1 files changed, 124 insertions, 0 deletions
diff --git a/servers/rendering/renderer_rd/shaders/ssil_blur.glsl b/servers/rendering/renderer_rd/shaders/ssil_blur.glsl
new file mode 100644
index 0000000000..11861e261f
--- /dev/null
+++ b/servers/rendering/renderer_rd/shaders/ssil_blur.glsl
@@ -0,0 +1,124 @@
+#[compute]
+
+#version 450
+
+#VERSION_DEFINES
+
+layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
+
+layout(set = 0, binding = 0) uniform sampler2D source_ssil;
+
+layout(rgba16, set = 1, binding = 0) uniform restrict writeonly image2D dest_image;
+
+layout(r8, set = 2, binding = 0) uniform restrict readonly image2D source_edges;
+
+layout(push_constant, binding = 1, std430) uniform Params {
+	float edge_sharpness;
+	float pad;
+	vec2 half_screen_pixel_size;
+}
+params;
+
+vec4 unpack_edges(float p_packed_val) {
+	uint packed_val = uint(p_packed_val * 255.5);
+	vec4 edgesLRTB;
+	edgesLRTB.x = float((packed_val >> 6) & 0x03) / 3.0;
+	edgesLRTB.y = float((packed_val >> 4) & 0x03) / 3.0;
+	edgesLRTB.z = float((packed_val >> 2) & 0x03) / 3.0;
+	edgesLRTB.w = float((packed_val >> 0) & 0x03) / 3.0;
+
+	return clamp(edgesLRTB + params.edge_sharpness, 0.0, 1.0);
+}
+
+void add_sample(vec4 p_ssil_value, float p_edge_value, inout vec4 r_sum, inout float r_sum_weight) {
+	float weight = p_edge_value;
+
+	r_sum += (weight * p_ssil_value);
+	r_sum_weight += weight;
+}
+
+#ifdef MODE_WIDE
+vec4 sample_blurred_wide(ivec2 p_pos, vec2 p_coord) {
+	vec4 ssil_value = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, 0));
+	vec4 ssil_valueL = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(-2, 0));
+	vec4 ssil_valueT = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, -2));
+	vec4 ssil_valueR = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(2, 0));
+	vec4 ssil_valueB = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, 2));
+
+	vec4 edgesLRTB = unpack_edges(imageLoad(source_edges, p_pos).r);
+	edgesLRTB.x *= unpack_edges(imageLoad(source_edges, p_pos + ivec2(-2, 0)).r).y;
+	edgesLRTB.z *= unpack_edges(imageLoad(source_edges, p_pos + ivec2(0, -2)).r).w;
+	edgesLRTB.y *= unpack_edges(imageLoad(source_edges, p_pos + ivec2(2, 0)).r).x;
+	edgesLRTB.w *= unpack_edges(imageLoad(source_edges, p_pos + ivec2(0, 2)).r).z;
+
+	float sum_weight = 0.8;
+	vec4 sum = ssil_value * sum_weight;
+
+	add_sample(ssil_valueL, edgesLRTB.x, sum, sum_weight);
+	add_sample(ssil_valueR, edgesLRTB.y, sum, sum_weight);
+	add_sample(ssil_valueT, edgesLRTB.z, sum, sum_weight);
+	add_sample(ssil_valueB, edgesLRTB.w, sum, sum_weight);
+
+	vec4 ssil_avg = sum / sum_weight;
+
+	ssil_value = ssil_avg;
+
+	return ssil_value;
+}
+#endif
+
+#ifdef MODE_SMART
+vec4 sample_blurred(ivec2 p_pos, vec2 p_coord) {
+	vec4 vC = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, 0));
+	vec4 vL = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(-1, 0));
+	vec4 vT = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, -1));
+	vec4 vR = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(1, 0));
+	vec4 vB = textureLodOffset(source_ssil, vec2(p_coord), 0.0, ivec2(0, 1));
+
+	float packed_edges = imageLoad(source_edges, p_pos).r;
+	vec4 edgesLRTB = unpack_edges(packed_edges);
+
+	float sum_weight = 0.5;
+	vec4 sum = vC * sum_weight;
+
+	add_sample(vL, edgesLRTB.x, sum, sum_weight);
+	add_sample(vR, edgesLRTB.y, sum, sum_weight);
+	add_sample(vT, edgesLRTB.z, sum, sum_weight);
+	add_sample(vB, edgesLRTB.w, sum, sum_weight);
+
+	vec4 ssil_avg = sum / sum_weight;
+
+	vec4 ssil_value = ssil_avg;
+
+	return ssil_value;
+}
+#endif
+
+void main() {
+	// Pixel being shaded
+	ivec2 ssC = ivec2(gl_GlobalInvocationID.xy);
+
+#ifdef MODE_NON_SMART
+
+	vec2 half_pixel = params.half_screen_pixel_size * 0.5;
+
+	vec2 uv = (vec2(gl_GlobalInvocationID.xy) + vec2(0.5, 0.5)) * params.half_screen_pixel_size;
+
+	vec4 centre = textureLod(source_ssil, uv, 0.0);
+
+	vec4 value = textureLod(source_ssil, vec2(uv + vec2(-half_pixel.x * 3, -half_pixel.y)), 0.0) * 0.2;
+	value += textureLod(source_ssil, vec2(uv + vec2(+half_pixel.x, -half_pixel.y * 3)), 0.0) * 0.2;
+	value += textureLod(source_ssil, vec2(uv + vec2(-half_pixel.x, +half_pixel.y * 3)), 0.0) * 0.2;
+	value += textureLod(source_ssil, vec2(uv + vec2(+half_pixel.x * 3, +half_pixel.y)), 0.0) * 0.2;
+
+	vec4 sampled = value + centre * 0.2;
+
+#else
+#ifdef MODE_SMART
+	vec4 sampled = sample_blurred(ssC, (vec2(gl_GlobalInvocationID.xy) + vec2(0.5, 0.5)) * params.half_screen_pixel_size);
+#else // MODE_WIDE
+	vec4 sampled = sample_blurred_wide(ssC, (vec2(gl_GlobalInvocationID.xy) + vec2(0.5, 0.5)) * params.half_screen_pixel_size);
+#endif
+#endif // MODE_NON_SMART
+	imageStore(dest_image, ssC, sampled);
+}