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ab965d9541
wine/graphics/x11drv/text.c
Damyan Ognyanoff ab965d9541 Added error correction when using symbol offsets.
2000-09-22 20:57:36 +00:00

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/*
* X11 graphics driver text functions
*
* Copyright 1993,1994 Alexandre Julliard
*/
#include "config.h"
#include <X11/Xatom.h>
#include "ts_xlib.h"
#include <stdlib.h>
#include <math.h>
#include "windef.h"
#include "winnls.h"
#include "dc.h"
#include "gdi.h"
#include "heap.h"
#include "x11font.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(text);
#define SWAP_INT(a,b) { int t = a; a = b; b = t; }
#define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
/***********************************************************************
* X11DRV_ExtTextOut
*/
BOOL
X11DRV_ExtTextOut( DC *dc, INT x, INT y, UINT flags,
const RECT *lprect, LPCWSTR wstr, UINT count,
const INT *lpDx )
{
int i;
fontObject* pfo;
INT width, ascent, descent, xwidth, ywidth;
XFontStruct* font;
RECT rect;
char dfBreakChar, lfUnderline, lfStrikeOut;
BOOL rotated = FALSE;
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
XChar2b *str2b = NULL;
BOOL dibUpdateFlag = FALSE;
BOOL result = TRUE;
if (!X11DRV_SetupGCForText( dc )) return TRUE;
pfo = XFONT_GetFontObject( physDev->font );
font = pfo->fs;
if (pfo->lf.lfEscapement && pfo->lpX11Trans)
rotated = TRUE;
dfBreakChar = (char)pfo->fi->df.dfBreakChar;
lfUnderline = (pfo->fo_flags & FO_SYNTH_UNDERLINE) ? 1 : 0;
lfStrikeOut = (pfo->fo_flags & FO_SYNTH_STRIKEOUT) ? 1 : 0;
TRACE("hdc=%04x df=%04x %d,%d %s, %d flags=%d lpDx=%p\n",
dc->hSelf, (UINT16)(physDev->font), x, y,
debugstr_wn (wstr, count), count, flags, lpDx);
/* some strings sent here end in a newline for whatever reason. I have no
clue what the right treatment should be in general, but ignoring
terminating newlines seems ok. MW, April 1998. */
if (count > 0 && wstr[count - 1] == '\n') count--;
if (lprect != NULL) TRACE("\trect=(%d,%d - %d,%d)\n",
lprect->left, lprect->top,
lprect->right, lprect->bottom );
/* Setup coordinates */
if (dc->w.textAlign & TA_UPDATECP)
{
x = dc->w.CursPosX;
y = dc->w.CursPosY;
}
if (flags & (ETO_OPAQUE | ETO_CLIPPED)) /* there's a rectangle */
{
if (!lprect) /* not always */
{
SIZE sz;
if (flags & ETO_CLIPPED) /* Can't clip with no rectangle */
return FALSE;
if (!X11DRV_GetTextExtentPoint( dc, wstr, count, &sz ))
return FALSE;
rect.left = XLPTODP( dc, x );
rect.right = XLPTODP( dc, x+sz.cx );
rect.top = YLPTODP( dc, y );
rect.bottom = YLPTODP( dc, y+sz.cy );
}
else
{
rect.left = XLPTODP( dc, lprect->left );
rect.right = XLPTODP( dc, lprect->right );
rect.top = YLPTODP( dc, lprect->top );
rect.bottom = YLPTODP( dc, lprect->bottom );
}
if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
}
x = XLPTODP( dc, x );
y = YLPTODP( dc, y );
TRACE("\treal coord: x=%i, y=%i, rect=(%d,%d - %d,%d)\n",
x, y, rect.left, rect.top, rect.right, rect.bottom);
/* Draw the rectangle */
if (flags & ETO_OPAQUE)
{
X11DRV_DIB_UpdateDIBSection( dc, FALSE );
dibUpdateFlag = TRUE;
TSXSetForeground( display, physDev->gc, physDev->backgroundPixel );
TSXFillRectangle( display, physDev->drawable, physDev->gc,
dc->w.DCOrgX + rect.left, dc->w.DCOrgY + rect.top,
rect.right-rect.left, rect.bottom-rect.top );
}
if (!count) goto END; /* Nothing more to do */
/* Compute text starting position */
if (lpDx) /* have explicit character cell x offsets in logical coordinates */
{
int extra = dc->wndExtX / 2;
for (i = width = 0; i < count; i++) width += lpDx[i];
width = (width * dc->vportExtX + extra ) / dc->wndExtX;
}
else
{
SIZE sz;
if (!X11DRV_GetTextExtentPoint( dc, wstr, count, &sz ))
return FALSE;
width = XLSTODS(dc, sz.cx);
}
ascent = pfo->lpX11Trans ? pfo->lpX11Trans->ascent : font->ascent;
descent = pfo->lpX11Trans ? pfo->lpX11Trans->descent : font->descent;
xwidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->a /
pfo->lpX11Trans->pixelsize : width;
ywidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->b /
pfo->lpX11Trans->pixelsize : 0;
switch( dc->w.textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
{
case TA_LEFT:
if (dc->w.textAlign & TA_UPDATECP) {
dc->w.CursPosX = XDPTOLP( dc, x + xwidth );
dc->w.CursPosY = YDPTOLP( dc, y - ywidth );
}
break;
case TA_RIGHT:
x -= xwidth;
y += ywidth;
if (dc->w.textAlign & TA_UPDATECP) {
dc->w.CursPosX = XDPTOLP( dc, x );
dc->w.CursPosY = YDPTOLP( dc, y );
}
break;
case TA_CENTER:
x -= xwidth / 2;
y += ywidth / 2;
break;
}
switch( dc->w.textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
{
case TA_TOP:
x -= pfo->lpX11Trans ? ascent * pfo->lpX11Trans->c /
pfo->lpX11Trans->pixelsize : 0;
y += pfo->lpX11Trans ? ascent * pfo->lpX11Trans->d /
pfo->lpX11Trans->pixelsize : ascent;
break;
case TA_BOTTOM:
x += pfo->lpX11Trans ? descent * pfo->lpX11Trans->c /
pfo->lpX11Trans->pixelsize : 0;
y -= pfo->lpX11Trans ? descent * pfo->lpX11Trans->d /
pfo->lpX11Trans->pixelsize : descent;
break;
case TA_BASELINE:
break;
}
/* Set the clip region */
if (flags & ETO_CLIPPED)
{
SaveVisRgn16( dc->hSelf );
CLIPPING_IntersectVisRect( dc, rect.left, rect.top, rect.right,
rect.bottom, FALSE );
}
/* Draw the text background if necessary */
if (!dibUpdateFlag)
{
X11DRV_DIB_UpdateDIBSection( dc, FALSE );
dibUpdateFlag = TRUE;
}
if (dc->w.backgroundMode != TRANSPARENT)
{
/* If rectangle is opaque and clipped, do nothing */
if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
{
/* Only draw if rectangle is not opaque or if some */
/* text is outside the rectangle */
if (!(flags & ETO_OPAQUE) ||
(x < rect.left) ||
(x + width >= rect.right) ||
(y - ascent < rect.top) ||
(y + descent >= rect.bottom))
{
TSXSetForeground( display, physDev->gc,
physDev->backgroundPixel );
TSXFillRectangle( display, physDev->drawable, physDev->gc,
dc->w.DCOrgX + x,
dc->w.DCOrgY + y - ascent,
width,
ascent + descent );
}
}
}
/* Draw the text (count > 0 verified) */
if (!(str2b = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, wstr, count )))
goto FAIL;
TSXSetForeground( display, physDev->gc, physDev->textPixel );
if(!rotated)
{
if (!dc->w.charExtra && !dc->w.breakExtra && !lpDx)
{
X11DRV_cptable[pfo->fi->cptable].pDrawString(
pfo, display, physDev->drawable, physDev->gc,
dc->w.DCOrgX + x, dc->w.DCOrgY + y, str2b, count );
}
else /* Now the fun begins... */
{
XTextItem16 *items, *pitem;
int delta;
/* allocate max items */
pitem = items = HeapAlloc( GetProcessHeap(), 0,
count * sizeof(XTextItem16) );
if(items == NULL) goto FAIL;
delta = i = 0;
if( lpDx ) /* explicit character widths */
{
const long ve_we = dc->vportExtX*0x10000 / dc->wndExtX;
unsigned short err = 0;
while (i < count)
{
/* initialize text item with accumulated delta */
long sum;
long fSum;
sum = 0;
pitem->chars = str2b + i;
pitem->delta = delta;
pitem->nchars = 0;
pitem->font = None;
delta = 0;
/* add characters to the same XTextItem
* until new delta becomes non-zero */
do
{
sum += lpDx[i];
fSum = sum*ve_we+err;
delta = SHIWORD(fSum)
- X11DRV_cptable[pfo->fi->cptable].pTextWidth(
pfo, pitem->chars, pitem->nchars+1);
pitem->nchars++;
} while ((++i < count) && !delta);
pitem++;
err = LOWORD(fSum);
}
}
else /* charExtra or breakExtra */
{
while (i < count)
{
pitem->chars = str2b + i;
pitem->delta = delta;
pitem->nchars = 0;
pitem->font = None;
delta = 0;
do
{
delta += dc->w.charExtra;
if (str2b[i].byte2 == (char)dfBreakChar)
delta += dc->w.breakExtra;
pitem->nchars++;
} while ((++i < count) && !delta);
pitem++;
}
}
X11DRV_cptable[pfo->fi->cptable].pDrawText( pfo, display,
physDev->drawable, physDev->gc,
dc->w.DCOrgX + x, dc->w.DCOrgY + y, items, pitem - items );
HeapFree( GetProcessHeap(), 0, items );
}
}
else /* rotated */
{
/* have to render character by character. */
double offset = 0.0;
int i;
for (i=0; i<count; i++)
{
int char_metric_offset = str2b[i].byte2 + (str2b[i].byte1 << 8)
- font->min_char_or_byte2;
int x_i = IROUND((double) (dc->w.DCOrgX + x) + offset *
pfo->lpX11Trans->a / pfo->lpX11Trans->pixelsize );
int y_i = IROUND((double) (dc->w.DCOrgY + y) - offset *
pfo->lpX11Trans->b / pfo->lpX11Trans->pixelsize );
X11DRV_cptable[pfo->fi->cptable].pDrawString(
pfo, display, physDev->drawable, physDev->gc,
x_i, y_i, &str2b[i], 1);
if (lpDx)
offset += XLSTODS(dc, lpDx[i]);
else
{
offset += (double) (font->per_char ?
font->per_char[char_metric_offset].attributes:
font->min_bounds.attributes)
* pfo->lpX11Trans->pixelsize / 1000.0;
offset += dc->w.charExtra;
if (str2b[i].byte2 == (char)dfBreakChar)
offset += dc->w.breakExtra;
}
}
}
HeapFree( GetProcessHeap(), 0, str2b );
/* Draw underline and strike-out if needed */
if (lfUnderline)
{
long linePos, lineWidth;
if (!TSXGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
linePos = descent - 1;
if (!TSXGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
lineWidth = 0;
else if (lineWidth == 1) lineWidth = 0;
TSXSetLineAttributes( display, physDev->gc, lineWidth,
LineSolid, CapRound, JoinBevel );
TSXDrawLine( display, physDev->drawable, physDev->gc,
dc->w.DCOrgX + x, dc->w.DCOrgY + y + linePos,
dc->w.DCOrgX + x + width, dc->w.DCOrgY + y + linePos );
}
if (lfStrikeOut)
{
long lineAscent, lineDescent;
if (!TSXGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
lineAscent = ascent / 2;
if (!TSXGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
lineDescent = -lineAscent * 2 / 3;
TSXSetLineAttributes( display, physDev->gc, lineAscent + lineDescent,
LineSolid, CapRound, JoinBevel );
TSXDrawLine( display, physDev->drawable, physDev->gc,
dc->w.DCOrgX + x, dc->w.DCOrgY + y - lineAscent,
dc->w.DCOrgX + x + width, dc->w.DCOrgY + y - lineAscent );
}
if (flags & ETO_CLIPPED)
RestoreVisRgn16( dc->hSelf );
goto END;
FAIL:
if(str2b != NULL) HeapFree( GetProcessHeap(), 0, str2b );
result = FALSE;
END:
if (dibUpdateFlag) X11DRV_DIB_UpdateDIBSection( dc, TRUE );
return result;
}
/***********************************************************************
* X11DRV_GetTextExtentPoint
*/
BOOL X11DRV_GetTextExtentPoint( DC *dc, LPCWSTR str, INT count,
LPSIZE size )
{
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
fontObject* pfo = XFONT_GetFontObject( physDev->font );
TRACE("%s %d\n", debugstr_wn(str,count), count);
if( pfo ) {
XChar2b *p = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, str, count );
if (!p) return FALSE;
if( !pfo->lpX11Trans ) {
int dir, ascent, descent;
int info_width;
X11DRV_cptable[pfo->fi->cptable].pTextExtents( pfo, p,
count, &dir, &ascent, &descent, &info_width );
size->cx = abs((info_width + dc->w.breakRem + count *
dc->w.charExtra) * dc->wndExtX / dc->vportExtX);
size->cy = abs((pfo->fs->ascent + pfo->fs->descent) *
dc->wndExtY / dc->vportExtY);
} else {
INT i;
float x = 0.0, y = 0.0;
/* FIXME: Deal with *_char_or_byte2 != 0 situations */
for(i = 0; i < count; i++) {
x += pfo->fs->per_char ?
pfo->fs->per_char[p[i].byte2 - pfo->fs->min_char_or_byte2].attributes :
pfo->fs->min_bounds.attributes;
}
y = pfo->lpX11Trans->RAW_ASCENT + pfo->lpX11Trans->RAW_DESCENT;
TRACE("x = %f y = %f\n", x, y);
x *= pfo->lpX11Trans->pixelsize / 1000.0;
y *= pfo->lpX11Trans->pixelsize / 1000.0;
size->cx = fabs((x + dc->w.breakRem + count * dc->w.charExtra) *
dc->wndExtX / dc->vportExtX);
size->cy = fabs(y * dc->wndExtY / dc->vportExtY);
}
size->cx *= pfo->rescale;
size->cy *= pfo->rescale;
HeapFree( GetProcessHeap(), 0, p );
return TRUE;
}
return FALSE;
}
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