libwebp 0.4.0 - 12/19/13: version 0.4.0 * improved gif2webp tool * numerous fixes, compression improvement and speed-up * dither option added to decoder (dwebp -dither 50 ...) * improved multi-threaded modes (-mt option) * improved filtering strength determination * New function: WebPMuxGetCanvasSize * BMP and TIFF format output added to 'dwebp' * Significant memory reduction for decoding lossy images with alpha. * Intertwined decoding of RGB and alpha for a shorter time-to-first-decoded-pixel. * WebPIterator has a new member 'has_alpha' denoting whether the frame contains transparency. * Container spec amended with new 'blending method' for animation.
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