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/* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- Win32Util.h
// Miscellaneous but useful Win32 API utility functions & classes.
// In particular, a set of classes which wrap GDI objects,
// and some to handle palettes.
#ifndef __RFB_WIN32_GDIUTIL_H__
#define __RFB_WIN32_GDIUTIL_H__
#include <rfb/ColourMap.h>
#include <rfb/PixelFormat.h>
#include <rfb/Rect.h>
#include <rfb_win32/TCharArray.h>
namespace rfb {
namespace win32 {
class LogicalPalette {
public:
LogicalPalette();
~LogicalPalette();
void setEntries(int start, int count, const Colour* cols);
HPALETTE getHandle() {return palette;}
protected:
HPALETTE palette;
int numEntries;
};
class DeviceContext {
public:
DeviceContext() : dc(0) {}
virtual ~DeviceContext() {}
operator HDC() const {return dc;}
PixelFormat getPF() const;
static PixelFormat getPF(HDC dc);
protected:
HDC dc;
};
class WindowDC : public DeviceContext {
public:
WindowDC(HWND wnd);
virtual ~WindowDC();
protected:
HWND hwnd;
};
class CompatibleDC : public DeviceContext {
public:
CompatibleDC(HDC existing);
virtual ~CompatibleDC();
};
class BitmapDC : public CompatibleDC {
public:
BitmapDC(HDC hdc, HBITMAP hbitmap);
~BitmapDC();
protected:
HBITMAP oldBitmap;
};
class CompatibleBitmap {
public:
CompatibleBitmap(HDC hdc, int width, int height);
virtual ~CompatibleBitmap();
operator HBITMAP() const {return hbmp;}
protected:
HBITMAP hbmp;
};
struct BitmapInfo {
BITMAPINFOHEADER bmiHeader;
union {
struct {
DWORD red;
DWORD green;
DWORD blue;
} mask;
RGBQUAD color[256];
};
};
inline void initMaxAndShift(DWORD mask, int* max, int* shift) {
for ((*shift) = 0; (mask & 1) == 0; (*shift)++) mask >>= 1;
(*max) = (rdr::U16)mask;
}
class PaletteSelector {
public:
PaletteSelector(HDC dc, HPALETTE pal);
~PaletteSelector();
bool isRedrawRequired() {return redrawRequired;}
protected:
HPALETTE oldPal;
HDC device;
bool redrawRequired;
};
struct IconInfo : public ICONINFO {
IconInfo(HICON icon);
~IconInfo();
};
struct ModuleFileName : public TCharArray {
ModuleFileName(HMODULE module=0);
};
struct FileVersionInfo : public TCharArray {
FileVersionInfo(const TCHAR* filename=0);
const TCHAR* getVerString(const TCHAR* name, DWORD langId = 0x080904b0);
};
bool splitPath(const TCHAR* path, TCHAR** dir, TCHAR** file);
class DynamicFnBase {
public:
DynamicFnBase(const TCHAR* dllName, const char* fnName);
~DynamicFnBase();
bool isValid() const {return fnPtr != 0;}
protected:
void* fnPtr;
HMODULE dllHandle;
};
template<class T> class DynamicFn : public DynamicFnBase {
public:
DynamicFn(const TCHAR* dllName, const char* fnName) : DynamicFnBase(dllName, fnName) {}
T operator *() const {return (T)fnPtr;};
};
// Structure containing info on the monitor nearest the window.
// Copes with multi-monitor OSes and older ones.
#if (WINVER >= 0x0500)
struct MonitorInfo : MONITORINFOEXA {
MonitorInfo(HWND hwnd);
};
#else
struct MonitorInfo {
MonitorInfo(HWND hwnd);
DWORD cbSize;
RECT rcMonitor;
RECT rcWork;
DWORD dwFlags;
char szDevice[1]; // Always null...
};
#endif
void moveToMonitor(HWND handle, const char* device);
class Handle {
public:
Handle(HANDLE h_=0) : h(h_) {}
~Handle() {
if (h) CloseHandle(h);
}
operator HANDLE() {return h;}
HANDLE h;
};
// Center the window to a rectangle, or to a parent window.
// Optionally, resize the window to lay within the rect or parent window
// If the parent window is NULL then the working area if the window's
// current monitor is used instead.
void centerWindow(HWND handle, const RECT& r, bool clipToRect=false);
void centerWindow(HWND handle, HWND parent, bool clipToRect=false);
// MsgBox helper function. Define rfb::win32::AppName somewhere in your
// code and MsgBox will use its value in informational messages.
extern TStr AppName;
int MsgBox(HWND parent, const TCHAR* message, UINT flags);
// Get the computer name
struct ComputerName : TCharArray {
ComputerName() : TCharArray(MAX_COMPUTERNAME_LENGTH+1) {
ULONG namelength = MAX_COMPUTERNAME_LENGTH+1;
if (!GetComputerName(buf, &namelength))
_tcscpy(buf, _T(""));
}
};
// Allocate and/or manage LocalAlloc memory.
struct LocalMem {
LocalMem(int size) : ptr(LocalAlloc(LMEM_FIXED, size)) {
if (!ptr) throw rdr::SystemException("LocalAlloc", GetLastError());
}
LocalMem(void* p) : ptr(p) {}
~LocalMem() {LocalFree(ptr);}
operator void*() {return ptr;}
void* takePtr() {
void* t = ptr; ptr = 0; return t;
}
void* ptr;
};
};
};
#endif
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