Flip vertically an Android Canvas

Question

Is there an easy way to flip a canvas in Android? I cant seem to find anything that allows me to flip it vertically so that zero on the y-axis is the bottom of the phone screen

Answer 1

If you are drawing a bitmap, you can also use the Shader.TileMode of MIRROR, e.g.

val shader = BitmapShader(bitmap, Shader.TileMode.MIRROR, Shader.TileMode.MIRROR)
paint.shader = shader
canvas.drawRoundRect(roundRect, 20F, 20F, mPaint)
paint.shader = null

Answer 2

Try

canvas.scale(1f, -1f, width / 2f, height / 2f)

See Canvas.scale documentation. The first two parameters are the amount to scale by.