Cell Info uniform

[Flix3r]

Add a new uniform texture iCellInfo for custom shaders that encodes cell style attributes (bold, italic, etc.).

The texture is the same size as iChannel0 (screen size) and can be sampled to check cell attributes at any screen position.

• R channel: bold (255 if bold, 0 otherwise)
• G channel: italic (255 if italic, 0 otherwise)
• B channel: faint (255 if faint, 0 otherwise)
• A channel: other flags encoded as bits:
  • bit 0: blink
  • bit 1: inverse
  • bit 2: invisible
  • bit 3: strikethrough
  • bit 4: overline
  • bits 5-7: underline type (0=none, 1=single, 2=double, 3=curly, 4=dotted, 5=dashed)

Example usage

vec4 cellInfo = texture(iCellInfo, fragCoord);
bool isBold = cellInfo.r > 0.5;
bool isItalic = cellInfo.g > 0.5;

I have already implemented and tested this, though because I have no experience with Zig all code was written by AI.