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get display DPI info to scale mouse movement

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This commit is contained in:
Quantum 2021-01-04 16:01:24 -05:00 committed by Geoffrey McRae
parent 0bd5f0b2f1
commit 7e4d323427
10 changed files with 123 additions and 36 deletions
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17
common/include/common/KVMFR.h
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@ -57,7 +57,7 @@ typedef enum CursorType
CursorType;
#define KVMFR_MAGIC "KVMFR---"
#define KVMFR_VERSION 5
#define KVMFR_VERSION 6
typedef struct KVMFR
{
@ -80,12 +80,13 @@ KVMFRCursor;
typedef struct KVMFRFrame
{
uint32_t formatVer; // the frame format version number
FrameType type; // the frame data type
uint32_t width; // the width
uint32_t height; // the height
uint32_t stride; // the row stride (zero if compressed data)
uint32_t pitch; // the row pitch (stride in bytes or the compressed frame size)
uint32_t offset; // offset from the start of this header to the FrameBuffer header
uint32_t formatVer; // the frame format version number
FrameType type; // the frame data type
uint32_t width; // the width
uint32_t height; // the height
uint32_t stride; // the row stride (zero if compressed data)
uint32_t pitch; // the row pitch (stride in bytes or the compressed frame size)
uint32_t offset; // offset from the start of this header to the FrameBuffer header
uint32_t mouseScalePercent; // movement scale factor of the mouse (relates to DPI of display, 100 = no scale)
}
KVMFRFrame;

25
common/include/common/dpi.h Normal file
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@ -0,0 +1,25 @@
/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017-2020 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
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, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <windows.h>
// At 100% scaling, Windows reports 96 DPI.
#define DPI_100_PERCENT 96
UINT monitor_dpi(HMONITOR hMonitor);

1
common/src/platform/windows/CMakeLists.txt
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@ -7,6 +7,7 @@ include_directories(
add_library(lg_common_platform_code STATIC
crash.c
dpi.c
sysinfo.c
thread.c
event.c

37
common/src/platform/windows/dpi.c Normal file
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@ -0,0 +1,37 @@
#include "common/dpi.h"
#include "common/windebug.h"
typedef enum MONITOR_DPI_TYPE {
MDT_EFFECTIVE_DPI,
MDT_ANGULAR_DPI,
MDT_RAW_DPI,
MDT_DEFAULT
} MONITOR_DPI_TYPE;
typedef HRESULT (WINAPI *GetDpiForMonitor_t)(HMONITOR hmonitor, MONITOR_DPI_TYPE dpiType, UINT * dpiX, UINT * dpiY);
UINT monitor_dpi(HMONITOR hMonitor)
{
HMODULE shcore = LoadLibraryA("shcore.dll");
if (!shcore)
{
DEBUG_ERROR("Could not load shcore.dll");
return DPI_100_PERCENT;
}
GetDpiForMonitor_t GetDpiForMonitor = (GetDpiForMonitor_t) GetProcAddress(shcore, "GetDpiForMonitor");
if (!GetDpiForMonitor)
{
DEBUG_ERROR("Could not find GetDpiForMonitor");
return DPI_100_PERCENT;
}
UINT dpiX, dpiY;
HRESULT status = GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY);
if (FAILED(status))
{
DEBUG_WINERROR("GetDpiForMonitor failed", status);
return DPI_100_PERCENT;
}
return dpiX;
}

1
host/include/interface/capture.h
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@ -93,6 +93,7 @@ typedef struct CaptureInterface
bool (*deinit )();
void (*free )();
unsigned int (*getMaxFrameSize)();
unsigned int (*getMouseScale )();
CaptureResult (*capture )();
CaptureResult (*waitFrame )(CaptureFrame * frame);

6
host/platform/Linux/capture/XCB/src/xcb.c
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@ -169,6 +169,11 @@ static unsigned int xcb_getMaxFrameSize()
return this->width * this->height * 4;
}
static unsigned int xcb_getMouseScale()
{
return 100;
}
static CaptureResult xcb_capture()
{
assert(this);
@ -241,6 +246,7 @@ struct CaptureInterface Capture_XCB =
.deinit = xcb_deinit,
.free = xcb_free,
.getMaxFrameSize = xcb_getMaxFrameSize,
.getMouseScale = xcb_getMouseScale,
.capture = xcb_capture,
.waitFrame = xcb_waitFrame,
.getFrame = xcb_getFrame,

29
host/platform/Windows/capture/DXGI/src/dxgi.c
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@ -24,6 +24,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "common/option.h"
#include "common/locking.h"
#include "common/event.h"
#include "common/dpi.h"
#include <assert.h>
#include <stdatomic.h>
@ -98,12 +99,12 @@ struct iface
unsigned int pitch;
unsigned int stride;
CaptureFormat format;
unsigned int dpi;
int lastPointerX, lastPointerY;
bool lastPointerVisible;
};
static bool dpiDone = false;
static struct iface * this = NULL;
// forwards
@ -210,22 +211,6 @@ static bool dxgi_init()
DEBUG_INFO("looking-glass-host.exe InstallService");
}
// this is required for DXGI 1.5 support to function
if (!dpiDone)
{
DECLARE_HANDLE(DPI_AWARENESS_CONTEXT);
#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT)-4)
typedef BOOL (*User32_SetProcessDpiAwarenessContext)(DPI_AWARENESS_CONTEXT value);
HMODULE user32 = LoadLibraryA("user32.dll");
User32_SetProcessDpiAwarenessContext fn;
fn = (User32_SetProcessDpiAwarenessContext)GetProcAddress(user32, "SetProcessDpiAwarenessContext");
if (fn)
fn(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
FreeLibrary(user32);
dpiDone = true;
}
HRESULT status;
DXGI_OUTPUT_DESC outputDesc;
@ -388,6 +373,7 @@ static bool dxgi_init()
IDXGIAdapter1_GetDesc1(this->adapter, &adapterDesc);
this->width = outputDesc.DesktopCoordinates.right - outputDesc.DesktopCoordinates.left;
this->height = outputDesc.DesktopCoordinates.bottom - outputDesc.DesktopCoordinates.top;
this->dpi = monitor_dpi(outputDesc.Monitor);
++this->formatVer;
DEBUG_INFO("Device Descripion: %ls" , adapterDesc.Description);
@ -688,6 +674,14 @@ static unsigned int dxgi_getMaxFrameSize()
return this->height * this->pitch;
}
static unsigned int dxgi_getMouseScale()
{
assert(this);
assert(this->initialized);
return this->dpi * 100 / DPI_100_PERCENT;
}
static CaptureResult dxgi_hResultToCaptureResult(const HRESULT status)
{
switch(status)
@ -1013,6 +1007,7 @@ struct CaptureInterface Capture_DXGI =
.deinit = dxgi_deinit,
.free = dxgi_free,
.getMaxFrameSize = dxgi_getMaxFrameSize,
.getMouseScale = dxgi_getMouseScale,
.capture = dxgi_capture,
.waitFrame = dxgi_waitFrame,
.getFrame = dxgi_getFrame

15
host/platform/Windows/capture/NVFBC/src/nvfbc.c
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@ -25,6 +25,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
#include "common/framebuffer.h"
#include "common/event.h"
#include "common/thread.h"
#include "common/dpi.h"
#include <assert.h>
#include <stdlib.h>
#include <windows.h>
@ -44,6 +45,7 @@ struct iface
unsigned int maxWidth , maxHeight;
unsigned int width , height;
unsigned int dpi;
unsigned int formatVer;
unsigned int grabWidth, grabHeight, grabStride;
@ -65,7 +67,7 @@ static struct iface * this = NULL;
static void nvfbc_free();
static int pointerThread(void * unused);
static void getDesktopSize(unsigned int * width, unsigned int * height)
static void getDesktopSize(unsigned int * width, unsigned int * height, unsigned int * dpi)
{
HMONITOR monitor = MonitorFromWindow(GetDesktopWindow(), MONITOR_DEFAULTTOPRIMARY);
MONITORINFO monitorInfo = {
@ -73,6 +75,7 @@ static void getDesktopSize(unsigned int * width, unsigned int * height)
};
GetMonitorInfo(monitor, &monitorInfo);
*dpi = monitor_dpi(monitor);
CloseHandle(monitor);
*width = monitorInfo.rcMonitor.right - monitorInfo.rcMonitor.left;
@ -163,7 +166,7 @@ static bool nvfbc_create(
static bool nvfbc_init()
{
this->stop = false;
getDesktopSize(&this->width, &this->height);
getDesktopSize(&this->width, &this->height, &this->dpi);
lgResetEvent(this->frameEvent);
HANDLE event;
@ -245,9 +248,14 @@ static unsigned int nvfbc_getMaxFrameSize()
return this->maxWidth * this->maxHeight * 4;
}
static unsigned int nvfbc_getMouseScale()
{
return this->dpi * 100 / DPI_100_PERCENT;
}
static CaptureResult nvfbc_capture()
{
getDesktopSize(&this->width, &this->height);
getDesktopSize(&this->width, &this->height, &this->dpi);
NvFBCFrameGrabInfo grabInfo;
CaptureResult result = NvFBCToSysCapture(
this->nvfbc,
@ -397,6 +405,7 @@ struct CaptureInterface Capture_NVFBC =
.deinit = nvfbc_deinit,
.free = nvfbc_free,
.getMaxFrameSize = nvfbc_getMaxFrameSize,
.getMouseScale = nvfbc_getMouseScale,
.capture = nvfbc_capture,
.waitFrame = nvfbc_waitFrame,
.getFrame = nvfbc_getFrame

13
host/platform/Windows/src/platform.c
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@ -226,6 +226,18 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
// setup a handler for ctrl+c
SetConsoleCtrlHandler(CtrlHandler, TRUE);
// enable high DPI awareness
// this is required for DXGI 1.5 support to function and also capturing desktops with high DPI
DECLARE_HANDLE(DPI_AWARENESS_CONTEXT);
#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT)-4)
typedef BOOL (*User32_SetProcessDpiAwarenessContext)(DPI_AWARENESS_CONTEXT value);
HMODULE user32 = GetModuleHandle("user32.dll");
User32_SetProcessDpiAwarenessContext fn;
fn = (User32_SetProcessDpiAwarenessContext)GetProcAddress(user32, "SetProcessDpiAwarenessContext");
if (fn)
fn(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
// create a message window so that our message pump works
WNDCLASSEX wx = {};
wx.cbSize = sizeof(WNDCLASSEX);
@ -249,7 +261,6 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
app.messageWnd = CreateWindowEx(0, MAKEINTATOM(class), NULL, 0, 0, 0, 0, 0, NULL, NULL, hInstance, NULL);
// this is needed so that unprivileged processes can send us this message
HMODULE user32 = GetModuleHandle("user32.dll");
_ChangeWindowMessageFilterEx = (PChangeWindowMessageFilterEx)GetProcAddress(user32, "ChangeWindowMessageFilterEx");
if (_ChangeWindowMessageFilterEx)
_ChangeWindowMessageFilterEx(app.messageWnd, app.trayRestartMsg, MSGFLT_ALLOW, NULL);

15
host/src/app.c
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@ -186,13 +186,14 @@ static int frameThread(void * opaque)
continue;
}
fi->formatVer = frame.formatVer;
fi->width = frame.width;
fi->height = frame.height;
fi->stride = frame.stride;
fi->pitch = frame.pitch;
fi->offset = pageSize - FrameBufferStructSize;
frameValid = true;
fi->formatVer = frame.formatVer;
fi->width = frame.width;
fi->height = frame.height;
fi->stride = frame.stride;
fi->pitch = frame.pitch;
fi->offset = pageSize - FrameBufferStructSize;
fi->mouseScalePercent = app.iface->getMouseScale();
frameValid = true;
// put the framebuffer on the border of the next page
// this is to allow for aligned DMA transfers by the receiver