Canvas implementation, desktop application 2016/07/11, 17:08:20
The latest commit includes a canvas implementation and the first steps for an actual desktop.
A canvas component is needed to allow applications to freely draw on a buffer in memory, which is usually only done by window server. The use case for this canvas is for example drawing a task-bar from within the desktop application or providing a space to draw images from client-side. It will also be the basis for other user-drawn components.
Unlike other UI components, the content of a canvas is entirely rendered by the component creator instead of the server. The implementation for this is done with a combination of shared memory and messaging. The client requests creation of a canvas component just as with any other component, and the window server notifies the client with events when the buffer has been allocated.
The most challenging issue with a shared memory buffer is avoiding the client application to cause faulty memory accesses when the buffer needs to be resized (i.e. after relayouting). This is now solved by simply retaining the previous buffer until the client application sends an _acknowledge message_ to the window server. This consumes more memory until the buffer is acknowledged but improves stability. A nice little discussion on this topic was led in the OSDev forums.
Comments
Write a comment...According Cause Insomnia <a href=https://buycialis.buzz>buy cialis online canadian pharmacy</a> The ICER was not statistically significant between the treatment strategies and similar results were found with all perspectives
Vaginal discharge typically is increased in amount because of higher estrogen levels and greater vaginal blood flow <a href=http://buycialis.boats>cialis</a>
<a href=https://propecia.bond>does propecia work</a> 25 NaH 2 PO 4, 10 glucose, 75 sucrose, 0
Patients undergoing laparotomy, laparoscopy, or thoracotomy lasting greater than 30 minutes should receive pharmacologic thromboprophylaxis with either low dose UFH or LMWH unless contraindicated because of a high risk of bleeding or active bleeding <a href=http://aviagra.best>viagra recommended dose</a> The groups not administered drugs were injected with an equal volume of the corresponding vehicle in the same manner
<a href=http://priligy.bond>priligy india</a> Because the Centor criteria have a low positive predictive value for determining the presence of group A streptococcal infection, the IDSA suggests that they can be used to identify patients who have a low probability of group A streptococcal pharyngitis and do not warrant further testing 13
Cre mediated incomplete recombination results in partial read through transcription <a href=https://accutane.buzz>whats accutane</a>
Another 84 million are prediabetic, and without intervention, up to 70 of these individuals may progress to type 2 diabetes <a href=https://nolvadex.pics>tamoxifen side effects in the elderly</a> Moreover, DENV induces AMPK kinase activity, which prohibits mTORC1, and this modulation is crucial for virus induced lipophagy Fig
<a href=https://stromectol.one>buy stromectol pills</a> Lucky BSNYDlnbYXhbVyX 5 29 2022
Role of interleukin 8 in uterine natural killer cell regulation of extravillous trophoblast cell invasion <a href=https://lasix.mom>what is lasix for horses</a>
A Schematic of the protocols showing the startle alone in continuous broadband noise left and the startle preceded by a silent gap right of varying lengths ending 50 ms before the startle stimulus <a href=https://propecia.bond>finasteride with free viagra</a>
Clomid can cause side effects such as hot flashes, visual disturbances, nausea and bloating <a href=https://zithromax.top>zithromax bronchitis</a> Serious Use Alternative 1 protriptyline and fluconazole both increase QTc interval
Feng Die looked at Rogge, she felt more and more natural alternative to lasix that this divine envoy was a mixture of angel and demon <a href=http://nolvadex.pics>buy nolvadex</a>
In these experiments, we characterize the Wnt ОІ catenin pathway in each of the tumors <a href=https://nolvadex.buzz>clomid or nolvadex for pct</a>
<a href=https://propecia.hair>propecia costco</a> Schwarz Pharma Inc
The FDA has approved its use to delay breast cancer so it can be prescribed for any patient at increased risk for breast cancer <a href=https://clomid.mom/>buy clomid</a>
<a href=http://lasix.autos/>lasix for pulmonary edema</a> Hence, the items on the list are meant as evidence based advisories to our colleagues in clinical oncology, with the suggestion that the recommendations represent an opportunity for in depth discussions with the patient and individualized treatment planning
<a href=http://nolvadex.one/>nolva tamoxifen</a> Pretty much the same
Cancer Epidemiol Biomarkers Prev 5 961 965 <a href=https://stromectol.autos/>ivermectin cost</a> PubMed 33340904
Schally AV, Kastin AJ, Arimura A. <a href=https://tamoxifenolvadex.com/>nolvadex pct where to buy</a> Both in BRCA1 mutation carriers HR 1.
Silently observing the surrounding environment, Emperor Liu commented buy cialis online united states This place Zhao Puxuan is very ordinary Looking at Liu Yang, who was following him, Emperor Liu Make Your Penis Huge how to cope with erectile dysfunction asked, Do you think that I am too polite to Zhao Pu when I personally come to visit Zhao Pu and bring you, the prince Hearing the question, buy cialis online united states Liu Yang returned to his senses, best lube for erectile dysfunction shook his head and said, Father treats ministers with courtesy, and this is to show the world that you value the wise men <a href=http://buypriligyo.com/>generic priligy online</a>
<a href=http://iverstromectol.com/>ivermectin for rosacea</a> Zithromax Weekly
[url=http://buycialikonline.com]purchase cialis online[/url] Order Doxycycline Hyclate
This is one of best hobbyst OS design that I've ever meet
Thumbs up. Thanks for this ongoing project. Looks awesome!
Thanks for the support! Appreciate it a lot!