpenGLShaderProgram *	m_objProgram
int	m_objMatrixLoc
int	m_objTextureLoc
QImage *	m_objImage =NULL
QOpenGLTexture *	m_objTexture =NULL
int	m_intCols
int	m_intRows
QRgb *	m_objCurrentRow
bool	m_blnInitialized
bool	m_blnColor
bool	m_blnAlphaBlend
bool	m_blnAlphaReset

Static Protected Attributes
static const QString	m_strVertexShaderSourceArray
static const QString	m_strFragmentShaderSourceColored

Detailed Description

Definition at line 40 of file glshadertvarray.h.

Constructor & Destructor Documentation

GLShaderTVArray()

GLShaderTVArray::GLShaderTVArray

(

bool

blnColor

)

Definition at line 38 of file glshadertvarray.cpp.

References m_blnAlphaBlend, m_blnAlphaReset, m_blnInitialized, m_intCols, m_intRows, m_objCurrentRow, m_objImage, m_objMatrixLoc, m_objProgram, m_objTexture, and m_objTextureLoc.

                                              : m_blnColor(blnColor)
{
    m_blnAlphaBlend = false;
    m_blnAlphaReset = false;
    m_objProgram = 0;
    m_objImage = 0;
    m_objTexture = 0;
    m_intCols = 0;
    m_intRows = 0;
    m_blnInitialized = false;
    m_objCurrentRow = 0;

    m_objTextureLoc = 0;
    m_objMatrixLoc = 0;
}

~GLShaderTVArray()

GLShaderTVArray::~GLShaderTVArray

(

)

Definition at line 54 of file glshadertvarray.cpp.

References Cleanup().

{
    Cleanup();
}

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Member Function Documentation

Cleanup()

void GLShaderTVArray::Cleanup

(

)

Definition at line 267 of file glshadertvarray.cpp.

References m_blnInitialized, m_intCols, m_intRows, m_objCurrentRow, m_objImage, m_objProgram, and m_objTexture.

Referenced by TVScreen::cleanup(), setAlphaReset(), and ~GLShaderTVArray().

{
    m_blnInitialized = false;

    m_intCols = 0;
    m_intRows = 0;

    m_objCurrentRow = 0;

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

    if (m_objTexture != 0)
    {
        delete m_objTexture;
        m_objTexture = 0;
    }

    if (m_objImage != 0)
    {
        delete m_objImage;
        m_objImage = 0;
    }
}

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GetRowBuffer()

QRgb * GLShaderTVArray::GetRowBuffer

(

int

intRow

)

Definition at line 129 of file glshadertvarray.cpp.

References m_blnInitialized, m_intRows, and m_objImage.

Referenced by TVScreen::getRowBuffer(), and setAlphaReset().

{
    if (!m_blnInitialized)
    {
        return 0;
    }

    if (m_objImage == 0)
    {
        return 0;
    }

    if (intRow > m_intRows)
    {
        return 0;
    }

    return (QRgb *) m_objImage->scanLine(intRow);
}

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InitializeGL()

void GLShaderTVArray::InitializeGL	(	int	intCols,
		int	intRows
	)

Definition at line 59 of file glshadertvarray.cpp.

References m_blnInitialized, m_intCols, m_intRows, m_objCurrentRow, m_objImage, m_objMatrixLoc, m_objProgram, m_objTexture, m_objTextureLoc, m_strFragmentShaderSourceColored, and m_strVertexShaderSourceArray.

Referenced by TVScreen::paintGL(), and setAlphaReset().

{
    QMatrix4x4 objQMatrix;

    m_blnInitialized = false;

    m_intCols = 0;
    m_intRows = 0;

    m_objCurrentRow = 0;

    if (m_objProgram == 0)
    {
        m_objProgram = new QOpenGLShaderProgram();

        if (!m_objProgram->addShaderFromSourceCode(QOpenGLShader::Vertex,
                m_strVertexShaderSourceArray))
        {
            qDebug() << "GLShaderArray::initializeGL: error in vertex shader: "
                    << m_objProgram->log();
        }

        if (!m_objProgram->addShaderFromSourceCode(QOpenGLShader::Fragment,
                m_strFragmentShaderSourceColored))
        {
            qDebug()
                    << "GLShaderArray::initializeGL: error in fragment shader: "
                    << m_objProgram->log();
        }

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

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

        m_objProgram->bind();
        m_objProgram->setUniformValue(m_objMatrixLoc, objQMatrix);
        m_objProgram->setUniformValue(m_objTextureLoc, 0);
        m_objProgram->release();
    }

    m_objMatrixLoc = m_objProgram->uniformLocation("uMatrix");
    m_objTextureLoc = m_objProgram->uniformLocation("uTexture");

    if (m_objTexture != 0)
    {
        delete m_objTexture;
        m_objTexture = 0;
    }

    //Image container
    m_objImage = new QImage(intCols, intRows, QImage::Format_RGBA8888);
    m_objImage->fill(QColor(0, 0, 0));

    m_objTexture = new QOpenGLTexture(*m_objImage);
    //m_objTexture->setFormat(QOpenGLTexture::RGBA8_UNorm); avoids OpenGL warning and in fact is useless
    m_objTexture->setMinificationFilter(QOpenGLTexture::Linear);
    m_objTexture->setMagnificationFilter(QOpenGLTexture::Linear);
    m_objTexture->setWrapMode(QOpenGLTexture::ClampToEdge);

    m_intCols = intCols;
    m_intRows = intRows;

    m_blnInitialized = true;

}

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RenderPixels()

void GLShaderTVArray::RenderPixels

(

unsigned char *

chrData

)

Definition at line 149 of file glshadertvarray.cpp.

References m_blnAlphaBlend, m_blnAlphaReset, m_blnColor, m_blnInitialized, m_intCols, m_intRows, m_objImage, m_objMatrixLoc, m_objProgram, m_objTexture, and m_objTextureLoc.

Referenced by TVScreen::paintGL(), and setAlphaReset().

{
    QOpenGLFunctions *ptrF;
    int intI;
    int intJ;
    int intNbVertices = 6;

    QMatrix4x4 objQMatrix;

    GLfloat arrVertices[] =
    // 2 3
    // 1 4
    //1             2            3           3           4            1
    { -1.0f, -1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, -1.0f, -1.0f };

    GLfloat arrTextureCoords[] =
    // 1 4
    // 2 3
    //1           2           3           3           4           1
    { 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f };

    QRgb *ptrLine;
    int intVal;

    if (!m_blnInitialized)
    {
        return;
    }

    if (m_objImage == 0)
    {
        return;
    }

    if (chrData != 0)
    {
        for (intJ = 0; intJ < m_intRows; intJ++)
        {
            ptrLine = (QRgb *) m_objImage->scanLine(intJ);

            for (intI = 0; intI < m_intCols; intI++)
            {
                if (m_blnColor)
                {
                    *ptrLine = qRgb((int) (*(chrData+2)), (int) (*(chrData+1)), (int) (*chrData));
                    chrData+=3;
                }
                else
                {
                    intVal = (int) (*chrData);
                    *ptrLine = qRgb(intVal, intVal, intVal);
                    chrData++;
                }

                ptrLine++;
            }
        }
    }

    //Affichage
    ptrF = QOpenGLContext::currentContext()->functions();

    m_objProgram->bind();

    m_objProgram->setUniformValue(m_objMatrixLoc, objQMatrix);
    m_objProgram->setUniformValue(m_objTextureLoc, 0);

    if (m_blnAlphaReset) {
        ptrF->glClear(GL_COLOR_BUFFER_BIT);
        m_blnAlphaReset = false;
    }

    if (m_blnAlphaBlend) {
        ptrF->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
        ptrF->glEnable(GL_BLEND);
    } else {
        ptrF->glDisable(GL_BLEND);
    }

    m_objTexture->bind();

    ptrF->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_intCols, m_intRows, GL_RGBA,
            GL_UNSIGNED_BYTE, m_objImage->bits());

    ptrF->glEnableVertexAttribArray(0); // vertex
    ptrF->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, arrVertices);

    ptrF->glEnableVertexAttribArray(1); // texture coordinates
    ptrF->glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, arrTextureCoords);

    ptrF->glDrawArrays(GL_TRIANGLES, 0, intNbVertices);

    //cleanup
    ptrF->glDisableVertexAttribArray(0);
    ptrF->glDisableVertexAttribArray(1);

    //*********************//

    m_objTexture->release();
    m_objProgram->release();
}

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ResetPixels() [1/2]

void GLShaderTVArray::ResetPixels

(

)

Definition at line 251 of file glshadertvarray.cpp.

References m_objImage.

Referenced by TVScreen::resetImage(), and setAlphaReset().

{
    if (m_objImage != 0)
    {
        m_objImage->fill(0);
    }
}

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ResetPixels() [2/2]

void GLShaderTVArray::ResetPixels

(

int

alpha

)

Definition at line 259 of file glshadertvarray.cpp.

References m_objImage.

{
    if (m_objImage != 0)
    {
        m_objImage->fill(qRgba(0, 0, 0, alpha));
    }
}

SelectRow()

bool GLShaderTVArray::SelectRow

(

int

intLine

)

Definition at line 295 of file glshadertvarray.cpp.

References m_blnInitialized, m_intRows, m_objCurrentRow, and m_objImage.

Referenced by TVScreen::selectRow(), and setAlphaReset().

{
    bool blnRslt = false;

    if (m_blnInitialized)
    {
        if ((intLine < m_intRows) && (intLine >= 0))
        {
            m_objCurrentRow = (QRgb *) m_objImage->scanLine(intLine);
            blnRslt = true;
        }
        else
        {
            m_objCurrentRow = 0;
        }
    }

    return blnRslt;
}

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setAlphaBlend()

void GLShaderTVArray::setAlphaBlend ( bool  blnAlphaBlend )

inline

Definition at line 47 of file glshadertvarray.h.

References m_blnAlphaBlend.

{ m_blnAlphaBlend = blnAlphaBlend; }

setAlphaReset()

void GLShaderTVArray::setAlphaReset ( )

inline

Definition at line 48 of file glshadertvarray.h.

References Cleanup(), GetRowBuffer(), InitializeGL(), m_blnAlphaReset, RenderPixels(), ResetPixels(), SelectRow(), and SetDataColor().

{ m_blnAlphaReset = true; }

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setColor()

void GLShaderTVArray::setColor ( bool  blnColor )

inline

Definition at line 46 of file glshadertvarray.h.

References m_blnColor.

Referenced by TVScreen::setColor().

{ m_blnColor = blnColor; }

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SetDataColor()

bool GLShaderTVArray::SetDataColor	(	int	intCol,
		QRgb	objColor
	)

Definition at line 315 of file glshadertvarray.cpp.

References m_blnInitialized, m_intCols, and m_objCurrentRow.

Referenced by setAlphaReset(), and TVScreen::setDataColor().

{
    bool blnRslt = false;

    if (m_blnInitialized)
    {
        if ((intCol < m_intCols) && (intCol >= 0) && (m_objCurrentRow != 0))
        {
            m_objCurrentRow[intCol] = objColor;
            blnRslt = true;
        }
    }

    return blnRslt;
}

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Member Data Documentation

m_blnAlphaBlend

bool GLShaderTVArray::m_blnAlphaBlend

protected

Definition at line 79 of file glshadertvarray.h.

Referenced by GLShaderTVArray(), RenderPixels(), and setAlphaBlend().

m_blnAlphaReset

bool GLShaderTVArray::m_blnAlphaReset

protected

Definition at line 80 of file glshadertvarray.h.

Referenced by GLShaderTVArray(), RenderPixels(), and setAlphaReset().

m_blnColor

bool GLShaderTVArray::m_blnColor

protected

Definition at line 78 of file glshadertvarray.h.

Referenced by RenderPixels(), and setColor().

m_blnInitialized

bool GLShaderTVArray::m_blnInitialized

protected

Definition at line 77 of file glshadertvarray.h.

Referenced by Cleanup(), GetRowBuffer(), GLShaderTVArray(), InitializeGL(), RenderPixels(), SelectRow(), and SetDataColor().

m_intCols

int GLShaderTVArray::m_intCols

protected

Definition at line 72 of file glshadertvarray.h.

Referenced by Cleanup(), GLShaderTVArray(), InitializeGL(), RenderPixels(), and SetDataColor().

m_intRows

int GLShaderTVArray::m_intRows

protected

Definition at line 73 of file glshadertvarray.h.

Referenced by Cleanup(), GetRowBuffer(), GLShaderTVArray(), InitializeGL(), RenderPixels(), and SelectRow().

m_objCurrentRow

QRgb* GLShaderTVArray::m_objCurrentRow

protected

Definition at line 75 of file glshadertvarray.h.

Referenced by Cleanup(), GLShaderTVArray(), InitializeGL(), SelectRow(), and SetDataColor().

m_objImage

QImage* GLShaderTVArray::m_objImage =NULL

protected

Definition at line 69 of file glshadertvarray.h.

Referenced by Cleanup(), GetRowBuffer(), GLShaderTVArray(), InitializeGL(), RenderPixels(), ResetPixels(), and SelectRow().

m_objMatrixLoc

int GLShaderTVArray::m_objMatrixLoc

protected

Definition at line 63 of file glshadertvarray.h.

Referenced by GLShaderTVArray(), InitializeGL(), and RenderPixels().

m_objProgram

QOpenGLShaderProgram* GLShaderTVArray::m_objProgram

protected

Definition at line 62 of file glshadertvarray.h.

Referenced by Cleanup(), GLShaderTVArray(), InitializeGL(), and RenderPixels().

m_objTexture

QOpenGLTexture* GLShaderTVArray::m_objTexture =NULL

protected

Definition at line 70 of file glshadertvarray.h.

Referenced by Cleanup(), GLShaderTVArray(), InitializeGL(), and RenderPixels().

m_objTextureLoc

int GLShaderTVArray::m_objTextureLoc

protected

Definition at line 64 of file glshadertvarray.h.

Referenced by GLShaderTVArray(), InitializeGL(), and RenderPixels().

m_strFragmentShaderSourceColored

const QString GLShaderTVArray::m_strFragmentShaderSourceColored

staticprotected

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 67 of file glshadertvarray.h.

Referenced by InitializeGL().

m_strVertexShaderSourceArray

const QString GLShaderTVArray::m_strVertexShaderSourceArray

staticprotected

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 66 of file glshadertvarray.h.

Referenced by InitializeGL().

---

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

• sdrgui/gui/glshadertvarray.h
• sdrgui/gui/glshadertvarray.cpp