大家何苦呐?老是要排大队。。
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unit Bmp-Disaper;?
interface?
uses SysUtils,WinTypes,WinProcs,Messages,Classes,Graphics,Controls,Forms,
Dialogs,ExtCtrls,StdCtrls;?
type?
TForm1=class(TForm)?
Image1:TImage;{显示渐隐图像}?
Timer1:TTimer;{时钟构件}?
Panel1:TPanel;{显示渐隐过程,已渐隐为背景色的颜色数}?
Button1:TButton;{开始渐隐按钮}?
procedure Timer1 Timer(Sender:TObject);{始终控制过程}?
procedure Button1 Click (Sender:TObject);{激发渐隐过程}?
procedure FormCreate (Sender:TObject);{窗体构造过程}?
private?
PalDevice:Imteger;{调色板模式标志}?
go:integer;{渐隐开始标志}?
pal:arrar[0...255] of TPaletteEntry;{逻辑调色板}?
end;??
var?
Form1:TForm1;
implementation?
{$R *.DFM}??
procedure TForm1.Timer1Timer(Sender:TObject);?
var i,n:integer;?
begin?
if go=1 then{开始渐隐} begin?
for i:=0 to 255 do{调色板颜色值递减} begin?
pal[i].peFlags:=PC?-RESERVED;{调色板动画标志,一定得这样设置}?
if pal[i].peRed>0 then
pal[i].peRed:=pal[i].peRed-1;?
if pal[i].peGreen>0 then
pal[i].peGreen:=pal[i].peGreen-1;?
if pal[i].peBlue>0 then
pal[i].peBlue:=pal[i].peBlue-1;〖ZK)〗?
end;??
SetPaletteEntries(Image1.Picture.Bitmap.Palette,0,256,pal);{设置新的颜色
到DIB调色板}?
RealizePalette(Image1.Picture.Bitmap.Canvas.Handle);{影射逻辑调色板到系
统硬件调色板}?
{计算已经渐隐消失的颜色数,如全数完成则终止渐隐过程,令go=0}?
n:=0;?
for i:=0 to 255 do
if(pal[i].peRed=0) and (pal[i].peGreen=0) and (pal[i].peBlue=0) then
n:=n+1;
if n=256 then begin
Panel1.Caption:='OK';?
go:=0;
end else
Panel1.Caption:='n='+IntToStr
;?
end;?
end;
procedure TForm1.Button1Click(Sender:TObject);?
begin?
GetPaletteEntries(Image1.Pictrue.Bitmap.Palette,0,256,pal);{获得DIB图像的调
色板}?
{判断系统是否是基于调色板的显示模式,如果是则开始渐隐过程}
PalDevice:=GetDeviceCaps(Canvas.Handle,RASTERCAPS) and RC?-PALETTE;?
if(PalDevice>0) the go:=1;?
end;?
procedure TForm1.FormCreate(Sender:TObject);?
begin?
Image1.Pictrue.Bitmap.LoadFromFile('c:\video10\ts.bmp');{加载DIB图像}?
end;?
end.