static gboolean
gdk_pixbuf__gdip_image_save_PNG_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
EncoderParameters encoder_params;
LONG compression = 5;
if (keys && *keys) {
gchar **kiter = keys;
gchar **viter = values;
while (*kiter) {
if (strncmp (*kiter, "tEXt::", 6) == 0) {
/* TODO: support exif data and the like */
}
else if (strcmp (*kiter, "compression") == 0) {
char *endptr = NULL;
compression = strtol (*viter, &endptr, 10);
if (endptr == *viter) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("PNG compression level must be a value between 0 and 9; value '%s' could not be parsed."),
*viter);
return FALSE;
}
if (compression < 0 || compression > 9) {
/* This is a user-visible error;
* lets people skip the range-checking
* in their app.
*/
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("PNG compression level must be a value between 0 and 9; value '%d' is not allowed."),
(int)compression);
return FALSE;
}
} else {
g_warning ("Unrecognized parameter (%s) passed to PNG saver.", *kiter);
}
++kiter;
++viter;
}
}
encoder_params.Count = 1;
encoder_params.Parameter[0].Guid = EncoderCompression;
encoder_params.Parameter[0].Type = EncoderParameterValueTypeLong;
encoder_params.Parameter[0].NumberOfValues = 1;
encoder_params.Parameter[0].Value = &compression;
return gdip_save_pixbuf (pixbuf, L"image/png", &encoder_params, save_func, user_data, error);
}
static gboolean
gdk_pixbuf__gdip_image_save_TIFF_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
return gdip_save_pixbuf (pixbuf, L"image/tiff", NULL, save_func, user_data, error);
}
static gboolean
gdk_pixbuf__gdip_image_save_JPEG_to_callback (GdkPixbufSaveFunc save_func,
gpointer user_data,
GdkPixbuf *pixbuf,
gchar **keys,
gchar **values,
GError **error)
{
EncoderParameters encoder_params;
LONG quality = 75; /* default; must be between 0 and 100 */
if (keys && *keys) {
gchar **kiter = keys;
gchar **viter = values;
while (*kiter) {
if (strcmp (*kiter, "quality") == 0) {
char *endptr = NULL;
quality = strtol (*viter, &endptr, 10);
if (endptr == *viter) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("JPEG quality must be a value between 0 and 100; value '%s' could not be parsed."),
*viter);
return FALSE;
}
if (quality < 0 ||
quality > 100) {
/* This is a user-visible error;
* lets people skip the range-checking
* in their app.
*/
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_BAD_OPTION,
_("JPEG quality must be a value between 0 and 100; value '%d' is not allowed."),
(int)quality);
return FALSE;
}
} else {
g_warning ("Unrecognized parameter (%s) passed to JPEG saver.", *kiter);
}
++kiter;
++viter;
}
}
encoder_params.Count = 1;
encoder_params.Parameter[0].Guid = EncoderQuality;
encoder_params.Parameter[0].Type = EncoderParameterValueTypeLong;
encoder_params.Parameter[0].NumberOfValues = 1;
encoder_params.Parameter[0].Value = &quality;
return gdip_save_pixbuf (pixbuf, L"image/jpeg", &encoder_params, save_func, user_data, error);
}
