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Diffstat (limited to 'src/XMultibuf.c')
| -rw-r--r-- | src/XMultibuf.c | 722 |
1 files changed, 722 insertions, 0 deletions
diff --git a/src/XMultibuf.c b/src/XMultibuf.c new file mode 100644 index 0000000..55a1777 --- /dev/null +++ b/src/XMultibuf.c @@ -0,0 +1,722 @@ +/* + * $Xorg: XMultibuf.c,v 1.6 2001/02/09 02:03:49 xorgcvs Exp $ + * +Copyright 1989, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + * + * Authors: Jim Fulton, MIT X Consortium + */ + +#define NEED_EVENTS +#define NEED_REPLIES +#include <X11/Xlibint.h> +#include "Xext.h" /* in ../include */ +#include "extutil.h" /* in ../include */ +#include "multibufst.h" /* in ../include */ + +static XExtensionInfo _multibuf_info_data; +static XExtensionInfo *multibuf_info = &_multibuf_info_data; +static /* const */ char *multibuf_extension_name = MULTIBUFFER_PROTOCOL_NAME; + +#define MbufCheckExtension(dpy,i,val) \ + XextCheckExtension (dpy, i, multibuf_extension_name, val) +#define MbufSimpleCheckExtension(dpy,i) \ + XextSimpleCheckExtension (dpy, i, multibuf_extension_name) + + +/***************************************************************************** + * * + * private utility routines * + * * + *****************************************************************************/ + +/* + * find_display - locate the display info block + */ +static int close_display(); +static char *error_string(); +static Bool wire_to_event(); +static Status event_to_wire(); +static /* const */ XExtensionHooks multibuf_extension_hooks = { + NULL, /* create_gc */ + NULL, /* copy_gc */ + NULL, /* flush_gc */ + NULL, /* free_gc */ + NULL, /* create_font */ + NULL, /* free_font */ + close_display, /* close_display */ + wire_to_event, /* wire_to_event */ + event_to_wire, /* event_to_wire */ + NULL, /* error */ + error_string, /* error_string */ +}; + +static /* const */ char *multibuf_error_list[] = { + "BadBuffer", /* MultibufferBadBuffer */ +}; + +static XEXT_GENERATE_FIND_DISPLAY (find_display, multibuf_info, + multibuf_extension_name, + &multibuf_extension_hooks, + MultibufferNumberEvents, NULL) + +static XEXT_GENERATE_CLOSE_DISPLAY (close_display, multibuf_info) + +static XEXT_GENERATE_ERROR_STRING (error_string, multibuf_extension_name, + MultibufferNumberErrors, + multibuf_error_list) + +/* + * wire_to_event - convert a wire event in network format to a C + * event structure + */ +static Bool wire_to_event (dpy, libevent, netevent) + Display *dpy; + XEvent *libevent; + xEvent *netevent; +{ + XExtDisplayInfo *info = find_display (dpy); + + MbufCheckExtension (dpy, info, False); + + switch ((netevent->u.u.type & 0x7f) - info->codes->first_event) { + case MultibufferClobberNotify: + { + XmbufClobberNotifyEvent *ev; + xMbufClobberNotifyEvent *event; + + ev = (XmbufClobberNotifyEvent *) libevent; + event = (xMbufClobberNotifyEvent *) netevent; + ev->type = event->type & 0x7f; + ev->serial = _XSetLastRequestRead(dpy,(xGenericReply *) netevent); + ev->send_event = ((event->type & 0x80) != 0); + ev->display = dpy; + ev->buffer = event->buffer; + ev->state = event->state; + return True; + } + case MultibufferUpdateNotify: + { + XmbufUpdateNotifyEvent *ev; + xMbufUpdateNotifyEvent *event; + + ev = (XmbufUpdateNotifyEvent *) libevent; + event = (xMbufUpdateNotifyEvent *) netevent; + ev->type = event->type & 0x7f; + ev->serial = _XSetLastRequestRead(dpy,(xGenericReply *) netevent); + ev->send_event = ((event->type & 0x80) != 0); + ev->display = dpy; + ev->buffer = event->buffer; + return True; + } + } + return False; +} + + +/* + * event_to_wire - convert a C event structure to a wire event in + * network format + */ +static Status event_to_wire (dpy, libevent, netevent) + Display *dpy; + XEvent *libevent; + xEvent *netevent; +{ + XExtDisplayInfo *info = find_display (dpy); + + MbufCheckExtension (dpy, info, 0); + + switch ((libevent->type & 0x7f) - info->codes->first_event) { + case MultibufferClobberNotify: + { + XmbufClobberNotifyEvent *ev; + xMbufClobberNotifyEvent *event; + + ev = (XmbufClobberNotifyEvent *) libevent; + event = (xMbufClobberNotifyEvent *) netevent; + event->type = ev->type; + event->sequenceNumber = (ev->serial & 0xffff); + event->buffer = ev->buffer; + event->state = ev->state; + return 1; + } + case MultibufferUpdateNotify: + { + XmbufUpdateNotifyEvent *ev; + xMbufUpdateNotifyEvent *event; + + ev = (XmbufUpdateNotifyEvent *) libevent; + event = (xMbufUpdateNotifyEvent *) netevent; + event->type = ev->type; + event->sequenceNumber = (ev->serial & 0xffff); + event->buffer = ev->buffer; + return 1; + } + } + return 0; +} + + +/* + * read_buffer_info - read Buffer Info descriptors from the net; if unable + * to allocate memory, read junk to make sure that stream is clear. + */ +#define TALLOC(type,count) ((type *) Xmalloc ((unsigned) count * sizeof(type))) + +static XmbufBufferInfo *read_buffer_info (dpy, nbufs) + Display *dpy; + int nbufs; +{ + xMbufBufferInfo *netbuf = TALLOC (xMbufBufferInfo, nbufs); + XmbufBufferInfo *bufinfo = NULL; + long netbytes = nbufs * SIZEOF(xMbufBufferInfo); + + if (netbuf) { + _XRead (dpy, (char *) netbuf, netbytes); + + bufinfo = TALLOC (XmbufBufferInfo, nbufs); + if (bufinfo) { + register XmbufBufferInfo *c; + register xMbufBufferInfo *net; + register int i; + + for (i = 0, c = bufinfo, net = netbuf; i < nbufs; + i++, c++, net++) { + c->visualid = net->visualID; + c->max_buffers = net->maxBuffers; + c->depth = net->depth; + } + } + Xfree ((char *) netbuf); + } else { /* eat the data */ + while (netbytes > 0) { + char dummy[256]; /* stack size vs loops tradeoff */ + long nbytes = sizeof dummy; + + if (nbytes > netbytes) nbytes = netbytes; + _XRead (dpy, dummy, nbytes); + netbytes -= nbytes; + } + } + + return bufinfo; +} + +#undef TALLOC + + +/***************************************************************************** + * * + * Multibuffering/stereo public interfaces * + * * + *****************************************************************************/ + + +/* + * XmbufQueryExtension - + * Returns True if the multibuffering/stereo extension is available + * on the given display. If the extension exists, the value of the + * first event code (which should be added to the event type constants + * MultibufferClobberNotify and MultibufferUpdateNotify to get the + * actual values) is stored into event_base and the value of the first + * error code (which should be added to the error type constant + * MultibufferBadBuffer to get the actual value) is stored into + * error_base. + */ +Bool XmbufQueryExtension (dpy, event_base_return, error_base_return) + Display *dpy; + int *event_base_return, *error_base_return; +{ + XExtDisplayInfo *info = find_display (dpy); + + if (XextHasExtension (info)) { + *event_base_return = info->codes->first_event; + *error_base_return = info->codes->first_error; + return True; + } else { + return False; + } +} + + +/* + * XmbufGetVersion - + * Gets the major and minor version numbers of the extension. The return + * value is zero if an error occurs or non-zero if no error happens. + */ +Status XmbufGetVersion (dpy, major_version_return, minor_version_return) + Display *dpy; + int *major_version_return, *minor_version_return; +{ + XExtDisplayInfo *info = find_display (dpy); + xMbufGetBufferVersionReply rep; + register xMbufGetBufferVersionReq *req; + + MbufCheckExtension (dpy, info, 0); + + LockDisplay (dpy); + MbufGetReq (MbufGetBufferVersion, req, info); + if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + *major_version_return = rep.majorVersion; + *minor_version_return = rep.minorVersion; + UnlockDisplay (dpy); + + SyncHandle (); + return 1; +} + + +/* + * XmbufCreateBuffers - + * Requests that "count" buffers be created with the given update_action + * and update_hint and be associated with the indicated window. The + * number of buffers created is returned (zero if an error occurred) + * and buffers_return is filled in with that many Multibuffer identifiers. + */ +int XmbufCreateBuffers (dpy, w, count, update_action, update_hint, buffers) + Display *dpy; + Window w; + int count; + int update_action, update_hint; + Multibuffer *buffers; +{ + XExtDisplayInfo *info = find_display (dpy); + xMbufCreateImageBuffersReply rep; + register xMbufCreateImageBuffersReq *req; + int result; + + MbufCheckExtension (dpy, info, 0); + + LockDisplay (dpy); + + XAllocIDs(dpy, buffers, count); + MbufGetReq (MbufCreateImageBuffers, req, info); + req->window = w; + req->updateAction = update_action; + req->updateHint = update_hint; + req->length += count; + count <<= 2; + PackData32 (dpy, buffers, count); + if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + result = rep.numberBuffer; + UnlockDisplay (dpy); + + SyncHandle (); + return result; +} + + +/* + * XmbufDestroyBuffers - + * Destroys the buffers associated with the given window. + */ +void XmbufDestroyBuffers (dpy, window) + Display *dpy; + Window window; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufDestroyImageBuffersReq *req; + + MbufSimpleCheckExtension (dpy, info); + + LockDisplay (dpy); + MbufGetReq (MbufDestroyImageBuffers, req, info); + req->window = window; + UnlockDisplay (dpy); + SyncHandle (); +} + + +/* + * XmbufDisplayBuffers - + * Displays the indicated buffers their appropriate windows within + * max_delay milliseconds after min_delay milliseconds have passed. + * No two buffers may be associated with the same window or else a Matc + * error is generated. + */ +void XmbufDisplayBuffers (dpy, count, buffers, min_delay, max_delay) + Display *dpy; + int count; + Multibuffer *buffers; + int min_delay, max_delay; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufDisplayImageBuffersReq *req; + + MbufSimpleCheckExtension (dpy, info); + + LockDisplay (dpy); + MbufGetReq (MbufDisplayImageBuffers, req, info); + req->minDelay = min_delay; + req->maxDelay = max_delay; + req->length += count; + count <<= 2; + PackData32 (dpy, buffers, count); + UnlockDisplay (dpy); + SyncHandle(); +} + + +/* + * XmbufGetWindowAttributes - + * Gets the multibuffering attributes that apply to all buffers associated + * with the given window. Returns non-zero on success and zero if an + * error occurs. + */ +Status XmbufGetWindowAttributes (dpy, w, attr) + Display *dpy; + Window w; + XmbufWindowAttributes *attr; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufGetMBufferAttributesReq *req; + xMbufGetMBufferAttributesReply rep; + + MbufCheckExtension (dpy, info, 0); + + LockDisplay (dpy); + MbufGetReq (MbufGetMBufferAttributes, req, info); + req->window = w; + if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + attr->buffers = (Multibuffer *) NULL; + if ((attr->nbuffers = rep.length)) { + int nbytes = rep.length * sizeof(Multibuffer); + attr->buffers = (Multibuffer *) Xmalloc((unsigned) nbytes); + nbytes = rep.length << 2; + if (! attr->buffers) { + _XEatData(dpy, (unsigned long) nbytes); + UnlockDisplay(dpy); + SyncHandle(); + return (0); + } + _XRead32 (dpy, (char *) attr->buffers, nbytes); + } + attr->displayed_index = rep.displayedBuffer; + attr->update_action = rep.updateAction; + attr->update_hint = rep.updateHint; + attr->window_mode = rep.windowMode; + + UnlockDisplay (dpy); + SyncHandle(); + return 1; +} + + +/* + * XmbufChangeWindowAttributes - + * Sets the multibuffering attributes that apply to all buffers associated + * with the given window. This is currently limited to the update_hint. + */ +void XmbufChangeWindowAttributes (dpy, w, valuemask, attr) + Display *dpy; + Window w; + unsigned long valuemask; + XmbufSetWindowAttributes *attr; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufSetMBufferAttributesReq *req; + + MbufSimpleCheckExtension (dpy, info); + + LockDisplay (dpy); + MbufGetReq (MbufSetMBufferAttributes, req, info); + req->window = w; + if ((req->valueMask = valuemask)) { /* stolen from lib/X/XWindow.c */ + unsigned long values[1]; /* one per element in if stmts below */ + unsigned long *v = values; + unsigned int nvalues; + + if (valuemask & MultibufferWindowUpdateHint) + *v++ = attr->update_hint; + req->length += (nvalues = v - values); + nvalues <<= 2; /* watch out for macros... */ + Data32 (dpy, (long *) values, (long)nvalues); + } + UnlockDisplay (dpy); + SyncHandle(); +} + + +/* + * XmbufGetBufferAttributes - + * Gets the attributes for the indicated buffer. Returns non-zero on + * success and zero if an error occurs. + */ +Status XmbufGetBufferAttributes (dpy, b, attr) + Display *dpy; + Multibuffer b; + XmbufBufferAttributes *attr; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufGetBufferAttributesReq *req; + xMbufGetBufferAttributesReply rep; + + MbufCheckExtension (dpy, info, 0); + + LockDisplay (dpy); + MbufGetReq (MbufGetBufferAttributes, req, info); + req->buffer = b; + if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + attr->window = rep.window; + attr->event_mask = rep.eventMask; + attr->buffer_index = rep.bufferIndex; + attr->side = rep.side; + + UnlockDisplay (dpy); + SyncHandle(); + return 1; +} + + +/* + * XmbufChangeBufferAttributes - + * Sets the attributes for the indicated buffer. This is currently + * limited to the event_mask. + */ +void XmbufChangeBufferAttributes (dpy, b, valuemask, attr) + Display *dpy; + Multibuffer b; + unsigned long valuemask; + XmbufSetBufferAttributes *attr; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufSetBufferAttributesReq *req; + + MbufSimpleCheckExtension (dpy, info); + + LockDisplay (dpy); + MbufGetReq (MbufSetBufferAttributes, req, info); + req->buffer = b; + if ((req->valueMask = valuemask)) { /* stolen from lib/X/XWindow.c */ + unsigned long values[1]; /* one per element in if stmts below */ + unsigned long *v = values; + unsigned int nvalues; + + if (valuemask & MultibufferBufferEventMask) + *v++ = attr->event_mask; + req->length += (nvalues = v - values); + nvalues <<= 2; /* watch out for macros... */ + Data32 (dpy, (long *) values, (long)nvalues); + } + UnlockDisplay (dpy); + SyncHandle(); +} + + + +/* + * XmbufGetScreenInfo - + * Gets the parameters controlling how mono and stereo windows may be + * created on the indicated screen. The numbers of sets of visual and + * depths are returned in nmono_return and nstereo_return. If + * nmono_return is greater than zero, then mono_info_return is set to + * the address of an array of XmbufBufferInfo structures describing the + * various visuals and depths that may be used. Otherwise, + * mono_info_return is set to NULL. Similarly, stereo_info_return is + * set according to nstereo_return. The storage returned in + * mono_info_return and stereo_info_return may be released by XFree. + * If no errors are encounted, non-zero will be returned. + */ +Status XmbufGetScreenInfo (dpy, d, nmono_return, mono_info_return, + nstereo_return, stereo_info_return) + Display *dpy; + Drawable d; + int *nmono_return; + XmbufBufferInfo **mono_info_return; + int *nstereo_return; + XmbufBufferInfo **stereo_info_return; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufGetBufferInfoReq *req; + xMbufGetBufferInfoReply rep; + int nmono, nstereo; + XmbufBufferInfo *minfo, *sinfo; + + MbufCheckExtension (dpy, info, 0); + + LockDisplay (dpy); + MbufGetReq (MbufGetBufferInfo, req, info); + req->drawable = d; + if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + nmono = rep.normalInfo; + nstereo = rep.stereoInfo; + minfo = ((nmono > 0) ? read_buffer_info (dpy, nmono) : NULL); + sinfo = ((nstereo > 0) ? read_buffer_info (dpy, nstereo) : NULL); + + /* check for bad reads indicating we need to return an error */ + if ((nmono > 0 && !minfo) || (nstereo > 0 && !sinfo)) { + if (minfo) Xfree ((char *) minfo); + if (sinfo) Xfree ((char *) sinfo); + UnlockDisplay (dpy); + SyncHandle(); + return 0; + } + + *nmono_return = nmono; + *mono_info_return = minfo; + *nstereo_return = nstereo; + *stereo_info_return = sinfo; + + UnlockDisplay (dpy); + SyncHandle(); + return 1; +} + + +/* + * XmbufCreateStereoWindow - + * Creates a stereo window in the same way that XCreateWindow creates + * a mono window (in fact, use the same code, except for the request) + * and returns the left and right buffers that may be + */ +Window XmbufCreateStereoWindow (dpy, parent, x, y, width, height, border_width, + depth, class, visual, valuemask, attr, + leftp, rightp) + Display *dpy; + Window parent; + int x, y; + unsigned int width, height, border_width; + int depth; + unsigned int class; + Visual *visual; + unsigned long valuemask; + XSetWindowAttributes *attr; + Multibuffer *leftp, *rightp; +{ + XExtDisplayInfo *info = find_display (dpy); + Window wid; + register xMbufCreateStereoWindowReq *req; + + MbufCheckExtension (dpy, info, None); + + LockDisplay(dpy); + MbufGetReq(MbufCreateStereoWindow, req, info); + wid = req->wid = XAllocID(dpy); + req->parent = parent; + req->left = *leftp = XAllocID (dpy); + req->right = *rightp = XAllocID (dpy); + req->x = x; + req->y = y; + req->width = width; + req->height = height; + req->borderWidth = border_width; + req->depth = depth; + req->class = class; + if (visual == CopyFromParent) + req->visual = CopyFromParent; + else + req->visual = visual->visualid; + valuemask &= (CWBackPixmap|CWBackPixel|CWBorderPixmap| + CWBorderPixel|CWBitGravity|CWWinGravity| + CWBackingStore|CWBackingPlanes|CWBackingPixel| + CWOverrideRedirect|CWSaveUnder|CWEventMask| + CWDontPropagate|CWColormap|CWCursor); + if ((req->mask = valuemask)) { + unsigned long values[32]; + register unsigned long *value = values; + unsigned int nvalues; + + if (valuemask & CWBackPixmap) + *value++ = attr->background_pixmap; + if (valuemask & CWBackPixel) + *value++ = attr->background_pixel; + if (valuemask & CWBorderPixmap) + *value++ = attr->border_pixmap; + if (valuemask & CWBorderPixel) + *value++ = attr->border_pixel; + if (valuemask & CWBitGravity) + *value++ = attr->bit_gravity; + if (valuemask & CWWinGravity) + *value++ = attr->win_gravity; + if (valuemask & CWBackingStore) + *value++ = attr->backing_store; + if (valuemask & CWBackingPlanes) + *value++ = attr->backing_planes; + if (valuemask & CWBackingPixel) + *value++ = attr->backing_pixel; + if (valuemask & CWOverrideRedirect) + *value++ = attr->override_redirect; + if (valuemask & CWSaveUnder) + *value++ = attr->save_under; + if (valuemask & CWEventMask) + *value++ = attr->event_mask; + if (valuemask & CWDontPropagate) + *value++ = attr->do_not_propagate_mask; + if (valuemask & CWColormap) + *value++ = attr->colormap; + if (valuemask & CWCursor) + *value++ = attr->cursor; + req->length += (nvalues = value - values); + + nvalues <<= 2; /* watch out for macros... */ + Data32 (dpy, (long *) values, (long)nvalues); + } + UnlockDisplay(dpy); + SyncHandle(); + return wid; +} + +void XmbufClearBufferArea (dpy, buffer, x, y, width, height, exposures) + Display *dpy; + Multibuffer buffer; + int x, y; + unsigned int width, height; + Bool exposures; +{ + XExtDisplayInfo *info = find_display (dpy); + register xMbufClearImageBufferAreaReq *req; + + MbufSimpleCheckExtension (dpy, info); + + LockDisplay (dpy); + MbufGetReq (MbufClearImageBufferArea, req, info); + req->buffer = buffer; + req->x = x; + req->y = y; + req->width = width; + req->height = height; + req->exposures = exposures; + UnlockDisplay (dpy); + SyncHandle(); +} + |