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https://github.com/f4exb/sdrangel.git
synced 2024-09-27 15:26:33 -04:00
OpenGL modernization: draw the spectrum line in the new way
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f4exb
parent
22d9e77974
commit
add5a382f3
@ -150,12 +150,13 @@ private:
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int m_histogramLateHoldoff;
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int m_histogramStroke;
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QRectF m_glHistogramRect;
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QRectF m_glHistogramRect2;
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bool m_displayHistogram;
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bool m_displayChanged;
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QOpenGLVertexArrayObject m_vao;
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QOpenGLBuffer m_vbo;
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//QOpenGLVertexArrayObject m_vao; don't know what to do with this shit
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//QOpenGLBuffer m_vbo;
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QOpenGLShaderProgram *m_program;
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int m_matrixLoc;
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int m_colorLoc;
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@ -21,6 +21,7 @@
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#include <QMouseEvent>
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#include <QOpenGLShaderProgram>
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#include <QOpenGLFunctions>
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#include "gui/glspectrum.h"
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#include "gui/glshadersources.h"
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@ -113,12 +114,6 @@ GLSpectrum::GLSpectrum(QWidget* parent) :
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m_frequencyScale.setFont(font());
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m_frequencyScale.setOrientation(Qt::Horizontal);
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m_vao.create();
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QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
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m_vbo.create();
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m_vbo.bind();
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// TODO: allocate VBO
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connect(&m_timer, SIGNAL(timeout()), this, SLOT(tick()));
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m_timer.start(50);
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}
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@ -163,10 +158,6 @@ GLSpectrum::~GLSpectrum()
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deleteTexture(m_frequencyTexture);
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m_frequencyTextureAllocated = false;
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}
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makeCurrent(); // TODO: move to cleanup() wnem inheriting from QOpenGLWidget
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m_vbo.destroy();
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doneCurrent();
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}
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void GLSpectrum::setCenterFrequency(quint64 frequency)
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@ -497,7 +488,24 @@ void GLSpectrum::updateHistogram(const std::vector<Real>& spectrum)
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void GLSpectrum::initializeGL()
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{
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//connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &GLSpectrum::cleanup); // TODO: when migrating to QOpenGLWidget
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QOpenGLContext *glCurrentContext = QOpenGLContext::currentContext();
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if (glCurrentContext) {
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if (QOpenGLContext::currentContext()->isValid()) {
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qDebug() << "GLSpectrum::initializeGL: context:"
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<< " major: " << (QOpenGLContext::currentContext()->format()).majorVersion()
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<< " minor: " << (QOpenGLContext::currentContext()->format()).minorVersion()
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<< " ES: " << (QOpenGLContext::currentContext()->isOpenGLES() ? "yes" : "no");
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}
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else {
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qDebug() << "GLSpectrum::initializeGL: current context is invalid";
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}
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} else {
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qCritical() << "GLSpectrum::initializeGL: no current context";
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return;
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}
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connect(glCurrentContext, &QOpenGLContext::aboutToBeDestroyed, this, &GLSpectrum::cleanup); // TODO: when migrating to QOpenGLWidget
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glDisable(GL_DEPTH_TEST);
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m_program = new QOpenGLShaderProgram;
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@ -507,7 +515,7 @@ void GLSpectrum::initializeGL()
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m_program->link();
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m_program->bind();
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m_matrixLoc = m_program->uniformLocation("uMatrix");
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m_colorLoc = m_program->uniformLocation("uColor");
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m_colorLoc = m_program->uniformLocation("uColour");
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m_program->release();
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}
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@ -1177,29 +1185,17 @@ void GLSpectrum::paintGL()
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// paint current spectrum line on top of histogram
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if ((m_displayCurrent) && m_currentSpectrum) {
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#ifdef GL_DEPRECATED
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glPushMatrix();
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glTranslatef(m_glHistogramRect.x(), m_glHistogramRect.y(), 0);
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glScalef(m_glHistogramRect.width() / (float)(m_fftSize - 1), -m_glHistogramRect.height() / m_powerRange, 1);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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//glEnable(GL_LINE_SMOOTH);
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glLineWidth(1.0f);
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glColor4f(1.0f, 1.0f, 0.25f, m_displayTraceIntensity / 100.0); // intense yellow
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Real bottom = -m_powerRange;
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#ifdef GL_DEPRECATED
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glBegin(GL_LINE_STRIP);
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for(int i = 0; i < m_fftSize; i++) {
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Real v = (*m_currentSpectrum)[i] - m_referenceLevel;
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if(v > 0)
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v = 0;
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else if(v < bottom)
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v = bottom;
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glVertex2f(i, v);
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}
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glEnd();
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#else
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{
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GLfloat q3[2*m_fftSize];
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@ -1212,21 +1208,61 @@ void GLSpectrum::paintGL()
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q3[2*i] = (Real) i;
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q3[2*i+1] = v;
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}
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#ifdef GL_ANDROID
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glEnableVertexAttribArray(GL_VERTEX_ARRAY);
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glVertexAttribPointer(GL_VERTEX_ARRAY, 2, GL_FLOAT, GL_FALSE, 0, q3);
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glDrawArrays(GL_LINE_STRIP, 0, m_fftSize);
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glDisableVertexAttribArray(GL_VERTEX_ARRAY);
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#else
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, q3);
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glDrawArrays(GL_LINE_STRIP, 0, m_fftSize);
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glDisableClientState(GL_VERTEX_ARRAY);
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#endif
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}
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/*
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glBegin(GL_LINE_STRIP);
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for(int i = 0; i < m_fftSize; i++) {
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Real v = (*m_currentSpectrum)[i] - m_referenceLevel;
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if(v > 0)
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v = 0;
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else if(v < bottom)
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v = bottom;
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glVertex2f(i, v);
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}
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glEnd();*/
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glPopMatrix();
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#else
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{
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Real bottom = -m_powerRange;
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GLfloat q3[2*m_fftSize];
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for(int i = 0; i < m_fftSize; i++) {
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Real v = (*m_currentSpectrum)[i] - m_referenceLevel;
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if(v > 0)
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v = 0;
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else if(v < bottom)
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v = bottom;
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q3[2*i] = (Real) i;
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q3[2*i+1] = v;
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}
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QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
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m_program->bind();
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QVector4D color(1.0f, 1.0f, 0.25f, (float) m_displayTraceIntensity / 100.0f);
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QMatrix4x4 tsMatrix;
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tsMatrix.setToIdentity();
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//qDebug("GLSpectrum::paintGL: %f %f %f %f", m_glHistogramRect.x(), m_glHistogramRect.y(), m_glHistogramRect.width(), m_glHistogramRect.height());
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//tsMatrix.translate(m_glHistogramRect.x(), m_glHistogramRect.y(), 0);
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tsMatrix.translate(m_glHistogramRect2.x(), m_glHistogramRect2.y(), 0);
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tsMatrix.scale((2.0f * m_glHistogramRect.width()) / (float)(m_fftSize - 1), (2.0f * m_glHistogramRect.height()) / m_powerRange, 1);
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m_program->setUniformValue(m_matrixLoc, tsMatrix);
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m_program->setUniformValue(m_colorLoc, color);
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f->glEnable(GL_BLEND);
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f->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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f->glLineWidth(1.0f);
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f->glEnableVertexAttribArray(0); // vertex
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f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, q3);
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f->glDrawArrays(GL_LINE_STRIP, 0, m_fftSize);
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f->glDisableVertexAttribArray(0);
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m_program->release();
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//QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
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}
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#endif
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//glDisable(GL_LINE_SMOOTH);
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glPopMatrix();
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}
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// paint waterfall grid
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@ -1550,6 +1586,16 @@ void GLSpectrum::applyChanges()
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(float)histogramHeight / (float)height()
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);
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float width2 = (float) width() / 2.0f;
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float height2 = (float) height() / 2.0f;
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m_glHistogramRect2 = QRectF(
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-1.0f + ((float)leftMargin / width2),
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1.0f - ((float)histogramTop / height2),
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1.0f - ((float)(width2 - leftMargin - rightMargin) / width2),
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1.0f - ((float)histogramHeight / height2)
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);
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m_frequencyScaleRect = QRect(
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0,
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frequencyScaleTop,
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@ -2073,6 +2119,5 @@ void GLSpectrum::cleanup()
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delete m_program;
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m_program = 0;
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}
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m_program = 0;
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doneCurrent();
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}
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