osc multi arguments

shaders/composition-guides/shader.slang

@@ -0,0 +1,48 @@
+float lineMask(float coordinate, float target, float pixelThickness, float resolution)
+{
+	float halfWidth = max(pixelThickness, 0.5) * 0.5 / max(resolution, 1.0);
+	float distanceToLine = abs(coordinate - target);
+	float feather = halfWidth * 0.85 + (1.0 / max(resolution, 1.0));
+	return 1.0 - smoothstep(halfWidth, feather, distanceToLine);
+}
+
+float thirdsMask(float2 uv, float2 resolution)
+{
+	float thickness = max(lineThicknessPixels, 0.5);
+	float mask = 0.0;
+	mask = max(mask, lineMask(uv.x, 1.0 / 3.0, thickness, resolution.x));
+	mask = max(mask, lineMask(uv.x, 2.0 / 3.0, thickness, resolution.x));
+	mask = max(mask, lineMask(uv.y, 1.0 / 3.0, thickness, resolution.y));
+	mask = max(mask, lineMask(uv.y, 2.0 / 3.0, thickness, resolution.y));
+	return mask;
+}
+
+float crosshairMask(float2 uv, float2 resolution)
+{
+	float2 pixel = (uv - 0.5) * resolution;
+	float halfThickness = max(lineThicknessPixels, 0.5) * 0.5;
+	float halfSize = max(crosshairSizePixels, 1.0) * 0.5;
+	float halfGap = max(crosshairGapPixels, 0.0) * 0.5;
+
+	float horizontalExtent = step(abs(pixel.x), halfSize) * (1.0 - step(abs(pixel.x), halfGap));
+	float verticalExtent = step(abs(pixel.y), halfSize) * (1.0 - step(abs(pixel.y), halfGap));
+
+	float horizontalLine = horizontalExtent * (1.0 - smoothstep(halfThickness, halfThickness + 1.5, abs(pixel.y)));
+	float verticalLine = verticalExtent * (1.0 - smoothstep(halfThickness, halfThickness + 1.5, abs(pixel.x)));
+	return max(horizontalLine, verticalLine);
+}
+
+float4 shadeVideo(ShaderContext context)
+{
+	float2 resolution = max(context.outputResolution, float2(1.0, 1.0));
+	float mask = 0.0;
+
+	if (showThirds)
+		mask = max(mask, thirdsMask(context.uv, resolution));
+	if (showCrosshair)
+		mask = max(mask, crosshairMask(context.uv, resolution));
+
+	float opacity = saturate(lineOpacity * lineColor.a) * mask;
+	float3 color = lerp(context.sourceColor.rgb, lineColor.rgb, opacity);
+	return float4(color, context.sourceColor.a);
+}