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tools: Add gtk4-path-tool

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This comes in handy for testing, among other things.

For now, this supports decomposing, reversing, rendering,
info and preview.
This commit is contained in:
Matthias Clasen 2023-06-26 08:41:08 -04:00
parent 44bc5a139c
commit 62176a3bd0
12 changed files with 1347 additions and 0 deletions
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121
docs/reference/gtk/gtk4-path-tool.rst Normal file
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@ -0,0 +1,121 @@
.. _gtk4-path-tool(1):
=================
gtk4-path-tool
=================
-----------------------
GskPath Utility
-----------------------
SYNOPSIS
--------
| **gtk4-path-tool** <COMMAND> [OPTIONS...] <PATH>
|
| **gtk4-path-tool** decompose [OPTIONS...] <PATH>
| **gtk4-path-tool** restrict [OPTIONS...] <PATH>
| **gtk4-path-tool** show [OPTIONS...] <PATH>
| **gtk4-path-tool** render [OPTIONS...] <PATH>
| **gtk4-path-tool** info [OPTIONS...] <PATH>
DESCRIPTION
-----------
``gtk4-path-tool`` can perform various tasks on paths. Paths are specified
in SVG syntax, as strings like "M 100 100 C 100 200 200 200 200 100 Z".
To read a path from a file, use a filename that starts with a '.' or a '/'.
To read a path from stdin, use '-'.
COMMANDS
--------
Decomposing
^^^^^^^^^^^
The ``decompose`` command approximates the path by one with simpler elements.
When used without options, the curves of the path are approximated by line
segments.
``--allow-curves``
Allow cubic Bézier curves to be used in the generated path.
``--allow-conics``
Allow rational quadratic Bézier curves to be used in the generated path.
Restricting
^^^^^^^^^^^
The ``restrict`` command creates a path that traces a segment of the original
path. Note that the start and the end of the segment are specified as
path length from the beginning of the path.
``--start=LENGTH``
The distance from the beginning of the path where the segment begins. The
default values is 0.
``--end=LENGTH``
The distance from the beginning of the path where the segment ends. The
default value is the length of path.
Showing
^^^^^^^
The ``show`` command displays the given path in a window. The interior
of the path is filled.
``--fill-rule=VALUE``
The fill rule that is used to determine what areas are inside the path.
The possible values are ``winding`` or ``even-odd``. The default is ``winding``.
``--fg-color=COLOR``
The color that is used to fill the interior of the path.
If not specified, black is used.
``--bg-color=COLOR``
The color that is used to render the background behind the path.
If not specified, white is used.
Rendering
^^^^^^^^^
The ``render`` command renders the given path as a PNG image.
The interior of the path is filled.
``--fill-rule=VALUE``
The fill rule that is used to determine what areas are inside the path.
The possible values are ``winding`` or ``even-odd``. The default is ``winding``.
``--fg-color=COLOR``
The color that is used to fill the interior of the path.
If not specified, black is used.
``--bg-color=COLOR``
The color that is used to render the background behind the path.
If not specified, white is used.
``--output-file=FILE``
The file to save the PNG image to.
If not specified, "path.png" is used.
Info
^^^^
The ``info`` command shows various information about the given path,
such as its bounding box and and its length.
REFERENCES
----------
- SVG Path Specification, https://www.w3.org/TR/SVG2/paths.html

1
docs/reference/gtk/meson.build
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@ -77,6 +77,7 @@ if get_option('man-pages') and rst2man.found()
[ 'gtk4-query-settings', '1', ],
[ 'gtk4-rendernode-tool', '1' ],
[ 'gtk4-update-icon-cache', '1', ],
[ 'gtk4-path-tool', '1', ],
]
if get_option('demos')

131
tools/gtk-path-tool-decompose.c Normal file
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/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
#include <glib/gi18n-lib.h>
static gboolean
foreach_cb (GskPathOperation op,
const graphene_point_t *pts,
gsize n_pts,
gpointer user_data)
{
GskPathBuilder *builder = user_data;
switch (op)
{
case GSK_PATH_MOVE:
gsk_path_builder_move_to (builder, pts[0].x, pts[0].y);
break;
case GSK_PATH_CLOSE:
gsk_path_builder_close (builder);
break;
case GSK_PATH_LINE:
gsk_path_builder_line_to (builder, pts[1].x, pts[1].y);
break;
case GSK_PATH_QUAD:
gsk_path_builder_quad_to (builder, pts[1].x, pts[1].y, pts[2].x, pts[2].y);
break;
case GSK_PATH_CUBIC:
gsk_path_builder_cubic_to (builder, pts[1].x, pts[1].y,
pts[2].x, pts[2].y,
pts[3].x, pts[3].y);
break;
default:
g_assert_not_reached ();
}
return TRUE;
}
void
do_decompose (int *argc, const char ***argv)
{
GError *error = NULL;
gboolean allow_quad = FALSE;
gboolean allow_curve = FALSE;
char **args = NULL;
GOptionContext *context;
GOptionEntry entries[] = {
{ "allow-quad", 0, 0, G_OPTION_ARG_NONE, &allow_quad, N_("Allow quadratic Bézier curves"), NULL },
{ "allow-cubic", 0, 0, G_OPTION_ARG_NONE, &allow_curve, N_("Allow cubic Bézier curves"), NULL },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &args, NULL, N_("PATH") },
{ NULL, },
};
GskPathForeachFlags flags;
GskPath *path, *result;
GskPathBuilder *builder;
g_set_prgname ("gtk4-path-tool decompose");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Decompose a path."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (args == NULL)
{
g_printerr ("%s\n", _("No paths given."));
exit (1);
}
path = get_path (args[0]);
flags = 0;
if (allow_quad)
flags |= GSK_PATH_FOREACH_ALLOW_QUAD;
if (allow_curve)
flags |= GSK_PATH_FOREACH_ALLOW_CUBIC;
builder = gsk_path_builder_new ();
gsk_path_foreach (path, flags, foreach_cb, builder);
result = gsk_path_builder_free_to_path (builder);
if (result)
{
char *str = gsk_path_to_string (result);
g_print ("%s\n", str);
g_free (str);
}
else
{
g_printerr ("%s\n", _("That didn't work out."));
exit (1);
}
}

76
tools/gtk-path-tool-info.c Normal file
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/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
#include <glib/gi18n-lib.h>
void
do_info (int *argc, const char ***argv)
{
GError *error = NULL;
char **args = NULL;
GOptionContext *context;
GOptionEntry entries[] = {
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &args, NULL, N_("PATH") },
{ NULL, },
};
GskPath *path;
graphene_rect_t bounds;
g_set_prgname ("gtk4-path-tool info");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Print information about a path."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (args == NULL)
{
g_printerr ("%s\n", _("No paths given."));
exit (1);
}
path = get_path (args[0]);
if (gsk_path_is_empty (path))
g_print ("%s\n", _("Path is empty."));
else
{
if (gsk_path_is_closed (path))
g_print ("%s\n", _("Path is closed"));
if (gsk_path_get_bounds (path, &bounds))
g_print ("%s: %g %g %g %g\n", _("Bounds"),
bounds.origin.x, bounds.origin.y,
bounds.size.width, bounds.size.height);
}
}

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tools/gtk-path-tool-render.c Normal file
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/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib/gi18n-lib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
void
do_render (int *argc,
const char ***argv)
{
GError *error = NULL;
const char *fill = "winding";
const char *fg_color = "black";
const char *bg_color = "white";
gboolean do_stroke = FALSE;
double line_width = 1;
const char *cap = "butt";
const char *join = "miter";
double miter_limit = 4;
const char *dashes = NULL;
double dash_offset = 0;
const char *output_file = NULL;
char **args = NULL;
GOptionContext *context;
const GOptionEntry entries[] = {
{ "fill-rule", 0, 0, G_OPTION_ARG_STRING, &fill, N_("Fill rule (winding, even-odd)"), N_("VALUE") },
{ "fg-color", 0, 0, G_OPTION_ARG_STRING, &fg_color, N_("Foreground color"), N_("COLOR") },
{ "bg-color", 0, 0, G_OPTION_ARG_STRING, &bg_color, N_("Background color"), N_("COLOR") },
{ "stroke", 0, 0, G_OPTION_ARG_NONE, &do_stroke, N_("Stroke the path instead of filling it"), NULL },
{ "line-width", 0, 0, G_OPTION_ARG_DOUBLE, &line_width, N_("Line width (number)"), N_("VALUE") },
{ "line-cap", 0, 0, G_OPTION_ARG_STRING, &cap, N_("Line cap (butt, round, square)"), N_("VALUE") },
{ "line-join", 0, 0, G_OPTION_ARG_STRING, &join, N_("Line join (miter, miter-clip, round, bevel, arcs)"), N_("VALUE") },
{ "miter-limit", 0, 0, G_OPTION_ARG_DOUBLE, &miter_limit, N_("Miter limit (number)"), N_("VALUE") },
{ "dashes", 0, 0, G_OPTION_ARG_STRING, &dashes, N_("Dash pattern (comma-separated numbers)"), N_("VALUE") },
{ "dash-offset", 0, 0, G_OPTION_ARG_DOUBLE, &dash_offset, N_("Dash offset (number)"), N_("VALUE") },
{ "output", 0, 0, G_OPTION_ARG_FILENAME, &output_file, N_("The output file"), N_("FILE") },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &args, NULL, N_("PATH") },
{ NULL, }
};
GskPath *path;
GskFillRule fill_rule;
GdkRGBA fg, bg;
graphene_rect_t bounds;
GskRenderNode *fg_node, *nodes[2], *node;
GdkSurface *surface;
GskRenderer *renderer;
GdkTexture *texture;
const char *filename;
GskLineCap line_cap;
GskLineJoin line_join;
GskStroke *stroke;
if (gdk_display_get_default () == NULL)
{
g_printerr ("%s\n", _("Could not initialize windowing system"));
exit (1);
}
g_set_prgname ("gtk4-path-tool render");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Render the path to a png image."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (args == NULL)
{
g_printerr ("%s\n", _("No path specified"));
exit (1);
}
if (g_strv_length (args) > 1)
{
g_printerr ("%s\n", _("Can only render a single path"));
exit (1);
}
path = get_path (args[0]);
fill_rule = get_enum_value (GSK_TYPE_FILL_RULE, _("fill rule"), fill);
get_color (&fg, fg_color);
get_color (&bg, bg_color);
line_cap = get_enum_value (GSK_TYPE_LINE_CAP, _("line cap"), cap);
line_join = get_enum_value (GSK_TYPE_LINE_JOIN, _("line join"), join);
stroke = gsk_stroke_new (line_width);
gsk_stroke_set_line_cap (stroke, line_cap);
gsk_stroke_set_line_join (stroke, line_join);
gsk_stroke_set_miter_limit (stroke, miter_limit);
if (dashes != NULL)
{
GArray *d = g_array_new (FALSE, FALSE, sizeof (float));
char **strings;
strings = g_strsplit (dashes, ",", 0);
for (unsigned int i = 0; strings[i]; i++)
{
char *end = NULL;
float f;
f = (float) g_ascii_strtod (strings[i], &end);
if (*end != '\0')
{
char *msg = g_strdup_printf (_("Failed to parse '%s' as number"), strings[i]);
g_printerr ("%s\n", msg);
exit (1);
}
g_array_append_val (d, f);
}
g_strfreev (strings);
gsk_stroke_set_dash (stroke, (const float *)d->data, d->len);
g_array_unref (d);
}
gsk_stroke_set_dash_offset (stroke, dash_offset);
if (do_stroke)
gsk_path_get_stroke_bounds (path, stroke, &bounds);
else
gsk_path_get_bounds (path, &bounds);
graphene_rect_inset (&bounds, -10, -10);
nodes[0] = gsk_color_node_new (&bg, &bounds);
fg_node = gsk_color_node_new (&fg, &bounds);
if (do_stroke)
nodes[1] = gsk_stroke_node_new (fg_node, path, stroke);
else
nodes[1] = gsk_fill_node_new (fg_node, path, fill_rule);
node = gsk_container_node_new (nodes, 2);
gsk_render_node_unref (fg_node);
gsk_render_node_unref (nodes[0]);
gsk_render_node_unref (nodes[1]);
surface = gdk_surface_new_toplevel (gdk_display_get_default ());
renderer = gsk_renderer_new_for_surface (surface);
texture = gsk_renderer_render_texture (renderer, node, &bounds);
filename = output_file ? output_file : "path.png";
if (!gdk_texture_save_to_png (texture, filename))
{
char *msg = g_strdup_printf (_("Saving png to '%s' failed"), filename);
g_printerr ("%s\n", msg);
exit (1);
}
if (output_file == NULL)
{
char *msg = g_strdup_printf (_("Output written to '%s'."), filename);
g_print ("%s\n", msg);
g_free (msg);
}
g_object_unref (texture);
gsk_renderer_unrealize (renderer);
g_object_unref (renderer);
g_object_unref (surface);
gsk_render_node_unref (node);
gsk_path_unref (path);
g_strfreev (args);
}

232
tools/gtk-path-tool-show.c Normal file
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/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib/gi18n-lib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
#include "path-view.h"
static void
show_path_fill (GskPath *path,
GskFillRule fill_rule,
const GdkRGBA *fg_color,
const GdkRGBA *bg_color)
{
GtkWidget *window, *sw, *child;
window = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (window), _("Path Preview"));
// gtk_window_set_default_size (GTK_WINDOW (window), 700, 500);
sw = gtk_scrolled_window_new ();
gtk_scrolled_window_set_propagate_natural_width (GTK_SCROLLED_WINDOW (sw), TRUE);
gtk_scrolled_window_set_propagate_natural_height (GTK_SCROLLED_WINDOW (sw), TRUE);
gtk_window_set_child (GTK_WINDOW (window), sw);
child = path_view_new (path);
g_object_set (child,
"do-fill", TRUE,
"fill-rule", fill_rule,
"fg-color", fg_color,
"bg-color", bg_color,
NULL);
gtk_widget_set_hexpand (child, TRUE);
gtk_widget_set_vexpand (child, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
gtk_window_present (GTK_WINDOW (window));
while (g_list_model_get_n_items (gtk_window_get_toplevels ()) > 0)
g_main_context_iteration (NULL, TRUE);
}
static void
show_path_stroke (GskPath *path,
GskStroke *stroke,
const GdkRGBA *fg_color,
const GdkRGBA *bg_color)
{
GtkWidget *window, *sw, *child;
window = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (window), _("Path Preview"));
// gtk_window_set_default_size (GTK_WINDOW (window), 700, 500);
sw = gtk_scrolled_window_new ();
gtk_scrolled_window_set_propagate_natural_width (GTK_SCROLLED_WINDOW (sw), TRUE);
gtk_scrolled_window_set_propagate_natural_height (GTK_SCROLLED_WINDOW (sw), TRUE);
gtk_window_set_child (GTK_WINDOW (window), sw);
child = path_view_new (path);
g_object_set (child,
"do-fill", FALSE,
"stroke", stroke,
"fg-color", fg_color,
"bg-color", bg_color,
NULL);
gtk_widget_set_hexpand (child, TRUE);
gtk_widget_set_vexpand (child, TRUE);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
gtk_window_present (GTK_WINDOW (window));
while (g_list_model_get_n_items (gtk_window_get_toplevels ()) > 0)
g_main_context_iteration (NULL, TRUE);
}
void
do_show (int *argc,
const char ***argv)
{
GError *error = NULL;
gboolean do_stroke = FALSE;
const char *fill = "winding";
const char *fg_color = "black";
const char *bg_color = "white";
double line_width = 1;
const char *cap = "butt";
const char *join = "miter";
double miter_limit = 4;
const char *dashes = NULL;
double dash_offset = 0;
char **args = NULL;
GOptionContext *context;
const GOptionEntry entries[] = {
{ "fill-rule", 0, 0, G_OPTION_ARG_STRING, &fill, N_("Fill rule (winding, even-odd)"), N_("VALUE") },
{ "fg-color", 0, 0, G_OPTION_ARG_STRING, &fg_color, N_("Foreground color"), N_("COLOR") },
{ "bg-color", 0, 0, G_OPTION_ARG_STRING, &bg_color, N_("Background color"), N_("COLOR") },
{ "stroke", 0, 0, G_OPTION_ARG_NONE, &do_stroke, N_("Stroke the path instead of filling it"), NULL },
{ "line-width", 0, 0, G_OPTION_ARG_DOUBLE, &line_width, N_("Line width (number)"), N_("VALUE") },
{ "line-cap", 0, 0, G_OPTION_ARG_STRING, &cap, N_("Line cap (butt, round, square)"), N_("VALUE") },
{ "line-join", 0, 0, G_OPTION_ARG_STRING, &join, N_("Line join (miter, miter-clip, round, bevel, arcs)"), N_("VALUE") },
{ "miter-limit", 0, 0, G_OPTION_ARG_DOUBLE, &miter_limit, N_("Miter limit (number)"), N_("VALUE") },
{ "dashes", 0, 0, G_OPTION_ARG_STRING, &dashes, N_("Dash pattern (comma-separated numbers)"), N_("VALUE") },
{ "dash-offset", 0, 0, G_OPTION_ARG_DOUBLE, &dash_offset, N_("Dash offset (number)"), N_("VALUE") },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &args, NULL, N_("PATH") },
{ NULL, }
};
GskPath *path;
GskFillRule fill_rule;
GdkRGBA fg;
GdkRGBA bg;
GskLineCap line_cap;
GskLineJoin line_join;
GskStroke *stroke;
if (gdk_display_get_default () == NULL)
{
g_printerr ("%s\n", _("Could not initialize windowing system"));
exit (1);
}
g_set_prgname ("gtk4-path-tool show");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Display the path."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (args == NULL)
{
g_printerr ("%s\n", _("No path specified"));
exit (1);
}
if (g_strv_length (args) > 1)
{
g_printerr ("%s\n", _("Can only show a single path"));
exit (1);
}
path = get_path (args[0]);
fill_rule = get_enum_value (GSK_TYPE_FILL_RULE, _("fill rule"), fill);
get_color (&fg, fg_color);
get_color (&bg, bg_color);
line_cap = get_enum_value (GSK_TYPE_LINE_CAP, _("line cap"), cap);
line_join = get_enum_value (GSK_TYPE_LINE_JOIN, _("line join"), join);
stroke = gsk_stroke_new (line_width);
gsk_stroke_set_line_cap (stroke, line_cap);
gsk_stroke_set_line_join (stroke, line_join);
gsk_stroke_set_miter_limit (stroke, miter_limit);
if (dashes != NULL)
{
GArray *d = g_array_new (FALSE, FALSE, sizeof (float));
char **strings;
strings = g_strsplit (dashes, ",", 0);
for (unsigned int i = 0; strings[i]; i++)
{
char *end = NULL;
float f;
f = (float) g_ascii_strtod (strings[i], &end);
if (*end != '\0')
{
char *msg = g_strdup_printf (_("Failed to parse '%s' as number"), strings[i]);
g_printerr ("%s\n", msg);
exit (1);
}
g_array_append_val (d, f);
}
g_strfreev (strings);
gsk_stroke_set_dash (stroke, (const float *)d->data, d->len);
g_array_unref (d);
}
gsk_stroke_set_dash_offset (stroke, dash_offset);
if (do_stroke)
show_path_stroke (path, stroke, &fg, &bg);
else
show_path_fill (path, fill_rule, &fg, &bg);
gsk_path_unref (path);
g_strfreev (args);
}

139
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@ -0,0 +1,139 @@
/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <gtk/gtk.h>
#include <gio/gio.h>
#ifdef G_OS_UNIX
#include <gio/gunixinputstream.h>
#endif
#include "gtk-path-tool.h"
#include <glib/gi18n-lib.h>
GskPath *
get_path (const char *arg)
{
char *buffer = NULL;
gsize len;
GError *error = NULL;
GskPath *path;
if (arg[0] == '.' || arg[0] == '/')
{
if (!g_file_get_contents (arg, &buffer, &len, &error))
{
g_printerr ("%s\n", error->message);
exit (1);
}
}
#ifdef G_OS_UNIX
else if (strcmp (arg, "-") == 0)
{
GInputStream *in;
GOutputStream *out;
in = g_unix_input_stream_new (0, FALSE);
out = g_memory_output_stream_new (NULL, 0, g_realloc, g_free);
if (g_output_stream_splice (out, in, 0, NULL, &error) < 0)
{
g_printerr (_("Failed to read from standard input: %s\n"), error->message);
exit (1);
}
if (!g_output_stream_close (out, NULL, &error))
{
g_printerr (_("Error reading from standard input: %s\n"), error->message);
exit (1);
}
buffer = g_memory_output_stream_steal_data (G_MEMORY_OUTPUT_STREAM (out));
g_object_unref (out);
g_object_unref (in);
}
#endif
else
buffer = g_strdup (arg);
g_strstrip (buffer);
path = gsk_path_parse (buffer);
if (path == NULL)
{
g_printerr (_("Failed to parse '%s' as path.\n"), arg);
exit (1);
}
g_free (buffer);
return path;
}
int
get_enum_value (GType type,
const char *type_nick,
const char *str)
{
GEnumClass *class = g_type_class_ref (type);
GEnumValue *value;
int val;
value = g_enum_get_value_by_nick (class, str);
if (value)
val = value->value;
else
{
GString *s;
s = g_string_new ("");
g_string_append_printf (s, _("Failed to parse '%s' as %s."), str, type_nick);
g_string_append (s, "\n");
g_string_append (s, _("Possible values: "));
for (unsigned int i = 0; i < class->n_values; i++)
{
if (i > 0)
g_string_append (s, ", ");
g_string_append (s, class->values[i].value_nick);
}
g_printerr ("%s\n", s->str);
g_string_free (s, TRUE);
exit (1);
}
g_type_class_unref (class);
return val;
}
void
get_color (GdkRGBA *rgba,
const char *str)
{
if (!gdk_rgba_parse (rgba, str))
{
char *msg = g_strdup_printf (_("Could not parse '%s' as color"), str);
g_printerr ("%s\n", msg);
exit (1);
}
}

139
tools/gtk-path-tool.c Normal file
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@ -0,0 +1,139 @@
/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib/gi18n-lib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
static void G_GNUC_NORETURN
usage (void)
{
g_print (_("Usage:\n"
" gtk4-path-tool [COMMAND] [OPTION…] PATH\n"
"\n"
"Perform various tasks on paths.\n"
"\n"
"Commands:\n"
" decompose Decompose the path\n"
" show Display the path in a window\n"
" render Render the path as an image\n"
" info Print information about the path\n"
"\n"));
exit (1);
}
/* A simplified version of g_log_writer_default_would_drop(), to avoid
* bumping up the required version of GLib to 2.68
*/
static gboolean
would_drop (GLogLevelFlags level,
const char *domain)
{
#if GLIB_CHECK_VERSION (2, 68, 0)
return g_log_writer_default_would_drop (level, domain);
#else
return (level & (G_LOG_LEVEL_ERROR |
G_LOG_LEVEL_CRITICAL |
G_LOG_LEVEL_WARNING)) == 0;
#endif
}
static GLogWriterOutput
log_writer_func (GLogLevelFlags level,
const GLogField *fields,
gsize n_fields,
gpointer user_data)
{
gsize i;
const char *domain = NULL;
const char *message = NULL;
for (i = 0; i < n_fields; i++)
{
if (g_strcmp0 (fields[i].key, "GLIB_DOMAIN") == 0)
domain = fields[i].value;
else if (g_strcmp0 (fields[i].key, "MESSAGE") == 0)
message = fields[i].value;
}
if (message != NULL && !would_drop (level, domain))
{
const char *prefix;
switch (level & G_LOG_LEVEL_MASK)
{
case G_LOG_LEVEL_ERROR:
prefix = "ERROR";
break;
case G_LOG_LEVEL_CRITICAL:
prefix = "CRITICAL";
break;
case G_LOG_LEVEL_WARNING:
prefix = "WARNING";
break;
default:
prefix = "INFO";
break;
}
g_printerr ("%s-%s: %s\n", domain, prefix, message);
}
return G_LOG_WRITER_HANDLED;
}
int
main (int argc, const char *argv[])
{
g_set_prgname ("gtk4-path-tool");
g_log_set_writer_func (log_writer_func, NULL, NULL);
gtk_init_check ();
gtk_test_register_all_types ();
if (argc < 2)
usage ();
if (strcmp (argv[1], "--help") == 0)
usage ();
argv++;
argc--;
if (strcmp (argv[0], "decompose") == 0)
do_decompose (&argc, &argv);
else if (strcmp (argv[0], "info") == 0)
do_info (&argc, &argv);
else if (strcmp (argv[0], "render") == 0)
do_render (&argc, &argv);
else if (strcmp (argv[0], "show") == 0)
do_show (&argc, &argv);
else
usage ();
return 0;
}

13
tools/gtk-path-tool.h Normal file
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@ -0,0 +1,13 @@
#pragma once
void do_info (int *argc, const char ***argv);
void do_decompose (int *argc, const char ***argv);
void do_render (int *argc, const char ***argv);
void do_show (int *argc, const char ***argv);
GskPath *get_path (const char *arg);
int get_enum_value (GType type,
const char *type_nick,
const char *str);
void get_color (GdkRGBA *rgba,
const char *str);

7
tools/meson.build
View File

@ -23,6 +23,13 @@ if win32_enabled
endif
gtk_tools = [
['gtk4-path-tool', ['gtk-path-tool.c',
'gtk-path-tool-decompose.c',
'gtk-path-tool-info.c',
'gtk-path-tool-render.c',
'gtk-path-tool-show.c',
'gtk-path-tool-utils.c',
'path-view.c'], [libgtk_dep]],
['gtk4-query-settings', ['gtk-query-settings.c'], [libgtk_dep]],
['gtk4-builder-tool', ['gtk-builder-tool.c',
'gtk-builder-tool-simplify.c',

271
tools/path-view.c Normal file
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@ -0,0 +1,271 @@
/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include "path-view.h"
struct _PathView
{
GtkWidget parent_instance;
GskPath *path;
GskStroke *stroke;
graphene_rect_t bounds;
GskFillRule fill_rule;
GdkRGBA fg;
GdkRGBA bg;
int padding;
gboolean do_fill;
};
enum {
PROP_PATH = 1,
PROP_DO_FILL,
PROP_STROKE,
PROP_FILL_RULE,
PROP_FG_COLOR,
PROP_BG_COLOR,
N_PROPERTIES
};
static GParamSpec *properties[N_PROPERTIES] = { NULL, };
struct _PathViewClass
{
GtkWidgetClass parent_class;
};
G_DEFINE_TYPE (PathView, path_view, GTK_TYPE_WIDGET)
static void
path_view_init (PathView *self)
{
self->do_fill = TRUE;
self->stroke = gsk_stroke_new (1);
self->fill_rule = GSK_FILL_RULE_WINDING;
self->fg = (GdkRGBA) { 0, 0, 0, 1};
self->bg = (GdkRGBA) { 1, 1, 1, 1};
self->padding = 10;
}
static void
path_view_dispose (GObject *object)
{
PathView *self = PATH_VIEW (object);
g_clear_pointer (&self->path, gsk_path_unref);
g_clear_pointer (&self->stroke, gsk_stroke_free);
G_OBJECT_CLASS (path_view_parent_class)->dispose (object);
}
static void
path_view_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
PathView *self = PATH_VIEW (object);
switch (prop_id)
{
case PROP_PATH:
g_value_set_boxed (value, self->path);
break;
case PROP_DO_FILL:
g_value_set_boolean (value, self->do_fill);
break;
case PROP_STROKE:
g_value_set_boxed (value, self->stroke);
break;
case PROP_FILL_RULE:
g_value_set_enum (value, self->fill_rule);
break;
case PROP_FG_COLOR:
g_value_set_boxed (value, &self->fg);
break;
case PROP_BG_COLOR:
g_value_set_boxed (value, &self->bg);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
update_bounds (PathView *self)
{
if (self->do_fill)
gsk_path_get_bounds (self->path, &self->bounds);
else
gsk_path_get_stroke_bounds (self->path, self->stroke, &self->bounds);
}
static void
path_view_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
PathView *self = PATH_VIEW (object);
switch (prop_id)
{
case PROP_PATH:
g_clear_pointer (&self->path, gsk_path_unref);
self->path = g_value_dup_boxed (value);
update_bounds (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
break;
case PROP_DO_FILL:
self->do_fill = g_value_get_boolean (value);
update_bounds (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
break;
case PROP_STROKE:
gsk_stroke_free (self->stroke);
self->stroke = g_value_get_boxed (value);
update_bounds (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
break;
case PROP_FILL_RULE:
self->fill_rule = g_value_get_enum (value);
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
case PROP_FG_COLOR:
self->fg = *(GdkRGBA *) g_value_get_boxed (value);
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
case PROP_BG_COLOR:
self->bg = *(GdkRGBA *) g_value_get_boxed (value);
gtk_widget_queue_draw (GTK_WIDGET (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
path_view_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
PathView *self = PATH_VIEW (widget);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
*minimum = *natural = (int) ceilf (self->bounds.size.width) + 2 * self->padding;
else
*minimum = *natural = (int) ceilf (self->bounds.size.height) + 2 * self->padding;
}
static void
path_view_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
PathView *self = PATH_VIEW (widget);
graphene_rect_t bounds = self->bounds;
graphene_rect_inset (&bounds, - self->padding, - self->padding);
gtk_snapshot_save (snapshot);
gtk_snapshot_append_color (snapshot, &self->bg, &self->bounds);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (self->padding, self->padding));
if (self->do_fill)
gtk_snapshot_push_fill (snapshot, self->path, self->fill_rule);
else
gtk_snapshot_push_stroke (snapshot, self->path, self->stroke);
gtk_snapshot_append_color (snapshot, &self->fg, &self->bounds);
gtk_snapshot_pop (snapshot);
gtk_snapshot_restore (snapshot);
}
static void
path_view_class_init (PathViewClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->dispose = path_view_dispose;
object_class->get_property = path_view_get_property;
object_class->set_property = path_view_set_property;
widget_class->measure = path_view_measure;
widget_class->snapshot = path_view_snapshot;
properties[PROP_PATH]
= g_param_spec_boxed ("path", NULL, NULL,
GSK_TYPE_PATH,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_DO_FILL]
= g_param_spec_boolean ("do-fill", NULL, NULL,
TRUE,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_STROKE]
= g_param_spec_boxed ("stroke", NULL, NULL,
GSK_TYPE_STROKE,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_FILL_RULE]
= g_param_spec_enum ("fill-rule", NULL, NULL,
GSK_TYPE_FILL_RULE,
GSK_FILL_RULE_WINDING,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_FG_COLOR]
= g_param_spec_boxed ("fg-color", NULL, NULL,
GDK_TYPE_RGBA,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
properties[PROP_BG_COLOR]
= g_param_spec_boxed ("bg-color", NULL, NULL,
GDK_TYPE_RGBA,
G_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, N_PROPERTIES, properties);
}
GtkWidget *
path_view_new (GskPath *path)
{
return g_object_new (PATH_TYPE_VIEW,
"path", path,
NULL);
}

9
tools/path-view.h Normal file
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@ -0,0 +1,9 @@
#pragma once
#include <gtk/gtk.h>
#define PATH_TYPE_VIEW (path_view_get_type ())
G_DECLARE_FINAL_TYPE (PathView, path_view, PATH, VIEW, GtkWidget)
GtkWidget * path_view_new (GskPath *path);