bool GLSLWaveformRendererSignal::loadTexture() {
TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
ConstWaveformPointer waveform;
int dataSize = 0;
const WaveformData* data = NULL;
if (trackInfo) {
waveform = trackInfo->getWaveform();
if (waveform) {
dataSize = waveform->getDataSize();
if (dataSize > 1) {
data = waveform->data();
}
}
}
glEnable(GL_TEXTURE_2D);
if (m_textureId == 0) {
glGenTextures(1, &m_textureId);
int error = glGetError();
if (error)
qDebug() << "GLSLWaveformRendererSignal::loadTexture - m_textureId" << m_textureId << "error" << error;
}
glBindTexture(GL_TEXTURE_2D, m_textureId);
int error = glGetError();
if (error)
qDebug() << "GLSLWaveformRendererSignal::loadTexture - bind error" << error;
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
if (waveform != NULL && data != NULL) {
// Waveform ensures that getTextureSize is a multiple of
// getTextureStride so there is no rounding here.
int textureWidth = waveform->getTextureStride();
int textureHeigth = waveform->getTextureSize() / waveform->getTextureStride();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeigth, 0,
GL_RGBA, GL_UNSIGNED_BYTE, data);
int error = glGetError();
if (error)
qDebug() << "GLSLWaveformRendererSignal::loadTexture - glTexImage2D error" << error;
} else {
glDeleteTextures(1,&m_textureId);
m_textureId = 0;
}
glDisable(GL_TEXTURE_2D);
return true;
}
void GLSLWaveformRendererSignal::draw(QPainter* painter, QPaintEvent* /*event*/) {
if (!m_frameBuffersValid || !m_shadersValid) {
return;
}
TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
if (!trackInfo) {
return;
}
ConstWaveformPointer waveform = trackInfo->getWaveform();
if (waveform.isNull()) {
return;
}
int dataSize = waveform->getDataSize();
if (dataSize <= 1) {
return;
}
const WaveformData* data = waveform->data();
if (data == NULL) {
return;
}
// save the GL state set for QPainter
painter->beginNativePainting();
//NOTE: (vRince) completion can change during loadTexture
//do not remove currenCompletion temp variable !
const int currentCompletion = waveform->getCompletion();
if (m_loadedWaveform < currentCompletion) {
loadTexture();
m_loadedWaveform = currentCompletion;
}
// Per-band gain from the EQ knobs.
float lowGain(1.0), midGain(1.0), highGain(1.0), allGain(1.0);
getGains(&allGain, &lowGain, &midGain, &highGain);
double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize/2.0;
double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize/2.0;
// const int firstIndex = int(firstVisualIndex+0.5);
// firstVisualIndex = firstIndex - firstIndex%2;
// const int lastIndex = int(lastVisualIndex+0.5);
// lastVisualIndex = lastIndex + lastIndex%2;
//qDebug() << "GAIN" << allGain << lowGain << midGain << highGain;
//paint into frame buffer
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(firstVisualIndex, lastVisualIndex, -1.0, 1.0, -10.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glTranslatef(.0f,.0f,.0f);
m_frameShaderProgram->bind();
glViewport(0, 0, m_framebuffer->width(), m_framebuffer->height());
m_frameShaderProgram->setUniformValue("framebufferSize", QVector2D(
m_framebuffer->width(), m_framebuffer->height()));
m_frameShaderProgram->setUniformValue("waveformLength", dataSize);
m_frameShaderProgram->setUniformValue("textureSize", waveform->getTextureSize());
m_frameShaderProgram->setUniformValue("textureStride", waveform->getTextureStride());
m_frameShaderProgram->setUniformValue("firstVisualIndex", (float)firstVisualIndex);
m_frameShaderProgram->setUniformValue("lastVisualIndex", (float)lastVisualIndex);
m_frameShaderProgram->setUniformValue("allGain", allGain);
m_frameShaderProgram->setUniformValue("lowGain", lowGain);
m_frameShaderProgram->setUniformValue("midGain", midGain);
m_frameShaderProgram->setUniformValue("highGain", highGain);
m_frameShaderProgram->setUniformValue("axesColor", QVector4D(m_axesColor_r, m_axesColor_g,
m_axesColor_b, m_axesColor_a));
QVector4D lowColor = m_rgbShader ?
QVector4D(m_rgbLowColor_r, m_rgbLowColor_g, m_rgbLowColor_b, 1.0) :
QVector4D(m_lowColor_r, m_lowColor_g, m_lowColor_b, 1.0);
QVector4D midColor = m_rgbShader ?
QVector4D(m_rgbMidColor_r, m_rgbMidColor_g, m_rgbMidColor_b, 1.0) :
QVector4D(m_midColor_r, m_midColor_g, m_midColor_b, 1.0);
QVector4D highColor = m_rgbShader ?
QVector4D(m_rgbHighColor_r, m_rgbHighColor_g, m_rgbHighColor_b, 1.0) :
QVector4D(m_highColor_r, m_highColor_g, m_highColor_b, 1.0);
m_frameShaderProgram->setUniformValue("lowColor", lowColor);
m_frameShaderProgram->setUniformValue("midColor", midColor);
m_frameShaderProgram->setUniformValue("highColor", highColor);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, m_textureId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
m_framebuffer->bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//glCallList(m_unitQuadListId);
glBegin(GL_QUADS);
{
glTexCoord2f(0.0,0.0);
glVertex3f(firstVisualIndex, -1.0f, 0.0f);
glTexCoord2f(1.0, 0.0);
glVertex3f(lastVisualIndex, -1.0f, 0.0f);
glTexCoord2f(1.0,1.0);
glVertex3f(lastVisualIndex, 1.0f, 0.0f);
glTexCoord2f(0.0,1.0);
glVertex3f(firstVisualIndex, 1.0f, 0.0f);
}
glEnd();
m_framebuffer->release();
m_frameShaderProgram->release();
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
if (m_bDumpPng) {
m_framebuffer->toImage().save("m_framebuffer.png");
m_bDumpPng = false;
}
}
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -10.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glTranslatef(0.0, 0.0, 0.0);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
//paint buffer into viewport
{
glViewport(0, 0, m_waveformRenderer->getWidth(), m_waveformRenderer->getHeight());
glBindTexture(GL_TEXTURE_2D, m_framebuffer->texture());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBegin(GL_QUADS);
{
glTexCoord2f(0.0, 0.0);
glVertex3f(-1.0f, -1.0f, 0.0f);
glTexCoord2f(1.0, 0.0);
glVertex3f(1.0f, -1.0f, 0.0f);
glTexCoord2f(1.0, 1.0);
glVertex3f(1.0f, 1.0f, 0.0f);
glTexCoord2f(0.0, 1.0);
glVertex3f(-1.0f, 1.0f, 0.0f);
}
glEnd();
}
glDisable(GL_TEXTURE_2D);
glDisable(GL_ALPHA_TEST);
//DEBUG
/*
glBegin(GL_LINE_LOOP);
{
glColor4f(0.5,1.0,0.5,0.75);
glVertex3f(-1.0f,-1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f,-1.0f, 0.0f);
glVertex3f(-1.0f, 1.0f, 0.0f);
}
glEnd();
*/
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
painter->endNativePainting();
}