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 "x11font.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(text);
  33
  34 #define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
  35
  36
  37 /***********************************************************************
  38  *           X11DRV_ExtTextOut
  39  */
  40 BOOL CDECL
  41 X11DRV_ExtTextOut( X11DRV_PDEVICE *physDev, INT x, INT y, UINT flags,
  42                    const RECT *lprect, LPCWSTR wstr, UINT count,
  43                    const INT *lpDx )
  44 {
  45     unsigned int i;
  46     fontObject*         pfo;
  47     XFontStruct*        font;
  48     BOOL                rotated = FALSE;
  49     XChar2b             *str2b = NULL;
  50     BOOL                dibUpdateFlag = FALSE;
  51     BOOL                result = TRUE;
  52     HRGN                saved_region = 0;
  53
  54     if(physDev->has_gdi_font)
  55         return X11DRV_XRender_ExtTextOut(physDev, x, y, flags, lprect, wstr, count, lpDx);
  56
  57     if (!X11DRV_SetupGCForText( physDev )) return TRUE;
  58
  59     pfo = XFONT_GetFontObject( physDev->font );
  60     font = pfo->fs;
  61
  62     if (pfo->lf.lfEscapement && pfo->lpX11Trans)
  63         rotated = TRUE;
  64
  65     TRACE("hdc=%p df=%04x %d,%d rc %s %s, %d  flags=%d lpDx=%p\n",
  66           physDev->hdc, (UINT16)physDev->font, x, y, wine_dbgstr_rect(lprect),
  67           debugstr_wn (wstr, count), count, flags, lpDx);
  68
  69       /* Draw the rectangle */
  70
  71     if (flags & ETO_OPAQUE)
  72     {
  73         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod );
  74         dibUpdateFlag = TRUE;
  75         wine_tsx11_lock();
  76         XSetForeground( gdi_display, physDev->gc, physDev->backgroundPixel );
  77         XFillRectangle( gdi_display, physDev->drawable, physDev->gc,
  78                         physDev->dc_rect.left + lprect->left, physDev->dc_rect.top + lprect->top,
  79                         lprect->right - lprect->left, lprect->bottom - lprect->top );
  80         wine_tsx11_unlock();
  81     }
  82     if (!count) goto END;  /* Nothing more to do */
  83
  84
  85       /* Set the clip region */
  86
  87     if (flags & ETO_CLIPPED)
  88     {
  89         HRGN clip_region;
  90
  91         clip_region = CreateRectRgnIndirect( lprect );
  92         /* make a copy of the current device region */
  93         saved_region = CreateRectRgn( 0, 0, 0, 0 );
  94         CombineRgn( saved_region, physDev->region, 0, RGN_COPY );
  95         X11DRV_SetDeviceClipping( physDev, saved_region, clip_region );
  96         DeleteObject( clip_region );
  97     }
  98
  99       /* Draw the text background if necessary */
 100
 101     if (!dibUpdateFlag)
 102     {
 103         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod );
 104         dibUpdateFlag = TRUE;
 105     }
 106
 107
 108     /* Draw the text (count > 0 verified) */
 109     if (!(str2b = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, wstr, count )))
 110         goto FAIL;
 111
 112     wine_tsx11_lock();
 113     XSetForeground( gdi_display, physDev->gc, physDev->textPixel );
 114     wine_tsx11_unlock();
 115     if(!rotated)
 116     {
 117         if (!lpDx)
 118         {
 119             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 120                            pfo, gdi_display, physDev->drawable, physDev->gc,
 121                            physDev->dc_rect.left + x, physDev->dc_rect.top + y, str2b, count );
 122         }
 123         else
 124         {
 125             XTextItem16 *items;
 126
 127             items = HeapAlloc( GetProcessHeap(), 0, count * sizeof(XTextItem16) );
 128             if(items == NULL) goto FAIL;
 129
 130             items[0].chars = str2b;
 131             items[0].delta = 0;
 132             items[0].nchars = 1;
 133             items[0].font = None;
 134             for(i = 1; i < count; i++)
 135             {
 136                 items[i].chars  = str2b + i;
 137                 items[i].delta  = (flags & ETO_PDY) ? lpDx[(i - 1) * 2] : lpDx[i - 1];
 138                 items[i].delta -= X11DRV_cptable[pfo->fi->cptable].pTextWidth( pfo, str2b + i - 1, 1 );
 139                 items[i].nchars = 1;
 140                 items[i].font   = None;
 141             }
 142             X11DRV_cptable[pfo->fi->cptable].pDrawText( pfo, gdi_display,
 143                                   physDev->drawable, physDev->gc,
 144                                   physDev->dc_rect.left + x, physDev->dc_rect.top + y, items, count );
 145             HeapFree( GetProcessHeap(), 0, items );
 146         }
 147     }
 148     else /* rotated */
 149     {
 150         /* have to render character by character. */
 151         double offset = 0.0;
 152         UINT i;
 153
 154         for (i=0; i<count; i++)
 155         {
 156             int char_metric_offset = str2b[i].byte2 + (str2b[i].byte1 << 8)
 157                 - font->min_char_or_byte2;
 158             int x_i = IROUND((double) (physDev->dc_rect.left + x) + offset *
 159                              pfo->lpX11Trans->a / pfo->lpX11Trans->pixelsize );
 160             int y_i = IROUND((double) (physDev->dc_rect.top + y) - offset *
 161                              pfo->lpX11Trans->b / pfo->lpX11Trans->pixelsize );
 162
 163             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 164                                     pfo, gdi_display, physDev->drawable, physDev->gc,
 165                                     x_i, y_i, &str2b[i], 1);
 166             if (lpDx)
 167             {
 168                 offset += (flags & ETO_PDY) ? lpDx[i * 2] : lpDx[i];
 169             }
 170             else
 171             {
 172                 offset += (double) (font->per_char ?
 173                                     font->per_char[char_metric_offset].attributes:
 174                                     font->min_bounds.attributes)
 175                     * pfo->lpX11Trans->pixelsize / 1000.0;
 176             }
 177         }
 178     }
 179     HeapFree( GetProcessHeap(), 0, str2b );
 180
 181     if (flags & ETO_CLIPPED)
 182     {
 183         /* restore the device region */
 184         X11DRV_SetDeviceClipping( physDev, saved_region, 0 );
 185         DeleteObject( saved_region );
 186     }
 187     goto END;
 188
 189 FAIL:
 190     HeapFree( GetProcessHeap(), 0, str2b );
 191     result = FALSE;
 192
 193 END:
 194     if (dibUpdateFlag) X11DRV_UnlockDIBSection( physDev, TRUE );
 195     return result;
 196 }
 197
 198
 199 /***********************************************************************
 200  *           X11DRV_GetTextExtentExPoint
 201  */
 202 BOOL CDECL X11DRV_GetTextExtentExPoint( X11DRV_PDEVICE *physDev, LPCWSTR str, INT count,
 203                                         INT maxExt, LPINT lpnFit, LPINT alpDx, LPSIZE size )
 204 {
 205     fontObject* pfo = XFONT_GetFontObject( physDev->font );
 206
 207     TRACE("%s %d\n", debugstr_wn(str,count), count);
 208     if( pfo ) {
 209         XChar2b *p = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, str, count );
 210         if (!p) return FALSE;
 211         if( !pfo->lpX11Trans ) {
 212             int dir, ascent, descent;
 213             int info_width;
 214             X11DRV_cptable[pfo->fi->cptable].pTextExtents( pfo, p,
 215                                 count, &dir, &ascent, &descent, &info_width,
 216                                 maxExt, lpnFit, alpDx );
 217
 218           size->cx = info_width;
 219           size->cy = pfo->fs->ascent + pfo->fs->descent;
 220         } else {
 221             INT i;
 222             INT nfit = 0;
 223             float x = 0.0, y = 0.0;
 224             float scaled_x = 0.0, pixsize = pfo->lpX11Trans->pixelsize;
 225             /* FIXME: Deal with *_char_or_byte2 != 0 situations */
 226             for(i = 0; i < count; i++) {
 227                 x += pfo->fs->per_char ?
 228            pfo->fs->per_char[p[i].byte2 - pfo->fs->min_char_or_byte2].attributes :
 229            pfo->fs->min_bounds.attributes;
 230                 scaled_x = x * pixsize / 1000.0;
 231                 if (alpDx)
 232                     alpDx[i] = scaled_x;
 233                 if (scaled_x <= maxExt)
 234                     ++nfit;
 235             }
 236             y = pfo->lpX11Trans->RAW_ASCENT + pfo->lpX11Trans->RAW_DESCENT;
 237             TRACE("x = %f y = %f\n", x, y);
 238             size->cx = x * pfo->lpX11Trans->pixelsize / 1000.0;
 239             size->cy = y * pfo->lpX11Trans->pixelsize / 1000.0;
 240             if (lpnFit)
 241                 *lpnFit = nfit;
 242         }
 243         size->cx *= pfo->rescale;
 244         size->cy *= pfo->rescale;
 245         HeapFree( GetProcessHeap(), 0, p );
 246         return TRUE;
 247     }
 248     return FALSE;
 249 }