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Export: Targa (.tga) sequence output, 24-bit RGB or 32-bit RGB + Alpha

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After Effects lists Targa among its still-image output formats; EffectCraft
imported Targa (#745) but could not render to it.

- OutputFormat::TargaSequence ("Targa Sequence", `.tga`, numbered like the
  other sequences; `tga` / `targa` as a format name or output extension).
- Written by the `image` crate's Targa encoder (its `tga` feature, already
  enabled in effectcraft-media; no new crates, Cargo.lock unchanged), with
  run-length compression off: an 18-byte header, top-left origin, 24-bit BGR
  for RGB, 32-bit BGRA with 8 alpha bits in the image descriptor for
  RGB + Alpha (straight or premultiplied), 8-bit grey for Alpha.
- The render queue's size estimate counts the uncompressed bytes.
- CLI usage, the renderQueue command specs, README, architecture.md and
  file-format-parity.md name the new format.

Tests: each Targa frame holds exactly the pixels of the PNG sequence of the
same job, with the expected header, numbering and size; the frames read back
through the Targa importer as the same picture (straight, and premultiplied
when interpreted so); the image-sequence round trip, the format parser and
the renderQueue commands cover it too.
This commit is contained in:
ashokram-si
2026-10-26 15:34:12 +05:30
parent 2961258879
commit c51a08ceb4
13 changed files with 309 additions and 23 deletions
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apps/effectcraft-cli/src/main.rs
+2 -2
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@@ -11,7 +11,7 @@
//! effectcraft-cli get <comp> <layer> <path> [--time S] read a property
//! effectcraft-cli set <comp> <layer> <path> <value> [--time S] [--expression E]
//! effectcraft-cli render-frame [--comp C] [--time S|--frame N] [--max-side PX|--scale K] [--out F.png] [--transparent]
//! effectcraft-cli render [--comp C] --out FILE [--format h264|hevc|av1|prores|webm|png|jpeg|tiff|exr|gif|wav|aiff] [--start S] [--end S]
//! effectcraft-cli render [--comp C] --out FILE [--format h264|hevc|av1|prores|webm|png|jpeg|tiff|exr|tga|gif|wav|aiff] [--start S] [--end S]
//! [--work-area] [--fps N] [--resolution full|half|third|quarter|K] [--quality best|draft] [--channels rgb|rgba]
//! [--jpeg-quality N] [--bitrate KBPS] [--prores proxy|lt|standard|hq|4444|4444xq] [--audio auto|on|off]
//! [--profile main|main10] [--level auto|4.1] [--rate-control bitrate|quality] [--video-quality 1-100]
@@ -107,7 +107,7 @@ const USAGE: &str = "usage: effectcraft-cli <info|commands|exec|run|props|get|se
[--jpeg-quality N] [--bitrate KBPS] [--prores PROFILE] [--audio auto|on|off]
[--profile main|main10] [--level auto|4.1] [--rate-control bitrate|quality] [--video-quality N]
[--keyint FRAMES] [--webm-codec vp9|av1] [--audio-bitrate KBPS] [--opus-app audio|voice] | --queue
(formats h264|hevc|av1|prores|webm|png|jpeg|tiff|exr|gif|wav|aiff;
(formats h264|hevc|av1|prores|webm|png|jpeg|tiff|exr|tga|gif|wav|aiff;
--profile..--keyint: HEVC / AV1, --audio-bitrate/--opus-app: WebM Opus)
a relative --out is relative to the working directory
--progress: progress lines on stderr when it is not a terminal