static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv,
int bottom, int scrollheight)
{
FAR struct nxcon_bitmap_s *bm;
struct nxgl_rect_s rect;
nxgl_coord_t row;
int ret;
int i;
/* Move each row, one at a time. They could all be moved at once (by calling
* nxcon_redraw), but the since the region is cleared, then re-written, the
* effect would not be good. Below the region is also cleared and re-written,
* however, in much smaller chunks.
*/
rect.pt1.x = 0;
rect.pt2.x = priv->wndo.wsize.w - 1;
for (row = CONFIG_NXCONSOLE_LINESEPARATION; row < bottom; row += scrollheight)
{
/* Create a bounding box the size of one row of characters */
rect.pt1.y = row;
rect.pt2.y = row + scrollheight - 1;
/* Clear the region */
ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
if (ret < 0)
{
gdbg("fill failed: %d\n", errno);
}
/* Fill each character that might lie within in the bounding box */
for (i = 0; i < priv->nchars; i++)
{
bm = &priv->bm[i];
if (bm->pos.y <= rect.pt2.y && bm->pos.y + priv->fheight >= rect.pt1.y)
{
nxcon_fillchar(priv, &rect, bm);
}
}
}
/* Finally, clear the bottom part of the display */
rect.pt1.y = bottom;
rect.pt2.y = priv->wndo.wsize.h- 1;
ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
if (ret < 0)
{
gdbg("nxcon_movedisplay: fill failed: %d\n", errno);
}
}
void nxcon_redraw(NXCONSOLE handle, FAR const struct nxgl_rect_s *rect, bool more)
{
FAR struct nxcon_state_s *priv;
int ret;
int i;
DEBUGASSERT(handle && rect);
gvdbg("rect={(%d,%d),(%d,%d)} more=%s\n",
rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
more ? "true" : "false");
/* Recover our private state structure */
priv = (FAR struct nxcon_state_s *)handle;
/* Get exclusive access to the state structure */
do
{
ret = nxcon_semwait(priv);
/* Check for errors */
if (ret < 0)
{
/* The only expected error is if the wait failed because of it
* was interrupted by a signal.
*/
DEBUGASSERT(errno == EINTR);
}
}
while (ret < 0);
/* Fill the rectangular region with the window background color */
ret = priv->ops->fill(priv, rect, priv->wndo.wcolor);
if (ret < 0)
{
gdbg("fill failed: %d\n", errno);
}
/* Then redraw each character on the display (Only the characters within
* the rectangle will actually be redrawn).
*/
for (i = 0; i < priv->nchars; i++)
{
nxcon_fillchar(priv, rect, &priv->bm[i]);
}
(void)nxcon_sempost(priv);
}