diff options
| author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-26 17:42:24 +0000 |
|---|---|---|
| committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-26 17:42:24 +0000 |
| commit | 8755d76ce2d1deeb73dc8f47c1e44e40c0c54407 (patch) | |
| tree | 32fdf2e9897356faed7eb70c2eb0e397a3703d49 /libmpcodecs | |
| parent | a7e9bac13210834abd95380e89b5c3dae2336c52 (diff) | |
| download | mpv-8755d76ce2d1deeb73dc8f47c1e44e40c0c54407.tar.bz2 mpv-8755d76ce2d1deeb73dc8f47c1e44e40c0c54407.tar.xz | |
This is a simple patch to change the alpha blending code in bmovl to use
integers instead of floating point. It speeds it up by about 400%
meaning that it's now possible to apply alpha blending to a whole
1024x768 image on my 1266MHz PIII.
Jonas Jensen <jbj@knef.dk>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9111 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs')
| -rw-r--r-- | libmpcodecs/vf_bmovl.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/libmpcodecs/vf_bmovl.c b/libmpcodecs/vf_bmovl.c index 336f3de294..5d3a93e177 100644 --- a/libmpcodecs/vf_bmovl.c +++ b/libmpcodecs/vf_bmovl.c @@ -395,11 +395,20 @@ put_image(struct vf_instance_s* vf, mp_image_t* mpi){ dmpi->planes[2][pos] = vf->priv->bitmap.v[pos]; } } else { // Alphablended pixel - dmpi->planes[0][pos] = (dmpi->planes[0][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.y[pos]*(alpha/255.0)); + dmpi->planes[0][pos] = + ((255 - alpha) * (int)dmpi->planes[0][pos] + + alpha * (int)vf->priv->bitmap.y[pos]) >> 8; + if ((ypos%2) && (xpos%2)) { pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2); - dmpi->planes[1][pos] = (dmpi->planes[1][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.u[pos]*(alpha/255.0)); - dmpi->planes[2][pos] = (dmpi->planes[2][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.v[pos]*(alpha/255.0)); + + dmpi->planes[1][pos] = + ((255 - alpha) * (int)dmpi->planes[1][pos] + + alpha * (int)vf->priv->bitmap.u[pos]) >> 8; + + dmpi->planes[2][pos] = + ((255 - alpha) * (int)dmpi->planes[2][pos] + + alpha * (int)vf->priv->bitmap.v[pos]) >> 8; } } } // for xpos |