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Diffstat (limited to 'nuttx/graphics/nxconsole/nxcon_scroll.c')
| -rwxr-xr-x | nuttx/graphics/nxconsole/nxcon_scroll.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/nuttx/graphics/nxconsole/nxcon_scroll.c b/nuttx/graphics/nxconsole/nxcon_scroll.c new file mode 100755 index 000000000..81bd3a7e8 --- /dev/null +++ b/nuttx/graphics/nxconsole/nxcon_scroll.c @@ -0,0 +1,239 @@ +/**************************************************************************** + * nuttx/graphics/nxconsole/nxcon_scroll.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <semaphore.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/nx/nx.h> +#include <nuttx/nx/nxfonts.h> + +#include "nxcon_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxcon_movedisplay + * + * Description: + * This function implements the data movement for the scroll operation. If + * we can read the displays framebuffer memory, then the job is pretty + * easy. However, many displays (such as SPI-based LCDs) are often read- + * only. + ****************************************************************************/ + +#ifndef CONFIG_NXCONSOLE_NOGETRUN +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); + } +} +#else +static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv, + int bottom, int scrollheight) +{ + struct nxgl_rect_s rect; + struct nxgl_point_s offset; + int ret; + + /* Move the display in the range of 0-height up one scrollheight. The + * line at the bottom will be reset to the background color automatically. + * + * The source rectangle to be moved. + */ + + rect.pt1.x = 0; + rect.pt1.y = scrollheight + CONFIG_NXCONSOLE_LINESEPARATION; + rect.pt2.x = priv->wndo.wsize.w - 1; + rect.pt2.y = priv->wndo.wsize.h - 1; + + /* The offset that determines how far to move the source rectangle */ + + offset.x = 0; + offset.y = -scrollheight; + + /* Move the source rectangle */ + + ret = priv->move(priv, &rect, &offset); + if (ret < 0) + { + gdbg("move failed: %d\n", errno); + } +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxcon_scroll + ****************************************************************************/ + +void nxcon_scroll(FAR struct nxcon_state_s *priv, int scrollheight) +{ + int i; + int j; + + /* Adjust the vertical position of each character */ + + for (i = 0; i < priv->nchars; ) + { + FAR struct nxcon_bitmap_s *bm = &priv->bm[i]; + + /* Has any part of this character scrolled off the screen? */ + + if (bm->pos.y < scrollheight + CONFIG_NXCONSOLE_LINESEPARATION) + { + /* Yes... Delete the character by moving all of the data */ + + for (j = i; j < priv->nchars-1; j++) + { + memcpy(&priv->bm[j], &priv->bm[j+1], sizeof(struct nxcon_bitmap_s)); + } + + /* Decrement the number of cached characters ('i' is not incremented + * in this case because it already points to the next character) + */ + + priv->nchars--; + } + + /* No.. just decrement its vertical position (moving it "up" the + * display by one line). + */ + + else + { + bm->pos.y -= scrollheight; + + /* We are keeping this one so increment to the next character */ + + i++; + } + } + + /* And move the next display position up by one line as well */ + + priv->fpos.y -= scrollheight; + + /* Move the display in the range of 0-height up one scrollheight. */ + + nxcon_movedisplay(priv, priv->fpos.y, scrollheight); +}
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