| /**************************************************************************** |
| * graphics/nxterm/nxterm_putc.c |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <nuttx/ascii.h> |
| |
| #include "nxterm.h" |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: nxterm_putc |
| * |
| * Description: |
| * Render the specified character at the current display position. |
| * |
| ****************************************************************************/ |
| |
| void nxterm_putc(FAR struct nxterm_state_s *priv, uint8_t ch) |
| { |
| FAR const struct nxterm_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) |
| { |
| nxterm_backspace(priv); |
| return; |
| } |
| |
| /* Will another character fit on this line? */ |
| |
| if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w) |
| { |
| #ifndef CONFIG_NXTERM_NOWRAP |
| /* No.. move to the next line */ |
| |
| nxterm_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') |
| { |
| nxterm_newline(priv); |
| return; |
| } |
| |
| /* Check if we need to scroll up */ |
| |
| lineheight = (priv->fheight + CONFIG_NXTERM_LINESEPARATION); |
| while (priv->fpos.y >= priv->wndo.wsize.h - lineheight) |
| { |
| nxterm_scroll(priv, lineheight); |
| } |
| |
| /* Find the glyph associated with the character and render it onto the |
| * display. |
| */ |
| |
| bm = nxterm_addchar(priv, ch); |
| if (bm) |
| { |
| nxterm_fillchar(priv, NULL, bm); |
| } |
| } |
| |
| /**************************************************************************** |
| * Name: nxterm_showcursor |
| * |
| * Description: |
| * Render the cursor character at the current display position. |
| * |
| ****************************************************************************/ |
| |
| void nxterm_showcursor(FAR struct nxterm_state_s *priv) |
| { |
| int lineheight; |
| |
| /* Will another character fit on this line? */ |
| |
| if (priv->fpos.x + priv->fwidth > priv->wndo.wsize.w) |
| { |
| #ifndef CONFIG_NXTERM_NOWRAP |
| /* No.. move to the next line */ |
| |
| nxterm_newline(priv); |
| #else |
| return; |
| #endif |
| } |
| |
| /* Check if we need to scroll up */ |
| |
| lineheight = (priv->fheight + CONFIG_NXTERM_LINESEPARATION); |
| while (priv->fpos.y >= priv->wndo.wsize.h - lineheight) |
| { |
| nxterm_scroll(priv, lineheight); |
| } |
| |
| /* Render the cursor glyph onto the display. */ |
| |
| priv->cursor.pos.x = priv->fpos.x; |
| priv->cursor.pos.y = priv->fpos.y; |
| nxterm_fillchar(priv, NULL, &priv->cursor); |
| } |
| |
| /**************************************************************************** |
| * Name: nxterm_hidecursor |
| * |
| * Description: |
| * Render the cursor cursor character from the display. |
| * |
| ****************************************************************************/ |
| |
| void nxterm_hidecursor(FAR struct nxterm_state_s *priv) |
| { |
| nxterm_hidechar(priv, &priv->cursor); |
| } |