Unified · Split
| @@ -2,7 +2,7 @@ · 1 unmodified line | |||
| 2 | #include "draw.h" | 2 | #include "draw.h" |
| 3 | 3 | ||
| 4 | /* | 4 | /* |
| 5 | * compressed data are seuences of byte codes. | 5 | * compressed data are sequences of byte codes. |
| 6 | * if the first byte b has the 0x80 bit set, the next (b^0x80)+1 bytes | 6 | * if the first byte b has the 0x80 bit set, the next (b^0x80)+1 bytes |
| 7 | * are data. otherwise, it's two bytes specifying a previous string to repeat. | 7 | * are data. otherwise, it's two bytes specifying a previous string to repeat. |
| 8 | */ | 8 | */ |
| @@ -26,12 +26,12 @@ does not provide any means for starting new applications; · 25 unmodified lines | |||
| 26 | that facility must be provided by an auxilliary program, | 26 | that facility must be provided by an auxilliary program, |
| 27 | .B wm/toolbar | 27 | .B wm/toolbar |
| 28 | being one such example. | 28 | being one such example. |
| 29 | .SS Control Inferface | 29 | .SS Control Interface |
| 30 | .I Wm | 30 | .I Wm |
| 31 | provides a control interface to programs running inside it | 31 | provides a control interface to programs running inside it |
| 32 | through the | 32 | through the |
| 33 | .B Wmcontext | 33 | .B Wmcontext |
| 34 | adt that can be obtained from via the | 34 | adt that can be obtained from the |
| 35 | .B Draw->Context | 35 | .B Draw->Context |
| 36 | that it passes to applications that it starts | 36 | that it passes to applications that it starts |
| 37 | (see | 37 | (see |
| @@ -5,9 +5,11 @@ devpointer \- I/O interface for the pointer device · 4 unmodified lines | |||
| 5 | .EX | 5 | .EX |
| 6 | include "draw.m"; # for Draw->Pointer | 6 | include "draw.m"; # for Draw->Pointer |
| 7 | include "devpointer.m"; | 7 | include "devpointer.m"; |
| 8 | ptr:= load Devpointer Devpointer->PATH; | 8 | ptr := load Devpointer Devpointer->PATH; |
| 9 | 9 | ||
| 10 | init: fn(file: string, posn: chan of ref Draw->Pointer): int; | 10 | init: fn(); |
| 11 | reader: fn(file: string, posn: chan of ref Draw->Pointer, | ||
| 12 | pid: chan of (int, string)); | ||
| 11 | bytes2ptr: fn(buf: array of byte) : ref Draw->Pointer; | 13 | bytes2ptr: fn(buf: array of byte) : ref Draw->Pointer; |
| 12 | ptr2bytes: fn(ptr: ref Draw->Pointer): array of byte; | 14 | ptr2bytes: fn(ptr: ref Draw->Pointer): array of byte; |
| 13 | .EE | 15 | .EE |
| @@ -20,11 +22,30 @@ converting them to · 6 unmodified lines | |||
| 20 | adts. | 22 | adts. |
| 21 | .PP | 23 | .PP |
| 22 | .B Init | 24 | .B Init |
| 23 | spawns a process to read continually the pointer device specified by | 25 | must be called before any other operation of the module. |
| 24 | .I file | 26 | .PP |
| 25 | and send a | 27 | .B Reader |
| 28 | should be spawned by the caller. | ||
| 29 | It opens the pointer device specified by | ||
| 30 | .IR file , | ||
| 31 | and sends a value | ||
| 32 | .BI ( id,\ err ) | ||
| 33 | on channel | ||
| 34 | .IR pid . | ||
| 35 | On success, | ||
| 36 | .I id | ||
| 37 | is the process ID of the spawned process and | ||
| 38 | .I err | ||
| 39 | is nil; on an error, | ||
| 40 | .I err | ||
| 41 | is a diagnostic, and | ||
| 42 | .I id | ||
| 43 | is undefined. | ||
| 44 | If the file was opened successfully, | ||
| 45 | .B reader | ||
| 46 | continually reads the pointer device and sends | ||
| 26 | .B Pointer | 47 | .B Pointer |
| 27 | adts over the channel specified by | 48 | adts over the channel |
| 28 | .IR posn . | 49 | .IR posn . |
| 29 | If | 50 | If |
| 30 | .I file | 51 | .I file |
| @@ -306,7 +306,7 @@ Returns a reference to the image published as · 305 unmodified lines | |||
| 306 | on display | 306 | on display |
| 307 | .I d | 307 | .I d |
| 308 | by | 308 | by |
| 309 | .B Image.nameimage | 309 | .B Image.name |
| 310 | (see | 310 | (see |
| 311 | .IR draw-image (2)). | 311 | .IR draw-image (2)). |
| 312 | This allows unrelated processes to share the image (eg, a window manager and client). | 312 | This allows unrelated processes to share the image (eg, a window manager and client). |
| @@ -114,7 +114,7 @@ parameter can be · 113 unmodified lines | |||
| 114 | which provides backing store to store obscured parts of the window when necessary, | 114 | which provides backing store to store obscured parts of the window when necessary, |
| 115 | and is used by the window manager and its clients; or | 115 | and is used by the window manager and its clients; or |
| 116 | .BR Draw->Refnone , | 116 | .BR Draw->Refnone , |
| 117 | wihch provides no refresh, and is used for windows that are transient, or are already protected by backing | 117 | which provides no refresh, and is used for windows that are transient, or are already protected by backing |
| 118 | store. | 118 | store. |
| 119 | .TP | 119 | .TP |
| 120 | .IB screen .top( wins ) | 120 | .IB screen .top( wins ) |