在vb中如何旋转图片？

来源：百度知道 编辑：UC知道 时间：2024/06/21 18:47:01
一个picturebox读入一张jpg图，如何在这个picturebox中实现jpg图90度和180度旋转？

逆时针旋转90度
Dim p()
ScaleMode = 3
Picture1.AutoRedraw = True
Picture1.ScaleMode = 3
w = Picture1.ScaleWidth
h = Picture1.ScaleHeight
ReDim p(w - 1, h - 1)
For i = 0 To w - 1
For j = 0 To h - 1
p(i, j) = Picture1.Point(i, j)
Next j
Next i
Picture1.Width = h + 4 * Picture1.BorderStyle
Picture1.Height = w + 4 * Picture1.BorderStyle
For i = 0 To h - 1
For j = 0 To w - 1
Picture1.PSet (i, w - j - 1), p(j, i)
Next j
Next i
顺时针旋转90度把Picture1.PSet (i, w - j - 1), p(j, i)
改为Picture1.PSet (h - i - 1, j), p(j, i)
旋转180度把最后七行改为
For i = 0 To w - 1
For j = 0 To h - 1
Picture1.PSet (i, j), p(w - i - 1, h - j - 1)
Next j
Next i