Added support for HLSL (#2318)

https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl

components.json

@@ -437,6 +437,11 @@
 			"title": "HCL",
 			"owner": "outsideris"
 		},
+		"hlsl": {
+			"title": "HLSL",
+			"require": "c",
+			"owner": "RunDevelopment"
+		},
 		"http": {
 			"title": "HTTP",
 			"optional": [

components/prism-hlsl.js

@@ -0,0 +1,20 @@
+Prism.languages.hlsl = Prism.languages.extend('c', {
+
+	// Regarding keywords and class names:
+	// The list of all keywords was split into 'keyword' and 'class-name' tokens based on whether they are capitalized.
+	// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-appendix-keywords
+	// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-appendix-reserved-words
+	'class-name': [
+		Prism.languages.c['class-name'],
+		/\b(?:AppendStructuredBuffer|BlendState|Buffer|ByteAddressBuffer|CompileShader|ComputeShader|ConsumeStructuredBuffer|DepthStencilState|DepthStencilView|DomainShader|GeometryShader|Hullshader|InputPatch|LineStream|OutputPatch|PixelShader|PointStream|RasterizerState|RenderTargetView|RWBuffer|RWByteAddressBuffer|RWStructuredBuffer|RWTexture(?:1D|1DArray|2D|2DArray|3D)|SamplerComparisonState|SamplerState|StructuredBuffer|Texture(?:1D|1DArray|2D|2DArray|2DMS|2DMSArray|3D|Cube|CubeArray)|TriangleStream|VertexShader)\b/
+	],
+	'keyword': [
+		// HLSL keyword
+		/\b(?:asm|asm_fragment|auto|break|case|catch|cbuffer|centroid|char|class|column_major|compile|compile_fragment|const|const_cast|continue|default|delete|discard|do|dynamic_cast|else|enum|explicit|export|extern|for|friend|fxgroup|goto|groupshared|if|in|inline|inout|interface|line|lineadj|linear|long|matrix|mutable|namespace|new|nointerpolation|noperspective|operator|out|packoffset|pass|pixelfragment|point|precise|private|protected|public|register|reinterpret_cast|return|row_major|sample|sampler|shared|short|signed|sizeof|snorm|stateblock|stateblock_state|static|static_cast|string|struct|switch|tbuffer|technique|technique10|technique11|template|texture|this|throw|triangle|triangleadj|try|typedef|typename|uniform|union|unorm|unsigned|using|vector|vertexfragment|virtual|void|volatile|while)\b/,
+		// scalar, vector, and matrix types
+		/\b(?:bool|double|dword|float|half|int|min(?:10float|12int|16(?:float|int|uint))|uint)(?:[1-4](?:x[1-4])?)?\b/
+	],
+	// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-appendix-grammar#floating-point-numbers
+	'number': /(?:(?:\b\d+\.?\d*|\B\.\d+)(?:[eE][+-]?\d+)?|\b0x[\da-fA-F]+)[fFhHlLuU]?\b/,
+	'boolean': /\b(?:false|true)\b/
+});

examples/prism-hlsl.html

@@ -0,0 +1,18 @@
+<h2>Full example</h2>
+<pre><code>// Source: https://github.com/mellinoe/veldrid/blob/d60e5a036add2123a15f0da02f1da65a80503d54/src/Veldrid.ImGui/Assets/HLSL/imgui-frag.hlsl
+
+struct PS_INPUT
+{
+	float4 pos : SV_POSITION;
+	float4 col : COLOR0;
+	float2 uv  : TEXCOORD0;
+};
+
+Texture2D FontTexture : register(t0);
+sampler FontSampler : register(s0);
+
+float4 FS(PS_INPUT input) : SV_Target
+{
+	float4 out_col = input.col * FontTexture.Sample(FontSampler, input.uv);
+	return out_col;
+}</code></pre>

plugins/autoloader/prism-autoloader.js

@@ -49,6 +49,7 @@
 		"haml": "ruby",
 		"handlebars": "markup-templating",
 		"haxe": "clike",
+		"hlsl": "c",
 		"java": "clike",
 		"javadoc": [
 			"markup",

plugins/show-language/prism-show-language.js

@@ -74,6 +74,7 @@
 		"graphql": "GraphQL",
 		"hs": "Haskell",
 		"hcl": "HCL",
+		"hlsl": "HLSL",
 		"http": "HTTP",
 		"hpkp": "HTTP Public-Key-Pins",
 		"hsts": "HTTP Strict-Transport-Security",