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Diffstat (limited to 'savers/floaters.c.orig')
| -rw-r--r-- | savers/floaters.c.orig | 1256 |
1 files changed, 0 insertions, 1256 deletions
diff --git a/savers/floaters.c.orig b/savers/floaters.c.orig deleted file mode 100644 index 1fd84f5..0000000 --- a/savers/floaters.c.orig +++ /dev/null @@ -1,1256 +0,0 @@ -/* - * Copyright (C) 2005 Ray Strode <[email protected]>, - * Matthias Clasen <[email protected]>, - * Søren Sandmann <[email protected]> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - * 02111-1307, USA. - * - * Originally written by: Ray Strode <[email protected]> - * - * Later contributions by: Matthias Clasen <[email protected]> - * Søren Sandmann <[email protected]> - */ - -#include "config.h" - -#include <math.h> -#include <stdlib.h> -#include <sysexits.h> -#include <time.h> - -#include <glib.h> -#include <glib/gi18n.h> - -#include <gdk/gdk.h> -#include <gdk/gdkx.h> - -#include <gtk/gtk.h> - -#include "gs-theme-window.h" - -#ifndef trunc -#define trunc(x) (((x) > 0.0) ? floor((x)) : -floor(-(x))) -#endif - -#ifndef OPTIMAL_FRAME_RATE -#define OPTIMAL_FRAME_RATE (25.0) -#endif - -#ifndef STAT_PRINT_FREQUENCY -#define STAT_PRINT_FREQUENCY (2000) -#endif - -#ifndef FLOATER_MAX_SIZE -#define FLOATER_MAX_SIZE (128.0) -#endif - -#ifndef FLOATER_MIN_SIZE -#define FLOATER_MIN_SIZE (16.0) -#endif -#ifndef FLOATER_DEFAULT_COUNT -#define FLOATER_DEFAULT_COUNT (5) -#endif - -#ifndef SMALL_ANGLE -#define SMALL_ANGLE (0.025 * G_PI) -#endif - -#ifndef BIG_ANGLE -#define BIG_ANGLE (0.125 * G_PI) -#endif - -#ifndef GAMMA -#define GAMMA 2.2 -#endif - -static gboolean should_show_paths = FALSE; -static gboolean should_do_rotations = FALSE; -static gboolean should_print_stats = FALSE; -static gint max_floater_count = FLOATER_DEFAULT_COUNT; -static gchar *geometry = NULL; -static gchar **filenames = NULL; - -static GOptionEntry options[] = { - {"show-paths", 'p', 0, G_OPTION_ARG_NONE, &should_show_paths, - N_("Show paths that images follow"), NULL}, - - {"do-rotations", 'r', 0, G_OPTION_ARG_NONE, &should_do_rotations, - N_("Occasionally rotate images as they move"), NULL}, - - {"print-stats", 's', 0, G_OPTION_ARG_NONE, &should_print_stats, - N_("Print out frame rate and other statistics"), NULL}, - - {"number-of-images", 'n', 0, G_OPTION_ARG_INT, &max_floater_count, - N_("The maximum number of images to keep on screen"), N_("MAX_IMAGES")}, - - {"geometry", 0, 0, G_OPTION_ARG_STRING, &geometry, - N_("The initial size and position of window"), N_("WIDTHxHEIGHT+X+Y")}, - - {G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, - N_("The source image to use"), NULL}, - - {NULL} -}; - - -typedef struct _Point Point; -typedef struct _Path Path; -typedef struct _Rectangle Rectangle; -typedef struct _ScreenSaverFloater ScreenSaverFloater; -typedef struct _CachedSource CachedSource; -typedef struct _ScreenSaver ScreenSaver; - -struct _Point -{ - gdouble x, y; -}; - -struct _Path -{ - Point start_point; - Point start_control_point; - Point end_control_point; - Point end_point; - - gdouble x_linear_coefficient, - y_linear_coefficient; - - gdouble x_quadratic_coefficient, - y_quadratic_coefficient; - - gdouble x_cubic_coefficient, - y_cubic_coefficient; - - gdouble duration; -}; - -struct _CachedSource -{ - cairo_pattern_t *pattern; - gint width, height; -}; - -struct _Rectangle -{ - Point top_left_point; - Point bottom_right_point; -}; - -struct _ScreenSaverFloater -{ - GdkRectangle bounds; - - Point start_position; - Point position; - - gdouble scale; - gdouble opacity; - - Path *path; - gdouble path_start_time; - gdouble path_start_scale; - gdouble path_end_scale; - - gdouble angle; - gdouble angle_increment; -}; - -struct _ScreenSaver -{ - GtkWidget *drawing_area; - Rectangle canvas_rectangle; - GHashTable *cached_sources; - - char *filename; - - gdouble first_update_time; - - gdouble last_calculated_stats_time, - current_calculated_stats_time; - gint update_count, frame_count; - - gdouble updates_per_second; - gdouble frames_per_second; - - guint state_update_timeout_id; - guint stats_update_timeout_id; - - GList *floaters; - gint max_floater_count; - - guint should_do_rotations: 1; - guint should_show_paths : 1; - guint draw_ops_pending : 1; -}; - -static Path *path_new (Point *start_point, - Point *start_control_point, - Point *end_control_point, - Point *end_point, - gdouble duration); -static void path_free (Path *path); - -static ScreenSaverFloater *screen_saver_floater_new (ScreenSaver *screen_saver, - Point *position, - gdouble scale); -static void screen_saver_floater_free (ScreenSaver *screen_saver, - ScreenSaverFloater *floater); -static gboolean screen_saver_floater_is_off_canvas (ScreenSaver *screen_saver, - ScreenSaverFloater *floater); -static gboolean screen_saver_floater_should_bubble_up (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble performance_ratio, - gdouble *duration); -static gboolean screen_saver_floater_should_come_on_screen (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble performance_ratio, - gdouble *duration); -static Point screen_saver_floater_get_position_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time); -static gdouble screen_saver_floater_get_scale_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time); -static gdouble screen_saver_floater_get_angle_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time); - -static Path *screen_saver_floater_create_path_to_on_screen (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration); -static Path *screen_saver_floater_create_path_to_bubble_up (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration); -static Path *screen_saver_floater_create_path_to_random_point (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration); -static Path *screen_saver_floater_create_path (ScreenSaver *screen_saver, - ScreenSaverFloater *floater); -static void screen_saver_floater_update_state (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time); - -static gboolean screen_saver_floater_do_draw (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - cairo_t *context); - -static CachedSource *cached_source_new (cairo_pattern_t *pattern, - gint width, - gint height); -static void cached_source_free (CachedSource *source); - -static ScreenSaver *screen_saver_new (GtkDrawingArea *drawing_area, - const gchar *filename, - gint max_floater_count, - gboolean should_do_rotations, - gboolean should_show_paths); -static void screen_saver_free (ScreenSaver *screen_saver); -static gdouble screen_saver_get_timestamp (ScreenSaver *screen_saver); -static void screen_saver_get_initial_state (ScreenSaver *screen_saver); -static void screen_saver_update_state (ScreenSaver *screen_saver, - gdouble time); -static gboolean screen_saver_do_update_state (ScreenSaver *screen_saver); -static gboolean screen_saver_do_update_stats (ScreenSaver *screen_saver); -static gdouble screen_saver_get_updates_per_second (ScreenSaver *screen_saver); -static gdouble screen_saver_get_frames_per_second (ScreenSaver *screen_saver); -static gdouble screen_saver_get_image_cache_usage (ScreenSaver *screen_saver); -static void screen_saver_create_floaters (ScreenSaver *screen_saver); -static void screen_saver_destroy_floaters (ScreenSaver *screen_saver); -static void screen_saver_on_size_allocate (ScreenSaver *screen_saver, - GtkAllocation *allocation); -static void screen_saver_on_expose_event (ScreenSaver *screen_saver, - GdkEventExpose *event); -static gboolean do_print_screen_saver_stats (ScreenSaver *screen_saver); -static GdkPixbuf *gamma_correct (const GdkPixbuf *input_pixbuf); - -static CachedSource* -cached_source_new (cairo_pattern_t *pattern, - gint width, - gint height) -{ - CachedSource *source; - - source = g_new (CachedSource, 1); - source->pattern = cairo_pattern_reference (pattern); - source->width = width; - source->height = height; - - return source; -} - -static void -cached_source_free (CachedSource *source) -{ - if (source == NULL) - return; - - cairo_pattern_destroy (source->pattern); - - g_free (source); -} - -static Path * -path_new (Point *start_point, - Point *start_control_point, - Point *end_control_point, - Point *end_point, - gdouble duration) -{ - Path *path; - - path = g_new (Path, 1); - path->start_point = *start_point; - path->start_control_point = *start_control_point; - path->end_control_point = *end_control_point; - path->end_point = *end_point; - path->duration = duration; - - /* we precompute the coefficients to the cubic bezier curve here - * so that we don't have to do it repeatedly later The equation is: - * - * B(t) = A * t^3 + B * t^2 + C * t + start_point - */ - path->x_linear_coefficient = 3 * (start_control_point->x - start_point->x); - path->x_quadratic_coefficient = 3 * (end_control_point->x - - start_control_point->x) - - path->x_linear_coefficient; - path->x_cubic_coefficient = end_point->x - start_point->x - - path->x_linear_coefficient - - path->x_quadratic_coefficient; - - path->y_linear_coefficient = 3 * (start_control_point->y - start_point->y); - path->y_quadratic_coefficient = 3 * (end_control_point->y - - start_control_point->y) - - path->y_linear_coefficient; - path->y_cubic_coefficient = end_point->y - start_point->y - - path->y_linear_coefficient - - path->y_quadratic_coefficient; - return path; -} - -static void -path_free (Path *path) -{ - g_free (path); -} - -static ScreenSaverFloater* -screen_saver_floater_new (ScreenSaver *screen_saver, - Point *position, - gdouble scale) -{ - ScreenSaverFloater *floater; - - floater = g_new (ScreenSaverFloater, 1); - floater->bounds.width = 0; - floater->start_position = *position; - floater->position = *position; - floater->scale = scale; - floater->opacity = pow (scale, 1.0 / GAMMA); - floater->path = NULL; - floater->path_start_time = 0.0; - floater->path_start_scale = 1.0; - floater->path_end_scale = 0.0; - - floater->angle = 0.0; - floater->angle_increment = 0.0; - - return floater; -} - -void -screen_saver_floater_free (ScreenSaver *screen_saver, - ScreenSaverFloater *floater) -{ - if (floater == NULL) - return; - - path_free (floater->path); - - g_free (floater); -} - -static gboolean -screen_saver_floater_is_off_canvas (ScreenSaver *screen_saver, - ScreenSaverFloater *floater) -{ - if ((floater->position.x < screen_saver->canvas_rectangle.top_left_point.x) || - (floater->position.x > screen_saver->canvas_rectangle.bottom_right_point.x) || - (floater->position.y < screen_saver->canvas_rectangle.top_left_point.y) || - (floater->position.y > screen_saver->canvas_rectangle.bottom_right_point.y)) - return TRUE; - - return FALSE; -} - -static gboolean -screen_saver_floater_should_come_on_screen (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble performance_ratio, - gdouble *duration) -{ - - if (!screen_saver_floater_is_off_canvas (screen_saver, floater)) - return FALSE; - - if ((abs (performance_ratio - .5) >= G_MINDOUBLE) && - (g_random_double () > .5)) - { - if (duration) - *duration = g_random_double_range (3.0, 7.0); - - return TRUE; - } - - return FALSE; -} - -static gboolean -screen_saver_floater_should_bubble_up (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble performance_ratio, - gdouble *duration) -{ - - if ((performance_ratio < .5) && (g_random_double () > .5)) - { - if (duration) - *duration = performance_ratio * 30.0; - - return TRUE; - } - - if ((floater->scale < .3) && (g_random_double () > .6)) - { - if (duration) - *duration = 30.0; - - return TRUE; - } - - return FALSE; -} - -static Point -screen_saver_floater_get_position_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time) -{ - Point point; - - time = time / floater->path->duration; - - point.x = floater->path->x_cubic_coefficient * (time * time * time) + - floater->path->x_quadratic_coefficient * (time * time) + - floater->path->x_linear_coefficient * (time) + - floater->path->start_point.x; - point.y = floater->path->y_cubic_coefficient * (time * time * time) + - floater->path->y_quadratic_coefficient * (time * time) + - floater->path->y_linear_coefficient * (time) + - floater->path->start_point.y; - - return point; -} - -static gdouble -screen_saver_floater_get_scale_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time) -{ - gdouble completion_ratio, total_scale_growth, new_scale; - - completion_ratio = time / floater->path->duration; - total_scale_growth = (floater->path_end_scale - floater->path_start_scale); - new_scale = floater->path_start_scale + total_scale_growth * completion_ratio; - - return CLAMP (new_scale, 0.0, 1.0); -} - -static gdouble -screen_saver_floater_get_angle_from_time (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time) -{ - gdouble completion_ratio; - gdouble total_rotation; - - completion_ratio = time / floater->path->duration; - total_rotation = floater->angle_increment * floater->path->duration; - - return floater->angle + total_rotation * completion_ratio; -} - -static Path * -screen_saver_floater_create_path_to_on_screen (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration) -{ - Point start_position, end_position, start_control_point, end_control_point; - start_position = floater->position; - - end_position.x = g_random_double_range (.25, .75) * - (screen_saver->canvas_rectangle.top_left_point.x + - screen_saver->canvas_rectangle.bottom_right_point.x); - end_position.y = g_random_double_range (.25, .75) * - (screen_saver->canvas_rectangle.top_left_point.y + - screen_saver->canvas_rectangle.bottom_right_point.y); - - start_control_point.x = start_position.x + .9 * (end_position.x - start_position.x); - start_control_point.y = start_position.y + .9 * (end_position.y - start_position.y); - - end_control_point.x = start_position.x + 1.0 * (end_position.x - start_position.x); - end_control_point.y = start_position.y + 1.0 * (end_position.y - start_position.y); - - return path_new (&start_position, &start_control_point, &end_control_point, - &end_position, duration); -} - -static Path * -screen_saver_floater_create_path_to_bubble_up (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration) -{ - Point start_position, end_position, start_control_point, end_control_point; - - start_position = floater->position; - end_position.x = start_position.x; - end_position.y = screen_saver->canvas_rectangle.top_left_point.y - FLOATER_MAX_SIZE; - start_control_point.x = .5 * start_position.x; - start_control_point.y = .5 * start_position.y; - end_control_point.x = 1.5 * end_position.x; - end_control_point.y = .5 * end_position.y; - - return path_new (&start_position, &start_control_point, &end_control_point, - &end_position, duration); -} - -static Path * -screen_saver_floater_create_path_to_random_point (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble duration) -{ - Point start_position, end_position, start_control_point, end_control_point; - - start_position = floater->position; - - end_position.x = start_position.x + - (g_random_double_range (-.5, .5) * 4 * FLOATER_MAX_SIZE); - end_position.y = start_position.y + - (g_random_double_range (-.5, .5) * 4 * FLOATER_MAX_SIZE); - - start_control_point.x = start_position.x + .95 * (end_position.x - start_position.x); - start_control_point.y = start_position.y + .95 * (end_position.y - start_position.y); - - end_control_point.x = start_position.x + 1.0 * (end_position.x - start_position.x); - end_control_point.y = start_position.y + 1.0 * (end_position.y - start_position.y); - - return path_new (&start_position, &start_control_point, &end_control_point, - &end_position, duration); -} - -static Path * -screen_saver_floater_create_path (ScreenSaver *screen_saver, - ScreenSaverFloater *floater) -{ - gdouble performance_ratio; - gdouble duration; - - performance_ratio = - screen_saver_get_frames_per_second (screen_saver) / OPTIMAL_FRAME_RATE; - - if (abs (performance_ratio) <= G_MINDOUBLE) - performance_ratio = 1.0; - - if (screen_saver_floater_should_bubble_up (screen_saver, floater, performance_ratio, &duration)) - return screen_saver_floater_create_path_to_bubble_up (screen_saver, floater, duration); - - if (screen_saver_floater_should_come_on_screen (screen_saver, floater, performance_ratio, &duration)) - return screen_saver_floater_create_path_to_on_screen (screen_saver, floater, duration); - - return screen_saver_floater_create_path_to_random_point (screen_saver, floater, - g_random_double_range (3.0, 7.0)); -} - -static void -screen_saver_floater_update_state (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - gdouble time) -{ - gdouble performance_ratio; - - performance_ratio = - screen_saver_get_frames_per_second (screen_saver) / OPTIMAL_FRAME_RATE; - - if (floater->path == NULL) - { - floater->path = screen_saver_floater_create_path (screen_saver, floater); - floater->path_start_time = time; - - floater->path_start_scale = floater->scale; - - if (g_random_double () > .5) - floater->path_end_scale = g_random_double_range (0.10, performance_ratio); - - /* poor man's distribution */ - if (screen_saver->should_do_rotations && - (g_random_double () < .75 * performance_ratio)) - { - gint r; - - r = g_random_int_range (0, 100); - if (r < 80) - floater->angle_increment = 0.0; - else if (r < 95) - floater->angle_increment = g_random_double_range (-SMALL_ANGLE, SMALL_ANGLE); - else - floater->angle_increment = g_random_double_range (-BIG_ANGLE, BIG_ANGLE); - } - } - - if (time < (floater->path_start_time + floater->path->duration)) - { - gdouble path_time; - - path_time = time - floater->path_start_time; - - floater->position = - screen_saver_floater_get_position_from_time (screen_saver, floater, - path_time); - floater->scale = - screen_saver_floater_get_scale_from_time (screen_saver, floater, path_time); - - floater->angle = - screen_saver_floater_get_angle_from_time (screen_saver, floater, path_time); - - floater->opacity = pow (floater->scale, 1.0 / GAMMA); - } - else - { - path_free (floater->path); - - floater->path = NULL; - floater->path_start_time = 0.0; - } -} - -static GdkPixbuf * -gamma_correct (const GdkPixbuf *input_pixbuf) -{ - gint x, y, width, height, rowstride; - GdkPixbuf *output_pixbuf; - guchar *pixels; - - output_pixbuf = gdk_pixbuf_copy (input_pixbuf); - pixels = gdk_pixbuf_get_pixels (output_pixbuf); - - width = gdk_pixbuf_get_width (output_pixbuf); - height = gdk_pixbuf_get_height (output_pixbuf); - rowstride = gdk_pixbuf_get_rowstride (output_pixbuf); - - for (y = 0; y < height; y++) - for (x = 0; x < width; x++) - { - guchar *alpha_channel; - guchar opacity; - - alpha_channel = pixels + y * (rowstride / 4) + x + 3; - opacity = (guchar) (255 * pow ((*alpha_channel / 255.0), 1.0 / GAMMA)); - - *alpha_channel = opacity; - } - - return output_pixbuf; -} - -static gboolean -screen_saver_floater_do_draw (ScreenSaver *screen_saver, - ScreenSaverFloater *floater, - cairo_t *context) -{ - gint size; - CachedSource *source; - - size = CLAMP ((int) (FLOATER_MAX_SIZE * floater->scale), - FLOATER_MIN_SIZE, FLOATER_MAX_SIZE); - - source = g_hash_table_lookup (screen_saver->cached_sources, GINT_TO_POINTER (size)); - - if (source == NULL) - { - GdkPixbuf *pixbuf; - GError *error; - - pixbuf = NULL; - error = NULL; - - pixbuf = gdk_pixbuf_new_from_file_at_size (screen_saver->filename, size, -1, - &error); - if (pixbuf == NULL) - { - g_assert (error != NULL); - g_printerr ("%s", _(error->message)); - g_error_free (error); - return FALSE; - } - - if (gdk_pixbuf_get_has_alpha (pixbuf)) - gamma_correct (pixbuf); - - gdk_cairo_set_source_pixbuf (context, pixbuf, 0.0, 0.0); - - source = cached_source_new (cairo_get_source (context), - gdk_pixbuf_get_width (pixbuf), - gdk_pixbuf_get_height (pixbuf)); - g_object_unref (pixbuf); - g_hash_table_insert (screen_saver->cached_sources, GINT_TO_POINTER (size), - source); - } - - cairo_save (context); - - if (screen_saver->should_do_rotations && (abs (floater->angle) > G_MINDOUBLE)) - { - floater->bounds.width = G_SQRT2 * source->width + 2; - floater->bounds.height = G_SQRT2 * source->height + 2; - floater->bounds.x = (int) (floater->position.x - .5 * G_SQRT2 * source->width) - 1; - floater->bounds.y = (int) (floater->position.y - .5 * G_SQRT2 * source->height) - 1; - - cairo_translate (context, - trunc (floater->position.x), - trunc (floater->position.y)); - cairo_rotate (context, floater->angle); - cairo_translate (context, - -trunc (floater->position.x), - -trunc (floater->position.y)); - } - else - { - floater->bounds.width = source->width + 2; - floater->bounds.height = source->height + 2; - floater->bounds.x = (int) (floater->position.x - .5 * source->width) - 1; - floater->bounds.y = (int) (floater->position.y - .5 * source->height) - 1; - } - - cairo_translate (context, - trunc (floater->position.x - .5 * source->width), - trunc (floater->position.y - .5 * source->height)); - - cairo_set_source (context, source->pattern); - - cairo_rectangle (context, - trunc (.5 * (source->width - floater->bounds.width)), - trunc (.5 * (source->height - floater->bounds.height)), - floater->bounds.width, floater->bounds.height); - - cairo_clip (context); - cairo_paint_with_alpha (context, floater->opacity); - cairo_restore (context); - - if (screen_saver->should_show_paths && (floater->path != NULL)) - { - gdouble dash_pattern[] = { 5.0 }; - gint size; - - size = CLAMP ((int) (FLOATER_MAX_SIZE * floater->path_start_scale), - FLOATER_MIN_SIZE, FLOATER_MAX_SIZE); - - cairo_save (context); - cairo_set_source_rgba (context, 1.0, 1.0, 1.0, .2 * floater->opacity); - cairo_move_to (context, - floater->path->start_point.x, - floater->path->start_point.y); - cairo_curve_to (context, - floater->path->start_control_point.x, - floater->path->start_control_point.y, - floater->path->end_control_point.x, - floater->path->end_control_point.y, - floater->path->end_point.x, - floater->path->end_point.y); - cairo_set_line_cap (context, CAIRO_LINE_CAP_ROUND); - cairo_stroke (context); - cairo_set_source_rgba (context, 1.0, 0.0, 0.0, .5 * floater->opacity); - cairo_rectangle (context, - floater->path->start_point.x - 3, - floater->path->start_point.y - 3, - 6, 6); - cairo_fill (context); - cairo_set_source_rgba (context, 0.0, 0.5, 0.0, .5 * floater->opacity); - cairo_arc (context, - floater->path->start_control_point.x, - floater->path->start_control_point.y, - 3, 0.0, 2.0 * G_PI); - cairo_stroke (context); - cairo_set_source_rgba (context, 0.5, 0.0, 0.5, .5 * floater->opacity); - cairo_arc (context, - floater->path->end_control_point.x, - floater->path->end_control_point.y, - 3, 0.0, 2.0 * G_PI); - cairo_stroke (context); - cairo_set_source_rgba (context, 0.0, 0.0, 1.0, .5 * floater->opacity); - cairo_rectangle (context, - floater->path->end_point.x - 3, - floater->path->end_point.y - 3, - 6, 6); - cairo_fill (context); - - cairo_set_dash (context, dash_pattern, G_N_ELEMENTS (dash_pattern), 0); - cairo_set_source_rgba (context, .5, .5, .5, .2 * floater->scale); - cairo_move_to (context, floater->path->start_point.x, - floater->path->start_point.y); - cairo_line_to (context, floater->path->start_control_point.x, - floater->path->start_control_point.y); - cairo_stroke (context); - - cairo_move_to (context, floater->path->end_point.x, - floater->path->end_point.y); - cairo_line_to (context, floater->path->end_control_point.x, - floater->path->end_control_point.y); - cairo_stroke (context); - - cairo_restore (context); - } - - return TRUE; -} - -static ScreenSaver * -screen_saver_new (GtkDrawingArea *drawing_area, - const gchar *filename, - gint max_floater_count, - gboolean should_do_rotations, - gboolean should_show_paths) -{ - ScreenSaver *screen_saver; - - screen_saver = g_new (ScreenSaver, 1); - screen_saver->filename = g_strdup (filename); - screen_saver->drawing_area = GTK_WIDGET (drawing_area); - screen_saver->cached_sources = - g_hash_table_new_full (NULL, NULL, NULL, - (GDestroyNotify) cached_source_free); - - g_signal_connect_swapped (G_OBJECT (drawing_area), "size-allocate", - G_CALLBACK (screen_saver_on_size_allocate), - screen_saver); - - g_signal_connect_swapped (G_OBJECT (drawing_area), "expose-event", - G_CALLBACK (screen_saver_on_expose_event), - screen_saver); - - screen_saver->first_update_time = 0.0; - screen_saver->current_calculated_stats_time = 0.0; - screen_saver->last_calculated_stats_time = 0.0; - screen_saver->update_count = 0; - screen_saver->frame_count = 0; - screen_saver->updates_per_second = 0.0; - screen_saver->frames_per_second = 0.0; - screen_saver->floaters = NULL; - screen_saver->max_floater_count = max_floater_count; - - screen_saver->should_show_paths = should_show_paths; - screen_saver->should_do_rotations = should_do_rotations; - - screen_saver_get_initial_state (screen_saver); - - screen_saver->state_update_timeout_id = - g_timeout_add (1000 / (2.0 * OPTIMAL_FRAME_RATE), - (GSourceFunc) screen_saver_do_update_state, screen_saver); - - screen_saver->stats_update_timeout_id = - g_timeout_add (1000, (GSourceFunc) screen_saver_do_update_stats, - screen_saver); - - return screen_saver; -} - -static void -screen_saver_free (ScreenSaver *screen_saver) -{ - if (screen_saver == NULL) - return; - - g_free (screen_saver->filename); - - g_hash_table_destroy (screen_saver->cached_sources); - - if (screen_saver->state_update_timeout_id != 0) - g_source_remove (screen_saver->state_update_timeout_id); - - if (screen_saver->stats_update_timeout_id != 0) - g_source_remove (screen_saver->stats_update_timeout_id); - - screen_saver_destroy_floaters (screen_saver); - - g_free (screen_saver); -} - -static gdouble -screen_saver_get_timestamp (ScreenSaver *screen_saver) -{ - const gdouble microseconds_per_second = (gdouble ) G_USEC_PER_SEC; - gdouble timestamp; - GTimeVal now = { 0L, /* zero-filled */ }; - - g_get_current_time (&now); - timestamp = ((microseconds_per_second * now.tv_sec) + now.tv_usec) / - microseconds_per_second; - - return timestamp; -} - -static void -screen_saver_create_floaters (ScreenSaver *screen_saver) -{ - gint i; - - for (i = 0; i < screen_saver->max_floater_count; i++) - { - ScreenSaverFloater *floater; - Point position; - gdouble scale; - - position.x = g_random_double_range (screen_saver->canvas_rectangle.top_left_point.x, - screen_saver->canvas_rectangle.bottom_right_point.x); - position.y = g_random_double_range (screen_saver->canvas_rectangle.top_left_point.y, - screen_saver->canvas_rectangle.bottom_right_point.y); - - scale = g_random_double (); - - floater = screen_saver_floater_new (screen_saver, &position, scale); - - screen_saver->floaters = g_list_prepend (screen_saver->floaters, - floater); - } -} - -static gdouble -screen_saver_get_updates_per_second (ScreenSaver *screen_saver) -{ - return screen_saver->updates_per_second; -} - -static gdouble -screen_saver_get_frames_per_second (ScreenSaver *screen_saver) -{ - return screen_saver->frames_per_second; -} - -static gdouble -screen_saver_get_image_cache_usage (ScreenSaver *screen_saver) -{ - static const gdouble cache_capacity = (FLOATER_MAX_SIZE - FLOATER_MIN_SIZE + 1); - - return g_hash_table_size (screen_saver->cached_sources) / cache_capacity; -} - -static void -screen_saver_destroy_floaters (ScreenSaver *screen_saver) -{ - if (screen_saver->floaters == NULL) - return; - - g_list_foreach (screen_saver->floaters, (GFunc) screen_saver_floater_free, - NULL); - g_list_free (screen_saver->floaters); - - screen_saver->floaters = NULL; -} - -static void -screen_saver_on_size_allocate (ScreenSaver *screen_saver, - GtkAllocation *allocation) -{ - Rectangle canvas_rectangle; - - canvas_rectangle.top_left_point.x = allocation->x - .1 * allocation->width; - canvas_rectangle.top_left_point.y = allocation->y - .1 * allocation->height; - - canvas_rectangle.bottom_right_point.x = allocation->x + (1.1 * allocation->width); - canvas_rectangle.bottom_right_point.y = allocation->y + (1.1 * allocation->height); - - screen_saver->canvas_rectangle = canvas_rectangle; -} - -static gint -compare_floaters (ScreenSaverFloater *a, - ScreenSaverFloater *b) -{ - if (a->scale > b->scale) - return 1; - else if (abs (a->scale - b->scale) <= G_MINDOUBLE) - return 0; - else - return -1; -} - -static void -screen_saver_on_expose_event (ScreenSaver *screen_saver, - GdkEventExpose *event) -{ - GList *tmp; - cairo_t *context; - - if (screen_saver->floaters == NULL) - screen_saver_create_floaters (screen_saver); - - context = gdk_cairo_create (screen_saver->drawing_area->window); - - cairo_rectangle (context, - (double) event->area.x, - (double) event->area.y, - (double) event->area.width, - (double) event->area.height); - cairo_clip (context); - - screen_saver->floaters = g_list_sort (screen_saver->floaters, - (GCompareFunc)compare_floaters); - - for (tmp = screen_saver->floaters; tmp != NULL; tmp = tmp->next) - { - ScreenSaverFloater *floater; - GdkRectangle rect; - gint size; - - floater = (ScreenSaverFloater *) tmp->data; - - size = CLAMP ((int) (FLOATER_MAX_SIZE * floater->scale), - FLOATER_MIN_SIZE, FLOATER_MAX_SIZE); - - rect.x = (int) (floater->position.x - .5 * G_SQRT2 * size); - rect.y = (int) (floater->position.y - .5 * G_SQRT2 * size); - rect.width = G_SQRT2 * size; - rect.height = G_SQRT2 * size; - - if (!gdk_region_rect_in (event->region, &rect)) - continue; - - if (!screen_saver_floater_do_draw (screen_saver, floater, context)) - { - gtk_main_quit (); - break; - } - } - - cairo_destroy (context); - - screen_saver->draw_ops_pending = TRUE; - screen_saver->frame_count++; -} - -static void -screen_saver_update_state (ScreenSaver *screen_saver, - gdouble time) -{ - GList *tmp; - - tmp = screen_saver->floaters; - while (tmp != NULL) - { - ScreenSaverFloater *floater; - floater = (ScreenSaverFloater *) tmp->data; - - screen_saver_floater_update_state (screen_saver, floater, time); - - if (GTK_WIDGET_REALIZED (screen_saver->drawing_area) - && (floater->bounds.width > 0) && (floater->bounds.height > 0)) - { - gint size; - size = CLAMP ((int) (FLOATER_MAX_SIZE * floater->scale), - FLOATER_MIN_SIZE, FLOATER_MAX_SIZE); - - gtk_widget_queue_draw_area (screen_saver->drawing_area, - floater->bounds.x, - floater->bounds.y, - floater->bounds.width, - floater->bounds.height); - - /* the edges could concievably be spread across two - * pixels so we add +2 to invalidated region - */ - if (screen_saver->should_do_rotations) - gtk_widget_queue_draw_area (screen_saver->drawing_area, - (int) (floater->position.x - - .5 * G_SQRT2 * size), - (int) (floater->position.y - - .5 * G_SQRT2 * size), - G_SQRT2 * size + 2, - G_SQRT2 * size + 2); - else - gtk_widget_queue_draw_area (screen_saver->drawing_area, - (int) (floater->position.x - - .5 * size), - (int) (floater->position.y - - .5 * size), - size + 2, size + 2); - - if (screen_saver->should_show_paths) - gtk_widget_queue_draw (screen_saver->drawing_area); - } - - tmp = tmp->next; - } -} - -static void -screen_saver_get_initial_state (ScreenSaver *screen_saver) -{ - screen_saver->first_update_time = screen_saver_get_timestamp (screen_saver); - screen_saver_update_state (screen_saver, 0.0); -} - -static gboolean -screen_saver_do_update_state (ScreenSaver *screen_saver) -{ - gdouble current_update_time; - - /* flush pending requests to the X server and block for - * replies before proceeding to help prevent the X server from - * getting overrun with requests - */ - if (screen_saver->draw_ops_pending) - { - gdk_flush (); - screen_saver->draw_ops_pending = FALSE; - } - - current_update_time = screen_saver_get_timestamp (screen_saver); - screen_saver_update_state (screen_saver, current_update_time - - screen_saver->first_update_time); - screen_saver->update_count++; - return TRUE; -} - -static gboolean -screen_saver_do_update_stats (ScreenSaver *screen_saver) -{ - gdouble last_calculated_stats_time, seconds_since_last_stats_update; - - last_calculated_stats_time = screen_saver->current_calculated_stats_time; - screen_saver->current_calculated_stats_time = - screen_saver_get_timestamp (screen_saver); - screen_saver->last_calculated_stats_time = last_calculated_stats_time; - - if (abs (last_calculated_stats_time) <= G_MINDOUBLE) - return TRUE; - - seconds_since_last_stats_update = - screen_saver->current_calculated_stats_time - last_calculated_stats_time; - - screen_saver->updates_per_second = - screen_saver->update_count / seconds_since_last_stats_update; - screen_saver->frames_per_second = - screen_saver->frame_count / seconds_since_last_stats_update; - - screen_saver->update_count = 0; - screen_saver->frame_count = 0; - - return TRUE; -} - -static gboolean -do_print_screen_saver_stats (ScreenSaver *screen_saver) -{ - - g_print ("updates per second: %.2f, frames per second: %.2f, " - "image cache %.0f%% full\n", - screen_saver_get_updates_per_second (screen_saver), - screen_saver_get_frames_per_second (screen_saver), - screen_saver_get_image_cache_usage (screen_saver) * 100.0); - - return TRUE; -} - -int -main (int argc, - char *argv[]) -{ - ScreenSaver *screen_saver; - GtkWidget *window; - GtkWidget *drawing_area; - - GtkStateType state; - - GError *error; - - error = NULL; - - bindtextdomain (GETTEXT_PACKAGE, MATELOCALEDIR); - bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); - textdomain (GETTEXT_PACKAGE); - - gtk_init_with_args (&argc, &argv, - /* translators: the word "image" here - * represents a command line argument - */ - _("image - floats images around the screen"), - options, GETTEXT_PACKAGE, &error); - - - if (error != NULL) - { - g_printerr (_("%s. See --help for usage information.\n"), - _(error->message)); - g_error_free (error); - return EX_SOFTWARE; - } - - if ((filenames == NULL) || (filenames[0] == NULL) || - (filenames[1] != NULL)) - { - g_printerr (_("You must specify one image. See --help for usage " - "information.\n")); - return EX_USAGE; - } - - window = gs_theme_window_new (); - - g_signal_connect (G_OBJECT (window), "delete-event", - G_CALLBACK (gtk_main_quit), NULL); - - drawing_area = gtk_drawing_area_new (); - - state = (GtkStateType) 0; - while (state < (GtkStateType) G_N_ELEMENTS (drawing_area->style->bg)) - { - gtk_widget_modify_bg (drawing_area, state, &drawing_area->style->mid[state]); - state++; - } - - gtk_widget_show (drawing_area); - gtk_container_add (GTK_CONTAINER (window), drawing_area); - - screen_saver = screen_saver_new (GTK_DRAWING_AREA (drawing_area), - filenames[0], max_floater_count, - should_do_rotations, should_show_paths); - g_strfreev (filenames); - - if (should_print_stats) - g_timeout_add (STAT_PRINT_FREQUENCY, - (GSourceFunc) do_print_screen_saver_stats, - screen_saver); - - if ((geometry == NULL) - || !gtk_window_parse_geometry (GTK_WINDOW (window), geometry)) - gtk_window_set_default_size (GTK_WINDOW (window), 640, 480); - - gtk_widget_show (window); - - gtk_main (); - - screen_saver_free (screen_saver); - - return EX_OK; -} |