390 lines
12 KiB
C
390 lines
12 KiB
C
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/* blib - Library of useful things to hack the Blinkenlights
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*
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* Copyright (c) 2001-2004 The Blinkenlights Crew
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* Sven Neumann <sven@gimp.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "blib/blib.h"
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#include "bview-pixbuf.h"
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#include "bview-gtk.h"
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static void b_view_gtk_class_init (BViewGtkClass *class);
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static void b_view_gtk_init (BViewGtk *view);
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static void b_view_gtk_finalize (GObject *object);
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static void b_view_gtk_realize (GtkWidget *widget);
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static void b_view_gtk_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static gboolean b_view_gtk_expose_event (GtkWidget *widget,
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GdkEventExpose *event);
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static gboolean b_view_gtk_alloc_color (GdkDrawable *drawable,
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BColor *color,
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GdkColor *gdk_color);
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static GdkDrawable * b_view_gtk_get_drawable (BViewGtk *view,
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const gchar *filename,
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GdkWindow *window);
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static GtkDrawingAreaClass *parent_class = NULL;
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GType
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b_view_gtk_get_type (void)
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{
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static GType view_type = 0;
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if (!view_type)
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{
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static const GTypeInfo view_info =
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{
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sizeof (BViewGtkClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) b_view_gtk_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (BViewGtk),
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0, /* n_preallocs */
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(GInstanceInitFunc) b_view_gtk_init,
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};
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view_type = g_type_register_static (GTK_TYPE_DRAWING_AREA,
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"BViewGtk", &view_info, 0);
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}
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return view_type;
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}
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static void
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b_view_gtk_class_init (BViewGtkClass *class)
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{
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GObjectClass *object_class;
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GtkWidgetClass *widget_class;
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parent_class = g_type_class_peek_parent (class);
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object_class = G_OBJECT_CLASS (class);
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widget_class = GTK_WIDGET_CLASS (class);
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object_class->finalize = b_view_gtk_finalize;
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widget_class->realize = b_view_gtk_realize;
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widget_class->size_request = b_view_gtk_size_request;
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widget_class->expose_event = b_view_gtk_expose_event;
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}
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static void
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b_view_gtk_init (BViewGtk *view)
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{
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view->pixview = NULL;
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view->theme = NULL;
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view->frame_data = NULL;
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view->drawables = g_hash_table_new_full (g_str_hash, g_str_equal,
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(GDestroyNotify) NULL,
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(GDestroyNotify) g_object_unref);
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}
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static void
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b_view_gtk_finalize (GObject *object)
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{
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BViewGtk *view = B_VIEW_GTK (object);
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g_free (view->frame_data);
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g_hash_table_destroy (view->drawables);
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g_object_unref (view->theme);
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g_object_unref (view->pixview);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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b_view_gtk_realize (GtkWidget *widget)
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{
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BViewGtk *view = B_VIEW_GTK (widget);
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GdkColor color;
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GTK_WIDGET_CLASS (parent_class)->realize (widget);
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if (b_view_gtk_alloc_color (GDK_DRAWABLE (widget->window),
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&view->theme->bg_color, &color))
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{
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gdk_window_set_background (widget->window, &color);
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}
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}
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static void
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b_view_gtk_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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BViewGtk *view = B_VIEW_GTK (widget);
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requisition->width = view->theme->width;
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requisition->height = view->theme->height;
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}
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static gboolean
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b_view_gtk_expose_event (GtkWidget *widget,
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GdkEventExpose *event)
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{
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BViewGtk *view = B_VIEW_GTK (widget);
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BTheme *theme = view->theme;
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GdkGC *gc;
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BRectangle rect;
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gint x, y;
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x = (widget->allocation.width - view->theme->width) / 2;
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y = (widget->allocation.height - view->theme->height) / 2;
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gc = widget->style->fg_gc[GTK_STATE_NORMAL];
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gdk_gc_set_clip_rectangle (gc, &event->area);
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if (view->blend)
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{
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rect.x = x;
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rect.y = y;
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rect.w = view->theme->width;
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rect.h = view->theme->height;
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if (b_rectangle_intersect (&rect, (BRectangle *) &event->area, NULL))
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gdk_pixbuf_render_to_drawable (view->pixview->pixbuf,
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widget->window, gc,
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0, 0,
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rect.x, rect.y, rect.w, rect.h,
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GDK_RGB_DITHER_NORMAL,
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- event->area.x, - event->area.y);
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}
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else
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{
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GdkDrawable *drawable;
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GList *list;
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drawable = b_view_gtk_get_drawable (view,
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theme->bg_image, widget->window);
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if (drawable)
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{
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rect.x = x + view->theme->bg_image_x;
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rect.y = y + view->theme->bg_image_y;
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gdk_drawable_get_size (drawable, &rect.w, &rect.h);
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if (b_rectangle_intersect (&rect, (BRectangle *) &event->area, NULL))
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gdk_draw_drawable (GDK_DRAWABLE (widget->window), gc,
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drawable,
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0, 0,
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rect.x, rect.y, rect.w, rect.h);
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}
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for (list = theme->overlays; list; list = list->next)
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{
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BOverlay *overlay = list->data;
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GList *windows;
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GdkColor color;
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drawable = b_view_gtk_get_drawable (view,
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overlay->image, widget->window);
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if (drawable == NULL &&
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b_view_gtk_alloc_color (widget->window, &overlay->color, &color))
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{
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gdk_gc_set_foreground (gc, &color);
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}
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for (windows = overlay->windows; windows; windows = windows->next)
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{
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BWindow *window = windows->data;
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guchar value;
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value = view->frame_data[(window->column +
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window->row * theme->columns)];
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if (!value)
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continue;
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window += (value * theme->maxval) / 256;
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rect.x = window->rect.x + x;
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rect.y = window->rect.y + y;
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rect.w = window->rect.w;
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rect.h = window->rect.h;
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if (b_rectangle_intersect (&rect,
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(BRectangle *) &event->area, NULL))
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{
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if (drawable)
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gdk_draw_drawable (GDK_DRAWABLE (widget->window), gc,
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drawable,
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window->src_x, window->src_y,
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rect.x, rect.y, rect.w, rect.h);
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else
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gdk_draw_rectangle (GDK_DRAWABLE (widget->window), gc,
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TRUE,
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rect.x, rect.y, rect.w, rect.h);
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}
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}
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}
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}
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gdk_gc_set_clip_rectangle (gc, NULL);
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return TRUE;
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}
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/**
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* b_view_gtk_new:
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* @theme: a #BTheme object
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* @error: location to store the error occuring, or %NULL to ignore errors
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*
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* Creates a new widget suitable to display Blinkenlights movies that
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* fit the @theme.
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*
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* Return value: a new widget or %NULL in case of an error
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**/
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GtkWidget *
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b_view_gtk_new (BTheme *theme,
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GError **error)
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{
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BViewGtk *view;
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BViewPixbuf *pixview;
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g_return_val_if_fail (B_IS_THEME (theme), NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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if (theme->channels != 1)
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{
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g_set_error (error, 0, 0, "Channels != 1 is not (yet) supported");
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return NULL;
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}
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pixview = b_view_pixbuf_new_theme (theme, TRUE, error);
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if (! pixview)
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return FALSE;
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view = B_VIEW_GTK (g_object_new (B_TYPE_VIEW_GTK, NULL));
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view->pixview = pixview;
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view->theme = g_object_ref (theme);
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view->blend = theme->needs_blending;
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view->frame_data = g_new0 (guchar, (theme->rows * theme->columns));
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if (view->blend)
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b_view_pixbuf_render (view->pixview, NULL, NULL, NULL);
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return GTK_WIDGET (view);
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}
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/**
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* b_view_gtk_update:
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* @view: a #BViewGtk widget
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* @frame_data: the frame data to display
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*
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* Displays a new frame on the @view. The @view expects @frame_data
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* in the range of 0 to 255.
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**/
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void
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b_view_gtk_update (BViewGtk *view,
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const guchar *frame_data)
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{
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GtkWidget *widget;
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BTheme *theme;
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BRectangle rect;
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g_return_if_fail (B_IS_VIEW_GTK (view));
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g_return_if_fail (B_IS_THEME (view->theme));
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theme = view->theme;
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b_theme_frame_diff_boundary (theme, view->frame_data, frame_data, &rect);
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if (frame_data)
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memcpy (view->frame_data, frame_data, (theme->rows * theme->columns));
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else
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memset (view->frame_data, 0, (theme->rows * theme->columns));
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if (view->blend)
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b_view_pixbuf_render (view->pixview, view->frame_data, &rect, NULL);
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widget = GTK_WIDGET (view);
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rect.x += (widget->allocation.width - view->theme->width) / 2;
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rect.y += (widget->allocation.height - view->theme->height) / 2;
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gtk_widget_queue_draw_area (widget, rect.x, rect.y, rect.w, rect.h);
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}
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static gboolean
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b_view_gtk_alloc_color (GdkDrawable *drawable,
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BColor *color,
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GdkColor *gdk_color)
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{
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gdk_color->red = (color->r << 8) | color->r;
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gdk_color->green = (color->g << 8) | color->g;
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gdk_color->blue = (color->b << 8) | color->b;
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return (gdk_colormap_alloc_color (gdk_drawable_get_colormap (drawable),
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gdk_color, FALSE, TRUE));
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}
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static GdkDrawable *
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b_view_gtk_get_drawable (BViewGtk *view,
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const gchar *filename,
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GdkWindow *window)
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{
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GdkDrawable *drawable;
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const GdkPixbuf *pixbuf;
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if (! filename)
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return NULL;
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drawable = g_hash_table_lookup (view->drawables, filename);
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if (drawable)
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return drawable;
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pixbuf = b_view_pixbuf_load_image (view->pixview, filename, NULL);
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if (pixbuf)
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{
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GdkColormap *colormap = gdk_drawable_get_colormap (window);
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gint width = gdk_pixbuf_get_width (pixbuf);
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gint height = gdk_pixbuf_get_height (pixbuf);
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GdkGC *gc;
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drawable = GDK_DRAWABLE (gdk_pixmap_new (window, width, height,
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gdk_colormap_get_visual (colormap)->depth));
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gdk_drawable_set_colormap (drawable, colormap);
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gc = gdk_gc_new (drawable);
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gdk_draw_pixbuf (drawable, gc,
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||
|
|
(GdkPixbuf *) pixbuf, 0, 0, 0, 0, width, height,
|
||
|
|
GDK_RGB_DITHER_NORMAL, 0, 0);
|
||
|
|
|
||
|
|
g_object_unref (gc);
|
||
|
|
|
||
|
|
g_hash_table_insert (view->drawables, (gpointer) filename, drawable);
|
||
|
|
}
|
||
|
|
|
||
|
|
return drawable;
|
||
|
|
}
|