1 files changed, 109 insertions, 0 deletions
diff --git a/lexlua/glsl.lua b/lexlua/glsl.lua
new file mode 100644
index 000000000..497d81636
--- /dev/null
+++ b/lexlua/glsl.lua
@@ -0,0 +1,109 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- GLSL LPeg lexer.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('glsl', {inherit = lexer.load('cpp')})
+
+-- Whitespace.
+lex:modify_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:modify_rule('keyword', token(lexer.KEYWORD, word_match[[
+  attribute const in inout out uniform varying invariant centroid flat smooth
+  noperspective layout patch sample subroutine lowp mediump highp precision
+  -- Macros.
+  __VERSION__ __LINE__ __FILE__
+]]) + lex:get_rule('keyword'))
+
+-- Types.
+lex:modify_rule('type',
+                token(lexer.TYPE,
+                      S('bdiu')^-1 * 'vec' * R('24') +
+                      P('d')^-1 * 'mat' * R('24') * ('x' * R('24')^-1) +
+                      S('iu')^-1 * 'sampler' * R('13') * 'D' +
+                      'sampler' * R('12') * 'D' * P('Array')^-1 * 'Shadow' +
+                      S('iu')^-1 * 'sampler' * (R('12') * 'DArray' +
+                                                word_match[[
+                        Cube 2DRect Buffer 2DMS 2DMSArray 2DMSCubeArray
+                      ]]) +
+                      word_match[[
+                        samplerCubeShadow sampler2DRectShadow
+                        samplerCubeArrayShadow
+                      ]]) +
+                lex:get_rule('type') +
+
+-- Functions.
+token(lexer.FUNCTION, word_match[[
+  radians degrees sin cos tan asin acos atan sinh cosh tanh asinh acosh atanh
+  pow exp log exp2 log2 sqrt inversesqrt abs sign floor trunc round roundEven
+  ceil fract mod modf min max clamp mix step smoothstep isnan isinf
+  floatBitsToInt floatBitsToUint intBitsToFloat uintBitsToFloat fma frexp ldexp
+  packUnorm2x16 packUnorm4x8 packSnorm4x8 unpackUnorm2x16 unpackUnorm4x8
+  unpackSnorm4x8 packDouble2x32 unpackDouble2x32 length distance dot cross
+  normalize ftransform faceforward reflect refract matrixCompMult outerProduct
+  transpose determinant inverse lessThan lessThanEqual greaterThan
+  greaterThanEqual equal notEqual any all not uaddCarry usubBorrow umulExtended
+  imulExtended bitfieldExtract bitfildInsert bitfieldReverse bitCount findLSB
+  findMSB textureSize textureQueryLOD texture textureProj textureLod
+  textureOffset texelFetch texelFetchOffset textureProjOffset textureLodOffset
+  textureProjLod textureProjLodOffset textureGrad textureGradOffset
+  textureProjGrad textureProjGradOffset textureGather textureGatherOffset
+  texture1D texture2D texture3D texture1DProj texture2DProj texture3DProj
+  texture1DLod texture2DLod texture3DLod texture1DProjLod texture2DProjLod
+  texture3DProjLod textureCube textureCubeLod shadow1D shadow2D shadow1DProj
+  shadow2DProj shadow1DLod shadow2DLod shadow1DProjLod shadow2DProjLod dFdx dFdy
+  fwidth interpolateAtCentroid interpolateAtSample interpolateAtOffset noise1
+  noise2 noise3 noise4 EmitStreamVertex EndStreamPrimitive EmitVertex
+  EndPrimitive barrier
+]]) +
+
+-- Variables.
+token(lexer.VARIABLE, word_match[[
+  gl_VertexID gl_InstanceID gl_Position gl_PointSize gl_ClipDistance
+  gl_PrimitiveIDIn gl_InvocationID gl_PrimitiveID gl_Layer gl_PatchVerticesIn
+  gl_TessLevelOuter gl_TessLevelInner gl_TessCoord gl_FragCoord gl_FrontFacing
+  gl_PointCoord gl_SampleID gl_SamplePosition gl_FragColor gl_FragData
+  gl_FragDepth gl_SampleMask gl_ClipVertex gl_FrontColor gl_BackColor
+  gl_FrontSecondaryColor gl_BackSecondaryColor gl_TexCoord gl_FogFragCoord
+  gl_Color gl_SecondaryColor gl_Normal gl_Vertex gl_MultiTexCoord0
+  gl_MultiTexCoord1 gl_MultiTexCoord2 gl_MultiTexCoord3 gl_MultiTexCoord4
+  gl_MultiTexCoord5 gl_MultiTexCoord6 gl_MultiTexCoord7 gl_FogCoord
+]]) +
+
+-- Constants.
+token(lexer.CONSTANT, word_match[[
+  gl_MaxVertexAttribs gl_MaxVertexUniformComponents gl_MaxVaryingFloats
+  gl_MaxVaryingComponents gl_MaxVertexOutputComponents
+  gl_MaxGeometryInputComponents gl_MaxGeometryOutputComponents
+  gl_MaxFragmentInputComponents gl_MaxVertexTextureImageUnits
+  gl_MaxCombinedTextureImageUnits gl_MaxTextureImageUnits
+  gl_MaxFragmentUniformComponents gl_MaxDrawBuffers gl_MaxClipDistances
+  gl_MaxGeometryTextureImageUnits gl_MaxGeometryOutputVertices
+  gl_MaxGeometryTotalOutputComponents gl_MaxGeometryUniformComponents
+  gl_MaxGeometryVaryingComponents gl_MaxTessControlInputComponents
+  gl_MaxTessControlOutputComponents gl_MaxTessControlTextureImageUnits
+  gl_MaxTessControlUniformComponents gl_MaxTessControlTotalOutputComponents
+  gl_MaxTessEvaluationInputComponents gl_MaxTessEvaluationOutputComponents
+  gl_MaxTessEvaluationTextureImageUnits gl_MaxTessEvaluationUniformComponents
+  gl_MaxTessPatchComponents gl_MaxPatchVertices gl_MaxTessGenLevel
+  gl_MaxTextureUnits gl_MaxTextureCoords gl_MaxClipPlanes
+
+  gl_DepthRange gl_ModelViewMatrix gl_ProjectionMatrix
+  gl_ModelViewProjectionMatrix gl_TextureMatrix gl_NormalMatrix
+  gl_ModelViewMatrixInverse gl_ProjectionMatrixInverse
+  gl_ModelViewProjectionMatrixInverse gl_TextureMatrixInverse
+  gl_ModelViewMatrixTranspose gl_ProjectionMatrixTranspose
+  gl_ModelViewProjectionMatrixTranspose gl_TextureMatrixTranspose
+  gl_ModelViewMatrixInverseTranspose gl_ProjectionMatrixInverseTranspose
+  gl_ModelViewProjectionMatrixInverseTranspose gl_TextureMatrixInverseTranspose
+  gl_NormalScale gl_ClipPlane gl_Point gl_FrontMaterial gl_BackMaterial
+  gl_LightSource gl_LightModel gl_FrontLightModelProduct
+  gl_BackLightModelProduct gl_FrontLightProduct gl_BackLightProduct
+  gl_TextureEnvColor gl_EyePlaneS gl_EyePlaneT gl_EyePlaneR gl_EyePlaneQ
+  gl_ObjectPlaneS gl_ObjectPlaneT gl_ObjectPlaneR gl_ObjectPlaneQ gl_Fog
+]]))
+
+return lex