tests: Add avm2/pixelbender_rsqrt test

Author: kjarosh

tests/tests/swfs/avm2/pixelbender_rsqrt/Test.as

@@ -0,0 +1,36 @@
+package {
+import flash.display.*;
+import flash.geom.*;
+
+public class Test extends MovieClip {
+    [Embed(source = "rsqrt.pbj", mimeType="application/octet-stream")]
+    public static var ShaderBytes: Class;
+
+    public function Test() {
+        testParameter(0.0);
+        testParameter(1.0);
+        testParameter(5.0);
+        testParameter(9.0);
+        testParameter(16.0);
+        testParameter(256.0);
+        testParameter(-1.0);
+        testParameter(-16.0);
+    }
+
+    private function testParameter(value:Number) {
+        trace("Input: " + value);
+        var input = new BitmapData(1, 1);
+        var shaderJob = new ShaderJob(new Shader(new ShaderBytes()), input);
+
+        shaderJob.shader.data.inputValue.value = [value];
+
+        try {
+            shaderJob.start(true);
+            trace("Result: " + input.getPixel32(0, 0).toString(16));
+        } catch (e) {
+            trace("Error while starting: " + e);
+        }
+        trace("=================");
+    }
+}
+}

tests/tests/swfs/avm2/pixelbender_rsqrt/output.txt

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+Input: 0
+Result: ffffff00
+=================
+Input: 1
+Result: ffffff00
+=================
+Input: 5
+Result: ffff7200
+=================
+Input: 9
+Result: ffff5500
+=================
+Input: 16
+Result: ffff4000
+=================
+Input: 256
+Result: ffff1000
+=================
+Input: -1
+Result: ffff0000
+=================
+Input: -16
+Result: ffff0000
+=================

tests/tests/swfs/avm2/pixelbender_rsqrt/rsqrt.pbj

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+<languageVersion : 1.0;>
+
+kernel rsqrt
+<   namespace : "Ruffle Tests";
+    vendor : "Kamil Jarosz";
+    version : 1;
+>
+{
+    input image4 src;
+    output pixel4 dst;
+
+    parameter float inputValue
+    <
+        defaultValue:1.0;
+    >;
+
+    void
+    evaluatePixel()
+    {
+        dst = pixel4(1, inverseSqrt(inputValue), 0, 1);
+    }
+}

tests/tests/swfs/avm2/pixelbender_rsqrt/rsqrt.pbk

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+num_ticks = 1
+
+[player_options]
+with_renderer = { optional = false, sample_count = 4 }