<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 12pt; color: #000000"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Aug 15, 2016 at 10:52 AM, Frediano Ziglio <span dir="ltr"><<a href="mailto:fziglio@redhat.com" target="_blank">fziglio@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=""><div class="h5">><br>
> The Direct3D 9 API operates on either the Windows XP display driver<br>
> model (XPDM) or the Windows Vista display driver model (WDDM), depending<br>
> on the operating system installed.<br>
><br>
> This patch implements the WDDM interface while using the CCD API to do<br>
> so. Moreover it introduces multiple monitors support and arbitrary<br>
> resolution for Windows 10 while preserving backward compatiblity with<br>
> previous<br>
> versions of Windows.<br>
><br>
> Based on a patch by Sandy Stutsman <<a href="mailto:sstutsma@redhat.com" target="_blank">sstutsma@redhat.com</a>><br>
><br>
> Signed-off-by: Dmitry Fleytman <<a href="mailto:dfleytma@redhat.com" target="_blank">dfleytma@redhat.com</a>><br>
> Signed-off-by: Sameeh Jubran <<a href="mailto:sameeh@daynix.com" target="_blank">sameeh@daynix.com</a>><br>
> ---<br>
> vdagent/display_configuration.cpp | 355<br>
> +++++++++++++++++++++++++++++++++++++-<br>
> vdagent/display_configuration.h | 47 +++++<br>
> 2 files changed, 401 insertions(+), 1 deletion(-)<br>
><br>
> diff --git a/vdagent/display_configuration.cpp<br>
> b/vdagent/display_configuration.cpp<br>
> index 5e40d05..4db093f 100755<br>
> --- a/vdagent/display_configuration.cpp<br>
> +++ b/vdagent/display_configuration.cpp<br>
> @@ -152,6 +152,54 @@ struct DISPLAYCONFIG_PATH_INFO {<br>
> UINT32 flags;<br>
> };<br>
><br>
> +<br>
> +enum D3DKMT_ESCAPETYPE {<br>
> + D3DKMT_ESCAPE_DRIVERPRIVATE = 0<br>
> +};<br>
> +<br>
> +struct D3DDDI_ESCAPEFLAGS {<br>
> + union {<br>
> + struct {<br>
> + UINT Reserved : 31;<br>
> + };<br>
> + UINT Value;<br>
> + };<br>
> +};<br>
> +<br>
> +struct D3DKMT_ESCAPE {<br>
> + D3D_HANDLE hAdapter;<br>
> + D3D_HANDLE hDevice;<br>
> + D3DKMT_ESCAPETYPE Type;<br>
> + D3DDDI_ESCAPEFLAGS Flags;<br>
> + VOID* pPrivateDriverData;<br>
> + UINT PrivateDriverDataSize;<br>
> + D3D_HANDLE hContext;<br>
> +};<br>
> +<br>
> +struct D3DKMT_OPENADAPTERFROMHDC {<br>
> + HDC hDc;<br>
> + D3D_HANDLE hAdapter;<br>
> + LUID AdapterLuid;<br>
> + UINT VidPnSourceId;<br>
> +};<br>
> +<br>
> +struct D3DKMT_CLOSEADAPTER {<br>
> + D3D_HANDLE hAdapter;<br>
> +};<br>
> +<br>
> +struct D3DKMT_OPENADAPTERFROMDEVICENAME {<br>
> + const WCHAR *pDeviceName;<br>
> + D3D_HANDLE hAdapter;<br>
> + LUID AdapterLuid;<br>
> +};<br>
> +<br>
> +struct D3DKMT_OPENADAPTERFROMGDIDISPLAYNAME {<br>
> + WCHAR DeviceName[32];<br>
> + D3D_HANDLE hAdapter;<br>
> + LUID AdapterLuid;<br>
> + UINT VidPnSourceId;<br>
> +};<br>
> +<br><br></div></div>Where these definition came from ?<br></blockquote><div>We have already discussed this in previous versions of the patches:</div><div><a href="https://mail.google.com/mail/u/0/#search/in%3Asent+from+scratch/15650fbeba9cfd30" target="_blank">https://mail.google.com/mail/u/0/#search/in%3Asent+from+scratch/15650fbeba9cfd30</a><br></div><div>We have written from scratch the ones that we didn't find here:</div><div><a href="https://github.com/notr1ch/DWMCapture/blob/master/DWMCaptureSource.cpp" target="_blank">https://github.com/notr1ch/DWMCapture/blob/master/DWMCaptureSource.cpp</a><br data-mce-bogus="1"></div></div></div></div></blockquote><div><div>Just put a comment.</div><div>And the "written from scratch" does not make sense, it's an API and you cannot get these</div><div>information from nothing, you need to know the protocol.</div></div><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="h5"><br>
> struct QXLMonitorEscape {<br>
> QXLMonitorEscape(DEVMODE* dev_mode)<br>
> {<br>
> @@ -174,10 +222,43 @@ struct QxlCustomEscapeObj : public<br>
> QXLEscapeSetCustomDisplay {<br>
> QxlCustomEscapeObj() {};<br>
> };<br>
><br>
> +struct WDDMCustomDisplayEscape {<br>
> + WDDMCustomDisplayEscape(DEVMODE* dev_mode)<br>
> + {<br>
> + _ioctl = QXL_ESCAPE_SET_CUSTOM_DISPLAY;<br>
> + _custom.bpp = dev_mode->dmBitsPerPel;<br>
> + _custom.xres = dev_mode->dmPelsWidth;<br>
> + _custom.yres = dev_mode->dmPelsHeight;<br>
> + }<br>
> + int _ioctl;<br>
> + QXLEscapeSetCustomDisplay _custom;<br>
> +};<br>
> +<br>
> +struct WDDMMonitorConfigEscape {<br>
> + WDDMMonitorConfigEscape(DisplayMode* mode)<br>
> + {<br>
> + _ioctl = QXL_ESCAPE_MONITOR_CONFIG;<br>
> + _<a href="http://head.id" rel="noreferrer" target="_blank">head.id</a> = _head.surface_id = 0;<br>
> + _head.x = mode->get_pos_x();<br>
> + _head.y = mode->get_pos_y();<br>
> + _head.width = mode->get_width();<br>
> + _head.height = mode->get_height();<br>
> + }<br>
> + int _ioctl;<br>
> + QXLHead _head;<br>
> +};<br>
> +<br>
> DisplayConfig* DisplayConfig::create_config()<br>
> {<br>
> DisplayConfig* new_interface;<br>
> - new_interface = new XPDMInterface();<br>
> + /* Try to open a WDDM adapter.<br>
> + If that failed, assume we have an XPDM driver */<br>
> + try {<br>
> + new_interface = new WDDMInterface();<br>
> + }<br>
> + catch (std::exception& e) {<br>
> + new_interface = new XPDMInterface();<br>
> + }<br>
> return new_interface;<br>
> }<br>
><br>
> @@ -326,6 +407,278 @@ bool XPDMInterface::find_best_mode(LPCTSTR Device,<br>
> DEVMODE* dev_mode)<br>
> return NT_SUCCESS(status);<br>
> }<br>
><br>
> +WDDMInterface::WDDMInterface()<br>
> + : _pfnOpen_adapter_hdc(NULL)<br>
> + , _pfnClose_adapter(NULL)<br>
> + , _pfnEscape(NULL)<br>
> + , _pfnOpen_adapter_device_name(NULL)<br>
> + , _pfnOpen_adapter_gdi_name(NULL)<br>
> +{<br>
> + LONG error(0);<br>
> + //Can we find the D3D calls we need?<br>
> + if (!init_d3d_api()) {<br>
> + throw std::exception();<br>
> + }<br>
> +<br>
> + //Initialize CCD path stuff<br>
> + if (!_ccd.query_display_config()) {<br>
> + throw std::exception();<br>
> + }<br>
> +<br>
> + if (!_ccd.set_display_config(error)) {<br>
> + throw std::exception();<br>
> + }<br>
> +}<br>
> +<br>
> +bool WDDMInterface::is_attached(DISPLAY_DEVICE* dev_info)<br>
> +{<br>
> + return _ccd.is_attached(dev_info->DeviceName);<br>
> +}<br>
> +<br>
> +bool WDDMInterface::set_monitor_state(LPCTSTR device_name, DEVMODE*<br>
> dev_mode, MONITOR_STATE state)<br>
> +{<br>
> + return _ccd.set_path_state(device_name, state);<br>
> +}<br>
> +<br>
> +bool WDDMInterface::custom_display_escape(LPCTSTR device_name, DEVMODE*<br>
> dev_mode)<br>
> +{<br>
> + DISPLAYCONFIG_MODE_INFO* mode = _ccd.get_active_mode(device_name,<br>
> false);<br>
> + if (!mode) {<br>
> + return false;<br>
> + }<br>
> +<br>
> + //Don't bother if we are already set to the new resolution<br>
> + if (mode->sourceMode.width == dev_mode->dmPelsWidth &&<br>
> + mode->sourceMode.height == dev_mode->dmPelsHeight) {<br>
> + return true;<br>
> + }<br>
> +<br>
> + vd_printf("%s: updating %S resolution\n", __FUNCTION__, device_name);<br>
> +<br>
> + WDDMCustomDisplayEscape wddm_escape(dev_mode);<br>
> + if (escape(device_name, &wddm_escape, sizeof(wddm_escape))) {<br><br></div></div>This is not portable, not even between 32 and 64 bit.<br></blockquote><div><br></div><div>Can you please further explain why? </div></div></div></div></blockquote><div><br></div><div><div>You are sending to the driver a structure that you defined here.</div><div>Usually there is an header that both include which is used to make sure you are</div><div>using the same structure layout. Also you have to define the structure in order (on a</div><div>system that can have 32/64 bit mixed) avoid bit size problems.</div><div><br></div><div>Now you send two structure which are</div><div><br></div><div>struct Xxx {</div><div> int ioctl;</div><div> shared_defined_structure ioctl_data;</div><div>};</div><div><br></div><div>depending on shared_defined_structure alignment the structure layout between 32 and 64</div><div>can potentially change. You are lucky and the 2 structure have the same alignment</div><div>on both sizes (QXLHead and QXLEscapeSetCustomDisplay are packed so</div><div>aligned to 4 bytes) and the alignment is compatible with int.<br>So now works but it's not hard to break this adding a new escape ioctl that does not</div><div>follow these rules. So what's the rule? A packed structure after an int?</div><div>Potentially this will cause the protocol to have unaligned accesses if a field should</div><div>be 8-byte aligned (for instance a pointer/handle). Intel architecture have just some speed</div><div>penalty but if you define the protocol differently you can avoid this penalty.</div><div>If you look at ioctl structures rarely they are packet for this reason.</div><div><br></div></div><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class=""><br>
> + return _ccd.update_mode_size(device_name, dev_mode);<br>
> + }<br>
> +<br>
> + vd_printf("%s: (%dx%d)", __FUNCTION__, mode->sourceMode.width,<br>
> mode->sourceMode.height);<br>
> + return false;<br>
> +}<br>
> +<br>
> +bool WDDMInterface::update_monitor_config(LPCTSTR device_name, DisplayMode*<br>
> display_mode,<br>
> + DEVMODE* dev_mode)<br>
> +{<br>
> + if (!display_mode || !display_mode->get_attached()) {<br>
> + return false;<br>
> + }<br>
> + DISPLAYCONFIG_MODE_INFO* mode = _ccd.get_active_mode(device_name,<br>
> false);<br>
> + if (!mode || !_send_monitors_config)<br>
> + return false;<br>
> +<br>
> + WDDMMonitorConfigEscape wddm_escape(display_mode);<br>
> + if (escape(device_name, &wddm_escape, sizeof(wddm_escape))) {<br>
<br>
</span>Same as above. It's not clear who is receiving these escape commands...<br>
the driver?<br></blockquote><div>Yes the driver is receiving those escape commands.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="h5"><br>
> + //Update the path position<br>
> + return _ccd.update_mode_position(device_name, dev_mode);<br>
> + }<br>
> +<br>
> + vd_printf("%s: %S failed", __FUNCTION__, device_name);<br>
> + return false;<br>
> +<br>
> +}<br>
> +<br>
> +LONG WDDMInterface::update_display_settings()<br>
> +{<br>
> + LONG error(0);<br>
> + //If we removed the primary monitor since the last call, we need to<br>
> + //reorder the other monitors, making the leftmost one the primary<br>
> + _ccd.verify_primary_position();<br>
> + _ccd.set_display_config(error);<br>
> + return error;<br>
> +}<br>
> +<br>
> +void WDDMInterface::update_config_path()<br>
> +{<br>
> + _ccd.query_display_config();<br>
> +}<br>
> +<br>
> +bool WDDMInterface::update_dev_mode_position(LPCTSTR device_name, DEVMODE*<br>
> dev_mode,<br>
> + LONG x, LONG y)<br>
> +{<br>
> + //Convert the position so that the primary is always at (0,0)<br><br></div></div>This comment does not make any sense here.<br><div><div class="h5"><br>
> + dev_mode->dmPosition.x = x;<br>
> + dev_mode->dmPosition.y = y;<br>
> + return _ccd.update_mode_position(device_name, dev_mode);<br>
> +}<br>
> +<br>
> +bool WDDMInterface::init_d3d_api()<br>
> +{<br>
> + HMODULE hModule = LoadLibrary(L"gdi32.dll");<br>
> +<br>
> + //Look for the gdi32 functions we need to perform driver escapes<br>
> + if (!hModule) {<br>
> + vd_printf("%s something wildly wrong as we can't open gdi32.dll",<br>
> __FUNCTION__);<br>
> + return false;<br>
> + }<br>
> +<br>
> + do {<br>
> + _pfnClose_adapter = (PFND3DKMT_CLOSEADAPTER)<br>
> + GetProcAddress(hModule, "D3DKMTCloseAdapter");<br>
> + if (!_pfnClose_adapter) {<br>
> + break;<br>
> + }<br>
> +<br>
> + _pfnEscape = (PFND3DKMT_ESCAPE) GetProcAddress(hModule,<br>
> "D3DKMTEscape");<br>
> + if (!_pfnEscape) {<br>
> + break;<br>
> + }<br>
> +<br>
> + _pfnOpen_adapter_hdc = (PFND3DKMT_OPENADAPTERFROMHDC)<br>
> + GetProcAddress(hModule, "D3DKMTOpenAdapterFromHdc");<br>
> + if (!_pfnOpen_adapter_hdc) {<br>
> + break;<br>
> + }<br>
> +<br>
> + _pfnOpen_adapter_device_name = (PFND3DKMT_OPENADAPTERFROMDEVICENAME)<br>
> + GetProcAddress(hModule, "D3DKMTOpenAdapterFromDeviceName");<br>
> + if (!_pfnOpen_adapter_device_name) {<br>
> + break;<br>
> + }<br>
> +<br>
> + _pfnOpen_adapter_gdi_name =<br>
> (PFND3DKMT_OPENADAPTERFROMGDIDISPLAYNAME)<br>
> + GetProcAddress(hModule, "D3DKMTOpenAdapterFromGdiDisplayName");<br>
> + if (!_pfnOpen_adapter_gdi_name) {<br>
> + break;<br>
> + }<br>
> +<br>
> + }<br>
> + while(0);<br>
> +<br>
> + FreeLibrary(hModule);<br>
> +<br><br></div></div>If the library was loaded the program is going to crash as the function<br>
will disappear from memory.<br></blockquote><div><br></div><div>I'll use GetModuleHandle instead.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class=""><br>
> + //Did we get them ?<br>
> + if (!_pfnClose_adapter || !_pfnOpen_adapter_hdc || !_pfnEscape) {<br>
> + return false;<br>
> + }<br>
> + return true;<br>
> +}<br>
> +<br>
> +D3D_HANDLE WDDMInterface::adapter_handle(LPCTSTR device_name)<br>
> +{<br>
> + D3D_HANDLE hAdapter(0);<br>
> +<br>
> + //For some reason, unknown to me, this call will occasionally fail.<br>
<br>
</span>Who is the "me" here? Would be better to make it explicit.<br><div><div class="h5"><br>
> + if ((hAdapter = handle_from_DC(device_name))) {<br>
> + return hAdapter;<br>
> + }<br>
> + //So try other available methods.<br>
> + if (_pfnOpen_adapter_device_name && (hAdapter =<br>
> handle_from_device_name(device_name))) {<br>
> + return hAdapter;<br>
> + }<br>
> + //One last chance to open this guy<br>
> + if (_pfnOpen_adapter_gdi_name) {<br>
> + hAdapter = handle_from_GDI_name(device_name);<br>
> + }<br>
> +<br>
> + if (!hAdapter) {<br>
> + vd_printf("%s: failed to open adapter %S", __FUNCTION__,<br>
> device_name);<br>
> + }<br>
> +<br>
> + return hAdapter;<br>
> +}<br>
> +<br>
> +D3D_HANDLE WDDMInterface::handle_from_DC(LPCTSTR adapter_name)<br>
> +{<br>
> + NTSTATUS status;<br>
> + D3DKMT_OPENADAPTERFROMHDC open_data;<br>
> + HDC hDc(CreateDC(adapter_name, NULL, NULL, NULL));<br>
> +<br>
> + if (!hDc) {<br>
> + vd_printf("%s: %S CreateDC failed with %lu", __FUNCTION__,<br>
> adapter_name, GetLastError());<br>
> + return 0;<br>
> + }<br>
> +<br>
> + ZeroMemory(&open_data, sizeof(D3DKMT_OPENADAPTERFROMHDC));<br>
> + open_data.hDc = hDc;<br>
> +<br>
> + if (!NT_SUCCESS(status = _pfnOpen_adapter_hdc(&open_data))) {<br>
> + vd_printf("%s: %S open adapter from hdc failed with %lu",<br>
> __FUNCTION__, adapter_name,<br>
> + status);<br>
> + open_data.hAdapter = 0;<br>
> + }<br>
> +<br>
> + DeleteDC(hDc);<br>
> + return open_data.hAdapter;<br>
> +}<br>
> +<br>
> +D3D_HANDLE WDDMInterface::handle_from_device_name(LPCTSTR adapter_name)<br>
> +{<br>
> + D3DKMT_OPENADAPTERFROMDEVICENAME display_name_data;<br>
> + NTSTATUS status;<br>
> +<br>
> + ZeroMemory(&display_name_data, sizeof(display_name_data));<br>
> + display_name_data.pDeviceName = adapter_name;<br>
> +<br>
> + if (NT_SUCCESS(status =<br>
> _pfnOpen_adapter_device_name(&display_name_data))) {<br>
> + return display_name_data.hAdapter;<br>
> + }<br>
> +<br>
> + vd_printf("%s %S failed with 0x%lx", __FUNCTION__, adapter_name,<br>
> status);<br>
> + return 0;<br>
> +}<br>
> +<br>
> +D3D_HANDLE WDDMInterface::handle_from_GDI_name(LPCTSTR adapter_name)<br>
> +{<br>
> + D3DKMT_OPENADAPTERFROMGDIDISPLAYNAME gdi_display_name;<br>
> + NTSTATUS status;<br>
> +<br>
> + ZeroMemory(&gdi_display_name, sizeof(gdi_display_name));<br>
> + memcpy((void *) gdi_display_name.DeviceName, adapter_name,<br>
> sizeof(TCHAR)* CCHDEVICENAME);<br>
> +<br><br></div></div>This assume adapter_name is into a buffer of CCHDEVICENAME characters so<br>
can in theory overflow. As the destination buffer is already 0 filled<br>
would be better a strncpy style function. The void * conversion is useless<br>
and misleading.</blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div class="h5"><br>
> + if (NT_SUCCESS(status = _pfnOpen_adapter_gdi_name(&gdi_display_name))) {<br>
> + return gdi_display_name.hAdapter;<br>
> + }<br>
> +<br>
> + vd_printf("%s: %S aurrrgghh nothing works..error is 0x%lx",<br>
> __FUNCTION__, adapter_name,<br>
> + status);<br>
> + return 0;<br>
> +}<br>
> +<br>
> +void WDDMInterface::close_adapter(D3D_HANDLE handle)<br>
> +{<br>
> + D3DKMT_CLOSEADAPTER closeData;<br>
> + if (handle) {<br>
> + closeData.hAdapter = handle;<br>
> + _pfnClose_adapter(&closeData);<br>
> + }<br>
> +}<br>
> +<br>
> +bool WDDMInterface::escape(LPCTSTR device_name, void* data, UINT size_data)<br>
> +{<br>
> + D3DKMT_ESCAPE escapeData;<br>
> + NTSTATUS status;<br>
> + D3D_HANDLE hAdapter(0);<br>
> +<br>
> + if (!(hAdapter = adapter_handle(device_name)))<br>
> + return false;<br>
> +<br>
> + escapeData.hAdapter = hAdapter;<br>
> + escapeData.hDevice = 0;<br>
> + escapeData.hContext = 0;<br>
> + escapeData.Type = D3DKMT_ESCAPE_DRIVERPRIVATE;<br>
> + escapeData.Flags.Value = 0;<br>
> + escapeData.pPrivateDriverData = data;<br>
> + escapeData.PrivateDriverDataSize = size_data;<br>
> +<br>
> + status = _pfnEscape(&escapeData);<br>
> +<br>
> + if (!NT_SUCCESS(status)) {<br>
> + vd_printf("%s: this should never happen. Status is 0x%lx",<br>
> __FUNCTION__, status);<br>
> + }<br>
> +<br>
> + //Close the handle to this device<br>
> + close_adapter(hAdapter);<br>
> + return NT_SUCCESS(status);<br>
> +}<br>
> +<br>
> CCD::CCD()<br>
> :_numPathElements(0)<br>
> ,_numModeElements(0)<br>
> diff --git a/vdagent/display_configuration.h<br>
> b/vdagent/display_configuration.h<br>
> index 05b35f4..e5ee90d 100755<br>
> --- a/vdagent/display_configuration.h<br>
> +++ b/vdagent/display_configuration.h<br>
> @@ -125,4 +125,51 @@ private:<br>
> bool find_best_mode(LPCTSTR Device, DEVMODE* dev_mode);<br>
> };<br>
><br>
> +//DisplayConfig implementation for guest with WDDM graphics drivers<br>
> +typedef UINT D3D_HANDLE;<br>
> +<br>
> +struct D3DKMT_ESCAPE;<br>
> +struct D3DKMT_OPENADAPTERFROMGDIDISPLAYNAME;<br>
> +struct D3DKMT_OPENADAPTERFROMDEVICENAME;<br>
> +struct D3DKMT_CLOSEADAPTER;<br>
> +struct D3DKMT_OPENADAPTERFROMHDC;<br>
> +<br>
> +typedef NTSTATUS(APIENTRY* PFND3DKMT_ESCAPE)(CONST D3DKMT_ESCAPE*);<br>
> +typedef NTSTATUS(APIENTRY*<br>
> PFND3DKMT_OPENADAPTERFROMGDIDISPLAYNAME)(D3DKMT_OPENADAPTERFROMGDIDISPLAYNAME*);<br>
> +typedef NTSTATUS(APIENTRY*<br>
> PFND3DKMT_OPENADAPTERFROMDEVICENAME)(D3DKMT_OPENADAPTERFROMDEVICENAME*);<br>
> +typedef NTSTATUS(APIENTRY* PFND3DKMT_CLOSEADAPTER)(D3DKMT_CLOSEADAPTER*);<br>
> +typedef NTSTATUS(APIENTRY*<br>
> PFND3DKMT_OPENADAPTERFROMHDC)(D3DKMT_OPENADAPTERFROMHDC*);<br>
> +<br>
> +class WDDMInterface : public DisplayConfig {<br>
> +public:<br>
> + WDDMInterface();<br>
> + bool is_attached(DISPLAY_DEVICE* dev_info);<br>
> + bool set_monitor_state(LPCTSTR device_name, DEVMODE* dev_mode,<br>
> MONITOR_STATE state);<br>
> + LONG update_display_settings();<br>
> + bool custom_display_escape(LPCTSTR device_name, DEVMODE* dev_mode);<br>
> + bool update_monitor_config(LPCTSTR device_name, DisplayMode* mode,<br>
> DEVMODE* dev_mode);<br>
> + bool update_dev_mode_position(LPCTSTR device_name, DEVMODE * dev_mode,<br>
> LONG x, LONG y);<br>
> + void update_config_path();<br>
> +<br>
> +private:<br>
> + bool init_d3d_api();<br>
> + D3D_HANDLE adapter_handle(LPCTSTR device_name);<br>
> + D3D_HANDLE handle_from_DC(LPCTSTR adapter_name);<br>
> + D3D_HANDLE handle_from_device_name(LPCTSTR adapter_name);<br>
> + D3D_HANDLE handle_from_GDI_name(LPCTSTR adapter_name);<br>
> +<br>
> + void close_adapter(D3D_HANDLE handle);<br>
> + bool escape(LPCTSTR device_name, void* data, UINT sizeData);<br>
> +<br>
> + //GDI Function pointers<br>
> + PFND3DKMT_OPENADAPTERFROMHDC _pfnOpen_adapter_hdc;<br>
> + PFND3DKMT_CLOSEADAPTER _pfnClose_adapter;<br>
> + PFND3DKMT_ESCAPE _pfnEscape;<br>
> + PFND3DKMT_OPENADAPTERFROMDEVICENAME _pfnOpen_adapter_device_name;<br>
> + PFND3DKMT_OPENADAPTERFROMGDIDISPLAYNAME _pfnOpen_adapter_gdi_name;<br>
> +<br>
> + //object handles the CCD API<br>
> + CCD _ccd;<br>
> +};<br>
> +<br>
> #endif<br>
> \ No newline at end of file<br><br></div></div>The update_ prefix is confusing. I would personally use set/get/query/read/write.<br>
The reason is that is not clear if they are updating a class internal state (so<br>
reading from the device) or updating the device state or a mix of the two.<br></blockquote></div></div></div></blockquote><div><br>Frediano</div><div><br></div></div></body></html>