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2014/10/15 ¤U¤È 10:13:17
iphone Programming Glossary: renderingHow to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone not created Draw the image to the bitmap context. The memory allocated for the context for rendering will then contain the raw image pixelData in the specified color space. CGRect rect 0 0 self.size.width..
http://stackoverflow.com/questions/2711297/underline-text-in-uilabel of string I find some people suggest UIWebView but it is obviously too heave a class for just text rendering. My thoughts was to figure out the start point and length of each string in each line. And draw a line..
Can I embed a custom font in an iPhone application? http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application a custom font in an iPhone application I would like to have an app include a custom font for rendering text load it and then use it with standard UIKit elements like UILabel. Is this possible I found these..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting a whole new level of headache. Still private. CoreText Framework Since iOS 3.2 a very very good rendering engine. But that's it. Can directly layout and render NSAttributesString s. However there is no user.. text selection no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints a significant Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF.. usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer.. a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer rendering kicks in once the scale is 1. iBooks takes a similar double take approach as if you scroll the pages..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour OpenGL rendering breaks UIScrollView behaviour There are a few similar questions out there on SO links at end but none.. on SO links at end but none of them has allowed me to fix my problem so here goes I'm using OpenGL rendering to make an image tiling and caching library for use in a game project and I want to hijack the physics.. nice bounce behaviour might as well use it . So I have a UIScrollView which I'm using to get the rendering view for my textures but there's a problem moving around on the scroll view prevents the CADisplayLink..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud imageNamed is bad but equal numbers of people saying the performance is good especially when rendering UITableView s. See this SO question for example or this article on iPhoneDeveloperTips.com UIImage 's..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 the frame buffer than using glReadPixels I would need read only access to a small rectangular rendering area in the frame buffer to process the data further in CPU. Performance is important because I have.. within an OpenGL ES texture. You can take advantage of this to grab the pixels for an OpenGL ES rendering by using a framebuffer object FBO with an attached texture with that texture having been supplied from.. sourcePixelBufferAttributesDictionary Once I have that I configure the FBO that I'll be rendering my video frames to using the following code if GPUImageOpenGLESContext supportsFastTextureUpload CVReturn..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone sure we have our context if context free pixelData NSLog @ Context not created Draw the image to the bitmap context. The memory allocated for the context for rendering will then contain the raw image pixelData in the specified color space. CGRect rect 0 0 self.size.width self.size.height CGContextDrawImage context rect self.CGImage..
http://stackoverflow.com/questions/2711297/underline-text-in-uilabel How can I underline a text that could be multiple lines of string I find some people suggest UIWebView but it is obviously too heave a class for just text rendering. My thoughts was to figure out the start point and length of each string in each line. And draw a line under it accordingly. I meet problems at how to figure out..
Can I embed a custom font in an iPhone application? http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application I embed a custom font in an iPhone application I would like to have an app include a custom font for rendering text load it and then use it with standard UIKit elements like UILabel. Is this possible I found these links http discussions.apple.com thread.jspa messageID 8304744..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting headaches. Editing would work like in UITextView but require a whole new level of headache. Still private. CoreText Framework Since iOS 3.2 a very very good rendering engine. But that's it. Can directly layout and render NSAttributesString s. However there is no user interaction. No text selection no text input no spell checking.. s. However there is no user interaction. No text selection no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows interaction with the keyboard and to grab text input . Also..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints real time render of new zoom levels. CATiledLayer Method Theres a significant Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the.. are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer rendering kicks in once the scale is 1. iBooks takes.. I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer rendering kicks in once the scale is 1. iBooks takes a similar double take approach as if you scroll the pages you can see a lower res version of the page for just less than..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour OpenGL rendering breaks UIScrollView behaviour There are a few similar questions out there on SO links at end but none of them has allowed me to fix my problem so here goes I'm.. behaviour There are a few similar questions out there on SO links at end but none of them has allowed me to fix my problem so here goes I'm using OpenGL rendering to make an image tiling and caching library for use in a game project and I want to hijack the physics of the UIScrollView to allow the user to navigate around.. to allow the user to navigate around the images since it has nice bounce behaviour might as well use it . So I have a UIScrollView which I'm using to get the rendering view for my textures but there's a problem moving around on the scroll view prevents the CADisplayLink from firing until the user has finished scrolling which looks..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud the UIImage imageNamed FUD I see a lot of people saying imageNamed is bad but equal numbers of people saying the performance is good especially when rendering UITableView s. See this SO question for example or this article on iPhoneDeveloperTips.com UIImage 's imageNamed method used to leak so it was best avoided but..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 in iPhone OpenGL ES 2.0 Is there any faster way to access the frame buffer than using glReadPixels I would need read only access to a small rectangular rendering area in the frame buffer to process the data further in CPU. Performance is important because I have to perform this operation repeatedly. I have searched the web.. can be used in reverse to get quick access to the raw pixels within an OpenGL ES texture. You can take advantage of this to grab the pixels for an OpenGL ES rendering by using a framebuffer object FBO with an attached texture with that texture having been supplied from the texture cache. Once you render your scene into that FBO.. assetWriterVideoInput sourcePixelBufferAttributes sourcePixelBufferAttributesDictionary Once I have that I configure the FBO that I'll be rendering my video frames to using the following code if GPUImageOpenGLESContext supportsFastTextureUpload CVReturn err CVOpenGLESTextureCacheCreate kCFAllocatorDefault NULL..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone pixelData NSLog @ Context not created Draw the image to the bitmap context. The memory allocated for the context for rendering will then contain the raw image pixelData in the specified color space. CGRect rect 0 0 self.size.width self.size.height..
http://stackoverflow.com/questions/2711297/underline-text-in-uilabel be multiple lines of string I find some people suggest UIWebView but it is obviously too heave a class for just text rendering. My thoughts was to figure out the start point and length of each string in each line. And draw a line under it accordingly...
Can I embed a custom font in an iPhone application? http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application I embed a custom font in an iPhone application I would like to have an app include a custom font for rendering text load it and then use it with standard UIKit elements like UILabel. Is this possible I found these links http discussions.apple.com..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting UITextView but require a whole new level of headache. Still private. CoreText Framework Since iOS 3.2 a very very good rendering engine. But that's it. Can directly layout and render NSAttributesString s. However there is no user interaction. No text.. user interaction. No text selection no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows interaction with the..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints Method Theres a significant Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty.. monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer rendering.. a UIImage of a page in a separate thread issues here too and presenting it while the scale is x1. CATiledLayer rendering kicks in once the scale is 1. iBooks takes a similar double take approach as if you scroll the pages you can see a lower..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour OpenGL rendering breaks UIScrollView behaviour There are a few similar questions out there on SO links at end but none of them has allowed.. questions out there on SO links at end but none of them has allowed me to fix my problem so here goes I'm using OpenGL rendering to make an image tiling and caching library for use in a game project and I want to hijack the physics of the UIScrollView.. images since it has nice bounce behaviour might as well use it . So I have a UIScrollView which I'm using to get the rendering view for my textures but there's a problem moving around on the scroll view prevents the CADisplayLink from firing until..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud a lot of people saying imageNamed is bad but equal numbers of people saying the performance is good especially when rendering UITableView s. See this SO question for example or this article on iPhoneDeveloperTips.com UIImage 's imageNamed method..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 any faster way to access the frame buffer than using glReadPixels I would need read only access to a small rectangular rendering area in the frame buffer to process the data further in CPU. Performance is important because I have to perform this operation.. to the raw pixels within an OpenGL ES texture. You can take advantage of this to grab the pixels for an OpenGL ES rendering by using a framebuffer object FBO with an attached texture with that texture having been supplied from the texture cache... sourcePixelBufferAttributes sourcePixelBufferAttributesDictionary Once I have that I configure the FBO that I'll be rendering my video frames to using the following code if GPUImageOpenGLESContext supportsFastTextureUpload CVReturn err CVOpenGLESTextureCacheCreate..
How make a game loop on the iPhone without using NSTimer http://stackoverflow.com/questions/1351234/how-make-a-game-loop-on-the-iphone-without-using-nstimer loop. I use my own clock timer to keep track of the amount of time that has elapsed so that I can do this accurately. Rendering happens as fast as possible. I try to use some of the techniques as described in this article This is somewhat of an impulsive..
Applying brightness and contrast with OpenGL ES http://stackoverflow.com/questions/1506299/applying-brightness-and-contrast-with-opengl-es
Delayed UIImageView Rendering in UITableView http://stackoverflow.com/questions/1826913/delayed-uiimageview-rendering-in-uitableview UIImageView Rendering in UITableView Ok I've got a UITableView with custom UITableViewCell s that each contain a UIImageView whose images are..
UITableView Lazy Image Load, images appear after table STOPS scrolling http://stackoverflow.com/questions/1984866/uitableview-lazy-image-load-images-appear-after-table-stops-scrolling improve this question I just found my answer thanks to the 'Related' feature to the right.. Delayed UIImageView Rendering in UITableView You have to start NSUrlConnection in a different run loop so that you receive data while the table is scrolling...
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints GCD Blocks to prepare pages ahead of time. call CGContextSetInterpolationQuality ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations.. pages ahead of time. call CGContextSetInterpolationQuality ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is.. just show weird characters I guess it's an encoding issue but I'm not sure Credit BrainFeeder CALayer and Off Screen Rendering render the next page for fast smooth display Documentation Quartz PDFObjects Used for meta info annotations thumbs Abobe..
Rendering MKMapView to UIImage with real resolution http://stackoverflow.com/questions/4219496/rendering-mkmapview-to-uiimage-with-real-resolution MKMapView to UIImage with real resolution I am using this function for rendering MKMapView instance into image @implementation..
Rendering a CGPDFPage into a UIImage http://stackoverflow.com/questions/4639781/rendering-a-cgpdfpage-into-a-uiimage a CGPDFPage into a UIImage I'm trying to render a CGPDFPage selected from a CGPDFDocument into a UIImage to display on..
Rendering a UIWebView into an ImageContext http://stackoverflow.com/questions/469764/rendering-a-uiwebview-into-an-imagecontext a UIWebView into an ImageContext I am trying to capture the contents of a UIWebView including that which is not visible..
Rendering to non-power-of-two texture on iPhone http://stackoverflow.com/questions/4760174/rendering-to-non-power-of-two-texture-on-iphone to non power of two texture on iPhone Is it possible to render to texture with OpenGL ES 1.1 on the iPhone 2G and older..
What's the best approach to draw lines between views? http://stackoverflow.com/questions/5847876/whats-the-best-approach-to-draw-lines-between-views in performance between Core Graphics and Core Animation based rendering. 3rd Edit The results are quite impressive Rendering 30 draggable views each connected to each other resulting in 435 lines renders smoothly at 60Hz on an iPad 2 using Core..
How to implement water ripples? http://stackoverflow.com/questions/665076/how-to-implement-water-ripples
Rendering UIView with its children http://stackoverflow.com/questions/788662/rendering-uiview-with-its-children UIView with its children I have a UIView that has an image and some buttons as its subviews. I'd like to get a snapshot..
Iframe Content Not Rendering Under Scroll In iOs5 iPad/iPhone http://stackoverflow.com/questions/8912218/iframe-content-not-rendering-under-scroll-in-ios5-ipad-iphone Content Not Rendering Under Scroll In iOs5 iPad iPhone I'm developing iPad html5 webpage that needs to display pages from other origins different..
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