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Implement BlurTransformationPlugin (#959)
* Implement BlurTransformationPlugin * Update gitignore and add missing aar file * Update to compileOnly
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| /build | ||
| /build | ||
| !/libs/** |
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51 changes: 51 additions & 0 deletions
51
...tlin/io/getstream/video/android/compose/ui/components/plugins/BlurTransformationPlugin.kt
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| /* | ||
| * Copyright (c) 2014-2023 Stream.io Inc. All rights reserved. | ||
| * | ||
| * Licensed under the Stream License; | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://github.com/GetStream/stream-video-android/blob/main/LICENSE | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package io.getstream.video.android.compose.ui.components.plugins | ||
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| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.Immutable | ||
| import androidx.compose.ui.graphics.ImageBitmap | ||
| import androidx.compose.ui.graphics.painter.Painter | ||
| import com.skydoves.landscapist.plugins.ImagePlugin | ||
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| /** | ||
| * Originated from [Landscapist](https://github.com/skydoves/landscapist). | ||
| * | ||
| * BlurTransformationPlugin adds blur transformation effect while rendering an image. | ||
| * An image plugin that extends [ImagePlugin.PainterPlugin] to be executed while rendering painters. | ||
| * | ||
| * @property radius The radius of the pixels used to blur, a value from 0 to infinite. Default is 10. | ||
| */ | ||
| @Immutable | ||
| internal data class BlurTransformationPlugin( | ||
| val radius: Int = 10, | ||
| ) : ImagePlugin.PainterPlugin { | ||
|
|
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| /** | ||
| * Compose circular reveal painter with an [imageBitmap] to the given [painter]. | ||
| * | ||
| * @param imageBitmap A target [ImageBitmap] to be drawn on the painter. | ||
| * @param painter A given painter to be executed circular reveal animation. | ||
| */ | ||
| @Composable | ||
| override fun compose(imageBitmap: ImageBitmap, painter: Painter): Painter { | ||
| return painter.rememberBlurPainter( | ||
| imageBitmap = imageBitmap, | ||
| radius = radius, | ||
| ) | ||
| } | ||
| } |
80 changes: 80 additions & 0 deletions
80
...in/kotlin/io/getstream/video/android/compose/ui/components/plugins/RememberBlurPainter.kt
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| /* | ||
| * Copyright (c) 2014-2023 Stream.io Inc. All rights reserved. | ||
| * | ||
| * Licensed under the Stream License; | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://github.com/GetStream/stream-video-android/blob/main/LICENSE | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package io.getstream.video.android.compose.ui.components.plugins | ||
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| import android.graphics.Bitmap | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.graphics.ImageBitmap | ||
| import androidx.compose.ui.graphics.asAndroidBitmap | ||
| import androidx.compose.ui.graphics.asImageBitmap | ||
| import androidx.compose.ui.graphics.painter.Painter | ||
| import com.google.android.renderscript.Toolkit | ||
|
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| /** | ||
| * Originated from [Landscapist](https://github.com/skydoves/landscapist). | ||
| * | ||
| * This is an extension of the [Painter] for giving blur transformation effect to the given [imageBitmap]. | ||
| * | ||
| * @param imageBitmap an image bitmap for loading the content. | ||
| * @property radius The radius of the pixels used to blur, a value from 1 to 25. Default is 10. | ||
| */ | ||
| @Composable | ||
| internal fun Painter.rememberBlurPainter( | ||
| imageBitmap: ImageBitmap, | ||
| radius: Int, | ||
| ): Painter { | ||
| var androidBitmap = imageBitmap.asAndroidBitmap() | ||
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||
| if (!( | ||
| androidBitmap.config == Bitmap.Config.ARGB_8888 || | ||
| androidBitmap.config == Bitmap.Config.ALPHA_8 | ||
| ) | ||
| ) { | ||
| androidBitmap = androidBitmap.copy(Bitmap.Config.ARGB_8888, false) | ||
| } | ||
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| val blurredBitmap = remember(imageBitmap, radius) { | ||
| iterativeBlur(androidBitmap, radius) | ||
| } | ||
| return remember(this) { | ||
| TransformationPainter( | ||
| imageBitmap = blurredBitmap.asImageBitmap(), | ||
| painter = this, | ||
| ) | ||
| } | ||
| } | ||
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| private fun iterativeBlur( | ||
| androidBitmap: Bitmap, | ||
| radius: Int, | ||
| ): Bitmap { | ||
| val iterate = (radius + 1) / 25 | ||
| var bitmap: Bitmap = Toolkit.blur( | ||
| inputBitmap = androidBitmap, | ||
| radius = (radius + 1) % 25, | ||
| ) | ||
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| for (i in 0 until iterate) { | ||
| bitmap = Toolkit.blur( | ||
| inputBitmap = bitmap, | ||
| radius = 25, | ||
| ) | ||
| } | ||
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| return bitmap | ||
| } |
102 changes: 102 additions & 0 deletions
102
.../kotlin/io/getstream/video/android/compose/ui/components/plugins/TransformationPainter.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * Copyright (c) 2014-2023 Stream.io Inc. All rights reserved. | ||
| * | ||
| * Licensed under the Stream License; | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://github.com/GetStream/stream-video-android/blob/main/LICENSE | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package io.getstream.video.android.compose.ui.components.plugins | ||
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| import android.graphics.Matrix | ||
| import android.graphics.RectF | ||
| import androidx.compose.ui.geometry.Size | ||
| import androidx.compose.ui.geometry.toRect | ||
| import androidx.compose.ui.graphics.ImageBitmap | ||
| import androidx.compose.ui.graphics.ImageShader | ||
| import androidx.compose.ui.graphics.Paint | ||
| import androidx.compose.ui.graphics.ShaderBrush | ||
| import androidx.compose.ui.graphics.TileMode | ||
| import androidx.compose.ui.graphics.asAndroidBitmap | ||
| import androidx.compose.ui.graphics.drawscope.DrawScope | ||
| import androidx.compose.ui.graphics.drawscope.drawIntoCanvas | ||
| import androidx.compose.ui.graphics.painter.Painter | ||
| import androidx.core.util.Pools | ||
|
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| /** | ||
| * Originated from [Landscapist](https://github.com/skydoves/landscapist). | ||
| * | ||
| * TransformationPainter is a [Painter] which draws the [imageBitmap] to the given [painter]. | ||
| * | ||
| * @param imageBitmap an image bitmap for loading for the content. | ||
| * @param painter an image painter to draw an [ImageBitmap] into the provided canvas. | ||
| */ | ||
| internal class TransformationPainter( | ||
| private val imageBitmap: ImageBitmap, | ||
| private val painter: Painter, | ||
| ) : Painter() { | ||
|
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| /** return the dimension size of the [painter]'s intrinsic width and height. */ | ||
| override val intrinsicSize: Size get() = painter.intrinsicSize | ||
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| override fun DrawScope.onDraw() { | ||
| drawIntoCanvas { canvas -> | ||
| var dx = 0f | ||
| var dy = 0f | ||
| val scale: Float | ||
| val shaderMatrix = Matrix() | ||
| val shader = ImageShader(imageBitmap, TileMode.Clamp) | ||
| val brush = ShaderBrush(shader) | ||
| val paint = paintPool.acquire() ?: Paint() | ||
| paint.asFrameworkPaint().apply { | ||
| isAntiAlias = true | ||
| isDither = true | ||
| isFilterBitmap = true | ||
| } | ||
|
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| // cache the paint in the internal stack. | ||
| canvas.saveLayer(size.toRect(), paint) | ||
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| val mDrawableRect = RectF(0f, 0f, size.width, size.height) | ||
| val bitmapWidth: Int = imageBitmap.asAndroidBitmap().width | ||
| val bitmapHeight: Int = imageBitmap.asAndroidBitmap().height | ||
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| if (bitmapWidth * mDrawableRect.height() > mDrawableRect.width() * bitmapHeight) { | ||
| scale = mDrawableRect.height() / bitmapHeight.toFloat() | ||
| dx = (mDrawableRect.width() - bitmapWidth * scale) * 0.5f | ||
| } else { | ||
| scale = mDrawableRect.width() / bitmapWidth.toFloat() | ||
| dy = (mDrawableRect.height() - bitmapHeight * scale) * 0.5f | ||
| } | ||
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| // resize the matrix to scale by sx and sy. | ||
| shaderMatrix.setScale(scale, scale) | ||
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| // post translate the matrix with the specified translation. | ||
| shaderMatrix.postTranslate( | ||
| (dx + 0.5f) + mDrawableRect.left, | ||
| (dy + 0.5f) + mDrawableRect.top, | ||
| ) | ||
| // apply the scaled matrix to the shader. | ||
| shader.setLocalMatrix(shaderMatrix) | ||
| // draw an image bitmap as a rect. | ||
| drawRect(brush = brush) | ||
| // restore canvas. | ||
| canvas.restore() | ||
| // resets the paint and release to the pool. | ||
| paint.asFrameworkPaint().reset() | ||
| paintPool.release(paint) | ||
| } | ||
| } | ||
| } | ||
|
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| /** paint pool which caching and reusing [Paint] instances. */ | ||
| private val paintPool = Pools.SimplePool<Paint>(2) |