Pileus Git - ~andy/gtk/blob - gtk/gtkcellrendererpixbuf.c

   1 /* gtkcellrendererpixbuf.c
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   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 #include "config.h"
  21 #include <stdlib.h>
  22 #include "gtkcellrendererpixbuf.h"
  23 #include "gtkiconfactory.h"
  24 #include "gtkicontheme.h"
  25 #include "gtkintl.h"
  26 #include "gtkprivate.h"
  27
  28
  29 static void gtk_cell_renderer_pixbuf_get_property  (GObject                    *object,
  30                                                     guint                       param_id,
  31                                                     GValue                     *value,
  32                                                     GParamSpec                 *pspec);
  33 static void gtk_cell_renderer_pixbuf_set_property  (GObject                    *object,
  34                                                     guint                       param_id,
  35                                                     const GValue               *value,
  36                                                     GParamSpec                 *pspec);
  37 static void gtk_cell_renderer_pixbuf_finalize   (GObject                    *object);
  38 static void gtk_cell_renderer_pixbuf_create_stock_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
  39                                                           GtkWidget             *widget);
  40 static void gtk_cell_renderer_pixbuf_get_size   (GtkCellRenderer            *cell,
  41                                                  GtkWidget                  *widget,
  42                                                  const GdkRectangle         *rectangle,
  43                                                  gint                       *x_offset,
  44                                                  gint                       *y_offset,
  45                                                  gint                       *width,
  46                                                  gint                       *height);
  47 static void gtk_cell_renderer_pixbuf_render     (GtkCellRenderer            *cell,
  48                                                  cairo_t                    *cr,
  49                                                  GtkWidget                  *widget,
  50                                                  const GdkRectangle         *background_area,
  51                                                  const GdkRectangle         *cell_area,
  52                                                  GtkCellRendererState        flags);
  53
  54
  55 enum {
  56   PROP_0,
  57   PROP_PIXBUF,
  58   PROP_PIXBUF_EXPANDER_OPEN,
  59   PROP_PIXBUF_EXPANDER_CLOSED,
  60   PROP_STOCK_ID,
  61   PROP_STOCK_SIZE,
  62   PROP_STOCK_DETAIL,
  63   PROP_FOLLOW_STATE,
  64   PROP_ICON_NAME,
  65   PROP_GICON
  66 };
  67
  68
  69 struct _GtkCellRendererPixbufPrivate
  70 {
  71   GtkIconSize stock_size;
  72
  73   GdkPixbuf *pixbuf;
  74   GdkPixbuf *pixbuf_expander_open;
  75   GdkPixbuf *pixbuf_expander_closed;
  76
  77   GIcon *gicon;
  78
  79   gboolean follow_state;
  80
  81   gchar *stock_id;
  82   gchar *stock_detail;
  83   gchar *icon_name;
  84 };
  85
  86
  87 G_DEFINE_TYPE (GtkCellRendererPixbuf, gtk_cell_renderer_pixbuf, GTK_TYPE_CELL_RENDERER)
  88
  89
  90 static void
  91 gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
  92 {
  93   GtkCellRendererPixbufPrivate *priv;
  94
  95   cellpixbuf->priv = G_TYPE_INSTANCE_GET_PRIVATE (cellpixbuf,
  96                                                   GTK_TYPE_CELL_RENDERER_PIXBUF,
  97                                                   GtkCellRendererPixbufPrivate);
  98   priv = cellpixbuf->priv;
  99
 100   priv->stock_size = GTK_ICON_SIZE_MENU;
 101 }
 102
 103 static void
 104 gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
 105 {
 106   GObjectClass *object_class = G_OBJECT_CLASS (class);
 107   GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
 108
 109   object_class->finalize = gtk_cell_renderer_pixbuf_finalize;
 110
 111   object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
 112   object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
 113
 114   cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
 115   cell_class->render = gtk_cell_renderer_pixbuf_render;
 116
 117   g_object_class_install_property (object_class,
 118                                    PROP_PIXBUF,
 119                                    g_param_spec_object ("pixbuf",
 120                                                         P_("Pixbuf Object"),
 121                                                         P_("The pixbuf to render"),
 122                                                         GDK_TYPE_PIXBUF,
 123                                                         GTK_PARAM_READWRITE));
 124
 125   g_object_class_install_property (object_class,
 126                                    PROP_PIXBUF_EXPANDER_OPEN,
 127                                    g_param_spec_object ("pixbuf-expander-open",
 128                                                         P_("Pixbuf Expander Open"),
 129                                                         P_("Pixbuf for open expander"),
 130                                                         GDK_TYPE_PIXBUF,
 131                                                         GTK_PARAM_READWRITE));
 132
 133   g_object_class_install_property (object_class,
 134                                    PROP_PIXBUF_EXPANDER_CLOSED,
 135                                    g_param_spec_object ("pixbuf-expander-closed",
 136                                                         P_("Pixbuf Expander Closed"),
 137                                                         P_("Pixbuf for closed expander"),
 138                                                         GDK_TYPE_PIXBUF,
 139                                                         GTK_PARAM_READWRITE));
 140
 141   g_object_class_install_property (object_class,
 142                                    PROP_STOCK_ID,
 143                                    g_param_spec_string ("stock-id",
 144                                                         P_("Stock ID"),
 145                                                         P_("The stock ID of the stock icon to render"),
 146                                                         NULL,
 147                                                         GTK_PARAM_READWRITE));
 148
 149   g_object_class_install_property (object_class,
 150                                    PROP_STOCK_SIZE,
 151                                    g_param_spec_uint ("stock-size",
 152                                                       P_("Size"),
 153                                                       P_("The GtkIconSize value that specifies the size of the rendered icon"),
 154                                                       0,
 155                                                       G_MAXUINT,
 156                                                       GTK_ICON_SIZE_MENU,
 157                                                       GTK_PARAM_READWRITE));
 158
 159   g_object_class_install_property (object_class,
 160                                    PROP_STOCK_DETAIL,
 161                                    g_param_spec_string ("stock-detail",
 162                                                         P_("Detail"),
 163                                                         P_("Render detail to pass to the theme engine"),
 164                                                         NULL,
 165                                                         GTK_PARAM_READWRITE));
 166
 167
 168   /**
 169    * GtkCellRendererPixbuf:icon-name:
 170    *
 171    * The name of the themed icon to display.
 172    * This property only has an effect if not overridden by "stock_id"
 173    * or "pixbuf" properties.
 174    *
 175    * Since: 2.8
 176    */
 177   g_object_class_install_property (object_class,
 178                                    PROP_ICON_NAME,
 179                                    g_param_spec_string ("icon-name",
 180                                                         P_("Icon Name"),
 181                                                         P_("The name of the icon from the icon theme"),
 182                                                         NULL,
 183                                                         GTK_PARAM_READWRITE));
 184
 185   /**
 186    * GtkCellRendererPixbuf:follow-state:
 187    *
 188    * Specifies whether the rendered pixbuf should be colorized
 189    * according to the #GtkCellRendererState.
 190    *
 191    * Since: 2.8
 192    */
 193   g_object_class_install_property (object_class,
 194                                    PROP_FOLLOW_STATE,
 195                                    g_param_spec_boolean ("follow-state",
 196                                                          P_("Follow State"),
 197                                                          P_("Whether the rendered pixbuf should be "
 198                                                             "colorized according to the state"),
 199                                                          FALSE,
 200                                                          GTK_PARAM_READWRITE));
 201
 202   /**
 203    * GtkCellRendererPixbuf:gicon:
 204    *
 205    * The GIcon representing the icon to display.
 206    * If the icon theme is changed, the image will be updated
 207    * automatically.
 208    *
 209    * Since: 2.14
 210    */
 211   g_object_class_install_property (object_class,
 212                                    PROP_GICON,
 213                                    g_param_spec_object ("gicon",
 214                                                         P_("Icon"),
 215                                                         P_("The GIcon being displayed"),
 216                                                         G_TYPE_ICON,
 217                                                         GTK_PARAM_READWRITE));
 218
 219
 220
 221   g_type_class_add_private (object_class, sizeof (GtkCellRendererPixbufPrivate));
 222 }
 223
 224 static void
 225 gtk_cell_renderer_pixbuf_finalize (GObject *object)
 226 {
 227   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 228   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 229
 230   if (priv->pixbuf)
 231     g_object_unref (priv->pixbuf);
 232   if (priv->pixbuf_expander_open)
 233     g_object_unref (priv->pixbuf_expander_open);
 234   if (priv->pixbuf_expander_closed)
 235     g_object_unref (priv->pixbuf_expander_closed);
 236
 237   g_free (priv->stock_id);
 238   g_free (priv->stock_detail);
 239   g_free (priv->icon_name);
 240
 241   if (priv->gicon)
 242     g_object_unref (priv->gicon);
 243
 244   G_OBJECT_CLASS (gtk_cell_renderer_pixbuf_parent_class)->finalize (object);
 245 }
 246
 247 static void
 248 gtk_cell_renderer_pixbuf_get_property (GObject        *object,
 249                                        guint           param_id,
 250                                        GValue         *value,
 251                                        GParamSpec     *pspec)
 252 {
 253   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 254   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 255
 256   switch (param_id)
 257     {
 258     case PROP_PIXBUF:
 259       g_value_set_object (value, priv->pixbuf);
 260       break;
 261     case PROP_PIXBUF_EXPANDER_OPEN:
 262       g_value_set_object (value, priv->pixbuf_expander_open);
 263       break;
 264     case PROP_PIXBUF_EXPANDER_CLOSED:
 265       g_value_set_object (value, priv->pixbuf_expander_closed);
 266       break;
 267     case PROP_STOCK_ID:
 268       g_value_set_string (value, priv->stock_id);
 269       break;
 270     case PROP_STOCK_SIZE:
 271       g_value_set_uint (value, priv->stock_size);
 272       break;
 273     case PROP_STOCK_DETAIL:
 274       g_value_set_string (value, priv->stock_detail);
 275       break;
 276     case PROP_FOLLOW_STATE:
 277       g_value_set_boolean (value, priv->follow_state);
 278       break;
 279     case PROP_ICON_NAME:
 280       g_value_set_string (value, priv->icon_name);
 281       break;
 282     case PROP_GICON:
 283       g_value_set_object (value, priv->gicon);
 284       break;
 285     default:
 286       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 287       break;
 288     }
 289 }
 290
 291 static void
 292 gtk_cell_renderer_pixbuf_set_property (GObject      *object,
 293                                        guint         param_id,
 294                                        const GValue *value,
 295                                        GParamSpec   *pspec)
 296 {
 297   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 298   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 299
 300   switch (param_id)
 301     {
 302     case PROP_PIXBUF:
 303       if (priv->pixbuf)
 304         g_object_unref (priv->pixbuf);
 305       priv->pixbuf = (GdkPixbuf*) g_value_dup_object (value);
 306       if (priv->pixbuf)
 307         {
 308           if (priv->stock_id)
 309             {
 310               g_free (priv->stock_id);
 311               priv->stock_id = NULL;
 312               g_object_notify (object, "stock-id");
 313             }
 314           if (priv->icon_name)
 315             {
 316               g_free (priv->icon_name);
 317               priv->icon_name = NULL;
 318               g_object_notify (object, "icon-name");
 319             }
 320           if (priv->gicon)
 321             {
 322               g_object_unref (priv->gicon);
 323               priv->gicon = NULL;
 324               g_object_notify (object, "gicon");
 325             }
 326         }
 327       break;
 328     case PROP_PIXBUF_EXPANDER_OPEN:
 329       if (priv->pixbuf_expander_open)
 330         g_object_unref (priv->pixbuf_expander_open);
 331       priv->pixbuf_expander_open = (GdkPixbuf*) g_value_dup_object (value);
 332       break;
 333     case PROP_PIXBUF_EXPANDER_CLOSED:
 334       if (priv->pixbuf_expander_closed)
 335         g_object_unref (priv->pixbuf_expander_closed);
 336       priv->pixbuf_expander_closed = (GdkPixbuf*) g_value_dup_object (value);
 337       break;
 338     case PROP_STOCK_ID:
 339       if (priv->stock_id)
 340         {
 341           if (priv->pixbuf)
 342             {
 343               g_object_unref (priv->pixbuf);
 344               priv->pixbuf = NULL;
 345               g_object_notify (object, "pixbuf");
 346             }
 347           g_free (priv->stock_id);
 348         }
 349       priv->stock_id = g_value_dup_string (value);
 350       if (priv->stock_id)
 351         {
 352           if (priv->pixbuf)
 353             {
 354               g_object_unref (priv->pixbuf);
 355               priv->pixbuf = NULL;
 356               g_object_notify (object, "pixbuf");
 357             }
 358           if (priv->icon_name)
 359             {
 360               g_free (priv->icon_name);
 361               priv->icon_name = NULL;
 362               g_object_notify (object, "icon-name");
 363             }
 364           if (priv->gicon)
 365             {
 366               g_object_unref (priv->gicon);
 367               priv->gicon = NULL;
 368               g_object_notify (object, "gicon");
 369             }
 370         }
 371       break;
 372     case PROP_STOCK_SIZE:
 373       priv->stock_size = g_value_get_uint (value);
 374       break;
 375     case PROP_STOCK_DETAIL:
 376       g_free (priv->stock_detail);
 377       priv->stock_detail = g_value_dup_string (value);
 378       break;
 379     case PROP_ICON_NAME:
 380       if (priv->icon_name)
 381         {
 382           if (priv->pixbuf)
 383             {
 384               g_object_unref (priv->pixbuf);
 385               priv->pixbuf = NULL;
 386               g_object_notify (object, "pixbuf");
 387             }
 388           g_free (priv->icon_name);
 389         }
 390       priv->icon_name = g_value_dup_string (value);
 391       if (priv->icon_name)
 392         {
 393           if (priv->pixbuf)
 394             {
 395               g_object_unref (priv->pixbuf);
 396               priv->pixbuf = NULL;
 397               g_object_notify (object, "pixbuf");
 398             }
 399           if (priv->stock_id)
 400             {
 401               g_free (priv->stock_id);
 402               priv->stock_id = NULL;
 403               g_object_notify (object, "stock-id");
 404             }
 405           if (priv->gicon)
 406             {
 407               g_object_unref (priv->gicon);
 408               priv->gicon = NULL;
 409               g_object_notify (object, "gicon");
 410             }
 411         }
 412       break;
 413     case PROP_FOLLOW_STATE:
 414       priv->follow_state = g_value_get_boolean (value);
 415       break;
 416     case PROP_GICON:
 417       if (priv->gicon)
 418         {
 419           if (priv->pixbuf)
 420             {
 421               g_object_unref (priv->pixbuf);
 422               priv->pixbuf = NULL;
 423               g_object_notify (object, "pixbuf");
 424             }
 425           g_object_unref (priv->gicon);
 426         }
 427       priv->gicon = (GIcon *) g_value_dup_object (value);
 428       if (priv->gicon)
 429         {
 430           if (priv->pixbuf)
 431             {
 432               g_object_unref (priv->pixbuf);
 433               priv->pixbuf = NULL;
 434               g_object_notify (object, "pixbuf");
 435             }
 436           if (priv->stock_id)
 437             {
 438               g_free (priv->stock_id);
 439               priv->stock_id = NULL;
 440               g_object_notify (object, "stock-id");
 441             }
 442           if (priv->icon_name)
 443             {
 444               g_free (priv->icon_name);
 445               priv->icon_name = NULL;
 446               g_object_notify (object, "icon-name");
 447             }
 448         }
 449       break;
 450     default:
 451       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 452       break;
 453     }
 454 }
 455
 456 /**
 457  * gtk_cell_renderer_pixbuf_new:
 458  *
 459  * Creates a new #GtkCellRendererPixbuf. Adjust rendering
 460  * parameters using object properties. Object properties can be set
 461  * globally (with g_object_set()). Also, with #GtkTreeViewColumn, you
 462  * can bind a property to a value in a #GtkTreeModel. For example, you
 463  * can bind the "pixbuf" property on the cell renderer to a pixbuf value
 464  * in the model, thus rendering a different image in each row of the
 465  * #GtkTreeView.
 466  *
 467  * Return value: the new cell renderer
 468  **/
 469 GtkCellRenderer *
 470 gtk_cell_renderer_pixbuf_new (void)
 471 {
 472   return g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF, NULL);
 473 }
 474
 475 static void
 476 gtk_cell_renderer_pixbuf_create_stock_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
 477                                               GtkWidget             *widget)
 478 {
 479   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 480
 481   if (priv->pixbuf)
 482     g_object_unref (priv->pixbuf);
 483
 484   priv->pixbuf = gtk_widget_render_icon (widget,
 485                                                priv->stock_id,
 486                                                priv->stock_size,
 487                                                priv->stock_detail);
 488
 489   g_object_notify (G_OBJECT (cellpixbuf), "pixbuf");
 490 }
 491
 492 static void
 493 gtk_cell_renderer_pixbuf_create_themed_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
 494                                                GtkWidget             *widget)
 495 {
 496   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 497   GdkScreen *screen;
 498   GtkIconTheme *icon_theme;
 499   GtkSettings *settings;
 500   gint width, height;
 501   GtkIconInfo *info;
 502
 503   if (priv->pixbuf)
 504     {
 505       g_object_unref (priv->pixbuf);
 506       priv->pixbuf = NULL;
 507     }
 508
 509   screen = gtk_widget_get_screen (GTK_WIDGET (widget));
 510   icon_theme = gtk_icon_theme_get_for_screen (screen);
 511   settings = gtk_settings_get_for_screen (screen);
 512
 513   if (!gtk_icon_size_lookup_for_settings (settings,
 514                                           priv->stock_size,
 515                                           &width, &height))
 516     {
 517       g_warning ("Invalid icon size %u\n", priv->stock_size);
 518       width = height = 24;
 519     }
 520
 521   if (priv->icon_name)
 522     info = gtk_icon_theme_lookup_icon (icon_theme,
 523                                        priv->icon_name,
 524                                        MIN (width, height),
 525                                        GTK_ICON_LOOKUP_USE_BUILTIN);
 526   else if (priv->gicon)
 527     info = gtk_icon_theme_lookup_by_gicon (icon_theme,
 528                                            priv->gicon,
 529                                            MIN (width, height),
 530                                            GTK_ICON_LOOKUP_USE_BUILTIN);
 531   else
 532     info = NULL;
 533
 534   if (info)
 535     {
 536       GtkStyleContext *context;
 537
 538       context = gtk_widget_get_style_context (GTK_WIDGET (widget));
 539       priv->pixbuf = gtk_icon_info_load_symbolic_for_context (info,
 540                                                               context,
 541                                                               NULL,
 542                                                               NULL);
 543       gtk_icon_info_free (info);
 544     }
 545
 546   g_object_notify (G_OBJECT (cellpixbuf), "pixbuf");
 547 }
 548
 549 static GdkPixbuf *
 550 create_symbolic_pixbuf (GtkCellRendererPixbuf *cellpixbuf,
 551                         GtkWidget             *widget,
 552                         GtkStateType           state)
 553 {
 554   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 555   GdkScreen *screen;
 556   GtkIconTheme *icon_theme;
 557   GtkSettings *settings;
 558   gint width, height;
 559   GtkIconInfo *info;
 560   GdkPixbuf *pixbuf;
 561
 562   /* Not a named symbolic icon? */
 563   if (priv->icon_name) {
 564     if (!g_str_has_suffix (priv->icon_name, "-symbolic"))
 565       return NULL;
 566   } else if (priv->gicon) {
 567     const gchar * const *names;
 568     if (!G_IS_THEMED_ICON (priv->gicon))
 569       return NULL;
 570     names = g_themed_icon_get_names (G_THEMED_ICON (priv->gicon));
 571     if (names == NULL || !g_str_has_suffix (names[0], "-symbolic"))
 572       return NULL;
 573   } else {
 574     return NULL;
 575   }
 576
 577   screen = gtk_widget_get_screen (GTK_WIDGET (widget));
 578   icon_theme = gtk_icon_theme_get_for_screen (screen);
 579   settings = gtk_settings_get_for_screen (screen);
 580
 581   if (!gtk_icon_size_lookup_for_settings (settings,
 582                                           priv->stock_size,
 583                                           &width, &height))
 584     {
 585       g_warning ("Invalid icon size %u\n", priv->stock_size);
 586       width = height = 24;
 587     }
 588
 589
 590   if (priv->icon_name)
 591     info = gtk_icon_theme_lookup_icon (icon_theme,
 592                                        priv->icon_name,
 593                                        MIN (width, height),
 594                                        GTK_ICON_LOOKUP_USE_BUILTIN);
 595   else if (priv->gicon)
 596     info = gtk_icon_theme_lookup_by_gicon (icon_theme,
 597                                            priv->gicon,
 598                                            MIN (width, height),
 599                                            GTK_ICON_LOOKUP_USE_BUILTIN);
 600   else
 601     return NULL;
 602
 603   if (info)
 604     {
 605       GtkStyleContext *context;
 606
 607       context = gtk_widget_get_style_context (GTK_WIDGET (widget));
 608       pixbuf = gtk_icon_info_load_symbolic_for_context (info,
 609                                                         context,
 610                                                         NULL,
 611                                                         NULL);
 612       gtk_icon_info_free (info);
 613       return pixbuf;
 614     }
 615
 616   return NULL;
 617 }
 618
 619 static GdkPixbuf *
 620 create_colorized_pixbuf (GdkPixbuf *src,
 621                          GdkColor  *new_color)
 622 {
 623   gint i, j;
 624   gint width, height, has_alpha, src_row_stride, dst_row_stride;
 625   gint red_value, green_value, blue_value;
 626   guchar *target_pixels;
 627   guchar *original_pixels;
 628   guchar *pixsrc;
 629   guchar *pixdest;
 630   GdkPixbuf *dest;
 631
 632   red_value = new_color->red / 255.0;
 633   green_value = new_color->green / 255.0;
 634   blue_value = new_color->blue / 255.0;
 635
 636   dest = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (src),
 637                          gdk_pixbuf_get_has_alpha (src),
 638                          gdk_pixbuf_get_bits_per_sample (src),
 639                          gdk_pixbuf_get_width (src),
 640                          gdk_pixbuf_get_height (src));
 641
 642   has_alpha = gdk_pixbuf_get_has_alpha (src);
 643   width = gdk_pixbuf_get_width (src);
 644   height = gdk_pixbuf_get_height (src);
 645   src_row_stride = gdk_pixbuf_get_rowstride (src);
 646   dst_row_stride = gdk_pixbuf_get_rowstride (dest);
 647   target_pixels = gdk_pixbuf_get_pixels (dest);
 648   original_pixels = gdk_pixbuf_get_pixels (src);
 649
 650   for (i = 0; i < height; i++) {
 651     pixdest = target_pixels + i*dst_row_stride;
 652     pixsrc = original_pixels + i*src_row_stride;
 653     for (j = 0; j < width; j++) {
 654       *pixdest++ = (*pixsrc++ * red_value) >> 8;
 655       *pixdest++ = (*pixsrc++ * green_value) >> 8;
 656       *pixdest++ = (*pixsrc++ * blue_value) >> 8;
 657       if (has_alpha) {
 658         *pixdest++ = *pixsrc++;
 659       }
 660     }
 661   }
 662   return dest;
 663 }
 664
 665
 666 static void
 667 gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer    *cell,
 668                                    GtkWidget          *widget,
 669                                    const GdkRectangle *cell_area,
 670                                    gint               *x_offset,
 671                                    gint               *y_offset,
 672                                    gint               *width,
 673                                    gint               *height)
 674 {
 675   GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 676   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 677   gint pixbuf_width  = 0;
 678   gint pixbuf_height = 0;
 679   gint calc_width;
 680   gint calc_height;
 681   gint xpad, ypad;
 682
 683   if (!priv->pixbuf)
 684     {
 685       if (priv->stock_id)
 686         gtk_cell_renderer_pixbuf_create_stock_pixbuf (cellpixbuf, widget);
 687       else if (priv->icon_name || priv->gicon)
 688         gtk_cell_renderer_pixbuf_create_themed_pixbuf (cellpixbuf, widget);
 689     }
 690
 691   if (priv->pixbuf)
 692     {
 693       pixbuf_width  = gdk_pixbuf_get_width (priv->pixbuf);
 694       pixbuf_height = gdk_pixbuf_get_height (priv->pixbuf);
 695     }
 696   if (priv->pixbuf_expander_open)
 697     {
 698       pixbuf_width  = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_open));
 699       pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_open));
 700     }
 701   if (priv->pixbuf_expander_closed)
 702     {
 703       pixbuf_width  = MAX (pixbuf_width, gdk_pixbuf_get_width (priv->pixbuf_expander_closed));
 704       pixbuf_height = MAX (pixbuf_height, gdk_pixbuf_get_height (priv->pixbuf_expander_closed));
 705     }
 706
 707   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 708   calc_width  = (gint) xpad * 2 + pixbuf_width;
 709   calc_height = (gint) ypad * 2 + pixbuf_height;
 710
 711   if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
 712     {
 713       gfloat xalign, yalign;
 714
 715       gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
 716       if (x_offset)
 717         {
 718           *x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
 719                         (1.0 - xalign) : xalign) *
 720                        (cell_area->width - calc_width));
 721           *x_offset = MAX (*x_offset, 0);
 722         }
 723       if (y_offset)
 724         {
 725           *y_offset = (yalign *
 726                        (cell_area->height - calc_height));
 727           *y_offset = MAX (*y_offset, 0);
 728         }
 729     }
 730   else
 731     {
 732       if (x_offset) *x_offset = 0;
 733       if (y_offset) *y_offset = 0;
 734     }
 735
 736   if (width)
 737     *width = calc_width;
 738
 739   if (height)
 740     *height = calc_height;
 741 }
 742
 743 static void
 744 gtk_cell_renderer_pixbuf_render (GtkCellRenderer      *cell,
 745                                  cairo_t              *cr,
 746                                  GtkWidget            *widget,
 747                                  const GdkRectangle   *background_area,
 748                                  const GdkRectangle   *cell_area,
 749                                  GtkCellRendererState  flags)
 750
 751 {
 752   GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 753   GtkCellRendererPixbufPrivate *priv = cellpixbuf->priv;
 754   GdkPixbuf *pixbuf;
 755   GdkPixbuf *invisible = NULL;
 756   GdkPixbuf *colorized = NULL;
 757   GdkPixbuf *symbolic = NULL;
 758   GdkRectangle pix_rect;
 759   GdkRectangle draw_rect;
 760   gboolean is_expander;
 761   gint xpad, ypad;
 762
 763   gtk_cell_renderer_pixbuf_get_size (cell, widget, (GdkRectangle *) cell_area,
 764                                      &pix_rect.x,
 765                                      &pix_rect.y,
 766                                      &pix_rect.width,
 767                                      &pix_rect.height);
 768
 769   gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 770   pix_rect.x += cell_area->x + xpad;
 771   pix_rect.y += cell_area->y + ypad;
 772   pix_rect.width  -= xpad * 2;
 773   pix_rect.height -= ypad * 2;
 774
 775   if (!gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect))
 776     return;
 777
 778   pixbuf = priv->pixbuf;
 779
 780   g_object_get (cell, "is-expander", &is_expander, NULL);
 781   if (is_expander)
 782     {
 783       gboolean is_expanded;
 784
 785       g_object_get (cell, "is-expanded", &is_expanded, NULL);
 786
 787       if (is_expanded &&
 788           priv->pixbuf_expander_open != NULL)
 789         pixbuf = priv->pixbuf_expander_open;
 790       else if (!is_expanded &&
 791                priv->pixbuf_expander_closed != NULL)
 792         pixbuf = priv->pixbuf_expander_closed;
 793     }
 794
 795   if (!pixbuf)
 796     return;
 797
 798   if (gtk_widget_get_state (widget) == GTK_STATE_INSENSITIVE ||
 799       !gtk_cell_renderer_get_sensitive (cell))
 800     {
 801       GtkIconSource *source;
 802
 803       source = gtk_icon_source_new ();
 804       gtk_icon_source_set_pixbuf (source, pixbuf);
 805       /* The size here is arbitrary; since size isn't
 806        * wildcarded in the source, it isn't supposed to be
 807        * scaled by the engine function
 808        */
 809       gtk_icon_source_set_size (source, GTK_ICON_SIZE_SMALL_TOOLBAR);
 810       gtk_icon_source_set_size_wildcarded (source, FALSE);
 811
 812      invisible = gtk_style_render_icon (gtk_widget_get_style (widget),
 813                                         source,
 814                                         gtk_widget_get_direction (widget),
 815                                         GTK_STATE_INSENSITIVE,
 816                                         /* arbitrary */
 817                                         (GtkIconSize)-1,
 818                                         widget,
 819                                         "gtkcellrendererpixbuf");
 820
 821      gtk_icon_source_free (source);
 822
 823      pixbuf = invisible;
 824     }
 825   else if (priv->follow_state &&
 826            (flags & (GTK_CELL_RENDERER_SELECTED|GTK_CELL_RENDERER_PRELIT)) != 0)
 827     {
 828       GtkStateType state;
 829
 830       if ((flags & GTK_CELL_RENDERER_SELECTED) != 0)
 831         {
 832           if (gtk_widget_has_focus (widget))
 833             state = GTK_STATE_SELECTED;
 834           else
 835             state = GTK_STATE_ACTIVE;
 836         }
 837       else
 838         state = GTK_STATE_PRELIGHT;
 839
 840       symbolic = create_symbolic_pixbuf (cellpixbuf, widget, state);
 841       if (!symbolic) {
 842         colorized = create_colorized_pixbuf (pixbuf,
 843                                              &gtk_widget_get_style (widget)->base[state]);
 844
 845         pixbuf = colorized;
 846       } else {
 847         pixbuf = symbolic;
 848       }
 849     }
 850
 851   gdk_cairo_set_source_pixbuf (cr, pixbuf, pix_rect.x, pix_rect.y);
 852   gdk_cairo_rectangle (cr, &draw_rect);
 853   cairo_fill (cr);
 854
 855   if (invisible)
 856     g_object_unref (invisible);
 857
 858   if (colorized)
 859     g_object_unref (colorized);
 860
 861   if (symbolic)
 862     g_object_unref (symbolic);
 863 }