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Mon 21 Jul 22:43:21 CEST 2025

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sbosse 2025-07-21 23:04:05 +02:00
parent fc5a28f116
commit 7a367b2832
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js/x11/examples/png/test1.js Normal file
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//var logo = require('./node-png').readPng('./node-logo.png');
var fs = require('fs');
var Decoder = require('./png-decoder');
var decoder = new Decoder();
var logo = {
data : Buffer.from(decoder.parse(fs.readFileSync('./screen.png'))),
width : decoder._IHDR.width,
height : decoder._IHDR.height
};
var x11 = require('../../lib');
var Exposure = x11.eventMask.Exposure;
x11.createClient(function(err, display)
{
var X = display.client;
X.require('render', function(err, Render) {
var root = display.screen[0].root;
main(root, X, Render, display);
});
});
function main(root, X, Render, display) {
var win, picWin, pic, gc;
win = X.AllocID();
X.CreateWindow(
win, root,
0, 0, logo.width, logo.height,
0, 0, 0, 0,
{ eventMask: Exposure }
);
X.MapWindow(win);
gc = X.AllocID();
X.CreateGC(gc, win);
var logoPixmap = X.AllocID();
X.CreatePixmap(logoPixmap, win, 24, logo.width, logo.height);
var rscreen = display.screen[0];
var screen =
rscreen.depths[rscreen.root_depth][
Object.keys(rscreen.depths[rscreen.root_depth])[0]];
var rmask = parseInt(screen.red_mask, 10);
var gmask = parseInt(screen.green_mask, 10);
var bmask = parseInt(screen.blue_mask, 10);
for (var y = 0; y < logo.height; y++) {
for (var x = 0; x < logo.width; x++) {
var pixel = Buffer.from([
logo.data[(x + logo.width * y) * 4],
logo.data[(x + logo.width * y) * 4 + 1],
logo.data[(x + logo.width * y) * 4 + 2], 0]).readInt32LE();
logo.data[(x + logo.width * y) * 4 ] = (pixel & rmask) >> 16;
logo.data[(x + logo.width * y) * 4 + 1] = (pixel & gmask) >> 8;
logo.data[(x + logo.width * y) * 4 + 2] = (pixel & bmask) >> 0;
logo.data[(x + logo.width * y) * 4 + 3] = 0x00;
}
}
X.PutImage(2, logoPixmap, gc, logo.width, logo.height, 0, 0, 0, 24, logo.data);
var logoPicture = X.AllocID();
Render.CreatePicture(logoPicture, logoPixmap, Render.rgb24);
var winPicture = X.AllocID();
Render.CreatePicture(winPicture, win, Render.rgb24);
X.on('event', function(ev) {
if (ev.name == 'Expose') {
Render.Composite(3, logoPicture, 0, winPicture, 0, 0, 0, 0, 0, 0, logo.width, logo.height);
}
});
}