[Spice-devel] Fwd: [vdagent-win PATCH] Use Windows coordinates with primary monitor at (0, 0) when making WinAPI calls.
Sandy Stutsman
sstutsma at redhat.com
Fri Mar 20 16:06:41 PDT 2015
Ping!
I've got a few more reviews that I sent out a while ago. I'll forward them again.
Thanks for your attention.
-S
----- Forwarded Message -----
From: sstutsma at redhat.com
To: sstuts at gmail.com
Cc: "Sandy Stutsman" <sstutsma at redhat.com>
Sent: Monday, March 9, 2015 1:32:59 PM
Subject: [vdagent-win PATCH] Use Windows coordinates with primary monitor at (0,0) when making WinAPI calls.
From: Sandy Stutsman <sstutsma at redhat.com>
Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1174129. Windows
sets the monitor positioned at (0,0) to be the primary monitor.
While VDAgent normalizes the monitor positions so that there no negative
coordinates. If the normalized positions passed to the Windows APIs,
the leftmost monitor will always be set to primary. We need to keep
track of the primary monitor and its normalized position to be able to
adjust the monitor coordinates that are passed to Windows.
---
vdagent/desktop_layout.cpp | 31 +++++++++++++++++++++++++++----
vdagent/desktop_layout.h | 8 +++++---
2 files changed, 32 insertions(+), 7 deletions(-)
mode change 100644 => 100755 vdagent/desktop_layout.cpp
diff --git a/vdagent/desktop_layout.cpp b/vdagent/desktop_layout.cpp
old mode 100644
new mode 100755
index 7850e6d..324e4ca
--- a/vdagent/desktop_layout.cpp
+++ b/vdagent/desktop_layout.cpp
@@ -90,6 +90,21 @@ void DesktopLayout::get_displays()
unlock();
}
+DisplayMode * DesktopLayout::get_primary_display()
+{
+ DisplayMode * mode;
+ boolean bFound(false);
+ for (unsigned int i = 0; i < get_display_count(); i++)
+ {
+ mode = _displays.at(i);
+ if (!mode) return mode;
+ if (mode->is_primary()) return mode;
+ }
+
+ //Default to the first display
+ return _displays.at(0);
+}
+
void DesktopLayout::set_displays()
{
DISPLAY_DEVICE dev_info;
@@ -107,6 +122,12 @@ void DesktopLayout::set_displays()
dev_info.cb = sizeof(dev_info);
ZeroMemory(&dev_mode, sizeof(dev_mode));
dev_mode.dmSize = sizeof(dev_mode);
+
+ //Get the normalized position of the primary monitor
+ DisplayMode * primary(get_primary_display());
+ LONG normal_x = primary ? primary->get_pos_x() : 0;
+ LONG normal_y = primary ? primary->get_pos_y() : 0;
+
while (EnumDisplayDevices(NULL, dev_id, &dev_info, 0)) {
dev_id++;
if (dev_info.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER) {
@@ -121,7 +142,7 @@ 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), true)) {
+ if (!init_dev_mode(dev_info.DeviceName, &dev_mode,
_displays.at(display_id), normal_x, normal_y, true)) {
vd_printf("No suitable mode found for display %S",
dev_info.DeviceName);
break;
}
@@ -240,7 +261,7 @@ bool DesktopLayout::get_qxl_device_id(WCHAR*
device_key, DWORD* device_id)
}
bool DesktopLayout::init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode,
DisplayMode* mode,
- bool set_pos)
+ LONG normal_x, LONG normal_y, bool
set_pos)
{
DWORD closest_diff = -1;
DWORD best = -1;
@@ -320,8 +341,10 @@ bool DesktopLayout::init_dev_mode(LPCTSTR dev_name,
DEVMODE* dev_mode, DisplayMo
}
dev_mode->dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
if (set_pos) {
- dev_mode->dmPosition.x = mode->_pos_x;
- dev_mode->dmPosition.y = mode->_pos_y;
+
+ //Convert the position so that the primary is always at (0,0)
+ dev_mode->dmPosition.x = mode->_pos_x - normal_x;
+ dev_mode->dmPosition.y = mode->_pos_y - normal_y;
dev_mode->dmFields |= DM_POSITION;
}
diff --git a/vdagent/desktop_layout.h b/vdagent/desktop_layout.h
index c43ff03..3abbe58 100644
--- a/vdagent/desktop_layout.h
+++ b/vdagent/desktop_layout.h
@@ -31,6 +31,7 @@ public:
, _depth (depth)
, _attached (attached)
{
+ _primary = (pos_x == 0 && pos_y == 0 && attached);
}
LONG get_pos_x() { return _pos_x;}
@@ -44,7 +45,7 @@ public:
void set_res(DWORD width, DWORD height, DWORD depth);
void set_depth(DWORD depth) { _depth = depth;}
void set_attached(bool attached) { _attached = attached;}
-
+ bool is_primary(){ return _primary; }
private:
LONG _pos_x;
LONG _pos_y;
@@ -52,7 +53,7 @@ private:
DWORD _height;
DWORD _depth;
bool _attached;
-
+ bool _primary;
friend class DesktopLayout;
};
@@ -74,10 +75,11 @@ public:
private:
void clean_displays();
void normalize_displays_pos();
+ DisplayMode * get_primary_display();
static bool consistent_displays();
static bool is_attached(LPCTSTR dev_name);
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, bool set_pos);
+ static bool init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode,
DisplayMode* mode, LONG normal_x, LONG normal_y, bool set_pos);
private:
mutex_t _mutex;
--
2.1.0
---
vdagent/desktop_layout.cpp | 34 ++++++++++++++++++++++++++++++----
vdagent/desktop_layout.h | 8 +++++---
2 files changed, 35 insertions(+), 7 deletions(-)
mode change 100644 => 100755 vdagent/desktop_layout.cpp
diff --git a/vdagent/desktop_layout.cpp b/vdagent/desktop_layout.cpp
old mode 100644
new mode 100755
index 7850e6d..1f82f2d
--- a/vdagent/desktop_layout.cpp
+++ b/vdagent/desktop_layout.cpp
@@ -90,6 +90,23 @@ void DesktopLayout::get_displays()
unlock();
}
+DisplayMode * DesktopLayout::get_primary_display()
+{
+ DisplayMode * mode;
+ boolean bFound(false);
+ for (unsigned int i = 0; i < get_display_count(); i++)
+ {
+ mode = _displays.at(i);
+ if (!mode)
+ return mode;
+ if (mode->is_primary())
+ return mode;
+ }
+
+ //Default to the first display
+ return _displays.at(0);
+}
+
void DesktopLayout::set_displays()
{
DISPLAY_DEVICE dev_info;
@@ -107,6 +124,12 @@ void DesktopLayout::set_displays()
dev_info.cb = sizeof(dev_info);
ZeroMemory(&dev_mode, sizeof(dev_mode));
dev_mode.dmSize = sizeof(dev_mode);
+
+ //Get the normalized position of the primary monitor
+ DisplayMode * primary(get_primary_display());
+ LONG normal_x = primary ? primary->get_pos_x() : 0;
+ LONG normal_y = primary ? primary->get_pos_y() : 0;
+
while (EnumDisplayDevices(NULL, dev_id, &dev_info, 0)) {
dev_id++;
if (dev_info.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER) {
@@ -121,7 +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), true)) {
+ if (!init_dev_mode(dev_info.DeviceName, &dev_mode, _displays.at(display_id),
+ normal_x, normal_y, true)) {
vd_printf("No suitable mode found for display %S", dev_info.DeviceName);
break;
}
@@ -240,7 +264,7 @@ bool DesktopLayout::get_qxl_device_id(WCHAR* device_key, DWORD* device_id)
}
bool DesktopLayout::init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode, DisplayMode* mode,
- bool set_pos)
+ LONG normal_x, LONG normal_y, bool set_pos)
{
DWORD closest_diff = -1;
DWORD best = -1;
@@ -320,8 +344,10 @@ bool DesktopLayout::init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode, DisplayMo
}
dev_mode->dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
if (set_pos) {
- dev_mode->dmPosition.x = mode->_pos_x;
- dev_mode->dmPosition.y = mode->_pos_y;
+
+ //Convert the position so that the primary is always at (0,0)
+ dev_mode->dmPosition.x = mode->_pos_x - normal_x;
+ dev_mode->dmPosition.y = mode->_pos_y - normal_y;
dev_mode->dmFields |= DM_POSITION;
}
diff --git a/vdagent/desktop_layout.h b/vdagent/desktop_layout.h
index c43ff03..3abbe58 100644
--- a/vdagent/desktop_layout.h
+++ b/vdagent/desktop_layout.h
@@ -31,6 +31,7 @@ public:
, _depth (depth)
, _attached (attached)
{
+ _primary = (pos_x == 0 && pos_y == 0 && attached);
}
LONG get_pos_x() { return _pos_x;}
@@ -44,7 +45,7 @@ public:
void set_res(DWORD width, DWORD height, DWORD depth);
void set_depth(DWORD depth) { _depth = depth;}
void set_attached(bool attached) { _attached = attached;}
-
+ bool is_primary(){ return _primary; }
private:
LONG _pos_x;
LONG _pos_y;
@@ -52,7 +53,7 @@ private:
DWORD _height;
DWORD _depth;
bool _attached;
-
+ bool _primary;
friend class DesktopLayout;
};
@@ -74,10 +75,11 @@ public:
private:
void clean_displays();
void normalize_displays_pos();
+ DisplayMode * get_primary_display();
static bool consistent_displays();
static bool is_attached(LPCTSTR dev_name);
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, bool set_pos);
+ static bool init_dev_mode(LPCTSTR dev_name, DEVMODE* dev_mode, DisplayMode* mode, LONG normal_x, LONG normal_y, bool set_pos);
private:
mutex_t _mutex;
--
2.1.0
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