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javalibgdxtexturespixmap

How to rotate a pixmap by 90º to draw to a texture in libgdx?

I need to rotate a Pixmap by 90 degrees. I have seen an answer that achieves a flipped Pixmap. I need to rotate images that are in portrait orientation to landscape already on the Pixmap-level to later create textures out of them.

Solution

  • similar to the flip pixmap method I achieved a 90º rotated Pixmap like this:

    private Pixmap rotatePixmap (Pixmap srcPix){
    final int width = srcPix.getWidth();
    final int height = srcPix.getHeight();
    Pixmap rotatedPix = new Pixmap(height, width, srcPix.getFormat());

    for (int x = 0; x < height; x++) {
        for (int y = 0; y < width; y++) {
            rotatedPix.drawPixel(x, y, srcPix.getPixel(y, x));
        }
    }

    srcPix.dispose();
    return rotatedPix;
}

    Note that also width & height get swapped after the 90º rotation