SPSprite or SPImage to UIImage?

wurmboy

I'm generating a series of SHCircle's which I want to use as a bitmap mask using this method:

+(SPTexture *)maskedTextureWithSource:(UIImage *)sourceImg andMask:(UIImage *)maskImg
{
    CGImageRef maskRef = maskImg.CGImage;

    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);

    CGImageRef masked = CGImageCreateWithMask([sourceImg CGImage], mask);
    UIImage *maskedImg = [UIImage imageWithCGImage:masked];

    return [[SPTexture alloc] initWithContentsOfImage:maskedImg];
}

Found at: http://forum.sparrow-framework.org/topic/bitmap-masking

Is there an easy way for me to turn my SHCircles, or the sprite that contains them into a UIImage?

Daniel

Actually, the drawing methods of Core Graphics should be able to draw circles as well! Use those instead of SHCircle.

wurmboy

Awesome, thanks!

chdrvn

I would also like to know an easy way to make a UIImage from a SPSprite/SPImage to use with UIImageWriteToSavedPhotosAlbum().

Ive seen it mentioned here that its possible but I cant seem to get it to work.

xidadesign

Yeah I would like to know how that works too!

Shilo

I updated my image-creating extension for Sparrow 2.X.

http://wiki.sparrow-framework.org/users/shilo/extensions/spdisplayobject_image2

Sample usage:

SPImage *spImage = [SPImage imageWithContentsOfFile:@"image.png"];
UIImage *uiImage = spImage.UIImage;

I haven't had time to fully test this extension since Sparrow 1.X, so I imagine there is a couple bugs, such as image dimensions being incorrect. Anyone willing to make the necessary fixes on this extension, will be much appreciated.

xidadesign

I tried the following with your extension, but the result was only a black view.

//first load the normal sparrow image, this displays the image just fine
_image = [SPImage imageWithTexture:_texture];
[self.view addChild:_image];

//now convert it to a uiimageview
UIImageView *cUIImage = [[UIImageView alloc] initWithImage:_image.UIImage];

//after this line I only see black (the image was a fullscreen image)
[Sparrow.currentController.view addSubview:cUIImage];

I also tried adding a UIImage the regular way to Sparrow.currentController.view, which worked.

Edit:
It seems to be a problem with "SPImage imageWithTexture" if I use "SPImage imageWithContentsOfFile" it works.

Daniel

Wow, thanks a lot for the update, Shilo! 🙂

chdrvn

Thanks for the help guys. Finally updated my sparrow to the latest version but I get a EXC_BAD_ACCESS for some reason when I try this.

Seems to not like the [SPRenderSupport clearWithColor:backgroundColor alpha:1.0f];

SPRenderTexture *renderTexture = [[SPRenderTexture alloc] initWithWidth:320 height:400];
    for (int i=0; i<10; ++i)
    {
        [renderTexture drawObject:self];
    }

    SPImage *renderImage = [SPImage imageWithTexture:renderTexture];
    UIImageView *cUIImage = [[UIImageView alloc] initWithImage:renderImage.UIImage];

Shilo

Sorry to hear that, I won't have time to check it out anytime soon. Best of luck!

Alternatively, you can give these solutions a try (which my extension is based off of):
http://forum.sparrow-framework.org/topic/spdisplayobjectscreenshot