Added slang shaders for hdr and graphics pipeline library samples

shaders/slang/hdr/bloom.slang

@@ -0,0 +1,80 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float2 UV;
+};
+
+Sampler2D samplerColor0;
+Sampler2D samplerColor1;
+
+[[SpecializationConstant]] const int dir = 0;
+
+[shader("vertex")]
+VSOutput vertexMain(uint VertexIndex: SV_VertexID)
+{
+    VSOutput output;
+    output.UV = float2((VertexIndex << 1) & 2, VertexIndex & 2);
+    output.Pos = float4(output.UV * 2.0f - 1.0f, 0.0f, 1.0f);
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(VSOutput input)
+{
+	// From the OpenGL Super bible
+	const float weights[] = {	0.0024499299678342,
+								0.0043538453346397,
+								0.0073599963704157,
+								0.0118349786570722,
+								0.0181026699707781,
+								0.0263392293891488,
+								0.0364543006660986,
+								0.0479932050577658,
+								0.0601029809166942,
+								0.0715974486241365,
+								0.0811305381519717,
+								0.0874493212267511,
+								0.0896631113333857,
+								0.0874493212267511,
+								0.0811305381519717,
+								0.0715974486241365,
+								0.0601029809166942,
+								0.0479932050577658,
+								0.0364543006660986,
+								0.0263392293891488,
+								0.0181026699707781,
+								0.0118349786570722,
+								0.0073599963704157,
+								0.0043538453346397,
+								0.0024499299678342};
+
+
+	const float blurScale = 0.003;
+	const float blurStrength = 1.0;
+
+	float ar = 1.0;
+	// Aspect ratio for vertical blur pass
+	if (dir == 1)
+	{
+        float2 ts;
+        samplerColor1.GetDimensions(ts.x, ts.y);
+		ar = ts.y / ts.x;
+	}
+
+	float2 P = input.UV.yx - float2(0, (25 >> 1) * ar * blurScale);
+
+	float4 color = float4(0.0, 0.0, 0.0, 0.0);
+	for (int i = 0; i < 25; i++)
+	{
+        float2 dv = float2(0.0, i * blurScale) * ar;
+        color += samplerColor1.Sample(P + dv) * weights[i] * blurStrength;
+	}
+
+	return color;
+}