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IlushaShurupov 2023-08-20 11:27:47 +03:00 • committed by Ilya Shurupov
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/*
EasyTab.h - Single-header multi-platform tablet library
https://github.com/ApoorvaJ/EasyTab
----------------------------------------------------------------------------
USAGE
----------------------------------------------------------------------------
1) Add the following lines in exactly one of your cpp files to compile the
implementation.
#define EASYTAB_IMPLEMENTATION
#include "easytab.h"
2) Call EasyTab_Load() with correct parameters to initialize EasyTab. These
parameters vary per OS, so look at the function declarations or examples
below. Function returns EASYTAB_OK if initialization was successful.
3) Call EasyTab_HandleEvent() in your message-handling code. The function
returns EASYTAB_OK if the message was a tablet message, and
EASYTAB_EVENT_NOT_HANDLED otherwise.
4) Call EasyTab_Unload() in your shutdown code.
5) Once initialized, you can query tablet state using the EasyTab pointer.
e.g.:
EasyTab->PosX // X position of the pen
EasyTab->PosY // Y position of the pen
EasyTab->Pressure // Pressure of the pen ranging from 0.0f to 1.0f
For more info, have a look at the EasyTabInfo struct below.
* Add -lXi to compiler options to link XInput on Linux.
----------------------------------------------------------------------------
EXAMPLES
----------------------------------------------------------------------------
1) Windows:
int CALLBACK WinMain(...)
{
HWND Window;
...
if (EasyTab_Load(Window) != EASYTAB_OK) // Load
{
OutputDebugStringA("Tablet init failed\n");
}
...
// Once you've set up EasyTab loading, unloading and event handling,
// use the EasyTab variable at any point in your program to access
// the tablet state:
// EasyTab->PosX
// EasyTab->PosY
// EasyTab->Pressure
// For more tablet information, look at the EasyTabInfo struct.
...
EasyTab_Unload(); // Unload
}
LRESULT CALLBACK WindowProc(
HWND Window,
UINT Message,
WPARAM WParam,
LPARAM LParam)
{
if (EasyTab_HandleEvent(Window, Message, LParam, WParam) == EASYTAB_OK) // Event
{
return true; // Tablet event handled
}
switch (Message)
{
...
}
}
2) Linux:
int main(...)
{
Display* Disp;
Window Win;
...
if (EasyTab_Load(Disp, Win) != EASYTAB_OK) // Load
{
printf("Tablet init failed\n");
}
...
while (XPending(Disp)) // Event loop
{
XEvent Event;
XNextEvent(XlibDisplay, &Event);
if (EasyTab_HandleEvent(&Event) == EASYTAB_OK) // Event
{
continue; // Tablet event handled
}
switch (Event.type)
{
...
}
}
...
// Once you've set up EasyTab loading, unloading and event handling,
// use the EasyTab variable at any point in your program to access
// the tablet state:
// EasyTab->PosX
// EasyTab->PosY
// EasyTab->Pressure
// For more tablet information, look at the EasyTabInfo struct.
...
EasyTab_Unload(); // Unload
}
----------------------------------------------------------------------------
CREDITS
----------------------------------------------------------------------------
Apoorva Joshi apoorvaj.io
Sergio Gonzalez s3rg.io
This library is coded in the spirit of the stb libraries and follows the stb
guidelines.
*/
// TODO: Null checks and warnings for EasyTab
// TODO: Differentiate between stylus and eraser in the API
// TODO: Linux support for relative mode
// TODO: Documentation for relative mode
// =============================================================================
// EasyTab header section
// =============================================================================
#ifndef EASYTAB_H
#define EASYTAB_H
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#ifdef __linux__
#include <X11/extensions/XInput.h>
#endif // __linux__
#ifdef _WIN32
#include <windows.h>
#endif // _WIN32
typedef enum
{
EASYTAB_OK = 0,
// Errors
EASYTAB_MEMORY_ERROR = -1,
EASYTAB_X11_ERROR = -2,
EASYTAB_DLL_LOAD_ERROR = -3,
EASYTAB_WACOM_WIN32_ERROR = -4,
EASYTAB_INVALID_FUNCTION_ERROR = -5,
EASYTAB_EVENT_NOT_HANDLED = -16,
} EasyTabResult;
typedef enum
{
EASYTAB_TRACKING_MODE_SYSTEM = 0,
EASYTAB_TRACKING_MODE_RELATIVE = 1,
} EasyTabTrackingMode;
#ifdef WIN32
// -----------------------------------------------------------------------------
// wintab.h
// -----------------------------------------------------------------------------
#if 1
DECLARE_HANDLE(HMGR);
DECLARE_HANDLE(HCTX);
typedef DWORD WTPKT;
typedef DWORD FIX32;
// Messages
#if 1
#define WT_DEFBASE 0x7FF0
#define WT_MAXOFFSET 0xF
#define _WT_PACKET(b) ((b)+0)
#define _WT_CTXOPEN(b) ((b)+1)
#define _WT_CTXCLOSE(b) ((b)+2)
#define _WT_CTXUPDATE(b) ((b)+3)
#define _WT_CTXOVERLAP(b) ((b)+4)
#define _WT_PROXIMITY(b) ((b)+5)
#define _WT_INFOCHANGE(b) ((b)+6)
#define _WT_CSRCHANGE(b) ((b)+7) /* 1.1 */
#define _WT_PACKETEXT(b) ((b)+8) /* 1.4 */
#define _WT_MAX(b) ((b)+WT_MAXOFFSET)
#define WT_PACKET _WT_PACKET(WT_DEFBASE)
#define WT_CTXOPEN _WT_CTXOPEN(WT_DEFBASE)
#define WT_CTXCLOSE _WT_CTXCLOSE(WT_DEFBASE)
#define WT_CTXUPDATE _WT_CTXUPDATE(WT_DEFBASE)
#define WT_CTXOVERLAP _WT_CTXOVERLAP(WT_DEFBASE)
#define WT_PROXIMITY _WT_PROXIMITY(WT_DEFBASE)
#define WT_INFOCHANGE _WT_INFOCHANGE(WT_DEFBASE)
#define WT_CSRCHANGE _WT_CSRCHANGE(WT_DEFBASE) /* 1.1 */
#define WT_PACKETEXT _WT_PACKETEXT(WT_DEFBASE) /* 1.4 */
#define WT_MAX _WT_MAX(WT_DEFBASE)
#endif // Messages
// Flags
#if 1
#define CTX_NAME 1
#define CTX_OPTIONS 2
#define CTX_STATUS 3
#define CTX_LOCKS 4
#define CTX_MSGBASE 5
#define CTX_DEVICE 6
#define CTX_PKTRATE 7
#define CTX_PKTDATA 8
#define CTX_PKTMODE 9
#define CTX_MOVEMASK 10
#define CTX_BTNDNMASK 11
#define CTX_BTNUPMASK 12
#define CTX_INORGX 13
#define CTX_INORGY 14
#define CTX_INORGZ 15
#define CTX_INEXTX 16
#define CTX_INEXTY 17
#define CTX_INEXTZ 18
#define CTX_OUTORGX 19
#define CTX_OUTORGY 20
#define CTX_OUTORGZ 21
#define CTX_OUTEXTX 22
#define CTX_OUTEXTY 23
#define CTX_OUTEXTZ 24
#define CTX_SENSX 25
#define CTX_SENSY 26
#define CTX_SENSZ 27
#define CTX_SYSMODE 28
#define CTX_SYSORGX 29
#define CTX_SYSORGY 30
#define CTX_SYSEXTX 31
#define CTX_SYSEXTY 32
#define CTX_SYSSENSX 33
#define CTX_SYSSENSY 34
#define CTX_MAX 34
// Context option values
#define CXO_SYSTEM 0x0001
#define CXO_PEN 0x0002
#define CXO_MESSAGES 0x0004
#define CXO_MARGIN 0x8000
#define CXO_MGNINSIDE 0x4000
#define CXO_CSRMESSAGES 0x0008 /* 1.1 */
#define DVC_NAME 1
#define DVC_HARDWARE 2
#define DVC_NCSRTYPES 3
#define DVC_FIRSTCSR 4
#define DVC_PKTRATE 5
#define DVC_PKTDATA 6
#define DVC_PKTMODE 7
#define DVC_CSRDATA 8
#define DVC_XMARGIN 9
#define DVC_YMARGIN 10
#define DVC_ZMARGIN 11
#define DVC_X 12
#define DVC_Y 13
#define DVC_Z 14
#define DVC_NPRESSURE 15
#define DVC_TPRESSURE 16
#define DVC_ORIENTATION 17
#define DVC_ROTATION 18 /* 1.1 */
#define DVC_PNPID 19 /* 1.1 */
#define DVC_MAX 19
#define PK_CONTEXT 0x0001 // reporting context
#define PK_STATUS 0x0002 // status bits
#define PK_TIME 0x0004 // time stamp
#define PK_CHANGED 0x0008 // change bit vector
#define PK_SERIAL_NUMBER 0x0010 // packet serial number
#define PK_CURSOR 0x0020 // reporting cursor
#define PK_BUTTONS 0x0040 // button information
#define PK_X 0x0080 // x axis
#define PK_Y 0x0100 // y axis
#define PK_Z 0x0200 // z axis
#define PK_NORMAL_PRESSURE 0x0400 // normal or tip pressure
#define PK_TANGENT_PRESSURE 0x0800 // tangential or barrel pressure
#define PK_ORIENTATION 0x1000 // orientation info: tilts
#define PK_ROTATION 0x2000 // rotation info; 1.1
// constants for use with pktdef.h
#define PKEXT_ABSOLUTE 1
#define PKEXT_RELATIVE 2
#define WTI_DEFCONTEXT 3
#define WTI_DEFSYSCTX 4
#define WTI_DEVICES 100
#define WTI_DDCTXS 400 /* 1.1 */
#define WTI_DSCTXS 500 /* 1.1 */
#endif // Flags
typedef struct tagAXIS {
LONG axMin;
LONG axMax;
UINT axUnits;
FIX32 axResolution;
} AXIS, *PAXIS, NEAR *NPAXIS, FAR *LPAXIS;
#define LCNAMELEN 40
typedef struct tagLOGCONTEXTA {
char lcName[LCNAMELEN];
UINT lcOptions;
UINT lcStatus;
UINT lcLocks;
UINT lcMsgBase;
UINT lcDevice;
UINT lcPktRate;
WTPKT lcPktData;
WTPKT lcPktMode;
WTPKT lcMoveMask;
DWORD lcBtnDnMask;
DWORD lcBtnUpMask;
LONG lcInOrgX;
LONG lcInOrgY;
LONG lcInOrgZ;
LONG lcInExtX;
LONG lcInExtY;
LONG lcInExtZ;
LONG lcOutOrgX;
LONG lcOutOrgY;
LONG lcOutOrgZ;
LONG lcOutExtX;
LONG lcOutExtY;
LONG lcOutExtZ;
FIX32 lcSensX;
FIX32 lcSensY;
FIX32 lcSensZ;
BOOL lcSysMode;
int lcSysOrgX;
int lcSysOrgY;
int lcSysExtX;
int lcSysExtY;
FIX32 lcSysSensX;
FIX32 lcSysSensY;
} LOGCONTEXTA, *PLOGCONTEXTA, NEAR *NPLOGCONTEXTA, FAR *LPLOGCONTEXTA;
typedef struct tagEXTENSIONBASE { /* 1.4 */
HCTX nContext;
UINT nStatus;
DWORD nTime;
UINT nSerialNumber;
} EXTENSIONBASE;
#endif // wintab.h
// -----------------------------------------------------------------------------
#define PACKETDATA PK_X | PK_Y | PK_BUTTONS | PK_NORMAL_PRESSURE
#define PACKETMODE 0
// -----------------------------------------------------------------------------
// pktdef.h
// -----------------------------------------------------------------------------
#if 1
// TODO: Simplify this file if we have a fixed packet format.
// The macros here are too ugly.
#ifndef PACKETNAME
/* if no packet name prefix */
#define __PFX(x) x
#define __IFX(x,y) x ## y
#else
/* add prefixes and infixes to packet format names */
#define __PFX(x) __PFX2(PACKETNAME,x)
#define __PFX2(p,x) __PFX3(p,x)
#define __PFX3(p,x) p ## x
#define __IFX(x,y) __IFX2(x,PACKETNAME,y)
#define __IFX2(x,i,y) __IFX3(x,i,y)
#define __IFX3(x,i,y) x ## i ## y
#endif
#define __SFX2(x,s) __SFX3(x,s)
#define __SFX3(x,s) x ## s
#define __TAG __IFX(tag,PACKET)
#define __TYPES __PFX(PACKET), * __IFX(P,PACKET), NEAR * __IFX(NP,PACKET), FAR * __IFX(LP,PACKET)
#define __TAGE __IFX(tag,PACKETEXT)
#define __TYPESE __PFX(PACKETEXT), * __IFX(P,PACKETEXT), NEAR * __IFX(NP,PACKETEXT), FAR * __IFX(LP,PACKETEXT)
#define __DATA (__PFX(PACKETDATA))
#define __MODE (__PFX(PACKETMODE))
#define __EXT(x) __SFX2(__PFX(PACKET),x)
typedef struct __TAG {
#if (__DATA & PK_CONTEXT)
HCTX pkContext;
#endif
#if (__DATA & PK_STATUS)
UINT pkStatus;
#endif
#if (__DATA & PK_TIME)
DWORD pkTime;
#endif
#if (__DATA & PK_CHANGED)
WTPKT pkChanged;
#endif
#if (__DATA & PK_SERIAL_NUMBER)
UINT pkSerialNumber;
#endif
#if (__DATA & PK_CURSOR)
UINT pkCursor;
#endif
#if (__DATA & PK_BUTTONS)
DWORD pkButtons;
#endif
#if (__DATA & PK_X)
LONG pkX;
#endif
#if (__DATA & PK_Y)
LONG pkY;
#endif
#if (__DATA & PK_Z)
LONG pkZ;
#endif
#if (__DATA & PK_NORMAL_PRESSURE)
#if (__MODE & PK_NORMAL_PRESSURE)
/* relative */
int pkNormalPressure;
#else
/* absolute */
UINT pkNormalPressure;
#endif
#endif
#if (__DATA & PK_TANGENT_PRESSURE)
#if (__MODE & PK_TANGENT_PRESSURE)
/* relative */
int pkTangentPressure;
#else
/* absolute */
UINT pkTangentPressure;
#endif
#endif
#if (__DATA & PK_ORIENTATION)
ORIENTATION pkOrientation;
#endif
#if (__DATA & PK_ROTATION)
ROTATION pkRotation; /* 1.1 */
#endif
#ifndef NOWTEXTENSIONS
/* extensions begin here. */
#if (__EXT(FKEYS) == PKEXT_RELATIVE) || (__EXT(FKEYS) == PKEXT_ABSOLUTE)
UINT pkFKeys;
#endif
#if (__EXT(TILT) == PKEXT_RELATIVE) || (__EXT(TILT) == PKEXT_ABSOLUTE)
TILT pkTilt;
#endif
#endif
} __TYPES;
#ifndef NOWTEXTENSIONS
typedef struct __TAGE {
EXTENSIONBASE pkBase;
#if (__EXT(EXPKEYS) == PKEXT_RELATIVE) || (__EXT(EXPKEYS) == PKEXT_ABSOLUTE)
EXPKEYSDATA pkExpKeys; /* 1.4 */
#endif
#if (__EXT(TOUCHSTRIP) == PKEXT_RELATIVE) || (__EXT(TOUCHSTRIP) == PKEXT_ABSOLUTE)
SLIDERDATA pkTouchStrip; /* 1.4 */
#endif
#if (__EXT(TOUCHRING) == PKEXT_RELATIVE) || (__EXT(TOUCHRING) == PKEXT_ABSOLUTE)
SLIDERDATA pkTouchRing; /* 1.4 */
#endif
} __TYPESE;
#endif
#undef PACKETNAME
#undef __TAG
#undef __TAGE
#undef __TAG2
#undef __TYPES
#undef __TYPESE
#undef __TYPES2
#undef __DATA
#undef __MODE
#undef __PFX
#undef __PFX2
#undef __PFX3
#undef __IFX
#undef __IFX2
#undef __IFX3
#undef __SFX2
#undef __SFX3
#endif // pktdef.h
// -----------------------------------------------------------------------------
typedef UINT (WINAPI * WTINFOA) (UINT, UINT, LPVOID);
typedef HCTX (WINAPI * WTOPENA) (HWND, LPLOGCONTEXTA, BOOL);
typedef BOOL (WINAPI * WTGETA) (HCTX, LPLOGCONTEXTA);
typedef BOOL (WINAPI * WTSETA) (HCTX, LPLOGCONTEXTA);
typedef BOOL (WINAPI * WTCLOSE) (HCTX);
typedef BOOL (WINAPI * WTENABLE) (HCTX, BOOL);
typedef BOOL (WINAPI * WTPACKET) (HCTX, UINT, LPVOID);
typedef BOOL (WINAPI * WTOVERLAP) (HCTX, BOOL);
typedef BOOL (WINAPI * WTSAVE) (HCTX, LPVOID);
typedef BOOL (WINAPI * WTCONFIG) (HCTX, HWND);
typedef HCTX (WINAPI * WTRESTORE) (HWND, LPVOID, BOOL);
typedef BOOL (WINAPI * WTEXTSET) (HCTX, UINT, LPVOID);
typedef BOOL (WINAPI * WTEXTGET) (HCTX, UINT, LPVOID);
typedef BOOL (WINAPI * WTQUEUESIZESET) (HCTX, int);
typedef int (WINAPI * WTDATAPEEK) (HCTX, UINT, UINT, int, LPVOID, LPINT);
typedef int (WINAPI * WTPACKETSGET) (HCTX, int, LPVOID);
typedef HMGR (WINAPI * WTMGROPEN) (HWND, UINT);
typedef BOOL (WINAPI * WTMGRCLOSE) (HMGR);
typedef HCTX (WINAPI * WTMGRDEFCONTEXT) (HMGR, BOOL);
typedef HCTX (WINAPI * WTMGRDEFCONTEXTEX) (HMGR, UINT, BOOL);
#endif // WIN32
// -----------------------------------------------------------------------------
// Enums
// -----------------------------------------------------------------------------
/*
Use this enum in conjunction with EasyTab->Buttons to check for tablet button
presses.
e.g. To check for lower pen button press, use:
if (EasyTab->Buttons & EasyTab_Buttons_Pen_Lower)
{
// Lower button is pressed
}
*/
enum EasyTab_Buttons_
{
EasyTab_Buttons_Pen_Touch = 1 << 0, // Pen is touching tablet
EasyTab_Buttons_Pen_Lower = 1 << 1, // Lower pen button is pressed
EasyTab_Buttons_Pen_Upper = 1 << 2, // Upper pen button is pressed
};
// -----------------------------------------------------------------------------
// Structs
// -----------------------------------------------------------------------------
typedef struct
{
int32_t PosX, PosY;
float Pressure; // Range: 0.0f to 1.0f
int32_t Buttons; // Bit field. Use with the EasyTab_Buttons_ enum.
int32_t RangeX, RangeY;
int32_t MaxPressure;
#ifdef __linux__
XDevice* Device;
uint32_t MotionType;
XEventClass EventClasses[1024];
uint32_t NumEventClasses;
#endif // __linux__
#ifdef WIN32
HINSTANCE Dll;
HCTX Context;
WTINFOA WTInfoA;
WTOPENA WTOpenA;
WTGETA WTGetA;
WTSETA WTSetA;
WTCLOSE WTClose;
WTPACKET WTPacket;
WTENABLE WTEnable;
WTOVERLAP WTOverlap;
WTSAVE WTSave;
WTCONFIG WTConfig;
WTRESTORE WTRestore;
WTEXTSET WTExtSet;
WTEXTGET WTExtGet;
WTQUEUESIZESET WTQueueSizeSet;
WTDATAPEEK WTDataPeek;
WTPACKETSGET WTPacketsGet;
WTMGROPEN WTMgrOpen;
WTMGRCLOSE WTMgrClose;
WTMGRDEFCONTEXT WTMgrDefContext;
WTMGRDEFCONTEXTEX WTMgrDefContextEx;
#endif // WIN32
} EasyTabInfo;
extern EasyTabInfo* EasyTab;
// -----------------------------------------------------------------------------
// Function declarations
// -----------------------------------------------------------------------------
#if defined(__linux__)
EasyTabResult EasyTab_Load(Display* Disp, Window Win);
EasyTabResult EasyTab_HandleEvent(XEvent* Event);
void EasyTab_Unload(Display* Disp);
#elif defined(_WIN32)
EasyTabResult EasyTab_Load(HWND Window);
EasyTabResult EasyTab_Load_Ex(HWND Window,
EasyTabTrackingMode Mode,
float RelativeModeSensitivity,
int32_t MoveCursor);
EasyTabResult EasyTab_HandleEvent(HWND Window,
UINT Message,
LPARAM LParam,
WPARAM WParam);
void EasyTab_Unload();
#else
// Save some trouble when porting.
#error "Unsupported platform."
#endif // __linux__ _WIN32
// -----------------------------------------------------------------------------
#endif // EASYTAB_H
// =============================================================================
// EasyTab implementation section
// =============================================================================
#ifdef EASYTAB_IMPLEMENTATION
EasyTabInfo* EasyTab;
// -----------------------------------------------------------------------------
// Linux implementation
// -----------------------------------------------------------------------------
#ifdef __linux__
EasyTabResult EasyTab_Load(Display* Disp, Window Win)
{
EasyTab = (EasyTabInfo*)calloc(1, sizeof(EasyTabInfo)); // We want init to zero, hence calloc.
if (!EasyTab) { return EASYTAB_MEMORY_ERROR; }
int32_t Count;
XDeviceInfoPtr Devices = (XDeviceInfoPtr)XListInputDevices(Disp, &Count);
if (!Devices) { return EASYTAB_X11_ERROR; }
for (int32_t i = 0; i < Count; i++)
{
if (!strstr(Devices[i].name, "stylus") &&
!strstr(Devices[i].name, "eraser")) { continue; }
EasyTab->Device = XOpenDevice(Disp, Devices[i].id);
XAnyClassPtr ClassPtr = Devices[i].inputclassinfo;
for (int32_t j = 0; j < Devices[i].num_classes; j++)
{
#if defined(__cplusplus)
switch (ClassPtr->c_class)
#else
switch (ClassPtr->class)
#endif
{
case ValuatorClass:
{
XValuatorInfo *Info = (XValuatorInfo *)ClassPtr;
// X
if (Info->num_axes > 0)
{
int32_t min = Info->axes[0].min_value;
EasyTab->RangeX = Info->axes[0].max_value;
//printf("Max/min x values: %d, %d\n", min, EasyTab->RangeX); // TODO: Platform-print macro
}
// Y
if (Info->num_axes > 1)
{
int32_t min = Info->axes[1].min_value;
EasyTab->RangeY = Info->axes[1].max_value;
//printf("Max/min y values: %d, %d\n", min, EasyTab->RangeY);
}
// Pressure
if (Info->num_axes > 2)
{
int32_t min = Info->axes[2].min_value;
EasyTab->MaxPressure = Info->axes[2].max_value;
//printf("Max/min pressure values: %d, %d\n", min, EasyTab->MaxPressure);
}
XEventClass EventClass;
DeviceMotionNotify(EasyTab->Device, EasyTab->MotionType, EventClass);
if (EventClass)
{
EasyTab->EventClasses[EasyTab->NumEventClasses] = EventClass;
EasyTab->NumEventClasses++;
}
} break;
}
ClassPtr = (XAnyClassPtr) ((uint8_t*)ClassPtr + ClassPtr->length); // TODO: Access this as an array to avoid pointer arithmetic?
}
XSelectExtensionEvent(Disp, Win, EasyTab->EventClasses, EasyTab->NumEventClasses);
}
XFreeDeviceList(Devices);
if (EasyTab->Device != 0) { return EASYTAB_OK; }
else { return EASYTAB_X11_ERROR; }
}
EasyTabResult EasyTab_HandleEvent(XEvent* Event)
{
if (Event->type != EasyTab->MotionType) { return EASYTAB_EVENT_NOT_HANDLED; }
XDeviceMotionEvent* MotionEvent = (XDeviceMotionEvent*)(Event);
EasyTab->PosX = MotionEvent->x;
EasyTab->PosY = MotionEvent->y;
EasyTab->Pressure = (float)MotionEvent->axis_data[2] / (float)EasyTab->MaxPressure;
return EASYTAB_OK;
}
void EasyTab_Unload(Display* Disp)
{
XCloseDevice(Disp, EasyTab->Device);
free(EasyTab);
EasyTab = NULL;
}
#endif // __linux__
// -----------------------------------------------------------------------------
// Windows implementation
// -----------------------------------------------------------------------------
#ifdef WIN32
#define GETPROCADDRESS(type, func) \
EasyTab->func = (type)GetProcAddress(EasyTab->Dll, #func); \
if (!EasyTab->func) \
{ \
OutputDebugStringA("Function " #func " not found in Wintab32.dll.\n"); \
return EASYTAB_INVALID_FUNCTION_ERROR; \
}
EasyTabResult EasyTab_Load(HWND Window)
{
return EasyTab_Load_Ex(Window, EASYTAB_TRACKING_MODE_SYSTEM, 0, 1);
}
EasyTabResult EasyTab_Load_Ex(HWND Window,
EasyTabTrackingMode TrackingMode,
float RelativeModeSensitivity,
int32_t MoveCursor)
{
EasyTab = (EasyTabInfo*)calloc(1, sizeof(EasyTabInfo)); // We want init to zero, hence calloc.
if (!EasyTab) { return EASYTAB_MEMORY_ERROR; }
// Load Wintab DLL and get function addresses
{
EasyTab->Dll = LoadLibraryA("Wintab32.dll");
if (!EasyTab->Dll)
{
OutputDebugStringA("Wintab32.dll not found.\n");
return EASYTAB_DLL_LOAD_ERROR;
}
GETPROCADDRESS(WTINFOA , WTInfoA);
GETPROCADDRESS(WTOPENA , WTOpenA);
GETPROCADDRESS(WTGETA , WTGetA);
GETPROCADDRESS(WTSETA , WTSetA);
GETPROCADDRESS(WTCLOSE , WTClose);
GETPROCADDRESS(WTPACKET , WTPacket);
GETPROCADDRESS(WTENABLE , WTEnable);
GETPROCADDRESS(WTOVERLAP , WTOverlap);
GETPROCADDRESS(WTSAVE , WTSave);
GETPROCADDRESS(WTCONFIG , WTConfig);
GETPROCADDRESS(WTRESTORE , WTRestore);
GETPROCADDRESS(WTEXTSET , WTExtSet);
GETPROCADDRESS(WTEXTGET , WTExtGet);
GETPROCADDRESS(WTQUEUESIZESET , WTQueueSizeSet);
GETPROCADDRESS(WTDATAPEEK , WTDataPeek);
GETPROCADDRESS(WTPACKETSGET , WTPacketsGet);
GETPROCADDRESS(WTMGROPEN , WTMgrOpen);
GETPROCADDRESS(WTMGRCLOSE , WTMgrClose);
GETPROCADDRESS(WTMGRDEFCONTEXT , WTMgrDefContext);
GETPROCADDRESS(WTMGRDEFCONTEXTEX , WTMgrDefContextEx);
}
if (!EasyTab->WTInfoA(0, 0, NULL))
{
OutputDebugStringA("Wintab services not available.\n");
return EASYTAB_WACOM_WIN32_ERROR;
}
// Open context
{
LOGCONTEXTA LogContext = {0};
AXIS RangeX = {0};
AXIS RangeY = {0};
AXIS Pressure = {0};
EasyTab->WTInfoA(WTI_DDCTXS, 0, &LogContext);
EasyTab->WTInfoA(WTI_DEVICES, DVC_X, &RangeX);
EasyTab->WTInfoA(WTI_DEVICES, DVC_Y, &RangeY);
EasyTab->WTInfoA(WTI_DEVICES, DVC_NPRESSURE, &Pressure);
LogContext.lcPktData = PACKETDATA; // ??
LogContext.lcOptions |= CXO_MESSAGES;
if (MoveCursor) { LogContext.lcOptions |= CXO_SYSTEM; }
LogContext.lcPktMode = PACKETMODE;
LogContext.lcMoveMask = PACKETDATA;
LogContext.lcBtnUpMask = LogContext.lcBtnDnMask;
LogContext.lcOutOrgX = 0;
LogContext.lcOutOrgY = 0;
LogContext.lcOutExtX = GetSystemMetrics(SM_CXSCREEN);
LogContext.lcOutExtY = -GetSystemMetrics(SM_CYSCREEN);
LogContext.lcSysOrgX = 0;
LogContext.lcSysOrgY = 0;
LogContext.lcSysExtX = GetSystemMetrics(SM_CXSCREEN);
LogContext.lcSysExtY = GetSystemMetrics(SM_CYSCREEN);
if (TrackingMode == EASYTAB_TRACKING_MODE_RELATIVE)
{
LogContext.lcPktMode |= PK_X | PK_Y; // TODO: Should this be included in the
// PACKETMODE macro define up top?
LogContext.lcSysMode = 1;
if (RelativeModeSensitivity > 1.0f)
{
RelativeModeSensitivity = 1.0f;
}
else if (RelativeModeSensitivity < 0.0f)
{
RelativeModeSensitivity = 0.0f;
}
// Wintab expects sensitivity to be a 32-bit fixed point number
// with the radix point between the two words. Thus, the type
// contains 16 bits to the left of the radix point and 16 bits to
// the right of it.
//
// 0x10000 Hex
// = 65,536 Decimal
// = 0000 0000 0000 0001 . 0000 0000 0000 0000 Binary
// = 1.0 Fixed Point
uint32_t Sensitivity = (uint32_t)(0x10000 * RelativeModeSensitivity);
if (MoveCursor)
{
LogContext.lcSysSensX = LogContext.lcSysSensY = Sensitivity;
}
else
{
LogContext.lcSensX = LogContext.lcSensY = Sensitivity;
}
}
EasyTab->Context = EasyTab->WTOpenA(Window, &LogContext, TRUE);
if (!EasyTab->Context)
{
OutputDebugStringA("Wintab context couldn't be opened.\n");
return EASYTAB_WACOM_WIN32_ERROR;
}
// Get tablet capabilites
{
EasyTab->MaxPressure = Pressure.axMax;
EasyTab->RangeX = RangeX.axMax;
EasyTab->RangeY = RangeY.axMax;
}
}
return EASYTAB_OK;
}
#undef GETPROCADDRESS
EasyTabResult EasyTab_HandleEvent(HWND Window, UINT Message, LPARAM LParam, WPARAM WParam)
{
PACKET Packet = { 0 };
if (Message == WT_PACKET &&
(HCTX)LParam == EasyTab->Context &&
EasyTab->WTPacket(EasyTab->Context, (UINT)WParam, &Packet))
{
POINT Point = { 0 };
Point.x = Packet.pkX;
Point.y = Packet.pkY;
ScreenToClient(Window, &Point);
EasyTab->PosX = Point.x;
EasyTab->PosY = Point.y;
EasyTab->Pressure = (float)Packet.pkNormalPressure / (float)EasyTab->MaxPressure;
EasyTab->Buttons = Packet.pkButtons;
return EASYTAB_OK;
}
return EASYTAB_EVENT_NOT_HANDLED;
}
void EasyTab_Unload()
{
if (EasyTab->Context) { EasyTab->WTClose(EasyTab->Context); }
if (EasyTab->Dll) { FreeLibrary(EasyTab->Dll); }
free(EasyTab);
EasyTab = NULL;
}
#endif // WIN32
// -----------------------------------------------------------------------------
#endif // EASYTAB_IMPLEMENTATION

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