summaryrefslogtreecommitdiff
path: root/graphics/asymptote/base/shaders/sum3.glsl
blob: 8e6e94bf4503aa56ac20d6faa0415b897a47342e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
layout(local_size_x=LOCAL_SIZE_X) in;

uniform uint offset2;
uniform uint final;

layout(binding=2, std430) buffer localSumBuffer
{
  uint localSum[];
};

layout(binding=3, std430) buffer globalSumBuffer
{
  uint globalSum[];
};

layout(binding=7, std430) buffer opaqueDepthBuffer
{
  uint maxSize;
  float opaqueDepth[];
};

void main(void)
{
  uint id=gl_GlobalInvocationID.x;
  uint row=offset2+LOCAL_SIZE_X*id;
  uint stop=row+LOCAL_SIZE_X;

  uint Sum=localSum[row];
  for(uint i=row+1u; i < stop; ++i)
    localSum[i]=Sum += localSum[i];

  uint id1=id+1u;
  if(id1 < gl_WorkGroupSize.x*gl_NumWorkGroups.x)
    globalSum[id1]=Sum;
  else {
    globalSum[0]=maxSize;
    globalSum[id1]=Sum+localSum[offset2-1u]+localSum[final];
  }
}