1 files changed, 119 insertions, 0 deletions
diff --git a/test-app/src/main/java/com/google/android/renderscript_test/IntrinsicResize.kt b/test-app/src/main/java/com/google/android/renderscript_test/IntrinsicResize.kt
new file mode 100644
index 0000000..647efdd
--- /dev/null
+++ b/test-app/src/main/java/com/google/android/renderscript_test/IntrinsicResize.kt
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.renderscript_test
+
+import android.graphics.Bitmap
+import android.renderscript.Allocation
+import android.renderscript.RenderScript
+import android.renderscript.Script
+import android.renderscript.ScriptIntrinsicResize
+import android.renderscript.Type
+import com.google.android.renderscript.Range2d
+
+/**
+ * Does a Resize operation using the RenderScript Intrinsics.
+ */
+fun intrinsicResize(
+    context: RenderScript,
+    inputArray: ByteArray,
+    vectorSize: Int,
+    inSizeX: Int,
+    inSizeY: Int,
+    outSizeX: Int,
+    outSizeY: Int,
+    restriction: Range2d?
+): ByteArray {
+    val scriptResize = ScriptIntrinsicResize.create(context)
+    val builder = Type.Builder(
+        context,
+        renderScriptVectorElementForU8(context, vectorSize)
+    )
+    builder.setX(inSizeX)
+    builder.setY(inSizeY)
+    val inputArrayType = builder.create()
+    val inputAllocation = Allocation.createTyped(context, inputArrayType)
+    builder.setX(outSizeX)
+    builder.setY(outSizeY)
+    val outputArrayType = builder.create()
+    val outAllocation = Allocation.createTyped(context, outputArrayType)
+    val intrinsicOutArray = ByteArray(outSizeX * outSizeY * paddedSize(vectorSize))
+
+    inputAllocation.copyFrom(inputArray)
+    scriptResize.setInput(inputAllocation)
+    if (restriction != null) {
+        outAllocation.copyFrom(intrinsicOutArray) // To initialize to zero
+        val options = Script.LaunchOptions()
+        options.setX(restriction.startX, restriction.endX)
+        options.setY(restriction.startY, restriction.endY)
+        scriptResize.forEach_bicubic(outAllocation, options)
+    } else {
+        scriptResize.forEach_bicubic(outAllocation)
+    }
+    outAllocation.copyTo(intrinsicOutArray)
+
+    inputAllocation.destroy()
+    outAllocation.destroy()
+    scriptResize.destroy()
+    inputArrayType.destroy()
+    outputArrayType.destroy()
+    return intrinsicOutArray
+}
+
+fun intrinsicResize(
+    context: RenderScript,
+    bitmap: Bitmap,
+    outSizeX: Int,
+    outSizeY: Int,
+    restriction: Range2d?
+): ByteArray {
+    val scriptResize = ScriptIntrinsicResize.create(context)
+    val inputAllocation = Allocation.createFromBitmap(context, bitmap)
+    inputAllocation.copyFrom(bitmap)
+
+    val vectorSize = when (bitmap.config) {
+        Bitmap.Config.ARGB_8888 -> 4
+        Bitmap.Config.ALPHA_8 -> 1
+        else -> error("Unrecognized bitmap config $bitmap.config")
+    }
+    val builder = Type.Builder(
+        context,
+        renderScriptVectorElementForU8(context, vectorSize)
+    )
+    builder.setX(outSizeX)
+    builder.setY(outSizeY)
+    val outputArrayType = builder.create()
+    val outAllocation = Allocation.createTyped(context, outputArrayType)
+    val intrinsicOutArray = ByteArray(outSizeX * outSizeY * vectorSize)
+
+    scriptResize.setInput(inputAllocation)
+    if (restriction != null) {
+        outAllocation.copyFrom(intrinsicOutArray) // To initialize to zero
+        val options = Script.LaunchOptions()
+        options.setX(restriction.startX, restriction.endX)
+        options.setY(restriction.startY, restriction.endY)
+        scriptResize.forEach_bicubic(outAllocation, options)
+    } else {
+        scriptResize.forEach_bicubic(outAllocation)
+    }
+    outAllocation.copyTo(intrinsicOutArray)
+
+    inputAllocation.destroy()
+    outAllocation.destroy()
+    outputArrayType.destroy()
+    scriptResize.destroy()
+    return intrinsicOutArray
+}