Frame output always reports 512x480; active width, overscan and interlace field are not exposed #2

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opened 2026-10-28 22:47:59 +00:00 by Gatchan · 2 comments

Gatchan commented

2026-10-28 22:47:59 +00:00

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ff6_frame_output_t.width/height are fixed at 512/480 by hw_picture() (core/hw/hw.c) because LakeSnes always renders a doubled 512x480 frame. The brief asks for metadata: active width (256/512), lines (224/239), interlaced, field.

Needed: read the PPU state (pseudo-hires/hires, overscan, interlace, even/odd field) in hw_picture and fill the metadata; hosts and ff6cli --shot then crop/scale from it.

Check: title screen (224 lines, 256 wide) and a known 239-line or hires scene if any exists in FF6 (to find).

`ff6_frame_output_t.width/height` are fixed at 512/480 by `hw_picture()` (`core/hw/hw.c`) because LakeSnes always renders a doubled 512x480 frame. The brief asks for metadata: active width (256/512), lines (224/239), interlaced, field. Needed: read the PPU state (pseudo-hires/hires, overscan, interlace, even/odd field) in `hw_picture` and fill the metadata; hosts and `ff6cli --shot` then crop/scale from it. Check: title screen (224 lines, 256 wide) and a known 239-line or hires scene if any exists in FF6 (to find).

Gatchan added this to the Phase 1 - scaffold milestone

2026-10-28 22:47:59 +00:00

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2026-10-28 22:47:59 +00:00

Gatchan commented

2026-10-29 17:22:43 +00:00

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Starting: delegated to a fresh agent (background), one branch and PR per issue.

Gatchan referenced this issue from a commit

2026-10-29 18:41:17 +00:00

hw: frame metadata from the PPU (active width, lines, interlace, field), ff6_frame_picture (refs #2)

Gatchan referenced this issue from a commit

2026-10-29 18:41:17 +00:00

tools: ff6cli --shot, drive shot and ff6_screenshot crop from the frame metadata, fixes #2

Gatchan referenced this issue from a pull request that will close it,

2026-10-29 19:00:21 +00:00

Frame metadata: active width, lines, interlace, field; shots crop from it #29

Gatchan closed this issue

2026-10-29 19:07:08 +00:00

Gatchan commented

2026-10-29 19:07:20 +00:00

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Merged (PR #29), after merging main (no manual conflict). Main-session check: release --fast 22/22 incl. rom.frame.*; ff6cli --shot 600 gives a 256x224 title screen, checked by eye. Finding: FF6 never uses interlace, overscan or hires (all $2133 writes store 0; 0 unusual frames over 80 000 replayed frames, US/JP).

Merged (PR #29), after merging main (no manual conflict). Main-session check: release `--fast` 22/22 incl. `rom.frame.*`; `ff6cli --shot 600` gives a 256x224 title screen, checked by eye. Finding: FF6 never uses interlace, overscan or hires (all $2133 writes store 0; 0 unusual frames over 80 000 replayed frames, US/JP).