diff options
Diffstat (limited to 'test-app/src/main/java/com/google/android/renderscript_test/ReferenceResize.kt')
| -rw-r--r-- | test-app/src/main/java/com/google/android/renderscript_test/ReferenceResize.kt | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/test-app/src/main/java/com/google/android/renderscript_test/ReferenceResize.kt b/test-app/src/main/java/com/google/android/renderscript_test/ReferenceResize.kt new file mode 100644 index 0000000..06d3653 --- /dev/null +++ b/test-app/src/main/java/com/google/android/renderscript_test/ReferenceResize.kt @@ -0,0 +1,157 @@ +/* + * 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 com.google.android.renderscript.Range2d +import kotlin.math.floor +import kotlin.math.max + +var trace = false + +/** + * Reference implementation of a Resize operation. + */ +@ExperimentalUnsignedTypes +fun referenceResize(inputArray: ByteArray, + vectorSize: Int, + inSizeX: Int, + inSizeY: Int, + outSizeX: Int, outSizeY: Int, + restriction: Range2d?): ByteArray { + val input = Vector2dArray(inputArray.asUByteArray(), vectorSize, inSizeX, inSizeY) + val scaleX: Float = input.sizeX.toFloat() / outSizeX.toFloat() + val scaleY: Float = input.sizeY.toFloat() / outSizeY.toFloat() + val outArray = UByteArray(outSizeX * outSizeY * paddedSize(input.vectorSize)) + val out = Vector2dArray(outArray, input.vectorSize, outSizeX, outSizeY) + out.forEach (restriction) { x, y -> + if (x == 1827 && y == 46) { + println("Found it") + trace = true + } + val o = bicubicU4(x, y, input, scaleX, scaleY) + out[x, y] = o.clampToUByte() + } + return out.values.asByteArray() +} + +private fun cubicInterpolateF(p0: FloatArray, p1: FloatArray, p2: FloatArray, p3: FloatArray, + x: Float): FloatArray { + return p1 + (p2 - p0 + (p0 * 2f - p1 * 5f + p2 * 4f - p3 + + ((p1 - p2) * 3f + p3 - p0) * x) * x) * x * 0.5f +} + +@ExperimentalUnsignedTypes +private fun bicubicU4(x: Int, y: Int, gIn: Vector2dArray, scaleX: Float, scaleY: Float): FloatArray { + var xf: Float = (x + 0.5f) * scaleX - 0.5f + var yf: Float = (y + 0.5f) * scaleY - 0.5f + + val startX: Int = floor(xf - 1).toInt() + val startY: Int = floor(yf - 1).toInt() + xf -= floor(xf) + yf -= floor(yf) + val maxX: Int = gIn.sizeX - 1 + val maxY: Int = gIn.sizeY - 1 + + val xs0: Int = max(0, startX + 0) + val xs1: Int = max(0, startX + 1) + val xs2: Int = kotlin.math.min(maxX, startX + 2) + val xs3: Int = kotlin.math.min(maxX, startX + 3) + + val ys0: Int = max(0, startY + 0) + val ys1: Int = max(0, startY + 1) + val ys2: Int = kotlin.math.min(maxY, startY + 2) + val ys3: Int = kotlin.math.min(maxY, startY + 3) + + val p00 = gIn[xs0, ys0].toFloatArray() + val p01 = gIn[xs1, ys0].toFloatArray() + val p02 = gIn[xs2, ys0].toFloatArray() + val p03 = gIn[xs3, ys0].toFloatArray() + val p0 = cubicInterpolateF(p00, p01, p02, p03, xf) + + val p10 = gIn[xs0, ys1].toFloatArray() + val p11 = gIn[xs1, ys1].toFloatArray() + val p12 = gIn[xs2, ys1].toFloatArray() + val p13 = gIn[xs3, ys1].toFloatArray() + val p1 = cubicInterpolateF(p10, p11, p12, p13, xf) + + val p20 = gIn[xs0, ys2].toFloatArray() + val p21 = gIn[xs1, ys2].toFloatArray() + val p22 = gIn[xs2, ys2].toFloatArray() + val p23 = gIn[xs3, ys2].toFloatArray() + val p2 = cubicInterpolateF(p20, p21, p22, p23, xf) + + val p30 = gIn[xs0, ys3].toFloatArray() + val p31 = gIn[xs1, ys3].toFloatArray() + val p32 = gIn[xs2, ys3].toFloatArray() + val p33 = gIn[xs3, ys3].toFloatArray() + val p3 = cubicInterpolateF(p30, p31, p32, p33, xf) + + return cubicInterpolateF(p0, p1, p2, p3, yf) +} + + +/* To be used if we implement Floats +private fun bicubic_F4(x: Int, y: Int, gin: ByteArray, sizeX: Int, sizeY: Int, scaleX: Float, scaleY: Float): Float4 { + var xf: Float = (x + 0.5f) * scaleX - 0.5f + var yf: Float = (y + 0.5f) * scaleY - 0.5f + + val startX: Int = floor(xf - 1).toInt() + val startY: Int = floor(yf - 1).toInt() + xf = xf - floor(xf) + yf = yf - floor(yf) + val maxX: Int = sizeX - 1 + val maxY: Int = sizeY - 1 + + val xs0: Int = max(0, startX + 0) + val xs1: Int = max(0, startX + 1) + val xs2: Int = min(maxX, startX + 2) + val xs3: Int = min(maxX, startX + 3) + + val ys0: Int = max(0, startY + 0) + val ys1: Int = max(0, startY + 1) + val ys2: Int = min(maxY, startY + 2) + val ys3: Int = min(maxY, startY + 3) + + val p00: Float4 = rsGetElementAt_Float4(gIn, xs0, ys0) + val p01: Float4 = rsGetElementAt_Float4(gIn, xs1, ys0) + val p02: Float4 = rsGetElementAt_Float4(gIn, xs2, ys0) + val p03: Float4 = rsGetElementAt_Float4(gIn, xs3, ys0) + val p0: Float4 = cubicInterpolate_F4(p00, p01, p02, p03, xf) + + val p10: Float4 = rsGetElementAt_Float4(gIn, xs0, ys1) + val p11: Float4 = rsGetElementAt_Float4(gIn, xs1, ys1) + val p12: Float4 = rsGetElementAt_Float4(gIn, xs2, ys1) + val p13: Float4 = rsGetElementAt_Float4(gIn, xs3, ys1) + val p1: Float4 = cubicInterpolate_F4(p10, p11, p12, p13, xf) + + val p20: Float4 = rsGetElementAt_Float4(gIn, xs0, ys2) + val p21: Float4 = rsGetElementAt_Float4(gIn, xs1, ys2) + val p22: Float4 = rsGetElementAt_Float4(gIn, xs2, ys2) + val p23: Float4 = rsGetElementAt_Float4(gIn, xs3, ys2) + val p2: Float4 = cubicInterpolate_F4(p20, p21, p22, p23, xf) + + val p30: Float4 = rsGetElementAt_Float4(gIn, xs0, ys3) + val p31: Float4 = rsGetElementAt_Float4(gIn, xs1, ys3) + val p32: Float4 = rsGetElementAt_Float4(gIn, xs2, ys3) + val p33: Float4 = rsGetElementAt_Float4(gIn, xs3, ys3) + val p3: Float4 = cubicInterpolate_F4(p30, p31, p32, p33, xf) + + val p: Float4 = cubicInterpolate_F4(p0, p1, p2, p3, yf) + + return p +} +*/ |