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win32u: Enumerate devices with a dedicated helper.

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Which will allow us to enumerate monitor devices later as well.
This commit is contained in:
Rémi Bernon 2024-02-27 14:37:50 +01:00 • committed by Alexandre Julliard
parent 788ba75432
commit c67726b3d0
1 changed files with 66 additions and 44 deletions
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110
dlls/win32u/sysparams.c
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@ -1489,6 +1489,60 @@ static void clear_display_devices(void)
}
}
static void enum_device_keys( const char *root, const WCHAR *classW, UINT class_size, void (*callback)(const char *) )
{
char buffer[1024];
KEY_VALUE_PARTIAL_INFORMATION *value = (void *)buffer;
KEY_BASIC_INFORMATION *key2 = (void *)buffer;
HKEY root_key, device_key, instance_key;
DWORD size, root_len, i = 0;
char path[MAX_PATH];
if (!(root_key = reg_open_ascii_key( enum_key, root ))) return;
root_len = sprintf( path, "%s\\", root );
while (!NtEnumerateKey( root_key, i++, KeyBasicInformation, key2, sizeof(buffer), &size ))
{
DWORD j = 0, k, len, device_len;
if (!(device_key = reg_open_key( root_key, key2->Name, key2->NameLength ))) continue;
for (k = 0, len = root_len; k < key2->NameLength / sizeof(WCHAR); k++) path[len++] = key2->Name[k];
path[len++] = '\\';
device_len = len;
while (!NtEnumerateKey( device_key, j++, KeyBasicInformation, key2, sizeof(buffer), &size ))
{
if (!(instance_key = reg_open_key( device_key, key2->Name, key2->NameLength ))) continue;
for (k = 0, len = device_len; k < key2->NameLength / sizeof(WCHAR); k++) path[len++] = key2->Name[k];
path[len++] = 0;
size = query_reg_ascii_value( instance_key, "ClassGUID", value, sizeof(buffer) );
if (size != class_size || wcscmp( (WCHAR *)value->Data, classW ))
{
NtClose( instance_key );
continue;
}
callback( path );
NtClose( instance_key );
}
NtClose( device_key );
}
NtClose( root_key );
}
static void enum_gpus( const char *path )
{
struct gpu *gpu;
if (!(gpu = calloc( 1, sizeof(*gpu) ))) return;
gpu->refcount = 1;
strcpy( gpu->path, path );
list_add_tail( &gpus, &gpu->entry );
}
static struct gpu *find_gpu_from_path( const char *path )
{
struct gpu *gpu;
@ -1502,11 +1556,11 @@ static struct gpu *find_gpu_from_path( const char *path )
static BOOL update_display_cache_from_registry(void)
{
char path[MAX_PATH], buffer[1024];
char buffer[1024], path[MAX_PATH];
DWORD adapter_id, monitor_id, monitor_count = 0, size;
KEY_VALUE_PARTIAL_INFORMATION *value = (void *)buffer;
KEY_BASIC_INFORMATION key, *key2 = (void *)buffer;
HKEY pci_key, device_key, gpu_key, prop_key;
KEY_BASIC_INFORMATION key;
HKEY gpu_key, prop_key;
struct adapter *adapter;
struct monitor *monitor, *monitor2;
HANDLE mutex = NULL;
@ -1532,52 +1586,20 @@ static BOOL update_display_cache_from_registry(void)
clear_display_devices();
if ((pci_key = reg_open_ascii_key( enum_key, "PCI" )))
enum_device_keys( "PCI", guid_devclass_displayW, sizeof(guid_devclass_displayW), enum_gpus );
LIST_FOR_EACH_ENTRY( gpu, &gpus, struct gpu, entry )
{
unsigned int i = 0;
if (!(gpu_key = reg_open_ascii_key( enum_key, gpu->path ))) continue;
while (!NtEnumerateKey( pci_key, i++, KeyBasicInformation, key2, sizeof(buffer), &size ))
if ((prop_key = reg_open_ascii_key( gpu_key, devpropkey_gpu_luidA )))
{
unsigned int j = 0;
if (!(device_key = reg_open_key( pci_key, key2->Name, key2->NameLength )))
continue;
while (!NtEnumerateKey( device_key, j++, KeyBasicInformation, key2, sizeof(buffer), &size ))
{
if (!(gpu_key = reg_open_key( device_key, key2->Name, key2->NameLength )))
continue;
size = query_reg_ascii_value( gpu_key, "ClassGUID", value, sizeof(buffer) );
if (size != sizeof(guid_devclass_displayW)
|| wcscmp( (WCHAR *)value->Data, guid_devclass_displayW ))
{
NtClose( gpu_key );
continue;
}
if (!(gpu = calloc( 1, sizeof(*gpu) )))
{
NtClose( gpu_key );
continue;
}
gpu->refcount = 1;
if ((prop_key = reg_open_ascii_key( gpu_key, devpropkey_gpu_luidA )))
{
if (query_reg_value( prop_key, NULL, value, sizeof(buffer) ) == sizeof(LUID))
gpu->luid = *(const LUID *)value->Data;
NtClose( prop_key );
}
list_add_tail( &gpus, &gpu->entry );
NtClose( gpu_key );
}
NtClose( device_key );
if (query_reg_value( prop_key, NULL, value, sizeof(buffer) ) == sizeof(LUID))
gpu->luid = *(const LUID *)value->Data;
NtClose( prop_key );
}
NtClose( pci_key );
NtClose( gpu_key );
}
for (adapter_id = 0;; adapter_id++)