init

gamedata/shaders/d3d11/dof.hlsli

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+#ifndef DOF_H_INCLUDED
+#define DOF_H_INCLUDED
+
+uniform float4 screen_res;
+
+#ifndef USE_DOF
+
+float3 dof(float2 center)
+{
+    float3 img = s_image.Sample(smp_rtlinear, center).xyz;
+    return img;
+}
+
+#else //	USE_DOF
+
+// x - near y - focus z - far w - sky distance
+float4 dof_params;
+float3 dof_kernel; // x,y - resolution pre-scaled z - just kernel size
+
+float DOFFactor(float depth)
+{
+    float dist_to_focus = depth - dof_params.y;
+    float blur_far = saturate(dist_to_focus * rcp(dof_params.z - dof_params.y));
+    float blur_near = saturate(dist_to_focus * rcp(dof_params.x - dof_params.y));
+    float blur = blur_near + blur_far;
+    blur *= blur;
+    return blur;
+}
+
+float sampleDepth(float2 center)
+{
+    float P = s_position.SampleLevel(smp_nofilter, center, 0).x;
+    return P > 0.9999f ? dof_params.w : (depth_unpack.x * rcp(P - depth_unpack.y));
+}
+
+#define MAXCOF 7.h
+#define EPSDEPTH 0.0001h
+
+float3 dof(float2 center)
+{
+    // Scale tap offsets based on render target size
+    float depth = sampleDepth(center);
+    float blur = DOFFactor(depth);
+    float2 scale = 0.5f * screen_res.zw * dof_kernel.z * blur;
+
+    // poisson
+    float2 o[12];
+    o[0] = float2(-0.326212f, -0.405810f) * scale;
+    o[1] = float2(-0.840144f, -0.073580f) * scale;
+    o[2] = float2(-0.695914f, 0.457137f) * scale;
+    o[3] = float2(-0.203345f, 0.620716f) * scale;
+    o[4] = float2(0.962340f, -0.194983f) * scale;
+    o[5] = float2(0.473434f, -0.480026f) * scale;
+    o[6] = float2(0.519456f, 0.767022f) * scale;
+    o[7] = float2(0.185461f, -0.893124f) * scale;
+    o[8] = float2(0.507431f, 0.064425f) * scale;
+    o[9] = float2(0.896420f, 0.412458f) * scale;
+    o[10] = float2(-0.321940f, -0.932615f) * scale;
+    o[11] = float2(-0.791559f, -0.597710f) * scale;
+
+    float3 sum = s_image.Sample(smp_nofilter, center).xyz;
+    float contrib = 1.h;
+
+    [unroll]
+    for (int i = 0; i < 12; i++)
+    {
+        float2 tap = center + o[i];
+        float3 tap_color = s_image.Sample(smp_nofilter, tap).xyz;
+        float tap_depth = sampleDepth(tap);
+        float tap_contrib = DOFFactor(tap_depth);
+        sum += tap_color * tap_contrib;
+        contrib += tap_contrib;
+    }
+
+    return float3(sum / contrib);
+}
+
+#endif //	USE_DOF
+#endif //	DOF_H_INCLUDED
+