426 lines
17 KiB
EmacsLisp
426 lines
17 KiB
EmacsLisp
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;;; shaderlab-mode-el -- Major mode for editing Shaderlab files
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;; Author: Simon Carter <bbbscarter@gmail.com>
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;; Created: 1 August 2011
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;; Keywords: Shaderlab languages
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;; Copyright (C) 2011 Simon Carter <bbbscarter@gmail.com>
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2 of
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;; the License, or (at your option) any later version.
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;; This program is distributed in the hope that it will be
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;; useful, but WITHOUT ANY WARRANTY; without even the implied
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;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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;; PURPOSE. See the GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public
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;; License along with this program; if not, write to the Free
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;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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;; MA 02111-1307 USA
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;;; Commentary:
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;; Borrows heavily from cg-mode.el for syntax highlighting.
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;; In addition, provides custom indentation, and works with other
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;; shaderlab structures, such as material blocks, subshaders, etc.
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;;; Code:
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(defconst shaderlab-font-lock-keywords-1 nil
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"Subdued level highlighting for shaderlab mode.")
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(defconst shaderlab-font-lock-keywords-2 nil
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"Medium level highlighting for Shaderlab mode.
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See also `shaderlab-font-lock-extra-types'.")
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(defconst shaderlab-font-lock-keywords-3 nil
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"Gaudy level highlighting for Shaderlab mode.
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See also `shaderlab-font-lock-extra-types'.")
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;; taken largely from the c mode from font-lock.el
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(let* ((shaderlab-keywords
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(eval-when-compile
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(regexp-opt '("break" "continue" "do" "else" "for" "if" "return"
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"while"
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"asm" "asm_fragment"
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"technique" "pass" "compile"
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"in" "out" "inout"
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"typedef" "static" "const" "uniform" "packed"
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"Shader" "Properties" "SubShader" "Pass"
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"Material"
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"Tags" "LOD" "Cull"
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"CGPROGRAM" "ENDCG"
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"Fallback"))))
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(shaderlab-type-specs
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(eval-when-compile
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(regexp-opt '("struct" "interface"))))
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(shaderlab-type-specs-depth
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(regexp-opt-depth shaderlab-type-specs))
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(shaderlab-type-names
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`(mapconcat 'identity
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(cons
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,(eval-when-compile
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(regexp-opt
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'("void" "string"
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"fragout" "fragout_float"
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"sampler" "sampler1D" "sampler2D" "sampler3D"
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"samplerCube" "samplerRECT"
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"SurfaceOutput")))
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'("\\(bool\\|double\\|c?float\\|fixed\\|half\\|c?int\\)\\([1234]\\(x[1234]\\)?\\)?"))
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"\\|"))
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(shaderlab-type-names-depth
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`(regexp-opt-depth ,shaderlab-type-names))
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(shaderlab-reserved-names
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(eval-when-compile
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(regexp-opt
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;; reserved but not supported (Cg is UGLY!)
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'("short" "dword" "long" "signed"
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"auto" "catch" "char" "class" "column major"
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"const_cast" "decl" "default" "delete"
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"discard" "dynamic_cast" "emit" "enum" "explicit"
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"extern" "friend" "get" "goto" "inline"
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"long" "mutable" "namespace" "new" "operator"
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"pixelfragment" "pixelshader" "private"
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"protected" "public" "register" "reinterpret_cast"
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"row_major" "sampler_state" "shared" "sizeof"
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"static_cast" "template" "this" "throw"
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"try" "typeid" "typename" "union" "using"
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"virtual" "volatile" "__identifier"
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"switch" "case" "default"))))
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(shaderlab-reserved-names-depth
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`(regexp-opt-depth ,shaderlab-reserved-names))
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(shaderlab-bindings
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(eval-when-compile
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(regexp-opt
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'("COLOR" "COLOR0" "COLOR1" "COLOR2" "COLOR3"
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"POSITION" "BLENDWEIGHT" "NORMAL" "DIFFUSE"
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"SPECULAR" "FOGCOORD" "PSIZE" "ATTR6" "TANGENT"
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"TEXCOORD0" "TEXCOORD1" "TEXCOORD2" "TEXCOORD3"
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"TEXCOORD4" "TEXCOORD5" "TEXCOORD6" "TEXCOORD7"
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"HPOS" "PSIZ" "FOG" "FOGC" "COL0" "COL1" "BCOL0"))))
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(shaderlab-bindings-depth
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(regexp-opt-depth shaderlab-bindings))
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(shaderlab-math-calls
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(eval-when-compile
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(regexp-opt
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'(;; Mathmatical Functions
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"abs" "acos" "all" "any" "asin" "atan" "atan2" "ceil" "clamp"
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"cos" "cosh" "cross" "degrees" "determinant" "dot" "exp" "exp2"
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"floor" "fmod" "frac" "frexp" "isfinite" "isinf" "isnan" "ldexp"
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"lerp" "lit" "log" "log2" "log10" "max" "min" "modf" "mul" "noise"
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"pow" "radians" "round" "rsqrt" "saturate" "sign" "sin" "sincos"
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"sinh" "smoothstep" "step" "sqrt" "tan" "tanh" "transpose"
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;; Geometric Functions
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"distance" "faceforward" "length" "normalize" "reflect" "refract"
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;; Texture Map Functions
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"tex1D" "tex1Dproj" "tex2D" "tex2Dproj" "texRECT" "texRECTproj"
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"tex3D" "tex3Dproj" "texCUBE texCUBEproj"
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;; Derivitive Functions
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"ddx" "ddy"
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;; Debugging Function
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"debug"
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))))
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(shaderlab-math-calls-depth
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(regexp-opt-depth shaderlab-math-calls))
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(shaderlab-preprocessor-directives
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(eval-when-compile
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(regexp-opt
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'("define" "else" "endif" "if" "ifdef" "elif"
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"ifndef" "include" "line" "pragma" "undef"))))
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(shaderlab-preprocessor-directives-depth
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(regexp-opt-depth shaderlab-preprocessor-directives)))
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(setq shaderlab-font-lock-keywords-1
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(list
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;;
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;; These are all anchored at the beginning of line for speed.
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;;
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;; Fontify function name definitions (GNU style; without type on line).
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'("^\\(\\sw+\\)[ \t]*(" 1 font-lock-function-name-face)
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;;
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;'("\".*\"" . font-lock-string-face)
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;; Fontify error directives.
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'("^#[ \t]*error[ \t]+\\(.+\\)" 1 font-lock-warning-face prepend)
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;;
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;; Fontify filenames in #include <...> preprocessor directives as strings.
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'("^#[ \t]*\\(import\\|include\\)[ \t]*\\(<[^>\"\n]*>?\\)"
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2 font-lock-string-face)
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;;
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;; Fontify function macro names.
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'("^#[ \t]*define[ \t]+\\(\\sw+\\)(" 1 font-lock-function-name-face)
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;;
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;; Fontify symbol names in #if ... defined preprocessor directives.
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'("^#[ \t]*\\(elif\\|if\\)\\>"
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("\\<\\(defined\\)\\>[ \t]*(?\\(\\sw+\\)?" nil nil
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(1 font-lock-builtin-face) (2 font-lock-variable-name-face nil t)))
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;;
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;; Fontify otherwise as symbol names, and the preprocessor directive names.
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(list
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(concat "^#[ \t]*\\(" shaderlab-preprocessor-directives
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"\\)\\>[ \t!]*\\(\\sw+\\)?")
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'(1 font-lock-builtin-face)
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(list (+ 2 shaderlab-preprocessor-directives-depth)
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'font-lock-variable-name-face nil t))))
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(setq shaderlab-font-lock-keywords-2
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(append shaderlab-font-lock-keywords-1
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(list
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;;
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;; Simple regexps for speed.
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;;
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;; Fontify all type names.
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`(eval .
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(cons (concat "\\<\\(" ,shaderlab-type-names "\\)\\>") 'font-lock-type-face))
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;;
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;; Fontify all bindings.
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`(eval .
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(cons (concat "\\<\\(" ,shaderlab-bindings "\\)\\>") 'font-lock-constant-face))
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;;
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;; Fontify all math calls.
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`(eval .
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(cons (concat "\\<\\(" ,shaderlab-math-calls "\\)\\>") 'font-lock-builtin-face))
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;;
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;; Fontify reserved but unimplemented keywords
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`(eval .
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(cons (concat "\\<\\(" ,shaderlab-reserved-names "\\)\\>") 'font-lock-warning-face))
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;;
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;; Fontify all builtin keywords (except case, default and goto; see below).
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(concat "\\<\\(" shaderlab-keywords "\\|" shaderlab-type-specs "\\)\\>")
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;;
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;; Fontify case/goto keywords and targets, and case default/goto tags.
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'("\\<\\(case\\|goto\\)\\>"
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(1 font-lock-keyword-face)
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("\\(-[0-9]+\\|\\sw+\\)"
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;; Return limit of search.
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(save-excursion (skip-chars-forward "^:\n") (point))
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nil
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(1 font-lock-constant-face nil t)))
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;; Anders Lindgren <andersl@andersl.com> points out that it is quicker to
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;; use MATCH-ANCHORED to effectively anchor the regexp on the left.
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;; This must come after the one for keywords and targets.
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'(":" ("^[ \t]*\\(\\sw+\\)[ \t]*:[ \t]*$"
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(beginning-of-line) (end-of-line)
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(1 font-lock-constant-face)))
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)))
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(setq shaderlab-font-lock-keywords-3
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(append shaderlab-font-lock-keywords-2
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;;
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;; More complicated regexps for more complete highlighting for types.
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;; We still have to fontify type specifiers individually, as C is so hairy.
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(list
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;;
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;; Fontify builtin true and false constants
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'("\\(true\\|false\\)" 1 font-lock-constant-face)
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;;
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;; Fontify all storage types, plus their items.
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`(eval .
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(list (concat "\\<\\(" ,shaderlab-type-names "\\)\\>"
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"\\([ \t*&]+\\sw+\\>\\)*")
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;; Fontify each declaration item.
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(list 'font-lock-match-c-style-declaration-item-and-skip-to-next
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;; Start with point after all type specifiers.
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(list 'goto-char (list 'or
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(list 'match-beginning
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(+ ,shaderlab-type-names-depth 2))
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'(match-end 1)))
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;; Finish with point after first type specifier.
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'(goto-char (match-end 1))
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;; Fontify as a variable or function name.
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'(1 (if (match-beginning 2)
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font-lock-function-name-face
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font-lock-variable-name-face)))))
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;;
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;; Fontify all storage specs and types, plus their items.
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`(eval .
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(list (concat "\\<\\(" ,shaderlab-type-specs "\\)\\>"
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"[ \t]*\\(\\sw+\\)?")
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(list 1 'font-lock-keyword-face)
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(list ,(+ shaderlab-type-specs-depth 2) 'font-lock-type-face nil t)
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(list 'font-lock-match-c-style-declaration-item-and-skip-to-next
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nil
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;; Finish with point after the variable name if
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;; there is one.
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`(if (match-end 2)
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(goto-char (match-end 2)))
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;; Fontify as a variable or function name.
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'(1 (if (match-beginning 2)
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font-lock-function-name-face
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font-lock-variable-name-face) nil t))))
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;;
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;; Fontify structures, or typedef names, plus their items.
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'("\\(}\\)[ \t*]*\\sw"
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(font-lock-match-c-style-declaration-item-and-skip-to-next
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(goto-char (match-end 1)) nil
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(1 font-lock-type-face)))
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;;
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;; Fontify anything at beginning of line as a declaration or definition.
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'("^\\(\\sw+\\)\\>\\([ \t*]+\\sw+\\>\\)*"
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(1 font-lock-type-face)
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(font-lock-match-c-style-declaration-item-and-skip-to-next
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(goto-char (or (match-beginning 2) (match-end 1))) nil
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(1 (if (match-beginning 2)
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font-lock-function-name-face
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font-lock-variable-name-face))))
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)))
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)
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(defvar shaderlab-font-lock-keywords shaderlab-font-lock-keywords-3
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"Default expressions to highlight in C mode.
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See also `shaderlab-font-lock-extra-types'.")
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(defvar shaderlab-mode-hook nil)
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(defvar shaderlab-mode-map
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(let ((shaderlab-mode-map (make-keymap)))
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(define-key shaderlab-mode-map "\C-j" 'newline-and-indent)
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shaderlab-mode-map)
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"Keymap for SHADERLAB major mode")
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(define-derived-mode shaderlab-mode text-mode "Shaderlab"
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"Major mode for editing shaderlab shaders.
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\\{shaderlab-mode-map}"
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(set-syntax-table shaderlab-mode-syntax-table2)
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(set (make-local-variable 'font-lock-defaults) '(shaderlab-font-lock-keywords))
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;; Register our indentation function
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(set (make-local-variable 'indent-line-function) 'shaderlab-indent-line)
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)
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(add-to-list 'auto-mode-alist '("\\.shader" . shaderlab-mode))
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(defun shaderlab-indent-line ()
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"Indent current line as SHADERLAB code."
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(interactive)
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(beginning-of-line)
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(let ((regexp-closing-brace "^[^ \\W\n]*};?\\w*")
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(regexp-opening-brace "^.*{\\w*$")
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(regexp-empty-line "^[\t ]*\n"))
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(let ((not-indented t) cur-indent)
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(cond ((bobp)
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;(message "bobp")
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(setq cur-indent 0))
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((looking-at regexp-closing-brace) ; If the line we are looking at is the end of a block, then decrease the indentation
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;(message "Closing brace")
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(save-excursion
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;Look backwards for a non-whitespace block or an opening brace
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(let ((looking-for-line t))
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(while looking-for-line
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(forward-line -1)
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(cond ((looking-at regexp-opening-brace)
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(setq cur-indent (current-indentation))
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(setq looking-for-line nil))
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((not (looking-at regexp-empty-line))
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(setq cur-indent (- (current-indentation) default-tab-width))
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(setq looking-for-line nil))))))
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(when (< cur-indent 0) ; We can't indent past the left margin
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(setq cur-indent 0)))
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((looking-at "^\\W*#")
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(message "preprocessor")
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(setq cur-indent 0))
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(t (save-excursion
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|
(while not-indented ; Iterate backwards until we find an indentation hint
|
||
|
|
(forward-line -1)
|
||
|
|
(cond ((looking-at regexp-closing-brace) ; This hint indicates that we need to indent at the level of the END_ token
|
||
|
|
;(message "Found closing brace at %s" (what-line))
|
||
|
|
(setq cur-indent (current-indentation))
|
||
|
|
(setq not-indented nil))
|
||
|
|
((looking-at regexp-opening-brace) ; This hint indicates that we need to indent an extra level
|
||
|
|
;(message "Found opening brace at %s" (what-line))
|
||
|
|
(setq cur-indent (+ (current-indentation) default-tab-width)) ; Do the actual indenting
|
||
|
|
(setq not-indented nil))
|
||
|
|
((bobp)
|
||
|
|
(setq not-indented nil)))))))
|
||
|
|
(if cur-indent
|
||
|
|
(progn
|
||
|
|
;(message "Indenting to %d" cur-indent)
|
||
|
|
(indent-line-to cur-indent))
|
||
|
|
;(message "not indenting!")
|
||
|
|
(indent-line-to 0))))) ; If we didn't see an indentation hint, then allow no indentation
|
||
|
|
|
||
|
|
|
||
|
|
(defvar shaderlab-mode-syntax-table
|
||
|
|
(let ((table (make-syntax-table)))
|
||
|
|
|
||
|
|
;; Populate the syntax TABLE
|
||
|
|
(modify-syntax-entry ?_ "_" table)
|
||
|
|
;(modify-syntax-entry ?_ "w" table)
|
||
|
|
(modify-syntax-entry ?\\ "\\" table)
|
||
|
|
(modify-syntax-entry ?+ "." table)
|
||
|
|
(modify-syntax-entry ?- "." table)
|
||
|
|
(modify-syntax-entry ?= "." table)
|
||
|
|
(modify-syntax-entry ?% "." table)
|
||
|
|
(modify-syntax-entry ?< "." table)
|
||
|
|
(modify-syntax-entry ?> "." table)
|
||
|
|
(modify-syntax-entry ?& "." table)
|
||
|
|
(modify-syntax-entry ?| "." table)
|
||
|
|
(modify-syntax-entry ?\' "\"" table)
|
||
|
|
;; Set up block and line oriented comments. The new C standard
|
||
|
|
;; mandates both comment styles even in C, so since all languages
|
||
|
|
;; now require dual comments, we make this the default.
|
||
|
|
;;(cond
|
||
|
|
;; Emacs 22 and higher do nothing
|
||
|
|
;; ((>= emacs-major-version 22))
|
||
|
|
;; XEmacs 19 & 20
|
||
|
|
;; ((memq '8-bit c-emacs-features)
|
||
|
|
;; (modify-syntax-entry ?/ ". 1456" table)
|
||
|
|
;; (modify-syntax-entry ?* ". 23" table))
|
||
|
|
;; Emacs 19 & 20
|
||
|
|
;; ((memq '1-bit c-emacs-features)
|
||
|
|
;; (modify-syntax-entry ?/ ". 124b" table)
|
||
|
|
;; (modify-syntax-entry ?* ". 23" table))
|
||
|
|
;; incompatible
|
||
|
|
;; (t (error "Shaderlab Mode is incompatible with this version of Emacs"))
|
||
|
|
;; )
|
||
|
|
(modify-syntax-entry ?\n "> b" table)
|
||
|
|
;; Give CR the same syntax as newline, for selective-display
|
||
|
|
(modify-syntax-entry ?\^m "> b" table)
|
||
|
|
table)
|
||
|
|
"Syntax table for shaderlab-mode")
|
||
|
|
|
||
|
|
(provide 'shaderlab-mode)
|
||
|
|
|
||
|
|
(defun shaderlab-populate-syntax-table (table)
|
||
|
|
"Populate the given syntax table as necessary for a C-like language.
|
||
|
|
This includes setting ' and \" as string delimiters, and setting up
|
||
|
|
the comment syntax to handle both line style \"//\" and block style
|
||
|
|
\"/*\" \"*/\" comments."
|
||
|
|
|
||
|
|
(modify-syntax-entry ?_ "w" table)
|
||
|
|
;(modify-syntax-entry ?_ "_" table)
|
||
|
|
(modify-syntax-entry ?\\ "\\" table)
|
||
|
|
(modify-syntax-entry ?+ "." table)
|
||
|
|
(modify-syntax-entry ?- "." table)
|
||
|
|
(modify-syntax-entry ?= "." table)
|
||
|
|
(modify-syntax-entry ?% "." table)
|
||
|
|
(modify-syntax-entry ?< "." table)
|
||
|
|
(modify-syntax-entry ?> "." table)
|
||
|
|
(modify-syntax-entry ?& "." table)
|
||
|
|
(modify-syntax-entry ?| "." table)
|
||
|
|
(modify-syntax-entry ?\' "\"" table)
|
||
|
|
(modify-syntax-entry ?\240 "." table)
|
||
|
|
|
||
|
|
;; Set up block and line oriented comments. The new C
|
||
|
|
;; standard mandates both comment styles even in C, so since
|
||
|
|
;; all languages now require dual comments, we make this the
|
||
|
|
;; default.
|
||
|
|
(modify-syntax-entry ?/ ". 124b" table)
|
||
|
|
(modify-syntax-entry ?* ". 23" table)
|
||
|
|
|
||
|
|
(modify-syntax-entry ?\n "> b" table)
|
||
|
|
;; Give CR the same syntax as newline, for selective-display
|
||
|
|
(modify-syntax-entry ?\^m "> b" table)
|
||
|
|
table)
|
||
|
|
|
||
|
|
|
||
|
|
(defvar shaderlab-mode-syntax-table2
|
||
|
|
(let ((shaderlab-mode-syntax-table2 (shaderlab-populate-syntax-table (make-syntax-table))))
|
||
|
|
shaderlab-mode-syntax-table2)
|
||
|
|
"Syntax table for shaderlab-mode")
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;;; shaderlab-mode.el ends here
|