ENGO150/FabrikaHradekTour
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optimized drawing the image

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This commit is contained in:
Václav Šmejkal 2023-05-16 15:15:23 +02:00
parent b895548bda
commit d03e9d5519
Signed by: ENGO150
GPG Key ID: F6D6DF86242C5A59
1 changed files with 7 additions and 9 deletions
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16
res/script.js
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@ -1,17 +1,15 @@
function load_panorama() function load_panorama()
{ {
console.log(window.width); let ctx = document.getElementById('panorama').getContext('2d');
var ctx = document.getElementById('panorama').getContext('2d'); let img = new Image();
var img = new Image(); const width = 5000;
var width_buffer;
ctx.canvas.width = width;
ctx.canvas.height = width / 2;
img.onload = function() img.onload = function()
{ {
width_buffer = 5000; ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, width, width / 2);
ctx.canvas.width=width_buffer;
ctx.canvas.height=width_buffer / 2;
ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, width_buffer, width_buffer / 2);
}; };
img.src = './res/img/test.jpg'; img.src = './res/img/test.jpg';