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Add support for rudimentary fractional scaling

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When the logical layout mode is used, allow configuring the scaling to
be non-integer. Supported scales are so far hard coded to include at
most 1, 1.5 and 2, and scales that doesn't result in non-fractional
logical monitor sizes are discarded.

Wayland outputs are set to have scale ceil(actual_scale) meaning well
behaving Wayland clients will provide buffers with buffer scale 2, thus
being scaled down to the fractional scale.

https://bugzilla.gnome.org/show_bug.cgi?id=765011
This commit is contained in:
Jonas Ådahl
2017-05-25 17:20:59 +08:00
parent b64c69e4bc
commit 10b0351a59
12 changed files with 126 additions and 59 deletions
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8
src/tests/monitor-store-unit-tests.c
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@ -51,7 +51,7 @@ typedef struct _MonitorTestCaseMonitor
typedef struct _MonitorTestCaseLogicalMonitor
{
MetaRectangle layout;
int scale;
float scale;
MetaMonitorTransform transform;
gboolean is_primary;
gboolean is_presentation;
@ -141,9 +141,9 @@ check_monitor_configuration (MetaMonitorConfigStore *config_store,
g_assert (meta_rectangle_equal (&logical_monitor_config->layout,
&config_expect->logical_monitors[i].layout));
g_assert_cmpint (logical_monitor_config->scale,
==,
config_expect->logical_monitors[i].scale);
g_assert_cmpfloat (logical_monitor_config->scale,
==,
config_expect->logical_monitors[i].scale);
g_assert_cmpint (logical_monitor_config->transform,
==,
config_expect->logical_monitors[i].transform);