graphics/x11drv/text.c

   1 /*
   2  * X11 graphics driver text functions
   3  *
   4  * Copyright 1993,1994 Alexandre Julliard
   5  */
   6
   7 #include <stdlib.h>
   8 #include "ts_xlib.h"
   9 #include <X11/Xatom.h>
  10 #include "windows.h"
  11 #include <math.h>
  12 #include "dc.h"
  13 #include "gdi.h"
  14 /*#include "callback.h"*/
  15 #include "heap.h"
  16 #include "x11font.h"
  17 #include "debugstr.h"
  18 #include "debug.h"
  19
  20 #define SWAP_INT(a,b)  { int t = a; a = b; b = t; }
  21 #define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
  22
  23 /***********************************************************************
  24  *           X11DRV_ExtTextOut
  25  */
  26 BOOL32
  27 X11DRV_ExtTextOut( DC *dc, INT32 x, INT32 y, UINT32 flags,
  28                    const RECT32 *lprect, LPCSTR str, UINT32 count,
  29                    const INT32 *lpDx )
  30 {
  31     int                 i;
  32     fontObject*         pfo;
  33     INT32               width, ascent, descent, xwidth, ywidth;
  34     XFontStruct*        font;
  35     RECT32              rect;
  36     char                dfBreakChar, lfUnderline, lfStrikeOut;
  37     BOOL32              rotated = FALSE;
  38     X11DRV_PDEVICE      *physDev = (X11DRV_PDEVICE *)dc->physDev;
  39
  40     if (!X11DRV_SetupGCForText( dc )) return TRUE;
  41
  42     pfo = XFONT_GetFontObject( physDev->font );
  43     font = pfo->fs;
  44
  45     if (pfo->lf.lfEscapement && pfo->lpX11Trans)
  46         rotated = TRUE;
  47     dfBreakChar = (char)pfo->fi->df.dfBreakChar;
  48     lfUnderline = (pfo->fo_flags & FO_SYNTH_UNDERLINE) ? 1 : 0;
  49     lfStrikeOut = (pfo->fo_flags & FO_SYNTH_STRIKEOUT) ? 1 : 0;
  50
  51     TRACE(text,"hdc=%04x df=%04x %d,%d %s, %d  flags=%d lpDx=%p\n",
  52           dc->hSelf, (UINT16)(physDev->font), x, y,
  53           debugstr_an (str, count), count, flags, lpDx);
  54
  55     /* some strings sent here end in a newline for whatever reason.  I have no
  56        clue what the right treatment should be in general, but ignoring
  57        terminating newlines seems ok.  MW, April 1998.  */
  58     if (count > 0 && str[count - 1] == '\n') count--;
  59
  60     if (lprect != NULL) TRACE(text, "\trect=(%d,%d - %d,%d)\n",
  61                                      lprect->left, lprect->top,
  62                                      lprect->right, lprect->bottom );
  63       /* Setup coordinates */
  64
  65     if (dc->w.textAlign & TA_UPDATECP)
  66     {
  67         x = dc->w.CursPosX;
  68         y = dc->w.CursPosY;
  69     }
  70
  71     if (flags & (ETO_OPAQUE | ETO_CLIPPED))  /* there's a rectangle */
  72     {
  73         if (!lprect)  /* not always */
  74         {
  75             SIZE32 sz;
  76             if (flags & ETO_CLIPPED)  /* Can't clip with no rectangle */
  77               return FALSE;
  78             if (!X11DRV_GetTextExtentPoint( dc, str, count, &sz ))
  79               return FALSE;
  80             rect.left   = XLPTODP( dc, x );
  81             rect.right  = XLPTODP( dc, x+sz.cx );
  82             rect.top    = YLPTODP( dc, y );
  83             rect.bottom = YLPTODP( dc, y+sz.cy );
  84         }
  85         else
  86         {
  87             rect.left   = XLPTODP( dc, lprect->left );
  88             rect.right  = XLPTODP( dc, lprect->right );
  89             rect.top    = YLPTODP( dc, lprect->top );
  90             rect.bottom = YLPTODP( dc, lprect->bottom );
  91         }
  92         if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
  93         if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
  94     }
  95
  96     x = XLPTODP( dc, x );
  97     y = YLPTODP( dc, y );
  98
  99     TRACE(text,"\treal coord: x=%i, y=%i, rect=(%d,%d - %d,%d)\n",
 100                           x, y, rect.left, rect.top, rect.right, rect.bottom);
 101
 102       /* Draw the rectangle */
 103
 104     if (flags & ETO_OPAQUE)
 105     {
 106         TSXSetForeground( display, physDev->gc, physDev->backgroundPixel );
 107         TSXFillRectangle( display, physDev->drawable, physDev->gc,
 108                         dc->w.DCOrgX + rect.left, dc->w.DCOrgY + rect.top,
 109                         rect.right-rect.left, rect.bottom-rect.top );
 110     }
 111     if (!count) return TRUE;  /* Nothing more to do */
 112
 113       /* Compute text starting position */
 114
 115     if (lpDx) /* have explicit character cell x offsets in logical coordinates */
 116     {
 117         int extra = dc->wndExtX / 2;
 118         for (i = width = 0; i < count; i++) width += lpDx[i];
 119         width = (width * dc->vportExtX + extra ) / dc->wndExtX;
 120     }
 121     else
 122     {
 123         SIZE32 sz;
 124         if (!X11DRV_GetTextExtentPoint( dc, str, count, &sz ))
 125             return FALSE;
 126         width = XLSTODS(dc, sz.cx);
 127     }
 128     ascent = pfo->lpX11Trans ? pfo->lpX11Trans->ascent : font->ascent;
 129     descent = pfo->lpX11Trans ? pfo->lpX11Trans->descent : font->descent;
 130     xwidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->a /
 131       pfo->lpX11Trans->pixelsize : width;
 132     ywidth = pfo->lpX11Trans ? width * pfo->lpX11Trans->b /
 133       pfo->lpX11Trans->pixelsize : 0;
 134
 135     switch( dc->w.textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
 136     {
 137       case TA_LEFT:
 138           if (dc->w.textAlign & TA_UPDATECP) {
 139               dc->w.CursPosX = XDPTOLP( dc, x + xwidth );
 140               dc->w.CursPosY = YDPTOLP( dc, y - ywidth );
 141           }
 142           break;
 143       case TA_RIGHT:
 144           x -= xwidth;
 145           y += ywidth;
 146           if (dc->w.textAlign & TA_UPDATECP) {
 147               dc->w.CursPosX = XDPTOLP( dc, x );
 148               dc->w.CursPosY = YDPTOLP( dc, y );
 149           }
 150           break;
 151       case TA_CENTER:
 152           x -= xwidth / 2;
 153           y += ywidth / 2;
 154           break;
 155     }
 156
 157     switch( dc->w.textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
 158     {
 159       case TA_TOP:
 160           x -= pfo->lpX11Trans ? ascent * pfo->lpX11Trans->c /
 161             pfo->lpX11Trans->pixelsize : 0;
 162           y += pfo->lpX11Trans ? ascent * pfo->lpX11Trans->d /
 163             pfo->lpX11Trans->pixelsize : ascent;
 164           break;
 165       case TA_BOTTOM:
 166           x += pfo->lpX11Trans ? descent * pfo->lpX11Trans->c /
 167             pfo->lpX11Trans->pixelsize : 0;
 168           y -= pfo->lpX11Trans ? descent * pfo->lpX11Trans->d /
 169             pfo->lpX11Trans->pixelsize : descent;
 170           break;
 171       case TA_BASELINE:
 172           break;
 173     }
 174
 175       /* Set the clip region */
 176
 177     if (flags & ETO_CLIPPED)
 178     {
 179         SaveVisRgn( dc->hSelf );
 180         CLIPPING_IntersectVisRect( dc, rect.left, rect.top, rect.right,
 181                                    rect.bottom, FALSE );
 182     }
 183
 184       /* Draw the text background if necessary */
 185
 186     if (dc->w.backgroundMode != TRANSPARENT)
 187     {
 188           /* If rectangle is opaque and clipped, do nothing */
 189         if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
 190         {
 191               /* Only draw if rectangle is not opaque or if some */
 192               /* text is outside the rectangle */
 193             if (!(flags & ETO_OPAQUE) ||
 194                 (x < rect.left) ||
 195                 (x + width >= rect.right) ||
 196                 (y - ascent < rect.top) ||
 197                 (y + descent >= rect.bottom))
 198             {
 199                 TSXSetForeground( display, physDev->gc,
 200                                   physDev->backgroundPixel );
 201                 TSXFillRectangle( display, physDev->drawable, physDev->gc,
 202                                 dc->w.DCOrgX + x,
 203                                 dc->w.DCOrgY + y - ascent,
 204                                 width,
 205                                 ascent + descent );
 206             }
 207         }
 208     }
 209
 210     /* Draw the text (count > 0 verified) */
 211
 212     TSXSetForeground( display, physDev->gc, physDev->textPixel );
 213     if (!dc->w.charExtra && !dc->w.breakExtra && !lpDx)
 214     {
 215       if(!rotated)
 216       {
 217         TSXDrawString( display, physDev->drawable, physDev->gc,
 218                      dc->w.DCOrgX + x, dc->w.DCOrgY + y, str, count );
 219       }
 220       else
 221       {
 222         /* have to render character by character. */
 223         double offset = 0.0;
 224         int i;
 225
 226         for(i=0; i<count; i++) {
 227           int char_metric_offset = (unsigned char) str[i]
 228             - font->min_char_or_byte2;
 229           int x_i = IROUND((double) (dc->w.DCOrgX + x) + offset *
 230                            pfo->lpX11Trans->a / 1000.0 );
 231           int y_i = IROUND((double) (dc->w.DCOrgY + y) - offset *
 232                            pfo->lpX11Trans->b / 1000.0 );
 233
 234           TSXDrawString( display, physDev->drawable, physDev->gc,
 235                          x_i, y_i, &str[i], 1);
 236           offset += (double) (font->per_char ?
 237                      font->per_char[char_metric_offset].attributes:
 238                      font->min_bounds.attributes);
 239         }
 240       }
 241     }
 242     else  /* Now the fun begins... */
 243     {
 244         XTextItem *items, *pitem;
 245         int delta;
 246
 247         /* allocate max items */
 248
 249         pitem = items = HEAP_xalloc( GetProcessHeap(), 0,
 250                                      count * sizeof(XTextItem) );
 251         delta = i = 0;
 252         if( lpDx ) /* explicit character widths */
 253         {
 254             int extra = dc->wndExtX / 2;
 255
 256             while (i < count)
 257             {
 258                 /* initialize text item with accumulated delta */
 259
 260                 pitem->chars  = (char *)str + i;
 261                 pitem->delta  = delta;
 262                 pitem->nchars = 0;
 263                 pitem->font   = None;
 264                 delta = 0;
 265
 266                 /* add characters  to the same XTextItem until new delta
 267                  * becomes  non-zero */
 268
 269                 do
 270                 {
 271                     delta += (lpDx[i] * dc->vportExtX + extra) / dc->wndExtX
 272                                             - TSXTextWidth( font, str + i, 1);
 273                     pitem->nchars++;
 274                 } while ((++i < count) && !delta);
 275                 pitem++;
 276            }
 277         }
 278         else /* charExtra or breakExtra */
 279         {
 280             while (i < count)
 281             {
 282                 pitem->chars  = (char *)str + i;
 283                 pitem->delta  = delta;
 284                 pitem->nchars = 0;
 285                 pitem->font   = None;
 286                 delta = 0;
 287
 288                 do
 289                 {
 290                     delta += dc->w.charExtra;
 291                     if (str[i] == (char)dfBreakChar) delta += dc->w.breakExtra;
 292                     pitem->nchars++;
 293                 } while ((++i < count) && !delta);
 294                 pitem++;
 295             }
 296         }
 297
 298         TSXDrawText( display, physDev->drawable, physDev->gc,
 299                    dc->w.DCOrgX + x, dc->w.DCOrgY + y, items, pitem - items );
 300         HeapFree( GetProcessHeap(), 0, items );
 301     }
 302
 303       /* Draw underline and strike-out if needed */
 304
 305     if (lfUnderline)
 306     {
 307         long linePos, lineWidth;
 308
 309         if (!TSXGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
 310             linePos = descent - 1;
 311         if (!TSXGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
 312             lineWidth = 0;
 313         else if (lineWidth == 1) lineWidth = 0;
 314         TSXSetLineAttributes( display, physDev->gc, lineWidth,
 315                               LineSolid, CapRound, JoinBevel );
 316         TSXDrawLine( display, physDev->drawable, physDev->gc,
 317                      dc->w.DCOrgX + x, dc->w.DCOrgY + y + linePos,
 318                      dc->w.DCOrgX + x + width, dc->w.DCOrgY + y + linePos );
 319     }
 320     if (lfStrikeOut)
 321     {
 322         long lineAscent, lineDescent;
 323         if (!TSXGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
 324             lineAscent = ascent / 2;
 325         if (!TSXGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
 326             lineDescent = -lineAscent * 2 / 3;
 327         TSXSetLineAttributes( display, physDev->gc, lineAscent + lineDescent,
 328                             LineSolid, CapRound, JoinBevel );
 329         TSXDrawLine( display, physDev->drawable, physDev->gc,
 330                    dc->w.DCOrgX + x, dc->w.DCOrgY + y - lineAscent,
 331                    dc->w.DCOrgX + x + width, dc->w.DCOrgY + y - lineAscent );
 332     }
 333
 334     if (flags & ETO_CLIPPED)
 335         RestoreVisRgn( dc->hSelf );
 336
 337     return TRUE;
 338 }
 339