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

   1 /* 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 Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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 1997-2000.  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 <config.h>
  28
  29 #include "gdkx.h"
  30 #include "gdkregion-generic.h"
  31
  32 #include <cairo-xlib.h>
  33
  34 #include <stdlib.h>
  35 #include <string.h>             /* for memcpy() */
  36
  37 #if defined (HAVE_IPC_H) && defined (HAVE_SHM_H) && defined (HAVE_XSHM_H)
  38 #define USE_SHM
  39 #endif
  40
  41 #ifdef USE_SHM
  42 #include <X11/extensions/XShm.h>
  43 #endif /* USE_SHM */
  44
  45 #include "gdkprivate-x11.h"
  46 #include "gdkdrawable-x11.h"
  47 #include "gdkpixmap-x11.h"
  48 #include "gdkscreen-x11.h"
  49 #include "gdkdisplay-x11.h"
  50
  51 #include "gdkalias.h"
  52
  53 static void gdk_x11_draw_rectangle (GdkDrawable    *drawable,
  54                                     GdkGC          *gc,
  55                                     gboolean        filled,
  56                                     gint            x,
  57                                     gint            y,
  58                                     gint            width,
  59                                     gint            height);
  60 static void gdk_x11_draw_arc       (GdkDrawable    *drawable,
  61                                     GdkGC          *gc,
  62                                     gboolean        filled,
  63                                     gint            x,
  64                                     gint            y,
  65                                     gint            width,
  66                                     gint            height,
  67                                     gint            angle1,
  68                                     gint            angle2);
  69 static void gdk_x11_draw_polygon   (GdkDrawable    *drawable,
  70                                     GdkGC          *gc,
  71                                     gboolean        filled,
  72                                     GdkPoint       *points,
  73                                     gint            npoints);
  74 static void gdk_x11_draw_text      (GdkDrawable    *drawable,
  75                                     GdkFont        *font,
  76                                     GdkGC          *gc,
  77                                     gint            x,
  78                                     gint            y,
  79                                     const gchar    *text,
  80                                     gint            text_length);
  81 static void gdk_x11_draw_text_wc   (GdkDrawable    *drawable,
  82                                     GdkFont        *font,
  83                                     GdkGC          *gc,
  84                                     gint            x,
  85                                     gint            y,
  86                                     const GdkWChar *text,
  87                                     gint            text_length);
  88 static void gdk_x11_draw_drawable  (GdkDrawable    *drawable,
  89                                     GdkGC          *gc,
  90                                     GdkPixmap      *src,
  91                                     gint            xsrc,
  92                                     gint            ysrc,
  93                                     gint            xdest,
  94                                     gint            ydest,
  95                                     gint            width,
  96                                     gint            height);
  97 static void gdk_x11_draw_points    (GdkDrawable    *drawable,
  98                                     GdkGC          *gc,
  99                                     GdkPoint       *points,
 100                                     gint            npoints);
 101 static void gdk_x11_draw_segments  (GdkDrawable    *drawable,
 102                                     GdkGC          *gc,
 103                                     GdkSegment     *segs,
 104                                     gint            nsegs);
 105 static void gdk_x11_draw_lines     (GdkDrawable    *drawable,
 106                                     GdkGC          *gc,
 107                                     GdkPoint       *points,
 108                                     gint            npoints);
 109
 110 static void gdk_x11_draw_image     (GdkDrawable     *drawable,
 111                                     GdkGC           *gc,
 112                                     GdkImage        *image,
 113                                     gint             xsrc,
 114                                     gint             ysrc,
 115                                     gint             xdest,
 116                                     gint             ydest,
 117                                     gint             width,
 118                                     gint             height);
 119 static void gdk_x11_draw_pixbuf    (GdkDrawable     *drawable,
 120                                     GdkGC           *gc,
 121                                     GdkPixbuf       *pixbuf,
 122                                     gint             src_x,
 123                                     gint             src_y,
 124                                     gint             dest_x,
 125                                     gint             dest_y,
 126                                     gint             width,
 127                                     gint             height,
 128                                     GdkRgbDither     dither,
 129                                     gint             x_dither,
 130                                     gint             y_dither);
 131
 132 static cairo_surface_t *gdk_x11_ref_cairo_surface (GdkDrawable *drawable);
 133
 134 static void gdk_x11_set_colormap   (GdkDrawable    *drawable,
 135                                     GdkColormap    *colormap);
 136
 137 static GdkColormap* gdk_x11_get_colormap   (GdkDrawable    *drawable);
 138 static gint         gdk_x11_get_depth      (GdkDrawable    *drawable);
 139 static GdkScreen *  gdk_x11_get_screen     (GdkDrawable    *drawable);
 140 static GdkVisual*   gdk_x11_get_visual     (GdkDrawable    *drawable);
 141
 142 static void gdk_drawable_impl_x11_finalize   (GObject *object);
 143
 144 static const cairo_user_data_key_t gdk_x11_cairo_key;
 145
 146 G_DEFINE_TYPE (GdkDrawableImplX11, _gdk_drawable_impl_x11, GDK_TYPE_DRAWABLE)
 147
 148 static void
 149 _gdk_drawable_impl_x11_class_init (GdkDrawableImplX11Class *klass)
 150 {
 151   GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
 152   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 153
 154   object_class->finalize = gdk_drawable_impl_x11_finalize;
 155
 156   drawable_class->create_gc = _gdk_x11_gc_new;
 157   drawable_class->draw_rectangle = gdk_x11_draw_rectangle;
 158   drawable_class->draw_arc = gdk_x11_draw_arc;
 159   drawable_class->draw_polygon = gdk_x11_draw_polygon;
 160   drawable_class->draw_text = gdk_x11_draw_text;
 161   drawable_class->draw_text_wc = gdk_x11_draw_text_wc;
 162   drawable_class->draw_drawable = gdk_x11_draw_drawable;
 163   drawable_class->draw_points = gdk_x11_draw_points;
 164   drawable_class->draw_segments = gdk_x11_draw_segments;
 165   drawable_class->draw_lines = gdk_x11_draw_lines;
 166   drawable_class->draw_image = gdk_x11_draw_image;
 167   drawable_class->draw_pixbuf = gdk_x11_draw_pixbuf;
 168
 169   drawable_class->ref_cairo_surface = gdk_x11_ref_cairo_surface;
 170
 171   drawable_class->set_colormap = gdk_x11_set_colormap;
 172   drawable_class->get_colormap = gdk_x11_get_colormap;
 173
 174   drawable_class->get_depth = gdk_x11_get_depth;
 175   drawable_class->get_screen = gdk_x11_get_screen;
 176   drawable_class->get_visual = gdk_x11_get_visual;
 177
 178   drawable_class->_copy_to_image = _gdk_x11_copy_to_image;
 179 }
 180
 181 static void
 182 _gdk_drawable_impl_x11_init (GdkDrawableImplX11 *impl)
 183 {
 184 }
 185
 186 static void
 187 gdk_drawable_impl_x11_finalize (GObject *object)
 188 {
 189   gdk_drawable_set_colormap (GDK_DRAWABLE (object), NULL);
 190
 191   G_OBJECT_CLASS (_gdk_drawable_impl_x11_parent_class)->finalize (object);
 192 }
 193
 194 /**
 195  * _gdk_x11_drawable_finish:
 196  * @drawable: a #GdkDrawableImplX11.
 197  *
 198  * Performs necessary cleanup prior to freeing a pixmap or
 199  * destroying a window.
 200  **/
 201 void
 202 _gdk_x11_drawable_finish (GdkDrawable *drawable)
 203 {
 204   GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 205
 206   if (impl->picture)
 207     {
 208       XRenderFreePicture (GDK_SCREEN_XDISPLAY (impl->screen),
 209                           impl->picture);
 210       impl->picture = None;
 211     }
 212
 213   if (impl->cairo_surface)
 214     {
 215       cairo_surface_finish (impl->cairo_surface);
 216       cairo_surface_set_user_data (impl->cairo_surface, &gdk_x11_cairo_key,
 217                                    NULL, NULL);
 218     }
 219 }
 220
 221 /**
 222  * _gdk_x11_drawable_update_size:
 223  * @drawable: a #GdkDrawableImplX11.
 224  *
 225  * Updates the state of the drawable (in particular the drawable's
 226  * cairo surface) when its size has changed.
 227  **/
 228 void
 229 _gdk_x11_drawable_update_size (GdkDrawable *drawable)
 230 {
 231   GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 232
 233   if (impl->cairo_surface)
 234     {
 235       int width, height;
 236
 237       gdk_drawable_get_size (drawable, &width, &height);
 238       cairo_xlib_surface_set_size (impl->cairo_surface, width, height);
 239     }
 240 }
 241
 242 static void
 243 try_pixmap (Display *xdisplay,
 244             int      screen,
 245             int      depth)
 246 {
 247   Pixmap pixmap = XCreatePixmap (xdisplay,
 248                                  RootWindow (xdisplay, screen),
 249                                  1, 1, depth);
 250   XFreePixmap (xdisplay, pixmap);
 251 }
 252
 253 gboolean
 254 _gdk_x11_have_render (GdkDisplay *display)
 255 {
 256   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 257   GdkDisplayX11 *x11display = GDK_DISPLAY_X11 (display);
 258
 259   if (x11display->have_render == GDK_UNKNOWN)
 260     {
 261       int event_base, error_base;
 262       x11display->have_render =
 263         XRenderQueryExtension (xdisplay, &event_base, &error_base)
 264         ? GDK_YES : GDK_NO;
 265
 266       if (x11display->have_render == GDK_YES)
 267         {
 268           /*
 269            * Sun advertises RENDER, but fails to support 32-bit pixmaps.
 270            * That is just no good.  Therefore, we check all screens
 271            * for proper support.
 272            */
 273
 274           int screen;
 275           for (screen = 0; screen < ScreenCount (xdisplay); screen++)
 276             {
 277               int count;
 278               int *depths = XListDepths (xdisplay, screen, &count);
 279               gboolean has_8 = FALSE, has_32 = FALSE;
 280
 281               if (depths)
 282                 {
 283                   int i;
 284
 285                   for (i = 0; i < count; i++)
 286                     {
 287                       if (depths[i] == 8)
 288                         has_8 = TRUE;
 289                       else if (depths[i] == 32)
 290                         has_32 = TRUE;
 291                     }
 292                   XFree (depths);
 293                 }
 294
 295               /* At this point, we might have a false positive;
 296                * buggy versions of Xinerama only report depths for
 297                * which there is an associated visual; so we actually
 298                * go ahead and try create pixmaps.
 299                */
 300               if (!(has_8 && has_32))
 301                 {
 302                   gdk_error_trap_push ();
 303                   if (!has_8)
 304                     try_pixmap (xdisplay, screen, 8);
 305                   if (!has_32)
 306                     try_pixmap (xdisplay, screen, 32);
 307                   XSync (xdisplay, False);
 308                   if (gdk_error_trap_pop () == 0)
 309                     {
 310                       has_8 = TRUE;
 311                       has_32 = TRUE;
 312                     }
 313                 }
 314
 315               if (!(has_8 && has_32))
 316                 {
 317                   g_warning ("The X server advertises that RENDER support is present,\n"
 318                              "but fails to supply the necessary pixmap support.  In\n"
 319                              "other words, it is buggy.");
 320                   x11display->have_render = GDK_NO;
 321                   break;
 322                 }
 323             }
 324         }
 325     }
 326
 327   return x11display->have_render == GDK_YES;
 328 }
 329
 330 static Picture
 331 gdk_x11_drawable_get_picture (GdkDrawable *drawable)
 332 {
 333   GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 334
 335   if (!impl->picture)
 336     {
 337       Display *xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
 338       XRenderPictFormat *format;
 339
 340       GdkVisual *visual = gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
 341       if (!visual)
 342         return None;
 343
 344       format = XRenderFindVisualFormat (xdisplay, GDK_VISUAL_XVISUAL (visual));
 345       if (format)
 346         {
 347           XRenderPictureAttributes attributes;
 348           attributes.graphics_exposures = False;
 349
 350           impl->picture = XRenderCreatePicture (xdisplay, impl->xid, format,
 351                                                 CPGraphicsExposure, &attributes);
 352         }
 353     }
 354
 355   return impl->picture;
 356 }
 357
 358 static void
 359 gdk_x11_drawable_update_picture_clip (GdkDrawable *drawable,
 360                                       GdkGC       *gc)
 361 {
 362   GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 363   Display *xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
 364   Picture picture = gdk_x11_drawable_get_picture (drawable);
 365   GdkRegion *clip_region = gc ? _gdk_gc_get_clip_region (gc) : NULL;
 366
 367   if (clip_region)
 368     {
 369       GdkRegionBox *boxes = clip_region->rects;
 370       gint n_boxes = clip_region->numRects;
 371       XRectangle *rects = g_new (XRectangle, n_boxes);
 372       int i;
 373
 374       for (i=0; i < n_boxes; i++)
 375         {
 376           rects[i].x = CLAMP (boxes[i].x1 + gc->clip_x_origin, G_MINSHORT, G_MAXSHORT);
 377           rects[i].y = CLAMP (boxes[i].y1 + gc->clip_y_origin, G_MINSHORT, G_MAXSHORT);
 378           rects[i].width = CLAMP (boxes[i].x2 + gc->clip_x_origin, G_MINSHORT, G_MAXSHORT) - rects[i].x;
 379           rects[i].height = CLAMP (boxes[i].y2 + gc->clip_y_origin, G_MINSHORT, G_MAXSHORT) - rects[i].y;
 380         }
 381
 382       XRenderSetPictureClipRectangles (xdisplay, picture,
 383                                        0, 0, rects, n_boxes);
 384
 385       g_free (rects);
 386     }
 387   else
 388     {
 389       XRenderPictureAttributes pa;
 390       pa.clip_mask = None;
 391       XRenderChangePicture (xdisplay, picture,
 392                             CPClipMask, &pa);
 393     }
 394 }
 395
 396 /*****************************************************
 397  * X11 specific implementations of generic functions *
 398  *****************************************************/
 399
 400 static GdkColormap*
 401 gdk_x11_get_colormap (GdkDrawable *drawable)
 402 {
 403   GdkDrawableImplX11 *impl;
 404
 405   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 406
 407   return impl->colormap;
 408 }
 409
 410 static void
 411 gdk_x11_set_colormap (GdkDrawable *drawable,
 412                       GdkColormap *colormap)
 413 {
 414   GdkDrawableImplX11 *impl;
 415
 416   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 417
 418   if (impl->colormap == colormap)
 419     return;
 420
 421   if (impl->colormap)
 422     g_object_unref (impl->colormap);
 423   impl->colormap = colormap;
 424   if (impl->colormap)
 425     g_object_ref (impl->colormap);
 426 }
 427
 428 /* Drawing
 429  */
 430
 431 static void
 432 gdk_x11_draw_rectangle (GdkDrawable *drawable,
 433                         GdkGC       *gc,
 434                         gboolean     filled,
 435                         gint         x,
 436                         gint         y,
 437                         gint         width,
 438                         gint         height)
 439 {
 440   GdkDrawableImplX11 *impl;
 441
 442   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 443
 444   if (filled)
 445     XFillRectangle (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 446                     GDK_GC_GET_XGC (gc), x, y, width, height);
 447   else
 448     XDrawRectangle (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 449                     GDK_GC_GET_XGC (gc), x, y, width, height);
 450 }
 451
 452 static void
 453 gdk_x11_draw_arc (GdkDrawable *drawable,
 454                   GdkGC       *gc,
 455                   gboolean     filled,
 456                   gint         x,
 457                   gint         y,
 458                   gint         width,
 459                   gint         height,
 460                   gint         angle1,
 461                   gint         angle2)
 462 {
 463   GdkDrawableImplX11 *impl;
 464
 465   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 466
 467
 468   if (filled)
 469     XFillArc (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 470               GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
 471   else
 472     XDrawArc (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 473               GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
 474 }
 475
 476 static void
 477 gdk_x11_draw_polygon (GdkDrawable *drawable,
 478                       GdkGC       *gc,
 479                       gboolean     filled,
 480                       GdkPoint    *points,
 481                       gint         npoints)
 482 {
 483   XPoint *tmp_points;
 484   gint tmp_npoints, i;
 485   GdkDrawableImplX11 *impl;
 486
 487   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 488
 489
 490   if (!filled &&
 491       (points[0].x != points[npoints-1].x || points[0].y != points[npoints-1].y))
 492     {
 493       tmp_npoints = npoints + 1;
 494       tmp_points = g_new (XPoint, tmp_npoints);
 495       tmp_points[npoints].x = points[0].x;
 496       tmp_points[npoints].y = points[0].y;
 497     }
 498   else
 499     {
 500       tmp_npoints = npoints;
 501       tmp_points = g_new (XPoint, tmp_npoints);
 502     }
 503
 504   for (i=0; i<npoints; i++)
 505     {
 506       tmp_points[i].x = points[i].x;
 507       tmp_points[i].y = points[i].y;
 508     }
 509
 510   if (filled)
 511     XFillPolygon (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 512                   GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, Complex, CoordModeOrigin);
 513   else
 514     XDrawLines (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 515                 GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, CoordModeOrigin);
 516
 517   g_free (tmp_points);
 518 }
 519
 520 /* gdk_x11_draw_text
 521  *
 522  * Modified by Li-Da Lho to draw 16 bits and Multibyte strings
 523  *
 524  * Interface changed: add "GdkFont *font" to specify font or fontset explicitely
 525  */
 526 static void
 527 gdk_x11_draw_text (GdkDrawable *drawable,
 528                    GdkFont     *font,
 529                    GdkGC       *gc,
 530                    gint         x,
 531                    gint         y,
 532                    const gchar *text,
 533                    gint         text_length)
 534 {
 535   GdkDrawableImplX11 *impl;
 536   Display *xdisplay;
 537
 538   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 539   xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
 540
 541   if (font->type == GDK_FONT_FONT)
 542     {
 543       XFontStruct *xfont = (XFontStruct *) GDK_FONT_XFONT (font);
 544       XSetFont(xdisplay, GDK_GC_GET_XGC (gc), xfont->fid);
 545       if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
 546         {
 547           XDrawString (xdisplay, impl->xid,
 548                        GDK_GC_GET_XGC (gc), x, y, text, text_length);
 549         }
 550       else
 551         {
 552           XDrawString16 (xdisplay, impl->xid,
 553                          GDK_GC_GET_XGC (gc), x, y, (XChar2b *) text, text_length / 2);
 554         }
 555     }
 556   else if (font->type == GDK_FONT_FONTSET)
 557     {
 558       XFontSet fontset = (XFontSet) GDK_FONT_XFONT (font);
 559       XmbDrawString (xdisplay, impl->xid,
 560                      fontset, GDK_GC_GET_XGC (gc), x, y, text, text_length);
 561     }
 562   else
 563     g_error("undefined font type\n");
 564 }
 565
 566 static void
 567 gdk_x11_draw_text_wc (GdkDrawable    *drawable,
 568                       GdkFont        *font,
 569                       GdkGC          *gc,
 570                       gint            x,
 571                       gint            y,
 572                       const GdkWChar *text,
 573                       gint            text_length)
 574 {
 575   GdkDrawableImplX11 *impl;
 576   Display *xdisplay;
 577
 578   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 579   xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
 580
 581   if (font->type == GDK_FONT_FONT)
 582     {
 583       XFontStruct *xfont = (XFontStruct *) GDK_FONT_XFONT (font);
 584       gchar *text_8bit;
 585       gint i;
 586       XSetFont(xdisplay, GDK_GC_GET_XGC (gc), xfont->fid);
 587       text_8bit = g_new (gchar, text_length);
 588       for (i=0; i<text_length; i++) text_8bit[i] = text[i];
 589       XDrawString (xdisplay, impl->xid,
 590                    GDK_GC_GET_XGC (gc), x, y, text_8bit, text_length);
 591       g_free (text_8bit);
 592     }
 593   else if (font->type == GDK_FONT_FONTSET)
 594     {
 595       if (sizeof(GdkWChar) == sizeof(wchar_t))
 596         {
 597           XwcDrawString (xdisplay, impl->xid,
 598                          (XFontSet) GDK_FONT_XFONT (font),
 599                          GDK_GC_GET_XGC (gc), x, y, (wchar_t *)text, text_length);
 600         }
 601       else
 602         {
 603           wchar_t *text_wchar;
 604           gint i;
 605           text_wchar = g_new (wchar_t, text_length);
 606           for (i=0; i<text_length; i++) text_wchar[i] = text[i];
 607           XwcDrawString (xdisplay, impl->xid,
 608                          (XFontSet) GDK_FONT_XFONT (font),
 609                          GDK_GC_GET_XGC (gc), x, y, text_wchar, text_length);
 610           g_free (text_wchar);
 611         }
 612     }
 613   else
 614     g_error("undefined font type\n");
 615 }
 616
 617 static void
 618 gdk_x11_draw_drawable (GdkDrawable *drawable,
 619                        GdkGC       *gc,
 620                        GdkPixmap   *src,
 621                        gint         xsrc,
 622                        gint         ysrc,
 623                        gint         xdest,
 624                        gint         ydest,
 625                        gint         width,
 626                        gint         height)
 627 {
 628   int src_depth = gdk_drawable_get_depth (src);
 629   int dest_depth = gdk_drawable_get_depth (drawable);
 630   GdkDrawableImplX11 *impl;
 631   GdkDrawableImplX11 *src_impl;
 632
 633   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 634
 635   if (GDK_IS_DRAWABLE_IMPL_X11 (src))
 636     src_impl = GDK_DRAWABLE_IMPL_X11 (src);
 637   else
 638     src_impl = NULL;
 639
 640   if (src_depth == 1)
 641     {
 642       XCopyArea (GDK_SCREEN_XDISPLAY (impl->screen),
 643                  src_impl ? src_impl->xid : GDK_DRAWABLE_XID (src),
 644                  impl->xid,
 645                  GDK_GC_GET_XGC (gc),
 646                  xsrc, ysrc,
 647                  width, height,
 648                  xdest, ydest);
 649     }
 650   else if (dest_depth != 0 && src_depth == dest_depth)
 651     {
 652       XCopyArea (GDK_SCREEN_XDISPLAY (impl->screen),
 653                  src_impl ? src_impl->xid : GDK_DRAWABLE_XID (src),
 654                  impl->xid,
 655                  GDK_GC_GET_XGC (gc),
 656                  xsrc, ysrc,
 657                  width, height,
 658                  xdest, ydest);
 659     }
 660   else
 661     g_warning ("Attempt to draw a drawable with depth %d to a drawable with depth %d",
 662                src_depth, dest_depth);
 663 }
 664
 665 static void
 666 gdk_x11_draw_points (GdkDrawable *drawable,
 667                      GdkGC       *gc,
 668                      GdkPoint    *points,
 669                      gint         npoints)
 670 {
 671   GdkDrawableImplX11 *impl;
 672
 673   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 674
 675
 676   /* We special-case npoints == 1, because X will merge multiple
 677    * consecutive XDrawPoint requests into a PolyPoint request
 678    */
 679   if (npoints == 1)
 680     {
 681       XDrawPoint (GDK_SCREEN_XDISPLAY (impl->screen),
 682                   impl->xid,
 683                   GDK_GC_GET_XGC (gc),
 684                   points[0].x, points[0].y);
 685     }
 686   else
 687     {
 688       gint i;
 689       XPoint *tmp_points = g_new (XPoint, npoints);
 690
 691       for (i=0; i<npoints; i++)
 692         {
 693           tmp_points[i].x = points[i].x;
 694           tmp_points[i].y = points[i].y;
 695         }
 696
 697       XDrawPoints (GDK_SCREEN_XDISPLAY (impl->screen),
 698                    impl->xid,
 699                    GDK_GC_GET_XGC (gc),
 700                    tmp_points,
 701                    npoints,
 702                    CoordModeOrigin);
 703
 704       g_free (tmp_points);
 705     }
 706 }
 707
 708 static void
 709 gdk_x11_draw_segments (GdkDrawable *drawable,
 710                        GdkGC       *gc,
 711                        GdkSegment  *segs,
 712                        gint         nsegs)
 713 {
 714   GdkDrawableImplX11 *impl;
 715
 716   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 717
 718
 719   /* We special-case nsegs == 1, because X will merge multiple
 720    * consecutive XDrawLine requests into a PolySegment request
 721    */
 722   if (nsegs == 1)
 723     {
 724       XDrawLine (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 725                  GDK_GC_GET_XGC (gc), segs[0].x1, segs[0].y1,
 726                  segs[0].x2, segs[0].y2);
 727     }
 728   else
 729     {
 730       gint i;
 731       XSegment *tmp_segs = g_new (XSegment, nsegs);
 732
 733       for (i=0; i<nsegs; i++)
 734         {
 735           tmp_segs[i].x1 = segs[i].x1;
 736           tmp_segs[i].x2 = segs[i].x2;
 737           tmp_segs[i].y1 = segs[i].y1;
 738           tmp_segs[i].y2 = segs[i].y2;
 739         }
 740
 741       XDrawSegments (GDK_SCREEN_XDISPLAY (impl->screen),
 742                      impl->xid,
 743                      GDK_GC_GET_XGC (gc),
 744                      tmp_segs, nsegs);
 745
 746       g_free (tmp_segs);
 747     }
 748 }
 749
 750 static void
 751 gdk_x11_draw_lines (GdkDrawable *drawable,
 752                     GdkGC       *gc,
 753                     GdkPoint    *points,
 754                     gint         npoints)
 755 {
 756   gint i;
 757   XPoint *tmp_points = g_new (XPoint, npoints);
 758   GdkDrawableImplX11 *impl;
 759
 760   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 761
 762
 763   for (i=0; i<npoints; i++)
 764     {
 765       tmp_points[i].x = points[i].x;
 766       tmp_points[i].y = points[i].y;
 767     }
 768
 769   XDrawLines (GDK_SCREEN_XDISPLAY (impl->screen),
 770               impl->xid,
 771               GDK_GC_GET_XGC (gc),
 772               tmp_points, npoints,
 773               CoordModeOrigin);
 774
 775   g_free (tmp_points);
 776 }
 777
 778 static void
 779 gdk_x11_draw_image     (GdkDrawable     *drawable,
 780                         GdkGC           *gc,
 781                         GdkImage        *image,
 782                         gint             xsrc,
 783                         gint             ysrc,
 784                         gint             xdest,
 785                         gint             ydest,
 786                         gint             width,
 787                         gint             height)
 788 {
 789   GdkDrawableImplX11 *impl;
 790
 791   impl = GDK_DRAWABLE_IMPL_X11 (drawable);
 792
 793 #ifdef USE_SHM
 794   if (image->type == GDK_IMAGE_SHARED)
 795     XShmPutImage (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 796                   GDK_GC_GET_XGC (gc), GDK_IMAGE_XIMAGE (image),
 797                   xsrc, ysrc, xdest, ydest, width, height, False);
 798   else
 799 #endif
 800     XPutImage (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
 801                GDK_GC_GET_XGC (gc), GDK_IMAGE_XIMAGE (image),
 802                xsrc, ysrc, xdest, ydest, width, height);
 803 }
 804
 805 static gint
 806 gdk_x11_get_depth (GdkDrawable *drawable)
 807 {
 808   /* This is a bit bogus but I'm not sure the other way is better */
 809
 810   return gdk_drawable_get_depth (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
 811 }
 812
 813 static GdkDrawable *
 814 get_impl_drawable (GdkDrawable *drawable)
 815 {
 816   if (GDK_IS_WINDOW (drawable))
 817     return ((GdkWindowObject *)drawable)->impl;
 818   else if (GDK_IS_PIXMAP (drawable))
 819     return ((GdkPixmapObject *)drawable)->impl;
 820   else
 821     {
 822       g_warning (G_STRLOC " drawable is not a pixmap or window");
 823       return NULL;
 824     }
 825 }
 826
 827 static GdkScreen*
 828 gdk_x11_get_screen (GdkDrawable *drawable)
 829 {
 830   if (GDK_IS_DRAWABLE_IMPL_X11 (drawable))
 831     return GDK_DRAWABLE_IMPL_X11 (drawable)->screen;
 832   else
 833     return GDK_DRAWABLE_IMPL_X11 (get_impl_drawable (drawable))->screen;
 834 }
 835
 836 static GdkVisual*
 837 gdk_x11_get_visual (GdkDrawable    *drawable)
 838 {
 839   return gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
 840 }
 841
 842 /**
 843  * gdk_x11_drawable_get_xdisplay:
 844  * @drawable: a #GdkDrawable.
 845  *
 846  * Returns the display of a #GdkDrawable.
 847  *
 848  * Return value: an Xlib <type>Display*</type>.
 849  **/
 850 Display *
 851 gdk_x11_drawable_get_xdisplay (GdkDrawable *drawable)
 852 {
 853   if (GDK_IS_DRAWABLE_IMPL_X11 (drawable))
 854     return GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (drawable)->screen);
 855   else
 856     return GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (get_impl_drawable (drawable))->screen);
 857 }
 858
 859 /**
 860  * gdk_x11_drawable_get_xid:
 861  * @drawable: a #GdkDrawable.
 862  *
 863  * Returns the X resource (window or pixmap) belonging to a #GdkDrawable.
 864  *
 865  * Return value: the ID of @drawable's X resource.
 866  **/
 867 XID
 868 gdk_x11_drawable_get_xid (GdkDrawable *drawable)
 869 {
 870   GdkDrawable *impl;
 871
 872   if (GDK_IS_WINDOW (drawable))
 873     impl = ((GdkPixmapObject *)drawable)->impl;
 874   else if (GDK_IS_PIXMAP (drawable))
 875     impl = ((GdkPixmapObject *)drawable)->impl;
 876   else
 877     {
 878       g_warning (G_STRLOC " drawable is not a pixmap or window");
 879       return None;
 880     }
 881
 882   return ((GdkDrawableImplX11 *)impl)->xid;
 883 }
 884
 885 /* Code for accelerated alpha compositing using the RENDER extension.
 886  * It's a bit long because there are lots of possibilities for
 887  * what's the fastest depending on the available picture formats,
 888  * whether we can used shared pixmaps, etc.
 889  */
 890
 891 static GdkX11FormatType
 892 select_format (GdkDisplay         *display,
 893                XRenderPictFormat **format,
 894                XRenderPictFormat **mask)
 895 {
 896   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 897   XRenderPictFormat pf;
 898
 899   if (!_gdk_x11_have_render (display))
 900     return GDK_X11_FORMAT_NONE;
 901
 902   /* Look for a 32-bit xRGB and Axxx formats that exactly match the
 903    * in memory data format. We can use them as pixmap and mask
 904    * to deal with non-premultiplied data.
 905    */
 906
 907   pf.type = PictTypeDirect;
 908   pf.depth = 32;
 909   pf.direct.redMask = 0xff;
 910   pf.direct.greenMask = 0xff;
 911   pf.direct.blueMask = 0xff;
 912
 913   pf.direct.alphaMask = 0;
 914   if (ImageByteOrder (xdisplay) == LSBFirst)
 915     {
 916       /* ABGR */
 917       pf.direct.red = 0;
 918       pf.direct.green = 8;
 919       pf.direct.blue = 16;
 920     }
 921   else
 922     {
 923       /* RGBA */
 924       pf.direct.red = 24;
 925       pf.direct.green = 16;
 926       pf.direct.blue = 8;
 927     }
 928
 929   *format = XRenderFindFormat (xdisplay,
 930                                (PictFormatType | PictFormatDepth |
 931                                 PictFormatRedMask | PictFormatRed |
 932                                 PictFormatGreenMask | PictFormatGreen |
 933                                 PictFormatBlueMask | PictFormatBlue |
 934                                 PictFormatAlphaMask),
 935                                &pf,
 936                                0);
 937
 938   pf.direct.alphaMask = 0xff;
 939   if (ImageByteOrder (xdisplay) == LSBFirst)
 940     {
 941       /* ABGR */
 942       pf.direct.alpha = 24;
 943     }
 944   else
 945     {
 946       pf.direct.alpha = 0;
 947     }
 948
 949   *mask = XRenderFindFormat (xdisplay,
 950                              (PictFormatType | PictFormatDepth |
 951                               PictFormatAlphaMask | PictFormatAlpha),
 952                              &pf,
 953                              0);
 954
 955   if (*format && *mask)
 956     return GDK_X11_FORMAT_EXACT_MASK;
 957
 958   /* OK, that failed, now look for xRGB and Axxx formats in
 959    * RENDER's preferred order
 960    */
 961   pf.direct.alphaMask = 0;
 962   /* ARGB */
 963   pf.direct.red = 16;
 964   pf.direct.green = 8;
 965   pf.direct.blue = 0;
 966
 967   *format = XRenderFindFormat (xdisplay,
 968                                (PictFormatType | PictFormatDepth |
 969                                 PictFormatRedMask | PictFormatRed |
 970                                 PictFormatGreenMask | PictFormatGreen |
 971                                 PictFormatBlueMask | PictFormatBlue |
 972                                 PictFormatAlphaMask),
 973                                &pf,
 974                                0);
 975
 976   pf.direct.alphaMask = 0xff;
 977   pf.direct.alpha = 24;
 978
 979   *mask = XRenderFindFormat (xdisplay,
 980                              (PictFormatType | PictFormatDepth |
 981                               PictFormatAlphaMask | PictFormatAlpha),
 982                              &pf,
 983                              0);
 984
 985   if (*format && *mask)
 986     return GDK_X11_FORMAT_ARGB_MASK;
 987
 988   /* Finally, if neither of the above worked, fall back to
 989    * looking for combined ARGB -- we'll premultiply ourselves.
 990    */
 991
 992   pf.type = PictTypeDirect;
 993   pf.depth = 32;
 994   pf.direct.red = 16;
 995   pf.direct.green = 8;
 996   pf.direct.blue = 0;
 997   pf.direct.alphaMask = 0xff;
 998   pf.direct.alpha = 24;
 999
1000   *format = XRenderFindFormat (xdisplay,
1001                                (PictFormatType | PictFormatDepth |
1002                                 PictFormatRedMask | PictFormatRed |
1003                                 PictFormatGreenMask | PictFormatGreen |
1004                                 PictFormatBlueMask | PictFormatBlue |
1005                                 PictFormatAlphaMask | PictFormatAlpha),
1006                                &pf,
1007                                0);
1008   *mask = NULL;
1009
1010   if (*format)
1011     return GDK_X11_FORMAT_ARGB;
1012
1013   return GDK_X11_FORMAT_NONE;
1014 }
1015
1016 #if 0
1017 static void
1018 list_formats (XRenderPictFormat *pf)
1019 {
1020   gint i;
1021
1022   for (i=0 ;; i++)
1023     {
1024       XRenderPictFormat *pf = XRenderFindFormat (impl->xdisplay, 0, NULL, i);
1025       if (pf)
1026         {
1027           g_print ("%2d R-%#06x/%#06x G-%#06x/%#06x B-%#06x/%#06x A-%#06x/%#06x\n",
1028                    pf->depth,
1029                    pf->direct.red,
1030                    pf->direct.redMask,
1031                    pf->direct.green,
1032                    pf->direct.greenMask,
1033                    pf->direct.blue,
1034                    pf->direct.blueMask,
1035                    pf->direct.alpha,
1036                    pf->direct.alphaMask);
1037         }
1038       else
1039         break;
1040     }
1041 }
1042 #endif
1043
1044 void
1045 _gdk_x11_convert_to_format (guchar           *src_buf,
1046                             gint              src_rowstride,
1047                             guchar           *dest_buf,
1048                             gint              dest_rowstride,
1049                             GdkX11FormatType  dest_format,
1050                             GdkByteOrder      dest_byteorder,
1051                             gint              width,
1052                             gint              height)
1053 {
1054   gint i;
1055
1056   for (i=0; i < height; i++)
1057     {
1058       switch (dest_format)
1059         {
1060         case GDK_X11_FORMAT_EXACT_MASK:
1061           {
1062             memcpy (dest_buf + i * dest_rowstride,
1063                     src_buf + i * src_rowstride,
1064                     width * 4);
1065             break;
1066           }
1067         case GDK_X11_FORMAT_ARGB_MASK:
1068           {
1069             guchar *row = src_buf + i * src_rowstride;
1070             if (((gsize)row & 3) != 0)
1071               {
1072                 guchar *p = row;
1073                 guint32 *q = (guint32 *)(dest_buf + i * dest_rowstride);
1074                 guchar *end = p + 4 * width;
1075
1076                 while (p < end)
1077                   {
1078                     *q = (p[3] << 24) | (p[0] << 16) | (p[1] << 8) | p[2];
1079                     p += 4;
1080                     q++;
1081                   }
1082               }
1083             else
1084               {
1085                 guint32 *p = (guint32 *)row;
1086                 guint32 *q = (guint32 *)(dest_buf + i * dest_rowstride);
1087                 guint32 *end = p + width;
1088
1089 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
1090                 if (dest_byteorder == GDK_LSB_FIRST)
1091                   {
1092                     /* ABGR => ARGB */
1093
1094                     while (p < end)
1095                       {
1096                         *q = ( (*p & 0xff00ff00) |
1097                                ((*p & 0x000000ff) << 16) |
1098                                ((*p & 0x00ff0000) >> 16));
1099                         q++;
1100                         p++;
1101                       }
1102                   }
1103                 else
1104                   {
1105                     /* ABGR => BGRA */
1106
1107                     while (p < end)
1108                       {
1109                         *q = (((*p & 0xff000000) >> 24) |
1110                               ((*p & 0x00ffffff) << 8));
1111                         q++;
1112                         p++;
1113                       }
1114                   }
1115 #else /* G_BYTE_ORDER == G_BIG_ENDIAN */
1116                 if (dest_byteorder == GDK_LSB_FIRST)
1117                   {
1118                     /* RGBA => BGRA */
1119
1120                     while (p < end)
1121                       {
1122                         *q = ( (*p & 0x00ff00ff) |
1123                                ((*p & 0x0000ff00) << 16) |
1124                                ((*p & 0xff000000) >> 16));
1125                         q++;
1126                         p++;
1127                       }
1128                   }
1129                 else
1130                   {
1131                     /* RGBA => ARGB */
1132
1133                     while (p < end)
1134                       {
1135                         *q = (((*p & 0xffffff00) >> 8) |
1136                               ((*p & 0x000000ff) << 24));
1137                         q++;
1138                         p++;
1139                       }
1140                   }
1141 #endif /* G_BYTE_ORDER*/
1142               }
1143             break;
1144           }
1145         case GDK_X11_FORMAT_ARGB:
1146           {
1147             guchar *p = (src_buf + i * src_rowstride);
1148             guchar *q = (dest_buf + i * dest_rowstride);
1149             guchar *end = p + 4 * width;
1150             guint t1,t2,t3;
1151
1152 #define MULT(d,c,a,t) G_STMT_START { t = c * a; d = ((t >> 8) + t) >> 8; } G_STMT_END
1153
1154             if (dest_byteorder == GDK_LSB_FIRST)
1155               {
1156                 while (p < end)
1157                   {
1158                     MULT(q[0], p[2], p[3], t1);
1159                     MULT(q[1], p[1], p[3], t2);
1160                     MULT(q[2], p[0], p[3], t3);
1161                     q[3] = p[3];
1162                     p += 4;
1163                     q += 4;
1164                   }
1165               }
1166             else
1167               {
1168                 while (p < end)
1169                   {
1170                     q[0] = p[3];
1171                     MULT(q[1], p[0], p[3], t1);
1172                     MULT(q[2], p[1], p[3], t2);
1173                     MULT(q[3], p[2], p[3], t3);
1174                     p += 4;
1175                     q += 4;
1176                   }
1177               }
1178 #undef MULT
1179             break;
1180           }
1181         case GDK_X11_FORMAT_NONE:
1182           g_assert_not_reached ();
1183           break;
1184         }
1185     }
1186 }
1187
1188 static void
1189 draw_with_images (GdkDrawable       *drawable,
1190                   GdkGC             *gc,
1191                   GdkX11FormatType   format_type,
1192                   XRenderPictFormat *format,
1193                   XRenderPictFormat *mask_format,
1194                   guchar            *src_rgb,
1195                   gint               src_rowstride,
1196                   gint               dest_x,
1197                   gint               dest_y,
1198                   gint               width,
1199                   gint               height)
1200 {
1201   GdkScreen *screen = GDK_DRAWABLE_IMPL_X11 (drawable)->screen;
1202   Display *xdisplay = GDK_SCREEN_XDISPLAY (screen);
1203   GdkImage *image;
1204   GdkPixmap *pix;
1205   GdkGC *pix_gc;
1206   Picture pict;
1207   Picture dest_pict;
1208   Picture mask = None;
1209   gint x0, y0;
1210
1211   pix = gdk_pixmap_new (gdk_screen_get_root_window (screen), width, height, 32);
1212
1213   pict = XRenderCreatePicture (xdisplay,
1214                                GDK_PIXMAP_XID (pix),
1215                                format, 0, NULL);
1216   if (mask_format)
1217     mask = XRenderCreatePicture (xdisplay,
1218                                  GDK_PIXMAP_XID (pix),
1219                                  mask_format, 0, NULL);
1220
1221   dest_pict = gdk_x11_drawable_get_picture (drawable);
1222
1223   pix_gc = _gdk_drawable_get_scratch_gc (pix, FALSE);
1224
1225   for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
1226     {
1227       gint height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
1228       for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
1229         {
1230           gint xs0, ys0;
1231
1232           gint width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
1233
1234           image = _gdk_image_get_scratch (screen, width1, height1, 32, &xs0, &ys0);
1235
1236           _gdk_x11_convert_to_format (src_rgb + y0 * src_rowstride + 4 * x0, src_rowstride,
1237                                       (guchar *)image->mem + ys0 * image->bpl + xs0 * image->bpp, image->bpl,
1238                                       format_type, image->byte_order,
1239                                       width1, height1);
1240
1241           gdk_draw_image (pix, pix_gc,
1242                           image, xs0, ys0, x0, y0, width1, height1);
1243         }
1244     }
1245
1246   XRenderComposite (xdisplay, PictOpOver, pict, mask, dest_pict,
1247                     0, 0, 0, 0, dest_x, dest_y, width, height);
1248
1249   XRenderFreePicture (xdisplay, pict);
1250   if (mask)
1251     XRenderFreePicture (xdisplay, mask);
1252
1253   g_object_unref (pix);
1254 }
1255
1256 typedef struct _ShmPixmapInfo ShmPixmapInfo;
1257
1258 struct _ShmPixmapInfo
1259 {
1260   Display  *display;
1261   Pixmap    pix;
1262   Picture   pict;
1263   Picture   mask;
1264 };
1265
1266 static void
1267 shm_pixmap_info_destroy (gpointer data)
1268 {
1269   ShmPixmapInfo *info = data;
1270
1271   if (info->pict != None)
1272     XRenderFreePicture (info->display, info->pict);
1273   if (info->mask != None)
1274     XRenderFreePicture (info->display, info->mask);
1275
1276   g_free (data);
1277 }
1278
1279
1280 /* Returns FALSE if we can't get a shm pixmap */
1281 static gboolean
1282 get_shm_pixmap_for_image (Display           *xdisplay,
1283                           GdkImage          *image,
1284                           XRenderPictFormat *format,
1285                           XRenderPictFormat *mask_format,
1286                           Pixmap            *pix,
1287                           Picture           *pict,
1288                           Picture           *mask)
1289 {
1290   ShmPixmapInfo *info;
1291
1292   if (image->type != GDK_IMAGE_SHARED)
1293     return FALSE;
1294
1295   info = g_object_get_data (G_OBJECT (image), "gdk-x11-shm-pixmap");
1296   if (!info)
1297     {
1298       *pix = _gdk_x11_image_get_shm_pixmap (image);
1299
1300       if (!*pix)
1301         return FALSE;
1302
1303       info = g_new (ShmPixmapInfo, 1);
1304       info->display = xdisplay;
1305       info->pix = *pix;
1306
1307       info->pict = XRenderCreatePicture (xdisplay, info->pix,
1308                                          format, 0, NULL);
1309       if (mask_format)
1310         info->mask = XRenderCreatePicture (xdisplay, info->pix,
1311                                            mask_format, 0, NULL);
1312       else
1313         info->mask = None;
1314
1315       g_object_set_data_full (G_OBJECT (image), "gdk-x11-shm-pixmap", info,
1316           shm_pixmap_info_destroy);
1317     }
1318
1319   *pix = info->pix;
1320   *pict = info->pict;
1321   *mask = info->mask;
1322
1323   return TRUE;
1324 }
1325
1326 #ifdef USE_SHM
1327 /* Returns FALSE if drawing with ShmPixmaps is not possible */
1328 static gboolean
1329 draw_with_pixmaps (GdkDrawable       *drawable,
1330                    GdkGC             *gc,
1331                    GdkX11FormatType   format_type,
1332                    XRenderPictFormat *format,
1333                    XRenderPictFormat *mask_format,
1334                    guchar            *src_rgb,
1335                    gint               src_rowstride,
1336                    gint               dest_x,
1337                    gint               dest_y,
1338                    gint               width,
1339                    gint               height)
1340 {
1341   Display *xdisplay = GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (drawable)->screen);
1342   GdkImage *image;
1343   Pixmap pix;
1344   Picture pict;
1345   Picture dest_pict;
1346   Picture mask = None;
1347   gint x0, y0;
1348
1349   dest_pict = gdk_x11_drawable_get_picture (drawable);
1350
1351   for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
1352     {
1353       gint height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
1354       for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
1355         {
1356           gint xs0, ys0;
1357
1358           gint width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
1359
1360           image = _gdk_image_get_scratch (GDK_DRAWABLE_IMPL_X11 (drawable)->screen,
1361                                           width1, height1, 32, &xs0, &ys0);
1362           if (!get_shm_pixmap_for_image (xdisplay, image, format, mask_format, &pix, &pict, &mask))
1363             return FALSE;
1364
1365           _gdk_x11_convert_to_format (src_rgb + y0 * src_rowstride + 4 * x0, src_rowstride,
1366                                       (guchar *)image->mem + ys0 * image->bpl + xs0 * image->bpp, image->bpl,
1367                                       format_type, image->byte_order,
1368                                       width1, height1);
1369
1370           XRenderComposite (xdisplay, PictOpOver, pict, mask, dest_pict,
1371                             xs0, ys0, xs0, ys0, x0 + dest_x, y0 + dest_y,
1372                             width1, height1);
1373         }
1374     }
1375
1376   return TRUE;
1377 }
1378 #endif
1379
1380 static void
1381 gdk_x11_draw_pixbuf (GdkDrawable     *drawable,
1382                      GdkGC           *gc,
1383                      GdkPixbuf       *pixbuf,
1384                      gint             src_x,
1385                      gint             src_y,
1386                      gint             dest_x,
1387                      gint             dest_y,
1388                      gint             width,
1389                      gint             height,
1390                      GdkRgbDither     dither,
1391                      gint             x_dither,
1392                      gint             y_dither)
1393 {
1394   GdkX11FormatType format_type;
1395   XRenderPictFormat *format, *mask_format;
1396   gint rowstride;
1397 #ifdef USE_SHM
1398   gboolean use_pixmaps = TRUE;
1399 #endif /* USE_SHM */
1400
1401   format_type = select_format (gdk_drawable_get_display (drawable),
1402                                &format, &mask_format);
1403
1404   if (format_type == GDK_X11_FORMAT_NONE ||
1405       !gdk_pixbuf_get_has_alpha (pixbuf) ||
1406       gdk_drawable_get_depth (drawable) == 1 ||
1407       (dither == GDK_RGB_DITHER_MAX && gdk_drawable_get_depth (drawable) != 24) ||
1408       gdk_x11_drawable_get_picture (drawable) == None)
1409     {
1410       GdkDrawable *wrapper = GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper;
1411       GDK_DRAWABLE_CLASS (_gdk_drawable_impl_x11_parent_class)->draw_pixbuf (wrapper, gc, pixbuf,
1412                                                                              src_x, src_y, dest_x, dest_y,
1413                                                                              width, height,
1414                                                                              dither, x_dither, y_dither);
1415       return;
1416     }
1417
1418   gdk_x11_drawable_update_picture_clip (drawable, gc);
1419
1420   rowstride = gdk_pixbuf_get_rowstride (pixbuf);
1421
1422 #ifdef USE_SHM
1423   if (use_pixmaps)
1424     {
1425       if (!draw_with_pixmaps (drawable, gc,
1426                               format_type, format, mask_format,
1427                               gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * 4,
1428                               rowstride,
1429                               dest_x, dest_y, width, height))
1430         use_pixmaps = FALSE;
1431     }
1432
1433   if (!use_pixmaps)
1434 #endif /* USE_SHM */
1435     draw_with_images (drawable, gc,
1436                       format_type, format, mask_format,
1437                       gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * 4,
1438                       rowstride,
1439                       dest_x, dest_y, width, height);
1440 }
1441
1442 static void
1443 gdk_x11_cairo_surface_destroy (void *data)
1444 {
1445   GdkDrawableImplX11 *impl = data;
1446
1447   impl->cairo_surface = NULL;
1448 }
1449
1450 static cairo_surface_t *
1451 gdk_x11_ref_cairo_surface (GdkDrawable *drawable)
1452 {
1453   GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
1454
1455   if (GDK_IS_WINDOW_IMPL_X11 (drawable) &&
1456       GDK_WINDOW_DESTROYED (impl->wrapper))
1457     return NULL;
1458
1459   if (!impl->cairo_surface)
1460     {
1461       GdkVisual *visual = NULL;
1462       int width, height;
1463
1464       visual = gdk_drawable_get_visual (drawable);
1465
1466       gdk_drawable_get_size (drawable, &width, &height);
1467
1468       if (visual)
1469         impl->cairo_surface = cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (impl->screen),
1470                                                          impl->xid,
1471                                                          GDK_VISUAL_XVISUAL (visual),
1472                                                          width, height);
1473       else if (gdk_drawable_get_depth (drawable) == 1)
1474         impl->cairo_surface = cairo_xlib_surface_create_for_bitmap (GDK_SCREEN_XDISPLAY (impl->screen),
1475                                                                     impl->xid,
1476                                                                     GDK_SCREEN_XSCREEN (impl->screen),
1477                                                                     width, height);
1478       else
1479         {
1480           g_warning ("Using Cairo rendering requires the drawable argument to\n"
1481                      "have a specified colormap. All windows have a colormap,\n"
1482                      "however, pixmaps only have colormap by default if they\n"
1483                      "were created with a non-NULL window argument. Otherwise\n"
1484                      "a colormap must be set on them with gdk_drawable_set_colormap");
1485           return NULL;
1486         }
1487
1488       cairo_surface_set_user_data (impl->cairo_surface, &gdk_x11_cairo_key,
1489                                    drawable, gdk_x11_cairo_surface_destroy);
1490     }
1491   else
1492     cairo_surface_reference (impl->cairo_surface);
1493
1494   return impl->cairo_surface;
1495 }
1496
1497 #define __GDK_DRAWABLE_X11_C__
1498 #include "gdkaliasdef.c"