gtk/tests/showrendernode.c
2022-12-13 13:46:02 -05:00

293 lines
7.9 KiB
C

#include <gtk/gtk.h>
static char *write_to_filename = NULL;
static gboolean compare_node;
static GOptionEntry options[] = {
{ "write", 'o', 0, G_OPTION_ARG_STRING, &write_to_filename, "Write PNG file", NULL },
{ "compare", 'c', 0, G_OPTION_ARG_NONE, &compare_node, "Compare render to render_texture", NULL },
{ NULL }
};
typedef struct _GtkNodeView GtkNodeView;
typedef struct _GtkNodeViewClass GtkNodeViewClass;
#define GTK_TYPE_NODE_VIEW (gtk_node_view_get_type ())
#define GTK_NODE_VIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST(obj, GTK_TYPE_NODE_VIEW, GtkNodeView))
#define GTK_NODE_VIEW_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST(cls, GTK_TYPE_NODE_VIEW, GtkNodeViewClass))
struct _GtkNodeView
{
GtkWidget parent_instance;
GskRenderNode *node;
GFileMonitor *file_monitor;
};
struct _GtkNodeViewClass
{
GtkWidgetClass parent_class;
};
GType gtk_node_view_get_type (void) G_GNUC_CONST;
G_DEFINE_TYPE(GtkNodeView, gtk_node_view, GTK_TYPE_WIDGET)
static void
deserialize_error_func (const GskParseLocation *start,
const GskParseLocation *end,
const GError *error,
gpointer user_data)
{
GString *string = g_string_new ("<data>");
g_string_append_printf (string, ":%zu:%zu",
start->lines + 1, start->line_chars + 1);
if (start->lines != end->lines || start->line_chars != end->line_chars)
{
g_string_append (string, "-");
if (start->lines != end->lines)
g_string_append_printf (string, "%zu:", end->lines + 1);
g_string_append_printf (string, "%zu", end->line_chars + 1);
}
g_warning ("Error at %s: %s", string->str, error->message);
g_string_free (string, TRUE);
}
static void
load_file_contents (GtkNodeView *self,
GFile *file)
{
GBytes *bytes;
GError *error = NULL;
bytes = g_file_load_bytes (file, NULL, NULL, NULL);
if (bytes == NULL)
return;
if (!g_utf8_validate (g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes), NULL))
{
g_bytes_unref (bytes);
return;
}
self->node = gsk_render_node_deserialize (bytes, deserialize_error_func, &error);
if (error)
{
g_critical ("Invalid node file: %s", error->message);
g_clear_error (&error);
return;
}
gtk_widget_queue_draw (GTK_WIDGET (self));
g_bytes_unref (bytes);
}
static void
file_changed_cb (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
GtkNodeView *self = user_data;
if (event_type == G_FILE_MONITOR_EVENT_CHANGED)
load_file_contents (self, file);
}
static void
gtk_node_view_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkNodeView *self = GTK_NODE_VIEW (widget);
graphene_rect_t bounds;
if (self->node == NULL)
return;
gsk_render_node_get_bounds (self->node, &bounds);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum = *natural = bounds.origin.x + bounds.size.width;
}
else /* VERTICAL */
{
*minimum = *natural = bounds.origin.y + bounds.size.height;
}
}
static void
gtk_node_view_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkNodeView *self = GTK_NODE_VIEW (widget);
if (self->node != NULL)
gtk_snapshot_append_node (snapshot, self->node);
}
static void
gtk_node_view_finalize (GObject *object)
{
GtkNodeView *self = GTK_NODE_VIEW (object);
if (self->node)
gsk_render_node_unref (self->node);
G_OBJECT_CLASS (gtk_node_view_parent_class)->finalize (object);
}
static void
gtk_node_view_init (GtkNodeView *self)
{
gtk_widget_set_overflow (GTK_WIDGET (self), GTK_OVERFLOW_HIDDEN);
}
static void
gtk_node_view_class_init (GtkNodeViewClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = gtk_node_view_finalize;
widget_class->measure = gtk_node_view_measure;
widget_class->snapshot = gtk_node_view_snapshot;
}
static void
quit_cb (GtkWidget *widget,
gpointer data)
{
gboolean *done = data;
*done = TRUE;
g_main_context_wakeup (NULL);
}
int
main (int argc, char **argv)
{
GtkWidget *window;
GtkWidget *nodeview;
graphene_rect_t node_bounds;
GOptionContext *option_context;
GError *error = NULL;
gboolean done = FALSE;
GFile *file;
option_context = g_option_context_new ("NODE-FILE [-o OUTPUT] [--compare]");
g_option_context_add_main_entries (option_context, options, NULL);
if (argc < 2)
{
printf ("Usage: showrendernode NODEFILE [-o OUTPUT] [--compare]\n");
return 0;
}
if (!g_option_context_parse (option_context, &argc, &argv, &error))
{
g_printerr ("Option parsing failed: %s\n", error->message);
return 1;
}
g_option_context_free (option_context);
option_context = NULL;
g_message ("Compare: %d, write to filename: %s", compare_node, write_to_filename);
gtk_init ();
window = gtk_window_new ();
nodeview = g_object_new (GTK_TYPE_NODE_VIEW, NULL);
gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
file = g_file_new_for_path (argv[1]);
load_file_contents (GTK_NODE_VIEW (nodeview), file);
GTK_NODE_VIEW (nodeview)->file_monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, &error);
g_object_unref (file);
if (error)
{
g_warning ("%s", error->message);
return -1;
}
g_signal_connect (GTK_NODE_VIEW (nodeview)->file_monitor,
"changed", G_CALLBACK (file_changed_cb), nodeview);
if (write_to_filename != NULL)
{
GdkSurface *surface = gdk_surface_new_toplevel (gdk_display_get_default());
GskRenderer *renderer = gsk_renderer_new_for_surface (surface);
GdkTexture *texture = gsk_renderer_render_texture (renderer, GTK_NODE_VIEW (nodeview)->node, NULL);
g_message ("Writing .node file to .png using %s", G_OBJECT_TYPE_NAME (renderer));
g_assert (texture != NULL);
gdk_texture_save_to_png (texture, write_to_filename);
gsk_renderer_unrealize (renderer);
g_object_unref (texture);
g_object_unref (renderer);
g_object_unref (surface);
}
if (compare_node)
{
GtkWidget *box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
GdkSurface *gdk_surface = gdk_surface_new_toplevel (gdk_display_get_default());
GskRenderer *renderer = gsk_renderer_new_for_surface (gdk_surface);
GdkTexture *texture = gsk_renderer_render_texture (renderer, GTK_NODE_VIEW (nodeview)->node, NULL);
GtkWidget *image = gtk_image_new_from_paintable (GDK_PAINTABLE (texture));
gtk_widget_set_size_request (image,
gdk_texture_get_width (texture),
gdk_texture_get_height (texture));
gtk_box_append (GTK_BOX (box), nodeview);
gtk_box_append (GTK_BOX (box), image);
gtk_window_set_child (GTK_WINDOW (window), box);
gsk_renderer_unrealize (renderer);
g_object_unref (texture);
g_object_unref (renderer);
g_object_unref (gdk_surface);
}
else
{
gtk_window_set_child (GTK_WINDOW (window), nodeview);
}
gsk_render_node_get_bounds (GTK_NODE_VIEW (nodeview)->node, &node_bounds);
gtk_window_set_default_size (GTK_WINDOW (window),
MAX (600, node_bounds.size.width),
MAX (500, node_bounds.size.height));
g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
gtk_window_present (GTK_WINDOW (window));
while (!done)
g_main_context_iteration (NULL, TRUE);
return 0;
}