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Add support for layer blend mode "bm" for NORMAL, SCREEN, OVERLAY, DA…
…RKEN, LIGHTEN, and ADD (#2408) Adds support for "bm" (BlendMode) on layers. Possibly addresses #1055 Might need a little bit of a refactor. Relies on `Paint.setBlendMode()` available in android Q and up. ## Sample before & after   Co-authored-by: Gabriel Peal <gpeal@users.noreply.github.com>
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lottie/src/main/java/com/airbnb/lottie/model/content/LBlendMode.java
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| package com.airbnb.lottie.model.content; | ||
|
|
||
| import androidx.annotation.Nullable; | ||
| import androidx.core.graphics.BlendModeCompat; | ||
|
|
||
| /** | ||
| * Lottie BlendMode, | ||
| * not to be confused with Paint.BlendMode in android graphics core, | ||
| * which we will rely on for rendering. | ||
| */ | ||
| public enum LBlendMode { | ||
| NORMAL, | ||
| MULTIPLY, | ||
| SCREEN, | ||
| OVERLAY, | ||
| DARKEN, | ||
| LIGHTEN, | ||
| COLOR_DODGE, | ||
| COLOR_BURN, | ||
| HARD_LIGHT, | ||
| SOFT_LIGHT, | ||
| DIFFERENCE, | ||
| EXCLUSION, | ||
| HUE, | ||
| SATURATION, | ||
| COLOR, | ||
| LUMINOSITY, | ||
| ADD, | ||
| HARD_MIX; | ||
|
|
||
| @Nullable | ||
| public BlendModeCompat toNativeBlendMode() { | ||
| switch (this) { | ||
| case NORMAL: | ||
| return null; | ||
| case SCREEN: | ||
| return BlendModeCompat.SCREEN; | ||
| case OVERLAY: | ||
| return BlendModeCompat.OVERLAY; | ||
| case DARKEN: | ||
| return BlendModeCompat.DARKEN; | ||
| case LIGHTEN: | ||
| return BlendModeCompat.LIGHTEN; | ||
| case ADD: | ||
| return BlendModeCompat.PLUS; | ||
|
|
||
| // Blend modes below were not added to the platform until Q. | ||
| // To prevent unexpected issues where animations look correct | ||
| // during development but silently break for users with older devices | ||
| // we won't support any of these until Q is widely used. | ||
| case MULTIPLY: | ||
| case COLOR_DODGE: | ||
| case COLOR_BURN: | ||
| case HARD_LIGHT: | ||
| case SOFT_LIGHT: | ||
| case DIFFERENCE: | ||
| case EXCLUSION: | ||
| case HUE: | ||
| case SATURATION: | ||
| case COLOR: | ||
| case LUMINOSITY: | ||
| case HARD_MIX: | ||
| default: | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| } |
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