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Fix image aspect ratio by querying terminal cell size

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- Add getCellDimensions/setCellDimensions to terminal-image.ts
- TUI queries cell size on startup via CSI 16 t
- Parse response and filter it from user input
- Invalidate and re-render when cell dimensions received
- Pass rows parameter to Kitty protocol for correct aspect ratio
This commit is contained in:
Mario Zechner 2025-12-13 23:09:05 +01:00
parent fcad447f32
commit 215c10664a
3 changed files with 93 additions and 9 deletions
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16
packages/tui/src/terminal-image.ts
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@ -24,6 +24,17 @@ export interface ImageRenderOptions {
let cachedCapabilities: TerminalCapabilities | null = null;
// Default cell dimensions - updated by TUI when terminal responds to query
let cellDimensions: CellDimensions = { widthPx: 9, heightPx: 18 };
export function getCellDimensions(): CellDimensions {
return cellDimensions;
}
export function setCellDimensions(dims: CellDimensions): void {
cellDimensions = dims;
}
export function detectCapabilities(): TerminalCapabilities {
const termProgram = process.env.TERM_PROGRAM?.toLowerCase() || "";
const term = process.env.TERM?.toLowerCase() || "";
@ -307,11 +318,10 @@ export function renderImage(
}
const maxWidth = options.maxWidthCells ?? 80;
const cellDims: CellDimensions = { widthPx: 9, heightPx: 18 };
const rows = calculateImageRows(imageDimensions, maxWidth, cellDims);
const rows = calculateImageRows(imageDimensions, maxWidth, getCellDimensions());
if (caps.images === "kitty") {
const sequence = encodeKitty(base64Data, { columns: maxWidth });
const sequence = encodeKitty(base64Data, { columns: maxWidth, rows });
return { sequence, rows };
}