othmane/ohif-viewer
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Improving viewer performance with static images on thumbnails

Browse Source
This commit is contained in:
Bruno Alves de Faria 2017-11-22 15:38:09 -02:00
parent 04e188df3d
commit b51c01ca7a
1 changed files with 20 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
Packages/ohif-viewerbase/client/components/studyBrowser/imageThumbnail/imageThumbnail.js
View File

@ -42,8 +42,8 @@ Template.imageThumbnail.onRendered(() => {
return; return;
} }
// Disable cornerstone for thumbnail element and remove its canvas // Remove previously generated static images
cornerstone.disable(element); $element.find('.static-image').remove();
// Enable cornerstone for thumbnail element again creating a new canvas // Enable cornerstone for thumbnail element again creating a new canvas
cornerstone.enable(element, { renderer: '' }); cornerstone.enable(element, { renderer: '' });
@ -55,13 +55,29 @@ Template.imageThumbnail.onRendered(() => {
const loadSuccess = image => { const loadSuccess = image => {
// Check to make sure the element is enabled. // Check to make sure the element is enabled.
try { try {
var enabledElement = cornerstone.getEnabledElement(element); cornerstone.getEnabledElement(element);
} catch(error) { } catch(error) {
return; return;
} }
cornerstone.displayImage(element, image); cornerstone.displayImage(element, image);
$loading.css('display', 'none');
$element.one('CornerstoneImageRendered', () => {
const enabledElement = cornerstone.getEnabledElement(element);
// Create a static image from
const imageElement = document.createElement('img');
imageElement.classList.add('static-image');
const dataUrl = enabledElement.canvas.toDataURL('image/jpeg', 1);
imageElement.src = dataUrl;
// Disable cornerstone for thumbnail element and remove its canvas
cornerstone.disable(element);
$element.append(imageElement);
$loading.css('display', 'none');
});
}; };
// Define a handler for error on image load // Define a handler for error on image load