JDK-8293537 : PoC - Implement LCD Text Rendering
  • Type: Enhancement
  • Component: javafx
  • Sub-Component: graphics
  • Affected Version: internal
  • Priority: P3
  • Status: Closed
  • Resolution: Delivered
  • OS: os_x
  • CPU: generic
  • Submitted: 2022-09-08
  • Updated: 2025-05-22
  • Resolved: 2025-05-22
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Other
internalResolved
Related Reports
Blocks :  
JDK-8271024 - ☂ JavaFX : Implement Metal Rendering Pipeline
Relates :  
JDK-8357266 - Add log to use ES2 pipeline on macOS for LCD text
Relates :  
JDK-8236689 - macOS 10.15 Catalina: LCD text renders badly
Comments
Since metal LCD output matches with ES2, this task is marked as delivered and LCD text rendering works as expected.
22-05-2025
It is verified that Metal LCD text rendering output matches that of ES2 with current code present in Metal repo. If we render text of small size(large size texts are drawn as shapes) with -Dprism.lcdtext=true and FontSmoothingType.LCD in metal pipeline, it is able to fetch 24 bpp glyphs and draw them using 2 pass metal shader(Solid_TextureFirstPassLCD & Solid_TextureSecondPassLCD). This matching behaviour is also verified using a label where by default it has LCD Font smoothing and we just need to use -Dprism.lcdtext=true. Attached images of text and label rendered using LCD glyphs for both Metal and ES2 pipeline.
22-05-2025