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/**
* Gather pass: Convolve foreground and background parts in separate passes.
*
* Using the min&max CoC tile buffer, we select the best appropriate method to blur the scene
*color. A fast gather path is taken if there is not many CoC variation inside the tile.
*
* We sample using an octaweb sampling pattern. We randomize the kernel center and each ring
* rotation to ensure maximum coverage.
*
* Outputs:
* - Color * Weight, Weight, Occlusion 'CoC' Depth (mean and variance)
**/
#pragma BLENDER_REQUIRE(eevee_depth_of_field_accumulator_lib.glsl)
void main()
{
ivec2 tile_co = ivec2(gl_GlobalInvocationID.xy / DOF_TILES_SIZE);
CocTile coc_tile = dof_coc_tile_load(in_tiles_fg_img, in_tiles_bg_img, tile_co);
CocTilePrediction prediction = dof_coc_tile_prediction_get(coc_tile);
float base_radius, min_radius, min_intersectable_radius;
bool can_early_out;
if (is_foreground) {
base_radius = -coc_tile.fg_min_coc;
min_radius = -coc_tile.fg_max_coc;
min_intersectable_radius = -coc_tile.fg_max_intersectable_coc;
can_early_out = !prediction.do_foreground;
}
else {
base_radius = coc_tile.bg_max_coc;
min_radius = coc_tile.bg_min_coc;
min_intersectable_radius = coc_tile.bg_min_intersectable_coc;
can_early_out = !prediction.do_background;
}
bool do_fast_gather = dof_do_fast_gather(base_radius, min_radius, is_foreground);
/* Gather at half resolution. Divide CoC by 2. */
base_radius *= 0.5;
min_intersectable_radius *= 0.5;
bool do_density_change = dof_do_density_change(base_radius, min_intersectable_radius);
vec4 out_color;
float out_weight;
vec2 out_occlusion;
if (can_early_out) {
out_color = vec4(0.0);
out_weight = 0.0;
out_occlusion = vec2(0.0, 0.0);
}
else if (do_fast_gather) {
dof_gather_accumulator(color_tx,
color_bilinear_tx,
coc_tx,
bokeh_lut_tx,
base_radius,
min_intersectable_radius,
true,
false,
out_color,
out_weight,
out_occlusion);
}
else if (do_density_change) {
dof_gather_accumulator(color_tx,
color_bilinear_tx,
coc_tx,
bokeh_lut_tx,
base_radius,
min_intersectable_radius,
false,
true,
out_color,
out_weight,
out_occlusion);
}
else {
dof_gather_accumulator(color_tx,
color_bilinear_tx,
coc_tx,
bokeh_lut_tx,
base_radius,
min_intersectable_radius,
false,
false,
out_color,
out_weight,
out_occlusion);
}
ivec2 out_texel = ivec2(gl_GlobalInvocationID.xy);
imageStore(out_color_img, out_texel, out_color);
imageStore(out_weight_img, out_texel, vec4(out_weight));
imageStore(out_occlusion_img, out_texel, out_occlusion.xyxy);
}
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