ref: a8d0595bcd1da3e2faad92e378d8366b5a93ae5e
dir: /external/glfw/src/win32_monitor.c/
//======================================================================== // GLFW 3.3 Win32 - www.glfw.org //------------------------------------------------------------------------ // Copyright (c) 2002-2006 Marcus Geelnard // Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.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. // //======================================================================== // Please use C89 style variable declarations in this file because VS 2010 //======================================================================== #include "internal.h" #include <stdlib.h> #include <string.h> #include <limits.h> #include <malloc.h> #include <wchar.h> // Callback for EnumDisplayMonitors in createMonitor // static BOOL CALLBACK monitorCallback(HMONITOR handle, HDC dc, RECT* rect, LPARAM data) { MONITORINFOEXW mi; ZeroMemory(&mi, sizeof(mi)); mi.cbSize = sizeof(mi); if (GetMonitorInfoW(handle, (MONITORINFO*) &mi)) { _GLFWmonitor* monitor = (_GLFWmonitor*) data; if (wcscmp(mi.szDevice, monitor->win32.adapterName) == 0) monitor->win32.handle = handle; } return TRUE; } // Create monitor from an adapter and (optionally) a display // static _GLFWmonitor* createMonitor(DISPLAY_DEVICEW* adapter, DISPLAY_DEVICEW* display) { _GLFWmonitor* monitor; int widthMM, heightMM; char* name; HDC dc; DEVMODEW dm; RECT rect; if (display) name = _glfwCreateUTF8FromWideStringWin32(display->DeviceString); else name = _glfwCreateUTF8FromWideStringWin32(adapter->DeviceString); if (!name) return NULL; ZeroMemory(&dm, sizeof(dm)); dm.dmSize = sizeof(dm); EnumDisplaySettingsW(adapter->DeviceName, ENUM_CURRENT_SETTINGS, &dm); dc = CreateDCW(L"DISPLAY", adapter->DeviceName, NULL, NULL); if (IsWindows8Point1OrGreater()) { widthMM = GetDeviceCaps(dc, HORZSIZE); heightMM = GetDeviceCaps(dc, VERTSIZE); } else { widthMM = (int) (dm.dmPelsWidth * 25.4f / GetDeviceCaps(dc, LOGPIXELSX)); heightMM = (int) (dm.dmPelsHeight * 25.4f / GetDeviceCaps(dc, LOGPIXELSY)); } DeleteDC(dc); monitor = _glfwAllocMonitor(name, widthMM, heightMM); free(name); if (adapter->StateFlags & DISPLAY_DEVICE_MODESPRUNED) monitor->win32.modesPruned = GLFW_TRUE; wcscpy(monitor->win32.adapterName, adapter->DeviceName); WideCharToMultiByte(CP_UTF8, 0, adapter->DeviceName, -1, monitor->win32.publicAdapterName, sizeof(monitor->win32.publicAdapterName), NULL, NULL); if (display) { wcscpy(monitor->win32.displayName, display->DeviceName); WideCharToMultiByte(CP_UTF8, 0, display->DeviceName, -1, monitor->win32.publicDisplayName, sizeof(monitor->win32.publicDisplayName), NULL, NULL); } rect.left = dm.dmPosition.x; rect.top = dm.dmPosition.y; rect.right = dm.dmPosition.x + dm.dmPelsWidth; rect.bottom = dm.dmPosition.y + dm.dmPelsHeight; EnumDisplayMonitors(NULL, &rect, monitorCallback, (LPARAM) monitor); return monitor; } ////////////////////////////////////////////////////////////////////////// ////// GLFW internal API ////// ////////////////////////////////////////////////////////////////////////// // Poll for changes in the set of connected monitors // void _glfwPollMonitorsWin32(void) { int i, disconnectedCount; _GLFWmonitor** disconnected = NULL; DWORD adapterIndex, displayIndex; DISPLAY_DEVICEW adapter, display; _GLFWmonitor* monitor; disconnectedCount = _glfw.monitorCount; if (disconnectedCount) { disconnected = calloc(_glfw.monitorCount, sizeof(_GLFWmonitor*)); memcpy(disconnected, _glfw.monitors, _glfw.monitorCount * sizeof(_GLFWmonitor*)); } for (adapterIndex = 0; ; adapterIndex++) { int type = _GLFW_INSERT_LAST; ZeroMemory(&adapter, sizeof(adapter)); adapter.cb = sizeof(adapter); if (!EnumDisplayDevicesW(NULL, adapterIndex, &adapter, 0)) break; if (!(adapter.StateFlags & DISPLAY_DEVICE_ACTIVE)) continue; if (adapter.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) type = _GLFW_INSERT_FIRST; for (displayIndex = 0; ; displayIndex++) { ZeroMemory(&display, sizeof(display)); display.cb = sizeof(display); if (!EnumDisplayDevicesW(adapter.DeviceName, displayIndex, &display, 0)) break; if (!(display.StateFlags & DISPLAY_DEVICE_ACTIVE)) continue; for (i = 0; i < disconnectedCount; i++) { if (disconnected[i] && wcscmp(disconnected[i]->win32.displayName, display.DeviceName) == 0) { disconnected[i] = NULL; break; } } if (i < disconnectedCount) continue; monitor = createMonitor(&adapter, &display); if (!monitor) { free(disconnected); return; } _glfwInputMonitor(monitor, GLFW_CONNECTED, type); type = _GLFW_INSERT_LAST; } // HACK: If an active adapter does not have any display devices // (as sometimes happens), add it directly as a monitor if (displayIndex == 0) { for (i = 0; i < disconnectedCount; i++) { if (disconnected[i] && wcscmp(disconnected[i]->win32.adapterName, adapter.DeviceName) == 0) { disconnected[i] = NULL; break; } } if (i < disconnectedCount) continue; monitor = createMonitor(&adapter, NULL); if (!monitor) { free(disconnected); return; } _glfwInputMonitor(monitor, GLFW_CONNECTED, type); } } for (i = 0; i < disconnectedCount; i++) { if (disconnected[i]) _glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0); } free(disconnected); } // Change the current video mode // void _glfwSetVideoModeWin32(_GLFWmonitor* monitor, const GLFWvidmode* desired) { GLFWvidmode current; const GLFWvidmode* best; DEVMODEW dm; LONG result; best = _glfwChooseVideoMode(monitor, desired); _glfwPlatformGetVideoMode(monitor, ¤t); if (_glfwCompareVideoModes(¤t, best) == 0) return; ZeroMemory(&dm, sizeof(dm)); dm.dmSize = sizeof(dm); dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY; dm.dmPelsWidth = best->width; dm.dmPelsHeight = best->height; dm.dmBitsPerPel = best->redBits + best->greenBits + best->blueBits; dm.dmDisplayFrequency = best->refreshRate; if (dm.dmBitsPerPel < 15 || dm.dmBitsPerPel >= 24) dm.dmBitsPerPel = 32; result = ChangeDisplaySettingsExW(monitor->win32.adapterName, &dm, NULL, CDS_FULLSCREEN, NULL); if (result == DISP_CHANGE_SUCCESSFUL) monitor->win32.modeChanged = GLFW_TRUE; else { const char* description = "Unknown error"; if (result == DISP_CHANGE_BADDUALVIEW) description = "The system uses DualView"; else if (result == DISP_CHANGE_BADFLAGS) description = "Invalid flags"; else if (result == DISP_CHANGE_BADMODE) description = "Graphics mode not supported"; else if (result == DISP_CHANGE_BADPARAM) description = "Invalid parameter"; else if (result == DISP_CHANGE_FAILED) description = "Graphics mode failed"; else if (result == DISP_CHANGE_NOTUPDATED) description = "Failed to write to registry"; else if (result == DISP_CHANGE_RESTART) description = "Computer restart required"; _glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Failed to set video mode: %s", description); } } // Restore the previously saved (original) video mode // void _glfwRestoreVideoModeWin32(_GLFWmonitor* monitor) { if (monitor->win32.modeChanged) { ChangeDisplaySettingsExW(monitor->win32.adapterName, NULL, NULL, CDS_FULLSCREEN, NULL); monitor->win32.modeChanged = GLFW_FALSE; } } void _glfwGetMonitorContentScaleWin32(HMONITOR handle, float* xscale, float* yscale) { UINT xdpi, ydpi; if (IsWindows8Point1OrGreater()) GetDpiForMonitor(handle, MDT_EFFECTIVE_DPI, &xdpi, &ydpi); else { const HDC dc = GetDC(NULL); xdpi = GetDeviceCaps(dc, LOGPIXELSX); ydpi = GetDeviceCaps(dc, LOGPIXELSY); ReleaseDC(NULL, dc); } if (xscale) *xscale = xdpi / (float) USER_DEFAULT_SCREEN_DPI; if (yscale) *yscale = ydpi / (float) USER_DEFAULT_SCREEN_DPI; } ////////////////////////////////////////////////////////////////////////// ////// GLFW platform API ////// ////////////////////////////////////////////////////////////////////////// void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor) { } void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos) { DEVMODEW dm; ZeroMemory(&dm, sizeof(dm)); dm.dmSize = sizeof(dm); EnumDisplaySettingsExW(monitor->win32.adapterName, ENUM_CURRENT_SETTINGS, &dm, EDS_ROTATEDMODE); if (xpos) *xpos = dm.dmPosition.x; if (ypos) *ypos = dm.dmPosition.y; } void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor, float* xscale, float* yscale) { _glfwGetMonitorContentScaleWin32(monitor->win32.handle, xscale, yscale); } void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int* width, int* height) { MONITORINFO mi = { sizeof(mi) }; GetMonitorInfo(monitor->win32.handle, &mi); if (xpos) *xpos = mi.rcWork.left; if (ypos) *ypos = mi.rcWork.top; if (width) *width = mi.rcWork.right - mi.rcWork.left; if (height) *height = mi.rcWork.bottom - mi.rcWork.top; } GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count) { int modeIndex = 0, size = 0; GLFWvidmode* result = NULL; *count = 0; for (;;) { int i; GLFWvidmode mode; DEVMODEW dm; ZeroMemory(&dm, sizeof(dm)); dm.dmSize = sizeof(dm); if (!EnumDisplaySettingsW(monitor->win32.adapterName, modeIndex, &dm)) break; modeIndex++; // Skip modes with less than 15 BPP if (dm.dmBitsPerPel < 15) continue; mode.width = dm.dmPelsWidth; mode.height = dm.dmPelsHeight; mode.refreshRate = dm.dmDisplayFrequency; _glfwSplitBPP(dm.dmBitsPerPel, &mode.redBits, &mode.greenBits, &mode.blueBits); for (i = 0; i < *count; i++) { if (_glfwCompareVideoModes(result + i, &mode) == 0) break; } // Skip duplicate modes if (i < *count) continue; if (monitor->win32.modesPruned) { // Skip modes not supported by the connected displays if (ChangeDisplaySettingsExW(monitor->win32.adapterName, &dm, NULL, CDS_TEST, NULL) != DISP_CHANGE_SUCCESSFUL) { continue; } } if (*count == size) { size += 128; result = (GLFWvidmode*) realloc(result, size * sizeof(GLFWvidmode)); } (*count)++; result[*count - 1] = mode; } if (!*count) { // HACK: Report the current mode if no valid modes were found result = calloc(1, sizeof(GLFWvidmode)); _glfwPlatformGetVideoMode(monitor, result); *count = 1; } return result; } void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode) { DEVMODEW dm; ZeroMemory(&dm, sizeof(dm)); dm.dmSize = sizeof(dm); EnumDisplaySettingsW(monitor->win32.adapterName, ENUM_CURRENT_SETTINGS, &dm); mode->width = dm.dmPelsWidth; mode->height = dm.dmPelsHeight; mode->refreshRate = dm.dmDisplayFrequency; _glfwSplitBPP(dm.dmBitsPerPel, &mode->redBits, &mode->greenBits, &mode->blueBits); } GLFWbool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp) { HDC dc; WORD values[3][256]; dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL); GetDeviceGammaRamp(dc, values); DeleteDC(dc); _glfwAllocGammaArrays(ramp, 256); memcpy(ramp->red, values[0], sizeof(values[0])); memcpy(ramp->green, values[1], sizeof(values[1])); memcpy(ramp->blue, values[2], sizeof(values[2])); return GLFW_TRUE; } void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp) { HDC dc; WORD values[3][256]; if (ramp->size != 256) { _glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Gamma ramp size must be 256"); return; } memcpy(values[0], ramp->red, sizeof(values[0])); memcpy(values[1], ramp->green, sizeof(values[1])); memcpy(values[2], ramp->blue, sizeof(values[2])); dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL); SetDeviceGammaRamp(dc, values); DeleteDC(dc); } ////////////////////////////////////////////////////////////////////////// ////// GLFW native API ////// ////////////////////////////////////////////////////////////////////////// GLFWAPI const char* glfwGetWin32Adapter(GLFWmonitor* handle) { _GLFWmonitor* monitor = (_GLFWmonitor*) handle; _GLFW_REQUIRE_INIT_OR_RETURN(NULL); return monitor->win32.publicAdapterName; } GLFWAPI const char* glfwGetWin32Monitor(GLFWmonitor* handle) { _GLFWmonitor* monitor = (_GLFWmonitor*) handle; _GLFW_REQUIRE_INIT_OR_RETURN(NULL); return monitor->win32.publicDisplayName; }