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Diffstat (limited to 'nuttx/graphics/nxconsole/nxcon_putc.c')
-rw-r--r-- | nuttx/graphics/nxconsole/nxcon_putc.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/nuttx/graphics/nxconsole/nxcon_putc.c b/nuttx/graphics/nxconsole/nxcon_putc.c new file mode 100644 index 000000000..d51d79c79 --- /dev/null +++ b/nuttx/graphics/nxconsole/nxcon_putc.c @@ -0,0 +1,203 @@ +/**************************************************************************** + * nuttx/graphics/nxconsole/nxcon_putc.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 <nuttx/ascii.h> + +#include "nxcon_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxcon_putc + * + * Description: + * Render the specified character at the current display position. + * + ****************************************************************************/ + +void nxcon_putc(FAR struct nxcon_state_s *priv, uint8_t ch) +{ + FAR const struct nxcon_bitmap_s *bm; + int lineheight; + + /* Ignore carriage returns */ + + if (ch == '\r') + { + return; + } + + /* Handle backspace (treating both BS and DEL as backspace) */ + + if (ch == ASCII_BS || ch == ASCII_DEL) + { + nxcon_backspace(priv); + return; + } + + /* Will another character fit on this line? */ + + if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w) + { +#ifndef CONFIG_NXCONSOLE_NOWRAP + /* No.. move to the next line */ + + nxcon_newline(priv); + + /* If we were about to output a newline character, then don't */ + + if (ch == '\n') + { + return; + } +#else + /* No.. Ignore all further characters until a newline is encountered */ + + if (ch != '\n') + { + return; + } +#endif + } + + /* If it is a newline character, then just perform the logical newline + * operation. + */ + + if (ch == '\n') + { + nxcon_newline(priv); + return; + } + + /* Check if we need to scroll up */ + + lineheight = (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION); + while (priv->fpos.y >= priv->wndo.wsize.h - lineheight) + { + nxcon_scroll(priv, lineheight); + } + + /* Find the glyph associated with the character and render it onto the + * display. + */ + + bm = nxcon_addchar(priv->font, priv, ch); + if (bm) + { + nxcon_fillchar(priv, NULL, bm); + } +} + +/**************************************************************************** + * Name: nxcon_showcursor + * + * Description: + * Render the cursor character at the current display position. + * + ****************************************************************************/ + +void nxcon_showcursor(FAR struct nxcon_state_s *priv) +{ + int lineheight; + + /* Will another character fit on this line? */ + + if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w) + { +#ifndef CONFIG_NXCONSOLE_NOWRAP + /* No.. move to the next line */ + + nxcon_newline(priv); +#else + return; +#endif + } + + /* Check if we need to scroll up */ + + lineheight = (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION); + while (priv->fpos.y >= priv->wndo.wsize.h - lineheight) + { + nxcon_scroll(priv, lineheight); + } + + /* Render the cursor glyph onto the display. */ + + priv->cursor.pos.x = priv->fpos.x; + priv->cursor.pos.y = priv->fpos.y; + nxcon_fillchar(priv, NULL, &priv->cursor); +} + +/**************************************************************************** + * Name: nxcon_hidecursor + * + * Description: + * Render the cursor cursor character from the display. + * + ****************************************************************************/ + +void nxcon_hidecursor(FAR struct nxcon_state_s *priv) +{ + (void)nxcon_hidechar(priv, &priv->cursor); +} |