139 lines
4.6 KiB
Kotlin
139 lines
4.6 KiB
Kotlin
/*
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* Copyright (C) 2019 Electric Coin Company
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*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* This file has been modified by Electric Coin Company to translate it into Kotlin and add support for Firebase vision.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.android.cameraview
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import cash.z.android.qrecycler.R
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import android.annotation.TargetApi
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import android.content.Context
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import android.graphics.Matrix
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import android.graphics.SurfaceTexture
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import android.view.Surface
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import android.view.TextureView
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import android.view.View
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import android.view.ViewGroup
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import cash.z.android.cameraview.base.PreviewImpl
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@TargetApi(14)
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internal class TextureViewPreview(context: Context, parent: ViewGroup) : PreviewImpl() {
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private val mTextureView: TextureView
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private var mDisplayOrientation: Int = 0
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override val surface: Surface
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get() = Surface(mTextureView.surfaceTexture)
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override val surfaceTexture: SurfaceTexture
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get() = mTextureView.surfaceTexture
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override val view: View
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get() = mTextureView
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override val outputClass: Class<*>
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get() = SurfaceTexture::class.java
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override val isReady: Boolean
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get() = mTextureView.surfaceTexture != null
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init {
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val view = View.inflate(context, R.layout.texture_view, parent)
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mTextureView = view.findViewById(R.id.texture_view) as TextureView
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mTextureView.surfaceTextureListener = object : TextureView.SurfaceTextureListener {
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override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
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setSize(width, height)
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configureTransform()
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dispatchSurfaceChanged()
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}
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override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
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setSize(width, height)
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configureTransform()
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dispatchSurfaceChanged()
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}
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override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
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setSize(0, 0)
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return true
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}
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override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {}
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}
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}
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// This method is called only from Camera2.
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@TargetApi(15)
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override fun setBufferSize(width: Int, height: Int) {
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mTextureView.surfaceTexture.setDefaultBufferSize(width, height)
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}
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override fun setDisplayOrientation(displayOrientation: Int) {
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mDisplayOrientation = displayOrientation
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configureTransform()
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}
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/**
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* Configures the transform matrix for TextureView based on [.mDisplayOrientation] and
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* the surface size.
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*/
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fun configureTransform() {
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val matrix = Matrix()
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if (mDisplayOrientation % 180 == 90) {
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val width = width.toFloat()
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val height = height.toFloat()
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// Rotate the camera preview when the screen is landscape.
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matrix.setPolyToPoly(
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floatArrayOf(
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0f, 0f, // top left
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width, 0f, // top right
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0f, height, // bottom left
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width, height
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)// bottom right
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, 0,
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if (mDisplayOrientation == 90)
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// Clockwise
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floatArrayOf(
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0f, height, // top left
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0f, 0f, // top right
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width, height, // bottom left
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width, 0f
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)// bottom right
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else
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// mDisplayOrientation == 270
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// Counter-clockwise
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floatArrayOf(
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width, 0f, // top left
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width, height, // top right
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0f, 0f, // bottom left
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0f, height
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)// bottom right
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, 0,
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4
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)
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} else if (mDisplayOrientation == 180) {
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matrix.postRotate(180f, width / 2f, height / 2f)
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}
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mTextureView.setTransform(matrix)
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}
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}
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