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( Inkscape::IconSize 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 void injectCustomSize();
  69
  70 static GtkWidgetClass *parent_class;
  71
  72 static bool sizeDirty = true;
  73
  74 static bool sizeMapDone = false;
  75 static GtkIconSize iconSizeLookup[] = {
  76     GTK_ICON_SIZE_INVALID,
  77     GTK_ICON_SIZE_MENU,
  78     GTK_ICON_SIZE_SMALL_TOOLBAR,
  79     GTK_ICON_SIZE_LARGE_TOOLBAR,
  80     GTK_ICON_SIZE_BUTTON,
  81     GTK_ICON_SIZE_DND,
  82     GTK_ICON_SIZE_DIALOG,
  83     GTK_ICON_SIZE_MENU, // for Inkscape::ICON_SIZE_DECORATION
  84 };
  85
  86 GtkType
  87 sp_icon_get_type()
  88 {
  89     static GtkType type = 0;
  90     if (!type) {
  91         GtkTypeInfo info = {
  92             "SPIcon",
  93             sizeof(SPIcon),
  94             sizeof(SPIconClass),
  95             (GtkClassInitFunc) sp_icon_class_init,
  96             (GtkObjectInitFunc) sp_icon_init,
  97             NULL, NULL, NULL
  98         };
  99         type = gtk_type_unique(GTK_TYPE_WIDGET, &info);
 100     }
 101     return type;
 102 }
 103
 104 static void
 105 sp_icon_class_init(SPIconClass *klass)
 106 {
 107     GtkObjectClass *object_class;
 108     GtkWidgetClass *widget_class;
 109
 110     object_class = (GtkObjectClass *) klass;
 111     widget_class = (GtkWidgetClass *) klass;
 112
 113     parent_class = (GtkWidgetClass*)g_type_class_peek_parent(klass);
 114
 115     object_class->destroy = sp_icon_destroy;
 116
 117     widget_class->size_request = sp_icon_size_request;
 118     widget_class->size_allocate = sp_icon_size_allocate;
 119     widget_class->expose_event = sp_icon_expose;
 120     widget_class->screen_changed = sp_icon_screen_changed;
 121     widget_class->style_set = sp_icon_style_set;
 122 }
 123
 124
 125 static void
 126 sp_icon_init(SPIcon *icon)
 127 {
 128     GTK_WIDGET_FLAGS(icon) |= GTK_NO_WINDOW;
 129     icon->lsize = Inkscape::ICON_SIZE_BUTTON;
 130     icon->psize = 0;
 131     icon->name = 0;
 132     icon->pb = 0;
 133     icon->pb_faded = 0;
 134 }
 135
 136 static void
 137 sp_icon_destroy(GtkObject *object)
 138 {
 139     SPIcon *icon = SP_ICON(object);
 140     sp_icon_clear(icon);
 141     if ( icon->name ) {
 142         g_free( icon->name );
 143         icon->name = 0;
 144     }
 145
 146     ((GtkObjectClass *) (parent_class))->destroy(object);
 147 }
 148
 149 static void sp_icon_reset( SPIcon *icon ) {
 150     icon->psize = 0;
 151     sp_icon_clear(icon);
 152 }
 153
 154 static void sp_icon_clear( SPIcon *icon ) {
 155     if (icon->pb) {
 156         g_object_unref(G_OBJECT(icon->pb));
 157         icon->pb = NULL;
 158     }
 159     if (icon->pb_faded) {
 160         g_object_unref(G_OBJECT(icon->pb_faded));
 161         icon->pb_faded = NULL;
 162     }
 163 }
 164
 165 static void
 166 sp_icon_size_request(GtkWidget *widget, GtkRequisition *requisition)
 167 {
 168     SPIcon const *icon = SP_ICON(widget);
 169
 170     int const size = ( icon->psize
 171                        ? icon->psize
 172                        : sp_icon_get_phys_size(icon->lsize) );
 173     requisition->width = size;
 174     requisition->height = size;
 175 }
 176
 177 static void
 178 sp_icon_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
 179 {
 180     widget->allocation = *allocation;
 181
 182     if (GTK_WIDGET_DRAWABLE(widget)) {
 183         gtk_widget_queue_draw(widget);
 184     }
 185 }
 186
 187 static int sp_icon_expose(GtkWidget *widget, GdkEventExpose *event)
 188 {
 189     if ( GTK_WIDGET_DRAWABLE(widget) ) {
 190         SPIcon *icon = SP_ICON(widget);
 191         if ( !icon->pb ) {
 192             sp_icon_fetch_pixbuf( icon );
 193         }
 194
 195         sp_icon_paint(SP_ICON(widget), &event->area);
 196     }
 197
 198     return TRUE;
 199 }
 200
 201 void sp_icon_fetch_pixbuf( SPIcon *icon )
 202 {
 203     if ( icon ) {
 204         if ( !icon->pb ) {
 205             guchar *pixels = 0;
 206
 207             icon->psize = sp_icon_get_phys_size(icon->lsize);
 208
 209             pixels = sp_icon_image_load( icon, icon->name );
 210
 211             if (pixels) {
 212                 // don't pass the nr_free because we're caching the pixel
 213                 // space loaded through ...
 214                 // I just changed this. make sure sp_icon_image_load still does the right thing.
 215                 icon->pb = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 216                                                     icon->psize, icon->psize, icon->psize * 4,
 217                                                     /*(GdkPixbufDestroyNotify)nr_free*/NULL, NULL);
 218                 icon->pb_faded = gdk_pixbuf_copy(icon->pb);
 219
 220                 pixels = gdk_pixbuf_get_pixels(icon->pb_faded);
 221                 size_t stride = gdk_pixbuf_get_rowstride(icon->pb_faded);
 222                 pixels += 3; // alpha
 223                 for ( int row = 0 ; row < icon->psize ; row++ ) {
 224                     guchar *row_pixels = pixels;
 225                     for ( int column = 0 ; column < icon->psize ; column++ ) {
 226                         *row_pixels = *row_pixels >> 1;
 227                         row_pixels += 4;
 228                     }
 229                     pixels += stride;
 230                 }
 231             } else {
 232                 /* TODO: We should do something more useful if we can't load the image. */
 233                 g_warning ("failed to load icon '%s'", icon->name);
 234             }
 235         }
 236     }
 237 }
 238
 239 static void sp_icon_screen_changed( GtkWidget *widget, GdkScreen *previous_screen )
 240 {
 241     if ( GTK_WIDGET_CLASS( parent_class )->screen_changed ) {
 242         GTK_WIDGET_CLASS( parent_class )->screen_changed( widget, previous_screen );
 243     }
 244     SPIcon *icon = SP_ICON(widget);
 245     sp_icon_theme_changed(icon);
 246 }
 247
 248 static void sp_icon_style_set( GtkWidget *widget, GtkStyle *previous_style )
 249 {
 250     if ( GTK_WIDGET_CLASS( parent_class )->style_set ) {
 251         GTK_WIDGET_CLASS( parent_class )->style_set( widget, previous_style );
 252     }
 253     SPIcon *icon = SP_ICON(widget);
 254     sp_icon_theme_changed(icon);
 255 }
 256
 257 static void sp_icon_theme_changed( SPIcon *icon )
 258 {
 259     //g_message("Got a change bump for this icon");
 260     sizeDirty = true;
 261     sp_icon_reset(icon);
 262     gtk_widget_queue_draw( GTK_WIDGET(icon) );
 263 }
 264
 265
 266 static GtkWidget *
 267 sp_icon_new_full( Inkscape::IconSize lsize, gchar const *name )
 268 {
 269     static gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpGtk", 0, 0, 1 );
 270     static gint fallback = prefs_get_int_attribute_limited( "debug.icons", "checkNames", 0, 0, 1 );
 271
 272     addPreRender( lsize, name );
 273
 274     GtkStockItem stock;
 275     gboolean tryLoad = gtk_stock_lookup( name, &stock );
 276     if ( !tryLoad && fallback ) {
 277         tryLoad |= strncmp("gtk-", name, 4 ) == 0;
 278     }
 279     if ( !tryLoad && fallback ) {
 280         tryLoad |= strncmp("gnome-", name, 6 ) == 0;
 281     }
 282
 283     GtkWidget *widget = 0;
 284     if ( tryLoad ) {
 285         gint trySize = CLAMP( static_cast<gint>(lsize), 0, static_cast<gint>(G_N_ELEMENTS(iconSizeLookup) - 1) );
 286
 287         if ( !sizeMapDone ) {
 288             injectCustomSize();
 289         }
 290
 291         GtkWidget *img = gtk_image_new_from_stock( name, iconSizeLookup[trySize] );
 292         if ( img ) {
 293             GtkImageType type = gtk_image_get_storage_type( GTK_IMAGE(img) );
 294             if ( type == GTK_IMAGE_STOCK ) {
 295                 widget = GTK_WIDGET(img);
 296                 img = 0;
 297
 298                 if ( dump ) {
 299                     g_message( "loaded gtk  '%s' %d  (GTK_IMAGE_STOCK)", name, lsize );
 300                 }
 301             } else {
 302                 if ( dump ) {
 303                     g_message( "skipped gtk '%s' %d  (not GTK_IMAGE_STOCK)", name, lsize );
 304                 }
 305                 g_object_unref( (GObject *)img );
 306                 img = 0;
 307             }
 308         }
 309     }
 310
 311     if ( !widget ) {
 312         SPIcon *icon = (SPIcon *)g_object_new(SP_TYPE_ICON, NULL);
 313         icon->lsize = lsize;
 314         icon->name = g_strdup(name);
 315         icon->psize = sp_icon_get_phys_size(lsize);
 316
 317         widget = GTK_WIDGET(icon);
 318     }
 319
 320     return widget;
 321 }
 322
 323 GtkWidget *
 324 sp_icon_new( Inkscape::IconSize lsize, gchar const *name )
 325 {
 326     return sp_icon_new_full( lsize, name );
 327 }
 328
 329 Gtk::Widget *sp_icon_get_icon( Glib::ustring const &oid, Inkscape::IconSize size )
 330 {
 331     Gtk::Widget *result = 0;
 332     GtkWidget *widget = sp_icon_new_full( size, oid.c_str() );
 333
 334     if ( widget ) {
 335         if ( GTK_IS_IMAGE(widget) ) {
 336             GtkImage *img = GTK_IMAGE(widget);
 337             result = Glib::wrap( img );
 338         } else {
 339             result = Glib::wrap( widget );
 340         }
 341     }
 342
 343     return result;
 344 }
 345
 346 // Try to load the named svg, falling back to pixmaps
 347 guchar *
 348 sp_icon_image_load( SPIcon *icon, gchar const *name )
 349 {
 350     guchar *px = sp_icon_image_load_svg( name, icon->lsize, icon->psize );
 351     if (!px) {
 352         px = sp_icon_image_load_pixmap(name, icon->lsize, icon->psize);
 353     }
 354
 355     return px;
 356 }
 357
 358 GtkIconSize
 359 sp_icon_get_gtk_size(int size)
 360 {
 361     static GtkIconSize map[64] = {(GtkIconSize)0};
 362     size = CLAMP(size, 4, 63);
 363     if (!map[size]) {
 364         static int count = 0;
 365         char c[64];
 366         g_snprintf(c, 64, "InkscapeIcon%d", count++);
 367         map[size] = gtk_icon_size_register(c, size, size);
 368     }
 369     return map[size];
 370 }
 371
 372 static void injectCustomSize()
 373 {
 374     // TODO - still need to handle the case of theme changes and resize, especially as we can't re-register a string.
 375     if ( !sizeMapDone )
 376     {
 377         gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpDefault", 0, 0, 1 );
 378         gint width = 0;
 379         gint height = 0;
 380         if ( gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &width, &height ) ) {
 381             gint newWidth = ((width * 3) / 4);
 382             gint newHeight = ((height * 3) / 4);
 383             GtkIconSize newSizeEnum = gtk_icon_size_register( "inkscape-decoration", newWidth, newHeight );
 384             if ( newSizeEnum ) {
 385                 if ( dump ) {
 386                     g_message("Registered (%d, %d) <= (%d, %d) as index %d", newWidth, newHeight, width, height, newSizeEnum);
 387                 }
 388                 guint index = static_cast<guint>(Inkscape::ICON_SIZE_DECORATION);
 389                 if ( index < G_N_ELEMENTS(iconSizeLookup) ) {
 390                     iconSizeLookup[index] = newSizeEnum;
 391                 } else if ( dump ) {
 392                     g_message("size lookup array too small to store entry");
 393                 }
 394             }
 395         }
 396         sizeMapDone = true;
 397     }
 398
 399 }
 400
 401 static int sp_icon_get_phys_size(int size)
 402 {
 403     static bool init = false;
 404     static int lastSys[Inkscape::ICON_SIZE_DECORATION + 1];
 405     static int vals[Inkscape::ICON_SIZE_DECORATION + 1];
 406
 407     size = CLAMP( size, GTK_ICON_SIZE_MENU, Inkscape::ICON_SIZE_DECORATION );
 408
 409     if ( !sizeMapDone ) {
 410         injectCustomSize();
 411     }
 412
 413     if ( sizeDirty && init ) {
 414         GtkIconSize const gtkSizes[] = {
 415             GTK_ICON_SIZE_MENU,
 416             GTK_ICON_SIZE_SMALL_TOOLBAR,
 417             GTK_ICON_SIZE_LARGE_TOOLBAR,
 418             GTK_ICON_SIZE_BUTTON,
 419             GTK_ICON_SIZE_DND,
 420             GTK_ICON_SIZE_DIALOG,
 421             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 422                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 423                 GTK_ICON_SIZE_MENU
 424         };
 425         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes) && init; ++i) {
 426             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 427
 428             g_assert( val_ix < G_N_ELEMENTS(vals) );
 429
 430             gint width = 0;
 431             gint height = 0;
 432             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 433                 init &= (lastSys[val_ix] == std::max(width, height));
 434             }
 435         }
 436     }
 437
 438     if ( !init ) {
 439         sizeDirty = false;
 440         gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpDefault", 0, 0, 1 );
 441
 442         if ( dump ) {
 443             g_message( "Default icon sizes:" );
 444         }
 445         memset( vals, 0, sizeof(vals) );
 446         memset( lastSys, 0, sizeof(lastSys) );
 447         GtkIconSize const gtkSizes[] = {
 448             GTK_ICON_SIZE_MENU,
 449             GTK_ICON_SIZE_SMALL_TOOLBAR,
 450             GTK_ICON_SIZE_LARGE_TOOLBAR,
 451             GTK_ICON_SIZE_BUTTON,
 452             GTK_ICON_SIZE_DND,
 453             GTK_ICON_SIZE_DIALOG,
 454             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 455                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 456                 GTK_ICON_SIZE_MENU
 457         };
 458         gchar const *const names[] = {
 459             "GTK_ICON_SIZE_MENU",
 460             "GTK_ICON_SIZE_SMALL_TOOLBAR",
 461             "GTK_ICON_SIZE_LARGE_TOOLBAR",
 462             "GTK_ICON_SIZE_BUTTON",
 463             "GTK_ICON_SIZE_DND",
 464             "GTK_ICON_SIZE_DIALOG",
 465             "inkscape-decoration"
 466         };
 467
 468         GtkWidget *icon = (GtkWidget *)g_object_new(SP_TYPE_ICON, NULL);
 469
 470         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes); ++i) {
 471             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 472
 473             g_assert( val_ix < G_N_ELEMENTS(vals) );
 474
 475             gint width = 0;
 476             gint height = 0;
 477             bool used = false;
 478             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 479                 vals[val_ix] = std::max(width, height);
 480                 lastSys[val_ix] = vals[val_ix];
 481                 used = true;
 482             }
 483             if (dump) {
 484                 g_message(" =--  %u  size:%d  %c(%d, %d)   '%s'",
 485                           i, gtkSizes[i],
 486                           ( used ? ' ' : 'X' ), width, height, names[i]);
 487             }
 488             gchar const *id = GTK_STOCK_OPEN;
 489             GdkPixbuf *pb = gtk_widget_render_icon( icon, id, gtkSizes[i], NULL);
 490             if (pb) {
 491                 width = gdk_pixbuf_get_width(pb);
 492                 height = gdk_pixbuf_get_height(pb);
 493                 int newSize = std::max( width, height );
 494                 // TODO perhaps check a few more stock icons to get a range on sizes.
 495                 if ( newSize > 0 ) {
 496                     vals[val_ix] = newSize;
 497                 }
 498                 if (dump) {
 499                     g_message("      %u  size:%d   (%d, %d)", i, gtkSizes[i], width, height);
 500                 }
 501
 502                 g_object_unref(G_OBJECT(pb));
 503             }
 504         }
 505         //g_object_unref(icon);
 506         init = true;
 507     }
 508
 509     return vals[size];
 510 }
 511
 512 static void sp_icon_paint(SPIcon *icon, GdkRectangle const *area)
 513 {
 514     GtkWidget &widget = *GTK_WIDGET(icon);
 515
 516     GdkPixbuf *image = GTK_WIDGET_IS_SENSITIVE(&widget) ? icon->pb : icon->pb_faded;
 517
 518     if (image) {
 519         int const padx = ( ( widget.allocation.width > icon->psize )
 520                            ? ( widget.allocation.width - icon->psize ) / 2
 521                            : 0 );
 522         int const pady = ( ( widget.allocation.height > icon->psize )
 523                            ? ( widget.allocation.height - icon->psize ) / 2
 524                            : 0 );
 525
 526         int const x0 = std::max(area->x, widget.allocation.x + padx);
 527         int const y0 = std::max(area->y, widget.allocation.y + pady);
 528         int const x1 = std::min(area->x + area->width,  widget.allocation.x + padx + static_cast<int>(icon->psize) );
 529         int const y1 = std::min(area->y + area->height, widget.allocation.y + pady + static_cast<int>(icon->psize) );
 530
 531         gdk_draw_pixbuf(GDK_DRAWABLE(widget.window), NULL, image,
 532                         x0 - widget.allocation.x - padx,
 533                         y0 - widget.allocation.y - pady,
 534                         x0, y0,
 535                         x1 - x0, y1 - y0,
 536                         GDK_RGB_DITHER_NORMAL, x0, y0);
 537     }
 538 }
 539
 540 static guchar *
 541 sp_icon_image_load_pixmap(gchar const *name, unsigned lsize, unsigned psize)
 542 {
 543     gchar *path;
 544     guchar *px;
 545     GdkPixbuf *pb;
 546
 547     path = (gchar *) g_strdup_printf("%s/%s.png", INKSCAPE_PIXMAPDIR, name);
 548     // TODO: bulia, please look over
 549     gsize bytesRead = 0;
 550     gsize bytesWritten = 0;
 551     GError *error = NULL;
 552     gchar *localFilename = g_filename_from_utf8( path,
 553                                                  -1,
 554                                                  &bytesRead,
 555                                                  &bytesWritten,
 556                                                  &error);
 557     pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 558     g_free(localFilename);
 559     g_free(path);
 560     if (!pb) {
 561         path = (gchar *) g_strdup_printf("%s/%s.xpm", INKSCAPE_PIXMAPDIR, name);
 562         // TODO: bulia, please look over
 563         gsize bytesRead = 0;
 564         gsize bytesWritten = 0;
 565         GError *error = NULL;
 566         gchar *localFilename = g_filename_from_utf8( path,
 567                                                      -1,
 568                                                      &bytesRead,
 569                                                      &bytesWritten,
 570                                                      &error);
 571         pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 572         g_free(localFilename);
 573         g_free(path);
 574     }
 575     if (pb) {
 576         if (!gdk_pixbuf_get_has_alpha(pb))
 577             gdk_pixbuf_add_alpha(pb, FALSE, 0, 0, 0);
 578         if ( ( static_cast<unsigned>(gdk_pixbuf_get_width(pb)) != psize )
 579              || ( static_cast<unsigned>(gdk_pixbuf_get_height(pb)) != psize ) ) {
 580             GdkPixbuf *spb = gdk_pixbuf_scale_simple(pb, psize, psize, GDK_INTERP_HYPER);
 581             g_object_unref(G_OBJECT(pb));
 582             pb = spb;
 583         }
 584         guchar *spx = gdk_pixbuf_get_pixels(pb);
 585         int srs = gdk_pixbuf_get_rowstride(pb);
 586         px = nr_new(guchar, 4 * psize * psize);
 587         for (unsigned y = 0; y < psize; y++) {
 588             memcpy(px + 4 * y * psize, spx + y * srs, 4 * psize);
 589         }
 590         g_object_unref(G_OBJECT(pb));
 591
 592         return px;
 593     }
 594
 595     return NULL;
 596 }
 597
 598 // takes doc, root, icon, and icon name to produce pixels
 599 extern "C" guchar *
 600 sp_icon_doc_icon( SPDocument *doc, NRArenaItem *root,
 601                   gchar const *name, unsigned psize )
 602 {
 603     gint const dump = prefs_get_int_attribute_limited( "debug.icons", "dumpSvg", 0, 0, 1 );
 604     guchar *px = NULL;
 605
 606     if (doc) {
 607         SPObject *object = doc->getObjectById(name);
 608         if (object && SP_IS_ITEM(object)) {
 609             /* Find bbox in document */
 610             NR::Matrix const i2doc(sp_item_i2doc_affine(SP_ITEM(object)));
 611             NR::Rect dbox = SP_ITEM(object)->invokeBbox(i2doc);
 612
 613             if ( SP_OBJECT_PARENT(object) == NULL )
 614             {
 615                 dbox = NR::Rect(NR::Point(0, 0),
 616                                 NR::Point(sp_document_width(doc), sp_document_height(doc)));
 617             }
 618
 619             /* This is in document coordinates, i.e. pixels */
 620             if (dbox.isEmpty() == false) {
 621                 NRGC gc(NULL);
 622                 /* Update to renderable state */
 623                 double sf = 1.0;
 624                 NRMatrix t;
 625                 nr_matrix_set_scale(&t, sf, sf);
 626                 nr_arena_item_set_transform(root, &t);
 627                 nr_matrix_set_identity(&gc.transform);
 628                 nr_arena_item_invoke_update( root, NULL, &gc,
 629                                              NR_ARENA_ITEM_STATE_ALL,
 630                                              NR_ARENA_ITEM_STATE_NONE );
 631                 /* Item integer bbox in points */
 632                 NRRectL ibox;
 633                 ibox.x0 = (int) floor(sf * dbox.min()[NR::X] + 0.5);
 634                 ibox.y0 = (int) floor(sf * dbox.min()[NR::Y] + 0.5);
 635                 ibox.x1 = (int) floor(sf * dbox.max()[NR::X] + 0.5);
 636                 ibox.y1 = (int) floor(sf * dbox.max()[NR::Y] + 0.5);
 637
 638                 if ( dump ) {
 639                     g_message( "   box    --'%s'  (%f,%f)-(%f,%f)", name, (double)ibox.x0, (double)ibox.y0, (double)ibox.x1, (double)ibox.y1 );
 640                 }
 641
 642                 /* Find button visible area */
 643                 int width = ibox.x1 - ibox.x0;
 644                 int height = ibox.y1 - ibox.y0;
 645
 646                 if ( dump ) {
 647                     g_message( "   vis    --'%s'  (%d,%d)", name, width, height );
 648                 }
 649
 650                 {
 651                     int block = std::max(width, height);
 652                     if (block != static_cast<int>(psize) ) {
 653                         if ( dump ) {
 654                             g_message("      resizing" );
 655                         }
 656                         sf = (double)psize / (double)block;
 657
 658                         nr_matrix_set_scale(&t, sf, sf);
 659                         nr_arena_item_set_transform(root, &t);
 660                         nr_matrix_set_identity(&gc.transform);
 661                         nr_arena_item_invoke_update( root, NULL, &gc,
 662                                                      NR_ARENA_ITEM_STATE_ALL,
 663                                                      NR_ARENA_ITEM_STATE_NONE );
 664                         /* Item integer bbox in points */
 665                         ibox.x0 = (int) floor(sf * dbox.min()[NR::X] + 0.5);
 666                         ibox.y0 = (int) floor(sf * dbox.min()[NR::Y] + 0.5);
 667                         ibox.x1 = (int) floor(sf * dbox.max()[NR::X] + 0.5);
 668                         ibox.y1 = (int) floor(sf * dbox.max()[NR::Y] + 0.5);
 669
 670                         if ( dump ) {
 671                             g_message( "   box2   --'%s'  (%f,%f)-(%f,%f)", name, (double)ibox.x0, (double)ibox.y0, (double)ibox.x1, (double)ibox.y1 );
 672                         }
 673
 674                         /* Find button visible area */
 675                         width = ibox.x1 - ibox.x0;
 676                         height = ibox.y1 - ibox.y0;
 677                         if ( dump ) {
 678                             g_message( "   vis2   --'%s'  (%d,%d)", name, width, height );
 679                         }
 680                     }
 681                 }
 682
 683                 int dx, dy;
 684                 //dx = (psize - width) / 2;
 685                 //dy = (psize - height) / 2;
 686                 dx=dy=psize;
 687                 dx=(dx-width)/2; // watch out for psize, since 'unsigned'-'signed' can cause problems if the result is negative
 688                 dy=(dy-height)/2;
 689                 NRRectL area;
 690                 area.x0 = ibox.x0 - dx;
 691                 area.y0 = ibox.y0 - dy;
 692                 area.x1 = area.x0 + psize;
 693                 area.y1 = area.y0 + psize;
 694                 /* Actual renderable area */
 695                 NRRectL ua;
 696                 ua.x0 = MAX(ibox.x0, area.x0);
 697                 ua.y0 = MAX(ibox.y0, area.y0);
 698                 ua.x1 = MIN(ibox.x1, area.x1);
 699                 ua.y1 = MIN(ibox.y1, area.y1);
 700
 701                 if ( dump ) {
 702                     g_message( "   area   --'%s'  (%f,%f)-(%f,%f)", name, (double)area.x0, (double)area.y0, (double)area.x1, (double)area.y1 );
 703                     g_message( "   ua     --'%s'  (%f,%f)-(%f,%f)", name, (double)ua.x0, (double)ua.y0, (double)ua.x1, (double)ua.y1 );
 704                 }
 705                 /* Set up pixblock */
 706                 px = nr_new(guchar, 4 * psize * psize);
 707                 memset(px, 0x00, 4 * psize * psize);
 708                 /* Render */
 709                 NRPixBlock B;
 710                 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 711                                           ua.x0, ua.y0, ua.x1, ua.y1,
 712                                           px + 4 * psize * (ua.y0 - area.y0) +
 713                                           4 * (ua.x0 - area.x0),
 714                                           4 * psize, FALSE, FALSE );
 715                 nr_arena_item_invoke_render( root, &ua, &B,
 716                                              NR_ARENA_ITEM_RENDER_NO_CACHE );
 717                 nr_pixblock_release(&B);
 718
 719                 gint useOverlay = prefs_get_int_attribute_limited( "debug.icons", "overlaySvg", 0, 0, 1 );
 720                 if ( useOverlay ) {
 721                     sp_icon_overlay_pixels( px, psize, psize, 4 * psize, 0x00, 0x00, 0xff );
 722                 }
 723             }
 724         }
 725     }
 726
 727     return px;
 728 } // end of sp_icon_doc_icon()
 729
 730
 731
 732 struct svg_doc_cache_t
 733 {
 734     SPDocument *doc;
 735     NRArenaItem *root;
 736 };
 737
 738 static std::map<Glib::ustring, svg_doc_cache_t *> doc_cache;
 739 static std::map<Glib::ustring, guchar *> px_cache;
 740
 741 static Glib::ustring icon_cache_key(gchar const *name,
 742                                     unsigned lsize, unsigned psize)
 743 {
 744     Glib::ustring key=name;
 745     key += ":";
 746     key += lsize;
 747     key += ":";
 748     key += psize;
 749     return key;
 750 }
 751
 752 static guchar *get_cached_pixels(Glib::ustring const &key) {
 753     std::map<Glib::ustring, guchar *>::iterator found=px_cache.find(key);
 754     if ( found != px_cache.end() ) {
 755         return found->second;
 756     }
 757     return NULL;
 758 }
 759
 760 static guchar *load_svg_pixels(gchar const *name,
 761                                unsigned lsize, unsigned psize)
 762 {
 763     SPDocument *doc = NULL;
 764     NRArenaItem *root = NULL;
 765     svg_doc_cache_t *info = NULL;
 766
 767     // Fall back from user prefs dir into system locations.
 768     Glib::ustring iconsvg = name;
 769     iconsvg += ".svg";
 770     std::list<gchar *> sources;
 771     sources.push_back(g_build_filename(profile_path("icons"),iconsvg.c_str(), NULL));
 772     sources.push_back(g_build_filename(profile_path("icons"),"icons.svg", NULL));
 773     sources.push_back(g_build_filename(INKSCAPE_PIXMAPDIR, iconsvg.c_str(), NULL));
 774     sources.push_back(g_build_filename(INKSCAPE_PIXMAPDIR, "icons.svg", NULL));
 775
 776     // Try each document in turn until we successfully load the icon from one
 777     guchar *px=NULL;
 778     while ( !sources.empty() && !px ) {
 779         gchar *doc_filename = sources.front();
 780
 781         // Did we already load this doc?
 782         Glib::ustring key(doc_filename);
 783         info = 0;
 784         {
 785             std::map<Glib::ustring, svg_doc_cache_t *>::iterator i = doc_cache.find(key);
 786             if ( i != doc_cache.end() ) {
 787                 info = i->second;
 788             }
 789         }
 790
 791         /* Try to load from document. */
 792         if (!info &&
 793             Inkscape::IO::file_test( doc_filename, G_FILE_TEST_IS_REGULAR ) &&
 794             (doc = sp_document_new( doc_filename, FALSE )) ) {
 795
 796             // prep the document
 797             sp_document_ensure_up_to_date(doc);
 798             /* Create new arena */
 799             NRArena *arena = NRArena::create();
 800             /* Create ArenaItem and set transform */
 801             unsigned visionkey = sp_item_display_key_new(1);
 802             /* fixme: Memory manage root if needed (Lauris) */
 803             root = sp_item_invoke_show( SP_ITEM(SP_DOCUMENT_ROOT(doc)),
 804                                         arena, visionkey, SP_ITEM_SHOW_DISPLAY );
 805
 806             // store into the cache
 807             info = new svg_doc_cache_t;
 808             g_assert(info);
 809
 810             info->doc=doc;
 811             info->root=root;
 812             doc_cache[key]=info;
 813         }
 814         if (info) {
 815             doc=info->doc;
 816             root=info->root;
 817         }
 818
 819         // toss the filename
 820         g_free(doc_filename);
 821         sources.pop_front();
 822
 823         // move on to the next document if we couldn't get anything
 824         if (!info && !doc) continue;
 825
 826         px = sp_icon_doc_icon( doc, root, name, psize );
 827     }
 828
 829     return px;
 830 }
 831
 832 // returns true if icon needed preloading, false if nothing was done
 833 static bool prerender_icon(gchar const *name, unsigned lsize, unsigned psize)
 834 {
 835     Glib::ustring key=icon_cache_key(name, lsize, psize);
 836     guchar *px=get_cached_pixels(key);
 837     if (px) {
 838         return false;
 839     } else {
 840         px = load_svg_pixels(name, lsize, psize);
 841         if (px) {
 842             px_cache[key] = px;
 843         }
 844         return true;
 845     }
 846 }
 847
 848 static guchar *
 849 sp_icon_image_load_svg(gchar const *name, unsigned lsize, unsigned psize)
 850 {
 851     Glib::ustring key=icon_cache_key(name, lsize, psize);
 852
 853     // did we already load this icon at this scale/size?
 854     guchar *px=get_cached_pixels(key);
 855     if (!px) {
 856         px = load_svg_pixels(name, lsize, psize);
 857         if (px) {
 858             px_cache[key] = px;
 859         }
 860     }
 861     return px;
 862 }
 863
 864 void sp_icon_overlay_pixels(guchar *px, int width, int height, int stride,
 865                             unsigned r, unsigned g, unsigned b)
 866 {
 867     for ( int y = 0; y < height; y += 4 ) {
 868         guchar *ptr = px + y * stride;
 869         for ( int x = 0; x < width; x += 4 ) {
 870             *(ptr++) = r;
 871             *(ptr++) = g;
 872             *(ptr++) = b;
 873             *(ptr++) = 0xff;
 874
 875             ptr += 4 * 3;
 876         }
 877     }
 878
 879     if ( width > 1 && height > 1 ) {
 880         // point at the last pixel
 881         guchar *ptr = px + ((height-1) * stride) + ((width - 1) * 4);
 882
 883         if ( width > 2 ) {
 884             px[4] = r;
 885             px[5] = g;
 886             px[6] = b;
 887             px[7] = 0xff;
 888
 889             ptr[-12] = r;
 890             ptr[-11] = g;
 891             ptr[-10] = b;
 892             ptr[-9] = 0xff;
 893         }
 894
 895         ptr[-4] = r;
 896         ptr[-3] = g;
 897         ptr[-2] = b;
 898         ptr[-1] = 0xff;
 899
 900         px[0 + stride] = r;
 901         px[1 + stride] = g;
 902         px[2 + stride] = b;
 903         px[3 + stride] = 0xff;
 904
 905         ptr[0 - stride] = r;
 906         ptr[1 - stride] = g;
 907         ptr[2 - stride] = b;
 908         ptr[3 - stride] = 0xff;
 909
 910         if ( height > 2 ) {
 911             ptr[0 - stride * 3] = r;
 912             ptr[1 - stride * 3] = g;
 913             ptr[2 - stride * 3] = b;
 914             ptr[3 - stride * 3] = 0xff;
 915         }
 916     }
 917 }
 918
 919 class preRenderItem
 920 {
 921 public:
 922     preRenderItem( Inkscape::IconSize lsize, gchar const *name ) :
 923         _lsize( lsize ),
 924         _name( name )
 925     {}
 926     Inkscape::IconSize _lsize;
 927     Glib::ustring _name;
 928 };
 929
 930
 931 #include <queue>
 932
 933 static std::queue<preRenderItem> pendingRenders;
 934 static bool callbackHooked = false;
 935
 936 static void addPreRender( Inkscape::IconSize lsize, gchar const *name )
 937 {
 938
 939     if ( !callbackHooked )
 940     {
 941         callbackHooked = true;
 942         g_idle_add_full( G_PRIORITY_LOW, &icon_prerender_task, NULL, NULL );
 943     }
 944
 945     pendingRenders.push(preRenderItem(lsize, name));
 946 }
 947
 948 gboolean icon_prerender_task(gpointer data) {
 949     if (!pendingRenders.empty()) {
 950         preRenderItem single=pendingRenders.front();
 951         pendingRenders.pop();
 952         int psize = sp_icon_get_phys_size(single._lsize);
 953         prerender_icon(single._name.c_str(), single._lsize, psize);
 954     }
 955
 956     if (!pendingRenders.empty()) {
 957         return TRUE;
 958     } else {
 959         callbackHooked = false;
 960         return FALSE;
 961     }
 962 }
 963
 964 /*
 965   Local Variables:
 966   mode:c++
 967   c-file-style:"stroustrup"
 968   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 969   indent-tabs-mode:nil
 970   fill-column:99
 971   End:
 972 */
 973 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :