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diff --git a/contrib/japanese/gdev10v.c b/contrib/japanese/gdev10v.c
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index 5c8b7fb..53da0ec 100644
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--- a/contrib/japanese/gdev10v.c
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+++ b/contrib/japanese/gdev10v.c
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@@ -73,8 +73,20 @@ gx_device_procs prn_bj10v_procs =
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prn_matrix_procs(gdev_prn_open, bj10v_get_initial_matrix,
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gdev_prn_output_page, gdev_prn_close);
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#endif
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+
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+static int
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+bj10v_open(gx_device * pdev)
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+{
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+ if (pdev->HWResolution[0] < 180 ||
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+ pdev->HWResolution[1] < 180)
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+ {
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+ emprintf(pdev->memory, "device requires a resolution of at least 180dpi\n");
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+ return_error(gs_error_rangecheck);
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+ }
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+ return gdev_prn_open(pdev);
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+}
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gx_device_procs prn_bj10v_procs =
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- prn_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close);
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+ prn_procs(bj10v_open, gdev_prn_output_page, gdev_prn_close);
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gx_device_printer gs_bj10v_device =
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prn_device(prn_bj10v_procs, "bj10v",
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diff --git a/contrib/japanese/gdevalps.c b/contrib/japanese/gdevalps.c
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index f29aeb1..d4de619 100644
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--- a/contrib/japanese/gdevalps.c
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+++ b/contrib/japanese/gdevalps.c
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@@ -155,13 +155,20 @@ static const char end_md[] = {
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static int
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md_open(gx_device *pdev)
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{
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- static const float md_margins[4] =
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- { MD_SIDE_MARGIN, MD_BOTTOM_MARGIN,
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- MD_SIDE_MARGIN, MD_TOP_MARGIN
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- };
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-
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- gx_device_set_margins(pdev, md_margins, true);
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- return gdev_prn_open(pdev);
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+ static const float md_margins[4] =
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+ {
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+ MD_SIDE_MARGIN, MD_BOTTOM_MARGIN,
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+ MD_SIDE_MARGIN, MD_TOP_MARGIN
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+ };
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+
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+ if (pdev->HWResolution[0] != 600)
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+ {
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+ emprintf(pdev->memory, "device must have an X resolution of 600dpi\n");
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+ return_error(gs_error_rangecheck);
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+ }
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+
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+ gx_device_set_margins(pdev, md_margins, true);
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+ return gdev_prn_open(pdev);
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}
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/* MD5000 monochrome mode entrance. */
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