static GeglRectangle
gegl_rgbe_load_get_bounding_box (GeglOperation *operation)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
GeglRectangle result = {0,0,0,0};
rgbe_file *file;
guint width, height;
gegl_operation_set_format (operation,
"output",
babl_format (FORMAT));
file = rgbe_load_path (o->path);
if (!file)
goto cleanup;
if (!rgbe_get_size (file, &width, &height))
goto cleanup;
result.width = width;
result.height = height;
cleanup:
rgbe_file_free (file);
return result;
}
static rgbe_file*
rgbe_file_new (const gchar *path)
{
rgbe_file *file;
g_return_val_if_fail (path, NULL);
file = g_new (rgbe_file, 1);
if (!rgbe_file_init (file, path))
{
rgbe_file_free (file);
file = NULL;
}
return file;
}
rgbe_file *
rgbe_load_path (const gchar *path)
{
gboolean success = FALSE;
rgbe_file *file;
file = rgbe_file_new (path);
if (!file)
goto cleanup;
if (!rgbe_header_read (file))
goto cleanup;
success = TRUE;
cleanup:
if (!success)
{
rgbe_file_free (file);
file = NULL;
}
return file;
}
static gboolean
gegl_rgbe_load_process (GeglOperation *operation,
GeglBuffer *output,
const GeglRectangle *result,
gint level)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
gboolean success = FALSE;
gfloat *pixels = NULL;
rgbe_file *file;
guint width, height;
file = rgbe_load_path (o->path);
if (!file)
goto cleanup;
if (!rgbe_get_size (file, &width, &height))
goto cleanup;
if (width != result->width ||
height != result->height)
goto cleanup;
pixels = rgbe_read_scanlines (file);
if (!pixels)
goto cleanup;
gegl_buffer_set (output, result, 0, babl_format (FORMAT), pixels,
GEGL_AUTO_ROWSTRIDE);
success = TRUE;
cleanup:
g_free (pixels);
rgbe_file_free (file);
return success;
}
