| /* |
| * Copyright 2020 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 androidx.compose.ui.graphics.painter |
| |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.LayoutDirection |
| import androidx.compose.ui.geometry.Rect |
| import androidx.compose.ui.geometry.Size |
| import androidx.compose.ui.graphics.BlendMode |
| import androidx.compose.ui.graphics.Canvas |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.graphics.ColorFilter |
| import androidx.compose.ui.graphics.ImageAsset |
| import androidx.compose.ui.graphics.Paint |
| import androidx.compose.ui.graphics.compositeOver |
| import androidx.compose.ui.graphics.drawscope.DrawScope |
| import androidx.compose.ui.graphics.drawscope.drawPainter |
| import androidx.compose.ui.graphics.toPixelMap |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertFalse |
| import org.junit.Assert.assertTrue |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class PainterTest { |
| |
| val size = Size(100.0f, 100.0f) |
| |
| @Test |
| fun testPainterDidDraw() { |
| val p = object : Painter() { |
| |
| var didDraw: Boolean = false |
| |
| override val intrinsicSize: Size |
| get() = size |
| |
| override fun DrawScope.onDraw() { |
| didDraw = true |
| } |
| } |
| |
| assertEquals(size, p.intrinsicSize) |
| assertFalse(p.didDraw) |
| |
| drawPainter( |
| p, |
| Canvas(ImageAsset(100, 100)), |
| Size(100f, 100f) |
| ) |
| assertTrue(p.didDraw) |
| } |
| |
| @Test |
| fun testPainterRtl() { |
| val p = object : Painter() { |
| |
| var color = Color.Black |
| |
| override val intrinsicSize: Size |
| get() = size |
| |
| override fun applyLayoutDirection(layoutDirection: LayoutDirection): Boolean { |
| color = if (layoutDirection == LayoutDirection.Rtl) Color.Red else Color.Cyan |
| return true |
| } |
| |
| override fun DrawScope.onDraw() { |
| drawRect(color = color) |
| } |
| } |
| |
| val image = ImageAsset(100, 100) |
| |
| drawPainter( |
| p, |
| Canvas(image), |
| Size(100f, 100f), |
| layoutDirection = LayoutDirection.Rtl |
| ) |
| |
| assertEquals(Color.Red, image.toPixelMap()[50, 50]) |
| } |
| |
| @Test |
| fun testPainterAlpha() { |
| val p = object : Painter() { |
| |
| override val intrinsicSize: Size |
| get() = size |
| |
| override fun DrawScope.onDraw() { |
| drawRect(color = Color.Red) |
| } |
| } |
| |
| val image = ImageAsset(100, 100) |
| val canvas = Canvas(image) |
| |
| val paint = Paint().apply { this.color = Color.White } |
| canvas.drawRect(Rect.fromLTWH(0.0f, 0.0f, 100.0f, 100.0f), paint) |
| |
| drawPainter( |
| p, |
| canvas, |
| size, |
| alpha = 0.5f |
| ) |
| |
| val expected = Color( |
| alpha = 0.5f, |
| red = Color.Red.red, |
| green = Color.Red.green, |
| blue = Color.Red.blue |
| ).compositeOver(Color.White) |
| |
| val result = image.toPixelMap()[50, 50] |
| assertEquals(expected.red, result.red, 0.01f) |
| assertEquals(expected.green, result.green, 0.01f) |
| assertEquals(expected.blue, result.blue, 0.01f) |
| assertEquals(expected.alpha, result.alpha, 0.01f) |
| } |
| |
| @Test |
| fun testPainterCustomAlpha() { |
| val p = object : Painter() { |
| |
| var color = Color.Red |
| |
| override fun applyAlpha(alpha: Float): Boolean { |
| color = |
| Color( |
| alpha = alpha, |
| red = Color.Red.red, |
| blue = Color.Red.blue, |
| green = Color.Red.green |
| ) |
| return true |
| } |
| |
| override val intrinsicSize: Size |
| get() = size |
| |
| override fun DrawScope.onDraw() { |
| drawRect(color = color) |
| } |
| } |
| |
| assertEquals(Color.Red, p.color) |
| val image = ImageAsset(100, 100) |
| val canvas = Canvas(image) |
| |
| val paint = Paint().apply { this.color = Color.White } |
| canvas.drawRect(Rect.fromLTWH(0.0f, 0.0f, 100.0f, 100.0f), paint) |
| |
| drawPainter( |
| p, |
| canvas, |
| size, |
| alpha = 0.5f |
| ) |
| |
| val expected = Color( |
| alpha = 0.5f, |
| red = Color.Red.red, |
| green = Color.Red.green, |
| blue = Color.Red.blue |
| ).compositeOver(Color.White) |
| |
| val result = image.toPixelMap()[50, 50] |
| assertEquals(expected.red, result.red, 0.01f) |
| assertEquals(expected.green, result.green, 0.01f) |
| assertEquals(expected.blue, result.blue, 0.01f) |
| assertEquals(expected.alpha, result.alpha, 0.01f) |
| } |
| |
| @Test |
| fun testColorFilter() { |
| val p = object : Painter() { |
| |
| var colorFilter: ColorFilter? = ColorFilter(Color.Red, BlendMode.srcIn) |
| |
| override fun applyColorFilter(colorFilter: ColorFilter?): Boolean { |
| this.colorFilter = colorFilter |
| return true |
| } |
| |
| override val intrinsicSize: Size |
| get() = size |
| |
| override fun DrawScope.onDraw() { |
| drawRect(color = Color.Black, colorFilter = colorFilter) |
| } |
| } |
| |
| val image = ImageAsset(100, 100) |
| |
| drawPainter( |
| p, |
| Canvas(image), |
| size, |
| colorFilter = ColorFilter(Color.Blue, BlendMode.srcIn) |
| ) |
| assertEquals(Color.Blue, image.toPixelMap()[50, 50]) |
| } |
| } |