1 files changed, 110 insertions, 0 deletions
diff --git a/servers/rendering/renderer_rd/shaders/resolve.glsl b/servers/rendering/renderer_rd/shaders/resolve.glsl
new file mode 100644
index 0000000000..9429a66dc9
--- /dev/null
+++ b/servers/rendering/renderer_rd/shaders/resolve.glsl
@@ -0,0 +1,110 @@
+#[compute]
+
+#version 450
+
+VERSION_DEFINES
+
+layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
+
+#ifdef MODE_RESOLVE_GI
+layout(set = 0, binding = 0) uniform sampler2DMS source_depth;
+layout(set = 0, binding = 1) uniform sampler2DMS source_normal_roughness;
+
+layout(r32f, set = 1, binding = 0) uniform restrict writeonly image2D dest_depth;
+layout(rgba8, set = 1, binding = 1) uniform restrict writeonly image2D dest_normal_roughness;
+
+#ifdef GIPROBE_RESOLVE
+layout(set = 2, binding = 0) uniform usampler2DMS source_giprobe;
+layout(rg8ui, set = 3, binding = 0) uniform restrict writeonly uimage2D dest_giprobe;
+#endif
+
+#endif
+
+layout(push_constant, binding = 16, std430) uniform Params {
+	ivec2 screen_size;
+	int sample_count;
+	uint pad;
+}
+params;
+
+void main() {
+	// Pixel being shaded
+	ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
+	if (any(greaterThanEqual(pos, params.screen_size))) { //too large, do nothing
+		return;
+	}
+
+#ifdef MODE_RESOLVE_GI
+
+	float best_depth = 1e20;
+	vec4 best_normal_roughness = vec4(0.0);
+#ifdef GIPROBE_RESOLVE
+	uvec2 best_giprobe;
+#endif
+
+#if 0
+
+	for(int i=0;i<params.sample_count;i++) {
+		float depth = texelFetch(source_depth,pos,i).r;
+		if (depth < best_depth) { //use the depth closest to camera
+			best_depth = depth;
+			best_normal_roughness = texelFetch(source_normal_roughness,pos,i);
+
+#ifdef GIPROBE_RESOLVE
+			best_giprobe = texelFetch(source_giprobe,pos,i).rg;
+#endif
+		}
+	}
+
+#else
+
+	float depths[16];
+	int depth_indices[16];
+	int depth_amount[16];
+	int depth_count = 0;
+
+	for (int i = 0; i < params.sample_count; i++) {
+		float depth = texelFetch(source_depth, pos, i).r;
+		int depth_index = -1;
+		for (int j = 0; j < depth_count; j++) {
+			if (abs(depths[j] - depth) < 0.000001) {
+				depth_index = j;
+				break;
+			}
+		}
+
+		if (depth_index == -1) {
+			depths[depth_count] = depth;
+			depth_indices[depth_count] = i;
+			depth_amount[depth_count] = 1;
+			depth_count += 1;
+		} else {
+			depth_amount[depth_index] += 1;
+		}
+	}
+
+	int depth_least = 0xFFFF;
+	int best_index = 0;
+	for (int j = 0; j < depth_count; j++) {
+		if (depth_amount[j] < depth_least) {
+			best_index = depth_indices[j];
+			depth_least = depth_amount[j];
+		}
+	}
+
+	best_depth = texelFetch(source_depth, pos, best_index).r;
+	best_normal_roughness = texelFetch(source_normal_roughness, pos, best_index);
+#ifdef GIPROBE_RESOLVE
+	best_giprobe = texelFetch(source_giprobe, pos, best_index).rg;
+#endif
+
+#endif
+
+	imageStore(dest_depth, pos, vec4(best_depth));
+	imageStore(dest_normal_roughness, pos, vec4(best_normal_roughness));
+#ifdef GIPROBE_RESOLVE
+	imageStore(dest_giprobe, pos, uvec4(best_giprobe, 0, 0));
+#endif
+
+#endif
+}