gtk/tools/gtk-rendernode-tool-extract.c
Matthias Clasen 9256b5b552 rendernode tool: Add an extract command
This lets one extract the data urls from a node file.
2024-06-03 08:28:21 -04:00

327 lines
8.0 KiB
C

/* 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.
*
* GTK 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-rendernode-tool.h"
static gboolean verbose;
static char *directory = NULL;
static guint texture_count;
static guint font_count;
static GHashTable *fonts;
static void
extract_texture (GskRenderNode *node)
{
GdkTexture *texture;
char *filename;
char *path;
if (gsk_render_node_get_node_type (node) == GSK_TEXTURE_NODE)
texture = gsk_texture_node_get_texture (node);
else
texture = gsk_texture_scale_node_get_texture (node);
do {
filename = g_strdup_printf ("gtk-texture-%u.ttf", texture_count);
path = g_build_path ("/", directory, filename, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
break;
g_free (path);
g_free (filename);
texture_count++;
} while (TRUE);
if (verbose)
g_print ("Writing %dx%d texture to %s\n",
gdk_texture_get_width (texture),
gdk_texture_get_height (texture),
filename);
if (!gdk_texture_save_to_png (texture, path))
{
g_printerr (_("Failed to write %s\n"), filename);
}
g_free (path);
g_free (filename);
texture_count++;
}
static void
extract_font (GskRenderNode *node)
{
PangoFont *font;
hb_font_t *hb_font;
hb_face_t *hb_face;
hb_blob_t *hb_blob;
const char *data;
unsigned int length;
char *filename;
char *path;
char *sum;
font = gsk_text_node_get_font (node);
hb_font = pango_font_get_hb_font (font);
hb_face = hb_font_get_face (hb_font);
hb_blob = hb_face_reference_blob (hb_face);
if (hb_blob == hb_blob_get_empty ())
{
hb_blob_destroy (hb_blob);
g_warning ("Failed to extract font data\n");
return;
}
data = hb_blob_get_data (hb_blob, &length);
sum = g_compute_checksum_for_data (G_CHECKSUM_SHA256, (const guchar *)data, length);
if (!fonts)
fonts = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
if (g_hash_table_contains (fonts, sum))
{
g_free (sum);
hb_blob_destroy (hb_blob);
return;
}
g_hash_table_add (fonts, sum);
do {
filename = g_strdup_printf ("gtk-font-%u.ttf", font_count);
path = g_build_path ("/", directory, filename, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
break;
g_free (path);
g_free (filename);
font_count++;
} while (TRUE);
if (verbose)
{
PangoFontDescription *desc;
desc = pango_font_describe (font);
g_print ("Writing font %s to %s\n",
pango_font_description_get_family (desc),
filename);
pango_font_description_free (desc);
}
if (!g_file_set_contents (path, data, length, NULL))
{
g_printerr (_("Failed to write %s\n"), filename);
}
hb_blob_destroy (hb_blob);
g_free (path);
g_free (filename);
font_count++;
}
#define N_NODE_TYPES (GSK_SUBSURFACE_NODE + 1)
static void
extract_from_node (GskRenderNode *node)
{
g_assert (gsk_render_node_get_node_type (node) < N_NODE_TYPES);
switch (gsk_render_node_get_node_type (node))
{
case GSK_CONTAINER_NODE:
for (unsigned int i = 0; i < gsk_container_node_get_n_children (node); i++)
extract_from_node (gsk_container_node_get_child (node, i));
break;
case GSK_CAIRO_NODE:
case GSK_COLOR_NODE:
case GSK_LINEAR_GRADIENT_NODE:
case GSK_REPEATING_LINEAR_GRADIENT_NODE:
case GSK_RADIAL_GRADIENT_NODE:
case GSK_REPEATING_RADIAL_GRADIENT_NODE:
case GSK_CONIC_GRADIENT_NODE:
case GSK_BORDER_NODE:
case GSK_INSET_SHADOW_NODE:
case GSK_OUTSET_SHADOW_NODE:
break;
case GSK_TEXTURE_NODE:
case GSK_TEXTURE_SCALE_NODE:
extract_texture (node);
break;
case GSK_TRANSFORM_NODE:
extract_from_node (gsk_transform_node_get_child (node));
break;
case GSK_OPACITY_NODE:
extract_from_node (gsk_opacity_node_get_child (node));
break;
case GSK_COLOR_MATRIX_NODE:
extract_from_node (gsk_color_matrix_node_get_child (node));
break;
case GSK_REPEAT_NODE:
extract_from_node (gsk_repeat_node_get_child (node));
break;
case GSK_CLIP_NODE:
extract_from_node (gsk_clip_node_get_child (node));
break;
case GSK_ROUNDED_CLIP_NODE:
extract_from_node (gsk_rounded_clip_node_get_child (node));
break;
case GSK_SHADOW_NODE:
extract_from_node (gsk_shadow_node_get_child (node));
break;
case GSK_BLEND_NODE:
extract_from_node (gsk_blend_node_get_bottom_child (node));
extract_from_node (gsk_blend_node_get_top_child (node));
break;
case GSK_CROSS_FADE_NODE:
extract_from_node (gsk_cross_fade_node_get_start_child (node));
extract_from_node (gsk_cross_fade_node_get_end_child (node));
break;
case GSK_TEXT_NODE:
extract_font (node);
break;
case GSK_BLUR_NODE:
extract_from_node (gsk_blur_node_get_child (node));
break;
case GSK_DEBUG_NODE:
extract_from_node (gsk_debug_node_get_child (node));
break;
case GSK_GL_SHADER_NODE:
for (unsigned int i = 0; i < gsk_gl_shader_node_get_n_children (node); i++)
extract_from_node (gsk_gl_shader_node_get_child (node, i));
break;
case GSK_MASK_NODE:
extract_from_node (gsk_mask_node_get_source (node));
extract_from_node (gsk_mask_node_get_mask (node));
break;
case GSK_FILL_NODE:
extract_from_node (gsk_fill_node_get_child (node));
break;
case GSK_STROKE_NODE:
extract_from_node (gsk_stroke_node_get_child (node));
break;
case GSK_SUBSURFACE_NODE:
extract_from_node (gsk_subsurface_node_get_child (node));
break;
case GSK_NOT_A_RENDER_NODE:
default:
g_assert_not_reached ();
}
}
static void
file_extract (const char *filename)
{
GskRenderNode *node;
node = load_node_file (filename);
extract_from_node (node);
gsk_render_node_unref (node);
}
void
do_extract (int *argc,
const char ***argv)
{
GOptionContext *context;
char **filenames = NULL;
const GOptionEntry entries[] = {
{ "dir", 0, 0, G_OPTION_ARG_FILENAME, &directory, N_("Directory to use"), N_("DIRECTORY") },
{ "verbose", 0, 0, G_OPTION_ARG_NONE, &verbose, N_("Be verbose"), NULL },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL, N_("FILE") },
{ NULL, }
};
GError *error = NULL;
g_set_prgname ("gtk4-rendernode-tool extract");
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, _("Extract data urls from the render node."));
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 (filenames == NULL)
{
g_printerr (_("No .node file specified\n"));
exit (1);
}
if (g_strv_length (filenames) > 1)
{
g_printerr (_("Can only accept a single .node file\n"));
exit (1);
}
if (directory == NULL)
directory = g_strdup (".");
file_extract (filenames[0]);
g_strfreev (filenames);
g_free (directory);
}