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canvasã«é–¢ã™ã‚‹mizdraã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (10)

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DOMDOMã‚¿ã‚¤ãƒ ã‚¹#15: canvas-based renderingã¨a11yã€‚ã„ã¾ã€ãã—ã¦ã“ã‚Œã‹ã‚‰
DOMDOMã‚¿ã‚¤ãƒ ã‚¹#15: canvas-based renderingã¨a11yã€‚ã„ã¾ã€ãã—ã¦ã“ã‚Œã‹ã‚‰ ã¯ã„ã€DOMDOMã‚¿ã‚¤ãƒ ã‚¹ã§ã™ã€‚çŸ¥ã£ã¦ã‚‹ã‚ˆã£ã¦ï¼Ÿã“ã®æŒ¨æ‹¶ã¯ã€ã¾ã‚æº–å‚™ä½“æ“ã¿ãŸã„ãªã‚‚ã®ãªã®ã§ã€‚ã„ã¤ã ã£ã¦æ¬ ã‹ã•ãšã‚„ã£ã¦ã„ãã¾ã™ðŸ‘¶ ã•ã¦ã€ä»Šæ—¥ã¯canvas-based renderingã¨a11yã®è©±ã§ã™ã€‚ã“ã®å‰ã®JSConfã‚»ãƒƒã‚·ãƒ§ãƒ³ã®æœ€å¾Œã®ã‚ãŸã‚Šã§è©±ã—ãŸã“ã¨ã¨é‡è¤‡ãŒå¤§ãã„ã§ã™ãŒã€é¢ç™½ãŒã£ã¦ãã‚Œã‚‹æ–¹ãŒå¤šã‹ã£ãŸã®ã§æ–‡ç« ã«ã—ã¦ãŠã“ã†ã¨æ€ã„ã¾ã—ãŸã€‚ (ä¸€å¿œJSConfã‚»ãƒƒã‚·ãƒ§ãƒ³ã®è³‡æ–™ã¸ã®ãƒªãƒ³ã‚¯ã‚‚è¼‰ã›ã¦ãŠãã¾ã™ã) canvas-based renderingã®æ³¢ canvas-based renderingã¨ã„ã†è¨€è‘‰ã¯ã€ã“ã®è¨˜äº‹ã§ã¯ã€Œcanvasã‚’ã‚´ãƒªã‚´ãƒªã«ä½¿ã£ã¦webã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã‚’ãƒ¬ãƒ³ãƒ€ãƒªãƒ³ã‚°ã™ã‚‹ã“ã¨ã€ã£ã¦ãã‚‰ã„ã®æ„å‘³ã§ä½¿ã„ã¾ã™ã€‚é€šå¸¸ã®formè¦ç´ ã‚„divè¦ç´ ã§ã¯ãªãã¦ã€canvasè¦ç´
mizdra 2023/12/07
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canvas

accessibility
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Total Canvas Memory Use Exceeds The Maximum Limit
mizdra 2023/07/19
canvas

memory

browser
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ã‚ãƒ£ãƒ³ãƒã‚¹ã®æœ€é©åŒ– - Web API | MDN
Â« å‰ã®ãƒšãƒ¼ã‚¸ æ¬¡ã®ãƒšãƒ¼ã‚¸ Â» <canvas> è¦ç´ ã¯ã€ã‚¦ã‚§ãƒ–ã§ 2 æ¬¡å…ƒã‚°ãƒ©ãƒ•ã‚£ãƒƒã‚¯ã‚’æç”»ã™ã‚‹ãŸã‚ã«ã‚‚ã£ã¨ã‚‚åºƒãä½¿ç”¨ã•ã‚Œã¦ã„ã‚‹ãƒ„ãƒ¼ãƒ«ã®ã²ã¨ã¤ã§ã™ã€‚ã—ã‹ã—ã€ã‚¦ã‚§ãƒ–ã‚µã‚¤ãƒˆã‚„ã‚¢ãƒ—ãƒªãŒã‚ãƒ£ãƒ³ãƒã‚¹ API ã®é™ç•Œä»˜è¿‘ã¾ã§ä½¿ç”¨ã™ã‚‹ã‚ˆã†ã«ãªã£ã¦ã€ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãŒæ‚ªåŒ–ã™ã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ã“ã®è¨˜äº‹ã§ã¯ã€ã‚ãƒ£ãƒ³ãƒã‚¹è¦ç´ ã®ä½¿ç”¨ã‚’æœ€é©åŒ–ã—ã¦ã€ã‚°ãƒ©ãƒ•ã‚£ãƒƒã‚¯ã‚’ç¢ºå®Ÿã«æ”¹å–„ã™ã‚‹ãŸã‚ã®ææ¡ˆã‚’è¡Œã„ã¾ã™ã€‚
mizdra 2022/12/14
canvas

performance

browser
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JavaScriptã§ä»»æ„ã®HTMLè¦ç´ ã‚’Picture-in-Pictureã™ã‚‹
ã¿ãªã•ã‚“ã¯Picture-in-Picture(PiP)ã¨ã„ã†æ©Ÿèƒ½ã‚’ä½¿ã£ãŸã“ã¨ãŒã‚ã‚Šã¾ã™ã‹ã€‚PiPã¯å‹•ç”»ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ãªã©ã‚’æµ®éŠã™ã‚‹å°çª“ã«è¡¨ç¤ºã™ã‚‹æ©Ÿèƒ½ã§ã™ã€‚å°çª“ã¯ã‚¦ã‚£ãƒ³ãƒ‰ã‚¦ã®å¤–å´ã‚’è‡ªç”±ã«ç§»å‹•ã§ãã¾ã™ã€‚ ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—ãŒè³‘ã‚„ã‹ã«ãªã‚ŠãŒã¡ãªPCã§ã‚‚PiPã¯å¤§æ´»èºãªã®ã§ã™ãŒã€ç‰¹ã«ã‚¹ãƒžãƒ¼ãƒˆãƒ•ã‚©ãƒ³ã«ãŠã„ã¦ã¯æ•°å°‘ãªã„ã€Œã‚¦ã‚£ãƒ³ãƒ‰ã‚¦ã€æ©Ÿèƒ½ã«ãªã‚Šã¾ã™ã€‚Androidã¯ã‚‚ã¡ã‚ã‚“ã€iOS14ã‚‚å¯¾å¿œã—ãŸã“ã¨ã§è©±é¡Œã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã‚Œã«ã‚ˆã£ã¦ã‚¹ãƒžãƒ›ä¸€å°ã‚ã‚Œã°ã€ã‚½ã‚·ãƒ£ã‚²ã®å…¬å¼ç”Ÿæ”¾é€ã‚’è¦‹ãªãŒã‚‰ã‚½ã‚·ãƒ£ã‚²ã®ã‚¤ãƒ™ãƒ³ãƒˆã‚’å‘¨å›žã™ã‚‹åœ°ç„ã®ã‚ˆã†ãªè¡Œç‚ºãŒå¯èƒ½ã«ãªã‚Šã¾ã—ãŸã€‚ åˆ©ç”¨è€…ã¨ã„ã†è¦–ç‚¹ã‹ã‚‰è¦‹ã‚‹ã¨éžå¸¸ã«ä¾¿åˆ©ãªã®ã§ã™ãŒã€é–‹ç™ºè€…ã‹ã‚‰è¦‹ã‚‹ã¨å‹•ç”»ã—ã‹è¡¨ç¤ºã§ããªã„ã®ã¯ãªã‹ãªã‹ä½¿ã„æ‰€ãŒé›£ã—ããªã‚Šã¾ã™ã€‚ãã“ã§ã€ã“ã®æ©Ÿèƒ½ã‚’ä½¿ã£ã¦å¥½ããªæƒ…å ±ã‚’è¡¨ç¤ºã§ããªã„ã‹å®Ÿé¨“ã—ã¦ã¿ã¾ã—ãŸã€‚ PiPæ©Ÿèƒ½ã®å¯¾å¿œç’°å¢ƒ Chrome 70 Firefox 71ï¼ˆåˆ¶é™ä»˜ãï¼‰ mac
mizdra 2021/04/30
video ã—ã‹æµã›ãªã„ã¯ãšãªã®ã«ã©ã†ã‚„ã£ã¦ã‚„ã‚‹ã®ã‹ãªã€œã¨æ€ã£ãŸã‚‰æƒ³åƒä»¥ä¸Šã«å¯Œè±ªçš„ãªæ‰‹æ³•ã§ã®ã‚´ãƒªæŠ¼ã—ã§é¢ç™½ã‹ã£ãŸã€‚ã™ã”ã„ã€‚

browser

javascript

canvas
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Tighter limit for canvas memory use on iOS Â· WebKit/webkit@5d5b478 Â· GitHub
Tighter limit for canvas memory use on iOS https://bugs.webkit.org/show_bug.cgi?id=187279 <rdar://probl em/38420562> Reviewed by Simon Fraser. Source/WebCore: We allowed 448MB of canvas buffer memory. This is still too much in some cases. Painting a large canvas may also requires several other temporary canvas sized buffers getting us easily over the process size limit. * html/HTMLCanvasElement.cpp
mizdra 2020/08/18
canvas

memory
ãƒªãƒ³ã‚¯
Is there any reason for using WebGL instead of 2D Canvas for 2D games/apps?
mizdra 2020/08/11
2Dã®æç”»ã«ãŠã„ã¦Canvas 2Dã®ä»£ã‚ã‚Šã«WebGLã‚’ä½¿ã†åˆ©ç‚¹ã¯ä½•ã‹ã¨ã„ã†è©±

canvas

webgl

web
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OffscreenCanvasâ€”speed up your canvas operations with a web worker Â |Â Articles Â |Â web.dev
OffscreenCanvasâ€”speed up your canvas operations with a web worker Stay organized with collections Save and categorize content based on your preferences. Canvas is a popular way of drawing all kinds of graphics on the screen and an entry point to the world of WebGL. It can be used to draw shapes, images, run animations, or even display and process video content. It is often used to create beautiful
mizdra 2020/07/25
canvas

performance

javascript
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Pixel-perfect rendering with devicePixelContentBox Â |Â Articles Â |Â web.dev
It has 3440 pixels in width and the display area is 79cm wide. That leads to a resolution of 110 DPI. Close to 96, but not quite. That is also the reason why a <div style="width: 1cm; height: 1cm"> will not exactly measure 1cm in size on most displays. Finally, dPR can also be affected by your browser's zoom feature. If you zoom in, the browser increases the reported dPR, causing everything to ren
mizdra 2020/07/10
canvas

image

html

javascript
ãƒªãƒ³ã‚¯
Slow Code HATES him! Optimising a web app from 1 to 60fps
Slow Code HATES him! Optimising a web app from 1 to 60fps This post explores my experience optimising a web app through iterative improvement. The app uses Svelte, but you donâ€™t need any prior experience, and most of what I discuss applies to any web app. It follows on from Embrace your Obsessions! so if you want to learn more about Minesweeper and the context of this post, give it a read. After m
mizdra 2020/03/21
performance

canvas

javascript

css

browser
ãƒªãƒ³ã‚¯
Fabric.js Javascript Canvas Library
Fabric.js is a powerful and simple Javascript HTML5 canvas library Fabric provides interactive object model on top of canvas element Fabric also has SVG-to-canvas (and canvas-to-SVG) parser Using Fabric.js, you can create and populate objects on canvas; objects like simple geometrical shapes
mizdra 2017/06/28
SVG

canvas

javascript
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