TVScreenAnalog with subsample shift shader added

plugins/channelrx/demodatv/atvdemod.h

@@ -87,7 +87,7 @@ public:
     }
 
 	void setScopeSink(BasebandSampleSink* scopeSink) { m_basebandSink->setScopeSink(scopeSink); }
-    void setTVScreen(TVScreen *tvScreen) { m_basebandSink->setTVScreen(tvScreen); }; //!< set by the GUI
+    void setTVScreen(TVScreenAnalog *tvScreen) { m_basebandSink->setTVScreen(tvScreen); }; //!< set by the GUI
     double getMagSq() const { return m_basebandSink->getMagSq(); } //!< Beware this is scaled to 2^30
     bool getBFOLocked() { return m_basebandSink->getBFOLocked(); }
     void setVideoTabIndex(int videoTabIndex) { m_basebandSink->setVideoTabIndex(videoTabIndex); }

plugins/channelrx/demodatv/atvdemodbaseband.h

@@ -64,7 +64,7 @@ public:
     int getChannelSampleRate() const;
     double getMagSq() const { return m_sink.getMagSq(); }
     void setScopeSink(BasebandSampleSink* scopeSink) { m_sink.setScopeSink(scopeSink); }
-    void setTVScreen(TVScreen *tvScreen) { m_sink.setTVScreen(tvScreen); }
+    void setTVScreen(TVScreenAnalog *tvScreen) { m_sink.setTVScreen(tvScreen); }
     bool getBFOLocked() { return m_sink.getBFOLocked(); }
     void setVideoTabIndex(int videoTabIndex) { m_sink.setVideoTabIndex(videoTabIndex); }
     void setBasebandSampleRate(int sampleRate); //!< To be used when supporting thread is stopped

plugins/channelrx/demodatv/atvdemodgui.cpp

@@ -242,8 +242,6 @@ ATVDemodGUI::ATVDemodGUI(PluginAPI* objPluginAPI, DeviceUISet *deviceUISet, Base
         m_tvSampleRate(48000)
 {
     ui->setupUi(this);
-    ui->screenTV->setColor(false);
-    ui->screenTV->setExtraColumns(true);
     setAttribute(Qt::WA_DeleteOnClose, true);
     connect(this, SIGNAL(widgetRolled(QWidget*,bool)), this, SLOT(onWidgetRolled(QWidget*,bool)));
 

plugins/channelrx/demodatv/atvdemodgui.ui

@@ -1138,7 +1138,7 @@
        <enum>QLayout::SetMinimumSize</enum>
       </property>
       <item>
-       <widget class="TVScreen" name="screenTV" native="true">
+       <widget class="TVScreenAnalog" name="screenTV" native="true">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
           <horstretch>0</horstretch>
@@ -1242,9 +1242,9 @@
    <container>1</container>
   </customwidget>
   <customwidget>
-   <class>TVScreen</class>
+   <class>TVScreenAnalog</class>
    <extends>QWidget</extends>
-   <header>gui/tvscreen.h</header>
+   <header>gui/tvscreenanalog.h</header>
    <container>1</container>
   </customwidget>
  </customwidgets>

plugins/channelrx/demodatv/atvdemodsink.cpp

@@ -359,7 +359,7 @@ void ATVDemodSink::applyStandard(int sampleRate, const ATVDemodSettings& setting
         // what is left in a line for the image
         m_interleaved        = true;
         m_numberOfVSyncLines = 4;
-        m_numberOfBlackLines = 58;
+        m_numberOfBlackLines = 59;
         m_firstVisibleLine   = 27;
         m_numberSamplesHSyncCrop = (int) (0.085f * lineDuration * sampleRate); // 8.5% of full line empirically
         break;

plugins/channelrx/demodatv/atvdemodsink.h

@@ -32,7 +32,7 @@
 #include "dsp/phasediscri.h"
 #include "audio/audiofifo.h"
 #include "util/movingaverage.h"
-#include "gui/tvscreen.h"
+#include "gui/tvscreenanalog.h"
 
 #include "atvdemodsettings.h"
 
@@ -44,7 +44,7 @@ public:
     virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
 
   	void setScopeSink(BasebandSampleSink* scopeSink) { m_scopeSink = scopeSink; }
-    void setTVScreen(TVScreen *tvScreen) { m_registeredTVScreen = tvScreen; } //!< set by the GUI
+    void setTVScreen(TVScreenAnalog *tvScreen) { m_registeredTVScreen = tvScreen; } //!< set by the GUI
     double getMagSq() const { return m_magSqAverage; } //!< Beware this is scaled to 2^30
     bool getBFOLocked();
     void setVideoTabIndex(int videoTabIndex) { m_videoTabIndex = videoTabIndex; }
@@ -107,7 +107,7 @@ private:
     SampleVector m_scopeSampleBuffer;
 
     //*************** ATV PARAMETERS  ***************
-    TVScreen *m_registeredTVScreen;
+    TVScreenAnalog *m_registeredTVScreen;
 
     //int m_intNumberSamplePerLine;
     int m_numberSamplesPerHTopNom;     //!< number of samples per horizontal synchronization pulse (pulse in ultra-black) - nominal value
@@ -198,7 +198,7 @@ private:
     inline void processSample(float& sample, int& sampleVideo)
     {
         // Filling pixel on the current line - reference index 0 at start of sync pulse
-        m_registeredTVScreen->setDataColor(m_sampleIndex - m_numberSamplesPerHSync, sampleVideo, sampleVideo, sampleVideo);
+        m_registeredTVScreen->setDataColor(m_sampleIndex - m_numberSamplesPerHSync, sampleVideo);
 
         if (m_settings.m_hSync)
         {
@@ -286,8 +286,9 @@ private:
                 m_hSyncShiftCount = 0;
                 m_hSyncErrorCount = 0;
             }
-            m_registeredTVScreen->renderImage(0,
+			m_registeredTVScreen->renderImage();
-                shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
+            //m_registeredTVScreen->renderImage(0,
+            //    shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
         }
 
         if (m_vSyncDetectSampleCount > m_vSyncDetectThreshold &&
@@ -319,8 +320,14 @@ private:
         int rowIndex = m_lineIndex - m_firstVisibleLine;
         if (m_interleaved)
             rowIndex = rowIndex * 2 - m_fieldIndex;
-        m_registeredTVScreen->selectRow(rowIndex);
+
-    }
+		// TODO: CHANGE
+		float shiftSamples = 0.0f;
+		if (m_hSyncShiftCount != 0)
+			shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
+		m_registeredTVScreen->selectRow(rowIndex,
+			shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
+	}
 
     // Vertical sync is obtained by skipping horizontal sync on the line that triggers vertical sync (new frame)
     inline void processEOLHSkip()
@@ -342,13 +349,17 @@ private:
                 m_hSyncShiftCount = 0;
                 m_hSyncErrorCount = 0;
             }
-            m_registeredTVScreen->renderImage(0,
+			m_registeredTVScreen->renderImage();
-                shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
+            //m_registeredTVScreen->renderImage(0,
+            //    shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
             m_lineIndex = 0;
             m_rowIndex = 0;
         }
 
-        m_registeredTVScreen->selectRow(m_rowIndex);
+		// TODO: CHANGE
+		float shiftSamples = m_hSyncShiftSum / m_hSyncShiftCount;
+		m_registeredTVScreen->selectRow(m_rowIndex,
+			shiftSamples < -1.0f ? -1.0f : (shiftSamples > 1.0f ? 1.0f : shiftSamples));
     }
 };
 

sdrgui/CMakeLists.txt

@@ -51,6 +51,7 @@ set(sdrgui_SOURCES
     gui/transverterbutton.cpp
     gui/transverterdialog.cpp
     gui/tvscreen.cpp
+    gui/tvscreenanalog.cpp
     gui/valuedial.cpp
     gui/valuedialz.cpp
 
@@ -123,6 +124,7 @@ set(sdrgui_HEADERS
     gui/transverterbutton.h
     gui/transverterdialog.h
     gui/tvscreen.h
+    gui/tvscreenanalog.h
     gui/valuedial.h
     gui/valuedialz.h
 

sdrgui/gui/glshadertvarray.cpp

@@ -39,13 +39,11 @@ GLShaderTVArray::GLShaderTVArray(bool blnColor) : m_blnColor(blnColor)
 {
 	m_blnAlphaBlend = false;
     m_blnAlphaReset = false;
-    m_blnExtraColumns = false;
     m_objProgram = 0;
     m_objImage = 0;
     m_objTexture = 0;
     m_intCols = 0;
     m_intRows = 0;
-    m_subsampleShift = 0.0f;
     m_blnInitialized = false;
     m_objCurrentRow = 0;
 
@@ -112,8 +110,7 @@ void GLShaderTVArray::InitializeGL(int intCols, int intRows)
     }
 
     //Image container
-    int cols = intCols + (m_blnExtraColumns ? 2 : 0);
+    m_objImage = new QImage(intCols, intRows, QImage::Format_RGBA8888);
-    m_objImage = new QImage(cols, intRows, QImage::Format_RGBA8888);
     m_objImage->fill(QColor(0, 0, 0));
 
     m_objTexture = new QOpenGLTexture(*m_objImage);
@@ -158,23 +155,11 @@ void GLShaderTVArray::RenderPixels(unsigned char *chrData)
 
     QMatrix4x4 objQMatrix;
 
-    float rectHalfWidth = 1.0f;
-    float sampleSize = 2.0f / m_intCols;
-    if (m_blnExtraColumns)
-        rectHalfWidth += sampleSize;
-    float xShift = sampleSize * m_subsampleShift;
-
     GLfloat arrVertices[] =
     // 2 3
     // 1 4
-    {
+    //1             2            3           3           4            1
-        -rectHalfWidth + xShift, -1.0f, // 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 };
-        -rectHalfWidth + xShift,  1.0f, // 2
-         rectHalfWidth + xShift,  1.0f, // 3
-         rectHalfWidth + xShift,  1.0f, // 3
-         rectHalfWidth + xShift, -1.0f, // 4
-        -rectHalfWidth + xShift, -1.0f  // 1
-    };
 
     GLfloat arrTextureCoords[] =
     // 1 4
@@ -242,9 +227,8 @@ void GLShaderTVArray::RenderPixels(unsigned char *chrData)
 
     m_objTexture->bind();
 
-    ptrF->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
+    ptrF->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_intCols, m_intRows, GL_RGBA,
-        m_intCols + (m_blnExtraColumns ? 2 : 0), m_intRows, GL_RGBA,
+            GL_UNSIGNED_BYTE, m_objImage->bits());
-        GL_UNSIGNED_BYTE, m_objImage->bits());
 
     ptrF->glEnableVertexAttribArray(0); // vertex
     ptrF->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, arrVertices);
@@ -334,11 +318,9 @@ bool GLShaderTVArray::SetDataColor(int intCol, QRgb objColor)
 
     if (m_blnInitialized)
     {
-        if ((intCol < m_intCols + m_blnExtraColumns) &&
+        if ((intCol < m_intCols) && (intCol >= 0) && (m_objCurrentRow != 0))
-            (intCol >= -m_blnExtraColumns) &&
-            (m_objCurrentRow != 0))
         {
-            m_objCurrentRow[intCol + m_blnExtraColumns] = objColor;
+            m_objCurrentRow[intCol] = objColor;
             blnRslt = true;
         }
     }

sdrgui/gui/glshadertvarray.h

@@ -43,8 +43,6 @@ public:
     GLShaderTVArray(bool blnColor);
     ~GLShaderTVArray();
 
-    void setExtraColumns(bool blnExtraColumns) { m_blnExtraColumns = blnExtraColumns; }
-    void setSubsampleShift(float subsampleShift) { m_subsampleShift = subsampleShift; }
     void setColor(bool blnColor) { m_blnColor = blnColor; }
     void setAlphaBlend(bool blnAlphaBlend) { m_blnAlphaBlend = blnAlphaBlend; }
     void setAlphaReset() { m_blnAlphaReset = true; }
@@ -73,7 +71,6 @@ protected:
 
     int m_intCols;
     int m_intRows;
-    float m_subsampleShift;
 
     QRgb * m_objCurrentRow;
 
@@ -81,7 +78,6 @@ protected:
     bool m_blnColor;
     bool m_blnAlphaBlend;
     bool m_blnAlphaReset;
-    bool m_blnExtraColumns;
 };
 
 #endif /* INCLUDE_GUI_GLTVSHADERARRAY_H_ */

sdrgui/gui/tvscreen.cpp

@@ -37,7 +37,6 @@ TVScreen::TVScreen(bool blnColor, QWidget* parent) :
     m_objTimer.start(40); // capped at 25 FPS
 
     m_chrLastData = NULL;
-    m_subsampleShift = 0.0;
     m_blnConfigChanged = false;
     m_blnDataChanged = false;
     m_blnGLContextInitialized = false;
@@ -59,11 +58,6 @@ void TVScreen::setColor(bool blnColor)
 	m_objGLShaderArray.setColor(blnColor);
 }
 
-void TVScreen::setExtraColumns(bool blnExtraColumns)
-{
-    m_objGLShaderArray.setExtraColumns(blnExtraColumns);
-}
-
 QRgb* TVScreen::getRowBuffer(int intRow)
 {
     if (!m_blnGLContextInitialized)
@@ -74,10 +68,9 @@ QRgb* TVScreen::getRowBuffer(int intRow)
     return m_objGLShaderArray.GetRowBuffer(intRow);
 }
 
-void TVScreen::renderImage(unsigned char * objData, float subsampleShift)
+void TVScreen::renderImage(unsigned char * objData)
 {
     m_chrLastData = objData;
-    m_subsampleShift = subsampleShift;
     m_blnDataChanged = true;
 }
 
@@ -184,7 +177,6 @@ void TVScreen::paintGL()
         m_intAskedRows = 0;
     }
 
-    m_objGLShaderArray.setSubsampleShift(m_subsampleShift);
     m_objGLShaderArray.RenderPixels(m_chrLastData);
 
     m_objMutex.unlock();

sdrgui/gui/tvscreen.h

@@ -46,10 +46,9 @@ public:
     virtual ~TVScreen();
 
     void setColor(bool blnColor);
-    void setExtraColumns(bool blnExtraColumns);
     void resizeTVScreen(int intCols, int intRows);
     void getSize(int& intCols, int& intRows) const;
-    void renderImage(unsigned char * objData, float subsampleShift = 0.0);
+    void renderImage(unsigned char * objData);
     QRgb* getRowBuffer(int intRow);
     void resetImage();
     void resetImage(int alpha);
@@ -74,7 +73,6 @@ private:
     bool m_blnGLContextInitialized;
     int m_intAskedCols;
     int m_intAskedRows;
-    float m_subsampleShift;
 
 
 	// state

sdrgui/gui/tvscreenanalog.cpp

@@ -0,0 +1,246 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2020 Vort                                                       //
+// Copyright (C) 2018 F4HKW                                                      //
+// for F4EXB / SDRAngel                                                          //
+//                                                                               //
+// OpenGL interface modernization.                                               //
+//                                                                               //
+// 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/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "tvscreenanalog.h"
+
+static const char* vertexShaderSource =
+"attribute highp vec4 vertex;\n"
+"attribute highp vec2 texCoord;\n"
+"varying highp vec2 texCoordVar;\n"
+"void main() {\n"
+"    gl_Position = vertex;\n"
+"    texCoordVar = texCoord;\n"
+"}\n";
+
+static const char* fragmentShaderSource =
+"uniform highp sampler2D uTexture1;\n"
+"uniform highp sampler2D uTexture2;\n"
+"uniform highp float imw;\n"
+"uniform highp float imh;\n"
+"uniform highp float tlw;\n"
+"uniform highp float tlh;\n"
+"varying highp vec2 texCoordVar;\n"
+"void main() {\n"
+"    float tlhw = 0.5 * tlw;"
+"    float tlhh = 0.5 * tlh;"
+"    float tys = (texCoordVar.y + tlhh) * imh;\n"
+"    float p1y = floor(tys) * tlh - tlhh;\n"
+"    float p3y = p1y + tlh;\n"
+"    float tshift1 = texture2D(uTexture2, vec2(0.0, p1y)).r;\n"
+"    float tshift3 = texture2D(uTexture2, vec2(0.0, p3y)).r;\n"
+"    float shift1 = (1.0 - tshift1 * 2.0) * tlw;\n"
+"    float shift3 = (1.0 - tshift3 * 2.0) * tlw;\n"
+"    float txs1 = (texCoordVar.x + shift1 + tlhw) * imw;\n"
+"    float txs3 = (texCoordVar.x + shift3 + tlhw) * imw;\n"
+"    float p1x = floor(txs1) * tlw - tlhw;\n"
+"    float p3x = floor(txs3) * tlw - tlhw;\n"
+"    float p2x = p1x + tlw;\n"
+"    float p4x = p3x + tlw;\n"
+"    float p1 = texture2D(uTexture1, vec2(p1x, p1y)).r;\n"
+"    float p2 = texture2D(uTexture1, vec2(p2x, p1y)).r;\n"
+"    float p3 = texture2D(uTexture1, vec2(p3x, p3y)).r;\n"
+"    float p4 = texture2D(uTexture1, vec2(p4x, p3y)).r;\n"
+"    float p12 = mix(p1, p2, fract(txs1));\n"
+"    float p34 = mix(p3, p4, fract(txs3));\n"
+"    float p = mix(p12, p34, fract(tys));\n"
+"    gl_FragColor = vec4(p);\n"
+"}\n";
+
+TVScreenAnalog::TVScreenAnalog(QWidget *parent)
+	: QGLWidget(parent)
+{
+	m_objCurrentRow = nullptr;
+	m_isDataChanged = false;
+	m_time = 0.0f;
+	m_cols = 1;
+	m_rows = 1;
+
+	connect(&m_objTimer, SIGNAL(timeout()), this, SLOT(tick()));
+	m_objTimer.start(40); // capped at 25 FPS
+}
+
+void TVScreenAnalog::cleanup()
+{
+	m_shader = nullptr;
+	m_imageTexture = nullptr;
+	m_objCurrentRow = nullptr;
+	m_lineShiftsTexture = nullptr;
+}
+
+void TVScreenAnalog::resizeTVScreen(int intCols, int intRows)
+{
+	qDebug("TVScreen::resizeTVScreen: cols: %d, rows: %d", intCols, intRows);
+	m_cols = intCols + 4;
+	m_rows = intRows;
+}
+
+void TVScreenAnalog::resizeGL(int intWidth, int intHeight)
+{
+	glViewport(0, 0, intWidth, intHeight);
+}
+
+void TVScreenAnalog::initializeGL()
+{
+	m_objMutex.lock();
+	initializeOpenGLFunctions();
+
+	m_shader = std::make_shared<QOpenGLShaderProgram>(this);
+	m_shader->addShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource);
+	m_shader->addShaderFromSourceCode(QOpenGLShader::Vertex, vertexShaderSource);
+	m_shader->link();
+
+	m_vertexAttribIndex = m_shader->attributeLocation("vertex");
+	m_texCoordAttribIndex = m_shader->attributeLocation("texCoord");
+	m_objTextureLoc1 = m_shader->uniformLocation("uTexture1");
+	m_objTextureLoc2 = m_shader->uniformLocation("uTexture2");
+	m_objImageWidthLoc = m_shader->uniformLocation("imw");
+	m_objImageHeightLoc = m_shader->uniformLocation("imh");
+	m_objTexelWidthLoc = m_shader->uniformLocation("tlw");
+	m_objTexelHeightLoc = m_shader->uniformLocation("tlh");
+	
+
+	initializeTextures();
+
+	connect(QOpenGLContext::currentContext(), &QOpenGLContext::aboutToBeDestroyed,
+		this, &TVScreenAnalog::cleanup); // TODO: when migrating to QOpenGLWidget
+
+	m_objMutex.unlock();
+}
+
+void TVScreenAnalog::initializeTextures()
+{
+	m_image = std::make_shared<QImage>(m_cols, m_rows, QImage::Format_ARGB32);
+	m_lineShifts = std::make_shared<QImage>(1, m_rows, QImage::Format_ARGB32);
+	m_image->fill(0);
+	m_lineShifts->fill(127);
+
+	m_imageTexture = std::make_shared<QOpenGLTexture>(*m_image, QOpenGLTexture::DontGenerateMipMaps);
+	m_lineShiftsTexture = std::make_shared<QOpenGLTexture>(*m_lineShifts, QOpenGLTexture::DontGenerateMipMaps);
+	m_imageTexture->setMinificationFilter(QOpenGLTexture::Nearest);
+	m_imageTexture->setMagnificationFilter(QOpenGLTexture::Nearest);
+	m_lineShiftsTexture->setMinificationFilter(QOpenGLTexture::Nearest);
+	m_lineShiftsTexture->setMagnificationFilter(QOpenGLTexture::Nearest);
+	m_imageTexture->setWrapMode(QOpenGLTexture::DirectionS, QOpenGLTexture::ClampToBorder);
+	m_imageTexture->setWrapMode(QOpenGLTexture::DirectionT, QOpenGLTexture::ClampToEdge);
+	m_lineShiftsTexture->setWrapMode(QOpenGLTexture::DirectionS, QOpenGLTexture::Repeat);
+	m_lineShiftsTexture->setWrapMode(QOpenGLTexture::DirectionT, QOpenGLTexture::ClampToEdge);
+}
+
+void TVScreenAnalog::renderImage()
+{
+	m_isDataChanged = true;
+}
+
+void TVScreenAnalog::tick()
+{
+	if (m_isDataChanged) {
+		update();
+	}
+}
+
+void TVScreenAnalog::selectRow(int intLine, float shift)
+{
+	if (!m_image || m_image->height() != m_rows)
+		return;
+
+	if ((intLine < m_rows) && (intLine >= 0))
+	{
+		m_objCurrentRow = (int*)m_image->scanLine(intLine);
+		m_lineShifts->setPixel(0, intLine, (1.0f + shift) * 127.5f);
+	}
+	else
+	{
+		m_objCurrentRow = nullptr;
+	}
+}
+
+void TVScreenAnalog::setDataColor(int intCol, int objColor)
+{
+	if ((intCol < m_cols - 2) &&
+		(intCol >= -2) &&
+		(m_objCurrentRow != nullptr))
+	{
+		m_objCurrentRow[intCol + 2] = objColor;
+	}
+}
+
+void TVScreenAnalog::paintGL()
+{
+	if (!m_objMutex.tryLock(2))
+		return;
+
+	m_isDataChanged = false;
+
+	if (m_image->width() != m_cols || m_image->height() != m_rows)
+		initializeTextures();
+
+	float imageWidth = m_image->width();
+	float imageHeight = m_image->height();
+	float texelWidth = 1.0f / imageWidth;
+	float texelHeight = 1.0f / imageHeight;
+
+	m_shader->bind();
+	m_shader->setUniformValue(m_objTextureLoc1, 0);
+	m_shader->setUniformValue(m_objTextureLoc2, 1);
+	m_shader->setUniformValue(m_objImageWidthLoc, imageWidth);
+	m_shader->setUniformValue(m_objImageHeightLoc, imageHeight);
+	m_shader->setUniformValue(m_objTexelWidthLoc, texelWidth);
+	m_shader->setUniformValue(m_objTexelHeightLoc, texelHeight);
+
+	glActiveTexture(GL_TEXTURE0);
+	m_imageTexture->bind();
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
+		m_image->width(), m_image->height(), GL_RGBA, GL_UNSIGNED_BYTE, m_image->constScanLine(0));
+
+	glActiveTexture(GL_TEXTURE1);
+	m_lineShiftsTexture->bind();
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
+		1, m_image->height(), GL_RGBA, GL_UNSIGNED_BYTE, m_lineShifts->constScanLine(0));
+
+	float rectHalfWidth = 1.0f + 4 * texelWidth;
+	GLfloat vertices[] =
+	{
+		-rectHalfWidth, -1.0f,
+		-rectHalfWidth,  1.0f,
+		 rectHalfWidth,  1.0f,
+		 rectHalfWidth, -1.0f
+	};
+
+	static const GLfloat arrTextureCoords[] =
+	{
+		0.0f, 1.0f,
+		0.0f, 0.0f,
+		1.0f, 0.0f,
+		1.0f, 1.0f
+	};
+
+	glVertexAttribPointer(m_vertexAttribIndex, 2, GL_FLOAT, GL_FALSE, 0, vertices);
+	glEnableVertexAttribArray(m_vertexAttribIndex);
+	glVertexAttribPointer(m_texCoordAttribIndex, 2, GL_FLOAT, GL_FALSE, 0, arrTextureCoords);
+	glEnableVertexAttribArray(m_texCoordAttribIndex);
+	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+	glDisableVertexAttribArray(m_vertexAttribIndex);
+	glDisableVertexAttribArray(m_texCoordAttribIndex);
+
+	m_shader->release();
+
+	m_objMutex.unlock();
+}

sdrgui/gui/tvscreenanalog.h

@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2020 Vort                                                       //
+// Copyright (C) 2018 F4HKW                                                      //
+// for F4EXB / SDRAngel                                                          //
+//                                                                               //
+// OpenGL interface modernization.                                               //
+// See: http://doc.qt.io/qt-5/qopenglshaderprogram.html                          //
+//                                                                               //
+// 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_TVSCREENANALOG_H
+#define INCLUDE_TVSCREENANALOG_H
+
+#include "export.h"
+
+#include <memory>
+
+#include <QImage>
+#include <QMutex>
+#include <QTimer>
+#include <QGLWidget>
+#include <QOpenGLTexture>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+
+class SDRGUI_API TVScreenAnalog : public QGLWidget, protected QOpenGLFunctions
+{
+	Q_OBJECT
+
+	QTimer m_objTimer;
+	QMutex m_objMutex;
+
+	bool m_isDataChanged;
+
+	int m_objTextureLoc1;
+	int m_objTextureLoc2;
+	int m_objImageWidthLoc;
+	int m_objImageHeightLoc;
+	int m_objTexelWidthLoc;
+	int m_objTexelHeightLoc;
+	int m_vertexAttribIndex;
+	int m_texCoordAttribIndex;
+	std::shared_ptr<QOpenGLShaderProgram> m_shader;
+
+	float m_time;
+
+	int m_cols;
+	int m_rows;
+
+	int* m_objCurrentRow;
+
+	std::shared_ptr<QImage> m_image;
+	std::shared_ptr<QImage> m_lineShifts;
+	std::shared_ptr<QOpenGLTexture> m_imageTexture;
+	std::shared_ptr<QOpenGLTexture> m_lineShiftsTexture;
+
+public:
+	TVScreenAnalog(QWidget *parent);
+
+	void resizeTVScreen(int intCols, int intRows);
+	void selectRow(int intLine, float shift);
+	void setDataColor(int intCol, int objColor);
+	void renderImage();
+
+private:
+	void initializeTextures();
+	void initializeGL() override;
+	void paintGL() override;
+	void resizeGL(int width, int height);
+
+private slots:
+	void cleanup();
+	void tick();
+};
+
+#endif // INCLUDE_TVSCREENANALOG_H