/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */ /* * Copyright (C) 2004 Anders Carlsson <andersca@gnome.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ #include <config.h> #include "ev-utils.h" #include "ev-file-helpers.h" #include <string.h> #include <math.h> #include <glib/gi18n.h> typedef struct { int size; double *data; } ConvFilter; static double gaussian (double x, double y, double r) { return ((1 / (2 * M_PI * r)) * exp ((- (x * x + y * y)) / (2 * r * r))); } static ConvFilter * create_blur_filter (int radius) { ConvFilter *filter; int x, y; double sum; filter = g_new0 (ConvFilter, 1); filter->size = radius * 2 + 1; filter->data = g_new (double, filter->size * filter->size); sum = 0.0; for (y = 0 ; y < filter->size; y++) { for (x = 0 ; x < filter->size; x++) { sum += filter->data[y * filter->size + x] = gaussian (x - (filter->size >> 1), y - (filter->size >> 1), radius); } } for (y = 0; y < filter->size; y++) { for (x = 0; x < filter->size; x++) { filter->data[y * filter->size + x] /= sum; } } return filter; } static GdkPixbuf * create_shadow (GdkPixbuf *src, int blur_radius, int x_offset, int y_offset, double opacity) { int x, y, i, j; int width, height; GdkPixbuf *dest; static ConvFilter *filter = NULL; int src_rowstride, dest_rowstride; int src_bpp, dest_bpp; guchar *src_pixels, *dest_pixels; if (!filter) filter = create_blur_filter (blur_radius); if (x_offset < 0) x_offset = (blur_radius * 4) / 5; if (y_offset < 0) y_offset = (blur_radius * 4) / 5; width = gdk_pixbuf_get_width (src) + blur_radius * 2 + x_offset; height = gdk_pixbuf_get_height (src) + blur_radius * 2 + y_offset; dest = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (src), TRUE, gdk_pixbuf_get_bits_per_sample (src), width, height); gdk_pixbuf_fill (dest, 0); src_pixels = gdk_pixbuf_get_pixels (src); src_rowstride = gdk_pixbuf_get_rowstride (src); src_bpp = gdk_pixbuf_get_has_alpha (src) ? 4 : 3; dest_pixels = gdk_pixbuf_get_pixels (dest); dest_rowstride = gdk_pixbuf_get_rowstride (dest); dest_bpp = gdk_pixbuf_get_has_alpha (dest) ? 4 : 3; for (y = 0; y < height; y++) { for (x = 0; x < width; x++) { int sumr = 0, sumg = 0, sumb = 0, suma = 0; for (i = 0; i < filter->size; i++) { for (j = 0; j < filter->size; j++) { int src_x, src_y; src_y = -(blur_radius + x_offset) + y - (filter->size >> 1) + i; src_x = -(blur_radius + y_offset) + x - (filter->size >> 1) + j; if (src_y < 0 || src_y > gdk_pixbuf_get_height (src) || src_x < 0 || src_x > gdk_pixbuf_get_width (src)) continue; sumr += src_pixels [src_y * src_rowstride + src_x * src_bpp + 0] * filter->data [i * filter->size + j]; sumg += src_pixels [src_y * src_rowstride + src_x * src_bpp + 1] * filter->data [i * filter->size + j]; sumb += src_pixels [src_y * src_rowstride + src_x * src_bpp + 2] * filter->data [i * filter->size + j]; if (src_bpp == 4) suma += src_pixels [src_y * src_rowstride + src_x * src_bpp + 3] * filter->data [i * filter->size + j]; else suma += 0xff; } } if (dest_bpp == 4) dest_pixels [y * dest_rowstride + x * dest_bpp + 3] = (suma * opacity) / (filter->size * filter->size); } } return dest; } GdkPixbuf * ev_pixbuf_add_shadow (GdkPixbuf *src, int size, int x_offset, int y_offset, double opacity) { GdkPixbuf *dest; dest = create_shadow (src, size, x_offset, y_offset, opacity); gdk_pixbuf_composite (src, dest, size, size, gdk_pixbuf_get_width (src), gdk_pixbuf_get_height (src), size, size, 1.0, 1.0, GDK_INTERP_NEAREST, 255); return dest; } /* Simple function to output the contents of a region. Used solely for testing * the region code. */ void ev_print_region_contents (cairo_region_t *region) { gint n_rectangles, i; if (region == NULL) { g_print ("<empty region>\n"); return; } g_print ("<region %p>\n", region); n_rectangles = cairo_region_num_rectangles (region); for (i = 0; i < n_rectangles; i++) { GdkRectangle rect; cairo_region_get_rectangle (region, i, &rect); g_print ("\t(%d %d, %d %d) [%dx%d]\n", rect.x, rect.y, rect.x + rect.width, rect.y + rect.height, rect.width, rect.height); } } static void ev_gui_sanitise_popup_position (GtkMenu *menu, GtkWidget *widget, gint *x, gint *y) { GdkScreen *screen = gtk_widget_get_screen (widget); gint monitor_num; GdkRectangle monitor; GtkRequisition req; g_return_if_fail (widget != NULL); #if GTK_CHECK_VERSION (3, 0, 0) gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL); #else gtk_widget_size_request (GTK_WIDGET (menu), &req); #endif monitor_num = gdk_screen_get_monitor_at_point (screen, *x, *y); gtk_menu_set_monitor (menu, monitor_num); gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor); *x = CLAMP (*x, monitor.x, monitor.x + MAX (0, monitor.width - req.width)); *y = CLAMP (*y, monitor.y, monitor.y + MAX (0, monitor.height - req.height)); } void ev_gui_menu_position_tree_selection (GtkMenu *menu, gint *x, gint *y, gboolean *push_in, gpointer user_data) { GtkTreeSelection *selection; GList *selected_rows; GtkTreeModel *model; GtkTreeView *tree_view = GTK_TREE_VIEW (user_data); GtkWidget *widget = GTK_WIDGET (user_data); GtkRequisition req; GtkAllocation allocation; GdkRectangle visible; #if GTK_CHECK_VERSION (3, 0, 0) gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL); #else gtk_widget_size_request (GTK_WIDGET (menu), &req); #endif gdk_window_get_origin (gtk_widget_get_window (widget), x, y); gtk_widget_get_allocation (widget, &allocation); *x += (allocation.width - req.width) / 2; /* Add on height for the treeview title */ gtk_tree_view_get_visible_rect (tree_view, &visible); *y += allocation.height - visible.height; selection = gtk_tree_view_get_selection (tree_view); selected_rows = gtk_tree_selection_get_selected_rows (selection, &model); if (selected_rows) { GdkRectangle cell_rect; gtk_tree_view_get_cell_area (tree_view, selected_rows->data, NULL, &cell_rect); *y += CLAMP (cell_rect.y + cell_rect.height, 0, visible.height); g_list_foreach (selected_rows, (GFunc)gtk_tree_path_free, NULL); g_list_free (selected_rows); } ev_gui_sanitise_popup_position (menu, widget, x, y); } /** * get_num_monitors: Get the number of user monitors. * @window: optional GtkWindow to look at. * * Returns: Number of monitors, -1 if uncertain situation (like multiple screens) */ gint get_num_monitors (GtkWindow *window) { GdkDisplay *display; GdkScreen *screen; gint num_screen; display = gdk_display_get_default (); num_screen = gdk_display_get_n_screens (display); if (num_screen != 1) return -1; if (window) screen = gtk_window_get_screen (window); else screen = gdk_display_get_screen (display, 0); return gdk_screen_get_n_monitors (screen); } void file_chooser_dialog_add_writable_pixbuf_formats (GtkFileChooser *chooser) { GSList *pixbuf_formats = NULL; GSList *iter; GtkFileFilter *filter; int i; filter = gtk_file_filter_new(); gtk_file_filter_set_name (filter, _("By extension")); g_object_set_data (G_OBJECT(filter), "pixbuf-format", NULL); gtk_file_chooser_add_filter (chooser, filter); pixbuf_formats = gdk_pixbuf_get_formats (); for (iter = pixbuf_formats; iter; iter = iter->next) { GdkPixbufFormat *format = iter->data; gchar *description, *name, *extensions; gchar **extension_list, **mime_types; if (gdk_pixbuf_format_is_disabled (format) || !gdk_pixbuf_format_is_writable (format)) continue; name = gdk_pixbuf_format_get_description (format); extension_list = gdk_pixbuf_format_get_extensions (format); extensions = g_strjoinv (", ", extension_list); g_strfreev (extension_list); description = g_strdup_printf ("%s (%s)", name, extensions); filter = gtk_file_filter_new (); gtk_file_filter_set_name (filter, description); g_object_set_data (G_OBJECT (filter), "pixbuf-format", format); gtk_file_chooser_add_filter (chooser, filter); g_free (description); g_free (extensions); g_free (name); mime_types = gdk_pixbuf_format_get_mime_types (format); for (i = 0; mime_types[i] != 0; i++) gtk_file_filter_add_mime_type (filter, mime_types[i]); g_strfreev (mime_types); } g_slist_free (pixbuf_formats); } GdkPixbufFormat* get_gdk_pixbuf_format_by_extension (gchar *uri) { GSList *pixbuf_formats = NULL; GSList *iter; int i; pixbuf_formats = gdk_pixbuf_get_formats (); for (iter = pixbuf_formats; iter; iter = iter->next) { gchar **extension_list; GdkPixbufFormat *format = iter->data; if (gdk_pixbuf_format_is_disabled (format) || !gdk_pixbuf_format_is_writable (format)) continue; extension_list = gdk_pixbuf_format_get_extensions (format); for (i = 0; extension_list[i] != 0; i++) { if (g_str_has_suffix (uri, extension_list[i])) { g_slist_free (pixbuf_formats); g_strfreev (extension_list); return format; } } g_strfreev (extension_list); } g_slist_free (pixbuf_formats); return NULL; }