| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2019 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 SDL_VIDEO_DRIVER_WINDOWS |
| |
| #include "SDL_windowsvideo.h" |
| #include "../../../include/SDL_assert.h" |
| #include "../../../include/SDL_log.h" |
| |
| /* Windows CE compatibility */ |
| #ifndef CDS_FULLSCREEN |
| #define CDS_FULLSCREEN 0 |
| #endif |
| |
| /* #define DEBUG_MODES */ |
| |
| static void |
| WIN_UpdateDisplayMode(_THIS, LPCTSTR 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); |
| |
| 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 ); |
| |
| mode->w = logical_width; |
| mode->h = logical_height; |
| |
| SDL_zero(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_bool |
| WIN_GetDisplayMode(_THIS, LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode) |
| { |
| SDL_DisplayModeData *data; |
| DEVMODE devmode; |
| |
| devmode.dmSize = sizeof(devmode); |
| devmode.dmDriverExtra = 0; |
| if (!EnumDisplaySettings(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); |
| return SDL_TRUE; |
| } |
| |
| static SDL_bool |
| WIN_AddDisplay(_THIS, HMONITOR hMonitor, const MONITORINFOEX *info) |
| { |
| SDL_VideoDisplay display; |
| SDL_DisplayData *displaydata; |
| SDL_DisplayMode mode; |
| DISPLAY_DEVICE device; |
| |
| #ifdef DEBUG_MODES |
| SDL_Log("Display: %s\n", WIN_StringToUTF8(info->szDevice)); |
| #endif |
| |
| if (!WIN_GetDisplayMode(_this, info->szDevice, ENUM_CURRENT_SETTINGS, &mode)) { |
| return SDL_FALSE; |
| } |
| |
| displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata)); |
| if (!displaydata) { |
| return SDL_FALSE; |
| } |
| SDL_memcpy(displaydata->DeviceName, info->szDevice, |
| sizeof(displaydata->DeviceName)); |
| displaydata->MonitorHandle = hMonitor; |
| |
| SDL_zero(display); |
| device.cb = sizeof(device); |
| if (EnumDisplayDevices(info->szDevice, 0, &device, 0)) { |
| display.name = WIN_StringToUTF8(device.DeviceString); |
| } |
| display.desktop_mode = mode; |
| display.current_mode = mode; |
| display.driverdata = displaydata; |
| SDL_AddVideoDisplay(&display); |
| SDL_free(display.name); |
| return SDL_TRUE; |
| } |
| |
| typedef struct _WIN_AddDisplaysData { |
| SDL_VideoDevice *video_device; |
| 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; |
| MONITORINFOEX info; |
| |
| SDL_zero(info); |
| info.cbSize = sizeof(info); |
| |
| if (GetMonitorInfo(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); |
| } |
| } |
| |
| // continue enumeration |
| return TRUE; |
| } |
| |
| static void |
| WIN_AddDisplays(_THIS) |
| { |
| WIN_AddDisplaysData callback_data; |
| callback_data.video_device = _this; |
| |
| 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); |
| |
| if (_this->num_displays == 0) { |
| return SDL_SetError("No displays available"); |
| } |
| return 0; |
| } |
| |
| int |
| WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect) |
| { |
| const SDL_DisplayData *data = (const SDL_DisplayData *)display->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"); |
| } |
| |
| 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 == NULL) { |
| 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; |
| 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"); |
| } |
| |
| 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; |
| } |
| |
| 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)) { |
| 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); |
| } |
| } |
| } |
| |
| 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; |
| |
| if (mode->driverdata == display->desktop_mode.driverdata) { |
| status = ChangeDisplaySettingsEx(displaydata->DeviceName, NULL, NULL, CDS_FULLSCREEN, NULL); |
| } else { |
| status = ChangeDisplaySettingsEx(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); |
| } |
| EnumDisplaySettings(displaydata->DeviceName, ENUM_CURRENT_SETTINGS, &data->DeviceMode); |
| WIN_UpdateDisplayMode(_this, displaydata->DeviceName, ENUM_CURRENT_SETTINGS, mode); |
| return 0; |
| } |
| |
| 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: */ |
