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d.rast.arrow: Use new D_open_driver() return value to constrain rendering #3492

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d.rast.arrow: Use new D_open_driver() return value to constrain rendering #3492

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8 changes: 7 additions & 1 deletion display/d.rast.arrow/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -220,7 +220,13 @@ int main(int argc, char **argv)
G_warning(_("Scale option requires magnitude_map"));

/* Setup driver and check important information */
D_open_driver();
if (D_open_driver() == -1) {
/* don't render the entire raster region; this module will be rerun by
* the monitor with the display extent (D_open_driver() will return 0
* then) and use that information to constrain rendering */
D_close_driver();
exit(EXIT_SUCCESS);
}

D_setup(0);

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