Pileus Git - ~andy/gtk/blob - gdk/x11/gdkdrawable-x11.c

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-1999.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gdkprivate-x11.h"
  28
  29 static void    gdk_x11_drawable_destroy   (GdkDrawable     *drawable);
  30
  31 static void gdk_x11_draw_rectangle (GdkDrawable    *drawable,
  32                                     GdkGC          *gc,
  33                                     gint            filled,
  34                                     gint            x,
  35                                     gint            y,
  36                                     gint            width,
  37                                     gint            height);
  38 static void gdk_x11_draw_arc       (GdkDrawable    *drawable,
  39                                     GdkGC          *gc,
  40                                     gint            filled,
  41                                     gint            x,
  42                                     gint            y,
  43                                     gint            width,
  44                                     gint            height,
  45                                     gint            angle1,
  46                                     gint            angle2);
  47 static void gdk_x11_draw_polygon   (GdkDrawable    *drawable,
  48                                     GdkGC          *gc,
  49                                     gint            filled,
  50                                     GdkPoint       *points,
  51                                     gint            npoints);
  52 static void gdk_x11_draw_text      (GdkDrawable    *drawable,
  53                                     GdkFont        *font,
  54                                     GdkGC          *gc,
  55                                     gint            x,
  56                                     gint            y,
  57                                     const gchar    *text,
  58                                     gint            text_length);
  59 static void gdk_x11_draw_text_wc   (GdkDrawable    *drawable,
  60                                     GdkFont        *font,
  61                                     GdkGC          *gc,
  62                                     gint            x,
  63                                     gint            y,
  64                                     const GdkWChar *text,
  65                                     gint            text_length);
  66 static void gdk_x11_draw_drawable  (GdkDrawable    *drawable,
  67                                     GdkGC          *gc,
  68                                     GdkPixmap      *src,
  69                                     gint            xsrc,
  70                                     gint            ysrc,
  71                                     gint            xdest,
  72                                     gint            ydest,
  73                                     gint            width,
  74                                     gint            height);
  75 static void gdk_x11_draw_points    (GdkDrawable    *drawable,
  76                                     GdkGC          *gc,
  77                                     GdkPoint       *points,
  78                                     gint            npoints);
  79 static void gdk_x11_draw_segments  (GdkDrawable    *drawable,
  80                                     GdkGC          *gc,
  81                                     GdkSegment     *segs,
  82                                     gint            nsegs);
  83 static void gdk_x11_draw_lines     (GdkDrawable    *drawable,
  84                                     GdkGC          *gc,
  85                                     GdkPoint       *points,
  86                                     gint            npoints);
  87
  88
  89 GdkDrawableClass _gdk_x11_drawable_class = {
  90   gdk_x11_drawable_destroy,
  91   _gdk_x11_gc_new,
  92   gdk_x11_draw_rectangle,
  93   gdk_x11_draw_arc,
  94   gdk_x11_draw_polygon,
  95   gdk_x11_draw_text,
  96   gdk_x11_draw_text_wc,
  97   gdk_x11_draw_drawable,
  98   gdk_x11_draw_points,
  99   gdk_x11_draw_segments,
 100   gdk_x11_draw_lines
 101 };
 102
 103 /*****************************************************
 104  * X11 specific implementations of generic functions *
 105  *****************************************************/
 106
 107 GdkColormap*
 108 gdk_drawable_get_colormap (GdkDrawable *drawable)
 109 {
 110   GdkDrawablePrivate *drawable_private;
 111   XWindowAttributes window_attributes;
 112
 113   g_return_val_if_fail (drawable != NULL, NULL);
 114   drawable_private = (GdkDrawablePrivate*) drawable;
 115
 116   if (!GDK_DRAWABLE_DESTROYED (drawable))
 117     {
 118       if (drawable_private->colormap == NULL &&
 119           GDK_IS_WINDOW (drawable))
 120         {
 121           XGetWindowAttributes (GDK_DRAWABLE_XDISPLAY (drawable),
 122                                 GDK_DRAWABLE_XID (drawable),
 123                                 &window_attributes);
 124           drawable_private->colormap =  gdk_colormap_lookup (window_attributes.colormap);
 125         }
 126
 127       return drawable_private->colormap;
 128     }
 129
 130   return NULL;
 131 }
 132
 133 void
 134 gdk_drawable_set_colormap (GdkDrawable *drawable,
 135                            GdkColormap *colormap)
 136 {
 137   GdkDrawablePrivate *drawable_private;
 138   GdkColormapPrivateX *colormap_private;
 139
 140   g_return_if_fail (drawable != NULL);
 141   g_return_if_fail (colormap != NULL);
 142
 143   drawable_private = (GdkDrawablePrivate *)drawable;
 144   colormap_private = (GdkColormapPrivateX *)colormap;
 145
 146   if (!GDK_DRAWABLE_DESTROYED (drawable))
 147     {
 148       if (GDK_IS_WINDOW (drawable))
 149         {
 150           g_return_if_fail (colormap_private->base.visual !=
 151                             ((GdkColormapPrivate *)(drawable_private->colormap))->visual);
 152
 153           XSetWindowColormap (GDK_DRAWABLE_XDISPLAY (drawable),
 154                               GDK_DRAWABLE_XID (drawable),
 155                               colormap_private->xcolormap);
 156         }
 157
 158       if (drawable_private->colormap)
 159         gdk_colormap_unref (drawable_private->colormap);
 160       drawable_private->colormap = colormap;
 161       gdk_colormap_ref (drawable_private->colormap);
 162
 163       if (GDK_IS_WINDOW (drawable) &&
 164           drawable_private->window_type != GDK_WINDOW_TOPLEVEL)
 165         gdk_window_add_colormap_windows (drawable);
 166     }
 167 }
 168
 169 /* Drawing
 170  */
 171 static void
 172 gdk_x11_drawable_destroy (GdkDrawable *drawable)
 173 {
 174
 175 }
 176
 177 static void
 178 gdk_x11_draw_rectangle (GdkDrawable *drawable,
 179                         GdkGC       *gc,
 180                         gint         filled,
 181                         gint         x,
 182                         gint         y,
 183                         gint         width,
 184                         gint         height)
 185 {
 186   if (filled)
 187     XFillRectangle (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 188                     GDK_GC_GET_XGC (gc), x, y, width, height);
 189   else
 190     XDrawRectangle (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 191                     GDK_GC_GET_XGC (gc), x, y, width, height);
 192 }
 193
 194 static void
 195 gdk_x11_draw_arc (GdkDrawable *drawable,
 196                   GdkGC       *gc,
 197                   gint         filled,
 198                   gint         x,
 199                   gint         y,
 200                   gint         width,
 201                   gint         height,
 202                   gint         angle1,
 203                   gint         angle2)
 204 {
 205   if (filled)
 206     XFillArc (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 207               GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
 208   else
 209     XDrawArc (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 210               GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
 211 }
 212
 213 static void
 214 gdk_x11_draw_polygon (GdkDrawable *drawable,
 215                       GdkGC       *gc,
 216                       gint         filled,
 217                       GdkPoint    *points,
 218                       gint         npoints)
 219 {
 220   XPoint *tmp_points;
 221   gint tmp_npoints, i;
 222
 223   if (!filled &&
 224       (points[0].x != points[npoints-1].x || points[0].y != points[npoints-1].y))
 225     {
 226       tmp_npoints = npoints + 1;
 227       tmp_points = g_new (XPoint, tmp_npoints);
 228       tmp_points[npoints].x = points[0].x;
 229       tmp_points[npoints].y = points[0].y;
 230     }
 231   else
 232     {
 233       tmp_npoints = npoints;
 234       tmp_points = g_new (XPoint, tmp_npoints);
 235     }
 236
 237   for (i=0; i<npoints; i++)
 238     {
 239       tmp_points[i].x = points[i].x;
 240       tmp_points[i].y = points[i].y;
 241     }
 242
 243   if (filled)
 244     XFillPolygon (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 245                   GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, Complex, CoordModeOrigin);
 246   else
 247     XDrawLines (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 248                 GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, CoordModeOrigin);
 249
 250   g_free (tmp_points);
 251 }
 252
 253 /* gdk_x11_draw_text
 254  *
 255  * Modified by Li-Da Lho to draw 16 bits and Multibyte strings
 256  *
 257  * Interface changed: add "GdkFont *font" to specify font or fontset explicitely
 258  */
 259 static void
 260 gdk_x11_draw_text (GdkDrawable *drawable,
 261                    GdkFont     *font,
 262                    GdkGC       *gc,
 263                    gint         x,
 264                    gint         y,
 265                    const gchar *text,
 266                    gint         text_length)
 267 {
 268   if (font->type == GDK_FONT_FONT)
 269     {
 270       XFontStruct *xfont = (XFontStruct *) GDK_FONT_XFONT (font);
 271       XSetFont(GDK_DRAWABLE_XDISPLAY (drawable), GDK_GC_GET_XGC (gc), xfont->fid);
 272       if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
 273         {
 274           XDrawString (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 275                        GDK_GC_GET_XGC (gc), x, y, text, text_length);
 276         }
 277       else
 278         {
 279           XDrawString16 (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 280                          GDK_GC_GET_XGC (gc), x, y, (XChar2b *) text, text_length / 2);
 281         }
 282     }
 283   else if (font->type == GDK_FONT_FONTSET)
 284     {
 285       XFontSet fontset = (XFontSet) GDK_FONT_XFONT (font);
 286       XmbDrawString (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 287                      fontset, GDK_GC_GET_XGC (gc), x, y, text, text_length);
 288     }
 289   else
 290     g_error("undefined font type\n");
 291 }
 292
 293 static void
 294 gdk_x11_draw_text_wc (GdkDrawable    *drawable,
 295                       GdkFont        *font,
 296                       GdkGC          *gc,
 297                       gint            x,
 298                       gint            y,
 299                       const GdkWChar *text,
 300                       gint            text_length)
 301 {
 302   if (font->type == GDK_FONT_FONT)
 303     {
 304       XFontStruct *xfont = (XFontStruct *) GDK_FONT_XFONT (font);
 305       gchar *text_8bit;
 306       gint i;
 307       XSetFont(GDK_DRAWABLE_XDISPLAY (drawable), GDK_GC_GET_XGC (gc), xfont->fid);
 308       text_8bit = g_new (gchar, text_length);
 309       for (i=0; i<text_length; i++) text_8bit[i] = text[i];
 310       XDrawString (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 311                    GDK_GC_GET_XGC (gc), x, y, text_8bit, text_length);
 312       g_free (text_8bit);
 313     }
 314   else if (font->type == GDK_FONT_FONTSET)
 315     {
 316       if (sizeof(GdkWChar) == sizeof(wchar_t))
 317         {
 318           XwcDrawString (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 319                          (XFontSet) GDK_FONT_XFONT (font),
 320                          GDK_GC_GET_XGC (gc), x, y, (wchar_t *)text, text_length);
 321         }
 322       else
 323         {
 324           wchar_t *text_wchar;
 325           gint i;
 326           text_wchar = g_new (wchar_t, text_length);
 327           for (i=0; i<text_length; i++) text_wchar[i] = text[i];
 328           XwcDrawString (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 329                          (XFontSet) GDK_FONT_XFONT (font),
 330                          GDK_GC_GET_XGC (gc), x, y, text_wchar, text_length);
 331           g_free (text_wchar);
 332         }
 333     }
 334   else
 335     g_error("undefined font type\n");
 336 }
 337
 338 static void
 339 gdk_x11_draw_drawable (GdkDrawable *drawable,
 340                        GdkGC       *gc,
 341                        GdkPixmap   *src,
 342                        gint         xsrc,
 343                        gint         ysrc,
 344                        gint         xdest,
 345                        gint         ydest,
 346                        gint         width,
 347                        gint         height)
 348 {
 349   int src_depth = gdk_drawable_get_depth (src);
 350   int dest_depth = gdk_drawable_get_depth (drawable);
 351
 352   if (src_depth == 1)
 353     {
 354       XCopyArea (GDK_DRAWABLE_XDISPLAY (drawable),
 355                  GDK_DRAWABLE_XID (src),
 356                  GDK_DRAWABLE_XID (drawable),
 357                  GDK_GC_GET_XGC (gc),
 358                  xsrc, ysrc,
 359                  width, height,
 360                  xdest, ydest);
 361     }
 362   else if (dest_depth != 0 && src_depth == dest_depth)
 363     {
 364       XCopyArea (GDK_DRAWABLE_XDISPLAY (drawable),
 365                  GDK_DRAWABLE_XID (src),
 366                  GDK_DRAWABLE_XID (drawable),
 367                  GDK_GC_GET_XGC (gc),
 368                  xsrc, ysrc,
 369                  width, height,
 370                  xdest, ydest);
 371     }
 372   else
 373     g_warning ("Attempt to copy between drawables of mismatched depths!\n");
 374 }
 375
 376 static void
 377 gdk_x11_draw_points (GdkDrawable *drawable,
 378                      GdkGC       *gc,
 379                      GdkPoint    *points,
 380                      gint         npoints)
 381 {
 382   /* We special-case npoints == 1, because X will merge multiple
 383    * consecutive XDrawPoint requests into a PolyPoint request
 384    */
 385   if (npoints == 1)
 386     {
 387       XDrawPoint (GDK_DRAWABLE_XDISPLAY (drawable),
 388                   GDK_DRAWABLE_XID (drawable),
 389                   GDK_GC_GET_XGC (gc),
 390                   points[0].x, points[0].y);
 391     }
 392   else
 393     {
 394       gint i;
 395       XPoint *tmp_points = g_new (XPoint, npoints);
 396
 397       for (i=0; i<npoints; i++)
 398         {
 399           tmp_points[i].x = points[i].x;
 400           tmp_points[i].y = points[i].y;
 401         }
 402
 403       XDrawPoints (GDK_DRAWABLE_XDISPLAY (drawable),
 404                    GDK_DRAWABLE_XID (drawable),
 405                    GDK_GC_GET_XGC (gc),
 406                    tmp_points,
 407                    npoints,
 408                    CoordModeOrigin);
 409
 410       g_free (tmp_points);
 411     }
 412 }
 413
 414 static void
 415 gdk_x11_draw_segments (GdkDrawable *drawable,
 416                        GdkGC       *gc,
 417                        GdkSegment  *segs,
 418                        gint         nsegs)
 419 {
 420   /* We special-case nsegs == 1, because X will merge multiple
 421    * consecutive XDrawLine requests into a PolySegment request
 422    */
 423   if (nsegs == 1)
 424     {
 425       XDrawLine (GDK_DRAWABLE_XDISPLAY (drawable), GDK_DRAWABLE_XID (drawable),
 426                  GDK_GC_GET_XGC (gc), segs[0].x1, segs[0].y1,
 427                  segs[0].x2, segs[0].y2);
 428     }
 429   else
 430     {
 431       gint i;
 432       XSegment *tmp_segs = g_new (XSegment, nsegs);
 433
 434       for (i=0; i<nsegs; i++)
 435         {
 436           tmp_segs[i].x1 = segs[i].x1;
 437           tmp_segs[i].x2 = segs[i].x2;
 438           tmp_segs[i].y1 = segs[i].y1;
 439           tmp_segs[i].y2 = segs[i].y2;
 440         }
 441
 442       XDrawSegments (GDK_DRAWABLE_XDISPLAY (drawable),
 443                      GDK_DRAWABLE_XID (drawable),
 444                      GDK_GC_GET_XGC (gc),
 445                      tmp_segs, nsegs);
 446
 447       g_free (tmp_segs);
 448     }
 449 }
 450
 451 static void
 452 gdk_x11_draw_lines (GdkDrawable *drawable,
 453                     GdkGC       *gc,
 454                     GdkPoint    *points,
 455                     gint         npoints)
 456 {
 457   gint i;
 458   XPoint *tmp_points = g_new (XPoint, npoints);
 459
 460   for (i=0; i<npoints; i++)
 461     {
 462       tmp_points[i].x = points[i].x;
 463       tmp_points[i].y = points[i].y;
 464     }
 465
 466   XDrawLines (GDK_DRAWABLE_XDISPLAY (drawable),
 467               GDK_DRAWABLE_XID (drawable),
 468               GDK_GC_GET_XGC (gc),
 469               tmp_points, npoints,
 470               CoordModeOrigin);
 471
 472   g_free (tmp_points);
 473 }