more shaders and updates/changes

shaders/video-transform/shader.json

@@ -47,6 +47,35 @@
       "step": 0.1,
       "description": "Rotates the source image around the frame center."
     },
+    {
+      "id": "cropAspect",
+      "label": "Crop Aspect",
+      "type": "enum",
+      "default": "none",
+      "options": [
+        {
+          "value": "none",
+          "label": "None"
+        },
+        {
+          "value": "4x3",
+          "label": "4:3"
+        },
+        {
+          "value": "3x2",
+          "label": "3:2"
+        },
+        {
+          "value": "1x1",
+          "label": "1:1"
+        },
+        {
+          "value": "9x16",
+          "label": "9:16"
+        }
+      ],
+      "description": "Crops the visible image to a centered preset aspect ratio without squeezing the source."
+    },
     {
       "id": "edgeMode",
       "label": "Edge Mode",

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;