/**
* Copy ARGB pixels to a ByteBuffer without changing the ARGB byte order. If used to make a
* texture, the pixel format is GL12.GL_BGRA. With this format we can leave pixels in ARGB order
* (faster), but unfortunately I had problems building mipmaps in BGRA format
* (GLU.gluBuild2DMipmaps() did not recognize GL_UNSIGNED_INT_8_8_8_8 and
* GL_UNSIGNED_INT_8_8_8_8_REV types so screwed up the BGRA/ARGB byte order on Mac).
*
* @return ByteBuffer
*/
public static ByteBuffer convertImagePixelsARGB(
int[] jpixels, int imgw, int imgh, boolean flipVertically) {
// flip Y axis
if (flipVertically) {
jpixels = flipPixels(jpixels, imgw, imgh); // flip Y axis
}
// put int pixels into Byte Buffer
ByteBuffer bb = GLApp.allocBytes(jpixels.length * 4); // 4 bytes per pixel
bb.asIntBuffer().put(jpixels);
return bb;
}
