How to map TextureRegion into Pixmap correctly?

Question

I am trying to make my texture region into a pixmap but by following the prepared method it is copying the whole atlas into the pixmap , so I am suggested to loop each pixel and map it into another pixmap manually

    Pixmap emptyPixmap = new Pixmap(trLine.getRegionWidth(), trLine.getRegionHeight(), Pixmap.Format.RGBA8888);

    Texture texture = trLine.getTexture();
    texture.getTextureData().prepare();
    Pixmap pixmap = texture.getTextureData().consumePixmap();

    for (int x = 0; x < trLine.getRegionWidth(); x++) {
        for (int y = 0; y < trLine.getRegionHeight(); y++) {
            int colorInt = pixmap.getPixel(trLine.getRegionX() + x, trLine.getRegionY() + y);
            emptyPixmap.drawPixel( trLine.getRegionX() + x , trLine.getRegionY() + y , colorInt );
        }
    }

    trBlendedLine=new Texture(emptyPixmap);

But the texture generated is drawing nothing , which means the getPixel is not getting the correct pixel. Please advice.

the method trLine.getTexture() gets the whole texture for the texture region. if you just want the specific region use trLine — dfour, Oct 25 '17 at 12:21
Did you try this solution: https://stackoverflow.com/questions/29451787/libgdx-textureregion-to-pixmap — MilanG, Oct 25 '17 at 13:39
@MilanG Yes , I am trying this solution , but couldn't get it to work with textureRegion — Leon Armstrong, Oct 25 '17 at 15:43
@dfour thanks for the info , but I need to consumePixmap() method to map the textureregion into pixmap — Leon Armstrong, Oct 25 '17 at 15:44

score 1 · Accepted Answer · answered Oct 26 '17 at 13:57

1

You are drawing your pixel outside of the pixmap by using the trLine.getRegionX() + x and trLine.getRegionY() + y . What you should have instead is:

for (int x = 0; x < trLine.getRegionWidth(); x++) {
    for (int y = 0; y < trLine.getRegionHeight(); y++) {
        int colorInt = pixmap.getPixel(trLine.getRegionX() + x, trLine.getRegionY() + y);
        emptyPixmap.drawPixel(x , y , colorInt );
    }
}

answered Oct 26 '17 at 13:57

dfour

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thats the obvious bug in my code , btw , I realise pixmap is very costly to achieve what I want , like erasing a polygon shape out of a texture – Leon Armstrong Oct 26 '17 at 14:21

How to map TextureRegion into Pixmap correctly?

1 Answers1