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fix(xbacklight): Allow larger property values

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Not all backlight values are within 8 bit range
so do not truncate property values
This commit is contained in:
Michael Carlberg 2016-10-25 16:39:50 +02:00
parent ee92c30ff4
commit 83ae9f6435
2 changed files with 11 additions and 10 deletions
include/components/x11
randr.hpp

19
include/components/x11/randr.hpp
View file

@ -74,28 +74,29 @@ namespace randr_util {
inline void get_backlight_range(connection& conn, const monitor_t& mon, backlight_values& dst) {
auto reply = conn.query_output_property(mon->randr_output, Backlight);
dst.min = 0;
dst.max = 0;
if (!reply->range || reply->length != 2)
reply = conn.query_output_property(mon->randr_output, BACKLIGHT);
if (!reply->range || reply->length != 2)
return;
auto range = reply.valid_values().begin();
dst.min = *range++;
dst.max = *range;
dst.min = static_cast<uint32_t>(*range++);
dst.max = static_cast<uint32_t>(*range);
}
inline void get_backlight_value(connection& conn, const monitor_t& mon, backlight_values& dst) {
auto reply = conn.get_output_property(mon->randr_output, Backlight, XCB_ATOM_NONE, 0, 4, 0, 0);
if (!reply->num_items)
if (reply->num_items != 1 || reply->format != 32 || reply->type != XCB_ATOM_INTEGER)
reply = conn.get_output_property(mon->randr_output, BACKLIGHT, XCB_ATOM_NONE, 0, 4, 0, 0);
if(!reply->num_items)
return;
dst.val = *reply.data().begin();
if (reply->num_items == 1 && reply->format == 32 && reply->type == XCB_ATOM_INTEGER)
dst.val = *reinterpret_cast<uint32_t*>(xcb_randr_get_output_property_data(reply.get().get()));
else
dst.val = 0;
}
}