CCSprite added to CCLayer appears faint/transparent on device

cocos2d for iPhone » Programming » cocos2d support (graphics engine)

CCSprite added to CCLayer appears faint/transparent on device

(3 posts) (2 voices)

Started 1 year ago by JavaJoe
Latest reply from JavaJoe

Tags:

JavaJoe
Member
I am adding a CCSprite from a jpg to the HelloWorldScene (from the Cocos2D/Box2D xcode template), but the image appears very faint as if it is mostly transparent (about 20% opaque), on an iPhone device. This image shows up correctly in the simulator.

Here's how I am adding the sprite:
```
CGImageRef img =
	[[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"mygraphic" ofType:@"jpg"]] CGImage];

	CCSprite *sprite = [CCSprite spriteWithCGImage:img key:@"img1"];

	[self addChild:sprite];
```
I am using 0.99.5-beta 3 - is this a known issue or is there something I am missing?

Thanks in advance for any help or insights that can be provided.
Posted 1 year ago #

abitofcode
Moderator

Typically you would create a Sprite with one of the helper methods which eventually calls down to;

-(id) initWithFile:(NSString*)filename
{
	NSAssert(filename!=nil, @"Invalid filename for sprite");

	CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addImage: filename];
	if( texture ) {
		CGRect rect = CGRectZero;
		rect.size = texture.contentSize;
		return [self initWithTexture:texture rect:rect];
	}

	[self release];
	return nil;
}

Somewhere along the way the texture is added to the texture cache and the following is called

// Issue #886: TEMPORARY FIX FOR TRANSPARENT JPEGS IN IOS4
		else if ( ( [[CCConfiguration sharedConfiguration] OSVersion] >= kCCiOSVersion_4_0) &&
				  ( [lowerCase hasSuffix:@".jpg"] || [lowerCase hasSuffix:@".jpeg"] )
				 ) {
			// convert jpg to png before loading the texture
			UIImage *jpg = [[UIImage alloc] initWithContentsOfFile:fullpath];
			UIImage *png = [[UIImage alloc] initWithData:UIImagePNGRepresentation(jpg)];
			tex = [ [CCTexture2D alloc] initWithImage: png ];
			[png release];
			[jpg release];

So the jpeg is converted to png format which will probably fix the issue you are having. I'd avoid jpeg's if possible and use either png's or PVR (where appropriate).

Posted 1 year ago #

JavaJoe
Member

Thanks for the reply. I switched to a png of the image and all is good! I usually use png's, but was just trying a "quick" test and had a jpeg of a graphic I wanted to use...the test wasn't so quick ;)

Thanks for your help!

Posted 1 year ago #

RSS feed for this topic

Reply

You must log in to post.