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wine/dlls/winex11.drv/settings.c
Zhiyi Zhang c4a15755de winex11.drv: Adjust the priority of NoRes display settings handler to 1. 
A display settings handler with a priority of 0 can not be properly registered due to how
X11DRV_Settings_SetHandler() is implemented. Fix a regression introduced by 9c99d9bceb.

Spotted by Torge Matthies.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50135
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2020-11-16 17:51:30 +01:00

932 lines
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/*
* Wine X11drv display settings functions
*
* Copyright 2003 Alexander James Pasadyn
* Copyright 2020 Zhiyi Zhang for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdlib.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "x11drv.h"
#include "windef.h"
#include "winreg.h"
#include "wingdi.h"
#include "wine/debug.h"
#include "wine/heap.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(x11settings);
struct x11drv_display_setting
{
ULONG_PTR id;
BOOL placed;
RECT new_rect;
RECT desired_rect;
DEVMODEW desired_mode;
};
/* All Windows drivers seen so far either support 32 bit depths, or 24 bit depths, but never both. So if we have
* a 32 bit framebuffer, report 32 bit bpps, otherwise 24 bit ones.
*/
static const unsigned int depths_24[] = {8, 16, 24};
static const unsigned int depths_32[] = {8, 16, 32};
const unsigned int *depths;
static struct x11drv_settings_handler handler;
/* Cached display modes for a device, protected by modes_section */
static WCHAR cached_device_name[CCHDEVICENAME];
static DWORD cached_flags;
static DEVMODEW *cached_modes;
static UINT cached_mode_count;
static CRITICAL_SECTION modes_section;
static CRITICAL_SECTION_DEBUG modes_critsect_debug =
{
0, 0, &modes_section,
{&modes_critsect_debug.ProcessLocksList, &modes_critsect_debug.ProcessLocksList},
0, 0, {(DWORD_PTR)(__FILE__ ": modes_section")}
};
static CRITICAL_SECTION modes_section = {&modes_critsect_debug, -1, 0, 0, 0, 0};
void X11DRV_Settings_SetHandler(const struct x11drv_settings_handler *new_handler)
{
if (new_handler->priority > handler.priority)
{
handler = *new_handler;
TRACE("Display settings are now handled by: %s.\n", handler.name);
}
}
/***********************************************************************
* Default handlers if resolution switching is not enabled
*
*/
static BOOL nores_get_id(const WCHAR *device_name, ULONG_PTR *id)
{
WCHAR primary_adapter[CCHDEVICENAME];
if (!get_primary_adapter( primary_adapter ))
return FALSE;
*id = !lstrcmpiW( device_name, primary_adapter ) ? 1 : 0;
return TRUE;
}
static BOOL nores_get_modes(ULONG_PTR id, DWORD flags, DEVMODEW **new_modes, UINT *mode_count)
{
RECT primary = get_host_primary_monitor_rect();
DEVMODEW *modes;
modes = heap_calloc(1, sizeof(*modes));
if (!modes)
{
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return FALSE;
}
modes[0].dmSize = sizeof(*modes);
modes[0].dmDriverExtra = 0;
modes[0].dmFields = DM_DISPLAYORIENTATION | DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT |
DM_DISPLAYFLAGS | DM_DISPLAYFREQUENCY;
modes[0].u1.s2.dmDisplayOrientation = DMDO_DEFAULT;
modes[0].dmBitsPerPel = screen_bpp;
modes[0].dmPelsWidth = primary.right;
modes[0].dmPelsHeight = primary.bottom;
modes[0].u2.dmDisplayFlags = 0;
modes[0].dmDisplayFrequency = 60;
*new_modes = modes;
*mode_count = 1;
return TRUE;
}
static void nores_free_modes(DEVMODEW *modes)
{
heap_free(modes);
}
static BOOL nores_get_current_mode(ULONG_PTR id, DEVMODEW *mode)
{
RECT primary = get_host_primary_monitor_rect();
mode->dmFields = DM_DISPLAYORIENTATION | DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT |
DM_DISPLAYFLAGS | DM_DISPLAYFREQUENCY | DM_POSITION;
mode->u1.s2.dmDisplayOrientation = DMDO_DEFAULT;
mode->u2.dmDisplayFlags = 0;
mode->u1.s2.dmPosition.x = 0;
mode->u1.s2.dmPosition.y = 0;
if (id != 1)
{
FIXME("Non-primary adapters are unsupported.\n");
mode->dmBitsPerPel = 0;
mode->dmPelsWidth = 0;
mode->dmPelsHeight = 0;
mode->dmDisplayFrequency = 0;
return TRUE;
}
mode->dmBitsPerPel = screen_bpp;
mode->dmPelsWidth = primary.right;
mode->dmPelsHeight = primary.bottom;
mode->dmDisplayFrequency = 60;
return TRUE;
}
static LONG nores_set_current_mode(ULONG_PTR id, DEVMODEW *mode)
{
WARN("NoRes settings handler, ignoring mode change request.\n");
return DISP_CHANGE_SUCCESSFUL;
}
/* default handler only gets the current X desktop resolution */
void X11DRV_Settings_Init(void)
{
struct x11drv_settings_handler nores_handler;
depths = screen_bpp == 32 ? depths_32 : depths_24;
nores_handler.name = "NoRes";
nores_handler.priority = 1;
nores_handler.get_id = nores_get_id;
nores_handler.get_modes = nores_get_modes;
nores_handler.free_modes = nores_free_modes;
nores_handler.get_current_mode = nores_get_current_mode;
nores_handler.set_current_mode = nores_set_current_mode;
X11DRV_Settings_SetHandler(&nores_handler);
}
/* Initialize registry display settings when new display devices are added */
void init_registry_display_settings(void)
{
DEVMODEW dm = {.dmSize = sizeof(dm)};
DISPLAY_DEVICEW dd = {sizeof(dd)};
DWORD i = 0;
LONG ret;
while (EnumDisplayDevicesW(NULL, i++, &dd, 0))
{
/* Skip if the device already has registry display settings */
if (EnumDisplaySettingsExW(dd.DeviceName, ENUM_REGISTRY_SETTINGS, &dm, 0))
continue;
if (!EnumDisplaySettingsExW(dd.DeviceName, ENUM_CURRENT_SETTINGS, &dm, 0))
{
ERR("Failed to query current display settings for %s.\n", wine_dbgstr_w(dd.DeviceName));
continue;
}
TRACE("Device %s current display mode %ux%u %ubits %uHz at %d,%d.\n",
wine_dbgstr_w(dd.DeviceName), dm.dmPelsWidth, dm.dmPelsHeight, dm.dmBitsPerPel,
dm.dmDisplayFrequency, dm.u1.s2.dmPosition.x, dm.u1.s2.dmPosition.y);
ret = ChangeDisplaySettingsExW(dd.DeviceName, &dm, NULL,
CDS_GLOBAL | CDS_NORESET | CDS_UPDATEREGISTRY, NULL);
if (ret != DISP_CHANGE_SUCCESSFUL)
ERR("Failed to save registry display settings for %s, returned %d.\n",
wine_dbgstr_w(dd.DeviceName), ret);
}
}
static BOOL get_display_device_reg_key(const WCHAR *device_name, WCHAR *key, unsigned len)
{
static const WCHAR display[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y'};
static const WCHAR video_value_fmt[] = {'\\','D','e','v','i','c','e','\\',
'V','i','d','e','o','%','d',0};
static const WCHAR video_key[] = {'H','A','R','D','W','A','R','E','\\',
'D','E','V','I','C','E','M','A','P','\\',
'V','I','D','E','O','\\',0};
WCHAR value_name[MAX_PATH], buffer[MAX_PATH], *end_ptr;
DWORD adapter_index, size;
/* Device name has to be \\.\DISPLAY%d */
if (strncmpiW(device_name, display, ARRAY_SIZE(display)))
return FALSE;
/* Parse \\.\DISPLAY* */
adapter_index = strtolW(device_name + ARRAY_SIZE(display), &end_ptr, 10) - 1;
if (*end_ptr)
return FALSE;
/* Open \Device\Video* in HKLM\HARDWARE\DEVICEMAP\VIDEO\ */
sprintfW(value_name, video_value_fmt, adapter_index);
size = sizeof(buffer);
if (RegGetValueW(HKEY_LOCAL_MACHINE, video_key, value_name, RRF_RT_REG_SZ, NULL, buffer, &size))
return FALSE;
if (len < lstrlenW(buffer + 18) + 1)
return FALSE;
/* Skip \Registry\Machine\ prefix */
lstrcpyW(key, buffer + 18);
TRACE("display device %s registry settings key %s.\n", wine_dbgstr_w(device_name), wine_dbgstr_w(key));
return TRUE;
}
static BOOL read_registry_settings(const WCHAR *device_name, DEVMODEW *dm)
{
WCHAR wine_x11_reg_key[MAX_PATH];
HANDLE mutex;
HKEY hkey;
DWORD type, size;
BOOL ret = TRUE;
dm->dmFields = 0;
mutex = get_display_device_init_mutex();
if (!get_display_device_reg_key(device_name, wine_x11_reg_key, ARRAY_SIZE(wine_x11_reg_key)))
{
release_display_device_init_mutex(mutex);
return FALSE;
}
if (RegOpenKeyExW(HKEY_CURRENT_CONFIG, wine_x11_reg_key, 0, KEY_READ, &hkey))
{
release_display_device_init_mutex(mutex);
return FALSE;
}
#define query_value(name, data) \
size = sizeof(DWORD); \
if (RegQueryValueExA(hkey, name, 0, &type, (LPBYTE)(data), &size) || \
type != REG_DWORD || size != sizeof(DWORD)) \
ret = FALSE
query_value("DefaultSettings.BitsPerPel", &dm->dmBitsPerPel);
dm->dmFields |= DM_BITSPERPEL;
query_value("DefaultSettings.XResolution", &dm->dmPelsWidth);
dm->dmFields |= DM_PELSWIDTH;
query_value("DefaultSettings.YResolution", &dm->dmPelsHeight);
dm->dmFields |= DM_PELSHEIGHT;
query_value("DefaultSettings.VRefresh", &dm->dmDisplayFrequency);
dm->dmFields |= DM_DISPLAYFREQUENCY;
query_value("DefaultSettings.Flags", &dm->u2.dmDisplayFlags);
dm->dmFields |= DM_DISPLAYFLAGS;
query_value("DefaultSettings.XPanning", &dm->u1.s2.dmPosition.x);
query_value("DefaultSettings.YPanning", &dm->u1.s2.dmPosition.y);
dm->dmFields |= DM_POSITION;
query_value("DefaultSettings.Orientation", &dm->u1.s2.dmDisplayOrientation);
dm->dmFields |= DM_DISPLAYORIENTATION;
query_value("DefaultSettings.FixedOutput", &dm->u1.s2.dmDisplayFixedOutput);
#undef query_value
RegCloseKey(hkey);
release_display_device_init_mutex(mutex);
return ret;
}
static BOOL write_registry_settings(const WCHAR *device_name, const DEVMODEW *dm)
{
WCHAR wine_x11_reg_key[MAX_PATH];
HANDLE mutex;
HKEY hkey;
BOOL ret = TRUE;
mutex = get_display_device_init_mutex();
if (!get_display_device_reg_key(device_name, wine_x11_reg_key, ARRAY_SIZE(wine_x11_reg_key)))
{
release_display_device_init_mutex(mutex);
return FALSE;
}
if (RegCreateKeyExW(HKEY_CURRENT_CONFIG, wine_x11_reg_key, 0, NULL,
REG_OPTION_VOLATILE, KEY_WRITE, NULL, &hkey, NULL))
{
release_display_device_init_mutex(mutex);
return FALSE;
}
#define set_value(name, data) \
if (RegSetValueExA(hkey, name, 0, REG_DWORD, (const BYTE*)(data), sizeof(DWORD))) \
ret = FALSE
set_value("DefaultSettings.BitsPerPel", &dm->dmBitsPerPel);
set_value("DefaultSettings.XResolution", &dm->dmPelsWidth);
set_value("DefaultSettings.YResolution", &dm->dmPelsHeight);
set_value("DefaultSettings.VRefresh", &dm->dmDisplayFrequency);
set_value("DefaultSettings.Flags", &dm->u2.dmDisplayFlags);
set_value("DefaultSettings.XPanning", &dm->u1.s2.dmPosition.x);
set_value("DefaultSettings.YPanning", &dm->u1.s2.dmPosition.y);
set_value("DefaultSettings.Orientation", &dm->u1.s2.dmDisplayOrientation);
set_value("DefaultSettings.FixedOutput", &dm->u1.s2.dmDisplayFixedOutput);
#undef set_value
RegCloseKey(hkey);
release_display_device_init_mutex(mutex);
return ret;
}
BOOL get_primary_adapter(WCHAR *name)
{
DISPLAY_DEVICEW dd;
DWORD i;
dd.cb = sizeof(dd);
for (i = 0; EnumDisplayDevicesW(NULL, i, &dd, 0); ++i)
{
if (dd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
{
lstrcpyW(name, dd.DeviceName);
return TRUE;
}
}
return FALSE;
}
static int mode_compare(const void *p1, const void *p2)
{
DWORD a_width, a_height, b_width, b_height;
const DEVMODEW *a = p1, *b = p2;
/* Use the width and height in landscape mode for comparison */
if (a->u1.s2.dmDisplayOrientation == DMDO_DEFAULT || a->u1.s2.dmDisplayOrientation == DMDO_180)
{
a_width = a->dmPelsWidth;
a_height = a->dmPelsHeight;
}
else
{
a_width = a->dmPelsHeight;
a_height = a->dmPelsWidth;
}
if (b->u1.s2.dmDisplayOrientation == DMDO_DEFAULT || b->u1.s2.dmDisplayOrientation == DMDO_180)
{
b_width = b->dmPelsWidth;
b_height = b->dmPelsHeight;
}
else
{
b_width = b->dmPelsHeight;
b_height = b->dmPelsWidth;
}
/* Depth in descending order */
if (a->dmBitsPerPel != b->dmBitsPerPel)
return b->dmBitsPerPel - a->dmBitsPerPel;
/* Width in ascending order */
if (a_width != b_width)
return a_width - b_width;
/* Height in ascending order */
if (a_height != b_height)
return a_height - b_height;
/* Frequency in descending order */
if (a->dmDisplayFrequency != b->dmDisplayFrequency)
return b->dmDisplayFrequency - a->dmDisplayFrequency;
/* Orientation in ascending order */
return a->u1.s2.dmDisplayOrientation - b->u1.s2.dmDisplayOrientation;
}
/***********************************************************************
* EnumDisplaySettingsEx (X11DRV.@)
*
*/
BOOL CDECL X11DRV_EnumDisplaySettingsEx( LPCWSTR name, DWORD n, LPDEVMODEW devmode, DWORD flags)
{
static const WCHAR dev_name[CCHDEVICENAME] =
{ 'W','i','n','e',' ','X','1','1',' ','d','r','i','v','e','r',0 };
DEVMODEW *modes;
UINT mode_count;
ULONG_PTR id;
if (n == ENUM_REGISTRY_SETTINGS)
{
if (!read_registry_settings(name, devmode))
{
ERR("Failed to get %s registry display settings.\n", wine_dbgstr_w(name));
return FALSE;
}
goto done;
}
if (n == ENUM_CURRENT_SETTINGS)
{
if (!handler.get_id(name, &id) || !handler.get_current_mode(id, devmode))
{
ERR("Failed to get %s current display settings.\n", wine_dbgstr_w(name));
return FALSE;
}
goto done;
}
EnterCriticalSection(&modes_section);
if (n == 0 || lstrcmpiW(cached_device_name, name) || cached_flags != flags)
{
if (!handler.get_id(name, &id) || !handler.get_modes(id, flags, &modes, &mode_count))
{
ERR("Failed to get %s supported display modes.\n", wine_dbgstr_w(name));
LeaveCriticalSection(&modes_section);
return FALSE;
}
qsort(modes, mode_count, sizeof(*modes) + modes[0].dmDriverExtra, mode_compare);
if (cached_modes)
handler.free_modes(cached_modes);
lstrcpyW(cached_device_name, name);
cached_flags = flags;
cached_modes = modes;
cached_mode_count = mode_count;
}
if (n >= cached_mode_count)
{
LeaveCriticalSection(&modes_section);
WARN("handler:%s device:%s mode index:%#x not found.\n", handler.name, wine_dbgstr_w(name), n);
SetLastError(ERROR_NO_MORE_FILES);
return FALSE;
}
memcpy(devmode, (BYTE *)cached_modes + (sizeof(*cached_modes) + cached_modes[0].dmDriverExtra) * n, sizeof(*devmode));
LeaveCriticalSection(&modes_section);
done:
/* Set generic fields */
devmode->dmSize = FIELD_OFFSET(DEVMODEW, dmICMMethod);
devmode->dmDriverExtra = 0;
devmode->dmSpecVersion = DM_SPECVERSION;
devmode->dmDriverVersion = DM_SPECVERSION;
lstrcpyW(devmode->dmDeviceName, dev_name);
return TRUE;
}
BOOL is_detached_mode(const DEVMODEW *mode)
{
return mode->dmFields & DM_POSITION &&
mode->dmFields & DM_PELSWIDTH &&
mode->dmFields & DM_PELSHEIGHT &&
mode->dmPelsWidth == 0 &&
mode->dmPelsHeight == 0;
}
/* Get the full display mode with all the necessary fields set.
* Return NULL on failure. Caller should call free_full_mode() to free the returned mode. */
static DEVMODEW *get_full_mode(ULONG_PTR id, DEVMODEW *dev_mode)
{
DEVMODEW *modes, *full_mode, *found_mode = NULL;
UINT mode_count, mode_idx;
if (is_detached_mode(dev_mode))
return dev_mode;
if (!handler.get_modes(id, EDS_ROTATEDMODE, &modes, &mode_count))
return NULL;
qsort(modes, mode_count, sizeof(*modes) + modes[0].dmDriverExtra, mode_compare);
for (mode_idx = 0; mode_idx < mode_count; ++mode_idx)
{
found_mode = (DEVMODEW *)((BYTE *)modes + (sizeof(*modes) + modes[0].dmDriverExtra) * mode_idx);
if (dev_mode->dmFields & DM_BITSPERPEL &&
dev_mode->dmBitsPerPel &&
found_mode->dmBitsPerPel != dev_mode->dmBitsPerPel)
continue;
if (dev_mode->dmFields & DM_PELSWIDTH && found_mode->dmPelsWidth != dev_mode->dmPelsWidth)
continue;
if (dev_mode->dmFields & DM_PELSHEIGHT && found_mode->dmPelsHeight != dev_mode->dmPelsHeight)
continue;
if (dev_mode->dmFields & DM_DISPLAYFREQUENCY &&
dev_mode->dmDisplayFrequency &&
found_mode->dmDisplayFrequency &&
dev_mode->dmDisplayFrequency != 1 &&
dev_mode->dmDisplayFrequency != found_mode->dmDisplayFrequency)
continue;
if (dev_mode->dmFields & DM_DISPLAYORIENTATION &&
found_mode->u1.s2.dmDisplayOrientation != dev_mode->u1.s2.dmDisplayOrientation)
continue;
break;
}
if (!found_mode || mode_idx == mode_count)
{
handler.free_modes(modes);
return NULL;
}
if (!(full_mode = heap_alloc(sizeof(*found_mode) + found_mode->dmDriverExtra)))
{
handler.free_modes(modes);
return NULL;
}
memcpy(full_mode, found_mode, sizeof(*found_mode) + found_mode->dmDriverExtra);
handler.free_modes(modes);
full_mode->dmFields |= DM_POSITION;
full_mode->u1.s2.dmPosition = dev_mode->u1.s2.dmPosition;
return full_mode;
}
static void free_full_mode(DEVMODEW *mode)
{
if (!is_detached_mode(mode))
heap_free(mode);
}
static LONG get_display_settings(struct x11drv_display_setting **new_displays,
INT *new_display_count, const WCHAR *dev_name, DEVMODEW *dev_mode)
{
struct x11drv_display_setting *displays;
DEVMODEW registry_mode, current_mode;
INT display_idx, display_count = 0;
DISPLAY_DEVICEW display_device;
LONG ret = DISP_CHANGE_FAILED;
display_device.cb = sizeof(display_device);
for (display_idx = 0; EnumDisplayDevicesW(NULL, display_idx, &display_device, 0); ++display_idx)
++display_count;
displays = heap_calloc(display_count, sizeof(*displays));
if (!displays)
goto done;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (!EnumDisplayDevicesW(NULL, display_idx, &display_device, 0))
goto done;
if (!handler.get_id(display_device.DeviceName, &displays[display_idx].id))
{
ret = DISP_CHANGE_BADPARAM;
goto done;
}
if (!dev_mode)
{
memset(&registry_mode, 0, sizeof(registry_mode));
registry_mode.dmSize = sizeof(registry_mode);
if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_REGISTRY_SETTINGS, &registry_mode, 0))
goto done;
displays[display_idx].desired_mode = registry_mode;
}
else if (!lstrcmpiW(dev_name, display_device.DeviceName))
{
displays[display_idx].desired_mode = *dev_mode;
if (!(dev_mode->dmFields & DM_POSITION))
{
memset(&current_mode, 0, sizeof(current_mode));
current_mode.dmSize = sizeof(current_mode);
if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_CURRENT_SETTINGS, &current_mode, 0))
goto done;
displays[display_idx].desired_mode.dmFields |= DM_POSITION;
displays[display_idx].desired_mode.u1.s2.dmPosition = current_mode.u1.s2.dmPosition;
}
}
else
{
memset(&current_mode, 0, sizeof(current_mode));
current_mode.dmSize = sizeof(current_mode);
if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_CURRENT_SETTINGS, &current_mode, 0))
goto done;
displays[display_idx].desired_mode = current_mode;
}
SetRect(&displays[display_idx].desired_rect,
displays[display_idx].desired_mode.u1.s2.dmPosition.x,
displays[display_idx].desired_mode.u1.s2.dmPosition.y,
displays[display_idx].desired_mode.u1.s2.dmPosition.x + displays[display_idx].desired_mode.dmPelsWidth,
displays[display_idx].desired_mode.u1.s2.dmPosition.y + displays[display_idx].desired_mode.dmPelsHeight);
lstrcpyW(displays[display_idx].desired_mode.dmDeviceName, display_device.DeviceName);
}
*new_displays = displays;
*new_display_count = display_count;
return DISP_CHANGE_SUCCESSFUL;
done:
heap_free(displays);
return ret;
}
static INT offset_length(POINT offset)
{
return offset.x * offset.x + offset.y * offset.y;
}
/* Check if a rect overlaps with placed display rects */
static BOOL overlap_placed_displays(const RECT *rect, const struct x11drv_display_setting *displays, INT display_count)
{
INT display_idx;
RECT intersect;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (displays[display_idx].placed &&
IntersectRect(&intersect, &displays[display_idx].new_rect, rect))
return TRUE;
}
return FALSE;
}
/* Get the offset with minimum length to place a display next to the placed displays with no spacing and overlaps */
static POINT get_placement_offset(const struct x11drv_display_setting *displays, INT display_count, INT placing_idx)
{
POINT points[8], left_top, offset, min_offset = {0, 0};
INT display_idx, point_idx, point_count, vertex_idx;
BOOL has_placed = FALSE, first = TRUE;
INT width, height;
RECT rect;
/* If the display to be placed is detached, no offset is needed to place it */
if (IsRectEmpty(&displays[placing_idx].desired_rect))
return min_offset;
/* If there is no placed and attached display, place this display as it is */
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (displays[display_idx].placed && !IsRectEmpty(&displays[display_idx].new_rect))
{
has_placed = TRUE;
break;
}
}
if (!has_placed)
return min_offset;
/* Try to place this display with each of its four vertices at every vertex of the placed
* displays and see which combination has the minimum offset length */
width = displays[placing_idx].desired_rect.right - displays[placing_idx].desired_rect.left;
height = displays[placing_idx].desired_rect.bottom - displays[placing_idx].desired_rect.top;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (!displays[display_idx].placed || IsRectEmpty(&displays[display_idx].new_rect))
continue;
/* Get four vertices of the placed display rectangle */
points[0].x = displays[display_idx].new_rect.left;
points[0].y = displays[display_idx].new_rect.top;
points[1].x = displays[display_idx].new_rect.left;
points[1].y = displays[display_idx].new_rect.bottom;
points[2].x = displays[display_idx].new_rect.right;
points[2].y = displays[display_idx].new_rect.top;
points[3].x = displays[display_idx].new_rect.right;
points[3].y = displays[display_idx].new_rect.bottom;
point_count = 4;
/* Intersected points when moving the display to be placed horizontally */
if (displays[placing_idx].desired_rect.bottom >= displays[display_idx].new_rect.top &&
displays[placing_idx].desired_rect.top <= displays[display_idx].new_rect.bottom)
{
points[point_count].x = displays[display_idx].new_rect.left;
points[point_count++].y = displays[placing_idx].desired_rect.top;
points[point_count].x = displays[display_idx].new_rect.right;
points[point_count++].y = displays[placing_idx].desired_rect.top;
}
/* Intersected points when moving the display to be placed vertically */
if (displays[placing_idx].desired_rect.left <= displays[display_idx].new_rect.right &&
displays[placing_idx].desired_rect.right >= displays[display_idx].new_rect.left)
{
points[point_count].x = displays[placing_idx].desired_rect.left;
points[point_count++].y = displays[display_idx].new_rect.top;
points[point_count].x = displays[placing_idx].desired_rect.left;
points[point_count++].y = displays[display_idx].new_rect.bottom;
}
/* Try moving each vertex of the display rectangle to each points */
for (point_idx = 0; point_idx < point_count; ++point_idx)
{
for (vertex_idx = 0; vertex_idx < 4; ++vertex_idx)
{
switch (vertex_idx)
{
/* Move the bottom right vertex to the point */
case 0:
left_top.x = points[point_idx].x - width;
left_top.y = points[point_idx].y - height;
break;
/* Move the bottom left vertex to the point */
case 1:
left_top.x = points[point_idx].x;
left_top.y = points[point_idx].y - height;
break;
/* Move the top right vertex to the point */
case 2:
left_top.x = points[point_idx].x - width;
left_top.y = points[point_idx].y;
break;
/* Move the top left vertex to the point */
case 3:
left_top.x = points[point_idx].x;
left_top.y = points[point_idx].y;
break;
}
offset.x = left_top.x - displays[placing_idx].desired_rect.left;
offset.y = left_top.y - displays[placing_idx].desired_rect.top;
rect = displays[placing_idx].desired_rect;
OffsetRect(&rect, offset.x, offset.y);
if (!overlap_placed_displays(&rect, displays, display_count))
{
if (first)
{
min_offset = offset;
first = FALSE;
continue;
}
if (offset_length(offset) < offset_length(min_offset))
min_offset = offset;
}
}
}
}
return min_offset;
}
static void place_all_displays(struct x11drv_display_setting *displays, INT display_count)
{
INT left_most = INT_MAX, top_most = INT_MAX;
INT placing_idx, display_idx;
POINT min_offset, offset;
/* Place all displays with no extra space between them and no overlapping */
while (1)
{
/* Place the unplaced display with the minimum offset length first */
placing_idx = -1;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (displays[display_idx].placed)
continue;
offset = get_placement_offset(displays, display_count, display_idx);
if (placing_idx == -1 || offset_length(offset) < offset_length(min_offset))
{
min_offset = offset;
placing_idx = display_idx;
}
}
/* If all displays are placed */
if (placing_idx == -1)
break;
displays[placing_idx].new_rect = displays[placing_idx].desired_rect;
OffsetRect(&displays[placing_idx].new_rect, min_offset.x, min_offset.y);
displays[placing_idx].placed = TRUE;
}
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
displays[display_idx].desired_mode.u1.s2.dmPosition.x = displays[display_idx].new_rect.left;
displays[display_idx].desired_mode.u1.s2.dmPosition.y = displays[display_idx].new_rect.top;
left_most = min(left_most, displays[display_idx].new_rect.left);
top_most = min(top_most, displays[display_idx].new_rect.top);
}
/* Convert virtual screen coordinates to root coordinates */
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
displays[display_idx].desired_mode.u1.s2.dmPosition.x -= left_most;
displays[display_idx].desired_mode.u1.s2.dmPosition.y -= top_most;
}
}
static LONG apply_display_settings(struct x11drv_display_setting *displays, INT display_count, BOOL do_attach)
{
DEVMODEW *full_mode;
BOOL attached_mode;
INT display_idx;
LONG ret;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
attached_mode = !is_detached_mode(&displays[display_idx].desired_mode);
if ((attached_mode && !do_attach) || (!attached_mode && do_attach))
continue;
full_mode = get_full_mode(displays[display_idx].id, &displays[display_idx].desired_mode);
if (!full_mode)
return DISP_CHANGE_BADMODE;
TRACE("handler:%s changing %s to position:(%d,%d) resolution:%ux%u frequency:%uHz "
"depth:%ubits orientation:%#x.\n", handler.name,
wine_dbgstr_w(displays[display_idx].desired_mode.dmDeviceName),
full_mode->u1.s2.dmPosition.x, full_mode->u1.s2.dmPosition.y, full_mode->dmPelsWidth,
full_mode->dmPelsHeight, full_mode->dmDisplayFrequency, full_mode->dmBitsPerPel,
full_mode->u1.s2.dmDisplayOrientation);
ret = handler.set_current_mode(displays[display_idx].id, full_mode);
free_full_mode(full_mode);
if (ret != DISP_CHANGE_SUCCESSFUL)
return ret;
}
return DISP_CHANGE_SUCCESSFUL;
}
static BOOL all_detached_settings(const struct x11drv_display_setting *displays, INT display_count)
{
INT display_idx;
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (!is_detached_mode(&displays[display_idx].desired_mode))
return FALSE;
}
return TRUE;
}
/***********************************************************************
* ChangeDisplaySettingsEx (X11DRV.@)
*
*/
LONG CDECL X11DRV_ChangeDisplaySettingsEx( LPCWSTR devname, LPDEVMODEW devmode,
HWND hwnd, DWORD flags, LPVOID lpvoid )
{
struct x11drv_display_setting *displays;
INT display_idx, display_count;
DEVMODEW *full_mode;
LONG ret;
ret = get_display_settings(&displays, &display_count, devname, devmode);
if (ret != DISP_CHANGE_SUCCESSFUL)
return ret;
if (flags & CDS_UPDATEREGISTRY && devname && devmode)
{
for (display_idx = 0; display_idx < display_count; ++display_idx)
{
if (!lstrcmpiW(displays[display_idx].desired_mode.dmDeviceName, devname))
{
full_mode = get_full_mode(displays[display_idx].id, &displays[display_idx].desired_mode);
if (!full_mode)
{
heap_free(displays);
return DISP_CHANGE_BADMODE;
}
if (!write_registry_settings(devname, full_mode))
{
ERR("Failed to write %s display settings to registry.\n", wine_dbgstr_w(devname));
free_full_mode(full_mode);
heap_free(displays);
return DISP_CHANGE_NOTUPDATED;
}
free_full_mode(full_mode);
break;
}
}
}
if (flags & (CDS_TEST | CDS_NORESET))
{
heap_free(displays);
return DISP_CHANGE_SUCCESSFUL;
}
if (all_detached_settings(displays, display_count))
{
WARN("Detaching all displays is not permitted.\n");
heap_free(displays);
return DISP_CHANGE_SUCCESSFUL;
}
place_all_displays(displays, display_count);
/* Detach displays first to free up CRTCs */
ret = apply_display_settings(displays, display_count, FALSE);
if (ret == DISP_CHANGE_SUCCESSFUL)
ret = apply_display_settings(displays, display_count, TRUE);
if (ret == DISP_CHANGE_SUCCESSFUL)
X11DRV_DisplayDevices_Update(TRUE);
heap_free(displays);
return ret;
}
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