more shaders and updates/changes

shaders/video-transform/shader.slang

@@ -28,8 +28,42 @@ float2 applyEdgeMode(float2 uv, out bool inside)
 	return uv;
 }
 
+float selectedCropAspect()
+{
+	if (cropAspect == 1)
+		return 4.0 / 3.0;
+	if (cropAspect == 2)
+		return 3.0 / 2.0;
+	if (cropAspect == 3)
+		return 1.0;
+	if (cropAspect == 4)
+		return 9.0 / 16.0;
+	return 0.0;
+}
+
+bool insideCropWindow(float2 uv, float2 resolution)
+{
+	float targetAspect = selectedCropAspect();
+	if (targetAspect <= 0.0)
+		return true;
+
+	float outputAspect = resolution.x / max(resolution.y, 1.0);
+	float2 cropSize = float2(1.0, 1.0);
+	if (outputAspect > targetAspect)
+		cropSize.x = targetAspect / outputAspect;
+	else
+		cropSize.y = outputAspect / targetAspect;
+
+	float2 cropMin = (1.0 - cropSize) * 0.5;
+	float2 cropMax = cropMin + cropSize;
+	return uv.x >= cropMin.x && uv.x <= cropMax.x && uv.y >= cropMin.y && uv.y <= cropMax.y;
+}
+
 float4 shadeVideo(ShaderContext context)
 {
+	if (!insideCropWindow(context.uv, max(context.outputResolution, float2(1.0, 1.0))))
+		return outsideColor;
+
 	float safeZoom = max(zoom, 0.001);
 	float2 sourceUv = (context.uv - 0.5) / safeZoom + 0.5;
 	sourceUv -= pan;