1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
package org.yuzu.yuzu_emu.views
import android.content.Context
import android.util.AttributeSet
import android.util.Rational
import android.view.SurfaceView
import kotlin.math.roundToInt
class FixedRatioSurfaceView @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : SurfaceView(context, attrs, defStyleAttr) {
private var aspectRatio: Float = 0f // (width / height), 0f is a special value for stretch
/**
* Sets the desired aspect ratio for this view
* @param ratio the ratio to force the view to, or null to stretch to fit
*/
fun setAspectRatio(ratio: Rational?) {
aspectRatio = ratio?.toFloat() ?: 0f
}
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec)
val width = MeasureSpec.getSize(widthMeasureSpec)
val height = MeasureSpec.getSize(heightMeasureSpec)
if (aspectRatio != 0f) {
val newWidth: Int
val newHeight: Int
if (height * aspectRatio < width) {
newWidth = (height * aspectRatio).roundToInt()
newHeight = height
} else {
newWidth = width
newHeight = (width / aspectRatio).roundToInt()
}
val left = (width - newWidth) / 2;
val top = (height - newHeight) / 2;
setLeftTopRightBottom(left, top, left + newWidth, top + newHeight)
} else {
setLeftTopRightBottom(0, 0, width, height)
}
}
}
|
