diff options
Diffstat (limited to 'src/Xrender.c')
| -rw-r--r-- | src/Xrender.c | 326 |
1 files changed, 277 insertions, 49 deletions
diff --git a/src/Xrender.c b/src/Xrender.c index 346115f..4df312b 100644 --- a/src/Xrender.c +++ b/src/Xrender.c @@ -1,7 +1,6 @@ /* - * $XFree86: xc/lib/Xrender/Xrender.c,v 1.12 2002/09/29 23:39:44 keithp Exp $ * - * Copyright © 2000 SuSE, Inc. + * Copyright © 2000 SuSE, Inc. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -25,59 +24,288 @@ #include "Xrenderint.h" -XExtensionInfo XRenderExtensionInfo; +XRenderExtInfo XRenderExtensionInfo; char XRenderExtensionName[] = RENDER_NAME; -static int XRenderCloseDisplay(Display *dpy, XExtCodes *codes); - -static /* const */ XExtensionHooks render_extension_hooks = { - NULL, /* create_gc */ - NULL, /* copy_gc */ - NULL, /* flush_gc */ - NULL, /* free_gc */ - NULL, /* create_font */ - NULL, /* free_font */ - XRenderCloseDisplay, /* close_display */ - NULL, /* wire_to_event */ - NULL, /* event_to_wire */ - NULL, /* error */ - NULL, /* error_string */ -}; - -XExtDisplayInfo * +static int XRenderCloseDisplay (Display *dpy, XExtCodes *codes); + +/* + * XRenderExtFindDisplay - look for a display in this extension; keeps a + * cache of the most-recently used for efficiency. (Replaces + * XextFindDisplay.) + */ +static XRenderExtDisplayInfo * +XRenderExtFindDisplay (XRenderExtInfo *extinfo, + Display *dpy) +{ + XRenderExtDisplayInfo *dpyinfo; + + /* + * see if this was the most recently accessed display + */ + if ((dpyinfo = extinfo->cur) && dpyinfo->display == dpy) + return dpyinfo; + + /* + * look for display in list + */ + _XLockMutex(_Xglobal_lock); + for (dpyinfo = extinfo->head; dpyinfo; dpyinfo = dpyinfo->next) { + if (dpyinfo->display == dpy) { + extinfo->cur = dpyinfo; /* cache most recently used */ + _XUnlockMutex(_Xglobal_lock); + return dpyinfo; + } + } + _XUnlockMutex(_Xglobal_lock); + + return NULL; +} + +/* + * If the server is missing support for any of the required depths on + * any screen, tell the application that Render is not present. + */ + +#define DEPTH_MASK(d) (1 << ((d) - 1)) + +/* + * Render requires support for depth 1, 4, 8, 24 and 32 pixmaps + */ + +#define REQUIRED_DEPTHS (DEPTH_MASK(1) | \ + DEPTH_MASK(4) | \ + DEPTH_MASK(8) | \ + DEPTH_MASK(24) | \ + DEPTH_MASK(32)) + +typedef struct _DepthCheckRec { + struct _DepthCheckRec *next; + Display *dpy; + CARD32 missing; + unsigned long serial; +} DepthCheckRec, *DepthCheckPtr; + +static DepthCheckPtr depthChecks; + +static int +XRenderDepthCheckErrorHandler (Display *dpy, XErrorEvent *evt) +{ + if (evt->request_code == X_CreatePixmap && evt->error_code == BadValue) + { + DepthCheckPtr d; + _XLockMutex(_Xglobal_lock); + for (d = depthChecks; d; d = d->next) + if (d->dpy == dpy) + { + if ((long) (evt->serial - d->serial) >= 0) + d->missing |= DEPTH_MASK(evt->resourceid); + break; + } + _XUnlockMutex (_Xglobal_lock); + } +} + +static Bool +XRenderHasDepths (Display *dpy) +{ + int s; + + for (s = 0; s < ScreenCount (dpy); s++) + { + CARD32 depths = 0; + CARD32 missing; + Screen *scr = ScreenOfDisplay (dpy, s); + int d; + + for (d = 0; d < scr->ndepths; d++) + depths |= DEPTH_MASK(scr->depths[d].depth); + missing = ~depths & REQUIRED_DEPTHS; + if (missing) + { + DepthCheckRec dc, **dp; + XErrorHandler previousHandler; + + /* + * Ok, this is ugly. It should be sufficient at this + * point to just return False, but Xinerama is broken at + * this point and only advertises depths which have an + * associated visual. Of course, the other depths still + * work, but the only way to find out is to try them. + */ + dc.dpy = dpy; + dc.missing = 0; + dc.serial = XNextRequest (dpy); + _XLockMutex(_Xglobal_lock); + dc.next = depthChecks; + depthChecks = &dc; + _XUnlockMutex (_Xglobal_lock); + /* + * I suspect this is not really thread safe, but Xlib doesn't + * provide a lot of options here + */ + previousHandler = XSetErrorHandler (XRenderDepthCheckErrorHandler); + /* + * Try each missing depth and see if pixmap creation succeeds + */ + for (d = 1; d <= 32; d++) + /* don't check depth 1 == Xcursor recurses... */ + if ((missing & DEPTH_MASK(d)) && d != 1) + { + Pixmap p; + p = XCreatePixmap (dpy, RootWindow (dpy, s), 1, 1, d); + XFreePixmap (dpy, p); + } + XSync (dpy, False); + XSetErrorHandler (previousHandler); + /* + * Unhook from the list of depth check records + */ + _XLockMutex(_Xglobal_lock); + for (dp = &depthChecks; *dp; dp = &(*dp)->next) + { + if (*dp == &dc) + { + *dp = dc.next; + break; + } + } + _XUnlockMutex (_Xglobal_lock); + if (dc.missing) + return False; + } + } + return True; +} + +/* + * XRenderExtAddDisplay - add a display to this extension. (Replaces + * XextAddDisplay) + */ +static XRenderExtDisplayInfo * +XRenderExtAddDisplay (XRenderExtInfo *extinfo, + Display *dpy, + char *ext_name) +{ + XRenderExtDisplayInfo *dpyinfo; + + dpyinfo = (XRenderExtDisplayInfo *) Xmalloc (sizeof (XRenderExtDisplayInfo)); + if (!dpyinfo) return NULL; + dpyinfo->display = dpy; + dpyinfo->info = NULL; + + if (XRenderHasDepths (dpy)) + dpyinfo->codes = XInitExtension (dpy, ext_name); + else + dpyinfo->codes = NULL; + + /* + * if the server has the extension, then we can initialize the + * appropriate function vectors + */ + if (dpyinfo->codes) { + XESetCloseDisplay (dpy, dpyinfo->codes->extension, + XRenderCloseDisplay); + } else { + /* The server doesn't have this extension. + * Use a private Xlib-internal extension to hang the close_display + * hook on so that the "cache" (extinfo->cur) is properly cleaned. + * (XBUG 7955) + */ + XExtCodes *codes = XAddExtension(dpy); + if (!codes) { + XFree(dpyinfo); + return NULL; + } + XESetCloseDisplay (dpy, codes->extension, XRenderCloseDisplay); + } + + /* + * now, chain it onto the list + */ + _XLockMutex(_Xglobal_lock); + dpyinfo->next = extinfo->head; + extinfo->head = dpyinfo; + extinfo->cur = dpyinfo; + extinfo->ndisplays++; + _XUnlockMutex(_Xglobal_lock); + return dpyinfo; +} + + +/* + * XRenderExtRemoveDisplay - remove the indicated display from the + * extension object. (Replaces XextRemoveDisplay.) + */ +static int +XRenderExtRemoveDisplay (XRenderExtInfo *extinfo, Display *dpy) +{ + XRenderExtDisplayInfo *dpyinfo, *prev; + + /* + * locate this display and its back link so that it can be removed + */ + _XLockMutex(_Xglobal_lock); + prev = NULL; + for (dpyinfo = extinfo->head; dpyinfo; dpyinfo = dpyinfo->next) { + if (dpyinfo->display == dpy) break; + prev = dpyinfo; + } + if (!dpyinfo) { + _XUnlockMutex(_Xglobal_lock); + return 0; /* hmm, actually an error */ + } + + /* + * remove the display from the list; handles going to zero + */ + if (prev) + prev->next = dpyinfo->next; + else + extinfo->head = dpyinfo->next; + + extinfo->ndisplays--; + if (dpyinfo == extinfo->cur) extinfo->cur = NULL; /* flush cache */ + _XUnlockMutex(_Xglobal_lock); + + Xfree ((char *) dpyinfo); + return 1; +} + + + +XRenderExtDisplayInfo * XRenderFindDisplay (Display *dpy) { - XExtDisplayInfo *dpyinfo; + XRenderExtDisplayInfo *dpyinfo; - dpyinfo = XextFindDisplay (&XRenderExtensionInfo, dpy); + dpyinfo = XRenderExtFindDisplay (&XRenderExtensionInfo, dpy); if (!dpyinfo) - dpyinfo = XextAddDisplay (&XRenderExtensionInfo, dpy, - XRenderExtensionName, - &render_extension_hooks, - 0, 0); + dpyinfo = XRenderExtAddDisplay (&XRenderExtensionInfo, dpy, + XRenderExtensionName); return dpyinfo; } static int XRenderCloseDisplay (Display *dpy, XExtCodes *codes) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); - if (info->data) XFree (info->data); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); + if (info->info) XFree (info->info); - return XextRemoveDisplay (&XRenderExtensionInfo, dpy); + return XRenderExtRemoveDisplay (&XRenderExtensionInfo, dpy); } /**************************************************************************** * * - * Render public interfaces * + * Render public interfaces * * * ****************************************************************************/ Bool XRenderQueryExtension (Display *dpy, int *event_basep, int *error_basep) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); - if (XextHasExtension(info)) { + if (RenderHasExtension(info)) { *event_basep = info->codes->first_event; *error_basep = info->codes->first_error; return True; @@ -91,16 +319,16 @@ Status XRenderQueryVersion (Display *dpy, int *major_versionp, int *minor_versionp) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); XRenderInfo *xri; - if (!XextHasExtension (info)) + if (!RenderHasExtension (info)) return 0; if (!XRenderQueryFormats (dpy)) return 0; - xri = (XRenderInfo *) info->data; + xri = info->info; *major_versionp = xri->major_version; *minor_versionp = xri->minor_version; return 1; @@ -161,7 +389,7 @@ _XRenderVersionHandler (Display *dpy, Status XRenderQueryFormats (Display *dpy) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); _XAsyncHandler async; _XrenderVersionState async_state; xRenderQueryVersionReq *vreq; @@ -184,7 +412,7 @@ XRenderQueryFormats (Display *dpy) RenderCheckExtension (dpy, info, 0); LockDisplay (dpy); - if (info->data) + if (info->info) { UnlockDisplay (dpy); return 1; @@ -316,7 +544,7 @@ XRenderQueryFormats (Display *dpy) xSubpixel++; screen++; } - info->data = (XPointer) xri; + info->info = xri; /* * Skip any extra data */ @@ -332,32 +560,32 @@ XRenderQueryFormats (Display *dpy) int XRenderQuerySubpixelOrder (Display *dpy, int screen) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); XRenderInfo *xri; - if (!XextHasExtension (info)) + if (!RenderHasExtension (info)) return SubPixelUnknown; if (!XRenderQueryFormats (dpy)) return SubPixelUnknown; - xri = (XRenderInfo *) info->data; + xri = info->info; return xri->screen[screen].subpixel; } Bool XRenderSetSubpixelOrder (Display *dpy, int screen, int subpixel) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); XRenderInfo *xri; - if (!XextHasExtension (info)) + if (!RenderHasExtension (info)) return False; if (!XRenderQueryFormats (dpy)) return False; - xri = (XRenderInfo *) info->data; + xri = info->info; xri->screen[screen].subpixel = subpixel; return True; } @@ -365,7 +593,7 @@ XRenderSetSubpixelOrder (Display *dpy, int screen, int subpixel) XRenderPictFormat * XRenderFindVisualFormat (Display *dpy, _Xconst Visual *visual) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); int nv; XRenderInfo *xri; XRenderVisual *xrv; @@ -373,7 +601,7 @@ XRenderFindVisualFormat (Display *dpy, _Xconst Visual *visual) RenderCheckExtension (dpy, info, 0); if (!XRenderQueryFormats (dpy)) return 0; - xri = (XRenderInfo *) info->data; + xri = info->info; for (nv = 0, xrv = xri->visual; nv < xri->nvisual; nv++, xrv++) if (xrv->visual == visual) return xrv->format; @@ -386,14 +614,14 @@ XRenderFindFormat (Display *dpy, _Xconst XRenderPictFormat *template, int count) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); int nf; XRenderInfo *xri; RenderCheckExtension (dpy, info, 0); if (!XRenderQueryFormats (dpy)) return 0; - xri = (XRenderInfo *) info->data; + xri = info->info; for (nf = 0; nf < xri->nformat; nf++) { if (mask & PictFormatID) @@ -596,7 +824,7 @@ XRenderQueryPictIndexValues(Display *dpy, _Xconst XRenderPictFormat *format, int *num) { - XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy); xRenderQueryPictIndexValuesReq *req; xRenderQueryPictIndexValuesReply rep; XIndexValue *values; |