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Function to output RGBA image as KGP escape codes for debugging

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Fixes #9557
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copilot-swe-agent[bot] 2026-02-25 04:07:24 +00:00 • committed by Kovid Goyal
parent a1927eb662
commit 64fb99b4ef
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kitty/print-graphics.h Normal file
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/*
* Copyright (C) 2026 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
#pragma once
#include <stdint.h>
#include <stdio.h>
#include <stdbool.h>
#include "base64.h"
// Write the kitty graphics protocol escape codes for a 32-bit RGBA raster image to fp.
static inline void
fprint_rgba32(FILE *fp, const uint32_t *rgba, uint32_t width, uint32_t height) {
const uint8_t *data = (const uint8_t *)rgba;
const size_t total_bytes = (size_t)width * height * 4;
unsigned char b64_buf[4096];
size_t offset = 0;
bool first = true;
while (offset < total_bytes) {
size_t chunk = total_bytes - offset;
if (chunk > 3072) chunk = 3072;
size_t b64_len = sizeof(b64_buf);
base64_encode8(data + offset, chunk, b64_buf, &b64_len, false);
offset += chunk;
const bool last = (offset >= total_bytes);
if (first) {
fprintf(fp, "\x1b_Ga=T,f=32,s=%u,v=%u,m=%d;", width, height, last ? 0 : 1);
first = false;
} else fprintf(fp, "\x1b_Gm=%d;", last ? 0 : 1);
fwrite(b64_buf, 1, b64_len, fp);
fputs("\x1b\\", fp);
}
}
static inline void
print_rgba32(const uint32_t *rgba, uint32_t width, uint32_t height) { fprint_rgba32(stdout, rgba, width, height); }