ICO (Dinh dang Bieu tuong Windows)
ICO la dinh dang chua duoc su dung cho cac bieu tuong tren Microsoft Windows va favicon trang web. Mot tep ICO duy nhat co the chua nhieu hinh anh o cac kich thuoc va do sau mau khac nhau. No van la dinh dang tieu chuan cho bieu tuong tab trinh duyet (favicon) cung voi PNG.
Loại MIME
image/vnd.microsoft.icon
Loại
Nhị phân
Nén
Không mất dữ liệu
Ưu điểm
- + Multiple sizes in a single file
- + Universal favicon support across browsers
- + Transparent background support
Nhược điểm
- − Limited to icon use cases
- − Maximum practical size of 256x256 pixels
- − Windows-centric format
Khi nào nên dùng .ICO
Su dung ICO cho bieu tuong ung dung Windows va favicon trang web. Bao gom nhieu kich thuoc (16x16, 32x32, 48x48) trong mot tep duy nhat de hien thi tot nhat.
Chi tiết kỹ thuật
Cac tep ICO chua thu muc cac hinh anh BMP hoac PNG o cac kich thuoc khac nhau (16x16, 32x32, 48x48, 256x256). Cac tep ICO hien dai thuong nhung hinh anh nen PNG cho cac kich thuoc tren 48x48.
Lịch sử
ICO duoc gioi thieu cung voi Windows 1.0 vao nam 1985 cho cac bieu tuong ung dung may tinh de ban. No tro thanh tieu chuan favicon web khi Internet Explorer 5 ho tro favicon.ico vao nam 1999.
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