opencl/svg-src-over.cl

   1 __kernel void svg_src_over (__global const float4 *in,
   2                             __global const float4 *aux,
   3                             __global       float4 *out)
   4 {
   5   int gid = get_global_id(0);
   6   float4 in_v  = in [gid];
   7   float4 aux_v = aux[gid];
   8   float4 out_v;
   9   out_v.xyz = aux_v.xyz + in_v.xyz * (1.0f - aux_v.w);
  10   out_v.w   = aux_v.w + in_v.w - aux_v.w * in_v.w;
  11   out[gid]  = out_v;
  12 }