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/gtkiconfactory.h>
  21 #include <gtk/gtkstock.h>
  22 #include <gtk/gtkimage.h>
  23 #include <gtkmm/image.h>
  24
  25 #include "path-prefix.h"
  26 #include "prefs-utils.h"
  27 #include "inkscape.h"
  28 #include "document.h"
  29 #include "sp-item.h"
  30 #include "display/nr-arena.h"
  31 #include "display/nr-arena-item.h"
  32 #include "io/sys.h"
  33
  34 #include "icon.h"
  35
  36 static gboolean icon_prerender_task(gpointer data);
  37
  38 static void addPreRender( Inkscape::IconSize lsize, gchar const *name );
  39
  40 static void sp_icon_class_init(SPIconClass *klass);
  41 static void sp_icon_init(SPIcon *icon);
  42 static void sp_icon_destroy(GtkObject *object);
  43
  44 static void sp_icon_reset(SPIcon *icon);
  45 static void sp_icon_clear(SPIcon *icon);
  46
  47 static void sp_icon_size_request(GtkWidget *widget, GtkRequisition *requisition);
  48 static void sp_icon_size_allocate(GtkWidget *widget, GtkAllocation *allocation);
  49 static int sp_icon_expose(GtkWidget *widget, GdkEventExpose *event);
  50
  51 static void sp_icon_paint(SPIcon *icon, GdkRectangle const *area);
  52
  53 static void sp_icon_screen_changed( GtkWidget *widget, GdkScreen *previous_screen );
  54 static void sp_icon_style_set( GtkWidget *widget, GtkStyle *previous_style );
  55 static void sp_icon_theme_changed( SPIcon *icon );
  56
  57 static guchar *sp_icon_image_load_pixmap(gchar const *name, unsigned lsize, unsigned psize);
  58 static guchar *sp_icon_image_load_svg(gchar const *name, unsigned lsize, unsigned psize);
  59
  60 static guchar *sp_icon_image_load(SPIcon *icon, gchar const *name);
  61
  62 static void sp_icon_overlay_pixels( guchar *px, int width, int height, int stride,
  63                                     unsigned r, unsigned g, unsigned b );
  64
  65 static void injectCustomSize();
  66
  67 static GtkWidgetClass *parent_class;
  68
  69 static bool sizeDirty = true;
  70
  71 static bool sizeMapDone = false;
  72 static GtkIconSize iconSizeLookup[] = {
  73     GTK_ICON_SIZE_INVALID,
  74     GTK_ICON_SIZE_MENU,
  75     GTK_ICON_SIZE_SMALL_TOOLBAR,
  76     GTK_ICON_SIZE_LARGE_TOOLBAR,
  77     GTK_ICON_SIZE_BUTTON,
  78     GTK_ICON_SIZE_DND,
  79     GTK_ICON_SIZE_DIALOG,
  80     GTK_ICON_SIZE_MENU, // for Inkscape::ICON_SIZE_DECORATION
  81 };
  82
  83 GtkType
  84 sp_icon_get_type()
  85 {
  86     static GtkType type = 0;
  87     if (!type) {
  88         GtkTypeInfo info = {
  89             "SPIcon",
  90             sizeof(SPIcon),
  91             sizeof(SPIconClass),
  92             (GtkClassInitFunc) sp_icon_class_init,
  93             (GtkObjectInitFunc) sp_icon_init,
  94             NULL, NULL, NULL
  95         };
  96         type = gtk_type_unique(GTK_TYPE_WIDGET, &info);
  97     }
  98     return type;
  99 }
 100
 101 static void
 102 sp_icon_class_init(SPIconClass *klass)
 103 {
 104     GtkObjectClass *object_class;
 105     GtkWidgetClass *widget_class;
 106
 107     object_class = (GtkObjectClass *) klass;
 108     widget_class = (GtkWidgetClass *) klass;
 109
 110     parent_class = (GtkWidgetClass*)g_type_class_peek_parent(klass);
 111
 112     object_class->destroy = sp_icon_destroy;
 113
 114     widget_class->size_request = sp_icon_size_request;
 115     widget_class->size_allocate = sp_icon_size_allocate;
 116     widget_class->expose_event = sp_icon_expose;
 117     widget_class->screen_changed = sp_icon_screen_changed;
 118     widget_class->style_set = sp_icon_style_set;
 119 }
 120
 121
 122 static void
 123 sp_icon_init(SPIcon *icon)
 124 {
 125     GTK_WIDGET_FLAGS(icon) |= GTK_NO_WINDOW;
 126     icon->lsize = Inkscape::ICON_SIZE_BUTTON;
 127     icon->psize = 0;
 128     icon->name = 0;
 129     icon->pb = 0;
 130     icon->pb_faded = 0;
 131 }
 132
 133 static void
 134 sp_icon_destroy(GtkObject *object)
 135 {
 136     SPIcon *icon = SP_ICON(object);
 137     sp_icon_clear(icon);
 138     if ( icon->name ) {
 139         g_free( icon->name );
 140         icon->name = 0;
 141     }
 142
 143     ((GtkObjectClass *) (parent_class))->destroy(object);
 144 }
 145
 146 static void sp_icon_reset( SPIcon *icon ) {
 147     icon->psize = 0;
 148     sp_icon_clear(icon);
 149 }
 150
 151 static void sp_icon_clear( SPIcon *icon ) {
 152     if (icon->pb) {
 153         g_object_unref(G_OBJECT(icon->pb));
 154         icon->pb = NULL;
 155     }
 156     if (icon->pb_faded) {
 157         g_object_unref(G_OBJECT(icon->pb_faded));
 158         icon->pb_faded = NULL;
 159     }
 160 }
 161
 162 static void
 163 sp_icon_size_request(GtkWidget *widget, GtkRequisition *requisition)
 164 {
 165     SPIcon const *icon = SP_ICON(widget);
 166
 167     int const size = ( icon->psize
 168                        ? icon->psize
 169                        : sp_icon_get_phys_size(icon->lsize) );
 170     requisition->width = size;
 171     requisition->height = size;
 172 }
 173
 174 static void
 175 sp_icon_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
 176 {
 177     widget->allocation = *allocation;
 178
 179     if (GTK_WIDGET_DRAWABLE(widget)) {
 180         gtk_widget_queue_draw(widget);
 181     }
 182 }
 183
 184 static int sp_icon_expose(GtkWidget *widget, GdkEventExpose *event)
 185 {
 186     if ( GTK_WIDGET_DRAWABLE(widget) ) {
 187         SPIcon *icon = SP_ICON(widget);
 188         if ( !icon->pb ) {
 189             sp_icon_fetch_pixbuf( icon );
 190         }
 191
 192         sp_icon_paint(SP_ICON(widget), &event->area);
 193     }
 194
 195     return TRUE;
 196 }
 197
 198 void sp_icon_fetch_pixbuf( SPIcon *icon )
 199 {
 200     if ( icon ) {
 201         if ( !icon->pb ) {
 202             guchar *pixels = 0;
 203
 204             icon->psize = sp_icon_get_phys_size(icon->lsize);
 205
 206             pixels = sp_icon_image_load( icon, icon->name );
 207
 208             if (pixels) {
 209                 // don't pass the g_free because we're caching the pixel
 210                 // space loaded through ...
 211                 // I just changed this. make sure sp_icon_image_load still does the right thing.
 212                 icon->pb = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 213                                                     icon->psize, icon->psize, icon->psize * 4,
 214                                                     /*(GdkPixbufDestroyNotify)g_free*/NULL, NULL);
 215                 icon->pb_faded = gdk_pixbuf_copy(icon->pb);
 216
 217                 pixels = gdk_pixbuf_get_pixels(icon->pb_faded);
 218                 size_t stride = gdk_pixbuf_get_rowstride(icon->pb_faded);
 219                 pixels += 3; // alpha
 220                 for ( int row = 0 ; row < icon->psize ; row++ ) {
 221                     guchar *row_pixels = pixels;
 222                     for ( int column = 0 ; column < icon->psize ; column++ ) {
 223                         *row_pixels = *row_pixels >> 1;
 224                         row_pixels += 4;
 225                     }
 226                     pixels += stride;
 227                 }
 228             } else {
 229                 /* TODO: We should do something more useful if we can't load the image. */
 230                 g_warning ("failed to load icon '%s'", icon->name);
 231             }
 232         }
 233     }
 234 }
 235
 236 static void sp_icon_screen_changed( GtkWidget *widget, GdkScreen *previous_screen )
 237 {
 238     if ( GTK_WIDGET_CLASS( parent_class )->screen_changed ) {
 239         GTK_WIDGET_CLASS( parent_class )->screen_changed( widget, previous_screen );
 240     }
 241     SPIcon *icon = SP_ICON(widget);
 242     sp_icon_theme_changed(icon);
 243 }
 244
 245 static void sp_icon_style_set( GtkWidget *widget, GtkStyle *previous_style )
 246 {
 247     if ( GTK_WIDGET_CLASS( parent_class )->style_set ) {
 248         GTK_WIDGET_CLASS( parent_class )->style_set( widget, previous_style );
 249     }
 250     SPIcon *icon = SP_ICON(widget);
 251     sp_icon_theme_changed(icon);
 252 }
 253
 254 static void sp_icon_theme_changed( SPIcon *icon )
 255 {
 256     //g_message("Got a change bump for this icon");
 257     sizeDirty = true;
 258     sp_icon_reset(icon);
 259     gtk_widget_queue_draw( GTK_WIDGET(icon) );
 260 }
 261
 262
 263 static GtkWidget *
 264 sp_icon_new_full( Inkscape::IconSize lsize, gchar const *name )
 265 {
 266     static gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpGtk", 0, 0, 1 );
 267     static gint fallback = prefs_get_int_attribute_limited( "debug.icons", "checkNames", 0, 0, 1 );
 268
 269     addPreRender( lsize, name );
 270
 271     GtkStockItem stock;
 272     gboolean tryLoad = gtk_stock_lookup( name, &stock );
 273     if ( !tryLoad && fallback ) {
 274         tryLoad |= strncmp("gtk-", name, 4 ) == 0;
 275     }
 276     if ( !tryLoad && fallback ) {
 277         tryLoad |= strncmp("gnome-", name, 6 ) == 0;
 278     }
 279
 280     GtkWidget *widget = 0;
 281     if ( tryLoad ) {
 282         gint trySize = CLAMP( static_cast<gint>(lsize), 0, static_cast<gint>(G_N_ELEMENTS(iconSizeLookup) - 1) );
 283
 284         if ( !sizeMapDone ) {
 285             injectCustomSize();
 286         }
 287
 288         GtkWidget *img = gtk_image_new_from_stock( name, iconSizeLookup[trySize] );
 289         if ( img ) {
 290             GtkImageType type = gtk_image_get_storage_type( GTK_IMAGE(img) );
 291             if ( type == GTK_IMAGE_STOCK ) {
 292                 widget = GTK_WIDGET(img);
 293                 img = 0;
 294
 295                 if ( dump ) {
 296                     g_message( "loaded gtk  '%s' %d  (GTK_IMAGE_STOCK)", name, lsize );
 297                 }
 298             } else {
 299                 if ( dump ) {
 300                     g_message( "skipped gtk '%s' %d  (not GTK_IMAGE_STOCK)", name, lsize );
 301                 }
 302                 g_object_unref( (GObject *)img );
 303                 img = 0;
 304             }
 305         }
 306     }
 307
 308     if ( !widget ) {
 309         SPIcon *icon = (SPIcon *)g_object_new(SP_TYPE_ICON, NULL);
 310         icon->lsize = lsize;
 311         icon->name = g_strdup(name);
 312         icon->psize = sp_icon_get_phys_size(lsize);
 313
 314         widget = GTK_WIDGET(icon);
 315     }
 316
 317     return widget;
 318 }
 319
 320 GtkWidget *
 321 sp_icon_new( Inkscape::IconSize lsize, gchar const *name )
 322 {
 323     return sp_icon_new_full( lsize, name );
 324 }
 325
 326 Gtk::Widget *sp_icon_get_icon( Glib::ustring const &oid, Inkscape::IconSize size )
 327 {
 328     Gtk::Widget *result = 0;
 329     GtkWidget *widget = sp_icon_new_full( size, oid.c_str() );
 330
 331     if ( widget ) {
 332         if ( GTK_IS_IMAGE(widget) ) {
 333             GtkImage *img = GTK_IMAGE(widget);
 334             result = Glib::wrap( img );
 335         } else {
 336             result = Glib::wrap( widget );
 337         }
 338     }
 339
 340     return result;
 341 }
 342
 343 // Try to load the named svg, falling back to pixmaps
 344 guchar *
 345 sp_icon_image_load( SPIcon *icon, gchar const *name )
 346 {
 347     guchar *px = sp_icon_image_load_svg( name, icon->lsize, icon->psize );
 348     if (!px) {
 349         px = sp_icon_image_load_pixmap(name, icon->lsize, icon->psize);
 350     }
 351
 352     return px;
 353 }
 354
 355 GtkIconSize
 356 sp_icon_get_gtk_size(int size)
 357 {
 358     static GtkIconSize map[64] = {(GtkIconSize)0};
 359     size = CLAMP(size, 4, 63);
 360     if (!map[size]) {
 361         static int count = 0;
 362         char c[64];
 363         g_snprintf(c, 64, "InkscapeIcon%d", count++);
 364         map[size] = gtk_icon_size_register(c, size, size);
 365     }
 366     return map[size];
 367 }
 368
 369 static void injectCustomSize()
 370 {
 371     // TODO - still need to handle the case of theme changes and resize, especially as we can't re-register a string.
 372     if ( !sizeMapDone )
 373     {
 374         gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpDefault", 0, 0, 1 );
 375         gint width = 0;
 376         gint height = 0;
 377         if ( gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &width, &height ) ) {
 378             gint newWidth = ((width * 3) / 4);
 379             gint newHeight = ((height * 3) / 4);
 380             GtkIconSize newSizeEnum = gtk_icon_size_register( "inkscape-decoration", newWidth, newHeight );
 381             if ( newSizeEnum ) {
 382                 if ( dump ) {
 383                     g_message("Registered (%d, %d) <= (%d, %d) as index %d", newWidth, newHeight, width, height, newSizeEnum);
 384                 }
 385                 guint index = static_cast<guint>(Inkscape::ICON_SIZE_DECORATION);
 386                 if ( index < G_N_ELEMENTS(iconSizeLookup) ) {
 387                     iconSizeLookup[index] = newSizeEnum;
 388                 } else if ( dump ) {
 389                     g_message("size lookup array too small to store entry");
 390                 }
 391             }
 392         }
 393         sizeMapDone = true;
 394     }
 395
 396 }
 397
 398 int sp_icon_get_phys_size(int size)
 399 {
 400     static bool init = false;
 401     static int lastSys[Inkscape::ICON_SIZE_DECORATION + 1];
 402     static int vals[Inkscape::ICON_SIZE_DECORATION + 1];
 403
 404     size = CLAMP( size, GTK_ICON_SIZE_MENU, Inkscape::ICON_SIZE_DECORATION );
 405
 406     if ( !sizeMapDone ) {
 407         injectCustomSize();
 408     }
 409
 410     if ( sizeDirty && init ) {
 411         GtkIconSize const gtkSizes[] = {
 412             GTK_ICON_SIZE_MENU,
 413             GTK_ICON_SIZE_SMALL_TOOLBAR,
 414             GTK_ICON_SIZE_LARGE_TOOLBAR,
 415             GTK_ICON_SIZE_BUTTON,
 416             GTK_ICON_SIZE_DND,
 417             GTK_ICON_SIZE_DIALOG,
 418             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 419                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 420                 GTK_ICON_SIZE_MENU
 421         };
 422         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes) && init; ++i) {
 423             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 424
 425             g_assert( val_ix < G_N_ELEMENTS(vals) );
 426
 427             gint width = 0;
 428             gint height = 0;
 429             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 430                 init &= (lastSys[val_ix] == std::max(width, height));
 431             }
 432         }
 433     }
 434
 435     if ( !init ) {
 436         sizeDirty = false;
 437         gint dump = prefs_get_int_attribute_limited( "debug.icons", "dumpDefault", 0, 0, 1 );
 438
 439         if ( dump ) {
 440             g_message( "Default icon sizes:" );
 441         }
 442         memset( vals, 0, sizeof(vals) );
 443         memset( lastSys, 0, sizeof(lastSys) );
 444         GtkIconSize const gtkSizes[] = {
 445             GTK_ICON_SIZE_MENU,
 446             GTK_ICON_SIZE_SMALL_TOOLBAR,
 447             GTK_ICON_SIZE_LARGE_TOOLBAR,
 448             GTK_ICON_SIZE_BUTTON,
 449             GTK_ICON_SIZE_DND,
 450             GTK_ICON_SIZE_DIALOG,
 451             static_cast<guint>(Inkscape::ICON_SIZE_DECORATION) < G_N_ELEMENTS(iconSizeLookup) ?
 452                 iconSizeLookup[static_cast<int>(Inkscape::ICON_SIZE_DECORATION)] :
 453                 GTK_ICON_SIZE_MENU
 454         };
 455         gchar const *const names[] = {
 456             "GTK_ICON_SIZE_MENU",
 457             "GTK_ICON_SIZE_SMALL_TOOLBAR",
 458             "GTK_ICON_SIZE_LARGE_TOOLBAR",
 459             "GTK_ICON_SIZE_BUTTON",
 460             "GTK_ICON_SIZE_DND",
 461             "GTK_ICON_SIZE_DIALOG",
 462             "inkscape-decoration"
 463         };
 464
 465         GtkWidget *icon = (GtkWidget *)g_object_new(SP_TYPE_ICON, NULL);
 466
 467         for (unsigned i = 0; i < G_N_ELEMENTS(gtkSizes); ++i) {
 468             guint const val_ix = (gtkSizes[i] <= GTK_ICON_SIZE_DIALOG) ? (guint)gtkSizes[i] : (guint)Inkscape::ICON_SIZE_DECORATION;
 469
 470             g_assert( val_ix < G_N_ELEMENTS(vals) );
 471
 472             gint width = 0;
 473             gint height = 0;
 474             bool used = false;
 475             if ( gtk_icon_size_lookup(gtkSizes[i], &width, &height ) ) {
 476                 vals[val_ix] = std::max(width, height);
 477                 lastSys[val_ix] = vals[val_ix];
 478                 used = true;
 479             }
 480             if (dump) {
 481                 g_message(" =--  %u  size:%d  %c(%d, %d)   '%s'",
 482                           i, gtkSizes[i],
 483                           ( used ? ' ' : 'X' ), width, height, names[i]);
 484             }
 485             gchar const *id = GTK_STOCK_OPEN;
 486             GdkPixbuf *pb = gtk_widget_render_icon( icon, id, gtkSizes[i], NULL);
 487             if (pb) {
 488                 width = gdk_pixbuf_get_width(pb);
 489                 height = gdk_pixbuf_get_height(pb);
 490                 int newSize = std::max( width, height );
 491                 // TODO perhaps check a few more stock icons to get a range on sizes.
 492                 if ( newSize > 0 ) {
 493                     vals[val_ix] = newSize;
 494                 }
 495                 if (dump) {
 496                     g_message("      %u  size:%d   (%d, %d)", i, gtkSizes[i], width, height);
 497                 }
 498
 499                 g_object_unref(G_OBJECT(pb));
 500             }
 501         }
 502         //g_object_unref(icon);
 503         init = true;
 504     }
 505
 506     return vals[size];
 507 }
 508
 509 static void sp_icon_paint(SPIcon *icon, GdkRectangle const *area)
 510 {
 511     GtkWidget &widget = *GTK_WIDGET(icon);
 512
 513     GdkPixbuf *image = GTK_WIDGET_IS_SENSITIVE(&widget) ? icon->pb : icon->pb_faded;
 514
 515     if (image) {
 516         int const padx = ( ( widget.allocation.width > icon->psize )
 517                            ? ( widget.allocation.width - icon->psize ) / 2
 518                            : 0 );
 519         int const pady = ( ( widget.allocation.height > icon->psize )
 520                            ? ( widget.allocation.height - icon->psize ) / 2
 521                            : 0 );
 522
 523         int const x0 = std::max(area->x, widget.allocation.x + padx);
 524         int const y0 = std::max(area->y, widget.allocation.y + pady);
 525         int const x1 = std::min(area->x + area->width,  widget.allocation.x + padx + static_cast<int>(icon->psize) );
 526         int const y1 = std::min(area->y + area->height, widget.allocation.y + pady + static_cast<int>(icon->psize) );
 527
 528         int width = x1 - x0;
 529         int height = y1 - y0;
 530         // Limit drawing to when we actually have something. Avoids some crashes.
 531         if ( (width > 0) && (height > 0) ) {
 532             gdk_draw_pixbuf(GDK_DRAWABLE(widget.window), NULL, image,
 533                             x0 - widget.allocation.x - padx,
 534                             y0 - widget.allocation.y - pady,
 535                             x0, y0,
 536                             width, height,
 537                             GDK_RGB_DITHER_NORMAL, x0, y0);
 538         }
 539     }
 540 }
 541
 542 static guchar *
 543 sp_icon_image_load_pixmap(gchar const *name, unsigned /*lsize*/, unsigned psize)
 544 {
 545     gchar *path;
 546     guchar *px;
 547     GdkPixbuf *pb;
 548
 549     path = (gchar *) g_strdup_printf("%s/%s.png", INKSCAPE_PIXMAPDIR, name);
 550     // TODO: bulia, please look over
 551     gsize bytesRead = 0;
 552     gsize bytesWritten = 0;
 553     GError *error = NULL;
 554     gchar *localFilename = g_filename_from_utf8( path,
 555                                                  -1,
 556                                                  &bytesRead,
 557                                                  &bytesWritten,
 558                                                  &error);
 559     pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 560     g_free(localFilename);
 561     g_free(path);
 562     if (!pb) {
 563         path = (gchar *) g_strdup_printf("%s/%s.xpm", INKSCAPE_PIXMAPDIR, name);
 564         // TODO: bulia, please look over
 565         gsize bytesRead = 0;
 566         gsize bytesWritten = 0;
 567         GError *error = NULL;
 568         gchar *localFilename = g_filename_from_utf8( path,
 569                                                      -1,
 570                                                      &bytesRead,
 571                                                      &bytesWritten,
 572                                                      &error);
 573         pb = gdk_pixbuf_new_from_file(localFilename, NULL);
 574         g_free(localFilename);
 575         g_free(path);
 576     }
 577     if (pb) {
 578         if (!gdk_pixbuf_get_has_alpha(pb))
 579             gdk_pixbuf_add_alpha(pb, FALSE, 0, 0, 0);
 580         if ( ( static_cast<unsigned>(gdk_pixbuf_get_width(pb)) != psize )
 581              || ( static_cast<unsigned>(gdk_pixbuf_get_height(pb)) != psize ) ) {
 582             GdkPixbuf *spb = gdk_pixbuf_scale_simple(pb, psize, psize, GDK_INTERP_HYPER);
 583             g_object_unref(G_OBJECT(pb));
 584             pb = spb;
 585         }
 586         guchar *spx = gdk_pixbuf_get_pixels(pb);
 587         int srs = gdk_pixbuf_get_rowstride(pb);
 588         px = g_new(guchar, 4 * psize * psize);
 589         for (unsigned y = 0; y < psize; y++) {
 590             memcpy(px + 4 * y * psize, spx + y * srs, 4 * psize);
 591         }
 592         g_object_unref(G_OBJECT(pb));
 593
 594         return px;
 595     }
 596
 597     return NULL;
 598 }
 599
 600 // takes doc, root, icon, and icon name to produce pixels
 601 extern "C" guchar *
 602 sp_icon_doc_icon( SPDocument *doc, NRArenaItem *root,
 603                   gchar const *name, unsigned psize )
 604 {
 605     gint const dump = prefs_get_int_attribute_limited( "debug.icons", "dumpSvg", 0, 0, 1 );
 606     guchar *px = NULL;
 607
 608     if (doc) {
 609         SPObject *object = doc->getObjectById(name);
 610         if (object && SP_IS_ITEM(object)) {
 611             /* Find bbox in document */
 612             NR::Matrix const i2doc(sp_item_i2doc_affine(SP_ITEM(object)));
 613             NR::Maybe<NR::Rect> dbox = SP_ITEM(object)->getBounds(i2doc);
 614
 615             if ( SP_OBJECT_PARENT(object) == NULL )
 616             {
 617                 dbox = NR::Rect(NR::Point(0, 0),
 618                                 NR::Point(sp_document_width(doc), sp_document_height(doc)));
 619             }
 620
 621             /* This is in document coordinates, i.e. pixels */
 622             if ( dbox && !dbox->isEmpty() ) {
 623                 NRGC gc(NULL);
 624                 /* Update to renderable state */
 625                 double sf = 1.0;
 626                 nr_arena_item_set_transform(root, NR::Matrix(NR::scale(sf, sf)));
 627                 gc.transform.set_identity();
 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_arena_item_set_transform(root, NR::Matrix(NR::scale(sf, sf)));
 659                         gc.transform.set_identity();
 660                         nr_arena_item_invoke_update( root, NULL, &gc,
 661                                                      NR_ARENA_ITEM_STATE_ALL,
 662                                                      NR_ARENA_ITEM_STATE_NONE );
 663                         /* Item integer bbox in points */
 664                         ibox.x0 = (int) floor(sf * dbox->min()[NR::X] + 0.5);
 665                         ibox.y0 = (int) floor(sf * dbox->min()[NR::Y] + 0.5);
 666                         ibox.x1 = (int) floor(sf * dbox->max()[NR::X] + 0.5);
 667                         ibox.y1 = (int) floor(sf * dbox->max()[NR::Y] + 0.5);
 668
 669                         if ( dump ) {
 670                             g_message( "   box2   --'%s'  (%f,%f)-(%f,%f)", name, (double)ibox.x0, (double)ibox.y0, (double)ibox.x1, (double)ibox.y1 );
 671                         }
 672
 673                         /* Find button visible area */
 674                         width = ibox.x1 - ibox.x0;
 675                         height = ibox.y1 - ibox.y0;
 676                         if ( dump ) {
 677                             g_message( "   vis2   --'%s'  (%d,%d)", name, width, height );
 678                         }
 679                     }
 680                 }
 681
 682                 int dx, dy;
 683                 //dx = (psize - width) / 2;
 684                 //dy = (psize - height) / 2;
 685                 dx=dy=psize;
 686                 dx=(dx-width)/2; // watch out for psize, since 'unsigned'-'signed' can cause problems if the result is negative
 687                 dy=(dy-height)/2;
 688                 NRRectL area;
 689                 area.x0 = ibox.x0 - dx;
 690                 area.y0 = ibox.y0 - dy;
 691                 area.x1 = area.x0 + psize;
 692                 area.y1 = area.y0 + psize;
 693                 /* Actual renderable area */
 694                 NRRectL ua;
 695                 ua.x0 = MAX(ibox.x0, area.x0);
 696                 ua.y0 = MAX(ibox.y0, area.y0);
 697                 ua.x1 = MIN(ibox.x1, area.x1);
 698                 ua.y1 = MIN(ibox.y1, area.y1);
 699
 700                 if ( dump ) {
 701                     g_message( "   area   --'%s'  (%f,%f)-(%f,%f)", name, (double)area.x0, (double)area.y0, (double)area.x1, (double)area.y1 );
 702                     g_message( "   ua     --'%s'  (%f,%f)-(%f,%f)", name, (double)ua.x0, (double)ua.y0, (double)ua.x1, (double)ua.y1 );
 703                 }
 704                 /* Set up pixblock */
 705                 px = g_new(guchar, 4 * psize * psize);
 706                 memset(px, 0x00, 4 * psize * psize);
 707                 /* Render */
 708                 NRPixBlock B;
 709                 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 710                                           ua.x0, ua.y0, ua.x1, ua.y1,
 711                                           px + 4 * psize * (ua.y0 - area.y0) +
 712                                           4 * (ua.x0 - area.x0),
 713                                           4 * psize, FALSE, FALSE );
 714                 nr_arena_item_invoke_render(NULL, root, &ua, &B,
 715                                              NR_ARENA_ITEM_RENDER_NO_CACHE );
 716                 nr_pixblock_release(&B);
 717
 718                 gint useOverlay = prefs_get_int_attribute_limited( "debug.icons", "overlaySvg", 0, 0, 1 );
 719                 if ( useOverlay ) {
 720                     sp_icon_overlay_pixels( px, psize, psize, 4 * psize, 0x00, 0x00, 0xff );
 721                 }
 722             }
 723         }
 724     }
 725
 726     return px;
 727 } // end of sp_icon_doc_icon()
 728
 729
 730
 731 struct svg_doc_cache_t
 732 {
 733     SPDocument *doc;
 734     NRArenaItem *root;
 735 };
 736
 737 static std::map<Glib::ustring, svg_doc_cache_t *> doc_cache;
 738 static std::map<Glib::ustring, guchar *> px_cache;
 739
 740 static Glib::ustring icon_cache_key(gchar const *name,
 741                                     unsigned lsize, unsigned psize)
 742 {
 743     Glib::ustring key=name;
 744     key += ":";
 745     key += lsize;
 746     key += ":";
 747     key += psize;
 748     return key;
 749 }
 750
 751 static guchar *get_cached_pixels(Glib::ustring const &key) {
 752     std::map<Glib::ustring, guchar *>::iterator found=px_cache.find(key);
 753     if ( found != px_cache.end() ) {
 754         return found->second;
 755     }
 756     return NULL;
 757 }
 758
 759 static guchar *load_svg_pixels(gchar const *name,
 760                                unsigned /*lsize*/, unsigned psize)
 761 {
 762     SPDocument *doc = NULL;
 763     NRArenaItem *root = NULL;
 764     svg_doc_cache_t *info = NULL;
 765
 766     // Fall back from user prefs dir into system locations.
 767     Glib::ustring iconsvg = name;
 768     iconsvg += ".svg";
 769     std::list<gchar *> sources;
 770     sources.push_back(g_build_filename(profile_path("icons"),iconsvg.c_str(), NULL));
 771     sources.push_back(g_build_filename(profile_path("icons"),"icons.svg", NULL));
 772     sources.push_back(g_build_filename(INKSCAPE_PIXMAPDIR, iconsvg.c_str(), NULL));
 773     sources.push_back(g_build_filename(INKSCAPE_PIXMAPDIR, "icons.svg", NULL));
 774
 775     // Try each document in turn until we successfully load the icon from one
 776     guchar *px=NULL;
 777     while ( !sources.empty() && !px ) {
 778         gchar *doc_filename = sources.front();
 779
 780         // Did we already load this doc?
 781         Glib::ustring key(doc_filename);
 782         info = 0;
 783         {
 784             std::map<Glib::ustring, svg_doc_cache_t *>::iterator i = doc_cache.find(key);
 785             if ( i != doc_cache.end() ) {
 786                 info = i->second;
 787             }
 788         }
 789
 790         /* Try to load from document. */
 791         if (!info &&
 792             Inkscape::IO::file_test( doc_filename, G_FILE_TEST_IS_REGULAR ) &&
 793             (doc = sp_document_new( doc_filename, FALSE )) ) {
 794
 795             // prep the document
 796             sp_document_ensure_up_to_date(doc);
 797             /* Create new arena */
 798             NRArena *arena = NRArena::create();
 799             /* Create ArenaItem and set transform */
 800             unsigned visionkey = sp_item_display_key_new(1);
 801             /* fixme: Memory manage root if needed (Lauris) */
 802             root = sp_item_invoke_show( SP_ITEM(SP_DOCUMENT_ROOT(doc)),
 803                                         arena, visionkey, SP_ITEM_SHOW_DISPLAY );
 804
 805             // store into the cache
 806             info = new svg_doc_cache_t;
 807             g_assert(info);
 808
 809             info->doc=doc;
 810             info->root=root;
 811             doc_cache[key]=info;
 812         }
 813         if (info) {
 814             doc=info->doc;
 815             root=info->root;
 816         }
 817
 818         // toss the filename
 819         g_free(doc_filename);
 820         sources.pop_front();
 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     }
 827
 828     return px;
 829 }
 830
 831 // returns true if icon needed preloading, false if nothing was done
 832 static bool prerender_icon(gchar const *name, unsigned lsize, unsigned psize)
 833 {
 834     Glib::ustring key = icon_cache_key(name, lsize, psize);
 835     guchar *px = get_cached_pixels(key);
 836     if (px) {
 837         return false;
 838     } else {
 839         px = load_svg_pixels(name, lsize, psize);
 840         if (px) {
 841             px_cache[key] = px;
 842         }
 843         return true;
 844     }
 845 }
 846
 847 static guchar *
 848 sp_icon_image_load_svg(gchar const *name, unsigned lsize, unsigned psize)
 849 {
 850     Glib::ustring key = icon_cache_key(name, lsize, psize);
 851
 852     // did we already load this icon at this scale/size?
 853     guchar *px = get_cached_pixels(key);
 854     if (!px) {
 855         px = load_svg_pixels(name, lsize, psize);
 856         if (px) {
 857             px_cache[key] = px;
 858         }
 859     }
 860     return px;
 861 }
 862
 863 void sp_icon_overlay_pixels(guchar *px, int width, int height, int stride,
 864                             unsigned r, unsigned g, unsigned b)
 865 {
 866     for ( int y = 0; y < height; y += 4 ) {
 867         guchar *ptr = px + y * stride;
 868         for ( int x = 0; x < width; x += 4 ) {
 869             *(ptr++) = r;
 870             *(ptr++) = g;
 871             *(ptr++) = b;
 872             *(ptr++) = 0xff;
 873
 874             ptr += 4 * 3;
 875         }
 876     }
 877
 878     if ( width > 1 && height > 1 ) {
 879         // point at the last pixel
 880         guchar *ptr = px + ((height-1) * stride) + ((width - 1) * 4);
 881
 882         if ( width > 2 ) {
 883             px[4] = r;
 884             px[5] = g;
 885             px[6] = b;
 886             px[7] = 0xff;
 887
 888             ptr[-12] = r;
 889             ptr[-11] = g;
 890             ptr[-10] = b;
 891             ptr[-9] = 0xff;
 892         }
 893
 894         ptr[-4] = r;
 895         ptr[-3] = g;
 896         ptr[-2] = b;
 897         ptr[-1] = 0xff;
 898
 899         px[0 + stride] = r;
 900         px[1 + stride] = g;
 901         px[2 + stride] = b;
 902         px[3 + stride] = 0xff;
 903
 904         ptr[0 - stride] = r;
 905         ptr[1 - stride] = g;
 906         ptr[2 - stride] = b;
 907         ptr[3 - stride] = 0xff;
 908
 909         if ( height > 2 ) {
 910             ptr[0 - stride * 3] = r;
 911             ptr[1 - stride * 3] = g;
 912             ptr[2 - stride * 3] = b;
 913             ptr[3 - stride * 3] = 0xff;
 914         }
 915     }
 916 }
 917
 918 class preRenderItem
 919 {
 920 public:
 921     preRenderItem( Inkscape::IconSize lsize, gchar const *name ) :
 922         _lsize( lsize ),
 923         _name( name )
 924     {}
 925     Inkscape::IconSize _lsize;
 926     Glib::ustring _name;
 927 };
 928
 929
 930 #include <queue>
 931
 932 static std::queue<preRenderItem> pendingRenders;
 933 static bool callbackHooked = false;
 934
 935 static void addPreRender( Inkscape::IconSize lsize, gchar const *name )
 936 {
 937
 938     if ( !callbackHooked )
 939     {
 940         callbackHooked = true;
 941         g_idle_add_full( G_PRIORITY_LOW, &icon_prerender_task, NULL, NULL );
 942     }
 943
 944     pendingRenders.push(preRenderItem(lsize, name));
 945 }
 946
 947 gboolean icon_prerender_task(gpointer /*data*/) {
 948     if (!pendingRenders.empty()) {
 949         preRenderItem single=pendingRenders.front();
 950         pendingRenders.pop();
 951         int psize = sp_icon_get_phys_size(single._lsize);
 952         prerender_icon(single._name.c_str(), single._lsize, psize);
 953     }
 954
 955     if (!pendingRenders.empty()) {
 956         return TRUE;
 957     } else {
 958         callbackHooked = false;
 959         return FALSE;
 960     }
 961 }
 962
 963 /*
 964   Local Variables:
 965   mode:c++
 966   c-file-style:"stroustrup"
 967   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 968   indent-tabs-mode:nil
 969   fill-column:99
 970   End:
 971 */
 972 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :