Author Topic: CreateMaskFromColor (Read 3160 times)

kidchameleon · « **on:** December 12, 2011, 11:53:48 pm »

Hi All,

If I'm using an image I can use the CreateMaskFromColor function to remove pixels from the image. Is there any way I can do this with a render texture?

Thanks.

julen26 · « **Reply #1 on:** December 13, 2011, 12:19:10 am »

You could get the texture using GetTexture function and then get an Image using CopyToImage function of that texture. Finally, use CreateMaskFromColor function.

It may be a slow operation.

Cheers.

Laurent · « **Reply #2 on:** December 13, 2011, 07:54:50 am »

Can't you draw things directly with the right alpha, instead of creating it from a color after everythings drawn?

kidchameleon · « **Reply #3 on:** December 13, 2011, 09:07:04 pm »

@julen,

Thanks ill give that a shot now!

@laurent

Well I'm drawing a colorful background, than another completely black background over it, finally I want the shapes of my sprites to cut into the black background, leaving a nice view of the colorful background. Its kind of hard to describe what I'm doing, its like the "Crayon Scratch Art" that you would have done in school.

kidchameleon · « **Reply #4 on:** December 13, 2011, 09:49:58 pm »

Quote from: "julen26"

You could get the texture using GetTexture function and then get an Image using CopyToImage function of that texture. Finally, use CreateMaskFromColor function.

It may be a slow operation.

Cheers.

Ok so Ive done that, sucess!!!!!

Only problem is that my entire scene is fliped? Perhaps one of the methods fips an image / texture during conversion?

Anyway my game is looking great!

kidchameleon · « **Reply #5 on:** December 13, 2011, 10:05:56 pm »

Quote from: "kidchameleon"

Only problem is that my entire scene is fliped? Perhaps one of the methods fips an image / texture during conversion?

Anyway my game is looking great!

Problem solved guys, it would appear that when CopyToImage() is invoked, the image is vertically flipped. The solution I found is to to flip it vertically again after the copy. Now my scene looks perfect. I'm not sure what the performance hit is with all these image / texture copy's but so far the FPS is fine.

Thanks again for your help guys.

Laurent · « **Reply #6 on:** December 13, 2011, 10:43:29 pm »

Quote

it would appear that when CopyToImage() is invoked, the image is vertically flipped

Don't forget to call Display() on your render-texture.

kidchameleon · « **Reply #7 on:** December 13, 2011, 11:59:47 pm »

Quote from: "Laurent"

Quote
it would appear that when CopyToImage() is invoked, the image is vertically flipped

Don't forget to call Display() on your render-texture.

Yep, done that, that's a better way of doing it, cheers Laurent!