Skip to content

Add support for variable size rect packets #36

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
AndrewJRichardson wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Add support for variable size rect packets #36

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
44 changes: 37 additions & 7 deletions js/parser.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ export class Parser {
_buffer = new Uint8Array(512);
_i = 0;
_renderer;
_r = 0; // Variable length rect packets requires storing the last colour used
_g = 0;
_b = 0;

constructor(renderer) {
this._renderer = renderer;
Expand All @@ -20,16 +23,43 @@ export class Parser {
_processFrame(frame) {
switch (frame[0]) {
case 0xfe:
if (frame.length === 12) {
// Packets can be missing size and/or colour info.
// If colour is missing use the last rect colour values.
if (frame.length >= 5 && frame.length <= 12) {
let w = 1;
let h = 1;
switch(frame.length) {
case 5: // No Size, no colour
break;
case 8: // No size, colour
this._r = frame[9];
this._g = frame[10];
this._b = frame[11];
break;
case 9: // Size, no colour
w = frame[5] + frame[6] * 256;
h = frame[7] + frame[8] * 256;
break;
case 12: // Size, colour
w = frame[5] + frame[6] * 256;
h = frame[7] + frame[8] * 256;
this._r = frame[9];
this._g = frame[10];
this._b = frame[11];
break;
default:
console.log('Bad RECT frame');
return;
}
this._renderer.drawRect(
frame[1] + frame[2] * 256,
frame[3] + frame[4] * 256,
frame[5] + frame[6] * 256,
frame[7] + frame[8] * 256,
frame[9],
frame[10],
frame[11]);

w,
h,
this._r,
this._g,
this._b)
break;
} else {
console.log('Bad RECT frame');
}
Expand Down