void QPainterFilterContext::initializeOnFrame(VideoFrame *vframe)
{
if (!vframe) {
if (!painter) {
painter = new QPainter(); //warning: more than 1 painter on 1 device
}
if (!paint_device) {
paint_device = painter->device();
}
if (!paint_device && !painter->isActive()) {
qWarning("No paint device and painter is not active. No painting!");
return;
}
if (!painter->isActive())
painter->begin(paint_device);
return;
}
VideoFormat format = vframe->format();
if (!format.isValid()) {
qWarning("Not a valid format");
return;
}
if (format.imageFormat() == QImage::Format_Invalid) {
format.setPixelFormat(VideoFormat::Format_RGB32);
if (!cvt) {
cvt = new VideoFrameConverter();
}
*vframe = cvt->convert(*vframe, format);
}
if (paint_device) {
if (painter && painter->isActive()) {
painter->end(); //destroy a paint device that is being painted is not allowed!
}
delete paint_device;
paint_device = 0;
}
Q_ASSERT(video_width > 0 && video_height > 0);
// direct draw on frame data, so use VideoFrame::constBits()
paint_device = new QImage((uchar*)vframe->constBits(0), video_width, video_height, vframe->bytesPerLine(0), format.imageFormat());
if (!painter)
painter = new QPainter();
own_painter = true;
own_paint_device = true; //TODO: what about renderer is not a widget?
painter->begin((QImage*)paint_device);
}
bool GLWidgetRendererPrivate::releaseShaderProgram()
{
video_format.setPixelFormat(VideoFormat::Format_Invalid);
#if NO_QGL_SHADER
if (vert) {
if (program)
glDetachShader(program, vert);
glDeleteShader(vert);
}
if (frag) {
if (program)
glDetachShader(program, frag);
glDeleteShader(frag);
}
if (program) {
glDeleteProgram(program);
program = 0;
}
#else
shader_program->removeAllShaders();
#endif
return true;
}