/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- * vi:set noexpandtab tabstop=8 shiftwidth=8: * * Copyright (C) 2021 Endless OS Foundation LLC * * Authors: * - Philip Withnall * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include "gs-key-colors.h" /* Test program which can be used to check the output and performance of the * gs_calculate_key_colors() function. It is linked against libgnomesoftware, so * will use the function implementation from there. It outputs a HTML page which * lists each icon from the flathub appstream data in your home directory, along * with its extracted key colors and how long extraction took. */ static void print_colours (GString *html_output, GArray *colours) { g_string_append_printf (html_output, ""); for (guint i = 0; i < colours->len; i++) { GdkRGBA *rgba = &g_array_index (colours, GdkRGBA, i); g_string_append_printf (html_output, "", (guint) (rgba->red * 255), (guint) (rgba->green * 255), (guint) (rgba->blue * 255)); if (i % 3 == 2) g_string_append (html_output, ""); } g_string_append_printf (html_output, "

"); } static void print_summary_statistics (GString *html_output, GArray *durations /* (element-type gint64) */) { gint64 sum = 0, min = G_MAXINT64, max = G_MININT64; guint n_measurements = durations->len; gint64 mean, stddev; gint64 sum_of_square_deviations = 0; for (guint i = 0; i < durations->len; i++) { gint64 duration = g_array_index (durations, gint64, i); sum += duration; min = MIN (min, duration); max = MAX (max, duration); } mean = sum / n_measurements; for (guint i = 0; i < durations->len; i++) { gint64 duration = g_array_index (durations, gint64, i); gint64 diff = duration - mean; sum_of_square_deviations += diff * diff; } stddev = sqrt (sum_of_square_deviations / n_measurements); g_string_append_printf (html_output, "[%" G_GINT64_FORMAT ", %" G_GINT64_FORMAT "]μs, mean %" G_GINT64_FORMAT "±%" G_GINT64_FORMAT "μs, n = %u", min, max, mean, stddev, n_measurements); } int main (void) { const gchar *icons_subdir = ".local/share/flatpak/appstream/flathub/x86_64/active/icons/128x128"; g_autofree gchar *icons_dir = g_build_filename (g_get_home_dir (), icons_subdir, NULL); g_autoptr(GDir) dir = NULL; const gchar *entry; g_autoptr(GPtrArray) filenames = g_ptr_array_new_with_free_func (g_free); g_autoptr(GPtrArray) pixbufs = g_ptr_array_new_with_free_func (g_object_unref); g_autoptr(GString) html_output = g_string_new (""); g_autoptr(GArray) durations = g_array_new (FALSE, FALSE, sizeof (gint64)); setlocale (LC_ALL, ""); /* Load pixbufs from the icons directory. */ dir = g_dir_open (icons_dir, 0, NULL); if (dir == NULL) return 1; while ((entry = g_dir_read_name (dir)) != NULL) { g_autofree gchar *filename = g_build_filename (icons_dir, entry, NULL); g_autoptr(GdkPixbuf) pixbuf = gdk_pixbuf_new_from_file (filename, NULL); if (pixbuf == NULL) continue; g_ptr_array_add (filenames, g_steal_pointer (&filename)); g_ptr_array_add (pixbufs, g_steal_pointer (&pixbuf)); } if (!pixbufs->len) return 2; /* Set up an output page */ g_string_append (html_output, "\n" "\n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n"); /* For each pixbuf, run both algorithms. */ for (guint i = 0; i < pixbufs->len; i++) { GdkPixbuf *pixbuf = pixbufs->pdata[i]; const gchar *filename = filenames->pdata[i]; g_autofree gchar *basename = g_path_get_basename (filename); g_autoptr(GArray) colours = NULL; gint64 start_time, duration; g_message ("Processing %u of %u, %s", i + 1, pixbufs->len, filename); start_time = g_get_real_time (); colours = gs_calculate_key_colors (pixbuf); duration = g_get_real_time () - start_time; g_string_append_printf (html_output, "\n" "\n" "\n" "\n" "\n" "\n"); g_array_append_val (durations, duration); } /* Summary statistics for the timings. */ g_string_append (html_output, ""); g_string_append (html_output, "

Filename	Icon	Code duration (μs)	Code colours
%s		%" G_GINT64_FORMAT "	", basename, filename, duration); print_colours (html_output, colours); g_string_append (html_output, "
		"); print_summary_statistics (html_output, durations); g_string_append (html_output, "

"); g_print ("%s\n", html_output->str); return 0; }