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PIKApp
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PIKApp/app/gui/splash.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <gegl.h>
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_WAYLAND
#include <gdk/gdkwayland.h>
#endif
#ifdef G_OS_WIN32
#include <windef.h>
#include <winbase.h>
#include <windows.h>
#endif
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "libpikacolor/pikacolor.h"
#include "libpikawidgets/pikawidgets.h"
#include "gui-types.h"
#include "core/pika.h"
#include "widgets/pikawidgets-utils.h"
#include "splash.h"
#include "pika-intl.h"
#define MEASURE_UPPER "1235678901234567890"
#define MEASURE_LOWER "12356789012345678901234567890"
typedef struct
{
GtkWidget *window;
GtkWidget *area;
gint width;
gint height;
GtkWidget *progress;
GdkRGBA color;
PangoLayout *upper;
gint upper_x;
gint upper_y;
PangoLayout *lower;
gint lower_x;
gint lower_y;
gdouble percentage;
gchar *text1;
gchar *text2;
/* debug timer */
GTimer *timer;
gdouble last_time;
} PikaSplash;
static PikaSplash *splash = NULL;
static void splash_position_layouts (PikaSplash *splash,
const gchar *text1,
const gchar *text2,
GdkRectangle *area);
static gboolean splash_area_draw (GtkWidget *widget,
cairo_t *cr,
PikaSplash *splash);
static void splash_rectangle_union (GdkRectangle *dest,
PangoRectangle *pango_rect,
gint offset_x,
gint offset_y);
static void splash_average_text_area (PikaSplash *splash,
GdkPixbuf *pixbuf,
GdkRGBA *rgba);
static GdkPixbufAnimation *
splash_image_load (Pika *pika,
gint max_width,
gint max_height,
gboolean be_verbose);
static GdkPixbufAnimation *
splash_image_load_from_file (GFile *file,
gint max_width,
gint max_height,
gboolean be_verbose);
static GdkPixbufAnimation *
splash_image_pick_from_dirs (GList *dirs,
gint max_width,
gint max_height,
gboolean be_verbose);
static void splash_timer_elapsed (void);
/* public functions */
void
splash_create (Pika *pika,
gboolean be_verbose,
GdkMonitor *monitor,
PikaApp *app)
{
GtkWidget *frame;
GtkWidget *vbox;
GdkPixbufAnimation *pixbuf;
PangoRectangle ink;
GdkRectangle workarea;
gint max_width;
gint max_height;
#ifdef G_OS_WIN32
STARTUPINFO StartupInfo;
GetStartupInfo (&StartupInfo);
#endif
g_return_if_fail (splash == NULL);
g_return_if_fail (GDK_IS_MONITOR (monitor));
g_return_if_fail (PIKA_IS_APP (app) || app == NULL);
gdk_monitor_get_workarea (monitor, &workarea);
#ifdef GDK_WINDOWING_WAYLAND
if (GDK_IS_WAYLAND_DISPLAY (gdk_display_get_default ()))
{
/* This is completely extra ugly. Basically we cannot rely on
* gdk_monitor_get_workarea() on Wayland because the application
* cannot get trustworthy values. Indeed it is supposed to return
* a value in "application pixels" not "device pixels", in other
* words already inverse-scaled value. It turns out that on
* Wayland, under some conditions (but maybe not even all the
* time? I'm still unclear if there are conditions where returned
* value is properly scaled), it returns the device dimensions.
* E.g. on high-density display x2, making a splash for half the
* value, we ended up actually with the size of the whole display.
* This is why I special-case Wayland with a max of a third of the
* work area so that it would end up 2/3 maximum (at least not
* filling the screen!).
* This is ugly but for now I don't see the right solution. FIXME!
* See #5322.
*/
max_width = workarea.width / 3;
max_height = workarea.height / 3;
}
else
#endif
{
max_width = workarea.width / 2;
max_height = workarea.height / 2;
}
pixbuf = splash_image_load (pika, max_width, max_height, be_verbose);
if (! pixbuf)
return;
splash = g_slice_new0 (PikaSplash);
splash->window =
g_object_new (GTK_TYPE_APPLICATION_WINDOW,
"type", GTK_WINDOW_TOPLEVEL,
"type-hint", GDK_WINDOW_TYPE_HINT_SPLASHSCREEN,
"title", _("PIKA Startup"),
"role", "pika-startup",
"window-position", GTK_WIN_POS_CENTER,
"resizable", FALSE,
"application", GTK_APPLICATION (app),
NULL);
/* Don't remove this call, it's necessary to remove decorations on Windows
* (which is the natural state of splash-screens). Looks like the
* GDK_WINDOW_TYPE_HINT_SPLASHSCREEN hint is not used on some platforms.
*/
gtk_window_set_decorated (GTK_WINDOW (splash->window), FALSE);
g_signal_connect_swapped (splash->window, "delete-event",
G_CALLBACK (exit),
GINT_TO_POINTER (0));
splash->width = MIN (gdk_pixbuf_animation_get_width (pixbuf),
workarea.width);
splash->height = MIN (gdk_pixbuf_animation_get_height (pixbuf),
workarea.height);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (splash->window), frame);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
splash->area = gtk_image_new_from_animation (pixbuf);
gtk_box_pack_start (GTK_BOX (vbox), splash->area, TRUE, TRUE, 0);
gtk_widget_show (splash->area);
gtk_widget_set_size_request (splash->area, splash->width, splash->height);
/* create the pango layouts */
splash->upper = gtk_widget_create_pango_layout (splash->area,
MEASURE_UPPER);
pango_layout_get_pixel_extents (splash->upper, &ink, NULL);
if (splash->width > 4 * ink.width)
pika_pango_layout_set_scale (splash->upper, PANGO_SCALE_X_LARGE);
else if (splash->width > 3 * ink.width)
pika_pango_layout_set_scale (splash->upper, PANGO_SCALE_LARGE);
else if (splash->width > 2 * ink.width)
pika_pango_layout_set_scale (splash->upper, PANGO_SCALE_MEDIUM);
else
pika_pango_layout_set_scale (splash->upper, PANGO_SCALE_SMALL);
splash->lower = gtk_widget_create_pango_layout (splash->area,
MEASURE_LOWER);
pango_layout_get_pixel_extents (splash->lower, &ink, NULL);
if (splash->width > 4 * ink.width)
pika_pango_layout_set_scale (splash->lower, PANGO_SCALE_LARGE);
else if (splash->width > 3 * ink.width)
pika_pango_layout_set_scale (splash->lower, PANGO_SCALE_MEDIUM);
else if (splash->width > 2 * ink.width)
pika_pango_layout_set_scale (splash->lower, PANGO_SCALE_SMALL);
else
pika_pango_layout_set_scale (splash->lower, PANGO_SCALE_X_SMALL);
/* this sets the initial layout positions */
splash_position_layouts (splash, "", "", NULL);
splash_average_text_area (splash,
gdk_pixbuf_animation_get_static_image (pixbuf),
&splash->color);
g_object_unref (pixbuf);
g_signal_connect_after (splash->area, "draw",
G_CALLBACK (splash_area_draw),
splash);
/* add a progress bar */
splash->progress = gtk_progress_bar_new ();
gtk_box_pack_end (GTK_BOX (vbox), splash->progress, FALSE, FALSE, 0);
gtk_widget_show (splash->progress);
gtk_widget_show (splash->window);
#ifdef G_OS_WIN32
if (StartupInfo.wShowWindow == SW_SHOWMINIMIZED ||
StartupInfo.wShowWindow == SW_SHOWMINNOACTIVE ||
StartupInfo.wShowWindow == SW_MINIMIZE)
gtk_window_iconify (GTK_WINDOW (splash->window));
#endif
if (FALSE)
splash->timer = g_timer_new ();
}
void
splash_destroy (void)
{
if (! splash)
return;
gtk_widget_destroy (splash->window);
g_object_unref (splash->upper);
g_object_unref (splash->lower);
g_free (splash->text1);
g_free (splash->text2);
if (splash->timer)
g_timer_destroy (splash->timer);
g_slice_free (PikaSplash, splash);
splash = NULL;
}
void
splash_update (const gchar *text1,
const gchar *text2,
gdouble percentage)
{
static GdkRectangle prev_expose = { 0, 0, 0, 0 };
GdkRectangle expose = { 0, 0, 0, 0 };
g_return_if_fail (percentage >= 0.0 && percentage <= 1.0);
if (! splash)
return;
splash_position_layouts (splash, text1, text2, &expose);
gdk_rectangle_union (&expose, &prev_expose, &expose);
if (expose.width > 0 && expose.height > 0)
gtk_widget_queue_draw_area (splash->area,
expose.x, expose.y,
expose.width, expose.height);
prev_expose = expose;
if ((text1 == NULL || ! g_strcmp0 (text1, splash->text1)) &&
(text2 == NULL || ! g_strcmp0 (text2, splash->text2)) &&
percentage == splash->percentage)
{
if (text1)
{
g_free (splash->text1);
splash->text1 = g_strdup (text1);
}
if (text2)
{
g_free (splash->text2);
splash->text2 = g_strdup (text2);
}
gtk_progress_bar_pulse (GTK_PROGRESS_BAR (splash->progress));
}
else
{
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (splash->progress),
percentage);
}
splash->percentage = percentage;
if (splash->timer)
splash_timer_elapsed ();
if (gtk_events_pending ())
gtk_main_iteration ();
}
/* private functions */
static gboolean
splash_area_draw (GtkWidget *widget,
cairo_t *cr,
PikaSplash *splash)
{
gdk_cairo_set_source_rgba (cr, &splash->color);
cairo_move_to (cr, splash->upper_x, splash->upper_y);
pango_cairo_show_layout (cr, splash->upper);
cairo_move_to (cr, splash->lower_x, splash->lower_y);
pango_cairo_show_layout (cr, splash->lower);
return FALSE;
}
/* area returns the union of the previous and new ink rectangles */
static void
splash_position_layouts (PikaSplash *splash,
const gchar *text1,
const gchar *text2,
GdkRectangle *area)
{
PangoRectangle upper_ink;
PangoRectangle lower_ink;
gint text_height = 0;
if (text1)
{
pango_layout_get_pixel_extents (splash->upper, &upper_ink, NULL);
if (area)
splash_rectangle_union (area, &upper_ink,
splash->upper_x, splash->upper_y);
pango_layout_set_text (splash->upper, text1, -1);
pango_layout_get_pixel_extents (splash->upper,
&upper_ink, NULL);
splash->upper_x = (splash->width - upper_ink.width) / 2;
text_height += upper_ink.height;
}
if (text2)
{
pango_layout_get_pixel_extents (splash->lower, &lower_ink, NULL);
if (area)
splash_rectangle_union (area, &lower_ink,
splash->lower_x, splash->lower_y);
pango_layout_set_text (splash->lower, text2, -1);
pango_layout_get_pixel_extents (splash->lower,
&lower_ink, NULL);
splash->lower_x = (splash->width - lower_ink.width) / 2;
text_height += lower_ink.height;
}
/* For pretty printing, let's say we want at least double space. */
text_height *= 2;
/* The ordinates are computed in 2 steps, because we are first
* checking the minimal height needed for text (text_height).
*
* Ideally we are printing in the bottom quarter of the splash image,
* with well centered positions. But if this zone appears to be too
* small, we will end up using this previously computed text_height
* instead. Since splash images are designed to have text in the lower
* quarter, this may end up a bit uglier, but at least top and bottom
* texts won't overlay each other.
*/
if (text1)
{
splash->upper_y = MIN (splash->height - text_height,
splash->height * 13 / 16 -
upper_ink.height / 2);
if (area)
splash_rectangle_union (area, &upper_ink,
splash->upper_x, splash->upper_y);
}
if (text2)
{
splash->lower_y = ((splash->height + splash->upper_y) / 2 -
lower_ink.height / 2);
if (area)
splash_rectangle_union (area, &lower_ink,
splash->lower_x, splash->lower_y);
}
}
static void
splash_rectangle_union (GdkRectangle *dest,
PangoRectangle *pango_rect,
gint offset_x,
gint offset_y)
{
GdkRectangle rect;
rect.x = pango_rect->x + offset_x;
rect.y = pango_rect->y + offset_y;
rect.width = pango_rect->width;
rect.height = pango_rect->height;
if (dest->width > 0 && dest->height > 0)
gdk_rectangle_union (dest, &rect, dest);
else
*dest = rect;
}
/* This function chooses a gray value for the text color, based on
* the average luminance of the text area of the splash image.
*/
static void
splash_average_text_area (PikaSplash *splash,
GdkPixbuf *pixbuf,
GdkRGBA *color)
{
const guchar *pixels;
gint rowstride;
gint channels;
gint luminance = 0;
guint sum[3] = { 0, 0, 0 };
GdkRectangle image = { 0, 0, 0, 0 };
GdkRectangle area = { 0, 0, 0, 0 };
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
g_return_if_fail (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
image.width = gdk_pixbuf_get_width (pixbuf);
image.height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
channels = gdk_pixbuf_get_n_channels (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
splash_position_layouts (splash, MEASURE_UPPER, MEASURE_LOWER, &area);
splash_position_layouts (splash, "", "", NULL);
if (gdk_rectangle_intersect (&image, &area, &area))
{
const gint count = area.width * area.height;
gint x, y;
pixels += area.x * channels;
pixels += area.y * rowstride;
for (y = 0; y < area.height; y++)
{
const guchar *src = pixels;
for (x = 0; x < area.width; x++)
{
sum[0] += src[0];
sum[1] += src[1];
sum[2] += src[2];
src += channels;
}
pixels += rowstride;
}
luminance = PIKA_RGB_LUMINANCE (sum[0] / count,
sum[1] / count,
sum[2] / count);
luminance = CLAMP0255 (luminance > 127 ?
luminance - 223 : luminance + 223);
}
color->red = color->green = color->blue = luminance / 255.0;
color->alpha = 1.0;
}
static GdkPixbufAnimation *
splash_image_load (Pika *pika,
gint max_width,
gint max_height,
gboolean be_verbose)
{
GdkPixbufAnimation *animation = NULL;
GFile *file;
GList *list;
/* Random image in splash extensions. */
g_object_get (pika->extension_manager,
"splash-paths", &list,
NULL);
animation = splash_image_pick_from_dirs (list,
max_width, max_height,
be_verbose);
if (animation)
return animation;
/* File "pika-splash.png" in personal configuration directory. */
file = pika_directory_file ("pika-splash.png", NULL);
animation = splash_image_load_from_file (file,
max_width, max_height,
be_verbose);
g_object_unref (file);
if (animation)
return animation;
/* Random image under splashes/ directory in personal config dir. */
file = pika_directory_file ("splashes", NULL);
list = NULL;
list = g_list_prepend (list, file);
animation = splash_image_pick_from_dirs (list,
max_width, max_height,
be_verbose);
g_list_free_full (list, g_object_unref);
if (animation)
return animation;
/* Release splash image. */
file = pika_data_directory_file ("images", "pika-splash.png", NULL);
animation = splash_image_load_from_file (file,
max_width, max_height,
be_verbose);
g_object_unref (file);
if (animation)
return animation;
/* Random release image in installed splashes/ directory. */
file = pika_data_directory_file ("splashes", NULL);
list = NULL;
list = g_list_prepend (list, file);
animation = splash_image_pick_from_dirs (list,
max_width, max_height,
be_verbose);
g_list_free_full (list, g_object_unref);
return animation;
}
static GdkPixbufAnimation *
splash_image_load_from_file (GFile *file,
gint max_width,
gint max_height,
gboolean be_verbose)
{
GdkPixbufAnimation *animation = NULL;
GFileInfo *info;
GFileInputStream *input;
gboolean is_svg = FALSE;
if (be_verbose)
g_printerr ("Trying splash '%s' ... ", g_file_peek_path (file));
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
G_FILE_QUERY_INFO_NONE, NULL, NULL);
if (info)
{
const gchar *content_type;
content_type = g_file_info_get_attribute_string (info, G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE);
if (content_type)
{
gchar *mime_type;
mime_type = g_content_type_get_mime_type (content_type);
if (mime_type)
{
if (g_strcmp0 (mime_type, "image/svg+xml") == 0)
{
/* We want to treat vector images differently than
* pixel images. We only scale down bitmaps, but we
* don't try to scale them up.
* On the other hand, we can always scale down and up
* vector images so that they end up in an ideal size
* in all cases.
*/
is_svg = TRUE;
}
g_free (mime_type);
}
}
g_object_unref (info);
}
input = g_file_read (file, NULL, NULL);
if (input)
{
animation = gdk_pixbuf_animation_new_from_stream (G_INPUT_STREAM (input),
NULL, NULL);
g_object_unref (input);
}
/* FIXME Right now, we only try to scale static images.
* Animated images may end up bigger than the expected max dimensions.
*/
if (animation && gdk_pixbuf_animation_is_static_image (animation) &&
(gdk_pixbuf_animation_get_width (animation) > max_width ||
gdk_pixbuf_animation_get_height (animation) > max_height ||
is_svg))
{
GdkPixbuf *pixbuf;
input = g_file_read (file, NULL, NULL);
pixbuf = gdk_pixbuf_new_from_stream_at_scale (G_INPUT_STREAM (input),
max_width, max_height,
TRUE, NULL, NULL);
g_object_unref (input);
if (pixbuf)
{
GdkPixbufSimpleAnim *simple_anim = NULL;
simple_anim = gdk_pixbuf_simple_anim_new (gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
1.0);
if (simple_anim)
{
gdk_pixbuf_simple_anim_add_frame (simple_anim, pixbuf);
g_object_unref (animation);
animation = GDK_PIXBUF_ANIMATION (simple_anim);
}
g_object_unref (pixbuf);
}
}
if (be_verbose)
g_printerr (animation ? "OK\n" : "failed\n");
return animation;
}
static GdkPixbufAnimation *
splash_image_pick_from_dirs (GList *dirs,
gint max_width,
gint max_height,
gboolean be_verbose)
{
GdkPixbufAnimation *animation = NULL;
GList *splashes = NULL;
GList *iter;
for (iter = dirs; iter; iter = iter->next)
{
GFileEnumerator *enumerator;
enumerator = g_file_enumerate_children (iter->data,
G_FILE_ATTRIBUTE_STANDARD_NAME ","
G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
G_FILE_ATTRIBUTE_TIME_MODIFIED,
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (enumerator)
{
GFileInfo *info;
while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)))
{
GFile *child;
child = g_file_enumerator_get_child (enumerator, info);
if (g_file_query_file_type (child,
G_FILE_QUERY_INFO_NONE,
NULL) == G_FILE_TYPE_REGULAR)
splashes = g_list_prepend (splashes, child);
else
g_object_unref (child);
g_object_unref (info);
}
g_object_unref (enumerator);
}
}
if (splashes)
{
gint32 i = g_random_int_range (0, g_list_length (splashes));
animation = splash_image_load_from_file (g_list_nth_data (splashes, i),
max_width, max_height,
be_verbose);
g_list_free_full (splashes, (GDestroyNotify) g_object_unref);
}
return animation;
}
static void
splash_timer_elapsed (void)
{
gdouble elapsed = g_timer_elapsed (splash->timer, NULL);
g_printerr ("%8g %8g - %s %g%% - %s\n",
elapsed,
elapsed - splash->last_time,
splash->text1 ? splash->text1 : "",
splash->percentage * 100.0,
splash->text2 ? splash->text2 : "");
splash->last_time = elapsed;
}
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