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