* Using a small tree-depth of 4.

    Because MagickQuantizeImage() was very slow.
    http://sourceforge.jp/ticket/browse.php?group_id=1608&tid=25892

diff --git a/src/chxj_img_conv_format.c b/src/chxj_img_conv_format.c
index a678bb6..db7fa06 100644 (file)
--- a/src/chxj_img_conv_format.c
+++ b/src/chxj_img_conv_format.c
@@ -1428,7 +1428,7 @@ s_fixup_color(MagickWand *magick_wand, request_rec *r, device_table *spec, img_c
     if (MagickQuantizeImage(magick_wand,
                            spec->color,
                            RGBColorspace,
-                           0,
+                           4, /* tree depth of 4 */
                            1,
                            0) == MagickFalse) {
       EXIT_MAGICK_ERROR();
@@ -1444,7 +1444,7 @@ s_fixup_color(MagickWand *magick_wand, request_rec *r, device_table *spec, img_c
     if (MagickQuantizeImage(magick_wand,
                            spec->color,
                            GRAYColorspace,
-                           0,
+                           4, /* tree depth of 4 */
                            1,
                            0) == MagickFalse) {
       EXIT_MAGICK_ERROR();