Example shaders

shaders/false-color/shader.json

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+{
+  "id": "false-color",
+  "name": "False Color",
+  "description": "Maps luminance ranges to exposure-assist colors for camera and shader debugging.",
+  "category": "Utility",
+  "entryPoint": "shadeVideo",
+  "parameters": [
+    {
+      "id": "blendAmount",
+      "label": "Blend",
+      "type": "float",
+      "default": 1.0,
+      "min": 0.0,
+      "max": 1.0,
+      "step": 0.01
+    },
+    {
+      "id": "showLuma",
+      "label": "Show Luma",
+      "type": "bool",
+      "default": false
+    },
+    {
+      "id": "lift",
+      "label": "Lift",
+      "type": "float",
+      "default": 0.0,
+      "min": -0.25,
+      "max": 0.25,
+      "step": 0.001
+    },
+    {
+      "id": "gain",
+      "label": "Gain",
+      "type": "float",
+      "default": 1.0,
+      "min": 0.25,
+      "max": 2.0,
+      "step": 0.01
+    }
+  ]
+}

shaders/false-color/shader.slang

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+float3 falseColorRamp(float luma)
+{
+	if (luma < 0.05)
+		return float3(0.0, 0.0, 0.0);
+	if (luma < 0.15)
+		return lerp(float3(0.04, 0.02, 0.24), float3(0.05, 0.18, 0.95), smoothstep(0.05, 0.15, luma));
+	if (luma < 0.35)
+		return lerp(float3(0.05, 0.18, 0.95), float3(0.0, 0.85, 1.0), smoothstep(0.15, 0.35, luma));
+	if (luma < 0.55)
+		return lerp(float3(0.0, 0.85, 1.0), float3(0.18, 0.95, 0.18), smoothstep(0.35, 0.55, luma));
+	if (luma < 0.75)
+		return lerp(float3(0.18, 0.95, 0.18), float3(1.0, 0.92, 0.08), smoothstep(0.55, 0.75, luma));
+	if (luma < 0.9)
+		return lerp(float3(1.0, 0.92, 0.08), float3(1.0, 0.35, 0.02), smoothstep(0.75, 0.9, luma));
+	return lerp(float3(1.0, 0.35, 0.02), float3(1.0, 0.0, 0.0), smoothstep(0.9, 1.0, luma));
+}
+
+float4 shadeVideo(ShaderContext context)
+{
+	float3 source = context.sourceColor.rgb;
+	float luma = saturate((dot(source, float3(0.2126, 0.7152, 0.0722)) + lift) * max(gain, 0.001));
+	float3 mapped = falseColorRamp(luma);
+	if (showLuma)
+		mapped = lerp(mapped, float3(luma, luma, luma), 0.45);
+	return float4(lerp(source, mapped, saturate(blendAmount)), context.sourceColor.a);
+}