NotMyFault Posted November 10, 2022 Share Posted November 10, 2022 Rendering on iPad still uses forced dithering of gradients, and caps rendering of 16 bit documents at 8 bit resolution despite OS and display hardware support more color depth. Quote Mac mini M1 A2348 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
mvanzyl Posted November 10, 2022 Share Posted November 10, 2022 All iPads are currently 8 bit displays. The M2 Macbook Air and the M1 Macbook Pro have 10 bit panels, but the iPads (even mini LED versions) unfortunately do not. Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted November 10, 2022 Author Share Posted November 10, 2022 30 minutes ago, mvanzyl said: All iPads are currently 8 bit displays. The M2 Macbook Air and the M1 Macbook Pro have 10 bit panels, but the iPads (even mini LED versions) unfortunately do not. Not convinced. In HDR RGB/32 Mode, you don’t see any banding in contrast to RGB16 mode. Quote Mac mini M1 A2348 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted November 11, 2022 Author Share Posted November 11, 2022 13 hours ago, mvanzyl said: All iPads are currently 8 bit displays. The M2 Macbook Air and the M1 Macbook Pro have 10 bit panels, but the iPads (even mini LED versions) unfortunately do not. Even if the display HW may be limited to 8 bit, Apple seems to use FRC or similar methods to dither results. Screen captures get opened in Affinity as RGB/16 - this must have a reason. image shows RGB/32 document and a gradient over 256 pixel from25% to 75% grey, and a black line as reference for pixel size (image is zoomed in, then screenshot). If display were limited to 8 bit, you would see banding (4 pixels having the same color). You can’t. Quote Mac mini M1 A2348 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted November 11, 2022 Author Share Posted November 11, 2022 When using a rgb/16, you get 3 color steps for a gradient from 50% to 51% grey. this is the same as rgb/8, it should show more color resolution: when using rgb/32, you get much more steps: Quote Mac mini M1 A2348 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
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