Databases
StackOverflow2013
Postsdbo
POShould I use Quartz or Open GL ES for my drawing app? Or both of them combined?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POShould I use Quartz or Open GL ES for my drawing app? Or both of them combined?
    primarykey
    data
    text
    <p>This is my first iPhone/iPad app :S</p> <p>It is a drawing app and I would like that user could save the current work and after that continue drawing on that same image (updating).</p> <p>I already did something based on <a href="http://www.codeproject.com/KB/iPhone/iOSGetStarted01.aspx" rel="nofollow">this</a> and <a href="http://www.ifans.com/forums/showthread.php?t=132024" rel="nofollow">this</a>. This uses Quartz. So I would have to save it to some format that can be read back into the memory and displayed on the screen for updating (user draws another line or erases some before).</p> <p>The images would be saved on server and I would like it to be in a format that in future Android devices also can read it (just read it, not update).</p> <p>Also, a lot of transformations is going to be on that images after they are finished drawing (scale, projection...). I found that Open GL ES is great for this transformations --> <a href="http://www.raywenderlich.com/3664/opengl-es-2-0-for-iphone-tutorial" rel="nofollow">Open GL ES</a></p> <p><strong>So the question is</strong>, </p> <p>should I use Quartz for drawing since it is simple and convert the image somehow to Open GL because Open GL is good for transformations? And in which format to save the drawing so it could be used latter for updating and that Android devices could also read it?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSTW
    1. USvale4674
    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. COWhile it is probably more difficult to do the drawing in OpenGL than Quartz, it is probably still easier than finding a way to convert to OpenGL(if it is even possible, I'm not sure either, but I doubt it). Not really sure about the other part.
      singulars
      1. POShould I use Quartz or Open GL ES for my drawing app? Or both of them combined?
      1. USturbo
    2. CO@turboSwag The only reason I am thinking about OpenGL is because of the transformations. And I think that it could be easier to save it in format for later Android usage.
      singulars
      1. POShould I use Quartz or Open GL ES for my drawing app? Or both of them combined?
      1. USvale4674
    3. COOpenGL is definitely more robust, but the only way you could really convert from quartz would be to store points and pass them asa vertices in OpenGL, at which point it would probably be easier to just use OpenGL in the first place. Really, it sounds like trying to use Quartz would add an unnecessary step.
      singulars
      1. POShould I use Quartz or Open GL ES for my drawing app? Or both of them combined?
      1. USturbo
 

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