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/*
* Copyright (C) 2011 Red Hat, Inc.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* The Sushi project hereby grant permission for non-gpl compatible GStreamer
* plugins to be used and distributed together with GStreamer and Sushi. This
* permission is above and beyond the permissions granted by the GPL license
* Sushi is covered by.
*
* Authors: Cosimo Cecchi <cosimoc@redhat.com>
*
*/
#include "sushi-font-loader.h"
#include <stdlib.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include <gio/gio.h>
typedef struct {
FT_Library library;
FT_Long face_index;
GFile *file;
GSimpleAsyncResult *result;
gchar *face_contents;
gsize face_length;
} FontLoadJob;
static FontLoadJob *
font_load_job_new (FT_Library library,
const gchar *uri,
GAsyncReadyCallback callback,
gpointer user_data)
{
FontLoadJob *job = g_slice_new0 (FontLoadJob);
job->library = library;
job->face_index = 0;
job->file = g_file_new_for_uri (uri);
job->result = g_simple_async_result_new
(NULL, callback, user_data,
sushi_new_ft_face_from_uri_async);
g_simple_async_result_set_op_res_gpointer (job->result, job, NULL);
return job;
}
static void
font_load_job_free (FontLoadJob *job)
{
g_clear_object (&job->result);
g_clear_object (&job->file);
g_slice_free (FontLoadJob, job);
}
static FT_Face
create_face_from_contents (FontLoadJob *job,
gchar **contents,
GError **error)
{
FT_Error ft_error;
FT_Face retval;
ft_error = FT_New_Memory_Face (job->library,
(const FT_Byte *) job->face_contents,
(FT_Long) job->face_length,
job->face_index,
&retval);
if (ft_error != 0) {
gchar *uri;
uri = g_file_get_uri (job->file);
g_set_error (error, G_IO_ERROR, 0,
"Unable to read the font face file '%s'", uri);
retval = NULL;
g_free (job->face_contents);
g_free (uri);
} else {
*contents = job->face_contents;
}
return retval;
}
static gboolean
font_load_job_callback (gpointer user_data)
{
FontLoadJob *job = user_data;
g_simple_async_result_complete (job->result);
font_load_job_free (job);
return FALSE;
}
static void
font_load_job_do_load (FontLoadJob *job,
GError **error)
{
gchar *contents;
gsize length;
g_file_load_contents (job->file, NULL,
&contents, &length, NULL, error);
if ((error != NULL) && (*error == NULL)) {
job->face_contents = contents;
job->face_length = length;
}
}
static gboolean
font_load_job (GIOSchedulerJob *sched_job,
GCancellable *cancellable,
gpointer user_data)
{
FontLoadJob *job = user_data;
GError *error = NULL;
font_load_job_do_load (job, &error);
if (error != NULL)
g_simple_async_result_take_error (job->result, error);
g_io_scheduler_job_send_to_mainloop_async (sched_job,
font_load_job_callback,
job, NULL);
return FALSE;
}
/**
* sushi_new_ft_face_from_uri: (skip)
*
*/
FT_Face
sushi_new_ft_face_from_uri (FT_Library library,
const gchar *uri,
gchar **contents,
GError **error)
{
FontLoadJob *job = NULL;
FT_Face face;
job = font_load_job_new (library, uri, NULL, NULL);
font_load_job_do_load (job, error);
if ((error != NULL) && (*error != NULL)) {
font_load_job_free (job);
return NULL;
}
face = create_face_from_contents (job, contents, error);
font_load_job_free (job);
return face;
}
/**
* sushi_new_ft_face_from_uri_async: (skip)
*
*/
void
sushi_new_ft_face_from_uri_async (FT_Library library,
const gchar *uri,
GAsyncReadyCallback callback,
gpointer user_data)
{
FontLoadJob *job = font_load_job_new (library, uri, callback, user_data);
g_io_scheduler_push_job (font_load_job,
job, NULL,
G_PRIORITY_DEFAULT,
NULL);
}
/**
* sushi_new_ft_face_from_uri_finish: (skip)
*
*/
FT_Face
sushi_new_ft_face_from_uri_finish (GAsyncResult *result,
gchar **contents,
GError **error)
{
FontLoadJob *job;
if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
error))
return NULL;
job = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (result));
return create_face_from_contents (job, contents, error);
}
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