tk2dsprite to texture2D/byte[]

[aCallum]

Hey guys, I'm wondering if it's possible to extract the data of a tk2dsprite into a texture2D or byte[] object?

I'm wanting to send the image data over the internet. For example, we have an atlas texture containing medals (gold/silver/bronze) that are diplayed in game, when you complete a mission you can share your success via Facebook; including the medal image.

I know I can get the material and then the texture, but how can I get the texture data only for the current tk2dsprite area of that texture?

Cheers!

[unikronsoftware]

You'd have to derive it out from
sprite.CurrentSprite.uvs
But be aware, most textures aren't set up to be readable.

It might be easier and more efficient to render a sprite into a rendertarget, and then capture the contents of the render target instead.

[aCallum]

Interesting, can you explain to me which elements of the UVs Vector2[] object equal what?

How I can calculate the width/height and x/y pixel units? I'd imagine something like (TextureWidth / 100.0f) * UVs.x ?

[aCallum]

Well, a couple of hours and I have a solution that works for my needs. The only problem is it will not handle sprites that have been rotated on the atlas because I get the UV's explicitly.

Code: [Select]

public static Texture2D SpriteToTexture(tk2dSprite sourceSprite) {

        Texture2D sourceTexture = (Texture2D)sourceSprite.GetCurrentSpriteDef().material.mainTexture;

        Vector2[] UVs = sourceSprite.GetCurrentSpriteDef().uvs;

        // Get the raw uv-pixel co-ordinates of the image.
        float fX = (sourceTexture.width) * UVs[0].x;
        float fY = (sourceTexture.height) * UVs[2].y;
        float fX2 = (sourceTexture.width) * UVs[1].x;;
        float fY2 = (sourceTexture.height) * UVs[0].y;

        // Calculate the width and height of the sprite.
        float fWidth = fX2 - fX;
        float fHeight = -(fY2 - fY);

        // Round the values to pixel units.
        int x = Mathf.RoundToInt(fX);
        int y = Mathf.RoundToInt(fY - fHeight);
        int width = Mathf.RoundToInt(fWidth);
        int height = Mathf.RoundToInt(fHeight);

        // Get the pixels contained within the pixel units of the atlas.
        Color[] pixelRect = sourceTexture.GetPixels(x, y, width, height);

        // Generate a new texture and populate it with the pixel data.
        Texture2D newTexture = new Texture2D(width, height);
        newTexture.SetPixels(pixelRect);
        newTexture.Apply();

        return newTexture;
    }
I'll leave this here for anyone else that may be interested.

[unikronsoftware]

Thanks for sharing