graphics/x11drv/text.c

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