c++gdi如何让图片透明
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GDI+中这个重载函数可以实现
Graphics.DrawImage ( _
image As Image, _
destRect As Rectangle, _
srcX As Integer, _
srcY As Integer, _
srcWidth As Integer, _
srcHeight As Integer, _
srcUnit As GraphicsUnit, _
imageAttr As ImageAttributes _
)
ImageAttributes有个成员方法.SetColorKey (Color, Color) ,可以设置透明色范围.如果你要做渐变透明也可以修改其他属性.比如使用颜色替换,背景色替换成半透明色
Graphics.DrawImage ( _
image As Image, _
destRect As Rectangle, _
srcX As Integer, _
srcY As Integer, _
srcWidth As Integer, _
srcHeight As Integer, _
srcUnit As GraphicsUnit, _
imageAttr As ImageAttributes _
)
ImageAttributes有个成员方法.SetColorKey (Color, Color) ,可以设置透明色范围.如果你要做渐变透明也可以修改其他属性.比如使用颜色替换,背景色替换成半透明色
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