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#821: import Targa and DPX stills and image sequences

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Problem: Premiere imports Targa and DPX as stills and numbered sequences.
FilmCraft exports both (#779) but could not read either: the extensions
were not importable and the image crate has no DPX reader, so even our
own Targa / DPX renders could not come back in.

Fix: clean-room decoders in filmcraft-media. Targa from the TGA 2.0 spec:
image types 1/2/3 and RLE 9/10/11, colour maps, 15/16/24/32-bit, 8/16-bit
grayscale, any origin. DPX from SMPTE ST 268: first element, luma / RGB /
RGBA / ABGR, 8/16-bit, filled 10/12-bit (methods A and B), either byte
order, padded lines, orientations 0-3. Both bound allocations by the
data present and reject hostile headers with errors. Stills and image
sequences share one decode_raster entry point; "tga" and "dpx" join the
importable still extensions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
vangel76
2026-10-11 00:58:15 +02:00
co-authored by Claude Opus 5.5
parent 9efe8f3112
commit fe52bc0b2c
8 changed files with 683 additions and 27 deletions
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docs/file-format-parity.md
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@@ -56,8 +56,8 @@ only). "Tested" names the evidence.
| WebP | — | yes | no | ahead |
| **PSD** (layers as sequence) | read (layered) | no | — | 0% |
| **OpenEXR** | read + write | no | sequences (half float, linear RGB / premultiplied RGBA, uncompressed; #806) | 35% |
| **DPX** | read + write | no | sequences (10-bit RGB, BT.709; #779) | 40% |
| Targa | read + write | no | sequences (24-bit, 32-bit with alpha; #779) | 40% |
| **DPX** | read + write | yes: luma / RGB / RGBA, 8–16-bit, filled 10/12-bit, either byte order (#821); no packed 10/12-bit, RLE or Y'CbCr | sequences (10-bit RGB, BT.709; #779) | 80% |
| Targa | read + write | yes: every image type, RLE, colour maps, 15–32-bit (#821) | sequences (24-bit, 32-bit with alpha; #779) | 95% |
| HEIF / HEIC | read | no | — | 0% |
| Radiance HDR, AI / EPS, ICO, PTL | read | no | — | 0% |
@@ -84,7 +84,7 @@ only). "Tested" names the evidence.
## Summary
**File formats dimension: ~60%, 140–240 h** (codecs counted separately). The beta blocker is
`.prproj`. After it, by user impact: AVI and WMV import, EXR / DPX / PSD stills, AAF / OMF
`.prproj`. After it, by user impact: AVI and WMV import, EXR / PSD stills, AAF / OMF
validation in Avid and Pro Tools, DVD / Blu-ray / DCP / broadcast MXF delivery.
## Revision history