/**
* \brief Symmetrize the exposure
*
* The M26C has an interlaced CCD which reads the different fields and
* colors from different sides of the chip. This only works for symmetric
* exposures, symmetric with respect to the center of the CCD chip. This
* method computes a symmetrized exposure object.
*/
Exposure SxCcdM26C::symmetrize(const Exposure& exp) const {
debug(LOG_DEBUG, DEBUG_LOG, 0, "symmetrizing exposure %s",
exp.toString().c_str());
Exposure symexp = exp;
int x[4], y[4];
x[0] = exp.x();
y[0] = exp.y();
x[1] = M26C_WIDTH - x[0];
y[1] = M26C_HEIGHT - y[0];
x[2] = exp.x() + exp.width();
y[2] = exp.y() + exp.height();
x[3] = M26C_WIDTH - x[2];
y[3] = M26C_HEIGHT - y[2];
debug(LOG_DEBUG, DEBUG_LOG, 0, "x[] = %d %d %d %d",
x[0], x[1], x[2], x[3]);
debug(LOG_DEBUG, DEBUG_LOG, 0, "y[] = %d %d %d %d",
y[0], y[1], y[2], y[3]);
// symmetrized origin
ImagePoint origin(min(x, 4), min(y, 4));
// symmetrize size
unsigned int sizex = max(x, 4) - symexp.x();
if (sizex > 3900) {
sizex = 3900;
}
unsigned int sizey = max(y, 4) - symexp.y();
ImageSize size(sizex, sizey);
ImageRectangle frame(origin, size);
symexp.frame(frame);
debug(LOG_DEBUG, DEBUG_LOG, 0, "symmetrized exposure: %s",
symexp.toString().c_str());
return symexp;
}
/**
* \brief Symmetrize the exposure
*
* The M26C has an interlaced CCD which reads the different fields and
* colors from different sides of the chip. This only works for symmetric
* exposures, symmetric with respect to the center of the CCD chip. This
* method computes a symmetrized exposure object.
*/
Exposure SxCcdM26C::symmetrize(const Exposure& exp) const {
debug(LOG_DEBUG, DEBUG_LOG, 0, "symmetrizing exposure %s",
exp.toString().c_str());
Exposure symexp = exp;
int x[4], y[4];
// compute all the possible corner coordinates
x[0] = exp.x(); y[0] = exp.y();
x[1] = M26C_WIDTH - x[0]; y[1] = M26C_HEIGHT - y[0];
x[2] = exp.x() + exp.width(); y[2] = exp.y() + exp.height();
x[3] = M26C_WIDTH - x[2]; y[3] = M26C_HEIGHT - y[2];
debug(LOG_DEBUG, DEBUG_LOG, 0, "x[] = %d %d %d %d",
x[0], x[1], x[2], x[3]);
debug(LOG_DEBUG, DEBUG_LOG, 0, "y[] = %d %d %d %d",
y[0], y[1], y[2], y[3]);
// make the origin with the right divisibility
int xmin = ((min(x, 4) >> 2) << 2) - 4;
if (xmin < 0) { xmin = 0; }
int xmax = M26C_WIDTH - xmin;
int ymin = ((min(y, 4) >> 2) << 2) - 4;
if (ymin < 0) { ymin = 0; }
int ymax = M26C_HEIGHT - ymin;
// symmetrized origin
ImagePoint origin(xmin, ymin);
// symmetrize size
unsigned int sizex = xmax - xmin;
if (sizex > 3900) {
sizex = 3900;
}
unsigned int sizey = ymax - ymin;
ImageSize size(sizex, sizey);
ImageRectangle frame(origin, size);
symexp.frame(frame);
debug(LOG_DEBUG, DEBUG_LOG, 0, "symmetrized exposure: %s",
symexp.toString().c_str());
return symexp;
}
/**
* \brief Start an exposure on the M26C camera
*
* \param exposure exposure structure for the exposure to perform
*/
void SxCcdM26C::startExposure0(const Exposure& exposure) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "exposure %s requested",
exposure.toString().c_str());
// remember the exposre, we need it for the second field for the
// case where we do two fields one after the other
this->exposure = symmetrize(exposure);
m26c = m26cExposure();
// compute a better request for the M26C camera
exposeField(0);
timer.start();
// we are now in exposing state
state = Exposure::exposing;
}
/**
* \brief Start an exposure on the M26C camera
*
* \param exposure exposure structure for the exposure to perform
*/
void SxCcdM26C::startExposure0(const Exposure& exposure) {
debug(LOG_DEBUG, DEBUG_LOG, 0, "exposure %s requested",
exposure.toString().c_str());
// remember the exposure, we need it for the second field for the
// case where we do two fields one after the other
this->exposure = symmetrize(exposure);
// compute a better request for the M26C camera
m26c = m26cExposure();
// start the exposure
if (!camera.reserve("exposure M26C", 1000)) {
std::string msg("cannot reserve camera");
debug(LOG_ERR, DEBUG_LOG, 0, "%s", msg.c_str());
throw std::runtime_error(msg);
}
exposeField(0);
timer.start();
// we are now in exposing state
state(CcdState::exposing);
}