Font builder

src/README.md

@@ -89,7 +89,7 @@ Intentionally not included yet:
 - additional input format conversion/scaling
 - temporal/history/feedback shader storage
 - texture/LUT asset upload
-- text-parameter rasterization
+- text-parameter rasterization and font atlas GL binding
 - runtime state
 - OSC control
 - persistent control/state writes
@@ -141,6 +141,7 @@ This tracks parity with `apps/LoopThroughWithOpenGLCompositing`.
 - [ ] Feedback buffers
 - [ ] Texture asset loading and upload
 - [ ] LUT asset loading and upload
+- [x] CPU-side MSDF/MTSDF font atlas generation cache
 - [ ] Text parameter rasterization
 - [ ] Trigger history/event buffers for overlapping repeated trigger effects
 - [ ] Full runtime state store/read model
@@ -352,6 +353,7 @@ Current runtime shader support is deliberately limited to stateless full-frame p
 - no temporal history
 - no feedback storage
 - no texture/LUT assets yet
+- font atlas generation is CPU-side only; text parameter atlas upload/binding is not render-ready yet
 - no text parameters yet
 - manifest defaults initialize parameters
 - HTTP controls can update runtime parameter values without rebuilding GL programs when the shader program is unchanged