🔖 Version Tag

• 🚀 New Features:
  • ✨ mirx image format support — icu now decodes and encodes mirx FLAT images (all pixel formats: RGB565 / RGB565Swapped / RGB888 / RGBA8888 / BGRA8888 / XRGB8888) plus mirx CHUNK files with VECTOR / FONT chunks. icu convert -F mirx produces mirx output; icu info reports per-chunk metadata (op_count, glyph_count, source_size, bit_depth).
  • ✨ TTF/OTF/TTC font parsing via ttf-parser — icu info on a TTF reports family, style, units_per_em, ascender, descender, line_height, glyph_count. Glyph outlines collect into mirx::PathCmd (MoveTo / LineTo / QuadTo / CubicTo / Close) with 24.8 fixed coordinates.
  • ✨ icu bake-font CLI — bakes a TTF/OTF into a mirx FONT chunk (SDF or grayscale atlas). Pipeline: ttf-parser outline → mirui scanline coverage → Euclidean distance transform → 4/8-bit quantization (SDF) or packed coverage (gray). Supports --charset / --charset-file / --size / --bit-depth / --spread / --format sdf|gray.
  • ✨ icu merge-fonts CLI — merges multiple single-font .mirx files into one multi-FONT-chunk bundle for MultiFontProvider size-based selection at runtime.
  • ✨ SVG import/export — icu info / icu show / icu convert accept SVG. Import uses usvg (resolves <defs>, <use>, <symbol>, transform lists, style inheritance, gradients/clip-paths/masks). Export emits <path> / <rect> / <line> / <g> with fill, fill-opacity, fill-rule, stroke, stroke-width, stroke-linecap, stroke-linejoin, transform. icu convert test.svg -F mirx produces a VECTOR chunk.
  • ✨ MiData::PATH / FONT / INDEXED variants — MiData carries structured data alongside the flat RGBA preview. PATH(SceneData) wraps mirx::Scene; FONT(FontData) is an enum (Mirx(mirx::Font) | FreeType(FreeTypeFontData)); INDEXED(IndexedImageData) carries palette + per-pixel indexes + bpp.
  • ✨ Font/path/indexed viewer panels in the GUI — ImageItem carries the original MiData; central panel dispatches on variant. FONT shows metadata + preview-text input + rendered atlas; PATH shows a scene op tree; INDEXED shows a palette grid whose entries drive an IndexHoverOverlay.
  • ✨ SDF → Gray downsample — sdf_to_gray_font samples an SDF atlas at a target pixel size and packs coverage into an 8-bit grayscale font, no re-bake from TTF needed.
  • ✨ Postprocess overlay framework — ImageOverlay trait + OverlayStack composite with alpha blending and dirty-flag cache. IndexHoverOverlay highlights palette-indexed pixels; QualityOverlay renders a quantization-error heat map; DiffOverlay drives the diff display.
  • ✨ LVGL indexed decode — I1/I2/I4/I8 color formats decode to MiData::INDEXED with palette + indexes + bpp extracted before the generic RGBA conversion.
  • ✨ ColorFormat unification — icu_lib::endecoder::ColorFormat is the universal enum; LVGL and mirx each From their own wire format. EncoderParams.color_format is now icu_lib::ColorFormat.
• 🔧 Improvements:
  • 🧹 Diff display routed through OverlayStack + DiffOverlay. ImageDiffResult still feeds diff_panel pixel list / min-max range.
  • 🧹 icu_lib re-exports mirx and image crates.
  • 🧹 MiData + all variants derive Clone + PartialEq.

📦 Dependencies

• ➕ ttf-parser = "0.25" (icu_lib)
• ➕ usvg = { version = "0.47", default-features = false } (icu_lib; no fontdb, no text shaping — +~510KB binary)
• ➕ mirx = "0.41" + mirui = { version = "0.41", default-features = false } + critical-section = { version = "1", features = ["std"] } (icu_lib)