facebook/fresco

Images flash upon loading

Open

#1,963 opened on Nov 6, 2017

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enhancementhelp wanted

Description

Description

Upon loading an image (gif/jpg/webp/png) the image flashes the background color then loads the image. I expect that the image would just load and only have a placeholder when the image takes a while to load. This problem is irrelevant to the size of the image (img size 10kb). Even if the image loads immediately the background color flashes.

Reproduction

Essentially just load an image and replace it with another image on the same scene. I have a git project with the issue where it flashes red: https://github.com/dnam50/gifTry.git

ezgif com-video-to-gif

Additional Information

  • Fresco version: [1.5.0]
  • Platform version: [nexus 6 api 25] but has been tried on numerous android devices.

Contributor guide

Tech stack
javaandroid
Domain
mobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic knowledge of Android developmentfamiliarity with Fresco library
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the image loading pipeline in Fresco, focusing on the transition from placeholder to loaded image. The issue reports that images flash a background color before displaying, even for small images. The reproduction repository (https://github.com/dnam50/gifTry.git) demonstrates the problem with a red flash. Check the DraweeController or ImagePipeline for any unintended background color rendering. Look into the settings for fadeDuration or placeholder image handling. The fix might involve ensuring that the background color of the image view is not shown during loading or adjusting the transition animation.