static int recv_screen (CalcHandle* handle, CalcScreenCoord* sc, uint8_t** bitmap)
{
uint32_t size = 0;
uint8_t cmd, *data;
int retval;
int type;
CalcInfos infos;
// First of all, we have to identify the Nspire model.
retval = get_version(handle, &infos);
if (!retval)
{
if (infos.bits_per_pixel == 4)
{
// Nspire (CAS) Clickpad or Touchpad.
type = 0;
}
else if (infos.bits_per_pixel == 16)
{
// Nspire (CAS) CX.
type = 1;
}
else
{
ticalcs_critical(_("Unknown calculator model with %d bpp\n"), infos.bits_per_pixel);
return ERR_UNSUPPORTED; // THIS RETURNS !
}
// Do screenshot
TRYF(nsp_session_open(handle, SID_SCREEN_RLE));
TRYF(nsp_cmd_s_screen_rle(handle, 0));
TRYF(nsp_cmd_r_screen_rle(handle, &cmd, &size, &data));
sc->width = sc->clipped_width = (data[8] << 8) | data[9];
sc->height = sc->clipped_height = (data[10] << 8) | data[11];
//size = GUINT32_FROM_BE(*((uint32_t *)(data)));
size = ( (((uint32_t)data[0]) << 24)
| (((uint32_t)data[1]) << 16)
| (((uint32_t)data[2]) << 8)
| (((uint32_t)data[3]) ));
TRYF(nsp_cmd_r_screen_rle(handle, &cmd, &size, &data));
TRYF(nsp_session_close(handle));
*bitmap = rle_uncompress(sc, data, size, type);
g_free(data);
if(*bitmap == NULL)
{
return ERR_MALLOC;
}
retval = 0;
}
return retval;
}
static int recv_screen (CalcHandle* handle, CalcScreenCoord* sc, uint8_t** bitmap)
{
int ret;
CalcInfos infos;
// First of all, we have to identify the Nspire model.
ret = get_version(handle, &infos);
if (!ret)
{
if (infos.bits_per_pixel == 4)
{
// Nspire (CAS) Clickpad or Touchpad.
sc->pixel_format = CALC_PIXFMT_GRAY_4;
}
else if (infos.bits_per_pixel == 16)
{
// Nspire (CAS) CX or CM.
sc->pixel_format = CALC_PIXFMT_RGB_565_LE;
}
else
{
ticalcs_critical(_("Unknown calculator model with %d bpp\n"), infos.bits_per_pixel);
return ERR_UNSUPPORTED; // THIS RETURNS !
}
// Do screenshot
ret = nsp_session_open(handle, NSP_SID_SCREEN_RLE);
if (!ret)
{
ret = nsp_cmd_s_screen_rle(handle, 0);
if (!ret)
{
uint32_t size = 0;
uint8_t cmd, *data;
ret = nsp_cmd_r_screen_rle(handle, &cmd, &size, &data);
if (!ret)
{
sc->width = sc->clipped_width = (((uint16_t)data[8]) << 8) | data[9];
sc->height = sc->clipped_height = (((uint16_t)data[10]) << 8) | data[11];
size = ( (((uint32_t)data[0]) << 24)
| (((uint32_t)data[1]) << 16)
| (((uint32_t)data[2]) << 8)
| (((uint32_t)data[3]) ));
g_free(data);
if (sc->width > 320)
{
ticalcs_critical("%s: no calculator model known to this library has screens of width > 320 pixels", __FUNCTION__);
ret = ERR_INVALID_PACKET;
}
else if (sc->height > 240)
{
ticalcs_critical("%s: no calculator model known to this library has screens of height > 240 pixels", __FUNCTION__);
ret = ERR_INVALID_PACKET;
}
else if (size > 2 * sc->width * sc->height)
{
ticalcs_critical("%s: no calculator model known to this library uses more than 16 bpp", __FUNCTION__);
ret = ERR_INVALID_PACKET;
}
else
{
ret = nsp_cmd_r_screen_rle(handle, &cmd, &size, &data);
if (!ret)
{
uint32_t len = sc->width * sc->height * infos.bits_per_pixel / 8;
uint8_t * dst = ticalcs_alloc_screen(len);
if (dst != NULL)
{
ret = ticalcs_screen_nspire_rle_uncompress(sc->pixel_format, data, size, dst, len);
if (!ret)
{
*bitmap = dst;
}
else
{
ticalcs_free_screen(dst);
}
}
else
{
ret = ERR_MALLOC;
}
g_free(data);
}
}
}
}
DO_CLOSE_SESSION(handle);
}
}
return ret;
}
