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mutter/src/backends/meta-monitor-manager-dummy.c
Jonas Ådahl 8163ca6821 Add support for scaled logical monitor framebuffers 
This commit adds support for rendering onto enlarged per logical
monitor framebuffers, using the scaled clutter stage views, for HiDPI
enabled logical monitors.

This works by scaling the mode of the monitors in a logical monitors by
the scale, no longer relying on scaling the window actors and window
geometry for making windows have the correct size on HiDPI monitors.

It is disabled by default, as in automatically created configurations
will still use the old mode. This is partly because Xwayland clients
will not yet work good enough to make it feasible.

To enable, add the 'scale-monitor-framebuffer' keyword to the
org.gnome.mutter.experimental-features gsettings array.

It is still possible to specify the mode via the new D-Bus API, which
has been adapted.

The adaptations to the D-Bus API means the caller need to be aware of
how to position logical monitors on the stage grid. This depends on the
'layout-mode' property that is used (see the DisplayConfig D-Bus
documentation).

https://bugzilla.gnome.org/show_bug.cgi?id=777732
2017-04-07 22:30:48 +08:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2001, 2002 Havoc Pennington
* Copyright (C) 2002, 2003 Red Hat Inc.
* Some ICCCM manager selection code derived from fvwm2,
* Copyright (C) 2001 Dominik Vogt, Matthias Clasen, and fvwm2 team
* Copyright (C) 2003 Rob Adams
* Copyright (C) 2004-2006 Elijah Newren
* Copyright (C) 2013 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "meta-monitor-manager-dummy.h"
#include <stdlib.h>
#include <meta/util.h>
#include "backends/meta-backend-private.h"
#include "backends/meta-monitor-config-manager.h"
#define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
#define MAX_MONITORS 5
#define MAX_OUTPUTS (MAX_MONITORS * 2)
#define MAX_CRTCS (MAX_MONITORS * 2)
#define MAX_MODES (MAX_MONITORS * 4)
static float supported_scales_dummy[] = {
1.0,
2.0
};
struct _MetaMonitorManagerDummy
{
MetaMonitorManager parent_instance;
gboolean is_transform_handled;
};
struct _MetaMonitorManagerDummyClass
{
MetaMonitorManagerClass parent_class;
};
typedef struct _MetaOutputDummy
{
int scale;
} MetaOutputDummy;
G_DEFINE_TYPE (MetaMonitorManagerDummy, meta_monitor_manager_dummy, META_TYPE_MONITOR_MANAGER);
static void
meta_output_dummy_notify_destroy (MetaOutput *output);
#define array_last(a, t) \
g_array_index (a, t, a->len - 1)
static void
append_monitor (GArray *modes,
GArray *crtcs,
GArray *outputs,
int scale)
{
MetaCrtcMode modes_decl[] = {
{
.width = 800,
.height = 600,
.refresh_rate = 60.0
},
{
.width = 1024,
.height = 768,
.refresh_rate = 60.0
}
};
MetaCrtc crtc;
MetaOutputDummy *output_dummy;
MetaOutput output;
unsigned int i;
for (i = 0; i < G_N_ELEMENTS (modes_decl); i++)
modes_decl[i].mode_id = modes->len + i;
g_array_append_vals (modes, modes_decl, G_N_ELEMENTS (modes_decl));
crtc = (MetaCrtc) {
.crtc_id = crtcs->len + 1,
.all_transforms = ALL_TRANSFORMS,
};
g_array_append_val (crtcs, crtc);
output_dummy = g_new0 (MetaOutputDummy, 1);
*output_dummy = (MetaOutputDummy) {
.scale = scale
};
output = (MetaOutput) {
.winsys_id = outputs->len + 1,
.name = g_strdup_printf ("LVDS%d", outputs->len + 1),
.vendor = g_strdup ("MetaProducts Inc."),
.product = g_strdup ("MetaMonitor"),
.serial = g_strdup_printf ("0xC0FFEE-%d", outputs->len + 1),
.suggested_x = -1,
.suggested_y = -1,
.width_mm = 222,
.height_mm = 125,
.subpixel_order = COGL_SUBPIXEL_ORDER_UNKNOWN,
.preferred_mode = &array_last (modes, MetaCrtcMode),
.n_possible_clones = 0,
.backlight = -1,
.connector_type = META_CONNECTOR_TYPE_LVDS,
.driver_private = output_dummy,
.driver_notify =
(GDestroyNotify) meta_output_dummy_notify_destroy
};
output.modes = g_new0 (MetaCrtcMode *, G_N_ELEMENTS (modes_decl));
for (i = 0; i < G_N_ELEMENTS (modes_decl); i++)
output.modes[i] = &g_array_index (modes, MetaCrtcMode,
modes->len - (i + 1));
output.n_modes = G_N_ELEMENTS (modes_decl);
output.possible_crtcs = g_new0 (MetaCrtc *, 1);
output.possible_crtcs[0] = &array_last (crtcs, MetaCrtc);
output.n_possible_crtcs = 1;
g_array_append_val (outputs, output);
}
static void
append_tiled_monitor (GArray *modes,
GArray *crtcs,
GArray *outputs,
int scale)
{
MetaCrtcMode modes_decl[] = {
{
.width = 800,
.height = 600,
.refresh_rate = 60.0
},
{
.width = 512,
.height = 768,
.refresh_rate = 60.0
}
};
MetaCrtc crtcs_decl[] = {
{
.all_transforms = ALL_TRANSFORMS,
},
{
.all_transforms = ALL_TRANSFORMS,
},
};
MetaOutput output;
unsigned int i;
uint32_t tile_group_id;
for (i = 0; i < G_N_ELEMENTS (modes_decl); i++)
modes_decl[i].mode_id = modes->len + i;
g_array_append_vals (modes, modes_decl, G_N_ELEMENTS (modes_decl));
for (i = 0; i < G_N_ELEMENTS (crtcs_decl); i++)
crtcs_decl[i].crtc_id = crtcs->len + i + 1;
g_array_append_vals (crtcs, crtcs_decl, G_N_ELEMENTS (crtcs_decl));
tile_group_id = outputs->len + 1;
for (i = 0; i < G_N_ELEMENTS (crtcs_decl); i++)
{
MetaOutputDummy *output_dummy;
MetaCrtcMode *preferred_mode;
unsigned int j;
output_dummy = g_new0 (MetaOutputDummy, 1);
*output_dummy = (MetaOutputDummy) {
.scale = scale
};
preferred_mode = &array_last (modes, MetaCrtcMode),
output = (MetaOutput) {
.winsys_id = outputs->len + 1,
.name = g_strdup_printf ("LVDS%d", outputs->len + 1),
.vendor = g_strdup ("MetaProducts Inc."),
.product = g_strdup ("MetaMonitor"),
.serial = g_strdup_printf ("0xC0FFEE-%d", outputs->len + 1),
.suggested_x = -1,
.suggested_y = -1,
.width_mm = 222,
.height_mm = 125,
.subpixel_order = COGL_SUBPIXEL_ORDER_UNKNOWN,
.preferred_mode = preferred_mode,
.n_possible_clones = 0,
.backlight = -1,
.connector_type = META_CONNECTOR_TYPE_LVDS,
.tile_info = (MetaTileInfo) {
.group_id = tile_group_id,
.max_h_tiles = G_N_ELEMENTS (crtcs_decl),
.max_v_tiles = 1,
.loc_h_tile = i,
.loc_v_tile = 0,
.tile_w = preferred_mode->width,
.tile_h = preferred_mode->height
},
.driver_private = output_dummy,
.driver_notify =
(GDestroyNotify) meta_output_dummy_notify_destroy
};
output.modes = g_new0 (MetaCrtcMode *, G_N_ELEMENTS (modes_decl));
for (j = 0; j < G_N_ELEMENTS (modes_decl); j++)
output.modes[j] = &g_array_index (modes, MetaCrtcMode,
modes->len - (j + 1));
output.n_modes = G_N_ELEMENTS (modes_decl);
output.possible_crtcs = g_new0 (MetaCrtc *, G_N_ELEMENTS (crtcs_decl));
for (j = 0; j < G_N_ELEMENTS (crtcs_decl); j++)
output.possible_crtcs[j] = &g_array_index (crtcs, MetaCrtc,
crtcs->len - (j + 1));
output.n_possible_crtcs = G_N_ELEMENTS (crtcs_decl);
g_array_append_val (outputs, output);
}
}
static void
meta_output_dummy_notify_destroy (MetaOutput *output)
{
g_clear_pointer (&output->driver_private, g_free);
}
static void
meta_monitor_manager_dummy_read_current (MetaMonitorManager *manager)
{
unsigned int num_monitors = 1;
int *monitor_scales = NULL;
const char *num_monitors_str;
const char *monitor_scales_str;
const char *tiled_monitors_str;
gboolean tiled_monitors;
unsigned int i;
GArray *outputs;
GArray *crtcs;
GArray *modes;
/* To control what monitor configuration is generated, there are two available
* environmental variables that can be used:
*
* MUTTER_DEBUG_NUM_DUMMY_MONITORS
*
* Specifies the number of dummy monitors to include in the stage. Every
* monitor is 1024x786 pixels and they are placed on a horizontal row.
*
* MUTTER_DEBUG_DUMMY_MONITOR_SCALES
*
* A comma separated list that specifies the scales of the dummy monitors.
*
* MUTTER_DEBUG_TILED_DUMMY_MONITORS
*
* If set to "1" the dummy monitors will emulate being tiled, i.e. each have a
* unique tile group id, made up of multiple outputs and CRTCs.
*
* For example the following configuration results in two monitors, where the
* first one has the monitor scale 1, and the other the monitor scale 2.
*
* MUTTER_DEBUG_NUM_DUMMY_MONITORS=2
* MUTTER_DEBUG_DUMMY_MONITOR_SCALES=1,2
* MUTTER_DEBUG_TILED_DUMMY_MONITORS=1
*/
num_monitors_str = getenv ("MUTTER_DEBUG_NUM_DUMMY_MONITORS");
if (num_monitors_str)
{
num_monitors = g_ascii_strtoll (num_monitors_str, NULL, 10);
if (num_monitors <= 0)
{
meta_warning ("Invalid number of dummy monitors");
num_monitors = 1;
}
if (num_monitors > MAX_MONITORS)
{
meta_warning ("Clamping monitor count to max (%d)",
MAX_MONITORS);
num_monitors = MAX_MONITORS;
}
}
monitor_scales = g_newa (int, num_monitors);
for (i = 0; i < num_monitors; i++)
monitor_scales[i] = 1;
monitor_scales_str = getenv ("MUTTER_DEBUG_DUMMY_MONITOR_SCALES");
if (monitor_scales_str)
{
gchar **scales_str_list;
scales_str_list = g_strsplit (monitor_scales_str, ",", -1);
if (g_strv_length (scales_str_list) != num_monitors)
meta_warning ("Number of specified monitor scales differ from number "
"of monitors (defaults to 1).\n");
for (i = 0; i < num_monitors && scales_str_list[i]; i++)
{
int scale = g_ascii_strtoll (scales_str_list[i], NULL, 10);
if (scale == 1 || scale == 2)
monitor_scales[i] = scale;
else
meta_warning ("Invalid dummy monitor scale");
}
g_strfreev (scales_str_list);
}
tiled_monitors_str = g_getenv ("MUTTER_DEBUG_TILED_DUMMY_MONITORS");
tiled_monitors = g_strcmp0 (tiled_monitors_str, "1") == 0;
modes = g_array_sized_new (FALSE, TRUE, sizeof (MetaCrtcMode), MAX_MODES);
crtcs = g_array_sized_new (FALSE, TRUE, sizeof (MetaCrtc), MAX_CRTCS);
outputs = g_array_sized_new (FALSE, TRUE, sizeof (MetaOutput), MAX_OUTPUTS);
for (i = 0; i < num_monitors; i++)
{
if (tiled_monitors)
append_tiled_monitor (modes, crtcs, outputs, monitor_scales[i]);
else
append_monitor (modes, crtcs, outputs, monitor_scales[i]);
}
manager->modes = (MetaCrtcMode *) modes->data;
manager->n_modes = modes->len;
manager->crtcs = (MetaCrtc *) crtcs->data;
manager->n_crtcs = crtcs->len;
manager->outputs = (MetaOutput *) outputs->data;
manager->n_outputs = outputs->len;
g_array_free (modes, FALSE);
g_array_free (crtcs, FALSE);
g_array_free (outputs, FALSE);
}
static void
meta_monitor_manager_dummy_ensure_initial_config (MetaMonitorManager *manager)
{
MetaMonitorsConfig *config;
config = meta_monitor_manager_ensure_configured (manager);
if (manager->config_manager)
meta_monitor_manager_update_logical_state (manager, config);
else
meta_monitor_manager_update_logical_state_derived (manager);
}
static void
apply_crtc_assignments (MetaMonitorManager *manager,
MetaCrtcInfo **crtcs,
unsigned int n_crtcs,
MetaOutputInfo **outputs,
unsigned int n_outputs)
{
unsigned i;
for (i = 0; i < n_crtcs; i++)
{
MetaCrtcInfo *crtc_info = crtcs[i];
MetaCrtc *crtc = crtc_info->crtc;
crtc->is_dirty = TRUE;
if (crtc_info->mode == NULL)
{
crtc->rect.x = 0;
crtc->rect.y = 0;
crtc->rect.width = 0;
crtc->rect.height = 0;
crtc->current_mode = NULL;
}
else
{
MetaCrtcMode *mode;
MetaOutput *output;
unsigned int j;
int width, height;
mode = crtc_info->mode;
if (meta_monitor_transform_is_rotated (crtc_info->transform))
{
width = mode->height;
height = mode->width;
}
else
{
width = mode->width;
height = mode->height;
}
crtc->rect.x = crtc_info->x;
crtc->rect.y = crtc_info->y;
crtc->rect.width = width;
crtc->rect.height = height;
crtc->current_mode = mode;
crtc->transform = crtc_info->transform;
for (j = 0; j < crtc_info->outputs->len; j++)
{
output = ((MetaOutput**)crtc_info->outputs->pdata)[j];
output->is_dirty = TRUE;
output->crtc = crtc;
}
}
}
for (i = 0; i < n_outputs; i++)
{
MetaOutputInfo *output_info = outputs[i];
MetaOutput *output = output_info->output;
output->is_primary = output_info->is_primary;
output->is_presentation = output_info->is_presentation;
}
/* Disable CRTCs not mentioned in the list */
for (i = 0; i < manager->n_crtcs; i++)
{
MetaCrtc *crtc = &manager->crtcs[i];
crtc->logical_monitor = NULL;
if (crtc->is_dirty)
{
crtc->is_dirty = FALSE;
continue;
}
crtc->rect.x = 0;
crtc->rect.y = 0;
crtc->rect.width = 0;
crtc->rect.height = 0;
crtc->current_mode = NULL;
}
/* Disable outputs not mentioned in the list */
for (i = 0; i < manager->n_outputs; i++)
{
MetaOutput *output = &manager->outputs[i];
if (output->is_dirty)
{
output->is_dirty = FALSE;
continue;
}
output->crtc = NULL;
output->is_primary = FALSE;
}
}
static void
update_screen_size (MetaMonitorManager *manager,
MetaMonitorsConfig *config)
{
GList *l;
int screen_width = 0;
int screen_height = 0;
for (l = config->logical_monitor_configs; l; l = l->next)
{
MetaLogicalMonitorConfig *logical_monitor_config = l->data;
int right_edge;
int bottom_edge;
right_edge = (logical_monitor_config->layout.width +
logical_monitor_config->layout.x);
if (right_edge > screen_width)
screen_width = right_edge;
bottom_edge = (logical_monitor_config->layout.height +
logical_monitor_config->layout.y);
if (bottom_edge > screen_height)
screen_height = bottom_edge;
}
manager->screen_width = screen_width;
manager->screen_height = screen_height;
}
static gboolean
meta_monitor_manager_dummy_apply_monitors_config (MetaMonitorManager *manager,
MetaMonitorsConfig *config,
MetaMonitorsConfigMethod method,
GError **error)
{
GPtrArray *crtc_infos;
GPtrArray *output_infos;
if (!config)
{
manager->screen_width = 0;
manager->screen_height = 0;
meta_monitor_manager_rebuild (manager, NULL);
}
if (!meta_monitor_config_manager_assign (manager, config,
&crtc_infos, &output_infos,
error))
return FALSE;
if (method == META_MONITORS_CONFIG_METHOD_VERIFY)
{
g_ptr_array_free (crtc_infos, TRUE);
g_ptr_array_free (output_infos, TRUE);
return TRUE;
}
apply_crtc_assignments (manager,
(MetaCrtcInfo **) crtc_infos->pdata,
crtc_infos->len,
(MetaOutputInfo **) output_infos->pdata,
output_infos->len);
g_ptr_array_free (crtc_infos, TRUE);
g_ptr_array_free (output_infos, TRUE);
update_screen_size (manager, config);
meta_monitor_manager_rebuild (manager, config);
return TRUE;
}
static void
legacy_calculate_screen_size (MetaMonitorManager *manager)
{
unsigned int i;
int width = 0, height = 0;
for (i = 0; i < manager->n_crtcs; i++)
{
MetaCrtc *crtc = &manager->crtcs[i];
width = MAX (width, crtc->rect.x + crtc->rect.width);
height = MAX (height, crtc->rect.y + crtc->rect.height);
}
manager->screen_width = width;
manager->screen_height = height;
}
static void
meta_monitor_manager_dummy_apply_config (MetaMonitorManager *manager,
MetaCrtcInfo **crtcs,
unsigned int n_crtcs,
MetaOutputInfo **outputs,
unsigned int n_outputs)
{
apply_crtc_assignments (manager, crtcs, n_crtcs, outputs, n_outputs);
legacy_calculate_screen_size (manager);
meta_monitor_manager_rebuild_derived (manager);
}
static gboolean
meta_monitor_manager_dummy_is_transform_handled (MetaMonitorManager *manager,
MetaCrtc *crtc,
MetaMonitorTransform transform)
{
MetaMonitorManagerDummy *manager_dummy = META_MONITOR_MANAGER_DUMMY (manager);
return manager_dummy->is_transform_handled;
}
static int
meta_monitor_manager_dummy_calculate_monitor_mode_scale (MetaMonitorManager *manager,
MetaMonitor *monitor,
MetaMonitorMode *monitor_mode)
{
MetaOutput *output;
MetaOutputDummy *output_dummy;
output = meta_monitor_get_main_output (monitor);
output_dummy = output->driver_private;
return output_dummy->scale;
}
static void
meta_monitor_manager_dummy_get_supported_scales (MetaMonitorManager *manager,
float **scales,
int *n_scales)
{
*scales = supported_scales_dummy;
*n_scales = G_N_ELEMENTS (supported_scales_dummy);
}
static gboolean
is_monitor_framebuffers_scaled (void)
{
MetaBackend *backend = meta_get_backend ();
return meta_backend_is_experimental_feature_enabled (
backend,
META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER);
}
static MetaMonitorManagerCapability
meta_monitor_manager_dummy_get_capabilities (MetaMonitorManager *manager)
{
MetaMonitorManagerCapability capabilities =
META_MONITOR_MANAGER_CAPABILITY_NONE;
capabilities |= META_MONITOR_MANAGER_CAPABILITY_MIRRORING;
if (meta_backend_is_experimental_feature_enabled (
meta_get_backend (),
META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER))
capabilities |= META_MONITOR_MANAGER_CAPABILITY_LAYOUT_MODE;
return capabilities;
}
static gboolean
meta_monitor_manager_dummy_get_max_screen_size (MetaMonitorManager *manager,
int *max_width,
int *max_height)
{
if (meta_is_stage_views_enabled ())
return FALSE;
*max_width = 65535;
*max_height = 65535;
return TRUE;
}
static MetaLogicalMonitorLayoutMode
meta_monitor_manager_dummy_get_default_layout_mode (MetaMonitorManager *manager)
{
if (!meta_is_stage_views_enabled ())
return META_LOGICAL_MONITOR_LAYOUT_MODE_PHYSICAL;
if (is_monitor_framebuffers_scaled ())
return META_LOGICAL_MONITOR_LAYOUT_MODE_LOGICAL;
else
return META_LOGICAL_MONITOR_LAYOUT_MODE_PHYSICAL;
}
static void
meta_monitor_manager_dummy_class_init (MetaMonitorManagerDummyClass *klass)
{
MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_CLASS (klass);
manager_class->read_current = meta_monitor_manager_dummy_read_current;
manager_class->ensure_initial_config = meta_monitor_manager_dummy_ensure_initial_config;
manager_class->apply_monitors_config = meta_monitor_manager_dummy_apply_monitors_config;
manager_class->apply_configuration = meta_monitor_manager_dummy_apply_config;
manager_class->is_transform_handled = meta_monitor_manager_dummy_is_transform_handled;
manager_class->calculate_monitor_mode_scale = meta_monitor_manager_dummy_calculate_monitor_mode_scale;
manager_class->get_supported_scales = meta_monitor_manager_dummy_get_supported_scales;
manager_class->get_capabilities = meta_monitor_manager_dummy_get_capabilities;
manager_class->get_max_screen_size = meta_monitor_manager_dummy_get_max_screen_size;
manager_class->get_default_layout_mode = meta_monitor_manager_dummy_get_default_layout_mode;
}
static void
meta_monitor_manager_dummy_init (MetaMonitorManagerDummy *manager)
{
const char *nested_offscreen_transform;
nested_offscreen_transform =
g_getenv ("MUTTER_DEBUG_NESTED_OFFSCREEN_TRANSFORM");
if (g_strcmp0 (nested_offscreen_transform, "1") == 0)
manager->is_transform_handled = FALSE;
else
manager->is_transform_handled = TRUE;
}
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