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Auto-grow the map save buffer when necessary; do less slicing

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This commit is contained in:
Eevee (Evelyn Woods) 2020-12-13 16:09:04 -07:00
parent 5e6784c235
commit df14b62b94
1 changed files with 15 additions and 8 deletions
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23
js/format-c2g.js
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@ -1229,8 +1229,7 @@ function compress(buf) {
return null;
}
}
// FIXME don't love this slice
return outbytes.buffer.slice(0, q);
return outbytes.subarray(0, q);
}
class C2M {
@ -1323,14 +1322,23 @@ export function synthesize_level(stored_level) {
c2m.add_section('LXCM', bytes.buffer);
}
// FIXME well this will not do
let map_bytes = new Uint8Array(4096);
let map_bytes = new Uint8Array(1024);
let map_view = new DataView(map_bytes.buffer);
map_bytes[0] = stored_level.size_x;
map_bytes[1] = stored_level.size_y;
let hints = [];
let p = 2;
for (let cell of stored_level.linear_cells) {
// If we're in danger of running out of room in our buffer, add another kilobyte and copy
if (p >= map_bytes.length - 64) {
let new_bytes = new Uint8Array(map_bytes.length + 1024);
for (let i = 0; i < map_bytes.length; i++) {
new_bytes[i] = map_bytes[i];
}
map_bytes = new_bytes;
map_view = new DataView(map_bytes.buffer);
}
// TODO complain if duplicates on a layer
let dummy_terrain_tile = null;
for (let i = cell.length - 1; i >= 0; i--) {
@ -1398,6 +1406,7 @@ export function synthesize_level(stored_level) {
// TODO assert that the bottom tile has no next, and all the others do
}
}
map_bytes = map_bytes.subarray(0, p);
// Collect hints first so we can put them in the comment field
// FIXME this does not respect global hint, but then, neither does the editor.
@ -1406,14 +1415,12 @@ export function synthesize_level(stored_level) {
hints.unshift('');
c2m.add_section('NOTE', hints.join('\n[CLUE]\n'));
// FIXME ack, ArrayBuffer.slice makes a copy actually! and i use it a lot in this file i think!!
let map_buf = map_bytes.buffer.slice(0, p);
let compressed_map = compress(map_buf);
let compressed_map = compress(map_bytes);
if (compressed_map) {
c2m.add_section('PACK', compressed_map);
}
else {
c2m.add_section('MAP ', map_buf);
c2m.add_section('MAP ', map_bytes);
}
c2m.add_section('END ', '');