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[kitty] use zlib if libdeflate is unavailable #2423

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nick black 2021-12-14 00:47:48 -05:00
parent b3710c0cf1
commit 61ef2f5ee4
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1 changed files with 27 additions and 0 deletions
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src/lib/kitty.c
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@ -2,6 +2,8 @@
#include "base64.h"
#ifdef USE_DEFLATE
#include <libdeflate.h>
#else
#include <zlib.h>
#endif
// Kitty has its own bitmap graphics protocol, rather superior to DEC Sixel.
@ -647,6 +649,31 @@ deflate_buf(void* buf, fbuf* f, int dimy, int dimx){
clen = libdeflate_zlib_compress(cmp, buf, blen, cbuf, blen);
}
libdeflate_free_compressor(cmp);
#else
z_stream zctx = {0};
int z = deflateInit(&zctx, 2);
if(z != Z_OK){
logerror("couldn't get zlib context\n");
return -1;
}
clen = deflateBound(&zctx, blen);
cbuf = malloc(clen);
if(cbuf == NULL){
logerror("couldn't allocate %" PRIuPTR "B\n", clen);
deflateEnd(&zctx);
return -1;
}
zctx.avail_out = clen;
zctx.next_out = cbuf;
zctx.next_in = buf;
zctx.avail_in = blen;
z = deflate(&zctx, Z_FINISH);
if(z != Z_STREAM_END){
logerror("error %d deflating %" PRIuPTR "B -> %" PRIuPTR "B\n", z, blen, clen);
deflateEnd(&zctx);
return -1;
}
deflateEnd(&zctx);
#endif
int ret;
if(0 == clen){ // wasn't enough room; compressed data is larger than original