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DisplayConfig: add the write side of the API

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Implement ApplyConfiguration in terms of XRandR calls.
Error checking is done before actually committing the configuration.

If mutter is using one of the other monitor config backends, an
error is reported and nothing happens.

https://bugzilla.gnome.org/show_bug.cgi?id=705670
This commit is contained in:
Giovanni Campagna 2013-07-22 13:31:10 +02:00 committed by Giovanni Campagna
parent dc242e46c2
commit 57d083730e
3 changed files with 388 additions and 6 deletions
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3
src/core/monitor-private.h
View File

@ -94,6 +94,9 @@ struct _MetaCRTC
from the HW one
*/
MetaMonitorInfo *logical_monitor;
/* Used when changing configuration */
gboolean is_dirty;
};
struct _MetaMonitorMode

384
src/core/monitor.c
View File

@ -37,20 +37,45 @@
#include <meta/main.h>
#include <meta/util.h>
#include <meta/errors.h>
#include "monitor-private.h"
#include "meta-dbus-xrandr.h"
#ifndef HAVE_WAYLAND
enum wl_output_transform {
WL_OUTPUT_TRANSFORM_NORMAL,
WL_OUTPUT_TRANSFORM_90,
WL_OUTPUT_TRANSFORM_180,
WL_OUTPUT_TRANSFORM_270,
WL_OUTPUT_TRANSFORM_FLIPPED,
WL_OUTPUT_TRANSFORM_FLIPPED_90,
WL_OUTPUT_TRANSFORM_FLIPPED_180,
WL_OUTPUT_TRANSFORM_FLIPPED_270
};
#endif
typedef enum {
META_BACKEND_DUMMY,
META_BACKEND_XRANDR,
META_BACKEND_COGL
} MetaBackend;
struct _MetaMonitorManager
{
GObject parent_instance;
MetaBackend backend;
/* XXX: this structure is very badly
packed, but I like the logical organization
of fields */
unsigned int serial;
int max_screen_width;
int max_screen_height;
/* Outputs refer to physical screens,
CRTCs refer to stuff that can drive outputs
(like encoders, but less tied to the HW),
@ -73,6 +98,8 @@ struct _MetaMonitorManager
#ifdef HAVE_RANDR
Display *xdisplay;
XRRScreenResources *resources;
int time;
#endif
int dbus_name_id;
@ -96,6 +123,8 @@ G_DEFINE_TYPE (MetaMonitorManager, meta_monitor_manager, G_TYPE_OBJECT);
static void
make_dummy_monitor_config (MetaMonitorManager *manager)
{
manager->backend = META_BACKEND_DUMMY;
manager->modes = g_new0 (MetaMonitorMode, 1);
manager->n_modes = 1;
@ -124,6 +153,8 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
manager->crtcs[0].rect.width = manager->modes[0].width;
manager->crtcs[0].rect.height = manager->modes[0].height;
manager->crtcs[0].current_mode = &manager->modes[0];
manager->crtcs[0].is_dirty = FALSE;
manager->crtcs[0].logical_monitor = NULL;
manager->outputs = g_new0 (MetaOutput, 1);
manager->n_outputs = 1;
@ -146,6 +177,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
manager->outputs[0].possible_crtcs[0] = &manager->crtcs[0];
manager->outputs[0].n_possible_clones = 0;
manager->outputs[0].possible_clones = g_new0 (MetaOutput *, 0);
manager->max_screen_width = manager->modes[0].width;
manager->max_screen_height = manager->modes[0].height;
}
#ifdef HAVE_RANDR
@ -157,12 +191,26 @@ read_monitor_infos_from_xrandr (MetaMonitorManager *manager)
RROutput primary_output;
unsigned int i, j, k;
unsigned int n_actual_outputs;
int min_width, min_height;
if (manager->resources)
XRRFreeScreenResources (manager->resources);
manager->resources = NULL;
XRRGetScreenSizeRange (manager->xdisplay, DefaultRootWindow (manager->xdisplay),
&min_width,
&min_height,
&manager->max_screen_width,
&manager->max_screen_height);
resources = XRRGetScreenResourcesCurrent (manager->xdisplay,
DefaultRootWindow (manager->xdisplay));
if (!resources)
return make_dummy_monitor_config (manager);
manager->backend = META_BACKEND_XRANDR;
manager->resources = resources;
manager->time = resources->configTimestamp;
manager->n_outputs = resources->noutput;
manager->n_crtcs = resources->ncrtc;
manager->n_modes = resources->nmode;
@ -198,6 +246,7 @@ read_monitor_infos_from_xrandr (MetaMonitorManager *manager)
meta_crtc->rect.y = crtc->y;
meta_crtc->rect.width = crtc->width;
meta_crtc->rect.height = crtc->height;
meta_crtc->is_dirty = FALSE;
for (j = 0; j < (unsigned)resources->nmode; j++)
{
@ -318,8 +367,6 @@ read_monitor_infos_from_xrandr (MetaMonitorManager *manager)
}
}
}
XRRFreeScreenResources (resources);
}
#endif
@ -689,9 +736,334 @@ handle_get_resources (MetaDBusDisplayConfig *skeleton,
manager->serial,
g_variant_builder_end (&crtc_builder),
g_variant_builder_end (&output_builder),
g_variant_builder_end (&mode_builder));
return FALSE;
}
g_variant_builder_end (&mode_builder),
manager->max_screen_width,
manager->max_screen_height);
return TRUE;
}
static gboolean
output_can_config (MetaOutput *output,
MetaCRTC *crtc,
MetaMonitorMode *mode)
{
unsigned int i;
gboolean ok = FALSE;
for (i = 0; i < output->n_possible_crtcs && !ok; i++)
ok = output->possible_crtcs[i] == crtc;
if (!ok)
return FALSE;
if (mode == NULL)
return TRUE;
ok = FALSE;
for (i = 0; i < output->n_modes && !ok; i++)
ok = output->modes[i] == mode;
return ok;
}
static gboolean
output_can_clone (MetaOutput *output,
MetaOutput *clone)
{
unsigned int i;
gboolean ok = FALSE;
for (i = 0; i < output->n_possible_clones && !ok; i++)
ok = output->possible_clones[i] == clone;
return ok;
}
#ifdef HAVE_RANDR
static Rotation
wl_transform_to_xrandr (enum wl_output_transform transform)
{
switch (transform)
{
case WL_OUTPUT_TRANSFORM_NORMAL:
return RR_Rotate_0;
case WL_OUTPUT_TRANSFORM_90:
return RR_Rotate_90;
case WL_OUTPUT_TRANSFORM_180:
return RR_Rotate_180;
case WL_OUTPUT_TRANSFORM_270:
return RR_Rotate_270;
case WL_OUTPUT_TRANSFORM_FLIPPED:
return RR_Reflect_X | RR_Rotate_0;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
return RR_Reflect_X | RR_Rotate_90;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
return RR_Reflect_X | RR_Rotate_180;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
return RR_Reflect_X | RR_Rotate_270;
}
g_assert_not_reached ();
}
static void
apply_config_xrandr (MetaMonitorManager *manager,
GVariantIter *crtcs,
GVariantIter *outputs)
{
GVariant *nested_outputs, *properties;
guint crtc_id, output_id, transform;
int new_mode, x, y;
unsigned i;
while (g_variant_iter_loop (crtcs, "(uiiiu@aua{sv})",
&crtc_id, &new_mode, &x, &y,
&transform, &nested_outputs, NULL))
{
MetaCRTC *crtc = &manager->crtcs[crtc_id];
crtc->is_dirty = TRUE;
if (new_mode == -1)
{
XRRSetCrtcConfig (manager->xdisplay,
manager->resources,
(XID)crtc->crtc_id,
manager->time,
0, 0,
None,
RR_Rotate_0,
NULL, 0);
}
else
{
MetaMonitorMode *mode;
XID *outputs;
int i, n_outputs;
guint output_id;
Status ok;
mode = &manager->modes[new_mode];
n_outputs = g_variant_n_children (nested_outputs);
outputs = g_new (XID, n_outputs);
for (i = 0; i < n_outputs; i++)
{
g_variant_get_child (nested_outputs, i, "u", &output_id);
outputs[i] = manager->outputs[output_id].output_id;
}
meta_error_trap_push (meta_get_display ());
ok = XRRSetCrtcConfig (manager->xdisplay,
manager->resources,
(XID)crtc->crtc_id,
manager->time,
x, y,
(XID)mode->mode_id,
wl_transform_to_xrandr (transform),
outputs, n_outputs);
meta_error_trap_pop (meta_get_display ());
if (ok != Success)
meta_warning ("Configuring CRTC %d with mode %d (%d x %d @ %f) at position %d, %d and transfrom %u failed\n",
(unsigned)(crtc->crtc_id), (unsigned)(mode->mode_id),
mode->width, mode->height, (float)mode->refresh_rate, x, y, transform);
g_free (outputs);
}
}
while (g_variant_iter_loop (outputs, "(u@a{sv})",
&output_id, &properties))
{
gboolean primary;
if (g_variant_lookup (properties, "primary", "b", &primary) && primary)
{
MetaOutput *output = &manager->outputs[output_id];
XRRSetOutputPrimary (manager->xdisplay,
DefaultRootWindow (manager->xdisplay),
(XID)output->output_id);
}
}
/* Disable CRTCs not mentioned in the list */
for (i = 0; i < manager->n_crtcs; i++)
{
MetaCRTC *crtc = &manager->crtcs[i];
if (crtc->is_dirty)
continue;
if (crtc->current_mode == NULL)
continue;
XRRSetCrtcConfig (manager->xdisplay,
manager->resources,
(XID)crtc->crtc_id,
manager->time,
0, 0,
None,
RR_Rotate_0,
NULL, 0);
}
}
#endif
static gboolean
handle_apply_configuration (MetaDBusDisplayConfig *skeleton,
GDBusMethodInvocation *invocation,
guint serial,
gboolean persistent,
GVariant *crtcs,
GVariant *outputs,
MetaMonitorManager *manager)
{
GVariantIter crtc_iter, output_iter, *nested_outputs;
guint crtc_id;
int new_mode, x, y;
guint transform;
guint output_id;
if (serial != manager->serial)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_ACCESS_DENIED,
"The requested configuration is based on stale information");
return TRUE;
}
if (persistent)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_NOT_SUPPORTED,
"Persistent configuration is not yet implemented");
return TRUE;
}
if (manager->backend != META_BACKEND_XRANDR)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_NOT_SUPPORTED,
"Changing configuration is not supported by the backend");
return TRUE;
}
/* Validate all arguments */
g_variant_iter_init (&crtc_iter, crtcs);
while (g_variant_iter_loop (&crtc_iter, "(uiiiuaua{sv})",
&crtc_id, &new_mode, &x, &y, &transform,
&nested_outputs, NULL))
{
MetaOutput *first_output;
MetaCRTC *crtc;
MetaMonitorMode *mode;
guint output_id;
if (crtc_id >= manager->n_crtcs)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid CRTC id");
return TRUE;
}
crtc = &manager->crtcs[crtc_id];
if (new_mode != -1 && (new_mode < 0 || (unsigned)new_mode >= manager->n_modes))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid mode id");
return TRUE;
}
mode = new_mode != -1 ? &manager->modes[new_mode] : NULL;
if (mode &&
(x < 0 ||
x + mode->width > manager->max_screen_width ||
y < 0 ||
y + mode->height > manager->max_screen_height))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid CRTC geometry");
return TRUE;
}
if (transform < WL_OUTPUT_TRANSFORM_NORMAL ||
transform > WL_OUTPUT_TRANSFORM_FLIPPED_270)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid transform");
return TRUE;
}
first_output = NULL;
while (g_variant_iter_loop (nested_outputs, "u", &output_id))
{
MetaOutput *output;
if (output_id >= manager->n_outputs)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid output id");
return TRUE;
}
output = &manager->outputs[output_id];
if (!output_can_config (output, crtc, mode))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Output cannot be assigned to this CRTC or mode");
return TRUE;
}
if (first_output)
{
if (!output_can_clone (output, first_output))
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Outputs cannot be cloned");
return TRUE;
}
}
else
first_output = output;
}
if (!first_output && mode)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Mode specified without outputs?");
return TRUE;
}
}
g_variant_iter_init (&output_iter, outputs);
while (g_variant_iter_loop (&output_iter, "(ua{sv})", &output_id, NULL))
{
if (output_id >= manager->n_outputs)
{
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
G_DBUS_ERROR_INVALID_ARGS,
"Invalid output id");
return TRUE;
}
}
g_variant_iter_init (&crtc_iter, crtcs);
g_variant_iter_init (&output_iter, outputs);
apply_config_xrandr (manager, &crtc_iter, &output_iter);
meta_dbus_display_config_complete_apply_configuration (skeleton, invocation);
return TRUE;
}
static void
on_bus_acquired (GDBusConnection *connection,
@ -704,6 +1076,8 @@ on_bus_acquired (GDBusConnection *connection,
g_signal_connect_object (manager->skeleton, "handle-get-resources",
G_CALLBACK (handle_get_resources), manager, 0);
g_signal_connect_object (manager->skeleton, "handle-apply-configuration",
G_CALLBACK (handle_apply_configuration), manager, 0);
g_dbus_interface_skeleton_export (G_DBUS_INTERFACE_SKELETON (manager->skeleton),
connection,

7
src/xrandr.xml
View File

@ -18,6 +18,8 @@
@crtcs: available CRTCs
@outputs: available outputs
@modes: available modes
@max_screen_width:
@max_screen_height:
Retrieves the current layout of the hardware.
@ -130,6 +132,8 @@
<arg name="crtcs" direction="out" type="a(uxiiiiiuaua{sv})" />
<arg name="outputs" direction="out" type="a(uxiausauaua{sv})" />
<arg name="modes" direction="out" type="a(uxuud)" />
<arg name="max_screen_width" direction="out" type="i" />
<arg name="max_screen_height" direction="out" type="i" />
</method>
<!--
@ -155,6 +159,7 @@
- i x, y: the new coordinates of the top left corner
the geometry will be completed with the size information
from @new_mode
- u transform: the desired transform
- au outputs: the API ID of outputs that should be assigned to
this CRTC
- a{sv} properties: properties whose value should be changed
@ -186,7 +191,7 @@
<method name="ApplyConfiguration">
<arg name="serial" direction="in" type="u" />
<arg name="persistent" direction="in" type="b" />
<arg name="crtcs" direction="in" type="a(uiiiaua{sv})" />
<arg name="crtcs" direction="in" type="a(uiiiuaua{sv})" />
<arg name="outputs" direction="in" type="a(ua{sv})" />
</method>
</interface>