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