src/widgets/icon.cpp

   1 /** \file
   2  * SPIcon: Generic icon widget
   3  */
   4 /*
   5  * Author:
   6  *   Lauris Kaplinski <lauris@kaplinski.com>
   7  *   Jon A. Cruz <jon@joncruz.org>
   8  *
   9  * Copyright (C) 2002 Lauris Kaplinski
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 # include "config.h"
  16 #endif
  17
  18 #include <cstring>
  19 #include <glib/gmem.h>
  20 #include <gtk/gtk.h>
  21 #include <gtkmm.h>
  22
  23 #include "path-prefix.h"
  24 #include "preferences.h"
  25 #include "inkscape.h"
  26 #include "document.h"
  27 #include "sp-item.h"
  28 #include "display/nr-arena.h"
  29 #include "display/nr-arena-item.h"
  30 #include "io/sys.h"
  31
  32 #include "icon.h"
  33
  34 static void sp_icon_class_init(SPIconClass *klass);
  35 static void sp_icon_init(SPIcon *icon);
  36 static void sp_icon_dispose(GObject *object);
  37
  38 static void sp_icon_reset(SPIcon *icon);
  39 static void sp_icon_clear(SPIcon *icon);
  40
  41 static void sp_icon_size_request(GtkWidget *widget, GtkRequisition *requisition);
  42 static void sp_icon_size_allocate(GtkWidget *widget, GtkAllocation *allocation);
  43 static int sp_icon_expose(GtkWidget *widget, GdkEventExpose *event);
  44
  45 static void sp_icon_paint(SPIcon *icon, GdkRectangle const *area);
  46
  47 static void sp_icon_screen_changed( GtkWidget *widget, GdkScreen *previous_screen );
  48 static void sp_icon_style_set( GtkWidget *widget, GtkStyle *previous_style );
  49 static void sp_icon_theme_changed( SPIcon *icon );
  50
  51 static GdkPixbuf *sp_icon_image_load_pixmap(gchar const *name, unsigned lsize, unsigned psize);
  52 static GdkPixbuf *sp_icon_image_load_svg(gchar const *name, GtkIconSize lsize, unsigned psize);
  53
  54 static void sp_icon_overlay_pixels( guchar *px, int width, int height, int stride,
  55                                     unsigned r, unsigned g, unsigned b );
  56
  57 static void injectCustomSize();
  58
  59 static GtkWidgetClass *parent_class;
  60
  61 static bool sizeDirty = true;
  62
  63 static bool sizeMapDone = false;
  64 static GtkIconSize iconSizeLookup[] = {
  65     GTK_ICON_SIZE_INVALID,
  66     GTK_ICON_SIZE_MENU,
  67     GTK_ICON_SIZE_SMALL_TOOLBAR,
  68     GTK_ICON_SIZE_LARGE_TOOLBAR,
  69     GTK_ICON_SIZE_BUTTON,
  70     GTK_ICON_SIZE_DND,
  71     GTK_ICON_SIZE_DIALOG,
  72     GTK_ICON_SIZE_MENU, // for Inkscape::ICON_SIZE_DECORATION
  73 };
  74
  75 class IconCacheItem
  76 {
  77 public:
  78     IconCacheItem( GtkIconSize lsize, GdkPixbuf* pb ) :
  79         _lsize( lsize ),
  80         _pb( pb )
  81     {}
  82     GtkIconSize _lsize;
  83     GdkPixbuf* _pb;
  84 };
  85
  86 static Glib::RefPtr<Gtk::IconFactory> inkyIcons;
  87
  88 GType
  89 sp_icon_get_type()
  90 {
  91     //TODO: switch to GObject
  92     // GtkType and such calls were deprecated a while back with the
  93     // introduction of GObject as a separate layer, with GType instead. --JonCruz
  94
  95     static GType type = 0;
  96     if (!type) {
  97         GTypeInfo info = {
  98             sizeof(SPIconClass),
  99             NULL,
 100             NULL,
 101             (GClassInitFunc) sp_icon_class_init,
 102             NULL,
 103             NULL,
 104             sizeof(SPIcon),
 105             0,
 106             (GInstanceInitFunc) sp_icon_init,
 107             NULL
 108         };
 109         type = g_type_register_static(GTK_TYPE_WIDGET, "SPIcon", &info, (GTypeFlags)0);
 110     }
 111     return type;
 112 }
 113
 114 static void
 115 sp_icon_class_init(SPIconClass *klass)
 116 {
 117     GObjectClass *object_class;
 118     GtkWidgetClass *widget_class;
 119
 120     object_class = (GObjectClass *) klass;
 121     widget_class = (GtkWidgetClass *) klass;
 122
 123     parent_class = (GtkWidgetClass*)g_type_class_peek_parent(klass);
 124
 125     object_class->dispose = sp_icon_dispose;
 126
 127     widget_class->size_request = sp_icon_size_request;
 128     widget_class->size_allocate = sp_icon_size_allocate;
 129     widget_class->expose_event = sp_icon_expose;
 130     widget_class->screen_changed = sp_icon_screen_changed;
 131     widget_class->style_set = sp_icon_style_set;
 132 }
 133
 134
 135 static void
 136 sp_icon_init(SPIcon *icon)
 137 {
 138     GTK_WIDGET_FLAGS(icon) |= GTK_NO_WINDOW;
 139     icon->lsize = Inkscape::ICON_SIZE_BUTTON;
 140     icon->psize = 0;
 141     icon->name = 0;
 142     icon->pb = 0;
 143     icon->pb_faded = 0;
 144 }
 145
 146 static void
 147 sp_icon_dispose(GObject *object)
 148 {
 149     SPIcon *icon = SP_ICON(object);
 150     sp_icon_clear(icon);
 151     if ( icon->name ) {
 152         g_free( icon->name );
 153         icon->name = 0;
 154     }
 155
 156     ((GObjectClass *) (parent_class))->dispose(object);
 157 }
 158
 159 static void sp_icon_reset( SPIcon *icon ) {
 160     icon->psize = 0;
 161     sp_icon_clear(icon);
 162 }
 163
 164 static void sp_icon_clear( SPIcon *icon ) {
 165     if (icon->pb) {
 166         g_object_unref(G_OBJECT(icon->pb));
 167         icon->pb = NULL;
 168     }
 169     if (icon->pb_faded) {
 170         g_object_unref(G_OBJECT(icon->pb_faded));
 171         icon->pb_faded = NULL;
 172     }
 173 }
 174
 175 static void
 176 sp_icon_size_request(GtkWidget *widget, GtkRequisition *requisition)
 177 {
 178     SPIcon const *icon = SP_ICON(widget);
 179
 180     int const size = ( icon->psize
 181                        ? icon->psize
 182                        : sp_icon_get_phys_size(icon->lsize) );
 183     requisition->width = size;
 184     requisition->height = size;
 185 }
 186
 187 static void
 188 sp_icon_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
 189 {
 190     widget->allocation = *allocation;
 191
 192     if (GTK_WIDGET_DRAWABLE(widget)) {
 193         gtk_widget_queue_draw(widget);
 194     }
 195 }
 196
 197 static int sp_icon_expose(GtkWidget *widget, GdkEventExpose *event)
 198 {
 199     if ( GTK_WIDGET_DRAWABLE(widget) ) {
 200         SPIcon *icon = SP_ICON(widget);
 201         if ( !icon->pb ) {
 202             sp_icon_fetch_pixbuf( icon );
 203         }
 204
 205         sp_icon_paint(SP_ICON(widget), &event->area);
 206     }
 207
 208     return TRUE;
 209 }
 210
 211 // PUBLIC CALL:
 212 void sp_icon_fetch_pixbuf( SPIcon *icon )
 213 {
 214     if ( icon ) {
 215         if ( !icon->pb ) {
 216             icon->psize = sp_icon_get_phys_size(icon->lsize);
 217             GtkIconTheme *theme = gtk_icon_theme_get_default();
 218
 219             GdkPixbuf *pb = NULL;
 220             if (gtk_icon_theme_has_icon(theme, icon->name)) {
 221                 pb = gtk_icon_theme_load_icon(theme, icon->name, icon->psize, (GtkIconLookupFlags) 0, NULL);
 222             }
 223             if (!pb) {
 224                 pb = sp_icon_image_load_svg( icon->name, Inkscape::getRegisteredIconSize(icon->lsize), icon->psize );
 225                 // if this was loaded from SVG, add it as a builtin icon
 226                 gtk_icon_theme_add_builtin_icon(icon->name, icon->psize, pb);
 227             }
 228             if (!pb) {
 229                 pb = sp_icon_image_load_pixmap( icon->name, icon->lsize, icon->psize );
 230             }
 231             if ( pb ) {
 232                 icon->pb = pb;
 233                 icon->pb_faded = gdk_pixbuf_copy(icon->pb);
 234                 gdk_pixbuf_saturate_and_pixelate(icon->pb, icon->pb_faded, 0.5, TRUE);
 235             } else {
 236                 /* TODO: We should do something more useful if we can't load the image. */
 237                 g_warning ("failed to load icon '%s'", icon->name);
 238             }
 239         }
 240     }
 241 }
 242
 243 static void sp_icon_screen_changed( GtkWidget *widget, GdkScreen *previous_screen )
 244 {
 245     if ( GTK_WIDGET_CLASS( parent_class )->screen_changed ) {
 246         GTK_WIDGET_CLASS( parent_class )->screen_changed( widget, previous_screen );
 247     }
 248     SPIcon *icon = SP_ICON(widget);
 249     sp_icon_theme_changed(icon);
 250 }
 251
 252 static void sp_icon_style_set( GtkWidget *widget, GtkStyle *previous_style )
 253 {
 254     if ( GTK_WIDGET_CLASS( parent_class )->style_set ) {
 255         GTK_WIDGET_CLASS( parent_class )->style_set( widget, previous_style );
 256     }
 257     SPIcon *icon = SP_ICON(widget);
 258     sp_icon_theme_changed(icon);
 259 }
 260
 261 static void sp_icon_theme_changed( SPIcon *icon )
 262 {
 263     //g_message("Got a change bump for this icon");
 264     sizeDirty = true;
 265     sp_icon_reset(icon);
 266     gtk_widget_queue_draw( GTK_WIDGET(icon) );
 267 }
 268
 269
 270 static Glib::ustring icon_cache_key(gchar const *name, unsigned psize);
 271 static GdkPixbuf *get_cached_pixbuf(Glib::ustring const &key);
 272
 273 static GtkWidget *
 274 sp_icon_new_full( Inkscape::IconSize lsize, gchar const *name )
 275 {
 276     GtkWidget *widget = 0;
 277     gint trySize = CLAMP( static_cast<gint>(lsize), 0, static_cast<gint>(G_N_ELEMENTS(iconSizeLookup) - 1) );
 278     if ( !sizeMapDone ) {
 279         injectCustomSize();
 280     }
 281     GtkIconSize mappedSize = iconSizeLookup[trySize];
 282
 283     GtkStockItem stock;
 284     gboolean stockFound = gtk_stock_lookup( name, &stock );
 285
 286     if ( stockFound ) {
 287         GtkWidget *img = gtk_image_new_from_stock( name, mappedSize );
 288         widget = GTK_WIDGET(img);
 289     }
 290
 291     if ( !widget ) {
 292         //g_message("Creating an SPIcon instance for %s:%d", name, (int)lsize);
 293         SPIcon *icon = (SPIcon *)g_object_new(SP_TYPE_ICON, NULL);
 294         icon->lsize = lsize;
 295         icon->name = g_strdup(name);
 296         icon->psize = sp_icon_get_phys_size(lsize);
 297
 298         widget = GTK_WIDGET(icon);
 299     }
 300
 301     return widget;
 302 }
 303
 304 GtkWidget *
 305 sp_icon_new( Inkscape::IconSize lsize, gchar const *name )
 306 {
 307     return sp_icon_new_full( lsize, name );
 308 }
 309
 310 // PUBLIC CALL:
 311 Gtk::Widget *sp_icon_get_icon( Glib::ustring const &oid, Inkscape::IconSize size )
 312 {
 313     Gtk::Widget *result = 0;
 314     GtkWidget *widget = sp_icon_new_full( static_cast<Inkscape::IconSize>(Inkscape::getRegisteredIconSize(size)), oid.c_str() );
 315
 316     if ( widget ) {
 317         if ( GTK_IS_IMAGE(widget) ) {
 318             GtkImage *img = GTK_IMAGE(widget);
 319             result = Glib::wrap( img );
 320         } else {
 321             result = Glib::wrap( widget );
 322         }
 323     }
 324
 325     return result;
 326 }
 327
 328 GtkIconSize
 329 sp_icon_get_gtk_size(int size)
 330 {
 331     static GtkIconSize sizemap[64] = {(GtkIconSize)0};
 332     size = CLAMP(size, 4, 63);
 333     if (!sizemap[size]) {
 334         static int count = 0;
 335         char c[64];
 336         g_snprintf(c, 64, "InkscapeIcon%d", count++);
 337         sizemap[size] = gtk_icon_size_register(c, size, size);
 338     }
 339     return sizemap[size];
 340 }
 341
 342
 343 static void injectCustomSize()
 344 {
 345     // TODO - still need to handle the case of theme changes and resize, especially as we can't re-register a string.
 346     if ( !sizeMapDone )
 347     {
 348         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 349         bool dump = prefs->getBool( "/debug/icons/dumpDefault");
 350         gint width = 0;
 351         gint height = 0;
 352         if ( gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &width, &height ) ) {
 353             gint newWidth = ((width * 3) / 4);
 354             gint newHeight = ((height * 3) / 4);
 355             GtkIconSize newSizeEnum = gtk_icon_size_register( "inkscape-decoration", newWidth, newHeight );
 356             if ( newSizeEnum ) {
 357                 if ( dump ) {
 358                     g_message("Registered (%d, %d) <= (%d, %d) as index %d", newWidth, newHeight, width, height, newSizeEnum);
 359                 }
 360                 guint index = static_cast<guint>(Inkscape::ICON_SIZE_DECORATION);
 361                 if ( index < G_N_ELEMENTS(iconSizeLookup) ) {
 362                     iconSizeLookup[index] = newSizeEnum;
 363                 } else if ( dump ) {
 364                     g_message("size lookup array too small to store entry");
 365                 }
 366             }
 367         }
 368         sizeMapDone = true;
 369     }
 370
 371     static bool hit = false;
 372     if ( !hit ) {
 373         hit = true;
 374         inkyIcons = Gtk::IconFactory::create();
 375         inkyIcons->add_default();
 376     }
 377 }
 378
 379 GtkIconSize Inkscape::getRegisteredIconSize( Inkscape::IconSize size )
 380 {
 381     GtkIconSize other = GTK_ICON_SIZE_MENU;
 382     injectCustomSize();
 383     size = CLAMP( size, Inkscape::ICON_SIZE_MENU, Inkscape::ICON_SIZE_DECORATION );
 384     if ( size == Inkscape::ICON_SIZE_DECORATION ) {
 385         other = gtk_icon_size_from_name("inkscape-decoration");
 386     } else {
 387         other = static_cast<GtkIconSize>(size);
 388     }
 389
 390     return other;
 391 }
 392
 393
 394 // PUBLIC CALL:
 395 int sp_icon_get_phys_size(int size)
 396 {
 397     static bool init = false;
 398     static int lastSys[Inkscape::ICON_SIZE_DECORATION + 1];
 399     static int vals[Inkscape::ICON_SIZE_DECORATION + 1];
 400
 401     size = CLAMP( size, GTK_ICON_SIZE_MENU, Inkscape::ICON_SIZE_DECORATION );
 402
 403     if ( !sizeMapDone ) {
 404         injectCustomSize();
 405     }
 406
 407     if ( sizeDirty && init ) {
 408         GtkIconSize const gtkSizes[] = {
 409             GTK_ICON_SIZE_MENU,
 410             GTK_ICON_SIZE_SMALL_TOOLBAR,
 411             GTK_ICON_SIZE_LARGE_TOOLBAR,
 412             GTK_ICON_SIZE_BUTTON,
 413             GTK_ICON_SIZE_DND,
 414             GTK_ICON_SIZE_DIALOG,
 415             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 416                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 417                 GTK_ICON_SIZE_MENU
 418         };
 419         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes) && init; ++i) {
 420             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 421
 422             g_assert( val_ix < G_N_ELEMENTS(vals) );
 423
 424             gint width = 0;
 425             gint height = 0;
 426             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 427                 init &= (lastSys[val_ix] == std::max(width, height));
 428             }
 429         }
 430     }
 431
 432     if ( !init ) {
 433         sizeDirty = false;
 434         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 435         bool dump = prefs->getBool("/debug/icons/dumpDefault");
 436
 437         if ( dump ) {
 438             g_message( "Default icon sizes:" );
 439         }
 440         memset( vals, 0, sizeof(vals) );
 441         memset( lastSys, 0, sizeof(lastSys) );
 442         GtkIconSize const gtkSizes[] = {
 443             GTK_ICON_SIZE_MENU,
 444             GTK_ICON_SIZE_SMALL_TOOLBAR,
 445             GTK_ICON_SIZE_LARGE_TOOLBAR,
 446             GTK_ICON_SIZE_BUTTON,
 447             GTK_ICON_SIZE_DND,
 448             GTK_ICON_SIZE_DIALOG,
 449             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 450                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 451                 GTK_ICON_SIZE_MENU
 452         };
 453         gchar const *const names[] = {
 454             "GTK_ICON_SIZE_MENU",
 455             "GTK_ICON_SIZE_SMALL_TOOLBAR",
 456             "GTK_ICON_SIZE_LARGE_TOOLBAR",
 457             "GTK_ICON_SIZE_BUTTON",
 458             "GTK_ICON_SIZE_DND",
 459             "GTK_ICON_SIZE_DIALOG",
 460             "inkscape-decoration"
 461         };
 462
 463         GtkWidget *icon = (GtkWidget *)g_object_new(SP_TYPE_ICON, NULL);
 464
 465         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes); ++i) {
 466             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 467
 468             g_assert( val_ix < G_N_ELEMENTS(vals) );
 469
 470             gint width = 0;
 471             gint height = 0;
 472             bool used = false;
 473             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 474                 vals[val_ix] = std::max(width, height);
 475                 lastSys[val_ix] = vals[val_ix];
 476                 used = true;
 477             }
 478             if (dump) {
 479                 g_message(" =--  %u  size:%d  %c(%d, %d)   '%s'",
 480                           i, gtkSizes[i],
 481                           ( used ? ' ' : 'X' ), width, height, names[i]);
 482             }
 483             gchar const *id = GTK_STOCK_OPEN;
 484             GdkPixbuf *pb = gtk_widget_render_icon( icon, id, gtkSizes[i], NULL);
 485             if (pb) {
 486                 width = gdk_pixbuf_get_width(pb);
 487                 height = gdk_pixbuf_get_height(pb);
 488                 int newSize = std::max( width, height );
 489                 // TODO perhaps check a few more stock icons to get a range on sizes.
 490                 if ( newSize > 0 ) {
 491                     vals[val_ix] = newSize;
 492                 }
 493                 if (dump) {
 494                     g_message("      %u  size:%d   (%d, %d)", i, gtkSizes[i], width, height);
 495                 }
 496
 497                 g_object_unref(G_OBJECT(pb));
 498             }
 499         }
 500         //g_object_unref(icon);
 501         init = true;
 502     }
 503
 504     // Fixup workaround
 505     if ((size == GTK_ICON_SIZE_MENU) || (size == GTK_ICON_SIZE_SMALL_TOOLBAR) || (size == GTK_ICON_SIZE_LARGE_TOOLBAR)) {
 506         gint width = 0;
 507         gint height = 0;
 508         if ( gtk_icon_size_lookup( static_cast<GtkIconSize>(size), &width, &height ) ) {
 509             vals[size] = std::max( width, height );
 510         }
 511     }
 512
 513     return vals[size];
 514 }
 515
 516 static void sp_icon_paint(SPIcon *icon, GdkRectangle const *area)
 517 {
 518     GtkWidget &widget = *GTK_WIDGET(icon);
 519
 520     GdkPixbuf *image = GTK_WIDGET_IS_SENSITIVE(&widget) ? icon->pb : icon->pb_faded;
 521
 522     if (image) {
 523         int const padx = ( ( widget.allocation.width > icon->psize )
 524                            ? ( widget.allocation.width - icon->psize ) / 2
 525                            : 0 );
 526         int const pady = ( ( widget.allocation.height > icon->psize )
 527                            ? ( widget.allocation.height - icon->psize ) / 2
 528                            : 0 );
 529
 530         int const x0 = std::max(area->x, widget.allocation.x + padx);
 531         int const y0 = std::max(area->y, widget.allocation.y + pady);
 532         int const x1 = std::min(area->x + area->width,  widget.allocation.x + padx + static_cast<int>(icon->psize) );
 533         int const y1 = std::min(area->y + area->height, widget.allocation.y + pady + static_cast<int>(icon->psize) );
 534
 535         int width = x1 - x0;
 536         int height = y1 - y0;
 537         // Limit drawing to when we actually have something. Avoids some crashes.
 538         if ( (width > 0) && (height > 0) ) {
 539             gdk_draw_pixbuf(GDK_DRAWABLE(widget.window), NULL, image,
 540                             x0 - widget.allocation.x - padx,
 541                             y0 - widget.allocation.y - pady,
 542                             x0, y0,
 543                             width, height,
 544                             GDK_RGB_DITHER_NORMAL, x0, y0);
 545         }
 546     }
 547 }
 548
 549 GdkPixbuf *sp_icon_image_load_pixmap(gchar const *name, unsigned /*lsize*/, unsigned psize)
 550 {
 551     gchar *path = (gchar *) g_strdup_printf("%s/%s.png", INKSCAPE_PIXMAPDIR, name);
 552     // TODO: bulia, please look over
 553     gsize bytesRead = 0;
 554     gsize bytesWritten = 0;
 555     GError *error = NULL;
 556     gchar *localFilename = g_filename_from_utf8( path,
 557                                                  -1,
 558                                                  &bytesRead,
 559                                                  &bytesWritten,
 560                                                  &error);
 561     GdkPixbuf *pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 562     g_free(localFilename);
 563     g_free(path);
 564     if (!pb) {
 565         path = (gchar *) g_strdup_printf("%s/%s.xpm", INKSCAPE_PIXMAPDIR, name);
 566         // TODO: bulia, please look over
 567         gsize bytesRead = 0;
 568         gsize bytesWritten = 0;
 569         GError *error = NULL;
 570         gchar *localFilename = g_filename_from_utf8( path,
 571                                                      -1,
 572                                                      &bytesRead,
 573                                                      &bytesWritten,
 574                                                      &error);
 575         pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 576         g_free(localFilename);
 577         g_free(path);
 578     }
 579
 580     if (pb) {
 581         if (!gdk_pixbuf_get_has_alpha(pb)) {
 582             gdk_pixbuf_add_alpha(pb, FALSE, 0, 0, 0);
 583         }
 584
 585         if ( ( static_cast<unsigned>(gdk_pixbuf_get_width(pb)) != psize )
 586              || ( static_cast<unsigned>(gdk_pixbuf_get_height(pb)) != psize ) ) {
 587             GdkPixbuf *spb = gdk_pixbuf_scale_simple(pb, psize, psize, GDK_INTERP_HYPER);
 588             g_object_unref(G_OBJECT(pb));
 589             pb = spb;
 590         }
 591     }
 592
 593     return pb;
 594 }
 595
 596 // takes doc, root, icon, and icon name to produce pixels
 597 extern "C" guchar *
 598 sp_icon_doc_icon( SPDocument *doc, NRArenaItem *root,
 599                   gchar const *name, unsigned psize )
 600 {
 601     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 602     bool const dump = prefs->getBool("/debug/icons/dumpSvg");
 603     guchar *px = NULL;
 604
 605     if (doc) {
 606         SPObject *object = doc->getObjectById(name);
 607         if (object && SP_IS_ITEM(object)) {
 608             /* Find bbox in document */
 609             Geom::Matrix const i2doc(sp_item_i2doc_affine(SP_ITEM(object)));
 610             Geom::OptRect dbox = SP_ITEM(object)->getBounds(i2doc);
 611
 612             if ( SP_OBJECT_PARENT(object) == NULL )
 613             {
 614                 dbox = Geom::Rect(Geom::Point(0, 0),
 615                                 Geom::Point(sp_document_width(doc), sp_document_height(doc)));
 616             }
 617
 618             /* This is in document coordinates, i.e. pixels */
 619             if ( dbox ) {
 620                 NRGC gc(NULL);
 621                 /* Update to renderable state */
 622                 double sf = 1.0;
 623                 nr_arena_item_set_transform(root, (Geom::Matrix)Geom::Scale(sf, sf));
 624                 gc.transform.setIdentity();
 625                 nr_arena_item_invoke_update( root, NULL, &gc,
 626                                              NR_ARENA_ITEM_STATE_ALL,
 627                                              NR_ARENA_ITEM_STATE_NONE );
 628                 /* Item integer bbox in points */
 629                 NRRectL ibox;
 630                 ibox.x0 = (int) floor(sf * dbox->min()[Geom::X] + 0.5);
 631                 ibox.y0 = (int) floor(sf * dbox->min()[Geom::Y] + 0.5);
 632                 ibox.x1 = (int) floor(sf * dbox->max()[Geom::X] + 0.5);
 633                 ibox.y1 = (int) floor(sf * dbox->max()[Geom::Y] + 0.5);
 634
 635                 if ( dump ) {
 636                     g_message( "   box    --'%s'  (%f,%f)-(%f,%f)", name, (double)ibox.x0, (double)ibox.y0, (double)ibox.x1, (double)ibox.y1 );
 637                 }
 638
 639                 /* Find button visible area */
 640                 int width = ibox.x1 - ibox.x0;
 641                 int height = ibox.y1 - ibox.y0;
 642
 643                 if ( dump ) {
 644                     g_message( "   vis    --'%s'  (%d,%d)", name, width, height );
 645                 }
 646
 647                 {
 648                     int block = std::max(width, height);
 649                     if (block != static_cast<int>(psize) ) {
 650                         if ( dump ) {
 651                             g_message("      resizing" );
 652                         }
 653                         sf = (double)psize / (double)block;
 654
 655                         nr_arena_item_set_transform(root, (Geom::Matrix)Geom::Scale(sf, sf));
 656                         gc.transform.setIdentity();
 657                         nr_arena_item_invoke_update( root, NULL, &gc,
 658                                                      NR_ARENA_ITEM_STATE_ALL,
 659                                                      NR_ARENA_ITEM_STATE_NONE );
 660                         /* Item integer bbox in points */
 661                         ibox.x0 = (int) floor(sf * dbox->min()[Geom::X] + 0.5);
 662                         ibox.y0 = (int) floor(sf * dbox->min()[Geom::Y] + 0.5);
 663                         ibox.x1 = (int) floor(sf * dbox->max()[Geom::X] + 0.5);
 664                         ibox.y1 = (int) floor(sf * dbox->max()[Geom::Y] + 0.5);
 665
 666                         if ( dump ) {
 667                             g_message( "   box2   --'%s'  (%f,%f)-(%f,%f)", name, (double)ibox.x0, (double)ibox.y0, (double)ibox.x1, (double)ibox.y1 );
 668                         }
 669
 670                         /* Find button visible area */
 671                         width = ibox.x1 - ibox.x0;
 672                         height = ibox.y1 - ibox.y0;
 673                         if ( dump ) {
 674                             g_message( "   vis2   --'%s'  (%d,%d)", name, width, height );
 675                         }
 676                     }
 677                 }
 678
 679                 int dx, dy;
 680                 //dx = (psize - width) / 2;
 681                 //dy = (psize - height) / 2;
 682                 dx=dy=psize;
 683                 dx=(dx-width)/2; // watch out for psize, since 'unsigned'-'signed' can cause problems if the result is negative
 684                 dy=(dy-height)/2;
 685                 NRRectL area;
 686                 area.x0 = ibox.x0 - dx;
 687                 area.y0 = ibox.y0 - dy;
 688                 area.x1 = area.x0 + psize;
 689                 area.y1 = area.y0 + psize;
 690                 /* Actual renderable area */
 691                 NRRectL ua;
 692                 ua.x0 = MAX(ibox.x0, area.x0);
 693                 ua.y0 = MAX(ibox.y0, area.y0);
 694                 ua.x1 = MIN(ibox.x1, area.x1);
 695                 ua.y1 = MIN(ibox.y1, area.y1);
 696
 697                 if ( dump ) {
 698                     g_message( "   area   --'%s'  (%f,%f)-(%f,%f)", name, (double)area.x0, (double)area.y0, (double)area.x1, (double)area.y1 );
 699                     g_message( "   ua     --'%s'  (%f,%f)-(%f,%f)", name, (double)ua.x0, (double)ua.y0, (double)ua.x1, (double)ua.y1 );
 700                 }
 701                 /* Set up pixblock */
 702                 px = g_new(guchar, 4 * psize * psize);
 703                 memset(px, 0x00, 4 * psize * psize);
 704                 /* Render */
 705                 NRPixBlock B;
 706                 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 707                                           ua.x0, ua.y0, ua.x1, ua.y1,
 708                                           px + 4 * psize * (ua.y0 - area.y0) +
 709                                           4 * (ua.x0 - area.x0),
 710                                           4 * psize, FALSE, FALSE );
 711                 nr_arena_item_invoke_render(NULL, root, &ua, &B,
 712                                              NR_ARENA_ITEM_RENDER_NO_CACHE );
 713                 nr_pixblock_release(&B);
 714
 715                 bool useOverlay = prefs->getBool("/debug/icons/overlaySvg");
 716                 if ( useOverlay ) {
 717                     sp_icon_overlay_pixels( px, psize, psize, 4 * psize, 0x00, 0x00, 0xff );
 718                 }
 719             }
 720         }
 721     }
 722
 723     return px;
 724 } // end of sp_icon_doc_icon()
 725
 726
 727
 728 struct svg_doc_cache_t
 729 {
 730     SPDocument *doc;
 731     NRArenaItem *root;
 732 };
 733
 734 static std::map<Glib::ustring, svg_doc_cache_t *> doc_cache;
 735 static std::map<Glib::ustring, GdkPixbuf *> pb_cache;
 736
 737 Glib::ustring icon_cache_key(gchar const *name, unsigned psize)
 738 {
 739     Glib::ustring key=name;
 740     key += ":";
 741     key += psize;
 742     return key;
 743 }
 744
 745 GdkPixbuf *get_cached_pixbuf(Glib::ustring const &key) {
 746     std::map<Glib::ustring, GdkPixbuf *>::iterator found = pb_cache.find(key);
 747     if ( found != pb_cache.end() ) {
 748         return found->second;
 749     }
 750     return NULL;
 751 }
 752
 753 static std::list<gchar*> &icons_svg_paths()
 754 {
 755     static std::list<gchar *> sources;
 756     static bool initialized = false;
 757     if (!initialized) {
 758         // Fall back from user prefs dir into system locations.
 759         gchar *userdir = profile_path("icons");
 760         sources.push_back(g_build_filename(userdir,"icons.svg", NULL));
 761         sources.push_back(g_build_filename(INKSCAPE_PIXMAPDIR, "icons.svg", NULL));
 762         g_free(userdir);
 763         initialized = true;
 764     }
 765     return sources;
 766 }
 767
 768 // this function renders icons from icons.svg and returns the pixels.
 769 static guchar *load_svg_pixels(gchar const *name,
 770                                unsigned /*lsize*/, unsigned psize)
 771 {
 772     SPDocument *doc = NULL;
 773     NRArenaItem *root = NULL;
 774     svg_doc_cache_t *info = NULL;
 775
 776     std::list<gchar *> &sources = icons_svg_paths();
 777
 778     // Try each document in turn until we successfully load the icon from one
 779     guchar *px=NULL;
 780     for (std::list<gchar*>::iterator i = sources.begin(); i != sources.end() && !px; ++i) {
 781         gchar *doc_filename = *i;
 782
 783         // Did we already load this doc?
 784         Glib::ustring key(doc_filename);
 785         info = 0;
 786         {
 787             std::map<Glib::ustring, svg_doc_cache_t *>::iterator i = doc_cache.find(key);
 788             if ( i != doc_cache.end() ) {
 789                 info = i->second;
 790             }
 791         }
 792
 793         /* Try to load from document. */
 794         if (!info &&
 795             Inkscape::IO::file_test( doc_filename, G_FILE_TEST_IS_REGULAR ) &&
 796             (doc = sp_document_new( doc_filename, FALSE )) ) {
 797
 798             //g_message("Loaded icon file %s", doc_filename);
 799             // prep the document
 800             sp_document_ensure_up_to_date(doc);
 801             /* Create new arena */
 802             NRArena *arena = NRArena::create();
 803             /* Create ArenaItem and set transform */
 804             unsigned visionkey = sp_item_display_key_new(1);
 805             /* fixme: Memory manage root if needed (Lauris) */
 806             root = sp_item_invoke_show( SP_ITEM(SP_DOCUMENT_ROOT(doc)),
 807                                         arena, visionkey, SP_ITEM_SHOW_DISPLAY );
 808
 809             // store into the cache
 810             info = new svg_doc_cache_t;
 811             g_assert(info);
 812
 813             info->doc=doc;
 814             info->root=root;
 815             doc_cache[key]=info;
 816         }
 817         if (info) {
 818             doc=info->doc;
 819             root=info->root;
 820         }
 821
 822         // move on to the next document if we couldn't get anything
 823         if (!info && !doc) continue;
 824
 825         px = sp_icon_doc_icon( doc, root, name, psize );
 826         //if (px) g_message("Found icon %s in %s", name, doc_filename);
 827     }
 828
 829     //if (!px) g_message("Not found icon %s", name);
 830     return px;
 831 }
 832
 833 static GdkPixbuf *sp_icon_image_load_svg(gchar const *name, GtkIconSize lsize, unsigned psize)
 834 {
 835     Glib::ustring key = icon_cache_key(name, psize);
 836
 837     // did we already load this icon at this scale/size?
 838     GdkPixbuf* pb = get_cached_pixbuf(key);
 839     if (!pb) {
 840         guchar *px = load_svg_pixels(name, lsize, psize);
 841         if (px) {
 842             pb = gdk_pixbuf_new_from_data(px, GDK_COLORSPACE_RGB, TRUE, 8,
 843                                           psize, psize, psize * 4,
 844                                           (GdkPixbufDestroyNotify)g_free, NULL);
 845             pb_cache[key] = pb;
 846         }
 847     }
 848
 849     if ( pb ) {
 850         // increase refcount since we're handing out ownership
 851         g_object_ref(G_OBJECT(pb));
 852     }
 853     return pb;
 854 }
 855
 856 void sp_icon_overlay_pixels(guchar *px, int width, int height, int stride,
 857                             unsigned r, unsigned g, unsigned b)
 858 {
 859     int bytesPerPixel = 4;
 860     int spacing = 4;
 861     for ( int y = 0; y < height; y += spacing ) {
 862         guchar *ptr = px + y * stride;
 863         for ( int x = 0; x < width; x += spacing ) {
 864             *(ptr++) = r;
 865             *(ptr++) = g;
 866             *(ptr++) = b;
 867             *(ptr++) = 0xff;
 868
 869             ptr += bytesPerPixel * (spacing - 1);
 870         }
 871     }
 872
 873     if ( width > 1 && height > 1 ) {
 874         // point at the last pixel
 875         guchar *ptr = px + ((height-1) * stride) + ((width - 1) * bytesPerPixel);
 876
 877         if ( width > 2 ) {
 878             px[4] = r;
 879             px[5] = g;
 880             px[6] = b;
 881             px[7] = 0xff;
 882
 883             ptr[-12] = r;
 884             ptr[-11] = g;
 885             ptr[-10] = b;
 886             ptr[-9] = 0xff;
 887         }
 888
 889         ptr[-4] = r;
 890         ptr[-3] = g;
 891         ptr[-2] = b;
 892         ptr[-1] = 0xff;
 893
 894         px[0 + stride] = r;
 895         px[1 + stride] = g;
 896         px[2 + stride] = b;
 897         px[3 + stride] = 0xff;
 898
 899         ptr[0 - stride] = r;
 900         ptr[1 - stride] = g;
 901         ptr[2 - stride] = b;
 902         ptr[3 - stride] = 0xff;
 903
 904         if ( height > 2 ) {
 905             ptr[0 - stride * 3] = r;
 906             ptr[1 - stride * 3] = g;
 907             ptr[2 - stride * 3] = b;
 908             ptr[3 - stride * 3] = 0xff;
 909         }
 910     }
 911 }
 912
 913
 914 /*
 915   Local Variables:
 916   mode:c++
 917   c-file-style:"stroustrup"
 918   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 919   indent-tabs-mode:nil
 920   fill-column:99
 921   End:
 922 */
 923 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :