GDI+ 学习记录(28) 图像颜色的数据格式 - PixelFormat

//指定位图颜色
var
g,gbit:TGPGraphics;
bit1,bit2:TGPBitmap;
sb:TGPSolidBrush;
begin
g:=TGPGraphics.Create(Canvas.Handle);
g.Clear(aclWhite);
sb:=TGPSolidBrush.Create(aclBlue);{画刷为蓝色}

bit1:=TGPBitmap.Create(200,32,PixelFormat32bppARGB);{指定为 32 位颜色}
bit2:=TGPBitmap.Create(200,32,PixelFormat1bppIndexed);{只有两种颜色}

gbit:=TGPGraphics.Create(bit1);
gbit.FillRectangle(sb,0,0,200,32);
g.DrawImage(bit1,11,11,bit1.GetWidth,bit1.GetHeight);{画出来是蓝色}

gbit:=TGPGraphics.Create(bit2);
gbit.FillRectangle(sb,0,0,200,32);
g.DrawImage(bit2,11,100,bit2.GetWidth,bit2.GetHeight);{画出来是黑色, 它只有黑白两色}

sb.Free;
bit1.Free;
bit2.Free;
gbit.Free;
g.Free;
end;