/*
Language: GLSL
Description: OpenGL Shading Language
Author: Sergey Tikhomirov <sergey@tikhomirov.io>
Category: graphics
*/

function(hljs) {
  return {
    keywords: {
      keyword:
        // Statements
        'break continue discard do else for if return while switch case default ' +
        // Qualifiers
        'attribute binding buffer ccw centroid centroid varying coherent column_major const cw ' +
        'depth_any depth_greater depth_less depth_unchanged early_fragment_tests equal_spacing ' +
        'flat fractional_even_spacing fractional_odd_spacing highp in index inout invariant ' +
        'invocations isolines layout line_strip lines lines_adjacency local_size_x local_size_y ' +
        'local_size_z location lowp max_vertices mediump noperspective offset origin_upper_left ' +
        'out packed patch pixel_center_integer point_mode points precise precision quads r11f_g11f_b10f '+
        'r16 r16_snorm r16f r16i r16ui r32f r32i r32ui r8 r8_snorm r8i r8ui readonly restrict ' +
        'rg16 rg16_snorm rg16f rg16i rg16ui rg32f rg32i rg32ui rg8 rg8_snorm rg8i rg8ui rgb10_a2 ' +
        'rgb10_a2ui rgba16 rgba16_snorm rgba16f rgba16i rgba16ui rgba32f rgba32i rgba32ui rgba8 ' +
        'rgba8_snorm rgba8i rgba8ui row_major sample shared smooth std140 std430 stream triangle_strip ' +
        'triangles triangles_adjacency uniform varying vertices volatile writeonly',
      type:
        'atomic_uint bool bvec2 bvec3 bvec4 dmat2 dmat2x2 dmat2x3 dmat2x4 dmat3 dmat3x2 dmat3x3 ' +
        'dmat3x4 dmat4 dmat4x2 dmat4x3 dmat4x4 double dvec2 dvec3 dvec4 float iimage1D iimage1DArray ' +
        'iimage2D iimage2DArray iimage2DMS iimage2DMSArray iimage2DRect iimage3D iimageBuffer' +
        'iimageCube iimageCubeArray image1D image1DArray image2D image2DArray image2DMS image2DMSArray ' +
        'image2DRect image3D imageBuffer imageCube imageCubeArray int isampler1D isampler1DArray ' +
        'isampler2D isampler2DArray isampler2DMS isampler2DMSArray isampler2DRect isampler3D ' +
        'isamplerBuffer isamplerCube isamplerCubeArray ivec2 ivec3 ivec4 mat2 mat2x2 mat2x3 ' +
        'mat2x4 mat3 mat3x2 mat3x3 mat3x4 mat4 mat4x2 mat4x3 mat4x4 sampler1D sampler1DArray ' +
        'sampler1DArrayShadow sampler1DShadow sampler2D sampler2DArray sampler2DArrayShadow ' +
        'sampler2DMS sampler2DMSArray sampler2DRect sampler2DRectShadow sampler2DShadow sampler3D ' +
        'samplerBuffer samplerCube samplerCubeArray samplerCubeArrayShadow samplerCubeShadow ' +
        'image1D uimage1DArray uimage2D uimage2DArray uimage2DMS uimage2DMSArray uimage2DRect ' +
        'uimage3D uimageBuffer uimageCube uimageCubeArray uint usampler1D usampler1DArray ' +
        'usampler2D usampler2DArray usampler2DMS usampler2DMSArray usampler2DRect usampler3D ' +
        'samplerBuffer usamplerCube usamplerCubeArray uvec2 uvec3 uvec4 vec2 vec3 vec4 void',
      built_in:
        // Constants
        'gl_MaxAtomicCounterBindings gl_MaxAtomicCounterBufferSize gl_MaxClipDistances gl_MaxClipPlanes ' +
        'gl_MaxCombinedAtomicCounterBuffers gl_MaxCombinedAtomicCounters gl_MaxCombinedImageUniforms ' +
        'gl_MaxCombinedImageUnitsAndFragmentOutputs gl_MaxCombinedTextureImageUnits gl_MaxComputeAtomicCounterBuffers ' +
        'gl_MaxComputeAtomicCounters gl_MaxComputeImageUniforms gl_MaxComputeTextureImageUnits ' +
        'gl_MaxComputeUniformComponents gl_MaxComputeWorkGroupCount gl_MaxComputeWorkGroupSize ' +
        'gl_MaxDrawBuffers gl_MaxFragmentAtomicCounterBuffers gl_MaxFragmentAtomicCounters ' +
        'gl_MaxFragmentImageUniforms gl_MaxFragmentInputComponents gl_MaxFragmentInputVectors ' +
        'gl_MaxFragmentUniformComponents gl_MaxFragmentUniformVectors gl_MaxGeometryAtomicCounterBuffers ' +
        'gl_MaxGeometryAtomicCounters gl_MaxGeometryImageUniforms gl_MaxGeometryInputComponents ' +
        'gl_MaxGeometryOutputComponents gl_MaxGeometryOutputVertices gl_MaxGeometryTextureImageUnits ' +
        'gl_MaxGeometryTotalOutputComponents gl_MaxGeometryUniformComponents gl_MaxGeometryVaryingComponents ' +
        'gl_MaxImageSamples gl_MaxImageUnits gl_MaxLights gl_MaxPatchVertices gl_MaxProgramTexelOffset ' +
        'gl_MaxTessControlAtomicCounterBuffers gl_MaxTessControlAtomicCounters gl_MaxTessControlImageUniforms ' +
        'gl_MaxTessControlInputComponents gl_MaxTessControlOutputComponents gl_MaxTessControlTextureImageUnits ' +
        'gl_MaxTessControlTotalOutputComponents gl_MaxTessControlUniformComponents ' +
        'gl_MaxTessEvaluationAtomicCounterBuffers gl_MaxTessEvaluationAtomicCounters ' +
        'gl_MaxTessEvaluationImageUniforms gl_MaxTessEvaluationInputComponents gl_MaxTessEvaluationOutputComponents ' +
        'gl_MaxTessEvaluationTextureImageUnits gl_MaxTessEvaluationUniformComponents ' +
        'gl_MaxTessGenLevel gl_MaxTessPatchComponents gl_MaxTextureCoords gl_MaxTextureImageUnits ' +
        'gl_MaxTextureUnits gl_MaxVaryingComponents gl_MaxVaryingFloats gl_MaxVaryingVectors ' +
        'gl_MaxVertexAtomicCounterBuffers gl_MaxVertexAtomicCounters gl_MaxVertexAttribs gl_MaxVertexImageUniforms ' +
        'gl_MaxVertexOutputComponents gl_MaxVertexOutputVectors gl_MaxVertexTextureImageUnits ' +
        'gl_MaxVertexUniformComponents gl_MaxVertexUniformVectors gl_MaxViewports gl_MinProgramTexelOffset ' +
        // Variables
        'gl_BackColor gl_BackLightModelProduct gl_BackLightProduct gl_BackMaterial ' +
        'gl_BackSecondaryColor gl_ClipDistance gl_ClipPlane gl_ClipVertex gl_Color ' +
        'gl_DepthRange gl_EyePlaneQ gl_EyePlaneR gl_EyePlaneS gl_EyePlaneT gl_Fog gl_FogCoord ' +
        'gl_FogFragCoord gl_FragColor gl_FragCoord gl_FragData gl_FragDepth gl_FrontColor ' +
        'gl_FrontFacing gl_FrontLightModelProduct gl_FrontLightProduct gl_FrontMaterial ' +
        'gl_FrontSecondaryColor gl_GlobalInvocationID gl_InstanceID gl_InvocationID gl_Layer gl_LightModel ' +
        'gl_LightSource gl_LocalInvocationID gl_LocalInvocationIndex gl_ModelViewMatrix ' +
        'gl_ModelViewMatrixInverse gl_ModelViewMatrixInverseTranspose gl_ModelViewMatrixTranspose ' +
        'gl_ModelViewProjectionMatrix gl_ModelViewProjectionMatrixInverse gl_ModelViewProjectionMatrixInverseTranspose ' +
        'gl_ModelViewProjectionMatrixTranspose gl_MultiTexCoord0 gl_MultiTexCoord1 gl_MultiTexCoord2 ' +
        'gl_MultiTexCoord3 gl_MultiTexCoord4 gl_MultiTexCoord5 gl_MultiTexCoord6 gl_MultiTexCoord7 ' +
        'gl_Normal gl_NormalMatrix gl_NormalScale gl_NumSamples gl_NumWorkGroups gl_ObjectPlaneQ ' +
        'gl_ObjectPlaneR gl_ObjectPlaneS gl_ObjectPlaneT gl_PatchVerticesIn gl_Point gl_PointCoord ' +
        'gl_PointSize gl_Position gl_PrimitiveID gl_PrimitiveIDIn gl_ProjectionMatrix gl_ProjectionMatrixInverse ' +
        'gl_ProjectionMatrixInverseTranspose gl_ProjectionMatrixTranspose gl_SampleID gl_SampleMask ' +
        'gl_SampleMaskIn gl_SamplePosition gl_SecondaryColor gl_TessCoord gl_TessLevelInner gl_TessLevelOuter ' +
        'gl_TexCoord gl_TextureEnvColor gl_TextureMatrix gl_TextureMatrixInverse gl_TextureMatrixInverseTranspose ' +
        'gl_TextureMatrixTranspose gl_Vertex gl_VertexID gl_ViewportIndex gl_WorkGroupID gl_WorkGroupSize gl_in gl_out ' +
        // Functions
        'EmitStreamVertex EmitVertex EndPrimitive EndStreamPrimitive abs acos acosh all any asin ' +
        'asinh atan atanh atomicAdd atomicAnd atomicCompSwap atomicCounter atomicCounterDecrement ' +
        'atomicCounterIncrement atomicExchange atomicMax atomicMin atomicOr atomicXor barrier ' +
        'bitCount bitfieldExtract bitfieldInsert bitfieldReverse ceil clamp cos cosh cross ' +
        'dFdx dFdy degrees determinant distance dot equal exp exp2 faceforward findLSB findMSB ' +
        'floatBitsToInt floatBitsToUint floor fma fract frexp ftransform fwidth greaterThan ' +
        'greaterThanEqual groupMemoryBarrier imageAtomicAdd imageAtomicAnd imageAtomicCompSwap ' +
        'imageAtomicExchange imageAtomicMax imageAtomicMin imageAtomicOr imageAtomicXor imageLoad ' +
        'imageSize imageStore imulExtended intBitsToFloat interpolateAtCentroid interpolateAtOffset ' +
        'interpolateAtSample inverse inversesqrt isinf isnan ldexp length lessThan lessThanEqual log ' +
        'log2 matrixCompMult max memoryBarrier memoryBarrierAtomicCounter memoryBarrierBuffer ' +
        'memoryBarrierImage memoryBarrierShared min mix mod modf noise1 noise2 noise3 noise4 ' +
        'normalize not notEqual outerProduct packDouble2x32 packHalf2x16 packSnorm2x16 packSnorm4x8 ' +
        'packUnorm2x16 packUnorm4x8 pow radians reflect refract round roundEven shadow1D shadow1DLod ' +
        'shadow1DProj shadow1DProjLod shadow2D shadow2DLod shadow2DProj shadow2DProjLod sign sin sinh ' +
        'smoothstep sqrt step tan tanh texelFetch texelFetchOffset texture texture1D texture1DLod ' +
        'texture1DProj texture1DProjLod texture2D texture2DLod texture2DProj texture2DProjLod ' +
        'texture3D texture3DLod texture3DProj texture3DProjLod textureCube textureCubeLod ' +
        'textureGather textureGatherOffset textureGatherOffsets textureGrad textureGradOffset ' +
        'textureLod textureLodOffset textureOffset textureProj textureProjGrad textureProjGradOffset ' +
        'textureProjLod textureProjLodOffset textureProjOffset textureQueryLevels textureQueryLod ' +
        'textureSize transpose trunc uaddCarry uintBitsToFloat umulExtended unpackDouble2x32 ' +
        'unpackHalf2x16 unpackSnorm2x16 unpackSnorm4x8 unpackUnorm2x16 unpackUnorm4x8 usubBorrow',
      literal: 'true false'
    },
    illegal: '"',
    contains: [
      hljs.C_LINE_COMMENT_MODE,
      hljs.C_BLOCK_COMMENT_MODE,
      hljs.C_NUMBER_MODE,
      {
        className: 'meta',
        begin: '#', end: '$'
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  };
}
