diff options
Diffstat (limited to 'Master/texmf-dist/asymptote/shaders/presum.glsl')
-rwxr-xr-x | Master/texmf-dist/asymptote/shaders/presum.glsl | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Master/texmf-dist/asymptote/shaders/presum.glsl b/Master/texmf-dist/asymptote/shaders/presum.glsl new file mode 100755 index 00000000000..5b0a8df89e0 --- /dev/null +++ b/Master/texmf-dist/asymptote/shaders/presum.glsl @@ -0,0 +1,37 @@ +layout(local_size_x=1) in; + +uniform uint elements; + +layout(binding=0, std430) buffer sumBuffer +{ + uint sum[]; +}; + +layout(binding=1, std430) buffer offsetBuffer +{ + uint offset[]; +}; + +void main(void) +{ + uint id=gl_GlobalInvocationID.x; + + uint m=elements/gl_NumWorkGroups.x; + uint r=elements-m*gl_NumWorkGroups.x; + uint row,stop; + if(id < r) { + row=m*id+id; + stop=row+m+1u; + } else { + row=m*id+r; + stop=row+m; + } + + uint Sum=offset[row]; + for(uint i=row+1u; i < stop; ++i) { + Sum += offset[i]; + offset[i]=Sum; + } + + sum[id+1u]=Sum; +} |