[Spice-devel] [PATCH win-vdagent v3 1/2] Introducing Windows CCD API
Sameeh Jubran
sameeh at daynix.com
Thu Aug 4 11:14:12 UTC 2016
The Connecting and Configuring Displays (CCD) Win32 APIs
provide more control over the desktop display setup. The CCD APIs
move away from using Windows Graphics Device Interface (GDI)
concepts like view name and toward Windows Display Driver Model
(WDDM) concepts like adapter, source, and target identifiers.
More info on the CCD API can be found here:
https://msdn.microsoft.com/en-us/library/windows/hardware/ff539590(v=vs.85).aspx
This patch introduces partial functionality from the CCD API
needed by vdagent. It is needed by vdagent in order to support
multiple monitors and arbitrary resolution on Windows 10.
Based on a patch by Sandy Stutsman <sstutsma at redhat.com>
Signed-off-by: Dmitry Fleytman <dfleytma at redhat.com>
Signed-off-by: Sameeh Jubran <sameeh at daynix.com>
---
Makefile.am | 2 +
vdagent/display_configuration.cpp | 504 ++++++++++++++++++++++++++++++++++++++
vdagent/display_configuration.h | 94 +++++++
3 files changed, 600 insertions(+)
create mode 100755 vdagent/display_configuration.cpp
create mode 100755 vdagent/display_configuration.h
diff --git a/Makefile.am b/Makefile.am
index c3fc6bf..84507e8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -31,6 +31,8 @@ vdagent_SOURCES = \
common/vdcommon.h \
common/vdlog.cpp \
common/vdlog.h \
+ vdagent/display_configuration.cpp \
+ vdagent/display_configuration.h \
vdagent/desktop_layout.cpp \
vdagent/desktop_layout.h \
vdagent/display_setting.cpp \
diff --git a/vdagent/display_configuration.cpp b/vdagent/display_configuration.cpp
new file mode 100755
index 0000000..d042c14
--- /dev/null
+++ b/vdagent/display_configuration.cpp
@@ -0,0 +1,504 @@
+/*
+Copyright (C) 2015 Red Hat, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of
+the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "display_configuration.h"
+#include <winternl.h>
+
+/* The following definitions and structures are taken
+from the wine project repository and can be found
+under: "wine/include/wingdi.h" */
+
+#define QDC_ALL_PATHS 0x00000001
+
+#define SDC_USE_SUPPLIED_DISPLAY_CONFIG 0x00000020
+#define SDC_APPLY 0x00000080
+#define SDC_FORCE_MODE_ENUMERATION 0x00001000
+
+#define DISPLAYCONFIG_PATH_ACTIVE 0x00000001
+#define DISPLAYCONFIG_PATH_MODE_IDX_INVALID 0xffffffff
+
+enum DISPLAYCONFIG_DEVICE_INFO_TYPE {
+ DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME = 1
+};
+
+enum DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY {};
+
+enum DISPLAYCONFIG_ROTATION {};
+
+enum DISPLAYCONFIG_SCANLINE_ORDERING {};
+
+enum DISPLAYCONFIG_SCALING {};
+
+enum DISPLAYCONFIG_PIXELFORMAT {};
+
+enum DISPLAYCONFIG_MODE_INFO_TYPE {};
+
+struct DISPLAYCONFIG_DEVICE_INFO_HEADER {
+ DISPLAYCONFIG_DEVICE_INFO_TYPE type;
+ UINT32 size;
+ LUID adapterId;
+ UINT32 id;
+};
+
+struct DISPLAYCONFIG_SOURCE_DEVICE_NAME {
+ DISPLAYCONFIG_DEVICE_INFO_HEADER header;
+ WCHAR viewGdiDeviceName[CCHDEVICENAME];
+};
+
+struct DISPLAYCONFIG_DESKTOP_IMAGE_INFO {
+ POINTL PathSourceSize;
+ RECTL DesktopImageRegion;
+ RECTL DesktopImageClip;
+};
+
+struct DISPLAYCONFIG_RATIONAL {
+ UINT32 Numerator;
+ UINT32 Denominator;
+};
+
+struct DISPLAYCONFIG_2DREGION {
+ UINT32 cx;
+ UINT32 cy;
+};
+
+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;
+};
+
+struct DISPLAYCONFIG_TARGET_MODE {
+ DISPLAYCONFIG_VIDEO_SIGNAL_INFO targetVideoSignalInfo;
+};
+
+struct DISPLAYCONFIG_SOURCE_MODE {
+ UINT32 width;
+ UINT32 height;
+ DISPLAYCONFIG_PIXELFORMAT pixelFormat;
+ POINTL position;
+};
+
+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;
+};
+
+struct DISPLAYCONFIG_PATH_SOURCE_INFO {
+ LUID adapterId;
+ UINT32 id;
+ union {
+ UINT32 modeInfoIdx;
+ struct {
+ UINT32 cloneGroupId :16;
+ UINT32 sourceModeInfoIdx :16;
+ } DUMMYSTRUCTNAME;
+ } DUMMYUNIONNAME;
+ UINT32 statusFlags;
+};
+
+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;
+};
+
+struct DISPLAYCONFIG_PATH_INFO {
+ DISPLAYCONFIG_PATH_SOURCE_INFO sourceInfo;
+ DISPLAYCONFIG_PATH_TARGET_INFO targetInfo;
+ UINT32 flags;
+};
+
+CCD::CCD()
+ :_NumPathElements(0)
+ ,_NumModeElements(0)
+ ,_pPathInfo(NULL)
+ ,_pModeInfo(NULL)
+ ,_pfnGetDeviceInfo(NULL)
+ ,_pfnGetDisplayConfigBufferSizes(NULL)
+ ,_pfnQueryDisplayConfig(NULL)
+ ,_pfnSetDisplayConfig(NULL)
+ ,_error(0)
+ ,_primary_detached(false)
+ ,_path_state(PATH_UPDATED)
+{
+ if (load_api()) {
+ get_config_buffers();
+ }
+}
+
+CCD::~CCD()
+{
+ free_config_buffers();
+}
+
+bool CCD::query_display_config()
+{
+ LONG query_error(ERROR_SUCCESS);
+
+ //Until we get it or error != ERROR_INSUFFICIENT_BUFFER
+ do {
+ query_error = _pfnQueryDisplayConfig(QDC_ALL_PATHS, &_NumPathElements, _pPathInfo,
+ &_NumModeElements, _pModeInfo, NULL);
+
+ // if ERROR_INSUFFICIENT_BUFFER need to retry QueryDisplayConfig
+ // to get a new set of config buffers
+ //(see https://msdn.microsoft.com/en-us/library/windows/hardware/ff569215(v=vs.85).aspx )
+ if (query_error) {
+ if (query_error == ERROR_INSUFFICIENT_BUFFER) {
+ free_config_buffers();
+ if (!get_config_buffers())
+ return false;
+ } else {
+ _error = query_error;
+ vd_printf("%s failed QueryDisplayConfig with 0x%lx", __FUNCTION__, _error);
+ return false;
+ }
+ }
+ } while(query_error);
+ _path_state = PATH_CURRENT;
+ return true;
+}
+
+DISPLAYCONFIG_MODE_INFO* CCD::get_active_mode(LPCTSTR device_name, bool return_on_error)
+{
+ DISPLAYCONFIG_PATH_INFO* active_path;
+
+ active_path = get_device_path(device_name, true);
+
+ if (!active_path ) {
+ vd_printf("%s:%S failed", __FUNCTION__, device_name);
+ return NULL;
+ }
+ return &_pModeInfo[active_path->sourceInfo.modeInfoIdx];
+}
+
+bool CCD::set_display_config() {
+
+ debug_print_config("Before SetDisplayConfig");
+
+ if (_path_state == PATH_CURRENT) {
+ vd_printf("%s: path states says nothing changed", __FUNCTION__);
+ return true;
+ }
+
+ if (!(_error = _pfnSetDisplayConfig(_NumPathElements, _pPathInfo,
+ _NumModeElements, _pModeInfo,
+ SDC_APPLY | SDC_USE_SUPPLIED_DISPLAY_CONFIG | SDC_FORCE_MODE_ENUMERATION))) {
+ return true;
+ }
+
+ vd_printf("%s failed SetDisplayConfig with 0x%lx", __FUNCTION__, _error);
+ debug_print_config("After failed SetDisplayConfig");
+ return false;
+}
+
+DISPLAYCONFIG_PATH_INFO* CCD::get_device_path(LPCTSTR device_name, bool bActive)
+{
+ //Search for device's active path
+ for (UINT32 i = 0; i < _NumPathElements; i++) {
+ DISPLAYCONFIG_PATH_INFO* path_info = &_pPathInfo[i];
+
+ //if bActive, return only paths that are currently active
+ if (bActive && !is_active_path(path_info))
+ continue;
+ if (!is_device_path(device_name, path_info))
+ continue;
+ return path_info;
+ }
+ _error = ERROR_GEN_FAILURE;
+ return NULL;
+}
+
+void CCD::debug_print_config(const char* prefix)
+{
+ TCHAR dev_name[CCHDEVICENAME];
+ for (UINT32 i = 0; i < _NumPathElements; i++) {
+ DISPLAYCONFIG_PATH_INFO* path_info = &_pPathInfo[i];
+ if (!(path_info->flags & DISPLAYCONFIG_PATH_ACTIVE))
+ continue;
+ get_device_name_config(path_info, dev_name);
+
+ if (path_info->sourceInfo.modeInfoIdx == DISPLAYCONFIG_PATH_MODE_IDX_INVALID) {
+ vd_printf("%s: %S [%s] This path is active but has invalid mode set.", __FUNCTION__,
+ dev_name, prefix);
+ continue;
+ }
+ DISPLAYCONFIG_MODE_INFO* mode = &_pModeInfo[path_info->sourceInfo.modeInfoIdx];
+ vd_printf("%s: %S [%s] (%ld,%ld) (%ux%u).", __FUNCTION__, dev_name, prefix,
+ mode->sourceMode.position.x, mode->sourceMode.position.y,
+ mode->sourceMode.width, mode->sourceMode.height);
+ }
+}
+
+bool CCD::load_api()
+{
+ HMODULE hModule = GetModuleHandle(L"user32.dll");
+ if(!hModule) {
+ return false;
+ }
+
+ bool bFound_all(false);
+ do {
+ if (!(_pfnGetDeviceInfo = (PDISPLAYCONFIG_GETDEVICEINFO)
+ GetProcAddress(hModule, "DisplayConfigGetDeviceInfo"))) {
+ break;
+ }
+
+ if (!(_pfnGetDisplayConfigBufferSizes = (PGETDISPLAYCONFIG_BUFFERSIZES)
+ GetProcAddress(hModule, "GetDisplayConfigBufferSizes"))) {
+ break;
+ }
+
+ if (!(_pfnQueryDisplayConfig = (PQUERYDISPLAYCONFIG)
+ GetProcAddress(hModule, "QueryDisplayConfig"))) {
+ break;
+ }
+
+ if (!(_pfnSetDisplayConfig = (PSETDISPLAYCONFIG)
+ GetProcAddress(hModule, "SetDisplayConfig"))) {
+ break;
+ }
+ bFound_all = true;
+ }
+ while(0);
+
+ return bFound_all;
+}
+
+bool CCD::get_config_buffers()
+{
+ //Get Config Buffer Sizes
+ free_config_buffers();
+ _error = _pfnGetDisplayConfigBufferSizes(QDC_ALL_PATHS, &_NumPathElements,
+ &_NumModeElements);
+ if (_error) {
+ vd_printf("%s: GetDisplayConfigBufferSizes failed with 0x%lx", __FUNCTION__, _error);
+ return false;
+ }
+
+ //Allocate arrays
+ _pPathInfo = new(std::nothrow) DISPLAYCONFIG_PATH_INFO[_NumPathElements];
+ _pModeInfo = new(std::nothrow) DISPLAYCONFIG_MODE_INFO[_NumModeElements];
+
+ if (!_pPathInfo || !_pModeInfo) {
+ vd_printf("%s OOM ", __FUNCTION__);
+ return false;
+ }
+
+ ///clear the above arrays
+ ZeroMemory(_pPathInfo, sizeof(DISPLAYCONFIG_PATH_INFO) * _NumPathElements);
+ ZeroMemory(_pModeInfo, sizeof(DISPLAYCONFIG_MODE_INFO) * _NumModeElements);
+ return true;
+}
+
+void CCD::free_config_buffers()
+{
+ delete[] (_pModeInfo);
+ _pModeInfo = NULL;
+ delete[] (_pPathInfo);
+ _pPathInfo = NULL;
+ _NumModeElements = _NumPathElements = 0;
+}
+
+bool CCD::get_device_name_config(DISPLAYCONFIG_PATH_INFO* path, LPCTSTR dev_name)
+{
+ DISPLAYCONFIG_SOURCE_DEVICE_NAME source_name;
+ source_name.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME;
+ source_name.header.size = sizeof(DISPLAYCONFIG_SOURCE_DEVICE_NAME);
+ source_name.header.adapterId = path->sourceInfo.adapterId;
+ source_name.header.id = path->sourceInfo.id;
+
+ _error = _pfnGetDeviceInfo(&source_name.header);
+ if (_error) {
+ vd_printf("%s DisplayConfigGetDeviceInfo failed with %lu", __FUNCTION__, _error);
+ return false;
+ }
+ memcpy((void *)dev_name, source_name.viewGdiDeviceName, CCHDEVICENAME* sizeof(TCHAR));
+ return true;
+}
+
+bool CCD::is_device_path(LPCTSTR device_name, DISPLAYCONFIG_PATH_INFO* path)
+{
+ //Does this path belong to device_name?
+ TCHAR dev_name[CCHDEVICENAME];
+ if (!get_device_name_config(path, dev_name)) {
+ return false;
+ }
+ if (_tcscmp(dev_name, device_name)) {
+ return false;
+ }
+ return true;
+}
+
+// If we have detached the primary monitor, then we need to reset the positions of the remaining
+// monitors to insure that at least one is positioned at (0,0)
+bool CCD::verify_primary_position()
+{
+ LONG leftmost_x(0);
+ if (!_primary_detached) {
+ return true;
+ }
+ _primary_detached = false;
+
+ for (UINT32 i = 0; i < _NumPathElements; i++) {
+ DISPLAYCONFIG_PATH_INFO* path_info = &_pPathInfo[i];
+ if (!(path_info->flags & DISPLAYCONFIG_PATH_ACTIVE))
+ continue;
+
+ DISPLAYCONFIG_MODE_INFO* mode = &_pModeInfo[path_info->sourceInfo.modeInfoIdx];
+ if (leftmost_x > mode->sourceMode.position.x) {
+ leftmost_x = mode->sourceMode.position.x;
+ }
+ }
+
+ if (leftmost_x == 0) {
+ return false;
+ }
+
+ for (UINT32 i = 0; i < _NumPathElements; i++) {
+ DISPLAYCONFIG_PATH_INFO* path_info = &_pPathInfo[i];
+ if ((!(path_info->flags & DISPLAYCONFIG_PATH_ACTIVE)))
+ continue;
+ DISPLAYCONFIG_MODE_INFO* mode = &_pModeInfo[path_info->sourceInfo.modeInfoIdx];
+ vd_printf("%s: setting mode x to %lu", __FUNCTION__, mode->sourceMode.position.x);
+ mode->sourceMode.position.x -= leftmost_x;
+ }
+ _path_state = PATH_UPDATED;
+ return true;
+}
+
+bool CCD::update_mode_position(LPCTSTR device_name, DEVMODE* dev_mode)
+{
+ DISPLAYCONFIG_MODE_INFO* mode = get_active_mode(device_name, false);
+ if (!mode)
+ return false;
+
+ mode->sourceMode.position.x = dev_mode->dmPosition.x;
+ mode->sourceMode.position.y = dev_mode->dmPosition.y;
+ vd_printf("%s: %S updated path mode to (%lu, %lu) - (%u x%u)", __FUNCTION__,
+ device_name,
+ mode->sourceMode.position.x, mode->sourceMode.position.y,
+ mode->sourceMode.width, mode->sourceMode.height);
+ _path_state = PATH_UPDATED;
+ return true;
+
+}
+
+bool CCD::update_mode_size(LPCTSTR device_name, DEVMODE* dev_mode)
+{
+ DISPLAYCONFIG_MODE_INFO* mode = get_active_mode(device_name, false);
+ if (!mode) {
+ return false;
+ }
+
+ mode->sourceMode.width = dev_mode->dmPelsWidth;
+ mode->sourceMode.height = dev_mode->dmPelsHeight;
+ vd_printf("%s: %S updated path mode to (%lu, %lu - (%u x %u)", __FUNCTION__,
+ device_name,
+ mode->sourceMode.position.x, mode->sourceMode.position.y,
+ mode->sourceMode.width, mode->sourceMode.height);
+ _path_state = PATH_UPDATED;
+ return true;
+}
+
+void CCD::update_detached_primary_state(LPCTSTR device_name, DISPLAYCONFIG_PATH_INFO * path_info)
+{
+ DISPLAYCONFIG_MODE_INFO* mode(get_active_mode(device_name, false));
+
+ //will need to reset monitor positions if primary detached
+ path_info->flags = path_info->flags & ~DISPLAYCONFIG_PATH_ACTIVE;
+ if (!mode|| mode->sourceMode.position.x != 0 || mode->sourceMode.position.y != 0) {
+ return ;
+ }
+ _primary_detached = true;
+}
+
+bool CCD::set_path_state(LPCTSTR device_name, MONITOR_STATE new_state)
+{
+ DISPLAYCONFIG_PATH_INFO* path(get_device_path(device_name, false));
+ MONITOR_STATE current_path_state(MONITOR_DETACHED);
+
+ if (path && (path->flags & DISPLAYCONFIG_PATH_ACTIVE)) {
+ current_path_state = MONITOR_ATTACHED;
+ }
+
+ //If state didn't change, nothing to do
+ if (current_path_state == new_state ) {
+ return true;
+ }
+
+ if (!path) {
+ return false;
+ }
+
+ _path_state = PATH_UPDATED;
+ if (new_state == MONITOR_DETACHED) {
+ update_detached_primary_state(device_name, path);
+ } else {
+ path->flags = path->flags | DISPLAYCONFIG_PATH_ACTIVE;
+ set_display_config();
+ }
+ return true;
+}
+
+bool CCD::is_attached(LPCTSTR device_name)
+{
+ DISPLAYCONFIG_PATH_INFO* path(get_device_path(device_name, false));
+ if (!path) {
+ return false;
+ }
+ return (path->flags & DISPLAYCONFIG_PATH_ACTIVE);
+}
+
+bool CCD::is_active_path(DISPLAYCONFIG_PATH_INFO * path)
+{
+ if (!path || !(path->flags & DISPLAYCONFIG_PATH_ACTIVE) ||
+ (path->sourceInfo.modeInfoIdx == DISPLAYCONFIG_PATH_MODE_IDX_INVALID)) {
+ return false;
+ }
+ return true;
+}
diff --git a/vdagent/display_configuration.h b/vdagent/display_configuration.h
new file mode 100755
index 0000000..4a1a7d4
--- /dev/null
+++ b/vdagent/display_configuration.h
@@ -0,0 +1,94 @@
+/*
+Copyright (C) 2015 Red Hat, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of
+the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef _H_DISPLAY_CONFIGURATION
+#define _H_DISPLAY_CONFIGURATION
+
+#include <spice/qxl_windows.h>
+#include <spice/qxl_dev.h>
+#include "desktop_layout.h"
+#include "vdlog.h"
+
+enum MONITOR_STATE {
+ MONITOR_DETACHED,
+ MONITOR_ATTACHED,
+};
+
+enum PATH_STATE {
+ PATH_UPDATED,
+ PATH_CURRENT,
+};
+
+enum DISPLAYCONFIG_TOPOLOGY_ID {};
+
+struct DISPLAYCONFIG_DEVICE_INFO_HEADER;
+struct DISPLAYCONFIG_MODE_INFO;
+struct DISPLAYCONFIG_PATH_INFO;
+
+//Makes calls into the CCD API for getting/setting display settings on WDDM drivers
+//Use is exclusive to wddm display config class
+
+typedef LONG(APIENTRY* PDISPLAYCONFIG_GETDEVICEINFO)(DISPLAYCONFIG_DEVICE_INFO_HEADER*);
+typedef LONG(APIENTRY* PGETDISPLAYCONFIG_BUFFERSIZES)(UINT32, UINT32*, UINT32*);
+typedef LONG(APIENTRY* PQUERYDISPLAYCONFIG)(UINT32, UINT32*, DISPLAYCONFIG_PATH_INFO*, UINT32*,
+ DISPLAYCONFIG_MODE_INFO*, DISPLAYCONFIG_TOPOLOGY_ID*);
+typedef LONG(APIENTRY* PSETDISPLAYCONFIG)(UINT32, DISPLAYCONFIG_PATH_INFO*, UINT32,
+ DISPLAYCONFIG_MODE_INFO*, UINT32);
+
+class CCD {
+public:
+ CCD();
+ ~CCD();
+
+ bool query_display_config();
+ bool set_display_config();
+ bool update_mode_position(LPCTSTR device_name, DEVMODE* dev_mode);
+ bool update_mode_size(LPCTSTR DeviceNmae, DEVMODE* dev_mode);
+ void update_detached_primary_state(LPCTSTR device_name, DISPLAYCONFIG_PATH_INFO * path_info);
+ bool set_path_state(LPCTSTR device_name, MONITOR_STATE state);
+ bool is_attached(LPCTSTR device_name);
+ bool is_active_path(DISPLAYCONFIG_PATH_INFO * path);
+ LONG error() { return _error; }
+ DISPLAYCONFIG_MODE_INFO* get_active_mode(LPCTSTR device_name, bool return_on_error);
+ DISPLAYCONFIG_PATH_INFO* get_device_path(LPCTSTR device_name, bool bActive);
+ bool verify_primary_position();
+ void debug_print_config(const char* prefix = NULL);
+
+private:
+ bool load_api();
+ bool get_config_buffers();
+ void free_config_buffers();
+ bool is_device_path(LPCTSTR device_name, DISPLAYCONFIG_PATH_INFO* path);
+ bool get_device_name_config(DISPLAYCONFIG_PATH_INFO* path, LPCTSTR dev_name);
+
+ //CCD API stuff
+ UINT32 _NumPathElements;
+ UINT32 _NumModeElements;
+ DISPLAYCONFIG_PATH_INFO* _pPathInfo;
+ DISPLAYCONFIG_MODE_INFO* _pModeInfo;
+
+ //CCD API function pointers
+ PDISPLAYCONFIG_GETDEVICEINFO _pfnGetDeviceInfo;
+ PGETDISPLAYCONFIG_BUFFERSIZES _pfnGetDisplayConfigBufferSizes;
+ PQUERYDISPLAYCONFIG _pfnQueryDisplayConfig;
+ PSETDISPLAYCONFIG _pfnSetDisplayConfig;
+
+ LONG _error;
+ bool _primary_detached;
+ PATH_STATE _path_state;
+};
+
+#endif
\ No newline at end of file
--
2.5.5
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