[Spice-devel] [vd_agent PATCH V3] Add monitors_config driver escape.

[Fabiano Fidêncio]

On Wed, Jun 24, 2015 at 8:36 PM, Sandy Stutsman <sstutsma at redhat.com> wrote:
>
> When a Windows guest uses the "Set Resolution" applet to change
> resolutions and/or monitor positions, this escape sends the new monitor
> configurations to the client via a new QXL driver escape.
>
> Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1202419
> ---
> Changes for v2
>    Removed call to set_display in  wnd_proc WM_DISPLAYCHANGE switch
>    Replaced driver specific escape structure with existing QXLHead
> ---
>  vdagent/desktop_layout.cpp | 32 ++++++++++++++++++++++++++++++--
>  vdagent/desktop_layout.h   |  2 +-
>  2 files changed, 31 insertions(+), 3 deletions(-)
>
> diff --git a/vdagent/desktop_layout.cpp b/vdagent/desktop_layout.cpp
> index f71abd0..0be5077 100644
> --- a/vdagent/desktop_layout.cpp
> +++ b/vdagent/desktop_layout.cpp
> @@ -16,6 +16,7 @@
>  */
>
>  #include <spice/qxl_windows.h>
> +#include <spice/qxl_dev.h>
>  #include "desktop_layout.h"
>  #include "vdlog.h"
>
> @@ -85,6 +86,7 @@ void DesktopLayout::get_displays()
>          _displays[display_id] = new DisplayMode(mode.dmPosition.x, mode.dmPosition.y,
>                                                  mode.dmPelsWidth, mode.dmPelsHeight,
>                                                  mode.dmBitsPerPel, attached);
> +        update_monitor_config(dev_info.DeviceName, _displays[display_id]);
>      }
>      normalize_displays_pos();
>      unlock();
> @@ -142,8 +144,8 @@ void DesktopLayout::set_displays()
>              vd_printf("display_id %lu out of range, #displays %zu" , display_id, _displays.size());
>              break;
>          }
> -        if (!init_dev_mode(dev_info.DeviceName, &dev_mode, _displays.at(display_id),
> -                           normal_x, normal_y, true)) {
> +        DisplayMode * mode(_displays.at(display_id));
> +        if (!init_dev_mode(dev_info.DeviceName, &dev_mode, mode, normal_x, normal_y, true)) {
>              vd_printf("No suitable mode found for display %S", dev_info.DeviceName);
>              break;
>          }
> @@ -152,6 +154,7 @@ void DesktopLayout::set_displays()
>                                             CDS_UPDATEREGISTRY | CDS_NORESET, NULL);
>          if (ret == DISP_CHANGE_SUCCESSFUL) {
>              dev_sets++;
> +            update_monitor_config(dev_info.DeviceName, mode);
>          }
>          if (!is_qxl) {
>              display_id++;
> @@ -355,3 +358,28 @@ bool DesktopLayout::init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode, DisplayMo
>      return true;
>  }
>
> +bool DesktopLayout::update_monitor_config(LPCTSTR dev_name, DisplayMode* mode)
> +{
> +    QXLHead MonitorConfig;
> +
> +    if (!mode || !mode->get_attached())
> +        return false;
> +
> +    HDC hdc = CreateDC(dev_name, NULL, NULL, NULL);
> +
> +    memset(&MonitorConfig, 0, sizeof(MonitorConfig));
> +    MonitorConfig.x = mode->_pos_x;
> +    MonitorConfig.y = mode->_pos_y;
> +    MonitorConfig.width = mode->_width;
> +    MonitorConfig.height = mode->_height;
> +
> +    int err = ExtEscape(hdc, QXL_ESCAPE_MONITOR_CONFIG,
> +        sizeof(QXLHead), (LPCSTR) &MonitorConfig, 0, NULL);
> +
> +    if (err < 0){
> +        vd_printf("can't update monitor config, may have an older driver");
> +    }
> +
> +    DeleteDC(hdc);
> +    return (err >= 0);
> +}
> diff --git a/vdagent/desktop_layout.h b/vdagent/desktop_layout.h
> index 4f6a042..0e310e3 100644
> --- a/vdagent/desktop_layout.h
> +++ b/vdagent/desktop_layout.h
> @@ -83,7 +83,7 @@ private:
>      static bool get_qxl_device_id(WCHAR* device_key, DWORD* device_id);
>      static bool init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode, DisplayMode* mode,
>                                LONG normal_x, LONG normal_y, bool set_pos);
> -
> +    static bool update_monitor_config(LPCTSTR dev_name, DisplayMode* mode);
>  private:
>      mutex_t _mutex;
>      Displays _displays;
> --
> 1.9.5.msysgit.0
>
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Looks good!
-- 
Fabiano Fidêncio