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glfw/src/win32_monitor.c

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//========================================================================
// GLFW 3.4 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"
#if defined(_GLFW_WIN32)
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <wchar.h>
#if WINVER < 0x0601 // To be able to compile on windows Vista and XP even though the feature won't be used.
typedef struct DISPLAYCONFIG_PATH_SOURCE_INFO
{
LUID adapterId;
UINT32 id;
union
{
UINT32 modeInfoIdx;
struct
{
UINT32 cloneGroupId : 16;
UINT32 sourceModeInfoIdx : 16;
} DUMMYSTRUCTNAME;
} DUMMYUNIONNAME;
UINT32 statusFlags;
} DISPLAYCONFIG_PATH_SOURCE_INFO;
typedef enum
{
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER = -1,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HD15 = 0,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SVIDEO = 1,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPOSITE_VIDEO = 2,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPONENT_VIDEO = 3,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DVI = 4,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HDMI = 5,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_LVDS = 6,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_D_JPN = 8,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDI = 9,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EXTERNAL = 10,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED = 11,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EXTERNAL = 12,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED = 13,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDTVDONGLE = 14,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_MIRACAST = 15,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INDIRECT_WIRED = 16,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INDIRECT_VIRTUAL = 17,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_USB_TUNNEL,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL = (int)0x80000000, // Cast required to enforce 4 byte enum.
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_FORCE_UINT32 = (int)0xFFFFFFFF // Cast required to enforce 4 byte enum.
} DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY;
typedef enum
{
DISPLAYCONFIG_ROTATION_IDENTITY = 1,
DISPLAYCONFIG_ROTATION_ROTATE90 = 2,
DISPLAYCONFIG_ROTATION_ROTATE180 = 3,
DISPLAYCONFIG_ROTATION_ROTATE270 = 4,
DISPLAYCONFIG_ROTATION_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_ROTATION;
typedef enum
{
DISPLAYCONFIG_SCALING_IDENTITY = 1,
DISPLAYCONFIG_SCALING_CENTERED = 2,
DISPLAYCONFIG_SCALING_STRETCHED = 3,
DISPLAYCONFIG_SCALING_ASPECTRATIOCENTEREDMAX = 4,
DISPLAYCONFIG_SCALING_CUSTOM = 5,
DISPLAYCONFIG_SCALING_PREFERRED = 128,
DISPLAYCONFIG_SCALING_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_SCALING;
typedef struct DISPLAYCONFIG_RATIONAL
{
UINT32 Numerator;
UINT32 Denominator;
} DISPLAYCONFIG_RATIONAL;
typedef enum
{
DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED = 0,
DISPLAYCONFIG_SCANLINE_ORDERING_PROGRESSIVE = 1,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED = 2,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_UPPERFIELDFIRST,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_LOWERFIELDFIRST = 3,
DISPLAYCONFIG_SCANLINE_ORDERING_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_SCANLINE_ORDERING;
typedef struct DISPLAYCONFIG_PATH_TARGET_INFO
{
LUID adapterId;
UINT32 id;
union
{
UINT32 modeInfoIdx;
struct
{
UINT32 desktopModeInfoIdx : 16;
UINT32 targetModeInfoIdx : 16;
} DUMMYSTRUCTNAME;
} DUMMYUNIONNAME;
DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
DISPLAYCONFIG_ROTATION rotation;
DISPLAYCONFIG_SCALING scaling;
DISPLAYCONFIG_RATIONAL refreshRate;
DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
BOOL targetAvailable;
UINT32 statusFlags;
} DISPLAYCONFIG_PATH_TARGET_INFO;
typedef struct DISPLAYCONFIG_PATH_INFO
{
DISPLAYCONFIG_PATH_SOURCE_INFO sourceInfo;
DISPLAYCONFIG_PATH_TARGET_INFO targetInfo;
UINT32 flags;
} DISPLAYCONFIG_PATH_INFO;
typedef enum
{
DISPLAYCONFIG_MODE_INFO_TYPE_SOURCE = 1,
DISPLAYCONFIG_MODE_INFO_TYPE_TARGET = 2,
DISPLAYCONFIG_MODE_INFO_TYPE_DESKTOP_IMAGE = 3,
DISPLAYCONFIG_MODE_INFO_TYPE_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_MODE_INFO_TYPE;
typedef struct DISPLAYCONFIG_2DREGION
{
UINT32 cx;
UINT32 cy;
} DISPLAYCONFIG_2DREGION;
typedef struct DISPLAYCONFIG_VIDEO_SIGNAL_INFO
{
UINT64 pixelRate;
DISPLAYCONFIG_RATIONAL hSyncFreq;
DISPLAYCONFIG_RATIONAL vSyncFreq;
DISPLAYCONFIG_2DREGION activeSize;
DISPLAYCONFIG_2DREGION totalSize;
union
{
struct
{
UINT32 videoStandard : 16;
UINT32 vSyncFreqDivider : 6;
UINT32 reserved : 10;
} AdditionalSignalInfo;
UINT32 videoStandard;
} DUMMYUNIONNAME;
DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
} DISPLAYCONFIG_VIDEO_SIGNAL_INFO;
typedef struct DISPLAYCONFIG_TARGET_MODE
{
DISPLAYCONFIG_VIDEO_SIGNAL_INFO targetVideoSignalInfo;
} DISPLAYCONFIG_TARGET_MODE;
typedef enum
{
DISPLAYCONFIG_PIXELFORMAT_8BPP = 1,
DISPLAYCONFIG_PIXELFORMAT_16BPP = 2,
DISPLAYCONFIG_PIXELFORMAT_24BPP = 3,
DISPLAYCONFIG_PIXELFORMAT_32BPP = 4,
DISPLAYCONFIG_PIXELFORMAT_NONGDI = 5,
DISPLAYCONFIG_PIXELFORMAT_FORCE_UINT32 = 0xffffffff
} DISPLAYCONFIG_PIXELFORMAT;
typedef struct DISPLAYCONFIG_SOURCE_MODE
{
UINT32 width;
UINT32 height;
DISPLAYCONFIG_PIXELFORMAT pixelFormat;
POINTL position;
} DISPLAYCONFIG_SOURCE_MODE;
typedef struct DISPLAYCONFIG_DESKTOP_IMAGE_INFO
{
POINTL PathSourceSize;
RECTL DesktopImageRegion;
RECTL DesktopImageClip;
} DISPLAYCONFIG_DESKTOP_IMAGE_INFO;
typedef struct DISPLAYCONFIG_MODE_INFO
{
DISPLAYCONFIG_MODE_INFO_TYPE infoType;
UINT32 id;
LUID adapterId;
union
{
DISPLAYCONFIG_TARGET_MODE targetMode;
DISPLAYCONFIG_SOURCE_MODE sourceMode;
DISPLAYCONFIG_DESKTOP_IMAGE_INFO desktopImageInfo;
} DUMMYUNIONNAME;
} DISPLAYCONFIG_MODE_INFO;
const UINT32 QDC_ONLY_ACTIVE_PATHS = 0x00000002;
typedef enum
{
DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME = 1,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME = 2,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE = 3,
DISPLAYCONFIG_DEVICE_INFO_GET_ADAPTER_NAME = 4,
DISPLAYCONFIG_DEVICE_INFO_SET_TARGET_PERSISTENCE = 5,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE = 6,
DISPLAYCONFIG_DEVICE_INFO_GET_SUPPORT_VIRTUAL_RESOLUTION = 7,
DISPLAYCONFIG_DEVICE_INFO_SET_SUPPORT_VIRTUAL_RESOLUTION = 8,
DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO = 9,
DISPLAYCONFIG_DEVICE_INFO_SET_ADVANCED_COLOR_STATE = 10,
DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL = 11,
DISPLAYCONFIG_DEVICE_INFO_GET_MONITOR_SPECIALIZATION,
DISPLAYCONFIG_DEVICE_INFO_SET_MONITOR_SPECIALIZATION,
DISPLAYCONFIG_DEVICE_INFO_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_DEVICE_INFO_TYPE;
typedef struct DISPLAYCONFIG_DEVICE_INFO_HEADER {
DISPLAYCONFIG_DEVICE_INFO_TYPE type;
UINT32 size;
LUID adapterId;
UINT32 id;
} DISPLAYCONFIG_DEVICE_INFO_HEADER;
typedef struct DISPLAYCONFIG_SOURCE_DEVICE_NAME
{
DISPLAYCONFIG_DEVICE_INFO_HEADER header;
WCHAR viewGdiDeviceName[CCHDEVICENAME];
} DISPLAYCONFIG_SOURCE_DEVICE_NAME;
typedef struct DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS
{
union
{
struct
{
UINT32 friendlyNameFromEdid : 1;
UINT32 friendlyNameForced : 1;
UINT32 edidIdsValid : 1;
UINT32 reserved : 29;
} DUMMYSTRUCTNAME;
UINT32 value;
} DUMMYUNIONNAME;
} DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS;
typedef struct DISPLAYCONFIG_TARGET_DEVICE_NAME
{
DISPLAYCONFIG_DEVICE_INFO_HEADER header;
DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS flags;
DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
UINT16 edidManufactureId;
UINT16 edidProductCodeId;
UINT32 connectorInstance;
WCHAR monitorFriendlyDeviceName[64];
WCHAR monitorDevicePath[128];
} DISPLAYCONFIG_TARGET_DEVICE_NAME;
typedef enum DISPLAYCONFIG_TOPOLOGY_ID
{
DISPLAYCONFIG_TOPOLOGY_INTERNAL = 0x00000001,
DISPLAYCONFIG_TOPOLOGY_CLONE = 0x00000002,
DISPLAYCONFIG_TOPOLOGY_EXTEND = 0x00000004,
DISPLAYCONFIG_TOPOLOGY_EXTERNAL = 0x00000008,
DISPLAYCONFIG_TOPOLOGY_FORCE_UINT32 = 0xFFFFFFFF
} DISPLAYCONFIG_TOPOLOGY_ID;
#endif //#if WINVER < 0x0601
typedef LONG (*pGetDisplayConfigBufferSizes)(UINT32 flags, UINT32 *numPathArrayElements, UINT32 *numModeInfoArrayElements);
typedef LONG (*pQueryDisplayConfig)(UINT32 flags, UINT32 *numPathArrayElements, DISPLAYCONFIG_PATH_INFO *pathArray, UINT32 *numModeInfoArrayElements, DISPLAYCONFIG_MODE_INFO *modeInfoArray, DISPLAYCONFIG_TOPOLOGY_ID *currentTopologyId);
typedef LONG (*pDisplayConfigGetDeviceInfo)(DISPLAYCONFIG_DEVICE_INFO_HEADER* requestPacket);
typedef struct AccurateMonitorNameRequiredData
{
HMODULE m_dll;
pGetDisplayConfigBufferSizes m_GetDisplayConfigBufferSizes;
pQueryDisplayConfig m_QueryDisplayConfig;
pDisplayConfigGetDeviceInfo m_DisplayConfigGetDeviceInfo;
} AccurateMonitorNameRequiredData;
BOOL loadWin7MonitorPointers(AccurateMonitorNameRequiredData *io_ptrs)
{
if(!IsWindows7OrGreater())
return 0;
io_ptrs->m_dll = LoadLibrary(L"User32.dll");
if (io_ptrs == NULL)
return 0;
io_ptrs->m_GetDisplayConfigBufferSizes = (pGetDisplayConfigBufferSizes)GetProcAddress(io_ptrs->m_dll, "GetDisplayConfigBufferSizes");
if(io_ptrs->m_GetDisplayConfigBufferSizes == NULL)
return 0;
io_ptrs->m_QueryDisplayConfig = (pQueryDisplayConfig)GetProcAddress(io_ptrs->m_dll, "QueryDisplayConfig");
if(io_ptrs->m_QueryDisplayConfig == NULL)
return 0;
io_ptrs->m_DisplayConfigGetDeviceInfo = (pDisplayConfigGetDeviceInfo)GetProcAddress(io_ptrs->m_dll, "DisplayConfigGetDeviceInfo");
if(io_ptrs->m_DisplayConfigGetDeviceInfo == NULL)
return 0;
return 1;
}
// If the returned pointer is valid (not NULL) the caller of this function is in charge of freeing the memory when he is done.
static char * GetAccurateMonitorName(const WCHAR *deviceName)
{
AccurateMonitorNameRequiredData dllPointers;
if(loadWin7MonitorPointers(&dllPointers) == 0)
return NULL;
DISPLAYCONFIG_PATH_INFO *paths;
paths = NULL;
DISPLAYCONFIG_MODE_INFO *modes;
modes = NULL;
char *retval;
retval = NULL;
UINT32 pathCount;
pathCount = 0;
UINT32 modeCount;
modeCount = 0;
UINT32 i;
LONG rc;
do {
rc = dllPointers.m_GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &pathCount, &modeCount);
if (rc != ERROR_SUCCESS) {
goto GET_ACCURATE_MONITOR_NAME_FAILURE;
}
free(paths);
free(modes);
paths = (DISPLAYCONFIG_PATH_INFO *) malloc(sizeof (DISPLAYCONFIG_PATH_INFO) * pathCount);
modes = (DISPLAYCONFIG_MODE_INFO *) malloc(sizeof (DISPLAYCONFIG_MODE_INFO) * modeCount);
if ((paths == NULL) || (modes == NULL)) {
goto GET_ACCURATE_MONITOR_NAME_FAILURE;
}
rc = dllPointers.m_QueryDisplayConfig(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;
ZeroMemory(&sourceName, sizeof(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 = dllPointers.m_DisplayConfigGetDeviceInfo(&sourceName.header);
if (rc != ERROR_SUCCESS) {
break;
} else if (wcscmp(deviceName, sourceName.viewGdiDeviceName) != 0) {
continue;
}
ZeroMemory(&targetName, sizeof(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 = dllPointers.m_DisplayConfigGetDeviceInfo(&targetName.header);
if (rc == ERROR_SUCCESS) {
retval = _glfwCreateUTF8FromWideStringWin32(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')) {
free(retval);
retval = NULL;
}
}
break;
}
}
FreeLibrary(dllPointers.m_dll);
free(paths);
free(modes);
return retval;
GET_ACCURATE_MONITOR_NAME_FAILURE:
FreeLibrary(dllPointers.m_dll);
free(retval);
free(paths);
free(modes);
return NULL;
}
// 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;
char *possiblyMoreAccurateMonitorName;
possiblyMoreAccurateMonitorName = GetAccurateMonitorName(mi.szDevice);
if(possiblyMoreAccurateMonitorName != NULL)
{
strncpy(monitor->name, possiblyMoreAccurateMonitorName, sizeof(monitor->name) - 1);
free(possiblyMoreAccurateMonitorName);
possiblyMoreAccurateMonitorName = NULL;
}
}
}
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);
_glfw_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 = _glfw_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;
// handle may have changed, update
EnumDisplayMonitors(NULL, NULL, monitorCallback, (LPARAM) _glfw.monitors[i]);
break;
}
}
if (i < disconnectedCount)
continue;
monitor = createMonitor(&adapter, &display);
if (!monitor)
{
_glfw_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)
{
_glfw_free(disconnected);
return;
}
_glfwInputMonitor(monitor, GLFW_CONNECTED, type);
}
}
for (i = 0; i < disconnectedCount; i++)
{
if (disconnected[i])
_glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0);
}
_glfw_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);
_glfwGetVideoModeWin32(monitor, &current);
if (_glfwCompareVideoModes(&current, 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 _glfwGetHMONITORContentScaleWin32(HMONITOR handle, float* xscale, float* yscale)
{
UINT xdpi, ydpi;
if (xscale)
*xscale = 0.f;
if (yscale)
*yscale = 0.f;
if (IsWindows8Point1OrGreater())
{
if (GetDpiForMonitor(handle, MDT_EFFECTIVE_DPI, &xdpi, &ydpi) != S_OK)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Failed to query monitor DPI");
return;
}
}
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 _glfwFreeMonitorWin32(_GLFWmonitor* monitor)
{
}
void _glfwGetMonitorPosWin32(_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 _glfwGetMonitorContentScaleWin32(_GLFWmonitor* monitor,
float* xscale, float* yscale)
{
_glfwGetHMONITORContentScaleWin32(monitor->win32.handle, xscale, yscale);
}
void _glfwGetMonitorWorkareaWin32(_GLFWmonitor* monitor,
int* xpos, int* ypos,
int* width, int* height)
{
MONITORINFO mi = { sizeof(mi) };
GetMonitorInfoW(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* _glfwGetVideoModesWin32(_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*) _glfw_realloc(result, size * sizeof(GLFWvidmode));
}
(*count)++;
result[*count - 1] = mode;
}
if (!*count)
{
// HACK: Report the current mode if no valid modes were found
result = _glfw_calloc(1, sizeof(GLFWvidmode));
_glfwGetVideoModeWin32(monitor, result);
*count = 1;
}
return result;
}
void _glfwGetVideoModeWin32(_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 _glfwGetGammaRampWin32(_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 _glfwSetGammaRampWin32(_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;
}
#endif // _GLFW_WIN32
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