4e2adc1f8e
The cause of the bug was that X*DrawImageString draws background according to the extents of the given string, not to extents of the font set, which determine terminal line height. Now, when such a situation is detected, the background is cleared before drawing the characters.
284 lines
8.4 KiB
C
284 lines
8.4 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these librararies and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef lint
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#ifdef VERBOSE_REV_INFO
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static char rcs_id[] = "$XConsortium: TermPrimRenderFontSet.c /main/1 1996/04/21 19:18:53 drk $";
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#endif /* VERBOSE_REV_INFO */
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#endif /* lint */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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#include "TermHeader.h"
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#include "TermPrimP.h"
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#include "TermPrimDebug.h"
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#include "TermPrimRenderP.h"
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#include "TermPrimRenderFontSet.h"
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typedef struct _TermFontSetRec {
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XFontSet fontSet;
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int ascent;
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int height;
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int width;
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} TermFontSetRec, *TermFontSet;
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static void
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FontSetRenderFunction(
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Widget w,
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TermFont font,
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Pixel fg,
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Pixel bg,
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unsigned long flags,
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int x,
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int y,
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unsigned char *string,
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int len
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)
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{
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DtTermPrimitiveWidget tw = (DtTermPrimitiveWidget) w;
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struct termData *tpd = tw->term.tpd;
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XGCValues values;
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unsigned long valueMask;
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TermFontSet termFontSet = (TermFontSet) font->fontInfo;
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int escapement;
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XRectangle extents;
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Boolean fixExtents;
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/* set the renderGC... */
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valueMask = (unsigned long) 0;
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/* set background... */
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if (tpd->renderGC.background != bg) {
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tpd->renderGC.background = bg;
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values.background = bg;
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valueMask |= GCBackground;
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}
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/* since Xlib will be mucking with the GC's font under us, we need to
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* make sure we trash the cached value...
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*/
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tpd->renderGC.fid = (Font) 0;
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escapement = (tpd->mbCurMax == 1) ?
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XmbTextExtents(termFontSet->fontSet, (char *) string, len,
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NULL, &extents) :
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XwcTextExtents(termFontSet->fontSet, (wchar_t*) string, len,
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NULL, &extents);
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/* Text height may be smaller than cellHeight (happens when using font sets).
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In this case we need to fill background manually and then use X*DrawString
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instead of X*DrawImageString */
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fixExtents = extents.height < tpd->cellHeight;
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if (fixExtents) {
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/* set background color as foreground if needed*/
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if (tpd->renderGC.foreground != bg) {
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tpd->renderGC.foreground = bg;
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valueMask|= GCForeground ;
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values.foreground = bg;
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}
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if (valueMask) {
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(void) XChangeGC(XtDisplay(w), tpd->renderGC.gc, valueMask, &values);
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valueMask= (unsigned long) 0;
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}
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/* paint background manually */
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(void) XFillRectangle(XtDisplay(w),
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XtWindow(w),
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tpd->renderGC.gc,
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x,
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y,
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escapement,
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tpd->cellHeight);
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}
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/* set the foreground... */
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if (TermIS_SECURE(flags)) {
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if (tpd->renderGC.foreground != bg) {
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tpd->renderGC.foreground = bg;
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values.foreground = bg;
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valueMask |= GCForeground;
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}
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} else {
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if (tpd->renderGC.foreground != fg) {
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tpd->renderGC.foreground = fg;
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values.foreground = fg;
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valueMask |= GCForeground;
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}
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}
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if (valueMask) {
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(void) XChangeGC(XtDisplay(w), tpd->renderGC.gc, valueMask,
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&values);
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}
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/* draw image string a line of text... */
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if (isDebugFSet('t', 1)) {
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/* we need to clear background after the debug draw and delay,
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so this will cause X*DrawImageString to be always used
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in debug mode */
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fixExtents = 0;
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#ifdef BBA
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#pragma BBA_IGNORE
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#endif /*BBA*/
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/* Fill in the text area so we can see what is going to
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* be displayed...
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*/
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(void) XFillRectangle(XtDisplay(w),
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XtWindow(w),
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tpd->renderGC.gc,
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x,
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y,
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escapement,
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extents.height);
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(void) XSync(XtDisplay(w), False);
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(void) shortSleep(100000);
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}
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if (tpd->mbCurMax == 1)
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{
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/* select right function, we do not want text background be drawn twice */
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(void) (fixExtents ? XmbDrawString: XmbDrawImageString)
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(XtDisplay(w), /* Display */
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XtWindow(w), /* Drawable */
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termFontSet->fontSet, /* XFontSet */
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tpd->renderGC.gc, /* GC */
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x, /* x */
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y + termFontSet->ascent, /* y */
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(char *)string, /* string */
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len); /* length */
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/* handle overstrike... */
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if (TermIS_OVERSTRIKE(flags)) {
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(void) XmbDrawString(XtDisplay(w), /* Display */
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XtWindow(w), /* Drawable */
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termFontSet->fontSet, /* XFontSet */
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tpd->renderGC.gc, /* GC */
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x + 1, /* x */
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y + termFontSet->ascent, /* y */
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(char *)string, /* string */
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len); /* length */
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}
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}
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else
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{
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/* select right function, we do not want text background be drawn twice */
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(void) (fixExtents ? XwcDrawString: XwcDrawImageString)
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(XtDisplay(w), /* Displa*/
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XtWindow(w), /* Drawable */
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termFontSet->fontSet, /* XFontSet */
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tpd->renderGC.gc, /* GC */
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x, /* x */
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y + termFontSet->ascent, /* y */
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(wchar_t *) string, /* string */
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len); /* length */
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/* handle overstrike... */
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if (TermIS_OVERSTRIKE(flags)) {
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(void) XwcDrawString(XtDisplay(w), /* Display */
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XtWindow(w), /* Drawable */
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termFontSet->fontSet, /* XFontSet */
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tpd->renderGC.gc, /* GC */
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x + 1, /* x */
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y + termFontSet->ascent, /* y */
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(wchar_t *) string, /* string */
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len); /* length */
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}
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}
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/* handle the underline enhancement... */
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/* draw the underline... */
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if (TermIS_UNDERLINE(flags)) {
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XDrawLine(XtDisplay(w), /* Display */
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XtWindow(w), /* Window */
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tpd->renderGC.gc, /* GC */
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x, /* X1 */
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y + tpd->cellHeight - 1, /* Y1 */
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x - 1 + escapement, /* X2 */
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y + tpd->cellHeight - 1); /* Y2 */
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}
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}
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static void
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FontSetDestroyFunction(
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Widget w,
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TermFont font
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)
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{
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(void) XtFree((char *) font->fontInfo);
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(void) XtFree((char *) font);
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}
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static void
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FontSetExtentsFunction(
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Widget w,
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TermFont font,
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unsigned char *string,
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int len,
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int *widthReturn,
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int *heightReturn,
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int *ascentReturn
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)
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{
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TermFontSet termFontSet = (TermFontSet) font->fontInfo;
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if (widthReturn) {
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*widthReturn = len * termFontSet->width;
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}
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if (heightReturn) {
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*heightReturn = termFontSet->height;
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}
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if (ascentReturn) {
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*ascentReturn = termFontSet->ascent;
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}
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return;
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}
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TermFont
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_DtTermPrimRenderFontSetCreate(
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Widget w,
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XFontSet fontSet
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)
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{
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TermFont termFont;
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TermFontSet termFontSet;
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XFontSetExtents *fontSetExtents;
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termFont = (TermFont) XtMalloc(sizeof(TermFontRec));
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termFont->renderFunction = FontSetRenderFunction;
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termFont->destroyFunction = FontSetDestroyFunction;
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termFont->extentsFunction = FontSetExtentsFunction;
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termFontSet = (TermFontSet) XtMalloc(sizeof(TermFontSetRec));
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termFontSet->fontSet = fontSet;
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fontSetExtents = XExtentsOfFontSet(fontSet);
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termFontSet->width = fontSetExtents->max_logical_extent.width;
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termFontSet->height = fontSetExtents->max_logical_extent.height;
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termFontSet->ascent = -fontSetExtents->max_logical_extent.y;
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termFont->fontInfo = (XtPointer) termFontSet;
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return(termFont);
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}
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