我试图通过将.jpg转换为bmp然后将其保存到imagelist1来将jpg加载到图像列表中。
从代码剪辑的顶部到底部。 Selectdir工作和文件存在部件工作。这用于加载文件夹中的所有图像。所有图像都被命名为如此0.jpg / 1.jpg等。
然后我将jpg加载到tpicture。设置bmp宽度/高度并使用与jpg相同的图像加载bmp,然后将bmp添加到图像列表。当它完成它应该显示第一个图像0.jpg
两个问题,首先,如果我这样做,它只会显示bmp的一个小区域(左上角) 但这是正确的形象。我认为这是由于选项裁剪。我似乎无法弄清楚如何让它在运行时选择中心?
第二,如果我把
Imagelist1.width := currentimage.width;
Imagelist1.height := currentimage.height;
然后显示最后一张图片。像Imagelist1.GetBitmap()
一样不起作用?
所以我假设任何一个的修复都会很棒!
干杯
虾蛄
procedure TForm1.Load1Click(Sender: TObject);
var
openDialog : TOpenDialog;
dir :string;
MyPicture :TPicture;
currentimage :Tbitmap;
image : integer;
clTrans : TColor;
begin
Image := 0 ;
//lets user select a dir
SelectDirectory(Dir, [sdAllowCreate, sdPerformCreate, sdPrompt],SELDIRHELP);
myPicture :=Tpicture.Create;
currentimage := TBitmap.Create;
//keeps adding images as long as the file path exsist.
//thus comic pages should be renumbed to 0-XX
while FileExists(Dir+'\'+inttostr(image)+'.jpg') do
begin
try
MyPicture.LoadFromFile(Dir+'\'+inttostr(image)+'.jpg'); //load image to jpg holder
currentimage.Width := mypicture.Width; //set width same as jpg
currentimage.Height:= mypicture.Height; //set height same as jpg
currentimage.Canvas.Draw(0, 0, myPicture.Graphic); //draw jpg on bmp
clTrans:=currentimage.TransparentColor; //unknown if needed?
//Imagelist1.Width := currentimage.Width;
//imagelist1.Height := currentimage.Height;
Imagelist1.Addmasked(Currentimage,clTrans); //add to imagelist
finally
image := image +1; //add one so it adds next page
end;
end;
ImageList1.GetBitmap(0,zImage1.Bitmap);
mypicture.Free;
currentimage.Free;
end;
答案 0 :(得分:3)
每次使用TImage
都会增加许多不必要的开销。
尝试这样的事情(未经测试,因为我没有一个文件夹,这个图像以这种方式命名 - 它编译,但是< g>)。当然,如果当前没有Jpeg
子句,则需要将uses
添加到其中。
procedure TForm2.Button1Click(Sender: TObject);
var
DirName: string;
begin
DirName := 'D:\Images';
if SelectDirectory('Select Image Path',
'D:\TempFiles',
DirName,
[sdNewUI],
Self) then
LoadImages(DirName);
end;
procedure TForm2.LoadImages(const Dir: string);
var
i: Integer;
CurFileName: string;
JpgIn: TJPEGImage;
BmpOut: TBitmap;
begin
i := 1;
while True do
begin
CurFileName := Format('%s%d.jpg',
[IncludeTrailingPathDelimiter(Dir), i]);
if not FileExists(CurFileName) then
Break;
JpgIn := TJPEGImage.Create;
try
JpgIn.LoadFromFile(CurFileName);
// If you haven't initialized your ImageList width and height, it
// defaults to 16 x 16; we can set it here, if all the images are
// the same dimensions.
if (ImageList1.Count = 0) then
ImageList1.SetSize(JpgIn.Width, JpgIn.Height);
BmpOut := TBitmap.Create;
try
BmpOut.Assign(JpgIn);
ImageList1.Add(BmpOut, nil);
finally
BmpOut.Free;
end;
finally
JpgIn.Free;
end;
Inc(i);
end;
if ImageList1.Count > 0 then
begin
BmpOut := TBitmap.Create;
try
ImageList1.GetBitmap(0, BmpOut);
Image1.Picture.Assign(BmpOut);
finally
BmpOut.Free;
end;
end;
end;