/*
 * Unit tests for monitor APIs
 *
 * Copyright 2005 Huw Davies
 * Copyright 2008 Dmitry Timoshkov
 *
 * 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 "wine/test.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winreg.h"
#include <stdio.h>

static HMODULE hdll;
static LONG (WINAPI *pChangeDisplaySettingsExA)(LPCSTR, LPDEVMODEA, HWND, DWORD, LPVOID);
static LONG (WINAPI *pChangeDisplaySettingsExW)(LPCWSTR, LPDEVMODEW, HWND, DWORD, LPVOID);
static BOOL (WINAPI *pEnumDisplayDevicesA)(LPCSTR,DWORD,LPDISPLAY_DEVICEA,DWORD);
static BOOL (WINAPI *pEnumDisplayMonitors)(HDC,LPRECT,MONITORENUMPROC,LPARAM);
static BOOL (WINAPI *pGetMonitorInfoA)(HMONITOR,LPMONITORINFO);
static BOOL (WINAPI *pGetMonitorInfoW)(HMONITOR,LPMONITORINFO);
static HMONITOR (WINAPI *pMonitorFromPoint)(POINT,DWORD);
static HMONITOR (WINAPI *pMonitorFromRect)(LPCRECT,DWORD);
static HMONITOR (WINAPI *pMonitorFromWindow)(HWND,DWORD);
static LONG (WINAPI *pGetDisplayConfigBufferSizes)(UINT32,UINT32*,UINT32*);

static void init_function_pointers(void)
{
    hdll = GetModuleHandleA("user32.dll");

#define GET_PROC(func) \
    p ## func = (void*)GetProcAddress(hdll, #func); \
    if(!p ## func) \
      trace("GetProcAddress(%s) failed\n", #func);

    GET_PROC(ChangeDisplaySettingsExA)
    GET_PROC(ChangeDisplaySettingsExW)
    GET_PROC(EnumDisplayDevicesA)
    GET_PROC(EnumDisplayMonitors)
    GET_PROC(GetDisplayConfigBufferSizes)
    GET_PROC(GetMonitorInfoA)
    GET_PROC(GetMonitorInfoW)
    GET_PROC(MonitorFromPoint)
    GET_PROC(MonitorFromRect)
    GET_PROC(MonitorFromWindow)

#undef GET_PROC
}

static BOOL CALLBACK monitor_enum_proc(HMONITOR hmon, HDC hdc, LPRECT lprc,
                                       LPARAM lparam)
{
    MONITORINFOEXA mi;
    char *primary = (char *)lparam;

    mi.cbSize = sizeof(mi);

    ok(pGetMonitorInfoA(hmon, (MONITORINFO*)&mi), "GetMonitorInfo failed\n");
    if (mi.dwFlags & MONITORINFOF_PRIMARY)
        strcpy(primary, mi.szDevice);

    return TRUE;
}

static int adapter_count = 0;
static int monitor_count = 0;

static void test_enumdisplaydevices_adapter(int index, const DISPLAY_DEVICEA *device, DWORD flags)
{
    char video_name[32];
    char video_value[128];
    char buffer[128];
    int number;
    int vendor_id;
    int device_id;
    int subsys_id;
    int revision_id;
    size_t length;
    HKEY hkey;
    HDC hdc;
    DWORD size;
    LSTATUS ls;

    adapter_count++;

    /* DeviceName */
    ok(sscanf(device->DeviceName, "\\\\.\\DISPLAY%d", &number) == 1, "#%d: wrong DeviceName %s\n", index,
       device->DeviceName);

    /* DeviceKey */
    /* win7 is the only OS version where \Device\Video? value in HLKM\HARDWARE\DEVICEMAP\VIDEO are not in order with adapter index. */
    if (GetVersion() != 0x1db10106 || !strcmp(winetest_platform, "wine"))
    {
        sprintf(video_name, "\\Device\\Video%d", index);
        ls = RegOpenKeyExA(HKEY_LOCAL_MACHINE, "HARDWARE\\DEVICEMAP\\VIDEO", 0, KEY_READ, &hkey);
        ok(!ls, "#%d: failed to open registry, error: %#x\n", index, ls);
        if (!ls)
        {
            memset(video_value, 0, sizeof(video_value));
            size = sizeof(video_value);
            ls = RegQueryValueExA(hkey, video_name, NULL, NULL, (unsigned char *)video_value, &size);
            ok(!ls, "#%d: failed to get registry value, error: %#x\n", index, ls);
            RegCloseKey(hkey);
            ok(!strcmp(video_value, device->DeviceKey), "#%d: wrong DeviceKey: %s\n", index, device->DeviceKey);
        }
    }
    else
        ok(sscanf(device->DeviceKey, "\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Video\\%[^\\]\\%04d", buffer, &number) == 2,
           "#%d: wrong DeviceKey %s\n", index, device->DeviceKey);

    /* DeviceString */
    length = strlen(device->DeviceString);
    ok(broken(length == 0) || /* XP on Testbot will return an empty string, whereas XP on real machine doesn't. Probably a bug in virtual adapter driver */
       length > 0, "#%d: expect DeviceString not empty\n", index);

    /* StateFlags */
    if (index == 0)
        ok(device->StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE, "#%d: adapter should be primary\n", index);
    else
        ok(!(device->StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE), "#%d: adapter should not be primary\n", index);

    if (device->StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)
    {
        /* Test creating DC */
        hdc = CreateDCA(device->DeviceName, NULL, NULL, NULL);
        ok(hdc != NULL, "#%d: failed to CreateDC(\"%s\") err=%d\n", index, device->DeviceName, GetLastError());
        DeleteDC(hdc);
    }

    /* DeviceID */
    /* DeviceID should equal to the first string of HardwareID value data in PCI GPU instance. You can verify this
     * by changing the data and rerun EnumDisplayDevices. But it's difficult to find corresponding PCI device on
     * userland. So here we check the expected format instead. */
    if (flags & EDD_GET_DEVICE_INTERFACE_NAME)
        ok(strlen(device->DeviceID) == 0 || /* vista+ */
           sscanf(device->DeviceID, "PCI\\VEN_%04X&DEV_%04X&SUBSYS_%08X&REV_%02X",
                  &vendor_id, &device_id, &subsys_id, &revision_id) == 4, /* XP/2003 ignores EDD_GET_DEVICE_INTERFACE_NAME */
           "#%d: got %s\n", index, device->DeviceID);
    else
    {
        ok(broken(strlen(device->DeviceID) == 0) || /* XP on Testbot returns an empty string, whereas real machine doesn't */
           sscanf(device->DeviceID, "PCI\\VEN_%04X&DEV_%04X&SUBSYS_%08X&REV_%02X", &vendor_id, &device_id, &subsys_id,
                  &revision_id) == 4, "#%d: wrong DeviceID %s\n", index, device->DeviceID);
    }
}

static void test_enumdisplaydevices_monitor(int adapter_index, int monitor_index, const char *adapter_name,
                                            const DISPLAY_DEVICEA *device, DWORD flags)
{
    static const char device_id_prefix[] = "MONITOR\\Default_Monitor\\{4d36e96e-e325-11ce-bfc1-08002be10318}\\";
    static const char device_key_prefix[] = "\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Class"
                                            "\\{4d36e96e-e325-11ce-bfc1-08002be10318}\\";
    char monitor_name[32];
    char buffer[128];
    int number;

    monitor_count++;

    /* DeviceName */
    lstrcpyA(monitor_name, adapter_name);
    sprintf(monitor_name + strlen(monitor_name), "\\Monitor%d", monitor_index);
    ok(!strcmp(monitor_name, device->DeviceName), "#%d: expect %s, got %s\n", monitor_index, monitor_name, device->DeviceName);

    /* DeviceString */
    ok(strlen(device->DeviceString) > 0, "#%d: expect DeviceString not empty\n", monitor_index);

    /* StateFlags */
    if (adapter_index == 0 && monitor_index == 0)
        ok(device->StateFlags & DISPLAY_DEVICE_ATTACHED, "#%d expect to have a primary monitor attached\n", monitor_index);
    else
        ok(device->StateFlags <= (DISPLAY_DEVICE_ATTACHED | DISPLAY_DEVICE_ACTIVE), "#%d wrong state %#x\n", monitor_index,
           device->StateFlags);

    /* DeviceID */
    lstrcpynA(buffer, device->DeviceID, sizeof(device_id_prefix));
    if (flags & EDD_GET_DEVICE_INTERFACE_NAME)
    {   /* HKLM\SYSTEM\CurrentControlSet\Enum\DISPLAY\Default_Monitor\4&2abfaa30&0&UID0 GUID_DEVINTERFACE_MONITOR
         *                                                   ^                ^                     ^
         * Expect format                  \\?\DISPLAY#Default_Monitor#4&2abfaa30&0&UID0#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7} */
        ok(strlen(device->DeviceID) == 0 || /* vista ~ win7 */
            sscanf(device->DeviceID, "\\\\?\\DISPLAY#Default_Monitor#%[^#]#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}", buffer) == 1 || /* win8+ */
            (!lstrcmpiA(buffer, device_id_prefix) &&
             sscanf(device->DeviceID + sizeof(device_id_prefix) - 1, "%04d", &number) == 1), /* XP/2003 ignores EDD_GET_DEVICE_INTERFACE_NAME */
            "#%d: wrong DeviceID : %s\n", monitor_index, device->DeviceID);
    }
    else
    {
        /* Expect HarewareID value data + Driver value data in HKLM\SYSTEM\CurrentControlSet\Enum\DISPLAY\Default_Monitor\{Instance} */
        /* But we don't know which monitor instance this belongs to, so check format instead */
        ok(!lstrcmpiA(buffer, device_id_prefix), "#%d wrong DeviceID : %s\n", monitor_index, device->DeviceID);
        ok(sscanf(device->DeviceID + sizeof(device_id_prefix) - 1, "%04d", &number) == 1,
           "#%d wrong DeviceID : %s\n", monitor_index, device->DeviceID);
    }

    /* DeviceKey */
    lstrcpynA(buffer, device->DeviceKey, sizeof(device_key_prefix));
    ok(!lstrcmpiA(buffer, device_key_prefix), "#%d: wrong DeviceKey : %s\n", monitor_index, device->DeviceKey);
    ok(sscanf(device->DeviceKey + sizeof(device_key_prefix) - 1, "%04d", &number) == 1,
       "#%d wrong DeviceKey : %s\n", monitor_index, device->DeviceKey);
}

static void test_enumdisplaydevices(void)
{
    static const DWORD flags[] = {0, EDD_GET_DEVICE_INTERFACE_NAME};
    DISPLAY_DEVICEA dd;
    char primary_device_name[32];
    char primary_monitor_device_name[32];
    char adapter_name[32];
    int number;
    int flag_index;
    int adapter_index;
    int monitor_index;
    BOOL ret;

    if (!pEnumDisplayDevicesA)
    {
        win_skip("EnumDisplayDevicesA is not available\n");
        return;
    }

    /* Doesn't accept \\.\DISPLAY */
    dd.cb = sizeof(dd);
    ret = pEnumDisplayDevicesA("\\\\.\\DISPLAY", 0, &dd, 0);
    ok(!ret, "Expect failure\n");

    /* Enumeration */
    for (flag_index = 0; flag_index < ARRAY_SIZE(flags); flag_index++)
        for (adapter_index = 0; pEnumDisplayDevicesA(NULL, adapter_index, &dd, flags[flag_index]); adapter_index++)
        {
            lstrcpyA(adapter_name, dd.DeviceName);

            if (sscanf(adapter_name, "\\\\.\\DISPLAYV%d", &number) == 1)
            {
                skip("Skipping software devices %s:%s\n", adapter_name, dd.DeviceString);
                continue;
            }

            test_enumdisplaydevices_adapter(adapter_index, &dd, flags[flag_index]);

            for (monitor_index = 0; pEnumDisplayDevicesA(adapter_name, monitor_index, &dd, flags[flag_index]);
                 monitor_index++)
                test_enumdisplaydevices_monitor(adapter_index, monitor_index, adapter_name, &dd, flags[flag_index]);
        }

    ok(adapter_count > 0, "Expect at least one adapter found\n");
    /* XP on Testbot doesn't report a monitor, whereas XP on real machine does */
    ok(broken(monitor_count == 0) || monitor_count > 0, "Expect at least one monitor found\n");

    if (!pEnumDisplayMonitors || !pGetMonitorInfoA)
    {
        win_skip("EnumDisplayMonitors or GetMonitorInfoA are not available\n");
        return;
    }

    ret = pEnumDisplayDevicesA(NULL, 0, &dd, 0);
    ok(ret, "Expect success\n");
    lstrcpyA(primary_device_name, dd.DeviceName);

    primary_monitor_device_name[0] = 0;
    ret = pEnumDisplayMonitors(NULL, NULL, monitor_enum_proc, (LPARAM)primary_monitor_device_name);
    ok(ret, "EnumDisplayMonitors failed\n");
    ok(!strcmp(primary_monitor_device_name, primary_device_name),
       "monitor device name %s, device name %s\n", primary_monitor_device_name,
       primary_device_name);
}

struct vid_mode
{
    DWORD w, h, bpp, freq, fields;
    BOOL must_succeed;
};

static const struct vid_mode vid_modes_test[] = {
    {640, 480, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY, 0},
    {640, 480, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT |                 DM_DISPLAYFREQUENCY, 1},
    {640, 480, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL                      , 0},
    {640, 480, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT                                      , 1},
    {640, 480, 0, 0,                                DM_BITSPERPEL                      , 0},
    {640, 480, 0, 0,                                                DM_DISPLAYFREQUENCY, 0},

    {0, 0, 0, 0, DM_PELSWIDTH, 0},
    {0, 0, 0, 0, DM_PELSHEIGHT, 0},

    {640, 480, 0, 0, DM_PELSWIDTH, 0},
    {640, 480, 0, 0, DM_PELSHEIGHT, 0},
    {  0, 480, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT, 0},
    {640,   0, 0, 0, DM_PELSWIDTH | DM_PELSHEIGHT, 0},

    /* the following test succeeds under XP SP3
    {0, 0, 0, 0, DM_DISPLAYFREQUENCY, 0}
    */
};

static void test_ChangeDisplaySettingsEx(void)
{
    DEVMODEA dm;
    DEVMODEW dmW;
    DWORD width;
    LONG res;
    int i;

    if (!pChangeDisplaySettingsExA)
    {
        win_skip("ChangeDisplaySettingsExA is not available\n");
        return;
    }

    SetLastError(0xdeadbeef);
    res = EnumDisplaySettingsA(NULL, ENUM_CURRENT_SETTINGS, &dm);
    ok(res, "EnumDisplaySettings error %u\n", GetLastError());

    width = dm.dmPelsWidth;

    dm.dmDriverExtra = 1;
    res = ChangeDisplaySettingsA(&dm, CDS_TEST);
    ok(res == DISP_CHANGE_SUCCESSFUL,
       "ChangeDisplaySettingsA returned %d, expected DISP_CHANGE_SUCCESSFUL\n", res);
    ok(dm.dmDriverExtra == 0 || broken(dm.dmDriverExtra == 1) /* win9x */,
       "ChangeDisplaySettingsA didn't reset dmDriverExtra to 0\n");

    /* crashes under XP SP3 for large dmDriverExtra values */
    dm.dmDriverExtra = 1;
    res = pChangeDisplaySettingsExA(NULL, &dm, NULL, CDS_TEST, NULL);
    ok(res == DISP_CHANGE_SUCCESSFUL,
       "ChangeDisplaySettingsExW returned %d, expected DISP_CHANGE_SUCCESSFUL\n", res);
    ok(dm.dmDriverExtra == 1, "ChangeDisplaySettingsExA shouldn't reset dmDriverExtra to 0\n");

    memset(&dmW, 0, sizeof(dmW));
    dmW.dmSize = sizeof(dmW);
    dmW.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
    dmW.dmPelsWidth = dm.dmPelsWidth;
    dmW.dmPelsHeight = dm.dmPelsHeight;
    dmW.dmDriverExtra = 1;
    SetLastError(0xdeadbeef);
    res = ChangeDisplaySettingsW(&dmW, CDS_TEST);
    if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
    {
        ok(res == DISP_CHANGE_SUCCESSFUL,
           "ChangeDisplaySettingsW returned %d, expected DISP_CHANGE_SUCCESSFUL\n", res);
        ok(dmW.dmDriverExtra == 0, "ChangeDisplaySettingsW didn't reset dmDriverExtra to 0\n");
    }

    /* Apparently XP treats dmDriverExtra being != 0 as an error */
    dmW.dmDriverExtra = 1;
    res = pChangeDisplaySettingsExW(NULL, &dmW, NULL, CDS_TEST, NULL);
    if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
    {
        ok(res == DISP_CHANGE_SUCCESSFUL,
           "ChangeDisplaySettingsExW returned %d, expected DISP_CHANGE_SUCCESSFUL\n", res);
        ok(dmW.dmDriverExtra == 1, "ChangeDisplaySettingsExW shouldn't reset dmDriverExtra to 0\n");
    }

    /* the following 2 tests show that dm.dmSize being 0 is invalid, but
     * ChangeDisplaySettingsExA still reports success.
     */
    memset(&dm, 0, sizeof(dm));
    dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
    dm.dmPelsWidth = width;
    res = pChangeDisplaySettingsExA(NULL, &dm, NULL, CDS_TEST, NULL);
    ok(res == DISP_CHANGE_SUCCESSFUL ||
       res == DISP_CHANGE_BADMODE || /* Win98, WinMe */
       res == DISP_CHANGE_FAILED, /* NT4 */
       "ChangeDisplaySettingsExA returned unexpected %d\n", res);

    memset(&dmW, 0, sizeof(dmW));
    dmW.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
    dmW.dmPelsWidth = width;
    SetLastError(0xdeadbeef);
    res = pChangeDisplaySettingsExW(NULL, &dmW, NULL, CDS_TEST, NULL);
    if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
        ok(res == DISP_CHANGE_FAILED ||
           res == DISP_CHANGE_BADPARAM ||  /* NT4 */
           res == DISP_CHANGE_BADMODE /* XP SP3 */,
           "ChangeDisplaySettingsExW returned %d\n", res);

    memset(&dm, 0, sizeof(dm));
    dm.dmSize = sizeof(dm);

    for (i = 0; i < ARRAY_SIZE(vid_modes_test); i++)
    {
        dm.dmPelsWidth        = vid_modes_test[i].w;
        dm.dmPelsHeight       = vid_modes_test[i].h;
        dm.dmBitsPerPel       = vid_modes_test[i].bpp;
        dm.dmDisplayFrequency = vid_modes_test[i].freq;
        dm.dmFields           = vid_modes_test[i].fields;
        res = pChangeDisplaySettingsExA(NULL, &dm, NULL, CDS_TEST, NULL);
        ok(vid_modes_test[i].must_succeed ?
           (res == DISP_CHANGE_SUCCESSFUL || res == DISP_CHANGE_RESTART) :
           (res == DISP_CHANGE_SUCCESSFUL || res == DISP_CHANGE_RESTART ||
            res == DISP_CHANGE_BADMODE || res == DISP_CHANGE_BADPARAM),
           "Unexpected ChangeDisplaySettingsEx() return code for resolution[%d]: %d\n", i, res);

        if (res == DISP_CHANGE_SUCCESSFUL)
        {
            RECT r, r1, virt;

            SetRect(&virt, 0, 0, GetSystemMetrics(SM_CXVIRTUALSCREEN), GetSystemMetrics(SM_CYVIRTUALSCREEN));
            if (IsRectEmpty(&virt))  /* NT4 doesn't have SM_CX/YVIRTUALSCREEN */
                SetRect(&virt, 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));
            OffsetRect(&virt, GetSystemMetrics(SM_XVIRTUALSCREEN), GetSystemMetrics(SM_YVIRTUALSCREEN));

            /* Resolution change resets clip rect */
            ok(GetClipCursor(&r), "GetClipCursor() failed\n");
            ok(EqualRect(&r, &virt), "Invalid clip rect: %s\n", wine_dbgstr_rect(&r));

            if (!ClipCursor(NULL)) continue;
            ok(GetClipCursor(&r), "GetClipCursor() failed\n");
            ok(EqualRect(&r, &virt), "Invalid clip rect: %s\n", wine_dbgstr_rect(&r));

            /* This should always work. Primary monitor is at (0,0) */
            SetRect(&r1, 10, 10, 20, 20);
            ok(ClipCursor(&r1), "ClipCursor() failed\n");
            ok(GetClipCursor(&r), "GetClipCursor() failed\n");
            ok(EqualRect(&r, &r1), "Invalid clip rect: %s\n", wine_dbgstr_rect(&r));
            SetRect(&r1, 10, 10, 10, 10);
            ok(ClipCursor(&r1), "ClipCursor() failed\n");
            ok(GetClipCursor(&r), "GetClipCursor() failed\n");
            ok(EqualRect(&r, &r1), "Invalid clip rect: %s\n", wine_dbgstr_rect(&r));
            SetRect(&r1, 10, 10, 10, 9);
            ok(!ClipCursor(&r1), "ClipCursor() succeeded\n");
            /* Windows bug: further clipping fails once an empty rect is set, so we have to reset it */
            ClipCursor(NULL);

            SetRect(&r1, virt.left - 10, virt.top - 10, virt.right + 20, virt.bottom + 20);
            ok(ClipCursor(&r1), "ClipCursor() failed\n");
            ok(GetClipCursor(&r), "GetClipCursor() failed\n");
            ok(EqualRect(&r, &virt) || broken(EqualRect(&r, &r1)) /* win9x */,
               "Invalid clip rect: %s\n", wine_dbgstr_rect(&r));
            ClipCursor(&virt);
        }
    }
    res = pChangeDisplaySettingsExA(NULL, NULL, NULL, CDS_RESET, NULL);
    ok(res == DISP_CHANGE_SUCCESSFUL, "Failed to reset default resolution: %d\n", res);
}

static void test_monitors(void)
{
    HMONITOR monitor, primary, nearest;
    POINT pt;
    RECT rc;
    MONITORINFO mi;
    MONITORINFOEXA miexa;
    MONITORINFOEXW miexw;
    BOOL ret;
    DWORD i;

    static const struct
    {
        DWORD cbSize;
        BOOL ret;
    } testdatami[] = {
        {0, FALSE},
        {sizeof(MONITORINFO)+1, FALSE},
        {sizeof(MONITORINFO)-1, FALSE},
        {sizeof(MONITORINFO), TRUE},
        {-1, FALSE},
        {0xdeadbeef, FALSE},
    },
    testdatamiexa[] = {
        {0, FALSE},
        {sizeof(MONITORINFOEXA)+1, FALSE},
        {sizeof(MONITORINFOEXA)-1, FALSE},
        {sizeof(MONITORINFOEXA), TRUE},
        {-1, FALSE},
        {0xdeadbeef, FALSE},
    },
    testdatamiexw[] = {
        {0, FALSE},
        {sizeof(MONITORINFOEXW)+1, FALSE},
        {sizeof(MONITORINFOEXW)-1, FALSE},
        {sizeof(MONITORINFOEXW), TRUE},
        {-1, FALSE},
        {0xdeadbeef, FALSE},
    };

    if (!pMonitorFromPoint || !pMonitorFromWindow || !pMonitorFromRect)
    {
        win_skip("MonitorFromPoint, MonitorFromWindow, or MonitorFromRect is not available\n");
        return;
    }

    pt.x = pt.y = 0;
    primary = pMonitorFromPoint( pt, MONITOR_DEFAULTTOPRIMARY );
    ok( primary != 0, "couldn't get primary monitor\n" );

    monitor = pMonitorFromWindow( 0, MONITOR_DEFAULTTONULL );
    ok( !monitor, "got %p, should not get a monitor for an invalid window\n", monitor );
    monitor = pMonitorFromWindow( 0, MONITOR_DEFAULTTOPRIMARY );
    ok( monitor == primary, "got %p, should get primary %p for MONITOR_DEFAULTTOPRIMARY\n", monitor, primary );
    monitor = pMonitorFromWindow( 0, MONITOR_DEFAULTTONEAREST );
    ok( monitor == primary, "got %p, should get primary %p for MONITOR_DEFAULTTONEAREST\n", monitor, primary );

    SetRect( &rc, 0, 0, 1, 1 );
    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTOPRIMARY );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONEAREST );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    /* Empty rect at 0,0 is considered inside the primary monitor */
    SetRect( &rc, 0, 0, -1, -1 );
    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    /* Even if there is a monitor left of the primary, the primary will have the most overlapping area */
    SetRect( &rc, -1, 0, 2, 1 );
    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    /* But the width of the rect doesn't matter if it's empty. */
    SetRect( &rc, -1, 0, 2, -1 );
    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    ok( monitor != primary, "got primary %p\n", monitor );

    if (!pGetMonitorInfoA)
    {
        win_skip("GetMonitorInfoA is not available\n");
        return;
    }

    /* Search for a monitor that has no others equally near to (left, top-1) */
    SetRect( &rc, -1, -2, 2, 0 );
    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    nearest = primary;
    while (monitor != NULL)
    {
        ok( monitor != primary, "got primary %p\n", monitor );
        nearest = monitor;
        mi.cbSize = sizeof(mi);
        ret = pGetMonitorInfoA( monitor, &mi );
        ok( ret, "GetMonitorInfo failed\n" );
        SetRect( &rc, mi.rcMonitor.left-1, mi.rcMonitor.top-2, mi.rcMonitor.left+2, mi.rcMonitor.top );
        monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    }

    /* tests for cbSize in MONITORINFO */
    monitor = pMonitorFromWindow( 0, MONITOR_DEFAULTTOPRIMARY );
    for (i = 0; i < ARRAY_SIZE(testdatami); i++)
    {
        memset( &mi, 0, sizeof(mi) );
        mi.cbSize = testdatami[i].cbSize;
        ret = pGetMonitorInfoA( monitor, &mi );
        ok( ret == testdatami[i].ret, "GetMonitorInfo returned wrong value\n" );
        if (ret)
            ok( (mi.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag isn't set\n" );
        else
            ok( !(mi.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag is set\n" );

        memset( &miexw, 0, sizeof(miexw) );
        miexw.cbSize = testdatamiexw[i].cbSize;
        ret = pGetMonitorInfoW( monitor, (LPMONITORINFO)&miexw );
        ok( ret == testdatamiexw[i].ret, "GetMonitorInfo returned wrong value\n" );
        if (ret)
            ok( (miexw.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag isn't set\n" );
        else
            ok( !(miexw.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag is set\n" );
    }

    /* tests for cbSize in MONITORINFOEXA */
    for (i = 0; i < ARRAY_SIZE(testdatamiexa); i++)
    {
        memset( &miexa, 0, sizeof(miexa) );
        miexa.cbSize = testdatamiexa[i].cbSize;
        ret = pGetMonitorInfoA( monitor, (LPMONITORINFO)&miexa );
        ok( ret == testdatamiexa[i].ret, "GetMonitorInfo returned wrong value\n" );
        if (ret)
            ok( (miexa.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag isn't set\n" );
        else
            ok( !(miexa.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag is set\n" );
    }

    /* tests for cbSize in MONITORINFOEXW */
    for (i = 0; i < ARRAY_SIZE(testdatamiexw); i++)
    {
        memset( &miexw, 0, sizeof(miexw) );
        miexw.cbSize = testdatamiexw[i].cbSize;
        ret = pGetMonitorInfoW( monitor, (LPMONITORINFO)&miexw );
        ok( ret == testdatamiexw[i].ret, "GetMonitorInfo returned wrong value\n" );
        if (ret)
            ok( (miexw.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag isn't set\n" );
        else
            ok( !(miexw.dwFlags & MONITORINFOF_PRIMARY), "MONITORINFOF_PRIMARY flag is set\n" );
    }

    SetRect( &rc, rc.left+1, rc.top+1, rc.left+2, rc.top+2 );

    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONULL );
    ok( monitor == NULL, "got %p\n", monitor );

    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTOPRIMARY );
    ok( monitor == primary, "got %p, should get primary %p\n", monitor, primary );

    monitor = pMonitorFromRect( &rc, MONITOR_DEFAULTTONEAREST );
    ok( monitor == nearest, "got %p, should get nearest %p\n", monitor, nearest );
}

static BOOL CALLBACK find_primary_mon(HMONITOR hmon, HDC hdc, LPRECT rc, LPARAM lp)
{
    MONITORINFO mi;
    BOOL ret;

    mi.cbSize = sizeof(mi);
    ret = pGetMonitorInfoA(hmon, &mi);
    ok(ret, "GetMonitorInfo failed\n");
    if (mi.dwFlags & MONITORINFOF_PRIMARY)
    {
        *(HMONITOR *)lp = hmon;
        return FALSE;
    }
    return TRUE;
}

static void test_work_area(void)
{
    HMONITOR hmon;
    MONITORINFO mi;
    RECT rc_work, rc_normal;
    HWND hwnd;
    WINDOWPLACEMENT wp;
    BOOL ret;

    if (!pEnumDisplayMonitors || !pGetMonitorInfoA)
    {
        win_skip("EnumDisplayMonitors or GetMonitorInfoA are not available\n");
        return;
    }

    hmon = 0;
    ret = pEnumDisplayMonitors(NULL, NULL, find_primary_mon, (LPARAM)&hmon);
    ok(!ret && hmon != 0, "Failed to find primary monitor\n");

    mi.cbSize = sizeof(mi);
    SetLastError(0xdeadbeef);
    ret = pGetMonitorInfoA(hmon, &mi);
    ok(ret, "GetMonitorInfo error %u\n", GetLastError());
    ok(mi.dwFlags & MONITORINFOF_PRIMARY, "not a primary monitor\n");
    trace("primary monitor %s\n", wine_dbgstr_rect(&mi.rcMonitor));

    SetLastError(0xdeadbeef);
    ret = SystemParametersInfoA(SPI_GETWORKAREA, 0, &rc_work, 0);
    ok(ret, "SystemParametersInfo error %u\n", GetLastError());
    trace("work area %s\n", wine_dbgstr_rect(&rc_work));
    ok(EqualRect(&rc_work, &mi.rcWork), "work area is different\n");

    hwnd = CreateWindowExA(0, "static", NULL, WS_OVERLAPPEDWINDOW|WS_VISIBLE,100,100,10,10,0,0,0,NULL);
    ok(hwnd != 0, "CreateWindowEx failed\n");

    ret = GetWindowRect(hwnd, &rc_normal);
    ok(ret, "GetWindowRect failed\n");
    trace("normal %s\n", wine_dbgstr_rect(&rc_normal));

    wp.length = sizeof(wp);
    ret = GetWindowPlacement(hwnd, &wp);
    ok(ret, "GetWindowPlacement failed\n");
    trace("min: %d,%d max %d,%d normal %s\n", wp.ptMinPosition.x, wp.ptMinPosition.y,
          wp.ptMaxPosition.x, wp.ptMaxPosition.y, wine_dbgstr_rect(&wp.rcNormalPosition));
    OffsetRect(&wp.rcNormalPosition, rc_work.left, rc_work.top);
    todo_wine_if (mi.rcMonitor.left != mi.rcWork.left ||
        mi.rcMonitor.top != mi.rcWork.top)  /* FIXME: remove once Wine is fixed */
    {
        ok(EqualRect(&rc_normal, &wp.rcNormalPosition), "normal pos is different\n");
    }

    SetWindowLongA(hwnd, GWL_EXSTYLE, WS_EX_TOOLWINDOW);

    wp.length = sizeof(wp);
    ret = GetWindowPlacement(hwnd, &wp);
    ok(ret, "GetWindowPlacement failed\n");
    trace("min: %d,%d max %d,%d normal %s\n", wp.ptMinPosition.x, wp.ptMinPosition.y,
          wp.ptMaxPosition.x, wp.ptMaxPosition.y, wine_dbgstr_rect(&wp.rcNormalPosition));
    ok(EqualRect(&rc_normal, &wp.rcNormalPosition), "normal pos is different\n");

    DestroyWindow(hwnd);
}

static void test_display_config(void)
{
    UINT32 paths, modes;
    LONG ret;

    if (!pGetDisplayConfigBufferSizes)
    {
        win_skip("GetDisplayConfigBufferSizes is not supported\n");
        return;
    }

    ret = pGetDisplayConfigBufferSizes(QDC_ALL_PATHS, NULL, NULL);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);

    paths = 100;
    ret = pGetDisplayConfigBufferSizes(QDC_ALL_PATHS, &paths, NULL);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);
    ok(paths == 100, "got %u\n", paths);

    modes = 100;
    ret = pGetDisplayConfigBufferSizes(QDC_ALL_PATHS, NULL, &modes);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);
    ok(modes == 100, "got %u\n", modes);

    paths = modes = 0;
    ret = pGetDisplayConfigBufferSizes(QDC_ALL_PATHS, &paths, &modes);
    if (!ret)
        ok(paths > 0 && modes > 0, "got %u, %u\n", paths, modes);
    else
        ok(ret == ERROR_NOT_SUPPORTED, "got %d\n", ret);

    /* Invalid flags, non-zero invalid flags validation is version (or driver?) dependent,
       it's unreliable to use in tests. */
    ret = pGetDisplayConfigBufferSizes(0, NULL, NULL);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);

    paths = 100;
    ret = pGetDisplayConfigBufferSizes(0, &paths, NULL);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);
    ok(paths == 100, "got %u\n", paths);

    modes = 100;
    ret = pGetDisplayConfigBufferSizes(0, NULL, &modes);
    ok(ret == ERROR_INVALID_PARAMETER, "got %d\n", ret);
    ok(modes == 100, "got %u\n", modes);

    paths = modes = 100;
    ret = pGetDisplayConfigBufferSizes(0, &paths, &modes);
    ok(ret == ERROR_INVALID_PARAMETER || ret == ERROR_NOT_SUPPORTED, "got %d\n", ret);
    ok((modes == 0 || modes == 100) && paths == 0, "got %u, %u\n", modes, paths);
}

START_TEST(monitor)
{
    init_function_pointers();
    test_enumdisplaydevices();
    test_ChangeDisplaySettingsEx();
    test_monitors();
    test_work_area();
    test_display_config();
}