opencl/opacity.cl

   1 __kernel void gegl_opacity_RaGaBaA_float (__global const float4     *in,
   2                                           __global const float      *aux,
   3                                           __global       float4     *out,
   4                                           float value)
   5 {
   6   int gid = get_global_id(0);
   7   float4 in_v  = in [gid];
   8   float  aux_v = (aux)? aux[gid] : 1.0f;
   9   float4 out_v;
  10   out_v = in_v * aux_v * value;
  11   out[gid]  =  out_v;
  12 }
  13 __kernel void gegl_opacity_RGBA_float (__global const float4     *in,
  14                                        __global const float      *aux,
  15                                        __global       float4     *out,
  16                                        float value)
  17 {
  18   int gid = get_global_id(0);
  19   float4 in_v  = in [gid];
  20   float  aux_v = (aux)? aux[gid] : 1.0f;
  21   float4 out_v = (float4)(in_v.x, in_v.y, in_v.z, in_v.w * aux_v * value);
  22   out[gid]  =  out_v;
  23 }
  24