Questions tagged [cgbitmapcontext]
35 questions
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Determine if a CGContextRef points to a CGBitmapContext
I was wondering how to ask an "isKindOfClass" to a CGContextRef in order to determine if it's a standard CGContext or a CGBitmapContext.
I can't find a way to determine it :/
Thanks in advance
user1593622
- 3
- 1
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Render nsimage offscreen and set pointer for decklink videoframe
I'm developing on osx.
I'm trying to set a pointer to pixel data rendered offscreen from an nsimage object.
This is my code:
- (id)initWithFrame:(NSImage*)image
{
if (self = [super init])
{
// set size
NSRect rect = NSMakeRect(0, 0, [image…
Thomas
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1 answer
Drawing frames from a movie into a CGBitmapContext
I have an app that needs to render frames from a video/movie into a CGBitmapContext with an arbitrary CGAffineTransform. I'd like it to have a decent frame rate, like 20fps at least.
I've tried using AVURLAsset and [AVAssetImageGenerator…
Christopher Schardt
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- 13
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1 answer
CGBitmapContext in MonoTouch throws invalid handle exception
I'm new to MonoTouch and I've recently been converting code from standard C# to MonoTouch compliant code so it can be used within an iPhone application. I've managed to convert the code, however I've run into a problem with this method which I use…
Jack Nutkins
- 1,555
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- 71
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1 answer
Options to CGBitmapContext for Drawining
Is there an option to the CGBitmapContext or Quartz 2D?
I want to use it for drawing on an UIImage in monotouch.
thanks Alex.
Alex
- 459
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