gdshader support (highlighting, tree-sitter, LSP)

queries/gdshader/highlights.scm

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+;; ===========================
+;; Godot Shader (GDShader) Highlights
+;; Extended: multi-line comments + preprocessor
+;; ===========================
+
+;; --- Shader types ---
+((identifier) @type
+  (#match? @type "^(spatial|canvas_item|particles|sky)$"))
+
+;; --- Shader stages ---
+((identifier) @keyword
+  (#match? @keyword "^(vertex|fragment|light|start)$"))
+
+;; --- Built-in functions ---
+((identifier) @function.builtin
+  (#match? @function.builtin
+    "^(abs|acos|asin|atan|ceil|clamp|cos|cross|cross2d|distance|dot|exp|floor|fract|inverse|length|lerp|max|min|normalize|pow|reflect|refract|round|sign|sin|sqrt|step|tan|transpose)$"))
+
+;; --- Godot-specific built-in functions ---
+((identifier) @function.builtin
+  (#match? @function.builtin
+    "^(NODE_POSITION_WORLD|VIEWPORT_SIZE|VIEWPORT_TEXTURE|INV_CAMERA_MATRIX|CAMERA_MATRIX|NODE_MATRIX|NODE_MATRIX_INVERSE|WORLD_MATRIX|WORLD_MATRIX_INVERSE|CAMERA_DIRECTION|SCREEN_TEXTURE|TIME)$"))
+
+;; --- Built-in constants / vars ---
+((identifier) @constant.builtin
+  (#match? @constant.builtin
+    "^(TIME|PI|TAU|E|FRAGCOORD|VERTEX|NORMAL|UV|UV2|COLOR|INSTANCE_ID|POINT_COORD|SCREEN_UV|SCREEN_PIXEL_SIZE|FRONT_FACING)$"))
+
+;; --- Keywords ---
+((identifier) @keyword
+  (#match? @keyword "^(uniform|varying|const|if|else|elif|for|while|break|continue|return|discard|void|in|out|inout)$"))
+
+;; --- Types ---
+((identifier) @type
+  (#match? @type "^(bool|int|float|vec2|vec3|vec4|mat3|mat4|sampler2D|samplerCube)$"))
+
+;; --- Operators ---
+((operator) @operator
+  (#match? @operator "^[+\\-*/%=!<>&|^~]+$"))
+
+;; --- Numbers ---
+((number) @number
+  (#match? @number "^[0-9]+(\\.[0-9]+)?$"))
+
+;; --- Single-line comments ---
+((comment) @comment
+  (#match? @comment "^//.*$"))
+
+;; --- Multi-line comments ---
+((comment) @comment
+  (#match? @comment "^/\\*.*\\*/$"))
+
+;; --- Preprocessor / directives ---
+((preproc) @keyword
+  (#match? @preproc "^#(version|ifdef|ifndef|else|elif|endif|define|undef|extension|error|pragma)$"))

queries/gdshader/injections.scm

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+;; ===========================
+;; GDShader Injections
+;; ===========================
+
+;; Highlight expressions inside parentheses as code
+((call_expression
+  function: (identifier) @function
+  arguments: (argument_list) @parameter))
+
+;; Highlight numbers inside function calls
+((number) @number
+  (#match? @number "^[0-9]+(\\.[0-9]+)?$"))
+
+;; Highlight vector constructors like vec2, vec3, vec4
+((identifier) @type
+  (#match? @type "^(vec2|vec3|vec4|mat3|mat4)$"))
+
+;; Highlight boolean literals inside expressions
+((true) @boolean)
+((false) @boolean)