Databases
StackOverflow2013
Postsdbo
PODrawing using renderInContext in a way that is analagous to UIView rendering
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PODrawing using renderInContext in a way that is analagous to UIView rendering
    primarykey
    data
    text
    <p>I have some UIViews that have different centers and transforms applied to them. I want to reconstruct these views on to a bitmap context. (Basically I want to take what the user has created on screen and render it on to a movie file)</p> <p>I am able to get the view rendered in the context to look <em>almost</em> correct however there seems to be an offset. I am thinking the problem is that the UIImageView's .center property is not reflected in the transforms that I am doing. However I am unsure how to do it. Note that the UIViews are originally positioned/transformed relative to a 1024x768 ipad screen where as the video buffer is 352 x 288 pixels</p> <p>If I just add a CGContextTranslateCTM(newContext,img.center.x,img.center.y) then everything looks completely off. Any ideas how to properly transform the view to the correct center?</p> <pre><code>CGContextRef newContext = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); CGContextRotateCTM(newContext, M_PI_2); CGContextScaleCTM(newContext, 1, -1); for(int i=0; i&lt;[self.renderObjects count]; i++){ UIImageView * img = [self.renderObjects objectAtIndex:i]; [img setNeedsDisplay]; [img setBackgroundColor:[UIColor colorWithRed:1 green:1 blue:1 alpha:0.2]]; CGContextSaveGState(newContext); CGContextScaleCTM(newContext, 0.375, 0.34); CGContextConcatCTM(newContext, img.transform); [img.layer renderInContext:newContext]; CGContextRestoreGState(newContext); } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser491880
    1. USuser491880
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload