Michael Grant
45f32d71ef
Fix indents.
2026-08-25 11:23:52 +01:00
Michael Grant
40cd869d77
Readability and clarity.
2026-08-25 11:23:52 +01:00
Michael Grant
4c3983e286
image: add manual visual checks
2026-08-25 11:23:52 +01:00
Michael Grant
c2426fcf08
image: preserve fractional cell extents
2026-08-25 11:23:52 +01:00
Michael Grant
c97ceaffe8
image: select backend after terminal setup
2026-08-25 11:23:52 +01:00
Michael Grant
047308b156
image: retain ordered placements in the grid
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Replace the per-cell image marker with sparse placement spans attached to
grid lines. A placement owns all of its spans and records the input
protocol, application image and placement IDs, z-index, and creation order.
This retains overlapping image layers without storing a list in every grid
cell. Grid operations move, split, clip, and remove only the affected spans.
Use the input protocol to determine image/text interaction: later text
damages SIXEL spans, while Kitty placements remain and are ordered by their
z-index. Rendering then adapts that one logical scene for each client,
rather than changing its semantics according to whether the outer terminal
uses Kitty or SIXEL.
2026-08-25 11:23:52 +01:00
Michael Grant
cf80845be7
Change some names of things for clarity.
2026-08-25 11:23:52 +01:00
Michael Grant
b6dbf10057
Redraw SIXEL images before or after text depending on which was placed first in the cell.
2026-08-25 11:23:52 +01:00
Michael Grant
54d3f77c2c
The implementation now distinguishes a newly placed image cell from one later overwritten by text. On a SIXEL terminal, damaged cells are omitted from image output; on Kitty they remain ordinary positional placements.
2026-08-25 11:22:26 +01:00
Michael Grant
ed63826b15
Cleanup.
2026-08-25 11:22:26 +01:00
Michael Grant
b89f8b0624
Update Kitty image names
2026-08-25 11:22:26 +01:00
Michael Grant
c1cab6ea34
More cleanup of "histogram" name.
2026-08-25 11:22:26 +01:00
Michael Grant
89a7dcc8ab
Shorten image and SIXEL names
2026-08-25 11:22:26 +01:00
Michael Grant
48b6641d97
Avoid overflow in image cell size calculation
2026-08-25 11:22:26 +01:00
Michael Grant
37b71800b5
Move image cell drawing into image.c
2026-08-25 11:22:26 +01:00
Michael Grant
5c9ae058bf
Expose image backend flags
2026-08-25 11:22:26 +01:00
Michael Grant
db7ec915ea
Do not enable sync for SIXEL
2026-08-25 11:22:26 +01:00
Michael Grant
04644c7267
Comment sixel_from_image().
2026-08-25 11:22:26 +01:00
Michael Grant
d53f8eff9e
Add comments to image functions
2026-08-25 11:22:26 +01:00
Michael Grant
03efb5e293
Preserve text behind transparent Kitty images.
2026-08-25 11:22:26 +01:00
Michael Grant
2603f84b0a
Revert "Clear text beneath SIXEL image placements."
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This reverts commit 64cea48f91
2026-08-25 11:22:26 +01:00
Michael Grant
e5bcf59768
Clear text beneath SIXEL image placements.
2026-08-25 11:22:26 +01:00
Michael Grant
69ee9cf7f4
Ordinary text writes replaced the entire grid cell, dropping GRID_FLAG_IMAGE and releasing the
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mage reference. Deferred pane redraws explain the intermittent “image never appears” behavior.
Fixed:
- Preserves image metadata while updating the text underlay in the collected ASCII path: grid.c:779
- Handles the single-cell/non-ASCII path and schedules an image redraw: screen-write.c:2631
- Uses the requested if/else for new_id.
- Adds a deterministic regression reproducing point (2): regress/image-support.sh:240
This matches Kitty’s requirement that normal text operations must not affect graphics; graphics require
explicit deletion. Kitty graphics protocol
2026-08-25 11:22:26 +01:00
Michael Grant
ae0fa8068c
Preserve Kitty image crop width after cell rounding.
2026-08-25 11:22:26 +01:00
Michael Grant
3442c1f26f
Fix underlay bookkeeping bug.
2026-08-25 11:22:26 +01:00
Michael Grant
b6c709307e
Dither alpha in SIXEL output
2026-08-25 11:22:26 +01:00
Michael Grant
002d38cb6b
Revert "Clear text beneath graphical images"
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This reverts commit fb589fd9f9
2026-08-25 11:22:26 +01:00
Michael Grant
fb931f1676
Use compact image references in grid cells
2026-08-25 11:22:26 +01:00
Michael Grant
ba2dc2cfb6
Clear text beneath graphical images
2026-08-25 11:22:26 +01:00
Michael Grant
628acfd802
Pass through wrapped Kitty graphics
2026-08-25 11:22:26 +01:00
Michael Grant
95b6adbd61
Simplify image support terminology
2026-08-25 11:22:26 +01:00
Michael Grant
0b2739c62c
Use one image support switch
2026-08-25 11:22:26 +01:00
Michael Grant
596de59d11
Make image types opaque
2026-08-25 11:22:26 +01:00
Michael Grant
7d2d187db4
Inline basic image fallback renderer
2026-08-25 11:22:26 +01:00
Michael Grant
674cdd94f5
Add bptato's test to the regression test script.
2026-08-25 11:22:26 +01:00
Michael Grant
75b606c3df
The two Chawan symptoms now have matching fixes:
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- Layout corruption: C=1 is respected.
- Lingering remnants: tmux now tracks Kitty’s (image ID, placement ID) identity, replaces moved placements, and honors
placement-specific d=i,...,p=... deletion.
2026-08-25 11:22:26 +01:00
Michael Grant
d674f34f25
Support Kitty Unicode placeholder image transmission
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- Parse Kitty graphics commands wrapped in tmux passthrough sequences.
- Accept unpadded base64 payloads emitted by icat.
- Handle chunked transfers whose final chunk omits m.
- Track virtual image placements.
- Convert Unicode placeholders into shared image cells for Kitty and SIXEL clients.
- Add regression coverage for wrapped, chunked, unpadded input.
2026-08-25 11:22:26 +01:00
Michael Grant
8b44703b41
Fix SIXEL median-cut palette generation
2026-08-25 11:22:26 +01:00
Michael Grant
c0ab9b7b3f
Revert "Removed unconditional Floyd–Steinberg dithering from image-sixel.c:1077. Kitty images now use the adaptive 256-colour median-cut palette with direct nearest-colour mapping."
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This reverts commit ab591ae430
2026-08-25 11:22:26 +01:00
Michael Grant
f81c41929b
Fix kitty image resize issue when the kitty image resized smaller than the image, the image was overflowing lines and banding.
2026-08-25 11:22:26 +01:00
Michael Grant
cc4a76d0be
Removed unconditional Floyd–Steinberg dithering from image-sixel.c:1077. Kitty images now use the adaptive 256-colour median-cut palette with direct nearest-colour mapping.
2026-08-25 11:22:26 +01:00
Michael Grant
52e2e2b0c0
C=1 is parsed and stored as an image-placement flag, suppressing cursor movement and scrolling as required by the Kitty protocol.
2026-08-25 11:22:26 +01:00
Michael Grant
e602dfa771
Keep SIXEL palettes across redraw spans
2026-08-25 11:22:26 +01:00
Michael Grant
5fc24e373a
Rename image damage functions to redraw
2026-08-25 11:22:26 +01:00
Michael Grant
a4d6004d40
Correct image copyrights
2026-08-25 11:22:26 +01:00
Michael Grant
260cde9f48
Remove obsolete Kitty diacritics comment
2026-08-25 11:22:26 +01:00
Michael Grant
c8fe307682
Support Kitty source rectangle placements
2026-08-25 11:22:26 +01:00
Michael Grant
2c7a5f73c4
Improve SIXEL colour quantization
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Build an adaptive 256-colour palette with median cut instead of using a fixed colour cube. Apply Floyd-Steinberg error diffusion while mapping pixels to reduce banding and preserve image detail.
2026-08-25 11:22:26 +01:00
Michael Grant
643bb662a0
Preserve SIXEL pixel dimensions
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Retain the padded canonical pixel canvas separately from the image content. Scale only the populated portion of partial edge cells so an image keeps its exact raster size on the originating terminal while retaining its cell footprint.
2026-08-25 11:22:26 +01:00
Michael Grant
9731adb300
Correct SIXEL HLS colour conversion
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Use the DEC hue origin and channel order, and round percentage and HLS conversions to the nearest byte value.
2026-08-25 11:22:26 +01:00
