51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
/*
|
|
* Copyright 2018 Attila Kocsis. All rights reserved.
|
|
* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
|
|
*/
|
|
|
|
#include "bgfx_compute.sh"
|
|
#include "uniforms.sh"
|
|
|
|
IMAGE2D_WO(s_target, r8, 0);
|
|
SAMPLER2DARRAY(s_finalSSAO, 1);
|
|
|
|
NUM_THREADS(8, 8, 1)
|
|
void main()
|
|
{
|
|
uvec2 dtID = uvec2(gl_GlobalInvocationID.xy);
|
|
|
|
uvec2 dim = imageSize(s_target).xy;
|
|
if (all(lessThan(dtID.xy, dim) ) )
|
|
{
|
|
uvec2 basePos = uvec2(dtID.xy) * 2;
|
|
|
|
vec2 baseUV = (vec2(basePos) + vec2( 0.5, 0.5 ) ) * u_halfViewportPixelSize;
|
|
vec2 gatherUV = (vec2(basePos) + vec2( 1.0, 1.0 ) ) * u_halfViewportPixelSize;
|
|
|
|
float avg = 0.0;
|
|
float minV = 1.0;
|
|
float maxV = 0.0;
|
|
UNROLL
|
|
for( int i = 0; i < 4; i++ )
|
|
{
|
|
vec4 vals = textureGather(s_finalSSAO, vec3( gatherUV, i ), 0);
|
|
|
|
// apply the same modifications that would have been applied in the main shader
|
|
vals = u_effectShadowStrength * vals;
|
|
|
|
vals = 1-vals;
|
|
|
|
vals = pow( saturate( vals ), u_effectShadowPow.xxxx );
|
|
|
|
avg += dot( vec4( vals.x, vals.y, vals.z, vals.w ), vec4( 1.0 / 16.0, 1.0 / 16.0, 1.0 / 16.0, 1.0 / 16.0 ) );
|
|
|
|
maxV = max( maxV, max( max( vals.x, vals.y ), max( vals.z, vals.w ) ) );
|
|
minV = min( minV, min( min( vals.x, vals.y ), min( vals.z, vals.w ) ) );
|
|
}
|
|
|
|
float minMaxDiff = maxV - minV;
|
|
|
|
imageStore(s_target, ivec2(dtID.xy), pow( saturate( minMaxDiff * 2.0 ), 0.8 ).xxxx);
|
|
}
|
|
}
|