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incubator-nuttx/graphics/nxterm/nxterm.h

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/****************************************************************************
* graphics/nxterm/nxterm.h
*
* 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.
*
****************************************************************************/
#ifndef __GRAPHICS_NXTERM_NXTERM_H
#define __GRAPHICS_NXTERM_NXTERM_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/semaphore.h>
#include <nuttx/fs/fs.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxtk.h>
#include <nuttx/nx/nxfonts.h>
#include <nuttx/nx/nxterm.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* NxTerm Definitions *******************************************************/
/* Bitmap flags */
#define BMFLAGS_NOGLYPH (1 << 0) /* No glyph available, use space */
#define BM_ISSPACE(bm) (((bm)->flags & BMFLAGS_NOGLYPH) != 0)
/* Device path formats */
#define NX_DEVNAME_FORMAT "/dev/nxterm%d"
#define NX_DEVNAME_SIZE 16
/* Semaphore protection */
#define NO_HOLDER (pid_t)-1
/* VT100 escape sequence processing */
#define VT100_MAX_SEQUENCE 3
/****************************************************************************
* Public Types
****************************************************************************/
/* Identifies the state of the VT100 escape sequence processing */
enum nxterm_vt100state_e
{
VT100_NOT_CONSUMED = 0, /* Character is not part of a VT100 escape sequence */
VT100_CONSUMED, /* Character was consumed as part of the VT100 escape processing */
VT100_PROCESSED, /* The full VT100 escape sequence was processed */
VT100_ABORT /* Invalid/unsupported character in buffered escape sequence */
};
/* Describes on set of console window callbacks */
struct nxterm_state_s;
struct nxterm_operations_s
{
int (*fill)(FAR struct nxterm_state_s *priv,
FAR const struct nxgl_rect_s *rect,
nxgl_mxpixel_t wcolor[CONFIG_NX_NPLANES]);
#ifndef CONFIG_NX_WRITEONLY
int (*move)(FAR struct nxterm_state_s *priv,
FAR const struct nxgl_rect_s *rect,
FAR const struct nxgl_point_s *offset);
#endif
int (*bitmap)(FAR struct nxterm_state_s *priv,
FAR const struct nxgl_rect_s *dest,
FAR const void *src[CONFIG_NX_NPLANES],
FAR const struct nxgl_point_s *origin,
unsigned int stride);
};
/* Describes on character on the display */
struct nxterm_bitmap_s
{
uint8_t code; /* Character code */
uint8_t flags; /* See BMFLAGS_* */
struct nxgl_point_s pos; /* Character position */
};
/* Describes the state of one NX console driver */
struct nxterm_state_s
{
FAR const struct nxterm_operations_s *ops; /* Window operations */
FAR void *handle; /* The window handle */
FAR struct nxterm_window_s wndo; /* Describes the window and font */
sem_t exclsem; /* Forces mutually exclusive access */
#ifdef CONFIG_DEBUG_GRAPHICS
pid_t holder; /* Deadlock avoidance */
#endif
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
bool unlinked; /* True: Driver has been unlinked */
uint8_t orefs; /* Open reference count */
#endif
uint8_t minor; /* Device minor number */
/* Text output support */
uint8_t fheight; /* Max height of a font in pixels */
uint8_t fwidth; /* Max width of a font in pixels */
uint8_t spwidth; /* The width of a space */
uint16_t maxchars; /* Size of the bm[] array */
uint16_t nchars; /* Number of chars in the bm[] array */
struct nxgl_point_s fpos; /* Next display position */
/* VT100 escape sequence processing */
char seq[VT100_MAX_SEQUENCE]; /* Buffered characters */
uint8_t nseq; /* Number of buffered characters */
/* Font cache data storage */
FCACHE fcache; /* Font cache handle */
struct nxterm_bitmap_s cursor;
struct nxterm_bitmap_s bm[CONFIG_NXTERM_MXCHARS];
/* Keyboard input support */
#ifdef CONFIG_NXTERM_NXKBDIN
sem_t waitsem; /* Supports waiting for input data */
uint8_t nwaiters; /* Number of threads waiting for data */
uint8_t head; /* rxbuffer head/input index */
uint8_t tail; /* rxbuffer tail/output index */
uint8_t rxbuffer[CONFIG_NXTERM_KBDBUFSIZE];
/* The following is a list if poll structures of threads waiting for
* driver events. The 'struct pollfd' reference for each open is also
* retained in the f_priv field of the 'struct file'.
*/
struct pollfd *fds[CONFIG_NXTERM_NPOLLWAITERS];
#endif /* CONFIG_NXTERM_NXKBDIN */
};
/****************************************************************************
* Public Data
****************************************************************************/
/* This is the common NX driver file operations */
extern const struct file_operations g_nxterm_drvrops;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/* Semaphore helpers */
#ifdef CONFIG_DEBUG_GRAPHICS
int nxterm_semwait(FAR struct nxterm_state_s *priv);
int nxterm_sempost(FAR struct nxterm_state_s *priv);
#else
# define nxterm_semwait(p) nxsem_wait(&p->exclsem)
# define nxterm_sempost(p) nxsem_post(&p->exclsem)
#endif
/* Common device registration/un-registration */
FAR struct nxterm_state_s *nxterm_register(NXTERM handle,
FAR struct nxterm_window_s *wndo,
FAR const struct nxterm_operations_s *ops,
int minor);
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
void nxterm_unregister(FAR struct nxterm_state_s *priv);
#endif
/* Driver methods */
#ifdef CONFIG_NXTERM_NXKBDIN
ssize_t nxterm_read(FAR struct file *filep, FAR char *buffer, size_t len);
int nxterm_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup);
#endif
/* IOCTL handlers */
void nxterm_redraw(NXTERM handle, FAR const struct nxgl_rect_s *rect,
bool more);
#ifdef CONFIG_NXTERM_NXKBDIN
void nxterm_kbdin(NXTERM handle, FAR const uint8_t *buffer, uint8_t buflen);
#endif
int nxterm_resize(NXTERM handle, FAR const struct nxgl_size_s *size);
/* VT100 Terminal emulation */
enum nxterm_vt100state_e nxterm_vt100(FAR struct nxterm_state_s *priv,
char ch);
/* Generic text display helpers */
void nxterm_home(FAR struct nxterm_state_s *priv);
void nxterm_clear(FAR struct nxterm_state_s *priv);
void nxterm_newline(FAR struct nxterm_state_s *priv);
FAR const
struct nxterm_bitmap_s *nxterm_addchar(FAR struct nxterm_state_s *priv,
uint8_t ch);
int nxterm_hidechar(FAR struct nxterm_state_s *priv,
FAR const struct nxterm_bitmap_s *bm);
int nxterm_backspace(FAR struct nxterm_state_s *priv);
void nxterm_fillchar(FAR struct nxterm_state_s *priv,
FAR const struct nxgl_rect_s *rect,
FAR const struct nxterm_bitmap_s *bm);
void nxterm_putc(FAR struct nxterm_state_s *priv, uint8_t ch);
void nxterm_showcursor(FAR struct nxterm_state_s *priv);
void nxterm_hidecursor(FAR struct nxterm_state_s *priv);
/* Scrolling support */
void nxterm_scroll(FAR struct nxterm_state_s *priv, int scrollheight);
#endif /* __GRAPHICS_NXTERM_NXTERM_H */
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