arti/vt1200
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vt1200/xie/xc/lib/XIE/init.c
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arti d8d54bb990 feat(xie): a client-chosen XIE image is displayed on the VT1200 
The XIE path now runs end to end: XieCreateImage -> XieCreatePhoto ->
XiePutTile -> XieExport(photomap -> depth-1 pixmap) -> XCopyArea(pixmap ->
window), and the client's tile appears on screen at the client's own window
position, pixel-exact.

TWO FAULTS BEHIND THE LONG DEAD END

1. Device model (harness/mame/vt1200.cpp, opt-in VT1200_ACCEL=1).  The
   accelerator's output port 0x5600200 returns the pixel stream the firmware
   pushed into the FIFO -- the firmware then stores it into the drawable itself
   (file 0x125528: MOVE *B6,*B1 ; ADDK 0x10,B1).  The FIFO read pointer was
   never reset between transfers, so consecutive exports read stale words and
   the same fill produced 759 then 516 set pixels.  Reset m_fifo_in/out on the
   data-register write; the export is now deterministic.

2. Measurement, not the device.
   - dwt/screenshot.py without --real reads 1024x1024 at a 128-byte row stride,
     but the VR319 default programs 1280x1024 at a 2048-bit (256-byte) pitch.
     That is the "shifted" picture; --real is the correct read.
   - The earlier "0 differing bytes over 128 KiB" VRAM comparison stepped peek
     by 1024 *bit* addresses, so it scanned rows 0..63 only -- never the window
     at rows 200..263.  Over the real raster the white/black diff is 576 bytes
     spanning exactly those rows.
   - New instrument: decclient does a server-side XGetImage readback of the
     pixmap and window and counts set pixels.  That separated "the server never
     drew it" from "the framebuffer view is wrong".

EVIDENCE (reproduced twice, the second time from a fresh machine)

  no export vs 0xFF : 4096 / 4096 pixels differ
  no export vs 0x00 :    0 / 4096   (the window background is black)
  0xFF      vs 0x00 : 4096 / 4096
  0xAA      vs 0x0F : 2048 / 4096   (the two stripe phases)

Tile byte 0xAA reproduces as 1-pixel vertical stripes, 0x0F as 4-pixel, with
no shear -- so the placement is right and the pixels are the client's.

Contents: xie/ holds DEC XIE 2.3 headers, 84 man pages and complete
client+server source; a libXie.a and decclient built from DEC's own code; the
XIE probes; and evidence/ with every measurement, including explicit
retractions of the earlier wrong readings (VRAM_IDENTICAL_FOR_BOTH_FILLS and
friends).  xie/evidence/XIE_IMAGE_DISPLAYED.md is the report; frames are in
xie/evidence/png/.

The accelerator model stays opt-in: it answers the status poll and relays the
pixel stream, but performs no compositing, so it is a stand-in and the verified
default configuration is unchanged (a no-env run still parks in the level-0
diagnostics menu at PC=3FDCE400).
2026-11-01 23:22:25 +02:00

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/* $XConsortium: init.c,v 1.11 95/04/28 18:01:11 mor Exp $ */
/*
Copyright (c) 1993, 1994 X Consortium
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
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 X CONSORTIUM 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 X Consortium 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 X Consortium.
*/
#define NEED_EVENTS /* so XErrorEvent will get pulled in */
#include "XIElibint.h"
#include "globals.h"
#include "init.h"
#include <stdio.h>
Status
XieInitialize (display, extinfo_ret)
Display *display;
XieExtensionInfo **extinfo_ret;
{
XieExtInfo *xieExtInfo;
XExtCodes *extCodes;
xieQueryImageExtensionReq *req;
xieQueryImageExtensionReply rep;
char *pBuf;
int _XieCloseDisplay();
void _XiePrintError();
int _XieColorAllocEvent();
int _XieDecodeNotifyEvent();
int _XieExportAvailableEvent();
int _XieImportObscuredEvent();
int _XiePhotofloDoneEvent();
int _XieFloError();
LockDisplay (display);
GET_EXTENSION_INFO (display, xieExtInfo);
if (xieExtInfo)
{
*extinfo_ret = xieExtInfo->extInfo;
UnlockDisplay (display);
return (1);
}
*extinfo_ret = NULL;
/*
* XInitExtension() is a public Xlib call and takes the display lock
* itself. Releasing it here is required on a threaded libX11; without
* this the process self-deadlocks inside XQueryExtension(). The
* original code only worked because LockDisplay() was a no-op when
* XInitThreads() had not been called.
*/
UnlockDisplay (display);
extCodes = XInitExtension (display, xieExtName);
if (extCodes == NULL)
/*
* DECwindows registers the extension as "Xie", not the canonical
* "XIE". Extension names are case-sensitive, so retry the DEC
* spelling before giving up. See the VT1200's xdpyinfo output.
*/
extCodes = XInitExtension (display, "Xie");
if (extCodes == NULL)
{
SYNC_HANDLE (display);
return (0);
}
LockDisplay (display);
xieExtInfo = (XieExtInfo *) Xmalloc (sizeof (XieExtInfo));
xieExtInfo->extCodes = extCodes;
xieExtInfo->extInfo = *extinfo_ret =
(XieExtensionInfo *) Xmalloc (sizeof (XieExtensionInfo));
ADD_EXTENSION_INFO (display, xieExtInfo);
GET_REQUEST (QueryImageExtension, pBuf);
BEGIN_REQUEST_HEADER (QueryImageExtension, pBuf, req);
STORE_REQUEST_HEADER (QueryImageExtension, req);
req->majorVersion = xieMajorVersion;
req->minorVersion = xieMinorVersion;
END_REQUEST_HEADER (QueryImageExtension, pBuf, req);
if (_XReply (display, (xReply *)&rep, 0, xFalse) == 0)
{
UnlockDisplay (display);
SYNC_HANDLE (display);
return (0);
}
(*extinfo_ret)->server_major_rev = rep.majorVersion;
(*extinfo_ret)->server_minor_rev = rep.minorVersion;
(*extinfo_ret)->service_class = rep.serviceClass;
(*extinfo_ret)->alignment = rep.alignment;
(*extinfo_ret)->uncnst_mantissa = rep.unconstrainedMantissa;
(*extinfo_ret)->uncnst_min_exp = rep.unconstrainedMinExp;
(*extinfo_ret)->uncnst_max_exp = rep.unconstrainedMaxExp;
(*extinfo_ret)->n_cnst_levels = rep.length;
(*extinfo_ret)->major_opcode = extCodes->major_opcode;
(*extinfo_ret)->first_event = extCodes->first_event;
(*extinfo_ret)->first_error = extCodes->first_error;
(*extinfo_ret)->cnst_levels = (unsigned long *)
Xmalloc (rep.length * sizeof (unsigned long));
_XRead32 (display, (*extinfo_ret)->cnst_levels, rep.length << 2);
/*
* Tell Xlib which function to call when the display is closed.
*
* The XESet* functions are public Xlib entry points: like
* XInitExtension() they take the display lock themselves, so the lock
* must be released around this block on a threaded libX11.
*/
UnlockDisplay (display);
XESetCloseDisplay (display, extCodes->extension, _XieCloseDisplay);
/*
* Tell Xlib how to convert wire events to host format.
*/
XESetWireToEvent (display, extCodes->first_event + xieEvnNoColorAlloc,
_XieColorAllocEvent);
XESetWireToEvent (display, extCodes->first_event + xieEvnNoDecodeNotify,
_XieDecodeNotifyEvent);
XESetWireToEvent (display, extCodes->first_event + xieEvnNoExportAvailable,
_XieExportAvailableEvent);
XESetWireToEvent (display, extCodes->first_event + xieEvnNoImportObscured,
_XieImportObscuredEvent);
XESetWireToEvent (display, extCodes->first_event + xieEvnNoPhotofloDone,
_XiePhotofloDoneEvent);
/*
* Tell Xlib how to convert Flo errors from wire to host format.
* Xlib can convert the other errors for us.
*/
XESetWireToError (display, extCodes->first_error + xieErrNoFlo,
_XieFloError);
/*
* Tell Xlib how to print XIE errors.
*/
XESetPrintErrorValues (display, extCodes->extension, _XiePrintError);
LockDisplay (display);
/*
* If this is the first time XieInitialize has been called,
* we must register the standard technique functions.
*/
if (!_XieTechFuncsInitialized)
{
_XieInitTechFuncTable ();
_XieTechFuncsInitialized = 1;
}
UnlockDisplay (display);
SYNC_HANDLE (display);
return (1);
}
Status
XieQueryTechniques (display, technique_group, ntechniques_ret, techniques_ret)
Display *display;
XieTechniqueGroup technique_group;
int *ntechniques_ret;
XieTechnique **techniques_ret;
{
xieQueryTechniquesReq *req;
xieQueryTechniquesReply rep;
char *pBuf, *pBufStart;
XieTechnique *techRet;
xieTypTechniqueRec *techRec;
int i;
LockDisplay (display);
GET_REQUEST (QueryTechniques, pBuf);
BEGIN_REQUEST_HEADER (QueryTechniques, pBuf, req);
STORE_REQUEST_HEADER (QueryTechniques, req);
req->techniqueGroup = technique_group;
END_REQUEST_HEADER (QueryTechniques, pBuf, req);
if (_XReply (display, (xReply *)&rep, 0, xFalse) == 0)
{
UnlockDisplay (display);
SYNC_HANDLE (display);
*ntechniques_ret = 0;
*techniques_ret = NULL;
return (0);
}
XREAD_INTO_SCRATCH (display, pBuf, rep.length << 2);
pBufStart = pBuf;
*ntechniques_ret = rep.numTechniques;
*techniques_ret = techRet = (XieTechnique *) Xmalloc (
sizeof (XieTechnique) * rep.numTechniques);
for (i = 0; i < (int) rep.numTechniques; i++)
{
GET_TECHNIQUE_REC (pBuf, techRec);
pBuf += SIZEOF (xieTypTechniqueRec);
techRet[i].needs_param = techRec->needsParam;
techRet[i].group = techRec->group;
techRet[i].number = techRec->number;
techRet[i].speed = techRec->speed;
techRet[i].name = (char *) Xmalloc (
(unsigned) techRec->nameLength + 1);
memcpy (techRet[i].name, pBuf, (unsigned) techRec->nameLength);
techRet[i].name[techRec->nameLength] = '\0';
pBuf += PADDED_BYTES (techRec->nameLength);
}
FINISH_WITH_SCRATCH (display, pBufStart, rep.length << 2);
UnlockDisplay (display);
SYNC_HANDLE (display);
return (1);
}
/*
* Routine called when a display is closed via XCloseDisplay.
* The extension information attached to this display is freed.
* The callback is set up in XieInitialize.
*/
int
_XieCloseDisplay (display, codes)
Display *display;
XExtCodes *codes;
{
XieExtInfo *xieExtInfo;
REMOVE_EXTENSION_INFO (display, xieExtInfo);
if (xieExtInfo == NULL)
return (0);
else
{
Xfree ((char *) xieExtInfo->extInfo->cnst_levels);
Xfree ((char *) xieExtInfo->extInfo);
Xfree ((char *) xieExtInfo);
return (1);
}
}
/*
* Routine called when Xlib wants to print an error. This callback
* is setup in XieInitialize.
*/
void
_XiePrintError (display, error, fp)
Display *display;
XErrorEvent *error;
#if NeedFunctionPrototypes
void *fp;
#else
FILE *fp;
#endif
{
XieExtInfo *xieExtInfo;
XieFloAccessError *flo_error = (XieFloAccessError *) error;
XieFloResourceError *res_error = (XieFloResourceError *) error;
XieFloDomainError *domain_error = (XieFloDomainError *) error;
XieFloOperatorError *operator_error = (XieFloOperatorError *) error;
XieFloTechniqueError *tech_error = (XieFloTechniqueError *) error;
XieFloValueError *value_error = (XieFloValueError *) error;
/*
* Xlib bug - extension codes should be passed to this function,
* but they're not. We must get them ourselves.
*/
GET_EXTENSION_INFO (display, xieExtInfo);
if (error->error_code ==
xieExtInfo->extCodes->first_error + xieErrNoFlo)
{
/*
* Print the flo error type.
*/
fprintf (fp, " Flo error: ");
switch (flo_error->flo_error_code)
{
case xieErrNoFloAccess:
fprintf (fp, "FloAccess\n");
break;
case xieErrNoFloAlloc:
fprintf (fp, "FloAlloc\n");
break;
case xieErrNoFloElement:
fprintf (fp, "FloElement\n");
break;
case xieErrNoFloID:
fprintf (fp, "FloID\n");
break;
case xieErrNoFloMatch:
fprintf (fp, "FloMatch\n");
break;
case xieErrNoFloSource:
fprintf (fp, "FloSource\n");
break;
case xieErrNoFloColormap:
fprintf (fp, "FloColormap\n");
break;
case xieErrNoFloColorList:
fprintf (fp, "FloColorList\n");
break;
case xieErrNoFloDrawable:
fprintf (fp, "FloDrawable\n");
break;
case xieErrNoFloGC:
fprintf (fp, "FloGC\n");
break;
case xieErrNoFloLUT:
fprintf (fp, "FloLUT\n");
break;
case xieErrNoFloPhotomap:
fprintf (fp, "FloPhotomap\n");
break;
case xieErrNoFloROI:
fprintf (fp, "FloROI\n");
break;
case xieErrNoFloDomain:
fprintf (fp, "FloDomain\n");
break;
case xieErrNoFloOperator:
fprintf (fp, "FloOperator\n");
break;
case xieErrNoFloTechnique:
fprintf (fp, "FloTechnique\n");
break;
case xieErrNoFloValue:
fprintf (fp, "FloValue\n");
break;
case xieErrNoFloImplementation:
fprintf (fp, "FloImplementation\n");
break;
default:
break;
}
/*
* All flo errors have this basic info to print.
*/
fprintf (fp, " Name-space: 0x%lx\n", flo_error->name_space);
fprintf (fp, " Phototag: %d\n", flo_error->phototag);
fprintf (fp, " Element type: %d\n", flo_error->elem_type);
/*
* Now handle the particularites of each flo error.
*/
switch (flo_error->flo_error_code)
{
case xieErrNoFloAccess:
case xieErrNoFloAlloc:
case xieErrNoFloElement:
case xieErrNoFloID:
case xieErrNoFloMatch:
case xieErrNoFloSource:
case xieErrNoFloImplementation:
break;
case xieErrNoFloColormap:
fprintf (fp, " Colormap: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloColorList:
fprintf (fp, " ColorList: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloDrawable:
fprintf (fp, " Drawable: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloGC:
fprintf (fp, " GC: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloLUT:
fprintf (fp, " LUT: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloPhotomap:
fprintf (fp, " Photomap: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloROI:
fprintf (fp, " ROI: 0x%lx\n", res_error->resource_id);
break;
case xieErrNoFloDomain:
fprintf (fp, " Phototag of domain src: %d\n",
domain_error->domain_src);
break;
case xieErrNoFloOperator:
fprintf (fp, " Operator: 0x%lx\n", operator_error->operator);
break;
case xieErrNoFloTechnique:
fprintf (fp, " Technique number: 0x%lx\n",
tech_error->technique_number);
fprintf (fp, " Number of technique params: %d\n",
tech_error->num_tech_params);
fprintf (fp, " Technique group: %d\n",
tech_error->tech_group);
break;
case xieErrNoFloValue:
fprintf (fp, " Bad value: 0x%lx\n", value_error->bad_value);
break;
default:
break;
}
}
}
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