rendering-engine

What are the most web-capable mobile phones to date (models and / or user agents) and What rules should be assessed when trying to determine if they will handle a rich mobile-customised site? I am developing a mobile website and currently doing some user agent detection to determine if the mobile device should see a fully enhanced js, jquery mobile, css view, or plain a fallback one. Here is what I currently have for my two questions, and I would like some input / suggestions on how this can be improved - this filtering is assessed top-to-bottom: Enhanced view if the user agent contains the

I read a book calls 'Professional Javascript For Web Developers 2nd edition' and it state that this code can detect browser rendering engine: <script type="text/javascript"> var client = function(){ var engine = { ie: 0, gecko: 0, webkit: 0, khtml: 0, opera: 0, ver: null }; return { engine : engine }; }(); if(client.engine.ie){ alert("This is internet explorer"); }else if(client.engine.gecko > 1.5){ if(client.engine.ver == "1.8.1"){ alert("This is gecko rendering browser"); } }else if(client.engine.webkit){ alert("This is web kit"); }else if(client.engine.khtml){ alert("This is khtml"); }else{

I'm coding a small rendering engine with GLSL shaders: Each Mesh (well, submesh) has a number of vertex streams (eg. position,normal,texture,tangent,etc) into one big VBO and a MaterialID. Each Material has a set of textures and properties (eg. specular-color, diffuse-color, color-texture, normal-map,etc) Then I have a GLSL shader, with it's uniforms and attributes. Let's say: uniform vec3 DiffuseColor; uniform sampler2D NormalMapTexture; attribute vec3 Position; attribute vec2 TexCoord; I'm a little bit stuck in trying to design a way for the GLSL shader to define the stream mappings

Is it worth worrying about CSS rendering performance? Or should we just not worry about efficiency at all with CSS and just focus on writing elegant or maintainable CSS instead? This question is intended to be a useful resource for front-end developers on which parts of CSS can actually have a significant impact on device performance, and which devices / browsers or engines may be affected. This is not a question about how to write elegant or maintainable CSS, it's purely about performance (although hopefully what's written here can inform more general articles on best-practice). Existing