在CSDN上看到的一个网友写的,挺实用的.
unit uClosingEffect;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics;
const
WM_REDIRCREATE = WM_USER + 382;
WM_REDIRDESTROY = WM_USER + 383;
WM_REDIRCLOSING = WM_USER + 384;
REDIR_CHECK_INTERVAL = 50;
REDIR_CHECK_STEP = 4;
function BeginGrayscaleClosingEffect(Wnd: HWND; FadingTime: Cardinal = 1000): Cardinal;
procedure EndGrayscaleClosingEffect(ID: Cardinal; IsRestoring: Boolean = False);
var
AlphaColorTable : array [0..255, 0..255] of Byte;
GrayColorTable : array [0..2, 0..255] of Integer;
CRCTable : array [0..255] of DWORD =
( $00000000, $77073096, $EE0E612C, $990951BA,
$076DC419, $706AF48F, $E963A535, $9E6495A3,
$0EDB8832, $79DCB8A4, $E0D5E91E, $97D2D988,
$09B64C2B, $7EB17CBD, $E7B82D07, $90BF1D91,
$1DB71064, $6AB020F2, $F3B97148, $84BE41DE,
$1ADAD47D, $6DDDE4EB, $F4D4B551, $83D385C7,
$136C9856, $646BA8C0, $FD62F97A, $8A65C9EC,
$14015C4F, $63066CD9, $FA0F3D63, $8D080DF5,
$3B6E20C8, $4C69105E, $D56041E4, $A2677172,
$3C03E4D1, $4B04D447, $D20D85FD, $A50AB56B,
$35B5A8FA, $42B2986C, $DBBBC9D6, $ACBCF940,
$32D86CE3, $45DF5C75, $DCD60DCF, $ABD13D59,
$26D930AC, $51DE003A, $C8D75180, $BFD06116,
$21B4F4B5, $56B3C423, $CFBA9599, $B8BDA50F,
$2802B89E, $5F058808, $C60CD9B2, $B10BE924,
$2F6F7C87, $58684C11, $C1611DAB, $B6662D3D,
$76DC4190, $01DB7106, $98D220BC, $EFD5102A,
$71B18589, $06B6B51F, $9FBFE4A5, $E8B8D433,
$7807C9A2, $0F00F934, $9609A88E, $E10E9818,
$7F6A0DBB, $086D3D2D, $91646C97, $E6635C01,
$6B6B51F4, $1C6C6162, $856530D8, $F262004E,
$6C0695ED, $1B01A57B, $8208F4C1, $F50FC457,
$65B0D9C6, $12B7E950, $8BBEB8EA, $FCB9887C,
$62DD1DDF, $15DA2D49, $8CD37CF3, $FBD44C65,
$4DB26158, $3AB551CE, $A3BC0074, $D4BB30E2,
$4ADFA541, $3DD895D7, $A4D1C46D, $D3D6F4FB,
$4369E96A, $346ED9FC, $AD678846, $DA60B8D0,
$44042D73, $33031DE5, $AA0A4C5F, $DD0D7CC9,
$5005713C, $270241AA, $BE0B1010, $C90C2086,
$5768B525, $206F85B3, $B966D409, $CE61E49F,
$5EDEF90E, $29D9C998, $B0D09822, $C7D7A8B4,
$59B33D17, $2EB40D81, $B7BD5C3B, $C0BA6CAD,
$EDB88320, $9ABFB3B6, $03B6E20C, $74B1D29A,
$EAD54739, $9DD277AF, $04DB2615, $73DC1683,
$E3630B12, $94643B84, $0D6D6A3E, $7A6A5AA8,
$E40ECF0B, $9309FF9D, $0A00AE27, $7D079EB1,
$F00F9344, $8708A3D2, $1E01F268, $6906C2FE,
$F762575D, $806567CB, $196C3671, $6E6B06E7,
$FED41B76, $89D32BE0, $10DA7A5A, $67DD4ACC,
$F9B9DF6F, $8EBEEFF9, $17B7BE43, $60B08ED5,
$D6D6A3E8, $A1D1937E, $38D8C2C4, $4FDFF252,
$D1BB67F1, $A6BC5767, $3FB506DD, $48B2364B,
$D80D2BDA, $AF0A1B4C, $36034AF6, $41047A60,
$DF60EFC3, $A867DF55, $316E8EEF, $4669BE79,
$CB61B38C, $BC66831A, $256FD2A0, $5268E236,
$CC0C7795, $BB0B4703, $220216B9, $5505262F,
$C5BA3BBE, $B2BD0B28, $2BB45A92, $5CB36A04,
$C2D7FFA7, $B5D0CF31, $2CD99E8B, $5BDEAE1D,
$9B64C2B0, $EC63F226, $756AA39C, $026D930A,
$9C0906A9, $EB0E363F, $72076785, $05005713,
$95BF4A82, $E2B87A14, $7BB12BAE, $0CB61B38,
$92D28E9B, $E5D5BE0D, $7CDCEFB7, $0BDBDF21,
$86D3D2D4, $F1D4E242, $68DDB3F8, $1FDA836E,
$81BE16CD, $F6B9265B, $6FB077E1, $18B74777,
$88085AE6, $FF0F6A70, $66063BCA, $11010B5C,
$8F659EFF, $F862AE69, $616BFFD3, $166CCF45,
$A00AE278, $D70DD2EE, $4E048354, $3903B3C2,
$A7672661, $D06016F7, $4969474D, $3E6E77DB,
$AED16A4A, $D9D65ADC, $40DF0B66, $37D83BF0,
$A9BCAE53, $DEBB9EC5, $47B2CF7F, $30B5FFE9,
$BDBDF21C, $CABAC28A, $53B39330, $24B4A3A6,
$BAD03605, $CDD70693, $54DE5729, $23D967BF,
$B3667A2E, $C4614AB8, $5D681B02, $2A6F2B94,
$B40BBE37, $C30C8EA1, $5A05DF1B, $2D02EF8D );
implementation
type
TClosingEffectWnd = class
private
{ surface wnd }
FRedirClass: Cardinal;
FRedirWnd: HWND;
FDC: HDC;
FCache: HBITMAP;
FCacheW, FCacheH: Integer;
{ target window info }
FWnd: HWND; // target window
FOldProc: Pointer;
FAtt: Boolean; // target window has WS_EX_LAYERED style
FAttC: Cardinal; // target window's layered attribute color
FAttF: Cardinal; // target window's layered attribute flag
FAttA: Byte; // target window's layered attribute alpha
FAeroGlass: LongBool; // vista/win7 with aero theme enabled
{ states }
FFading: Boolean;
FAlphaEnd: Integer;
FAlphaStp: Integer;
FCurrAlpha: Integer;
FClosing: Boolean;
FChg: Boolean; // surface changed
FRedraw: Boolean; // redraw surface
FDigests: TList; // scan line digests
FBlend: TBlendFunction;
procedure InitWndInfos;
procedure InitRedirWnd;
procedure FinalRedirWnd;
procedure CreateRedirWnd;
procedure DestroyRedirWnd;
procedure ClosingRedirWnd;
procedure RestoringRedirWnd;
procedure HookedWndProc(var Message: TMessage);
procedure RedirWndProc(var Message: TMessage);
procedure Render;
function CheckDigests(Bits: Pointer; w, h: Integer): Boolean;
procedure AdjustFading;
procedure DoGrayScale(src, dst: Pointer; w, h: Integer);
public
constructor Create(Wnd: HWND; Time: Cardinal);
destructor Destroy; override;
procedure Closing;
procedure Restoring;
end;
{ global function implementation }
function BeginGrayscaleClosingEffect(Wnd: HWND; FadingTime: Cardinal = 1000): Cardinal;
begin
if not IsWindowVisible(Wnd) or IsIconic(Wnd) then Result := 0
else
Result := Cardinal(TClosingEffectWnd.Create(Wnd, FadingTime));
end;
procedure EndGrayscaleClosingEffect(ID: Cardinal; IsRestoring: Boolean = False);
begin
if ID <> 0 then
begin
with TClosingEffectWnd(ID) do
begin
if IsRestoring then
Restoring
else Closing;
Free;
end;
end;
end;
{ CRC32 }
function CRC32(Buf: Pointer; Cnt: Integer; Step: Integer; Seed: Cardinal): Cardinal;
var
i: Integer;
p: PByte;
begin
p := PByte(Buf);
Result := not Seed;
for i := 1 to Cnt do
begin
Result := ((Result shr 8) and $00FFFFFF) xor CRCTable[p^ xor Byte(Result)];
Inc(p, Step);
end;
Result := not Result;
end;
{ Used APIs }
function GetLayeredWindowAttributes(hwnd: HWND; var pcrKey: Cardinal; var phAlpha: Byte; var pdwFlags: Cardinal): BOOL stdcall; external 'user32.dll' name 'GetLayeredWindowAttributes';
{ DWM APIs }
type
PDWM_BLURBEHIND = ^DWM_BLURBEHIND;
DWM_BLURBEHIND = packed record
dwFlags: DWORD;
fEnable: BOOL;
hRgnBlur: HRGN;
fTransitionOnMaximized: BOOL;
end;
_DWM_BLURBEHIND = DWM_BLURBEHIND;
TDWMBlurBehind = DWM_BLURBEHIND;
PDWMBlurBehind = ^TDWMBlurBehind;
var
hDWMAPI: THandle;
_DwmIsCompositionEnabled : function (out pfEnabled: BOOL): HResult; stdcall;
_DwmGetWindowAttribute: function (hwnd: HWND; dwAttribute: DWORD;
pvAttribute: Pointer; cbAttribute: DWORD): HResult;
_DwmSetWindowAttribute: function (hwnd: HWND; dwAttribute: DWORD;
pvAttribute: Pointer; cbAttribute: DWORD): HResult; stdcall;
_DwmEnableBlurBehindWindow: function (hWnd: HWND; const pBlurBehind: TDWMBlurBehind): HResult; stdcall;
function DwmIsCompositionEnabled(out pfEnabled: BOOL): HResult;
begin
if Assigned(_DwmIsCompositionEnabled) then
Result := _DwmIsCompositionEnabled(pfEnabled)
else
begin
if hDWMAPI = 0 then
hDWMAPI := LoadLibrary('DWMAPI.DLL');
Result := E_NOTIMPL;
if hDWMAPI > 0 then
begin
_DwmIsCompositionEnabled := GetProcAddress(hDWMAPI, 'DwmIsCompositionEnabled'); // Do not localize
if Assigned(_DwmIsCompositionEnabled) then
Result := _DwmIsCompositionEnabled(pfEnabled);
end;
end;
end;
function DwmGetWindowAttribute(hwnd: HWND; dwAttribute: DWORD;
pvAttribute: Pointer; cbAttribute: DWORD): HResult;
begin
if Assigned(_DwmGetWindowAttribute) then
Result := _DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
else
begin
if hDWMAPI = 0 then
hDWMAPI := LoadLibrary('DWMAPI.DLL');
Result := E_NOTIMPL;
if hDWMAPI > 0 then
begin
_DwmGetWindowAttribute := GetProcAddress(hDWMAPI, 'DwmGetWindowAttribute'); // Do not localize
if Assigned(_DwmGetWindowAttribute) then
Result := _DwmGetWindowAttribute(hwnd, dwAttribute, pvAttribute,
cbAttribute);
end;
end;
end;
function DwmSetWindowAttribute(hwnd: HWND; dwAttribute: DWORD;
pvAttribute: Pointer; cbAttribute: DWORD): HResult;
begin
if Assigned(_DwmSetWindowAttribute) then
Result := _DwmSetWindowAttribute(hwnd, dwAttribute, pvAttribute, cbAttribute)
else
begin
if hDWMAPI = 0 then
hDWMAPI := LoadLibrary('DWMAPI.DLL');
Result := E_NOTIMPL;
if hDWMAPI > 0 then
begin
_DwmSetWindowAttribute := GetProcAddress(hDWMAPI, 'DwmSetWindowAttribute'); // Do not localize
if Assigned(_DwmSetWindowAttribute) then
Result := _DwmSetWindowAttribute(hwnd, dwAttribute, pvAttribute,
cbAttribute);
end;
end;
end;
function DwmEnableBlurBehindWindow(hWnd: HWND; const pBlurBehind: TDWMBlurBehind): HResult;
begin
if Assigned(_DwmEnableBlurBehindWindow) then
Result := _DwmEnableBlurBehindWindow(hWnd, pBlurBehind)
else
begin
if hDWMAPI = 0 then
hDWMAPI := LoadLibrary('DWMAPI.DLL');
Result := E_NOTIMPL;
if hDWMAPI > 0 then
begin
_DwmEnableBlurBehindWindow := GetProcAddress(hDWMAPI, 'DwmEnableBlurBehindWindow'); // Do not localize
if Assigned(_DwmEnableBlurBehindWindow) then
Result := _DwmEnableBlurBehindWindow(hWnd, pBlurBehind);
end;
end;
end;
{ TClosingEffectWnd }
const
ShowingFlags: array [Boolean] of Cardinal = (
SWP_NOSIZE or SWP_NOMOVE or SWP_NOZORDER or SWP_NOACTIVATE or SWP_HIDEWINDOW,
SWP_NOSIZE or SWP_NOMOVE or SWP_NOZORDER or SWP_NOACTIVATE or SWP_SHOWWINDOW
);
constructor TClosingEffectWnd.Create(Wnd: HWND; Time: Cardinal);
var
n: Integer;
label
NoFade;
begin
FDigests := TList.Create;
FWnd := Wnd;
InitWndInfos;
FBlend.BlendOp := AC_SRC_OVER;
FBlend.BlendFlags := 0;
FBlend.AlphaFormat := AC_SRC_ALPHA;
FCurrAlpha := FAttA;
FAlphaEnd := 1;
n := Time div REDIR_CHECK_INTERVAL;
if n = 0 then
begin
FAlphaStp := 0;
end
else begin
FAlphaStp := (FAlphaEnd - FCurrAlpha) div n;
if FAlphaStp = 0 then FAlphaStp := -1;
end;
FBlend.SourceConstantAlpha := FAttA;
FFading := True;
InitRedirWnd;
end;
destructor TClosingEffectWnd.Destroy;
begin
FinalRedirWnd;
if FCache <> 0 then
DeleteObject(FCache);
if FDC <> 0 then
DeleteDC(FDC);
FDigests.Free;
inherited;
end;
procedure TClosingEffectWnd.InitWndInfos;
begin
FAtt := GetWindowLong(FWnd, GWL_EXSTYLE) and WS_EX_LAYERED <> 0;
if FAtt then
GetLayeredWindowAttributes(FWnd, FAttC, FAttA, FAttF)
else
FAttF := 0;
if FAttF and LWA_ALPHA = 0 then
FAttA := 255;
{ checking Vista/win7 Aero }
FAeroGlass := Win32MajorVersion >= 6;
if FAeroGlass then
begin
FAeroGlass := (DwmIsCompositionEnabled(FAeroGlass) = S_OK) and FAeroGlass;
if FAeroGlass then
FAeroGlass := (DwmGetWindowAttribute(FWnd, 1, @FAeroGlass, sizeof(FAeroGlass)) = S_OK) and FAeroGlass;
end;
end;
procedure TClosingEffectWnd.InitRedirWnd;
begin
FOldProc := Pointer(SetWindowLong(FWnd, GWL_WNDPROC, Integer(MakeObjectInstance(HookedWndProc))));
SendMessage(FWnd, WM_REDIRCREATE, 0, 0);
end;
procedure TClosingEffectWnd.FinalRedirWnd;
begin
if FRedirWnd <> 0 then
SendMessage(FWnd, WM_REDIRDESTROY, 0, 0);
FreeObjectInstance(Pointer(SetWindowLong(FWnd, GWL_WNDPROC, Integer(FOldProc))));
end;
procedure TClosingEffectWnd.CreateRedirWnd;
const
nameChars: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789';
var
wndClass: TWndClass;
style, exstyle: Cardinal;
rgn: HRGN;
r, r2: TRect;
name: array [0..80] of Char;
bkatt: Integer;
function RandomName: PAnsiChar;
var
i: Integer;
begin
for i := 0 to 7 do
name[i] := nameChars[Random(Length(nameChars))+1];
name[8] := #0;
Result := name;
end;
begin
ZeroMemory(@wndClass, sizeof(wndClass));
style := GetWindowLong(FWnd, GWL_STYLE);
exstyle := GetWindowLong(FWnd, GWL_EXSTYLE);
SetWindowLong(FWnd, GWL_EXSTYLE, exstyle or WS_EX_LAYERED);
GetWindowRect(FWnd, r);
rgn := CreateRectRgn(0,0,1,1);
case GetWindowRgn(FWnd, rgn) of
SIMPLEREGION:
begin
GetRgnBox(rgn, r2);
OffsetRect(r2, r.Left, r.Top);
if EqualRect(r, r2) then
begin
DeleteObject(rgn);
rgn := 0;
end;
end;
NULLREGION, ERROR:
begin
DeleteObject(rgn);
rgn := 0;
end;
end;
with WndClass do
begin
Style := GetClassLong(FWnd, GCL_STYLE);
lpfnWndProc := @DefWindowProc;
hInstance := SysInit.HInstance;
hIcon := GetClassLong(FWnd, GCL_HICON);
hCursor := GetClassLong(FWnd, GCL_HCURSOR);
hbrBackground := GetStockObject(BLACK_BRUSH);
repeat
lpszClassName := RandomName;
FRedirClass := Windows.RegisterClass(WndClass);
until FRedirClass <> 0;
end;
GetWindowText(FWnd, name, 80);
exstyle := exstyle and not WS_EX_APPWINDOW;
exstyle := exstyle or WS_EX_LAYERED OR WS_EX_NOACTIVATE;
FRedirWnd := CreateWindowEx(exstyle, PAnsiChar(FRedirClass),
name, style and not WS_VISIBLE, r.Left, r.Top, r.Right - r.Left, r.Bottom - r.Top, 0, 0, HInstance, nil);
SetWindowLong(FRedirWnd, GWL_WNDPROC, Integer(MakeObjectInstance(RedirWndProc)));
if rgn <> 0 then
SetWindowRgn(FRedirWnd, rgn, True);
SetWindowPos(FRedirWnd, FWnd, r.Left, r.Top, r.Right - r.Left, r.Bottom - r.Top, SWP_NOACTIVATE);
if FAeroGlass then
begin
// since we have no way to copy Aero-glass border image, we have to turn aero-glass off
bkatt := 1; // disabled
DwmSetWindowAttribute(FWnd, 2, @bkatt, sizeof(bkatt));
end;
//SetWindowPos(FRedirWnd, 0, 0, 0, 0, 0, ShowFlags[True]);
SetTimer(FRedirWnd, 1, REDIR_CHECK_INTERVAL, nil);
end;
procedure TClosingEffectWnd.DestroyRedirWnd;
var
bkatt: Integer;
begin
KillTimer(FRedirWnd, 1);
FreeObjectInstance(Pointer(SetWindowLong(FRedirWnd, GWL_WNDPROC, Integer(@DefWindowProc))));
DestroyWindow(FRedirWnd);
FRedirWnd := 0;
Windows.UnregisterClass(PAnsiChar(FRedirClass), HInstance);
FRedirClass := 0;
if FClosing then
ShowWindow(FWnd, SW_HIDE);
if FAtt then
SetLayeredWindowAttributes(FWnd, FAttC, FAttA, FAttF)
else
SetWindowLong(FWnd, GWL_EXSTYLE, GetWindowLong(FWnd, GWL_EXSTYLE) and not WS_EX_LAYERED);
if FAeroGlass then
begin
bkatt := 2; // enabled
DwmSetWindowAttribute(FWnd, 2, @bkatt, sizeof(bkatt));
end;
end;
procedure TClosingEffectWnd.Closing;
begin
SendMessage(FWnd, WM_REDIRCLOSING, 1, 0);
end;
procedure TClosingEffectWnd.Restoring;
begin
SendMessage(FWnd, WM_REDIRCLOSING, 0, 0);
end;
procedure TClosingEffectWnd.ClosingRedirWnd;
var
Msg: TMsg;
begin
FFading := True;
FClosing := True;
FAlphaEnd := 1;
while FFading do
begin
while PeekMessage(Msg, 0, 0, 0, PM_REMOVE) do
begin
if Msg.message = WM_QUIT then Exit;
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
if FFading then
WaitMessage;
end;
DestroyRedirWnd;
end;
procedure TClosingEffectWnd.RestoringRedirWnd;
var
Msg: TMsg;
begin
FFading := True;
FClosing := False;
FAlphaEnd := FAttA;
FAlphaStp := -FAlphaStp;
while FFading do
begin
while PeekMessage(Msg, 0, 0, 0, PM_REMOVE) do
begin
if Msg.message = WM_QUIT then Exit;
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
if FFading then
WaitMessage;
end;
DestroyRedirWnd;
end;
procedure TClosingEffectWnd.RedirWndProc(var Message: TMessage);
begin
with Message do
begin
if Msg = WM_TIMER then
Render;
Result := DefWindowProc(FRedirWnd, Msg, WParam, LParam);
end;
end;
procedure TClosingEffectWnd.HookedWndProc(var Message: TMessage);
begin
with Message do
begin
Result := 0;
case Msg of
WM_REDIRCREATE:
begin
CreateRedirWnd;
Exit;
end;
WM_REDIRDESTROY:
begin
DestroyRedirWnd;
Exit;
end;
WM_REDIRCLOSING:
begin
if WParam = 0 then
RestoringRedirWnd
else
ClosingRedirWnd;
Exit;
end;
end;
Result := CallWindowProc(FOldProc, FWnd, Msg, WParam, Lparam);
end;
end;
procedure TClosingEffectWnd.Render;
var
hdr: TBitmapInfo;
dc, mdc: HDC;
bm: HBITMAP;
bits, bits2: Pointer;
r, r2: TRect;
pt: TPoint;
sz: TSize;
rgn: HRGN;
begin
KillTimer(FRedirWnd, 1);
HideCaret(0);
GetWindowRect(FWnd, r);
GetWindowRect(FRedirWnd, r2);
sz.cx := r.Right - r.Left;
sz.cy := r.Bottom - r.Top;
if not EqualRect(r, r2) or (sz.cx <> FCacheW) or (sz.cy <> FCacheH) then
begin // moved or resized
if (sz.cx <> FCacheW) or (sz.cy <> FCacheH) then // resized
begin
// rebuild form region
rgn := CreateRectRgn(0, 0, 1, 1);
case GetWindowRgn(FWnd, rgn) of
SIMPLEREGION:
begin
GetRgnBox(rgn, r2);
OffsetRect(r2, r.Left, r.Top);
if EqualRect(r, r2) then
begin
DeleteObject(rgn);
rgn := 0;
end;
end;
NULLREGION, ERROR:
begin
DeleteObject(rgn);
rgn := 0;
end;
end;
if rgn <> 0 then
SetWindowRgn(FRedirWnd, rgn, False);
FChg := True;
end;
SetWindowPos(FRedirWnd, FWnd, r.Left, r.Top, sz.cx, sz.cy, SWP_NOACTIVATE);
end;
// create DIB
ZeroMemory(@hdr, sizeof(hdr));
with hdr.bmiHeader do
begin
biSize := SizeOf(TBitmapInfoHeader);
biWidth := sz.cx;
biHeight := sz.cy;
biPlanes := 1;
biBitCount := 24;
biCompression := BI_RGB;
end;
bm := CreateDIBSection(0, hdr, DIB_RGB_COLORS, bits, 0, 0);
mdc := CreateCompatibleDC(0);
DeleteObject(SelectObject(mdc, bm));
// copy window surface image
dc := GetWindowDC(FWnd);
BitBlt(mdc, 0, 0, sz.cx, sz.cy, dc, 0, 0, SRCCOPY);
ReleaseDC(FWnd, dc);
// check if changed
if CheckDigests(bits, sz.cx, sz.cy) then
FChg := True;
if FChg then // rebuild surface
begin
FChg := False;
if FCache <> 0 then
DeleteObject(FCache);
with hdr.bmiHeader do
biBitCount := 32;
FCache := CreateDIBSection(0, hdr, DIB_RGB_COLORS, bits2, 0, 0);
if FDC <> 0 then
SelectObject(FDC, FCache)
else begin
FDC := CreateCompatibleDC(0);
DeleteObject(SelectObject(FDC, FCache));
end;
DoGrayScale(bits, bits2, sz.cx, sz.cy);
FRedraw := True;
end;
AdjustFading;
if FRedraw then // update layered window
begin
pt := Point(0, 0);
UpdateLayeredWindow(FRedirWnd, 0, nil, @sz, FDC, @pt, 0, @FBlend, ULW_ALPHA);
SetWindowPos(FRedirWnd, FWnd, r.Left, r.Top, sz.cx, sz.cy, SWP_NOACTIVATE);
{if FAeroGlass then
begin
blur.dwFlags := 7;
blur.fEnable := True;
blur.hRgnBlur := 0;
blur.fTransitionOnMaximized := True;
DwmEnableBlurBehindWindow(FRedirWnd, blur);
end;
}
FRedraw := False;
end;
DeleteObject(bm);
DeleteDC(mdc);
ShowCaret(0);
if IsWindowVisible(FWnd) <> IsWindowVisible(FRedirWnd) then
SetWindowPos(FRedirWnd, 0, 0, 0, 0, 0, ShowingFlags[IsWindowVisible(FWnd)]);
SetTimer(FRedirWnd, 1, REDIR_CHECK_INTERVAL, nil);
end;
function TClosingEffectWnd.CheckDigests(Bits: Pointer; w, h: Integer): Boolean;
var
cnt: Integer;
n, p, ln, stp, y: Integer;
v: Cardinal;
begin
Result := False;
cnt := h div REDIR_CHECK_STEP;
FDigests.Count := cnt;
ln := BytesPerScanLine(w, 24, 32);
stp := ln * REDIR_CHECK_STEP;
y := REDIR_CHECK_STEP;
n := 0;
p := Integer(Bits) + (h-y-1)*ln;
while y < h do
begin
v := CRC32(Pointer(p), ln, 1, 0);
if v <> Cardinal(FDigests.Items[n]) then
begin
FDigests.Items[n] := Pointer(v);
Result := True;
end;
Inc(n);
Inc(y, REDIR_CHECK_STEP);
Dec(p, stp);
end;
end;
procedure TClosingEffectWnd.DoGrayScale(src, dst: Pointer; w, h: Integer);
var
x, y, dln, sln, dpx, spx, dw, sw: Integer;
f: Boolean;
t: Cardinal;
v: Byte;
begin
dw := BytesPerScanLine(w, 32, 32);
sw := BytesPerScanLine(w, 24, 32);
dln := Integer(dst);
sln := Integer(src);
f := FAtt and (FAttF and LWA_COLORKEY <> 0);
t := FAttC and $FFFFFF;
for y := 1 to h do
begin
dpx := dln;
spx := sln;
for x := 1 to w do
begin
if f and (t = (PCardinal(spx)^ and $FFFFFF)) then
PInteger(dpx)^ := 0
else begin
v := (GrayColorTable[0, PByte(spx)^] + GrayColorTable[1, PByte(spx+1)^] + GrayColorTable[2, PByte(spx+2)^]) shr 16;
PByte(dpx)^ := v;
PByte(dpx+1)^ := v;
PByte(dpx+2)^ := v;
PByte(dpx+3)^ := $FF;
end;
Inc(dpx, 4);
Inc(spx, 3);
end;
Inc(dln, dw);
Inc(sln, sw);
end;
end;
procedure TClosingEffectWnd.AdjustFading;
var
s: Cardinal;
a: Byte;
begin
if FFading then
begin
if FCurrAlpha = FAlphaEnd then
begin
if not FClosing then
begin
FFading := False;
Exit;
end;
end
else begin
if ((FAlphaStp < 0) and (FCurrAlpha + FAlphaStp > FAlphaEnd)) or
((FAlphaStp > 0) and (FCurrAlpha + FAlphaStp < FAlphaEnd)) then
Inc(FCurrAlpha, FAlphaStp)
else
FCurrAlpha := FAlphaEnd;
SetLayeredWindowAttributes(FWnd, FAttC, FCurrAlpha, FAttF or LWA_ALPHA);
//UpdateWindow(FWnd);
end;
if FClosing then
begin
FRedraw := True;
if (FAlphaStp < 0) and (Integer(FBlend.SourceConstantAlpha) + FAlphaStp > 0) then
Inc(FBlend.SourceConstantAlpha, FAlphaStp)
else begin
FBlend.SourceConstantAlpha := 0;
FFading := False;
end;
end;
end;
end;
var
I, J: Integer;
initialization
for I := 0 to 255 do
for J := 0 to 255 do
AlphaColorTable[I, J] := I * J div 255;
for I := 0 to 255 do
begin
GrayColorTable[0, I] := I * 9437; // 0.14
GrayColorTable[1, I] := I * 36503; // 0.56
GrayColorTable[2, I] := I * 19595; // 0.30
end;
end.
只需要调用
function BeginGrayscaleClosingEffect(Wnd: HWND; FadingTime: Cardinal = 1000): Cardinal;
procedure EndGrayscaleClosingEffect(ID: Cardinal; IsRestoring: Boolean = False);
这两个函数.