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 SWAP_INT(a,b)  { int t = a; a = b; b = t; }
  35 #define IROUND(x) (int)((x)>0? (x)+0.5 : (x) - 0.5)
  36
  37
  38 /***********************************************************************
  39  *           X11DRV_ExtTextOut
  40  */
  41 BOOL
  42 X11DRV_ExtTextOut( X11DRV_PDEVICE *physDev, INT x, INT y, UINT flags,
  43                    const RECT *lprect, LPCWSTR wstr, UINT count,
  44                    const INT *lpDx )
  45 {
  46     unsigned int i;
  47     fontObject*         pfo;
  48     XFontStruct*        font;
  49     BOOL                rotated = FALSE;
  50     XChar2b             *str2b = NULL;
  51     BOOL                dibUpdateFlag = FALSE;
  52     BOOL                result = TRUE;
  53     HRGN                saved_region = 0;
  54
  55     if(physDev->has_gdi_font)
  56         return X11DRV_XRender_ExtTextOut(physDev, x, y, flags, lprect, wstr, count, lpDx);
  57
  58     if (!X11DRV_SetupGCForText( physDev )) return TRUE;
  59
  60     pfo = XFONT_GetFontObject( physDev->font );
  61     font = pfo->fs;
  62
  63     if (pfo->lf.lfEscapement && pfo->lpX11Trans)
  64         rotated = TRUE;
  65
  66     TRACE("hdc=%p df=%04x %d,%d %s, %d  flags=%d lpDx=%p\n",
  67           physDev->hdc, (UINT16)(physDev->font), x, y,
  68           debugstr_wn (wstr, count), count, flags, lpDx);
  69
  70     if (lprect != NULL) TRACE("\trect=(%d,%d - %d,%d)\n",
  71                                      lprect->left, lprect->top,
  72                                      lprect->right, lprect->bottom );
  73
  74       /* Draw the rectangle */
  75
  76     if (flags & ETO_OPAQUE)
  77     {
  78         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
  79         dibUpdateFlag = TRUE;
  80         wine_tsx11_lock();
  81         XSetForeground( gdi_display, physDev->gc, physDev->backgroundPixel );
  82         XFillRectangle( gdi_display, physDev->drawable, physDev->gc,
  83                         physDev->dc_rect.left + lprect->left, physDev->dc_rect.top + lprect->top,
  84                         lprect->right - lprect->left, lprect->bottom - lprect->top );
  85         wine_tsx11_unlock();
  86     }
  87     if (!count) goto END;  /* Nothing more to do */
  88
  89
  90       /* Set the clip region */
  91
  92     if (flags & ETO_CLIPPED)
  93     {
  94         HRGN clip_region;
  95
  96         clip_region = CreateRectRgnIndirect( lprect );
  97         /* make a copy of the current device region */
  98         saved_region = CreateRectRgn( 0, 0, 0, 0 );
  99         CombineRgn( saved_region, physDev->region, 0, RGN_COPY );
 100         X11DRV_SetDeviceClipping( physDev, saved_region, clip_region );
 101         DeleteObject( clip_region );
 102     }
 103
 104       /* Draw the text background if necessary */
 105
 106     if (!dibUpdateFlag)
 107     {
 108         X11DRV_LockDIBSection( physDev, DIB_Status_GdiMod, FALSE );
 109         dibUpdateFlag = TRUE;
 110     }
 111
 112
 113     /* Draw the text (count > 0 verified) */
 114     if (!(str2b = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, wstr, count )))
 115         goto FAIL;
 116
 117     wine_tsx11_lock();
 118     XSetForeground( gdi_display, physDev->gc, physDev->textPixel );
 119     wine_tsx11_unlock();
 120     if(!rotated)
 121     {
 122         if (!lpDx)
 123         {
 124             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 125                            pfo, gdi_display, physDev->drawable, physDev->gc,
 126                            physDev->dc_rect.left + x, physDev->dc_rect.top + y, str2b, count );
 127         }
 128         else
 129         {
 130             XTextItem16 *items, *pitem;
 131
 132             pitem = items = HeapAlloc( GetProcessHeap(), 0,
 133                                        count * sizeof(XTextItem16) );
 134             if(items == NULL) goto FAIL;
 135
 136             for(i = 0; i < count; i++)
 137             {
 138                 pitem->chars  = str2b + i;
 139                 pitem->delta  = lpDx[i];
 140                 pitem->nchars = 1;
 141                 pitem->font   = None;
 142                 pitem++;
 143             }
 144
 145             X11DRV_cptable[pfo->fi->cptable].pDrawText( pfo, gdi_display,
 146                                   physDev->drawable, physDev->gc,
 147                                   physDev->dc_rect.left + x, physDev->dc_rect.top + y, items, pitem - items );
 148             HeapFree( GetProcessHeap(), 0, items );
 149         }
 150     }
 151     else /* rotated */
 152     {
 153         /* have to render character by character. */
 154         double offset = 0.0;
 155         int i;
 156
 157         for (i=0; i<count; i++)
 158         {
 159             int char_metric_offset = str2b[i].byte2 + (str2b[i].byte1 << 8)
 160                 - font->min_char_or_byte2;
 161             int x_i = IROUND((double) (physDev->dc_rect.left + x) + offset *
 162                              pfo->lpX11Trans->a / pfo->lpX11Trans->pixelsize );
 163             int y_i = IROUND((double) (physDev->dc_rect.top + y) - offset *
 164                              pfo->lpX11Trans->b / pfo->lpX11Trans->pixelsize );
 165
 166             X11DRV_cptable[pfo->fi->cptable].pDrawString(
 167                                     pfo, gdi_display, physDev->drawable, physDev->gc,
 168                                     x_i, y_i, &str2b[i], 1);
 169             if (lpDx)
 170             {
 171                 offset += lpDx[i];
 172             }
 173             else
 174             {
 175                 offset += (double) (font->per_char ?
 176                                     font->per_char[char_metric_offset].attributes:
 177                                     font->min_bounds.attributes)
 178                     * pfo->lpX11Trans->pixelsize / 1000.0;
 179             }
 180         }
 181     }
 182     HeapFree( GetProcessHeap(), 0, str2b );
 183
 184     if (flags & ETO_CLIPPED)
 185     {
 186         /* restore the device region */
 187         X11DRV_SetDeviceClipping( physDev, saved_region, 0 );
 188         DeleteObject( saved_region );
 189     }
 190     goto END;
 191
 192 FAIL:
 193     HeapFree( GetProcessHeap(), 0, str2b );
 194     result = FALSE;
 195
 196 END:
 197     if (dibUpdateFlag) X11DRV_UnlockDIBSection( physDev, TRUE );
 198     return result;
 199 }
 200
 201
 202 /***********************************************************************
 203  *           X11DRV_GetTextExtentExPoint
 204  */
 205 BOOL X11DRV_GetTextExtentExPoint( X11DRV_PDEVICE *physDev, LPCWSTR str, INT count,
 206                                   INT maxExt, LPINT lpnFit, LPINT alpDx, LPSIZE size )
 207 {
 208     fontObject* pfo = XFONT_GetFontObject( physDev->font );
 209
 210     TRACE("%s %d\n", debugstr_wn(str,count), count);
 211     if( pfo ) {
 212         XChar2b *p = X11DRV_cptable[pfo->fi->cptable].punicode_to_char2b( pfo, str, count );
 213         if (!p) return FALSE;
 214         if( !pfo->lpX11Trans ) {
 215             int dir, ascent, descent;
 216             int info_width;
 217             X11DRV_cptable[pfo->fi->cptable].pTextExtents( pfo, p,
 218                                 count, &dir, &ascent, &descent, &info_width,
 219                                 maxExt, lpnFit, alpDx );
 220
 221           size->cx = info_width;
 222           size->cy = pfo->fs->ascent + pfo->fs->descent;
 223         } else {
 224             INT i;
 225             INT nfit = 0;
 226             float x = 0.0, y = 0.0;
 227             float scaled_x = 0.0, pixsize = pfo->lpX11Trans->pixelsize;
 228             /* FIXME: Deal with *_char_or_byte2 != 0 situations */
 229             for(i = 0; i < count; i++) {
 230                 x += pfo->fs->per_char ?
 231            pfo->fs->per_char[p[i].byte2 - pfo->fs->min_char_or_byte2].attributes :
 232            pfo->fs->min_bounds.attributes;
 233                 scaled_x = x * pixsize / 1000.0;
 234                 if (alpDx)
 235                     alpDx[i] = scaled_x;
 236                 if (scaled_x <= maxExt)
 237                     ++nfit;
 238             }
 239             y = pfo->lpX11Trans->RAW_ASCENT + pfo->lpX11Trans->RAW_DESCENT;
 240             TRACE("x = %f y = %f\n", x, y);
 241             size->cx = x * pfo->lpX11Trans->pixelsize / 1000.0;
 242             size->cy = y * pfo->lpX11Trans->pixelsize / 1000.0;
 243             if (lpnFit)
 244                 *lpnFit = nfit;
 245         }
 246         size->cx *= pfo->rescale;
 247         size->cy *= pfo->rescale;
 248         HeapFree( GetProcessHeap(), 0, p );
 249         return TRUE;
 250     }
 251     return FALSE;
 252 }