dlls/winex11.drv/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24 #include <stdlib.h>
  25 #include <math.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "winnls.h"
  30 #include "x11font.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(text);
  34
  35 #define SWAP_INT(a,b)  { int t = a; a = b; b = t; }
  36 #define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
  37
  38
  39 /***********************************************************************
  40  *           X11DRV_ExtTextOut
  41  */
  42 BOOL
  43 X11DRV_ExtTextOut( X11DRV_PDEVICE *physDev, INT x, INT y, UINT flags,
  44                    const RECT *lprect, LPCWSTR wstr, UINT count,
  45                    const INT *lpDx )
  46 {
  47     unsigned int i;
  48     fontObject*         pfo;
  49     XFontStruct*        font;
  50     BOOL                rotated = FALSE;
  51     XChar2b             *str2b = NULL;
  52     BOOL                dibUpdateFlag = FALSE;
  53     BOOL                result = TRUE;
  54     HRGN                saved_region = 0;
  55
  56     if(physDev->has_gdi_font)
  57         return X11DRV_XRender_ExtTextOut(physDev, x, y, flags, lprect, wstr, count, lpDx);
  58
  59     if (!X11DRV_SetupGCForText( physDev )) return TRUE;
  60
  61     pfo = XFONT_GetFontObject( physDev->font );
  62     font = pfo->fs;
  63
  64     if (pfo->lf.lfEscapement && pfo->lpX11Trans)
  65         rotated = TRUE;
  66
  67     TRACE("hdc=%p df=%04x %d,%d %s, %d  flags=%d lpDx=%p\n",
  68           physDev->hdc, (UINT16)(physDev->font), x, y,
  69           debugstr_wn (wstr, count), count, flags, lpDx);
  70
  71     if (lprect != NULL) TRACE("\trect=(%ld,%ld - %ld,%ld)\n",
  72                                      lprect->left, lprect->top,
  73                                      lprect->right, lprect->bottom );
  74
  75       /* Draw the rectangle */
  76
  77     if (flags & ETO_OPAQUE)
  78     {
  79         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
  80         dibUpdateFlag = TRUE;
  81         wine_tsx11_lock();
  82         XSetForeground( gdi_display, physDev->gc, physDev->backgroundPixel );
  83         XFillRectangle( gdi_display, physDev->drawable, physDev->gc,
  84                         physDev->org.x + lprect->left, physDev->org.y + lprect->top,
  85                         lprect->right - lprect->left, lprect->bottom - lprect->top );
  86         wine_tsx11_unlock();
  87     }
  88     if (!count) goto END;  /* Nothing more to do */
  89
  90
  91       /* Set the clip region */
  92
  93     if (flags & ETO_CLIPPED)
  94     {
  95         HRGN clip_region;
  96
  97         clip_region = CreateRectRgnIndirect( lprect );
  98         /* make a copy of the current device region */
  99         saved_region = CreateRectRgn( 0, 0, 0, 0 );
 100         CombineRgn( saved_region, physDev->region, 0, RGN_COPY );
 101         X11DRV_SetDeviceClipping( physDev, saved_region, clip_region );
 102         DeleteObject( clip_region );
 103     }
 104
 105       /* Draw the text background if necessary */
 106
 107     if (!dibUpdateFlag)
 108     {
 109         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
 110         dibUpdateFlag = TRUE;
 111     }
 112
 113
 114     /* Draw the text (count > 0 verified) */
 115     if (!(str2b = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, wstr, count )))
 116         goto FAIL;
 117
 118     wine_tsx11_lock();
 119     XSetForeground( gdi_display, physDev->gc, physDev->textPixel );
 120     wine_tsx11_unlock();
 121     if(!rotated)
 122     {
 123         if (!lpDx)
 124         {
 125             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 126                            pfo, gdi_display, physDev->drawable, physDev->gc,
 127                            physDev->org.x + x, physDev->org.y + y, str2b, count );
 128         }
 129         else
 130         {
 131             XTextItem16 *items, *pitem;
 132
 133             pitem = items = HeapAlloc( GetProcessHeap(), 0,
 134                                        count * sizeof(XTextItem16) );
 135             if(items == NULL) goto FAIL;
 136
 137             for(i = 0; i < count; i++)
 138             {
 139                 pitem->chars  = str2b + i;
 140                 pitem->delta  = lpDx[i];
 141                 pitem->nchars = 1;
 142                 pitem->font   = None;
 143                 pitem++;
 144             }
 145
 146             X11DRV_cptable[pfo->fi->cptable].pDrawText( pfo, gdi_display,
 147                                   physDev->drawable, physDev->gc,
 148                                   physDev->org.x + x, physDev->org.y + y, items, pitem - items );
 149             HeapFree( GetProcessHeap(), 0, items );
 150         }
 151     }
 152     else /* rotated */
 153     {
 154         /* have to render character by character. */
 155         double offset = 0.0;
 156         int i;
 157
 158         for (i=0; i<count; i++)
 159         {
 160             int char_metric_offset = str2b[i].byte2 + (str2b[i].byte1 << 8)
 161                 - font->min_char_or_byte2;
 162             int x_i = IROUND((double) (physDev->org.x + x) + offset *
 163                              pfo->lpX11Trans->a / pfo->lpX11Trans->pixelsize );
 164             int y_i = IROUND((double) (physDev->org.y + y) - offset *
 165                              pfo->lpX11Trans->b / pfo->lpX11Trans->pixelsize );
 166
 167             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 168                                     pfo, gdi_display, physDev->drawable, physDev->gc,
 169                                     x_i, y_i, &str2b[i], 1);
 170             if (lpDx)
 171             {
 172                 offset += lpDx[i];
 173             }
 174             else
 175             {
 176                 offset += (double) (font->per_char ?
 177                                     font->per_char[char_metric_offset].attributes:
 178                                     font->min_bounds.attributes)
 179                     * pfo->lpX11Trans->pixelsize / 1000.0;
 180             }
 181         }
 182     }
 183     HeapFree( GetProcessHeap(), 0, str2b );
 184
 185     if (flags & ETO_CLIPPED)
 186     {
 187         /* restore the device region */
 188         X11DRV_SetDeviceClipping( physDev, saved_region, 0 );
 189         DeleteObject( saved_region );
 190     }
 191     goto END;
 192
 193 FAIL:
 194     HeapFree( GetProcessHeap(), 0, str2b );
 195     result = FALSE;
 196
 197 END:
 198     if (dibUpdateFlag) X11DRV_UnlockDIBSection( physDev, TRUE );
 199     return result;
 200 }
 201
 202
 203 /***********************************************************************
 204  *           X11DRV_GetTextExtentPoint
 205  */
 206 BOOL X11DRV_GetTextExtentPoint( X11DRV_PDEVICE *physDev, LPCWSTR str, INT count,
 207                                   LPSIZE size )
 208 {
 209     fontObject* pfo = XFONT_GetFontObject( physDev->font );
 210
 211     TRACE("%s %d\n", debugstr_wn(str,count), count);
 212     if( pfo ) {
 213         XChar2b *p = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, str, count );
 214         if (!p) return FALSE;
 215         if( !pfo->lpX11Trans ) {
 216             int dir, ascent, descent;
 217             int info_width;
 218             X11DRV_cptable[pfo->fi->cptable].pTextExtents( pfo, p,
 219                                 count, &dir, &ascent, &descent, &info_width );
 220
 221           size->cx = info_width;
 222           size->cy = pfo->fs->ascent + pfo->fs->descent;
 223         } else {
 224             INT i;
 225             float x = 0.0, y = 0.0;
 226             /* FIXME: Deal with *_char_or_byte2 != 0 situations */
 227             for(i = 0; i < count; i++) {
 228                 x += pfo->fs->per_char ?
 229            pfo->fs->per_char[p[i].byte2 - pfo->fs->min_char_or_byte2].attributes :
 230            pfo->fs->min_bounds.attributes;
 231             }
 232             y = pfo->lpX11Trans->RAW_ASCENT + pfo->lpX11Trans->RAW_DESCENT;
 233             TRACE("x = %f y = %f\n", x, y);
 234             size->cx = x * pfo->lpX11Trans->pixelsize / 1000.0;
 235             size->cy = y * pfo->lpX11Trans->pixelsize / 1000.0;
 236         }
 237         size->cx *= pfo->rescale;
 238         size->cy *= pfo->rescale;
 239         HeapFree( GetProcessHeap(), 0, p );
 240         return TRUE;
 241     }
 242     return FALSE;
 243 }