void GLWidgetRendererPrivate::updateShaderIfNeeded()
{
const VideoFormat& fmt(video_frame.format());
if (fmt != video_format) {
qDebug("pixel format changed: %s => %s", qPrintable(video_format.name()), qPrintable(fmt.name()));
}
VideoMaterialType *newType = materialType(fmt);
if (material_type == newType)
return;
material_type = newType;
// http://forum.doom9.org/archive/index.php/t-160211.html
ColorTransform::ColorSpace cs = ColorTransform::RGB;
if (fmt.isRGB()) {
if (fmt.isPlanar())
cs = ColorTransform::GBR;
} else {
if (video_frame.width() >= 1280 || video_frame.height() > 576) //values from mpv
cs = ColorTransform::BT709;
else
cs = ColorTransform::BT601;
}
if (!prepareShaderProgram(fmt, cs)) {
qWarning("shader program create error...");
return;
} else {
qDebug("shader program created!!!");
}
}
QSGMaterialType *materialType() const { return materialType(m_format); }