| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| #if defined(SDL_VIDEO_DRIVER_WINDOWS) && !defined(__XBOXONE__) && !defined(__XBOXSERIES__) |
| |
| #include "SDL_windowsvideo.h" |
| #include "../../events/SDL_displayevents_c.h" |
| |
| /* Windows CE compatibility */ |
| #ifndef CDS_FULLSCREEN |
| #define CDS_FULLSCREEN 0 |
| #endif |
| |
| /* #define DEBUG_MODES */ |
| /* #define HIGHDPI_DEBUG_VERBOSE */ |
| |
| static void WIN_UpdateDisplayMode(_THIS, LPCWSTR deviceName, DWORD index, SDL_DisplayMode *mode) |
| { |
| SDL_DisplayModeData *data = (SDL_DisplayModeData *)mode->driverdata; |
| HDC hdc; |
| |
| data->DeviceMode.dmFields = |
| (DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY | |
| DM_DISPLAYFLAGS); |
| |
| /* NOLINTNEXTLINE(bugprone-assignment-in-if-condition): No simple way to extract the assignment */ |
| if (index == ENUM_CURRENT_SETTINGS && (hdc = CreateDC(deviceName, NULL, NULL, NULL)) != NULL) { |
| char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)]; |
| LPBITMAPINFO bmi; |
| HBITMAP hbm; |
| int logical_width = GetDeviceCaps(hdc, HORZRES); |
| int logical_height = GetDeviceCaps(hdc, VERTRES); |
| |
| /* High-DPI notes: |
| |
| If DPI-unaware: |
| - GetDeviceCaps( hdc, HORZRES ) will return the monitor width in points. |
| - DeviceMode.dmPelsWidth is actual pixels (unlike almost all other Windows API's, |
| it's not virtualized when DPI unaware). |
| |
| If DPI-aware: |
| - GetDeviceCaps( hdc, HORZRES ) will return pixels, same as DeviceMode.dmPelsWidth */ |
| mode->w = logical_width; |
| mode->h = logical_height; |
| |
| SDL_zeroa(bmi_data); |
| bmi = (LPBITMAPINFO)bmi_data; |
| bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
| |
| hbm = CreateCompatibleBitmap(hdc, 1, 1); |
| GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS); |
| GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS); |
| DeleteObject(hbm); |
| DeleteDC(hdc); |
| if (bmi->bmiHeader.biCompression == BI_BITFIELDS) { |
| switch (*(Uint32 *)bmi->bmiColors) { |
| case 0x00FF0000: |
| mode->format = SDL_PIXELFORMAT_RGB888; |
| break; |
| case 0x000000FF: |
| mode->format = SDL_PIXELFORMAT_BGR888; |
| break; |
| case 0xF800: |
| mode->format = SDL_PIXELFORMAT_RGB565; |
| break; |
| case 0x7C00: |
| mode->format = SDL_PIXELFORMAT_RGB555; |
| break; |
| } |
| } else if (bmi->bmiHeader.biBitCount == 8) { |
| mode->format = SDL_PIXELFORMAT_INDEX8; |
| } else if (bmi->bmiHeader.biBitCount == 4) { |
| mode->format = SDL_PIXELFORMAT_INDEX4LSB; |
| } |
| } else if (mode->format == SDL_PIXELFORMAT_UNKNOWN) { |
| /* FIXME: Can we tell what this will be? */ |
| if ((data->DeviceMode.dmFields & DM_BITSPERPEL) == DM_BITSPERPEL) { |
| switch (data->DeviceMode.dmBitsPerPel) { |
| case 32: |
| mode->format = SDL_PIXELFORMAT_RGB888; |
| break; |
| case 24: |
| mode->format = SDL_PIXELFORMAT_RGB24; |
| break; |
| case 16: |
| mode->format = SDL_PIXELFORMAT_RGB565; |
| break; |
| case 15: |
| mode->format = SDL_PIXELFORMAT_RGB555; |
| break; |
| case 8: |
| mode->format = SDL_PIXELFORMAT_INDEX8; |
| break; |
| case 4: |
| mode->format = SDL_PIXELFORMAT_INDEX4LSB; |
| break; |
| } |
| } |
| } |
| } |
| |
| static SDL_DisplayOrientation WIN_GetDisplayOrientation(DEVMODE *mode) |
| { |
| int width = mode->dmPelsWidth; |
| int height = mode->dmPelsHeight; |
| |
| /* Use unrotated width/height to guess orientation */ |
| if (mode->dmDisplayOrientation == DMDO_90 || mode->dmDisplayOrientation == DMDO_270) { |
| int temp = width; |
| width = height; |
| height = temp; |
| } |
| |
| if (width >= height) { |
| switch (mode->dmDisplayOrientation) { |
| case DMDO_DEFAULT: |
| return SDL_ORIENTATION_LANDSCAPE; |
| case DMDO_90: |
| return SDL_ORIENTATION_PORTRAIT; |
| case DMDO_180: |
| return SDL_ORIENTATION_LANDSCAPE_FLIPPED; |
| case DMDO_270: |
| return SDL_ORIENTATION_PORTRAIT_FLIPPED; |
| default: |
| return SDL_ORIENTATION_UNKNOWN; |
| } |
| } else { |
| switch (mode->dmDisplayOrientation) { |
| case DMDO_DEFAULT: |
| return SDL_ORIENTATION_PORTRAIT; |
| case DMDO_90: |
| return SDL_ORIENTATION_LANDSCAPE_FLIPPED; |
| case DMDO_180: |
| return SDL_ORIENTATION_PORTRAIT_FLIPPED; |
| case DMDO_270: |
| return SDL_ORIENTATION_LANDSCAPE; |
| default: |
| return SDL_ORIENTATION_UNKNOWN; |
| } |
| } |
| } |
| |
| static SDL_bool WIN_GetDisplayMode(_THIS, LPCWSTR deviceName, DWORD index, SDL_DisplayMode *mode, SDL_DisplayOrientation *orientation) |
| { |
| SDL_DisplayModeData *data; |
| DEVMODE devmode; |
| |
| devmode.dmSize = sizeof(devmode); |
| devmode.dmDriverExtra = 0; |
| if (!EnumDisplaySettingsW(deviceName, index, &devmode)) { |
| return SDL_FALSE; |
| } |
| |
| data = (SDL_DisplayModeData *)SDL_malloc(sizeof(*data)); |
| if (!data) { |
| return SDL_FALSE; |
| } |
| |
| mode->driverdata = data; |
| data->DeviceMode = devmode; |
| |
| mode->format = SDL_PIXELFORMAT_UNKNOWN; |
| mode->w = data->DeviceMode.dmPelsWidth; |
| mode->h = data->DeviceMode.dmPelsHeight; |
| mode->refresh_rate = data->DeviceMode.dmDisplayFrequency; |
| |
| /* Fill in the mode information */ |
| WIN_UpdateDisplayMode(_this, deviceName, index, mode); |
| |
| if (orientation) { |
| *orientation = WIN_GetDisplayOrientation(&devmode); |
| } |
| |
| return SDL_TRUE; |
| } |
| |
| /* The win32 API calls in this function require Windows Vista or later. */ |
| /* *INDENT-OFF* */ /* clang-format off */ |
| typedef LONG (WINAPI *SDL_WIN32PROC_GetDisplayConfigBufferSizes)(UINT32 flags, UINT32* numPathArrayElements, UINT32* numModeInfoArrayElements); |
| typedef LONG (WINAPI *SDL_WIN32PROC_QueryDisplayConfig)(UINT32 flags, UINT32* numPathArrayElements, DISPLAYCONFIG_PATH_INFO* pathArray, UINT32* numModeInfoArrayElements, DISPLAYCONFIG_MODE_INFO* modeInfoArray, DISPLAYCONFIG_TOPOLOGY_ID* currentTopologyId); |
| typedef LONG (WINAPI *SDL_WIN32PROC_DisplayConfigGetDeviceInfo)(DISPLAYCONFIG_DEVICE_INFO_HEADER* requestPacket); |
| /* *INDENT-ON* */ /* clang-format on */ |
| |
| static char *WIN_GetDisplayNameVista(const WCHAR *deviceName) |
| { |
| void *dll; |
| SDL_WIN32PROC_GetDisplayConfigBufferSizes pGetDisplayConfigBufferSizes; |
| SDL_WIN32PROC_QueryDisplayConfig pQueryDisplayConfig; |
| SDL_WIN32PROC_DisplayConfigGetDeviceInfo pDisplayConfigGetDeviceInfo; |
| DISPLAYCONFIG_PATH_INFO *paths = NULL; |
| DISPLAYCONFIG_MODE_INFO *modes = NULL; |
| char *retval = NULL; |
| UINT32 pathCount = 0; |
| UINT32 modeCount = 0; |
| UINT32 i; |
| LONG rc; |
| |
| dll = SDL_LoadObject("USER32.DLL"); |
| if (!dll) { |
| return NULL; |
| } |
| |
| pGetDisplayConfigBufferSizes = (SDL_WIN32PROC_GetDisplayConfigBufferSizes)SDL_LoadFunction(dll, "GetDisplayConfigBufferSizes"); |
| pQueryDisplayConfig = (SDL_WIN32PROC_QueryDisplayConfig)SDL_LoadFunction(dll, "QueryDisplayConfig"); |
| pDisplayConfigGetDeviceInfo = (SDL_WIN32PROC_DisplayConfigGetDeviceInfo)SDL_LoadFunction(dll, "DisplayConfigGetDeviceInfo"); |
| |
| if (!pGetDisplayConfigBufferSizes || !pQueryDisplayConfig || !pDisplayConfigGetDeviceInfo) { |
| goto WIN_GetDisplayNameVista_failed; |
| } |
| |
| do { |
| rc = pGetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &pathCount, &modeCount); |
| if (rc != ERROR_SUCCESS) { |
| goto WIN_GetDisplayNameVista_failed; |
| } |
| |
| SDL_free(paths); |
| SDL_free(modes); |
| |
| paths = (DISPLAYCONFIG_PATH_INFO *)SDL_malloc(sizeof(DISPLAYCONFIG_PATH_INFO) * pathCount); |
| modes = (DISPLAYCONFIG_MODE_INFO *)SDL_malloc(sizeof(DISPLAYCONFIG_MODE_INFO) * modeCount); |
| if ((!paths) || (!modes)) { |
| goto WIN_GetDisplayNameVista_failed; |
| } |
| |
| rc = pQueryDisplayConfig(QDC_ONLY_ACTIVE_PATHS, &pathCount, paths, &modeCount, modes, 0); |
| } while (rc == ERROR_INSUFFICIENT_BUFFER); |
| |
| if (rc == ERROR_SUCCESS) { |
| for (i = 0; i < pathCount; i++) { |
| DISPLAYCONFIG_SOURCE_DEVICE_NAME sourceName; |
| DISPLAYCONFIG_TARGET_DEVICE_NAME targetName; |
| |
| SDL_zero(sourceName); |
| sourceName.header.adapterId = paths[i].targetInfo.adapterId; |
| sourceName.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME; |
| sourceName.header.size = sizeof(sourceName); |
| sourceName.header.id = paths[i].sourceInfo.id; |
| rc = pDisplayConfigGetDeviceInfo(&sourceName.header); |
| if (rc != ERROR_SUCCESS) { |
| break; |
| } else if (SDL_wcscmp(deviceName, sourceName.viewGdiDeviceName) != 0) { |
| continue; |
| } |
| |
| SDL_zero(targetName); |
| targetName.header.adapterId = paths[i].targetInfo.adapterId; |
| targetName.header.id = paths[i].targetInfo.id; |
| targetName.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME; |
| targetName.header.size = sizeof(targetName); |
| rc = pDisplayConfigGetDeviceInfo(&targetName.header); |
| if (rc == ERROR_SUCCESS) { |
| retval = WIN_StringToUTF8W(targetName.monitorFriendlyDeviceName); |
| /* if we got an empty string, treat it as failure so we'll fallback |
| to getting the generic name. */ |
| if (retval && (*retval == '\0')) { |
| SDL_free(retval); |
| retval = NULL; |
| } |
| } |
| break; |
| } |
| } |
| |
| SDL_free(paths); |
| SDL_free(modes); |
| SDL_UnloadObject(dll); |
| return retval; |
| |
| WIN_GetDisplayNameVista_failed: |
| SDL_free(retval); |
| SDL_free(paths); |
| SDL_free(modes); |
| SDL_UnloadObject(dll); |
| return NULL; |
| } |
| |
| static void WIN_AddDisplay(_THIS, HMONITOR hMonitor, const MONITORINFOEXW *info, int *display_index, SDL_bool send_event) |
| { |
| int i, index = *display_index; |
| SDL_VideoDisplay display; |
| SDL_DisplayData *displaydata; |
| SDL_DisplayMode mode; |
| SDL_DisplayOrientation orientation; |
| |
| #ifdef DEBUG_MODES |
| SDL_Log("Display: %s\n", WIN_StringToUTF8W(info->szDevice)); |
| #endif |
| |
| if (!WIN_GetDisplayMode(_this, info->szDevice, ENUM_CURRENT_SETTINGS, &mode, &orientation)) { |
| return; |
| } |
| |
| // Prevent adding duplicate displays. Do this after we know the display is |
| // ready to be added to allow any displays that we can't fully query to be |
| // removed |
| for (i = 0; i < _this->num_displays; ++i) { |
| SDL_DisplayData *driverdata = (SDL_DisplayData *)_this->displays[i].driverdata; |
| if (SDL_wcscmp(driverdata->DeviceName, info->szDevice) == 0) { |
| SDL_bool moved = (index != i); |
| |
| if (index >= _this->num_displays) { |
| return; |
| } |
| |
| if (moved) { |
| SDL_VideoDisplay tmp; |
| |
| SDL_memcpy(&tmp, &_this->displays[index], sizeof(tmp)); |
| SDL_memcpy(&_this->displays[index], &_this->displays[i], sizeof(tmp)); |
| SDL_memcpy(&_this->displays[i], &tmp, sizeof(tmp)); |
| i = index; |
| } |
| |
| driverdata->MonitorHandle = hMonitor; |
| driverdata->IsValid = SDL_TRUE; |
| |
| if (!_this->setting_display_mode) { |
| SDL_Rect bounds; |
| |
| SDL_ResetDisplayModes(i); |
| SDL_SetCurrentDisplayMode(&_this->displays[i], &mode); |
| SDL_SetDesktopDisplayMode(&_this->displays[i], &mode); |
| if (WIN_GetDisplayBounds(_this, &_this->displays[i], &bounds) == 0) { |
| if (SDL_memcmp(&driverdata->bounds, &bounds, sizeof(bounds)) != 0 || moved) { |
| SDL_SendDisplayEvent(&_this->displays[i], SDL_DISPLAYEVENT_MOVED, 0); |
| } |
| } |
| SDL_SendDisplayEvent(&_this->displays[i], SDL_DISPLAYEVENT_ORIENTATION, orientation); |
| } |
| goto done; |
| } |
| } |
| |
| displaydata = (SDL_DisplayData *)SDL_calloc(1, sizeof(*displaydata)); |
| if (!displaydata) { |
| return; |
| } |
| SDL_memcpy(displaydata->DeviceName, info->szDevice, sizeof(displaydata->DeviceName)); |
| displaydata->MonitorHandle = hMonitor; |
| displaydata->IsValid = SDL_TRUE; |
| |
| SDL_zero(display); |
| display.name = WIN_GetDisplayNameVista(info->szDevice); |
| if (!display.name) { |
| DISPLAY_DEVICEW device; |
| SDL_zero(device); |
| device.cb = sizeof(device); |
| if (EnumDisplayDevicesW(info->szDevice, 0, &device, 0)) { |
| display.name = WIN_StringToUTF8W(device.DeviceString); |
| } |
| } |
| |
| display.desktop_mode = mode; |
| display.current_mode = mode; |
| display.orientation = orientation; |
| display.device = _this; |
| display.driverdata = displaydata; |
| WIN_GetDisplayBounds(_this, &display, &displaydata->bounds); |
| index = SDL_AddVideoDisplay(&display, send_event); |
| SDL_assert(index == *display_index); |
| SDL_free(display.name); |
| |
| done: |
| *display_index += 1; |
| } |
| |
| typedef struct _WIN_AddDisplaysData |
| { |
| SDL_VideoDevice *video_device; |
| int display_index; |
| SDL_bool send_event; |
| SDL_bool want_primary; |
| } WIN_AddDisplaysData; |
| |
| static BOOL CALLBACK WIN_AddDisplaysCallback(HMONITOR hMonitor, |
| HDC hdcMonitor, |
| LPRECT lprcMonitor, |
| LPARAM dwData) |
| { |
| WIN_AddDisplaysData *data = (WIN_AddDisplaysData *)dwData; |
| MONITORINFOEXW info; |
| |
| SDL_zero(info); |
| info.cbSize = sizeof(info); |
| |
| if (GetMonitorInfoW(hMonitor, (LPMONITORINFO)&info) != 0) { |
| const SDL_bool is_primary = ((info.dwFlags & MONITORINFOF_PRIMARY) == MONITORINFOF_PRIMARY); |
| |
| if (is_primary == data->want_primary) { |
| WIN_AddDisplay(data->video_device, hMonitor, &info, &data->display_index, data->send_event); |
| } |
| } |
| |
| // continue enumeration |
| return TRUE; |
| } |
| |
| static void WIN_AddDisplays(_THIS, SDL_bool send_event) |
| { |
| WIN_AddDisplaysData callback_data; |
| callback_data.video_device = _this; |
| callback_data.display_index = 0; |
| callback_data.send_event = send_event; |
| |
| callback_data.want_primary = SDL_TRUE; |
| EnumDisplayMonitors(NULL, NULL, WIN_AddDisplaysCallback, (LPARAM)&callback_data); |
| |
| callback_data.want_primary = SDL_FALSE; |
| EnumDisplayMonitors(NULL, NULL, WIN_AddDisplaysCallback, (LPARAM)&callback_data); |
| } |
| |
| int WIN_InitModes(_THIS) |
| { |
| WIN_AddDisplays(_this, SDL_FALSE); |
| |
| if (_this->num_displays == 0) { |
| return SDL_SetError("No displays available"); |
| } |
| return 0; |
| } |
| |
| /** |
| * Convert the monitor rect and work rect from pixels to the SDL coordinate system (monitor origins are in pixels, |
| * monitor size in DPI-scaled points). |
| * |
| * No-op if DPI scaling is not enabled. |
| */ |
| static void WIN_MonitorInfoToSDL(const SDL_VideoData *videodata, HMONITOR monitor, MONITORINFO *info) |
| { |
| UINT xdpi, ydpi; |
| |
| if (!videodata->dpi_scaling_enabled) { |
| return; |
| } |
| |
| /* Check for Windows < 8.1*/ |
| if (!videodata->GetDpiForMonitor) { |
| return; |
| } |
| if (videodata->GetDpiForMonitor(monitor, MDT_EFFECTIVE_DPI, &xdpi, &ydpi) != S_OK) { |
| /* Shouldn't happen? */ |
| return; |
| } |
| |
| /* Convert monitor size to points, leaving the monitor position in pixels */ |
| info->rcMonitor.right = info->rcMonitor.left + MulDiv(info->rcMonitor.right - info->rcMonitor.left, 96, xdpi); |
| info->rcMonitor.bottom = info->rcMonitor.top + MulDiv(info->rcMonitor.bottom - info->rcMonitor.top, 96, ydpi); |
| |
| /* Convert monitor work rect to points */ |
| info->rcWork.left = info->rcMonitor.left + MulDiv(info->rcWork.left - info->rcMonitor.left, 96, xdpi); |
| info->rcWork.right = info->rcMonitor.left + MulDiv(info->rcWork.right - info->rcMonitor.left, 96, xdpi); |
| info->rcWork.top = info->rcMonitor.top + MulDiv(info->rcWork.top - info->rcMonitor.top, 96, ydpi); |
| info->rcWork.bottom = info->rcMonitor.top + MulDiv(info->rcWork.bottom - info->rcMonitor.top, 96, ydpi); |
| } |
| |
| int WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect) |
| { |
| const SDL_DisplayData *data = (const SDL_DisplayData *)display->driverdata; |
| const SDL_VideoData *videodata = (SDL_VideoData *)display->device->driverdata; |
| MONITORINFO minfo; |
| BOOL rc; |
| |
| SDL_zero(minfo); |
| minfo.cbSize = sizeof(MONITORINFO); |
| rc = GetMonitorInfo(data->MonitorHandle, &minfo); |
| |
| if (!rc) { |
| return SDL_SetError("Couldn't find monitor data"); |
| } |
| |
| WIN_MonitorInfoToSDL(videodata, data->MonitorHandle, &minfo); |
| rect->x = minfo.rcMonitor.left; |
| rect->y = minfo.rcMonitor.top; |
| rect->w = minfo.rcMonitor.right - minfo.rcMonitor.left; |
| rect->h = minfo.rcMonitor.bottom - minfo.rcMonitor.top; |
| |
| return 0; |
| } |
| |
| int WIN_GetDisplayDPI(_THIS, SDL_VideoDisplay *display, float *ddpi_out, float *hdpi_out, float *vdpi_out) |
| { |
| const SDL_DisplayData *displaydata = (SDL_DisplayData *)display->driverdata; |
| const SDL_VideoData *videodata = (SDL_VideoData *)display->device->driverdata; |
| float hdpi = 0, vdpi = 0, ddpi = 0; |
| |
| if (videodata->GetDpiForMonitor) { |
| UINT hdpi_uint, vdpi_uint; |
| // Windows 8.1+ codepath |
| if (videodata->GetDpiForMonitor(displaydata->MonitorHandle, MDT_EFFECTIVE_DPI, &hdpi_uint, &vdpi_uint) == S_OK) { |
| // GetDpiForMonitor docs promise to return the same hdpi/vdpi |
| hdpi = (float)hdpi_uint; |
| vdpi = (float)hdpi_uint; |
| ddpi = (float)hdpi_uint; |
| } else { |
| return SDL_SetError("GetDpiForMonitor failed"); |
| } |
| } else { |
| // Window 8.0 and below: same DPI for all monitors. |
| HDC hdc; |
| int hdpi_int, vdpi_int, hpoints, vpoints, hpix, vpix; |
| float hinches, vinches; |
| |
| hdc = GetDC(NULL); |
| if (!hdc) { |
| return SDL_SetError("GetDC failed"); |
| } |
| hdpi_int = GetDeviceCaps(hdc, LOGPIXELSX); |
| vdpi_int = GetDeviceCaps(hdc, LOGPIXELSY); |
| ReleaseDC(NULL, hdc); |
| |
| hpoints = GetSystemMetrics(SM_CXVIRTUALSCREEN); |
| vpoints = GetSystemMetrics(SM_CYVIRTUALSCREEN); |
| |
| hpix = MulDiv(hpoints, hdpi_int, 96); |
| vpix = MulDiv(vpoints, vdpi_int, 96); |
| |
| hinches = (float)hpoints / 96.0f; |
| vinches = (float)vpoints / 96.0f; |
| |
| hdpi = (float)hdpi_int; |
| vdpi = (float)vdpi_int; |
| ddpi = SDL_ComputeDiagonalDPI(hpix, vpix, hinches, vinches); |
| } |
| |
| if (ddpi_out) { |
| *ddpi_out = ddpi; |
| } |
| if (hdpi_out) { |
| *hdpi_out = hdpi; |
| } |
| if (vdpi_out) { |
| *vdpi_out = vdpi; |
| } |
| |
| return ddpi != 0.0f ? 0 : SDL_SetError("Couldn't get DPI"); |
| } |
| |
| int WIN_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect) |
| { |
| const SDL_DisplayData *data = (const SDL_DisplayData *)display->driverdata; |
| const SDL_VideoData *videodata = (SDL_VideoData *)display->device->driverdata; |
| MONITORINFO minfo; |
| BOOL rc; |
| |
| SDL_zero(minfo); |
| minfo.cbSize = sizeof(MONITORINFO); |
| rc = GetMonitorInfo(data->MonitorHandle, &minfo); |
| |
| if (!rc) { |
| return SDL_SetError("Couldn't find monitor data"); |
| } |
| |
| WIN_MonitorInfoToSDL(videodata, data->MonitorHandle, &minfo); |
| rect->x = minfo.rcWork.left; |
| rect->y = minfo.rcWork.top; |
| rect->w = minfo.rcWork.right - minfo.rcWork.left; |
| rect->h = minfo.rcWork.bottom - minfo.rcWork.top; |
| |
| return 0; |
| } |
| |
| /** |
| * Convert a point from the SDL coordinate system (monitor origins are in pixels, |
| * offset within a monitor in DPI-scaled points) to Windows virtual screen coordinates (pixels). |
| * |
| * No-op if DPI scaling is not enabled (returns 96 dpi). |
| * |
| * Returns the DPI of the monitor that was closest to x, y and used for the conversion. |
| */ |
| void WIN_ScreenPointFromSDL(int *x, int *y, int *dpiOut) |
| { |
| const SDL_VideoDevice *videodevice = SDL_GetVideoDevice(); |
| const SDL_VideoData *videodata; |
| int displayIndex; |
| SDL_Rect bounds; |
| float ddpi, hdpi, vdpi; |
| int x_sdl, y_sdl; |
| SDL_Point point; |
| point.x = *x; |
| point.y = *y; |
| |
| if (dpiOut) { |
| *dpiOut = 96; |
| } |
| |
| if (!videodevice || !videodevice->driverdata) { |
| return; |
| } |
| |
| videodata = (SDL_VideoData *)videodevice->driverdata; |
| if (!videodata->dpi_scaling_enabled) { |
| return; |
| } |
| |
| /* Can't use MonitorFromPoint for this because we currently have SDL coordinates, not pixels */ |
| displayIndex = SDL_GetPointDisplayIndex(&point); |
| |
| if (displayIndex < 0) { |
| return; |
| } |
| |
| if (SDL_GetDisplayBounds(displayIndex, &bounds) < 0 || SDL_GetDisplayDPI(displayIndex, &ddpi, &hdpi, &vdpi) < 0) { |
| return; |
| } |
| |
| if (dpiOut) { |
| *dpiOut = (int)ddpi; |
| } |
| |
| /* Undo the DPI-scaling within the monitor bounds to convert back to pixels */ |
| x_sdl = *x; |
| y_sdl = *y; |
| *x = bounds.x + MulDiv(x_sdl - bounds.x, (int)ddpi, 96); |
| *y = bounds.y + MulDiv(y_sdl - bounds.y, (int)ddpi, 96); |
| |
| #ifdef HIGHDPI_DEBUG_VERBOSE |
| SDL_Log("WIN_ScreenPointFromSDL: (%d, %d) points -> (%d x %d) pixels, using %d DPI monitor", |
| x_sdl, y_sdl, *x, *y, (int)ddpi); |
| #endif |
| } |
| |
| /** |
| * Convert a point from Windows virtual screen coordinates (pixels) to the SDL |
| * coordinate system (monitor origins are in pixels, offset within a monitor in DPI-scaled points). |
| * |
| * No-op if DPI scaling is not enabled. |
| */ |
| void WIN_ScreenPointToSDL(int *x, int *y) |
| { |
| const SDL_VideoDevice *videodevice = SDL_GetVideoDevice(); |
| const SDL_VideoData *videodata; |
| POINT point; |
| HMONITOR monitor; |
| int i, displayIndex; |
| SDL_Rect bounds; |
| float ddpi, hdpi, vdpi; |
| int x_pixels, y_pixels; |
| |
| if (!videodevice || !videodevice->driverdata) { |
| return; |
| } |
| |
| videodata = (SDL_VideoData *)videodevice->driverdata; |
| if (!videodata->dpi_scaling_enabled) { |
| return; |
| } |
| |
| point.x = *x; |
| point.y = *y; |
| monitor = MonitorFromPoint(point, MONITOR_DEFAULTTONEAREST); |
| |
| /* Search for the corresponding SDL monitor */ |
| displayIndex = -1; |
| for (i = 0; i < videodevice->num_displays; ++i) { |
| SDL_DisplayData *driverdata = (SDL_DisplayData *)videodevice->displays[i].driverdata; |
| if (driverdata->MonitorHandle == monitor) { |
| displayIndex = i; |
| } |
| } |
| if (displayIndex == -1) { |
| return; |
| } |
| |
| /* Get SDL display properties */ |
| if (SDL_GetDisplayBounds(displayIndex, &bounds) < 0 || SDL_GetDisplayDPI(displayIndex, &ddpi, &hdpi, &vdpi) < 0) { |
| return; |
| } |
| |
| /* Convert the point's offset within the monitor from pixels to DPI-scaled points */ |
| x_pixels = *x; |
| y_pixels = *y; |
| *x = bounds.x + MulDiv(x_pixels - bounds.x, 96, (int)ddpi); |
| *y = bounds.y + MulDiv(y_pixels - bounds.y, 96, (int)ddpi); |
| |
| #ifdef HIGHDPI_DEBUG_VERBOSE |
| SDL_Log("WIN_ScreenPointToSDL: (%d, %d) pixels -> (%d x %d) points, using %d DPI monitor", |
| x_pixels, y_pixels, *x, *y, (int)ddpi); |
| #endif |
| } |
| |
| void WIN_GetDisplayModes(_THIS, SDL_VideoDisplay *display) |
| { |
| SDL_DisplayData *data = (SDL_DisplayData *)display->driverdata; |
| DWORD i; |
| SDL_DisplayMode mode; |
| |
| for (i = 0;; ++i) { |
| if (!WIN_GetDisplayMode(_this, data->DeviceName, i, &mode, NULL)) { |
| break; |
| } |
| if (SDL_ISPIXELFORMAT_INDEXED(mode.format)) { |
| /* We don't support palettized modes now */ |
| SDL_free(mode.driverdata); |
| continue; |
| } |
| if (mode.format != SDL_PIXELFORMAT_UNKNOWN) { |
| if (!SDL_AddDisplayMode(display, &mode)) { |
| SDL_free(mode.driverdata); |
| } |
| } else { |
| SDL_free(mode.driverdata); |
| } |
| } |
| } |
| |
| #ifdef DEBUG_MODES |
| static void WIN_LogMonitor(_THIS, HMONITOR mon) |
| { |
| const SDL_VideoData *vid_data = (const SDL_VideoData *)_this->driverdata; |
| MONITORINFOEX minfo; |
| UINT xdpi = 0, ydpi = 0; |
| char *name_utf8; |
| |
| if (vid_data->GetDpiForMonitor) { |
| vid_data->GetDpiForMonitor(mon, MDT_EFFECTIVE_DPI, &xdpi, &ydpi); |
| } |
| |
| SDL_zero(minfo); |
| minfo.cbSize = sizeof(minfo); |
| GetMonitorInfo(mon, (LPMONITORINFO)&minfo); |
| |
| name_utf8 = WIN_StringToUTF8(minfo.szDevice); |
| |
| SDL_Log("WIN_LogMonitor: monitor \"%s\": dpi: %d windows screen coordinates: %d, %d, %dx%d", |
| name_utf8, |
| xdpi, |
| minfo.rcMonitor.left, |
| minfo.rcMonitor.top, |
| minfo.rcMonitor.right - minfo.rcMonitor.left, |
| minfo.rcMonitor.bottom - minfo.rcMonitor.top); |
| |
| SDL_free(name_utf8); |
| } |
| #endif |
| |
| int WIN_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode) |
| { |
| SDL_DisplayData *displaydata = (SDL_DisplayData *)display->driverdata; |
| SDL_DisplayModeData *data = (SDL_DisplayModeData *)mode->driverdata; |
| LONG status; |
| |
| #ifdef DEBUG_MODES |
| SDL_Log("WIN_SetDisplayMode: monitor state before mode change:"); |
| WIN_LogMonitor(_this, displaydata->MonitorHandle); |
| #endif |
| |
| /* High-DPI notes: |
| |
| - ChangeDisplaySettingsEx always takes pixels. |
| - e.g. if the display is set to 2880x1800 with 200% scaling in Display Settings |
| - calling ChangeDisplaySettingsEx with a dmPelsWidth/Height other than 2880x1800 will |
| change the monitor DPI to 96. (100% scaling) |
| - calling ChangeDisplaySettingsEx with a dmPelsWidth/Height of 2880x1800 (or a NULL DEVMODE*) will |
| reset the monitor DPI to 192. (200% scaling) |
| |
| NOTE: these are temporary changes in DPI, not modifications to the Control Panel setting. */ |
| if (mode->driverdata == display->desktop_mode.driverdata) { |
| #ifdef DEBUG_MODES |
| SDL_Log("WIN_SetDisplayMode: resetting to original resolution"); |
| #endif |
| status = ChangeDisplaySettingsExW(displaydata->DeviceName, NULL, NULL, CDS_FULLSCREEN, NULL); |
| } else { |
| #ifdef DEBUG_MODES |
| SDL_Log("WIN_SetDisplayMode: changing to %dx%d pixels", data->DeviceMode.dmPelsWidth, data->DeviceMode.dmPelsHeight); |
| #endif |
| status = ChangeDisplaySettingsExW(displaydata->DeviceName, &data->DeviceMode, NULL, CDS_FULLSCREEN, NULL); |
| } |
| if (status != DISP_CHANGE_SUCCESSFUL) { |
| const char *reason = "Unknown reason"; |
| switch (status) { |
| case DISP_CHANGE_BADFLAGS: |
| reason = "DISP_CHANGE_BADFLAGS"; |
| break; |
| case DISP_CHANGE_BADMODE: |
| reason = "DISP_CHANGE_BADMODE"; |
| break; |
| case DISP_CHANGE_BADPARAM: |
| reason = "DISP_CHANGE_BADPARAM"; |
| break; |
| case DISP_CHANGE_FAILED: |
| reason = "DISP_CHANGE_FAILED"; |
| break; |
| } |
| return SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason); |
| } |
| |
| #ifdef DEBUG_MODES |
| SDL_Log("WIN_SetDisplayMode: monitor state after mode change:"); |
| WIN_LogMonitor(_this, displaydata->MonitorHandle); |
| #endif |
| |
| EnumDisplaySettingsW(displaydata->DeviceName, ENUM_CURRENT_SETTINGS, &data->DeviceMode); |
| WIN_UpdateDisplayMode(_this, displaydata->DeviceName, ENUM_CURRENT_SETTINGS, mode); |
| return 0; |
| } |
| |
| void WIN_RefreshDisplays(_THIS) |
| { |
| int i; |
| |
| // Mark all displays as potentially invalid to detect |
| // entries that have actually been removed |
| for (i = 0; i < _this->num_displays; ++i) { |
| SDL_DisplayData *driverdata = (SDL_DisplayData *)_this->displays[i].driverdata; |
| driverdata->IsValid = SDL_FALSE; |
| } |
| |
| // Enumerate displays to add any new ones and mark still |
| // connected entries as valid |
| WIN_AddDisplays(_this, SDL_TRUE); |
| |
| // Delete any entries still marked as invalid, iterate |
| // in reverse as each delete takes effect immediately |
| for (i = _this->num_displays - 1; i >= 0; --i) { |
| SDL_DisplayData *driverdata = (SDL_DisplayData *)_this->displays[i].driverdata; |
| if (driverdata->IsValid == SDL_FALSE) { |
| SDL_DelVideoDisplay(i); |
| } |
| } |
| } |
| |
| void WIN_QuitModes(_THIS) |
| { |
| /* All fullscreen windows should have restored modes by now */ |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_WINDOWS */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
