graphics/x11drv/text.c

   1 /*
   2  * X11 graphics driver text functions
   3  *
   4  * Copyright 1993,1994 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <X11/Xatom.h>
  24
  25 #include "ts_xlib.h"
  26
  27 #include <stdlib.h>
  28 #include <math.h>
  29
  30 #include "windef.h"
  31 #include "winnls.h"
  32 #include "wownt32.h"
  33 #include "gdi.h"
  34 #include "x11font.h"
  35 #include "bitmap.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(text);
  39
  40 #define SWAP_INT(a,b)  { int t = a; a = b; b = t; }
  41 #define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
  42
  43
  44 /***********************************************************************
  45  *           X11DRV_ExtTextOut
  46  */
  47 BOOL
  48 X11DRV_ExtTextOut( X11DRV_PDEVICE *physDev, INT x, INT y, UINT flags,
  49                    const RECT *lprect, LPCWSTR wstr, UINT count,
  50                    const INT *lpDx )
  51 {
  52     int                 i;
  53     fontObject*         pfo;
  54     INT                 width, ascent, descent, xwidth, ywidth;
  55     XFontStruct*        font;
  56     RECT                rect;
  57     char                dfBreakChar, lfUnderline, lfStrikeOut;
  58     BOOL                rotated = FALSE;
  59     XChar2b             *str2b = NULL;
  60     BOOL                dibUpdateFlag = FALSE;
  61     BOOL                result = TRUE;
  62     POINT               pt;
  63     DC *dc = physDev->dc;
  64
  65     if(dc->gdiFont)
  66         return X11DRV_XRender_ExtTextOut(physDev, x, y, flags, lprect, wstr, count,
  67                                          lpDx);
  68
  69
  70     if (!X11DRV_SetupGCForText( physDev )) return TRUE;
  71
  72     pfo = XFONT_GetFontObject( physDev->font );
  73     font = pfo->fs;
  74
  75     if (pfo->lf.lfEscapement && pfo->lpX11Trans)
  76         rotated = TRUE;
  77     dfBreakChar = (char)pfo->fi->df.dfBreakChar;
  78     lfUnderline = (pfo->fo_flags & FO_SYNTH_UNDERLINE) ? 1 : 0;
  79     lfStrikeOut = (pfo->fo_flags & FO_SYNTH_STRIKEOUT) ? 1 : 0;
  80
  81     TRACE("hdc=%p df=%04x %d,%d %s, %d  flags=%d lpDx=%p\n",
  82           dc->hSelf, (UINT16)(physDev->font), x, y,
  83           debugstr_wn (wstr, count), count, flags, lpDx);
  84
  85     /* some strings sent here end in a newline for whatever reason.  I have no
  86        clue what the right treatment should be in general, but ignoring
  87        terminating newlines seems ok.  MW, April 1998.  */
  88     if (count > 0 && wstr[count - 1] == '\n') count--;
  89
  90     if (lprect != NULL) TRACE("\trect=(%ld,%ld - %ld,%ld)\n",
  91                                      lprect->left, lprect->top,
  92                                      lprect->right, lprect->bottom );
  93       /* Setup coordinates */
  94
  95     if (dc->textAlign & TA_UPDATECP)
  96     {
  97         x = dc->CursPosX;
  98         y = dc->CursPosY;
  99     }
 100
 101     if (flags & (ETO_OPAQUE | ETO_CLIPPED))  /* there's a rectangle */
 102     {
 103         if (!lprect)  /* not always */
 104         {
 105             SIZE sz;
 106             if (flags & ETO_CLIPPED)  /* Can't clip with no rectangle */
 107               return FALSE;
 108             if (!X11DRV_GetTextExtentPoint( physDev, wstr, count, &sz ))
 109               return FALSE;
 110             rect.left   = x;
 111             rect.right  = x + sz.cx;
 112             rect.top    = y;
 113             rect.bottom = y + sz.cy;
 114         }
 115         else
 116         {
 117             rect = *lprect;
 118         }
 119         LPtoDP(physDev->hdc, (POINT*)&rect, 2);
 120
 121         if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
 122         if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
 123     }
 124
 125     pt.x = x;
 126     pt.y = y;
 127     LPtoDP(physDev->hdc, &pt, 1);
 128     x = pt.x;
 129     y = pt.y;
 130
 131     TRACE("\treal coord: x=%i, y=%i, rect=(%ld,%ld - %ld,%ld)\n",
 132                           x, y, rect.left, rect.top, rect.right, rect.bottom);
 133
 134       /* Draw the rectangle */
 135
 136     if (flags & ETO_OPAQUE)
 137     {
 138         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
 139         dibUpdateFlag = TRUE;
 140         TSXSetForeground( gdi_display, physDev->gc, physDev->backgroundPixel );
 141         TSXFillRectangle( gdi_display, physDev->drawable, physDev->gc,
 142                           physDev->org.x + rect.left, physDev->org.y + rect.top,
 143                           rect.right-rect.left, rect.bottom-rect.top );
 144     }
 145     if (!count) goto END;  /* Nothing more to do */
 146
 147       /* Compute text starting position */
 148
 149     if (lpDx) /* have explicit character cell x offsets in logical coordinates */
 150     {
 151         for (i = width = 0; i < count; i++) width += lpDx[i];
 152         width = INTERNAL_XWSTODS(dc, width);
 153     }
 154     else
 155     {
 156         SIZE sz;
 157         if (!X11DRV_GetTextExtentPoint( physDev, wstr, count, &sz ))
 158         {
 159             result = FALSE;
 160             goto END;
 161         }
 162         width = INTERNAL_XWSTODS(dc, sz.cx);
 163     }
 164     ascent = pfo->lpX11Trans ? pfo->lpX11Trans->ascent : font->ascent;
 165     descent = pfo->lpX11Trans ? pfo->lpX11Trans->descent : font->descent;
 166     xwidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->a /
 167       pfo->lpX11Trans->pixelsize : width;
 168     ywidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->b /
 169       pfo->lpX11Trans->pixelsize : 0;
 170
 171     switch( dc->textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
 172     {
 173       case TA_LEFT:
 174           if (dc->textAlign & TA_UPDATECP) {
 175               pt.x = x + xwidth;
 176               pt.y = y - ywidth;
 177               DPtoLP(physDev->hdc, &pt, 1);
 178               dc->CursPosX = pt.x;
 179               dc->CursPosY = pt.y;
 180           }
 181           break;
 182       case TA_RIGHT:
 183           x -= xwidth;
 184           y += ywidth;
 185           if (dc->textAlign & TA_UPDATECP) {
 186               pt.x = x;
 187               pt.y = y;
 188               DPtoLP(physDev->hdc, &pt, 1);
 189               dc->CursPosX = pt.x;
 190               dc->CursPosY = pt.y;
 191           }
 192           break;
 193       case TA_CENTER:
 194           x -= xwidth / 2;
 195           y += ywidth / 2;
 196           break;
 197     }
 198
 199     switch( dc->textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
 200     {
 201       case TA_TOP:
 202           x -= pfo->lpX11Trans ? ascent * pfo->lpX11Trans->c /
 203             pfo->lpX11Trans->pixelsize : 0;
 204           y += pfo->lpX11Trans ? ascent * pfo->lpX11Trans->d /
 205             pfo->lpX11Trans->pixelsize : ascent;
 206           break;
 207       case TA_BOTTOM:
 208           x += pfo->lpX11Trans ? descent * pfo->lpX11Trans->c /
 209             pfo->lpX11Trans->pixelsize : 0;
 210           y -= pfo->lpX11Trans ? descent * pfo->lpX11Trans->d /
 211             pfo->lpX11Trans->pixelsize : descent;
 212           break;
 213       case TA_BASELINE:
 214           break;
 215     }
 216
 217       /* Set the clip region */
 218
 219     if (flags & ETO_CLIPPED)
 220     {
 221         SaveVisRgn16( HDC_16(dc->hSelf) );
 222         IntersectVisRect16( HDC_16(dc->hSelf), lprect->left, lprect->top, lprect->right, lprect->bottom );
 223     }
 224
 225       /* Draw the text background if necessary */
 226
 227     if (!dibUpdateFlag)
 228     {
 229         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
 230         dibUpdateFlag = TRUE;
 231     }
 232
 233     if (GetBkMode( physDev->hdc ) != TRANSPARENT)
 234     {
 235           /* If rectangle is opaque and clipped, do nothing */
 236         if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
 237         {
 238               /* Only draw if rectangle is not opaque or if some */
 239               /* text is outside the rectangle */
 240             if (!(flags & ETO_OPAQUE) ||
 241                 (x < rect.left) ||
 242                 (x + width >= rect.right) ||
 243                 (y - ascent < rect.top) ||
 244                 (y + descent >= rect.bottom))
 245             {
 246                 TSXSetForeground( gdi_display, physDev->gc, physDev->backgroundPixel );
 247                 TSXFillRectangle( gdi_display, physDev->drawable, physDev->gc,
 248                                   physDev->org.x + x, physDev->org.y + y - ascent,
 249                                   width, ascent + descent );
 250             }
 251         }
 252     }
 253
 254     /* Draw the text (count > 0 verified) */
 255     if (!(str2b = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, wstr, count )))
 256         goto FAIL;
 257
 258     TSXSetForeground( gdi_display, physDev->gc, physDev->textPixel );
 259     if(!rotated)
 260     {
 261       if (!dc->charExtra && !dc->breakExtra && !lpDx)
 262       {
 263         X11DRV_cptable[pfo->fi->cptable].pDrawString(
 264                 pfo, gdi_display, physDev->drawable, physDev->gc,
 265                 physDev->org.x + x, physDev->org.y + y, str2b, count );
 266       }
 267       else  /* Now the fun begins... */
 268       {
 269         XTextItem16 *items, *pitem;
 270         int delta;
 271
 272         /* allocate max items */
 273
 274         pitem = items = HeapAlloc( GetProcessHeap(), 0,
 275                                    count * sizeof(XTextItem16) );
 276         if(items == NULL) goto FAIL;
 277         delta = i = 0;
 278         if( lpDx ) /* explicit character widths */
 279         {
 280             long ve_we;
 281             unsigned short err = 0;
 282
 283             ve_we = (LONG)(dc->xformWorld2Vport.eM11 * 0x10000);
 284
 285             while (i < count)
 286             {
 287                 /* initialize text item with accumulated delta */
 288
 289                 long sum;
 290                 long fSum;
 291                 sum = 0;
 292                 pitem->chars  = str2b + i;
 293                 pitem->delta  = delta;
 294                 pitem->nchars = 0;
 295                 pitem->font   = None;
 296                 delta = 0;
 297
 298                 /* add characters to the same XTextItem
 299                  * until new delta becomes non-zero */
 300
 301                 do
 302                 {
 303                     sum += lpDx[i];
 304                     fSum = sum*ve_we+err;
 305                     delta = SHIWORD(fSum)
 306                       - X11DRV_cptable[pfo->fi->cptable].pTextWidth(
 307                                                 pfo, pitem->chars, pitem->nchars+1);
 308                     pitem->nchars++;
 309                 } while ((++i < count) && !delta);
 310                 pitem++;
 311                 err = LOWORD(fSum);
 312            }
 313         }
 314         else /* charExtra or breakExtra */
 315         {
 316             while (i < count)
 317             {
 318                 pitem->chars  = str2b + i;
 319                 pitem->delta  = delta;
 320                 pitem->nchars = 0;
 321                 pitem->font   = None;
 322                 delta = 0;
 323
 324                 do
 325                 {
 326                     delta += dc->charExtra;
 327                     if (str2b[i].byte2 == (char)dfBreakChar)
 328                       delta += dc->breakExtra;
 329                     pitem->nchars++;
 330                 } while ((++i < count) && !delta);
 331                 pitem++;
 332             }
 333         }
 334
 335         X11DRV_cptable[pfo->fi->cptable].pDrawText( pfo, gdi_display,
 336                 physDev->drawable, physDev->gc,
 337                 physDev->org.x + x, physDev->org.y + y, items, pitem - items );
 338         HeapFree( GetProcessHeap(), 0, items );
 339       }
 340     }
 341     else /* rotated */
 342     {
 343       /* have to render character by character. */
 344       double offset = 0.0;
 345       int i;
 346
 347       for (i=0; i<count; i++)
 348       {
 349         int char_metric_offset = str2b[i].byte2 + (str2b[i].byte1 << 8)
 350           - font->min_char_or_byte2;
 351         int x_i = IROUND((double) (physDev->org.x + x) + offset *
 352                          pfo->lpX11Trans->a / pfo->lpX11Trans->pixelsize );
 353         int y_i = IROUND((double) (physDev->org.y + y) - offset *
 354                          pfo->lpX11Trans->b / pfo->lpX11Trans->pixelsize );
 355
 356         X11DRV_cptable[pfo->fi->cptable].pDrawString(
 357                 pfo, gdi_display, physDev->drawable, physDev->gc,
 358                 x_i, y_i, &str2b[i], 1);
 359         if (lpDx)
 360         {
 361           offset += INTERNAL_XWSTODS(dc, lpDx[i]);
 362         }
 363         else
 364         {
 365           offset += (double) (font->per_char ?
 366                               font->per_char[char_metric_offset].attributes:
 367                               font->min_bounds.attributes)
 368                           * pfo->lpX11Trans->pixelsize / 1000.0;
 369           offset += dc->charExtra;
 370           if (str2b[i].byte2 == (char)dfBreakChar)
 371             offset += dc->breakExtra;
 372         }
 373       }
 374     }
 375     HeapFree( GetProcessHeap(), 0, str2b );
 376
 377       /* Draw underline and strike-out if needed */
 378
 379     if (lfUnderline)
 380     {
 381         long linePos, lineWidth;
 382
 383         if (!TSXGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
 384             linePos = descent - 1;
 385         if (!TSXGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
 386             lineWidth = 0;
 387         else if (lineWidth == 1) lineWidth = 0;
 388         TSXSetLineAttributes( gdi_display, physDev->gc, lineWidth,
 389                               LineSolid, CapRound, JoinBevel );
 390         TSXDrawLine( gdi_display, physDev->drawable, physDev->gc,
 391                      physDev->org.x + x, physDev->org.y + y + linePos,
 392                      physDev->org.x + x + width, physDev->org.y + y + linePos );
 393     }
 394     if (lfStrikeOut)
 395     {
 396         long lineAscent, lineDescent;
 397         if (!TSXGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
 398             lineAscent = ascent / 2;
 399         if (!TSXGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
 400             lineDescent = -lineAscent * 2 / 3;
 401         TSXSetLineAttributes( gdi_display, physDev->gc, lineAscent + lineDescent,
 402                             LineSolid, CapRound, JoinBevel );
 403         TSXDrawLine( gdi_display, physDev->drawable, physDev->gc,
 404                      physDev->org.x + x, physDev->org.y + y - lineAscent,
 405                      physDev->org.x + x + width, physDev->org.y + y - lineAscent );
 406     }
 407
 408     if (flags & ETO_CLIPPED) RestoreVisRgn16( HDC_16(dc->hSelf) );
 409     goto END;
 410
 411 FAIL:
 412     if(str2b != NULL) HeapFree( GetProcessHeap(), 0, str2b );
 413     result = FALSE;
 414
 415 END:
 416     if (dibUpdateFlag) X11DRV_UnlockDIBSection( physDev, TRUE );
 417     return result;
 418 }
 419
 420
 421 /***********************************************************************
 422  *           X11DRV_GetTextExtentPoint
 423  */
 424 BOOL X11DRV_GetTextExtentPoint( X11DRV_PDEVICE *physDev, LPCWSTR str, INT count,
 425                                   LPSIZE size )
 426 {
 427     DC *dc = physDev->dc;
 428     fontObject* pfo = XFONT_GetFontObject( physDev->font );
 429
 430     TRACE("%s %d\n", debugstr_wn(str,count), count);
 431     if( pfo ) {
 432         XChar2b *p = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, str, count );
 433         if (!p) return FALSE;
 434         if( !pfo->lpX11Trans ) {
 435             int dir, ascent, descent;
 436             int info_width;
 437             X11DRV_cptable[pfo->fi->cptable].pTextExtents( pfo, p,
 438                                 count, &dir, &ascent, &descent, &info_width );
 439
 440           size->cx = fabs((FLOAT)(info_width + dc->breakRem + count *
 441                                   dc->charExtra) * dc->xformVport2World.eM11);
 442           size->cy = fabs((FLOAT)(pfo->fs->ascent + pfo->fs->descent) *
 443                           dc->xformVport2World.eM22);
 444         } else {
 445             INT i;
 446             float x = 0.0, y = 0.0;
 447             /* FIXME: Deal with *_char_or_byte2 != 0 situations */
 448             for(i = 0; i < count; i++) {
 449                 x += pfo->fs->per_char ?
 450            pfo->fs->per_char[p[i].byte2 - pfo->fs->min_char_or_byte2].attributes :
 451            pfo->fs->min_bounds.attributes;
 452             }
 453             y = pfo->lpX11Trans->RAW_ASCENT + pfo->lpX11Trans->RAW_DESCENT;
 454             TRACE("x = %f y = %f\n", x, y);
 455             x *= pfo->lpX11Trans->pixelsize / 1000.0;
 456             y *= pfo->lpX11Trans->pixelsize / 1000.0;
 457             size->cx = fabs((x + dc->breakRem + count * dc->charExtra) *
 458                             dc->xformVport2World.eM11);
 459             size->cy = fabs(y * dc->xformVport2World.eM22);
 460         }
 461         size->cx *= pfo->rescale;
 462         size->cy *= pfo->rescale;
 463         HeapFree( GetProcessHeap(), 0, p );
 464         return TRUE;
 465     }
 466     return FALSE;
 467 }