ref: 8f1bc269f071e2e5eb607ecb26133656fc850527
dir: /external/SDL2/src/video/windows/SDL_windowsmodes.c/
/* 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: */