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| 1 | +@file:Suppress("DEPRECATION") |
| 2 | + |
| 3 | +package com.smarttoolfactory.tutorial1_1basics.chapter6_graphics |
| 4 | + |
| 5 | +import android.content.Context |
| 6 | +import android.graphics.Bitmap |
| 7 | +import android.renderscript.Allocation |
| 8 | +import android.renderscript.Element |
| 9 | +import android.renderscript.RenderScript |
| 10 | +import android.renderscript.ScriptIntrinsicBlur |
| 11 | +import androidx.compose.foundation.Image |
| 12 | +import androidx.compose.foundation.layout.Column |
| 13 | +import androidx.compose.foundation.layout.aspectRatio |
| 14 | +import androidx.compose.foundation.layout.fillMaxSize |
| 15 | +import androidx.compose.foundation.layout.fillMaxWidth |
| 16 | +import androidx.compose.foundation.layout.padding |
| 17 | +import androidx.compose.foundation.rememberScrollState |
| 18 | +import androidx.compose.foundation.verticalScroll |
| 19 | +import androidx.compose.material3.Slider |
| 20 | +import androidx.compose.material3.Text |
| 21 | +import androidx.compose.runtime.Composable |
| 22 | +import androidx.compose.runtime.getValue |
| 23 | +import androidx.compose.runtime.mutableFloatStateOf |
| 24 | +import androidx.compose.runtime.mutableStateOf |
| 25 | +import androidx.compose.runtime.remember |
| 26 | +import androidx.compose.runtime.setValue |
| 27 | +import androidx.compose.ui.Modifier |
| 28 | +import androidx.compose.ui.graphics.ImageBitmap |
| 29 | +import androidx.compose.ui.graphics.asAndroidBitmap |
| 30 | +import androidx.compose.ui.graphics.asImageBitmap |
| 31 | +import androidx.compose.ui.layout.ContentScale |
| 32 | +import androidx.compose.ui.platform.LocalContext |
| 33 | +import androidx.compose.ui.res.imageResource |
| 34 | +import androidx.compose.ui.tooling.preview.Preview |
| 35 | +import androidx.compose.ui.unit.dp |
| 36 | +import com.smarttoolfactory.tutorial1_1basics.R |
| 37 | +import com.smarttoolfactory.tutorial1_1basics.ui.components.StyleableTutorialText |
| 38 | +import com.smarttoolfactory.tutorial1_1basics.ui.components.TutorialHeader |
| 39 | +import com.smarttoolfactory.tutorial1_1basics.ui.components.TutorialText2 |
| 40 | +import kotlin.math.roundToInt |
| 41 | + |
| 42 | + |
| 43 | +@Preview |
| 44 | +@Composable |
| 45 | +fun Tutorial6_40Screen1() { |
| 46 | + TutorialContent() |
| 47 | +} |
| 48 | + |
| 49 | + |
| 50 | +@Composable |
| 51 | +private fun TutorialContent() { |
| 52 | + Column(modifier = Modifier.padding(8.dp)) { |
| 53 | + TutorialHeader(text = "RenderScript") |
| 54 | + StyleableTutorialText( |
| 55 | + text = "Blue Bitmap using **RenderScript**", |
| 56 | + bullets = false |
| 57 | + ) |
| 58 | + RenderScriptBlursample() |
| 59 | + } |
| 60 | +} |
| 61 | + |
| 62 | +@Preview |
| 63 | +@Composable |
| 64 | +private fun RenderScriptBlursample() { |
| 65 | + |
| 66 | + Column( |
| 67 | + modifier = Modifier.fillMaxSize().verticalScroll(rememberScrollState()) |
| 68 | + ) { |
| 69 | + |
| 70 | + val imageBitmap = ImageBitmap.imageResource(R.drawable.landscape10) |
| 71 | + |
| 72 | + var blurRadius by remember { |
| 73 | + mutableFloatStateOf(10f) |
| 74 | + } |
| 75 | + |
| 76 | + val context = LocalContext.current |
| 77 | + |
| 78 | + val blurredBitmap by remember(imageBitmap, blurRadius) { |
| 79 | + mutableStateOf(blurBitmap(context, imageBitmap.asAndroidBitmap(), blurRadius)) |
| 80 | + } |
| 81 | + |
| 82 | + TutorialText2(text = "Default") |
| 83 | + |
| 84 | + Image( |
| 85 | + modifier = Modifier.fillMaxWidth().aspectRatio(3 / 2f), |
| 86 | + bitmap = imageBitmap, |
| 87 | + contentDescription = null, |
| 88 | + contentScale = ContentScale.FillBounds |
| 89 | + ) |
| 90 | + |
| 91 | + |
| 92 | + TutorialText2(text = "Blurred") |
| 93 | + Image( |
| 94 | + modifier = Modifier.fillMaxWidth().aspectRatio(3 / 2f), |
| 95 | + bitmap = blurredBitmap.asImageBitmap(), |
| 96 | + contentDescription = null, |
| 97 | + contentScale = ContentScale.FillBounds |
| 98 | + ) |
| 99 | + |
| 100 | + |
| 101 | + Text("Blur radius: ${blurRadius.roundToInt()}") |
| 102 | + |
| 103 | + Slider( |
| 104 | + modifier = Modifier.padding(horizontal = 16.dp), |
| 105 | + value = blurRadius, |
| 106 | + onValueChange = { |
| 107 | + blurRadius = it |
| 108 | + }, |
| 109 | + valueRange = 0.01f..25f |
| 110 | + ) |
| 111 | + } |
| 112 | +} |
| 113 | + |
| 114 | +fun blurBitmap(context: Context, bitmap: Bitmap, blurRadius: Float): Bitmap { |
| 115 | + |
| 116 | + val bitmapToBlur = bitmap.copy(Bitmap.Config.ARGB_8888, true) |
| 117 | + |
| 118 | + val renderScript = RenderScript.create(context) |
| 119 | + val input = Allocation.createFromBitmap(renderScript, bitmapToBlur) |
| 120 | + val output = Allocation.createTyped(renderScript, input.type) |
| 121 | + |
| 122 | + ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript)).apply { |
| 123 | + setRadius(blurRadius) |
| 124 | + setInput(input) |
| 125 | + forEach(output) |
| 126 | + } |
| 127 | + |
| 128 | + output.copyTo(bitmapToBlur) |
| 129 | + renderScript.destroy() |
| 130 | + |
| 131 | + return bitmapToBlur |
| 132 | +} |
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