| 15 |
|
int (*getcur)(); /* get cursor position */ |
| 16 |
|
int (*comout)(); /* command line output */ |
| 17 |
|
int (*comin)(); /* command line input */ |
| 18 |
+ |
double pixaspect; /* pixel aspect ratio */ |
| 19 |
|
int xsiz, ysiz; /* device size */ |
| 20 |
|
int inpready; /* input ready on device */ |
| 21 |
|
}; |
| 24 |
|
extern int (*wrnvec)(), (*errvec)(), (*cmdvec)(); |
| 25 |
|
|
| 26 |
|
extern struct driver *comm_init(); /* stream interface */ |
| 27 |
+ |
/* magic numbers for verification */ |
| 28 |
+ |
#define COM_SENDM 0x6f37 |
| 29 |
+ |
#define COM_RECVM 0x51da |
| 30 |
|
/* stream commands */ |
| 31 |
|
#define COM_CLEAR 0 |
| 32 |
|
#define COM_PAINTR 1 |
| 35 |
|
#define COM_COMIN 4 |
| 36 |
|
#define NREQUESTS 5 /* number of valid requests */ |
| 37 |
|
|
| 38 |
< |
struct device { /* interactive device */ |
| 38 |
> |
extern struct device { /* interactive device */ |
| 39 |
|
char *name; /* device name */ |
| 40 |
|
char *descrip; /* description */ |
| 41 |
|
struct driver *(*init)(); /* initialize device */ |
| 42 |
< |
}; |
| 42 |
> |
} devtable[]; /* supported devices */ |
| 43 |
|
|
| 40 |
– |
extern struct device devtable[]; /* supported devices */ |
| 41 |
– |
|
| 44 |
|
#define MB1 ('\n') /* mouse button 1 */ |
| 45 |
|
#define MB2 ('\r') /* mouse button 2 */ |
| 46 |
|
#define MB3 (' ') /* mouse button 3 */ |
| 47 |
|
#define ABORT ('C'-'@') /* abort key */ |
| 48 |
|
|
| 47 |
– |
#define MAXRES 4000 /* preposterous display resolution */ |
| 48 |
– |
|
| 49 |
|
/* |
| 50 |
|
* struct driver * |
| 51 |
< |
* dname_init(name) |
| 52 |
< |
* char *name; |
| 51 |
> |
* dname_init(name, id) |
| 52 |
> |
* char *name, *id; |
| 53 |
|
* { |
| 54 |
|
* Initialize device and return pointer to driver |
| 55 |
|
* functions. Returns NULL if an error occurred. |
| 56 |
< |
* The name string is used to identify the client. |
| 56 |
> |
* The name string identifies the driver, |
| 57 |
> |
* and the id string identifies the client. |
| 58 |
|
* A device can be open by at most one client. |
| 59 |
|
* Be verbose in error reports; call stderr_v(). |
| 60 |
< |
* If device has its own error output, set errvec. |
| 60 |
> |
* If device has its own error output, set errvec, |
| 61 |
> |
* cmdvec and wrnvec. |
| 62 |
|
* } |
| 63 |
|
* (*dev->close)() |
| 64 |
|
* { |
| 65 |
< |
* Close the device. Reset errvec to stderr_v. |
| 65 |
> |
* Close the device. Reset error vectors. |
| 66 |
|
* } |
| 67 |
|
* (*dev->clear)(xres, yres) |
| 68 |
|
* int xres, yres; |
| 69 |
|
* { |
| 70 |
< |
* Clear the device for xres by yres output. This call must |
| 70 |
> |
* Clear the device for xres by yres output. This call will |
| 71 |
|
* be made prior to any output. |
| 72 |
|
* } |
| 73 |
|
* (*dev->paintr)(col, xmin, ymin, xmax, ymax) |
| 92 |
|
* string ends with '\n', the message is considered complete, |
| 93 |
|
* and the next call can erase it. |
| 94 |
|
* } |
| 95 |
< |
* (*dev->comin)(in) |
| 96 |
< |
* char *in; |
| 95 |
> |
* (*dev->comin)(in, prompt) |
| 96 |
> |
* char *in, *prompt; |
| 97 |
|
* { |
| 98 |
< |
* Read an edited input string from the command line. If |
| 99 |
< |
* an unrecognized control character is entered, terminate |
| 100 |
< |
* input and return the string with only that character. |
| 101 |
< |
* The input string should not contain a newline ('\n'). |
| 102 |
< |
* Must work in consort with comout. |
| 98 |
> |
* Print a prompt then read an edited input command line |
| 99 |
> |
* assuming the in buffer is big enough. Unless prompt is NULL, |
| 100 |
> |
* the driver may substitute its own rview command. This is |
| 101 |
> |
* the most reliable way to repaint areas of the screen. |
| 102 |
> |
* If the user enters an unrecognized control character is entered, |
| 103 |
> |
* terminate input and return the string with only that character. |
| 104 |
> |
* The input string should not contain a newline. The routines in |
| 105 |
> |
* editline.c may be useful. Comin must work in consort with comout. |
| 106 |
|
* } |
| 107 |
|
* xsiz, ysiz |
| 108 |
|
* The maximum allowable x and y dimensions. If any |
| 109 |
|
* size is allowable, these should be set to MAXRES. |
| 110 |
|
* inpready |
| 111 |
< |
* This variable should be positive |
| 112 |
< |
* when characters are ready on the input. |
| 111 |
> |
* This variable should be made positive asynchronously |
| 112 |
> |
* when characters are ready on the input. (Often easiest |
| 113 |
> |
* to check for input during calls to paintr.) |
| 114 |
|
*/ |
