bindings.cc

/*
 * bindings.cc
 *
 *  Created on: Dec 13, 2011
 *      Author: ngk437
 */

#include <cstdlib>
#include "webgl.h"

Nan::Persistent<v8::FunctionTemplate> WEBGL_TEMPLATE;

#define JS_GL_METHOD(webgl_name, method_name) \
  Nan::SetPrototypeTemplate(\
      webgl_template \
    , webgl_name\
    , Nan::New<v8::FunctionTemplate>(\
        WebGLRenderingContext:: method_name))

#define JS_CONSTANT(x, v) \
  Nan::SetPrototypeTemplate( \
      webgl_template \
    , #x \
    , Nan::New<v8::Integer>(v))

#define JS_GL_CONSTANT(name) JS_CONSTANT(name, GL_ ## name)

NAN_MODULE_INIT(Init) {
  v8::Local<v8::FunctionTemplate> webgl_template =
    Nan::New<v8::FunctionTemplate>(WebGLRenderingContext::New);

  webgl_template->InstanceTemplate()->SetInternalFieldCount(1);
  webgl_template->SetClassName(
    Nan::New<v8::String>("WebGLRenderingContext").ToLocalChecked());

  /* WebGL methods */
  JS_GL_METHOD("_drawArraysInstanced", DrawArraysInstanced);
  JS_GL_METHOD("_drawElementsInstanced", DrawElementsInstanced);
  JS_GL_METHOD("_vertexAttribDivisor", VertexAttribDivisor);

  JS_GL_METHOD("getUniform", GetUniform);
  JS_GL_METHOD("uniform1f", Uniform1f);
  JS_GL_METHOD("uniform2f", Uniform2f);
  JS_GL_METHOD("uniform3f", Uniform3f);
  JS_GL_METHOD("uniform4f", Uniform4f);
  JS_GL_METHOD("uniform1i", Uniform1i);
  JS_GL_METHOD("uniform2i", Uniform2i);
  JS_GL_METHOD("uniform3i", Uniform3i);
  JS_GL_METHOD("uniform4i", Uniform4i);
  JS_GL_METHOD("pixelStorei", PixelStorei);
  JS_GL_METHOD("bindAttribLocation", BindAttribLocation);
  JS_GL_METHOD("getError", GetError);
  JS_GL_METHOD("drawArrays", DrawArrays);
  JS_GL_METHOD("uniformMatrix2fv", UniformMatrix2fv);
  JS_GL_METHOD("uniformMatrix3fv", UniformMatrix3fv);
  JS_GL_METHOD("uniformMatrix4fv", UniformMatrix4fv);
  JS_GL_METHOD("generateMipmap", GenerateMipmap);
  JS_GL_METHOD("getAttribLocation", GetAttribLocation);
  JS_GL_METHOD("depthFunc", DepthFunc);
  JS_GL_METHOD("viewport", Viewport);
  JS_GL_METHOD("createShader", CreateShader);
  JS_GL_METHOD("shaderSource", ShaderSource);
  JS_GL_METHOD("compileShader", CompileShader);
  JS_GL_METHOD("getShaderParameter", GetShaderParameter);
  JS_GL_METHOD("getShaderInfoLog", GetShaderInfoLog);
  JS_GL_METHOD("createProgram", CreateProgram);
  JS_GL_METHOD("attachShader", AttachShader);
  JS_GL_METHOD("linkProgram", LinkProgram);
  JS_GL_METHOD("getProgramParameter", GetProgramParameter);
  JS_GL_METHOD("getUniformLocation", GetUniformLocation);
  JS_GL_METHOD("clearColor", ClearColor);
  JS_GL_METHOD("clearDepth", ClearDepth);
  JS_GL_METHOD("disable", Disable);
  JS_GL_METHOD("createTexture", CreateTexture);
  JS_GL_METHOD("bindTexture", BindTexture);
  JS_GL_METHOD("texImage2D", TexImage2D);
  JS_GL_METHOD("texParameteri", TexParameteri);
  JS_GL_METHOD("texParameterf", TexParameterf);
  JS_GL_METHOD("clear", Clear);
  JS_GL_METHOD("useProgram", UseProgram);
  JS_GL_METHOD("createFramebuffer", CreateFramebuffer);
  JS_GL_METHOD("bindFramebuffer", BindFramebuffer);
  JS_GL_METHOD("framebufferTexture2D", FramebufferTexture2D);
  JS_GL_METHOD("createBuffer", CreateBuffer);
  JS_GL_METHOD("bindBuffer", BindBuffer);
  JS_GL_METHOD("bufferData", BufferData);
  JS_GL_METHOD("bufferSubData", BufferSubData);
  JS_GL_METHOD("enable", Enable);
  JS_GL_METHOD("blendEquation", BlendEquation);
  JS_GL_METHOD("blendFunc", BlendFunc);
  JS_GL_METHOD("enableVertexAttribArray", EnableVertexAttribArray);
  JS_GL_METHOD("vertexAttribPointer", VertexAttribPointer);
  JS_GL_METHOD("activeTexture", ActiveTexture);
  JS_GL_METHOD("drawElements", DrawElements);
  JS_GL_METHOD("flush", Flush);
  JS_GL_METHOD("finish", Finish);
  JS_GL_METHOD("vertexAttrib1f", VertexAttrib1f);
  JS_GL_METHOD("vertexAttrib2f", VertexAttrib2f);
  JS_GL_METHOD("vertexAttrib3f", VertexAttrib3f);
  JS_GL_METHOD("vertexAttrib4f", VertexAttrib4f);
  JS_GL_METHOD("blendColor", BlendColor);
  JS_GL_METHOD("blendEquationSeparate", BlendEquationSeparate);
  JS_GL_METHOD("blendFuncSeparate", BlendFuncSeparate);
  JS_GL_METHOD("clearStencil", ClearStencil);
  JS_GL_METHOD("colorMask", ColorMask);
  JS_GL_METHOD("copyTexImage2D", CopyTexImage2D);
  JS_GL_METHOD("copyTexSubImage2D", CopyTexSubImage2D);
  JS_GL_METHOD("cullFace", CullFace);
  JS_GL_METHOD("depthMask", DepthMask);
  JS_GL_METHOD("depthRange", DepthRange);
  JS_GL_METHOD("disableVertexAttribArray", DisableVertexAttribArray);
  JS_GL_METHOD("hint", Hint);
  JS_GL_METHOD("isEnabled", IsEnabled);
  JS_GL_METHOD("lineWidth", LineWidth);
  JS_GL_METHOD("polygonOffset", PolygonOffset);
  JS_GL_METHOD("scissor", Scissor);
  JS_GL_METHOD("stencilFunc", StencilFunc);
  JS_GL_METHOD("stencilFuncSeparate", StencilFuncSeparate);
  JS_GL_METHOD("stencilMask", StencilMask);
  JS_GL_METHOD("stencilMaskSeparate", StencilMaskSeparate);
  JS_GL_METHOD("stencilOp", StencilOp);
  JS_GL_METHOD("stencilOpSeparate", StencilOpSeparate);
  JS_GL_METHOD("bindRenderbuffer", BindRenderbuffer);
  JS_GL_METHOD("createRenderbuffer", CreateRenderbuffer);
  JS_GL_METHOD("deleteBuffer", DeleteBuffer);
  JS_GL_METHOD("deleteFramebuffer", DeleteFramebuffer);
  JS_GL_METHOD("deleteProgram", DeleteProgram);
  JS_GL_METHOD("deleteRenderbuffer", DeleteRenderbuffer);
  JS_GL_METHOD("deleteShader", DeleteShader);
  JS_GL_METHOD("deleteTexture", DeleteTexture);
  JS_GL_METHOD("detachShader", DetachShader);
  JS_GL_METHOD("framebufferRenderbuffer", FramebufferRenderbuffer);
  JS_GL_METHOD("getVertexAttribOffset", GetVertexAttribOffset);
  JS_GL_METHOD("isBuffer", IsBuffer);
  JS_GL_METHOD("isFramebuffer", IsFramebuffer);
  JS_GL_METHOD("isProgram", IsProgram);
  JS_GL_METHOD("isRenderbuffer", IsRenderbuffer);
  JS_GL_METHOD("isShader", IsShader);
  JS_GL_METHOD("isTexture", IsTexture);
  JS_GL_METHOD("renderbufferStorage", RenderbufferStorage);
  JS_GL_METHOD("getShaderSource", GetShaderSource);
  JS_GL_METHOD("validateProgram", ValidateProgram);
  JS_GL_METHOD("texSubImage2D", TexSubImage2D);
  JS_GL_METHOD("readPixels", ReadPixels);
  JS_GL_METHOD("getTexParameter", GetTexParameter);
  JS_GL_METHOD("getActiveAttrib", GetActiveAttrib);
  JS_GL_METHOD("getActiveUniform", GetActiveUniform);
  JS_GL_METHOD("getAttachedShaders", GetAttachedShaders);
  JS_GL_METHOD("getParameter", GetParameter);
  JS_GL_METHOD("getBufferParameter", GetBufferParameter);
  JS_GL_METHOD("getFramebufferAttachmentParameter", GetFramebufferAttachmentParameter);
  JS_GL_METHOD("getProgramInfoLog", GetProgramInfoLog);
  JS_GL_METHOD("getRenderbufferParameter", GetRenderbufferParameter);
  JS_GL_METHOD("getVertexAttrib", GetVertexAttrib);
  JS_GL_METHOD("getSupportedExtensions", GetSupportedExtensions);
  JS_GL_METHOD("getExtension", GetExtension);
  JS_GL_METHOD("checkFramebufferStatus", CheckFramebufferStatus);
  JS_GL_METHOD("getShaderPrecisionFormat", GetShaderPrecisionFormat);
  JS_GL_METHOD("frontFace", FrontFace);
  JS_GL_METHOD("sampleCoverage", SampleCoverage);
  JS_GL_METHOD("destroy", Destroy);
  JS_GL_METHOD("drawBuffersWEBGL", DrawBuffersWEBGL);
  JS_GL_METHOD("extWEBGL_draw_buffers", EXTWEBGL_draw_buffers);

  // Windows defines a macro called NO_ERROR which messes this up
  Nan::SetPrototypeTemplate(
    webgl_template,
    "NO_ERROR",
    Nan::New<v8::Integer>(GL_NO_ERROR));
  JS_GL_CONSTANT(INVALID_ENUM);
  JS_GL_CONSTANT(INVALID_VALUE);
  JS_GL_CONSTANT(INVALID_OPERATION);
  JS_GL_CONSTANT(OUT_OF_MEMORY);

  // OpenGL ES 2.1 constants
  Nan::SetPrototypeTemplate(
      webgl_template
    , "DEPTH_STENCIL"
    , Nan::New<v8::Integer>(GL_DEPTH_STENCIL_OES));

  Nan::SetPrototypeTemplate(
      webgl_template
    , "DEPTH_STENCIL_ATTACHMENT"
    , Nan::New<v8::Integer>(0x821A));

  JS_GL_CONSTANT(MAX_VERTEX_UNIFORM_VECTORS);
  JS_GL_CONSTANT(MAX_VARYING_VECTORS);
  JS_GL_CONSTANT(MAX_FRAGMENT_UNIFORM_VECTORS);
  JS_GL_CONSTANT(RGB565);
  JS_GL_CONSTANT(STENCIL_INDEX8);
  JS_GL_CONSTANT(FRAMEBUFFER_INCOMPLETE_DIMENSIONS);
  JS_GL_CONSTANT(DEPTH_BUFFER_BIT);
  JS_GL_CONSTANT(STENCIL_BUFFER_BIT);
  JS_GL_CONSTANT(COLOR_BUFFER_BIT);
  JS_GL_CONSTANT(POINTS);
  JS_GL_CONSTANT(LINES);
  JS_GL_CONSTANT(LINE_LOOP);
  JS_GL_CONSTANT(LINE_STRIP);
  JS_GL_CONSTANT(TRIANGLES);
  JS_GL_CONSTANT(TRIANGLE_STRIP);
  JS_GL_CONSTANT(TRIANGLE_FAN);
  JS_GL_CONSTANT(ZERO);
  JS_GL_CONSTANT(ONE);
  JS_GL_CONSTANT(SRC_COLOR);
  JS_GL_CONSTANT(ONE_MINUS_SRC_COLOR);
  JS_GL_CONSTANT(SRC_ALPHA);
  JS_GL_CONSTANT(ONE_MINUS_SRC_ALPHA);
  JS_GL_CONSTANT(DST_ALPHA);
  JS_GL_CONSTANT(ONE_MINUS_DST_ALPHA);
  JS_GL_CONSTANT(DST_COLOR);
  JS_GL_CONSTANT(ONE_MINUS_DST_COLOR);
  JS_GL_CONSTANT(SRC_ALPHA_SATURATE);
  JS_GL_CONSTANT(FUNC_ADD);
  JS_GL_CONSTANT(BLEND_EQUATION);
  JS_GL_CONSTANT(BLEND_EQUATION_RGB);
  JS_GL_CONSTANT(BLEND_EQUATION_ALPHA);
  JS_GL_CONSTANT(FUNC_SUBTRACT);
  JS_GL_CONSTANT(FUNC_REVERSE_SUBTRACT);
  JS_GL_CONSTANT(BLEND_DST_RGB);
  JS_GL_CONSTANT(BLEND_SRC_RGB);
  JS_GL_CONSTANT(BLEND_DST_ALPHA);
  JS_GL_CONSTANT(BLEND_SRC_ALPHA);
  JS_GL_CONSTANT(CONSTANT_COLOR);
  JS_GL_CONSTANT(ONE_MINUS_CONSTANT_COLOR);
  JS_GL_CONSTANT(CONSTANT_ALPHA);
  JS_GL_CONSTANT(ONE_MINUS_CONSTANT_ALPHA);
  JS_GL_CONSTANT(BLEND_COLOR);
  JS_GL_CONSTANT(ARRAY_BUFFER);
  JS_GL_CONSTANT(ELEMENT_ARRAY_BUFFER);
  JS_GL_CONSTANT(ARRAY_BUFFER_BINDING);
  JS_GL_CONSTANT(ELEMENT_ARRAY_BUFFER_BINDING);
  JS_GL_CONSTANT(STREAM_DRAW);
  JS_GL_CONSTANT(STATIC_DRAW);
  JS_GL_CONSTANT(DYNAMIC_DRAW);
  JS_GL_CONSTANT(BUFFER_SIZE);
  JS_GL_CONSTANT(BUFFER_USAGE);
  JS_GL_CONSTANT(CURRENT_VERTEX_ATTRIB);
  JS_GL_CONSTANT(FRONT);
  JS_GL_CONSTANT(BACK);
  JS_GL_CONSTANT(FRONT_AND_BACK);
  JS_GL_CONSTANT(TEXTURE_2D);
  JS_GL_CONSTANT(CULL_FACE);
  JS_GL_CONSTANT(BLEND);
  JS_GL_CONSTANT(DITHER);
  JS_GL_CONSTANT(STENCIL_TEST);
  JS_GL_CONSTANT(DEPTH_TEST);
  JS_GL_CONSTANT(SCISSOR_TEST);
  JS_GL_CONSTANT(POLYGON_OFFSET_FILL);
  JS_GL_CONSTANT(SAMPLE_ALPHA_TO_COVERAGE);
  JS_GL_CONSTANT(SAMPLE_COVERAGE);
  JS_GL_CONSTANT(CW);
  JS_GL_CONSTANT(CCW);
  JS_GL_CONSTANT(LINE_WIDTH);
  JS_GL_CONSTANT(ALIASED_POINT_SIZE_RANGE);
  JS_GL_CONSTANT(ALIASED_LINE_WIDTH_RANGE);
  JS_GL_CONSTANT(CULL_FACE_MODE);
  JS_GL_CONSTANT(FRONT_FACE);
  JS_GL_CONSTANT(DEPTH_RANGE);
  JS_GL_CONSTANT(DEPTH_WRITEMASK);
  JS_GL_CONSTANT(DEPTH_CLEAR_VALUE);
  JS_GL_CONSTANT(DEPTH_FUNC);
  JS_GL_CONSTANT(STENCIL_CLEAR_VALUE);
  JS_GL_CONSTANT(STENCIL_FUNC);
  JS_GL_CONSTANT(STENCIL_FAIL);
  JS_GL_CONSTANT(STENCIL_PASS_DEPTH_FAIL);
  JS_GL_CONSTANT(STENCIL_PASS_DEPTH_PASS);
  JS_GL_CONSTANT(STENCIL_REF);
  JS_GL_CONSTANT(STENCIL_VALUE_MASK);
  JS_GL_CONSTANT(STENCIL_WRITEMASK);
  JS_GL_CONSTANT(STENCIL_BACK_FUNC);
  JS_GL_CONSTANT(STENCIL_BACK_FAIL);
  JS_GL_CONSTANT(STENCIL_BACK_PASS_DEPTH_FAIL);
  JS_GL_CONSTANT(STENCIL_BACK_PASS_DEPTH_PASS);
  JS_GL_CONSTANT(STENCIL_BACK_REF);
  JS_GL_CONSTANT(STENCIL_BACK_VALUE_MASK);
  JS_GL_CONSTANT(STENCIL_BACK_WRITEMASK);
  JS_GL_CONSTANT(VIEWPORT);
  JS_GL_CONSTANT(SCISSOR_BOX);
  JS_GL_CONSTANT(COLOR_CLEAR_VALUE);
  JS_GL_CONSTANT(COLOR_WRITEMASK);
  JS_GL_CONSTANT(UNPACK_ALIGNMENT);
  JS_GL_CONSTANT(PACK_ALIGNMENT);
  JS_GL_CONSTANT(MAX_TEXTURE_SIZE);
  JS_GL_CONSTANT(MAX_VIEWPORT_DIMS);
  JS_GL_CONSTANT(SUBPIXEL_BITS);
  JS_GL_CONSTANT(RED_BITS);
  JS_GL_CONSTANT(GREEN_BITS);
  JS_GL_CONSTANT(BLUE_BITS);
  JS_GL_CONSTANT(ALPHA_BITS);
  JS_GL_CONSTANT(DEPTH_BITS);
  JS_GL_CONSTANT(STENCIL_BITS);
  JS_GL_CONSTANT(POLYGON_OFFSET_UNITS);
  JS_GL_CONSTANT(POLYGON_OFFSET_FACTOR);
  JS_GL_CONSTANT(TEXTURE_BINDING_2D);
  JS_GL_CONSTANT(SAMPLE_BUFFERS);
  JS_GL_CONSTANT(SAMPLES);
  JS_GL_CONSTANT(SAMPLE_COVERAGE_VALUE);
  JS_GL_CONSTANT(SAMPLE_COVERAGE_INVERT);
  JS_GL_CONSTANT(COMPRESSED_TEXTURE_FORMATS);
  JS_GL_CONSTANT(DONT_CARE);
  JS_GL_CONSTANT(FASTEST);
  JS_GL_CONSTANT(NICEST);
  JS_GL_CONSTANT(GENERATE_MIPMAP_HINT);
  JS_GL_CONSTANT(BYTE);
  JS_GL_CONSTANT(UNSIGNED_BYTE);
  JS_GL_CONSTANT(SHORT);
  JS_GL_CONSTANT(UNSIGNED_SHORT);
  JS_GL_CONSTANT(INT);
  JS_GL_CONSTANT(UNSIGNED_INT);
  JS_GL_CONSTANT(FLOAT);
  JS_GL_CONSTANT(DEPTH_COMPONENT);
  JS_GL_CONSTANT(ALPHA);
  JS_GL_CONSTANT(RGB);
  JS_GL_CONSTANT(RGBA);
  JS_GL_CONSTANT(LUMINANCE);
  JS_GL_CONSTANT(LUMINANCE_ALPHA);
  JS_GL_CONSTANT(UNSIGNED_SHORT_4_4_4_4);
  JS_GL_CONSTANT(UNSIGNED_SHORT_5_5_5_1);
  JS_GL_CONSTANT(UNSIGNED_SHORT_5_6_5);
  JS_GL_CONSTANT(FRAGMENT_SHADER);
  JS_GL_CONSTANT(VERTEX_SHADER);
  JS_GL_CONSTANT(MAX_VERTEX_ATTRIBS);
  JS_GL_CONSTANT(MAX_COMBINED_TEXTURE_IMAGE_UNITS);
  JS_GL_CONSTANT(MAX_VERTEX_TEXTURE_IMAGE_UNITS);
  JS_GL_CONSTANT(MAX_TEXTURE_IMAGE_UNITS);
  JS_GL_CONSTANT(SHADER_TYPE);
  JS_GL_CONSTANT(DELETE_STATUS);
  JS_GL_CONSTANT(LINK_STATUS);
  JS_GL_CONSTANT(VALIDATE_STATUS);
  JS_GL_CONSTANT(ATTACHED_SHADERS);
  JS_GL_CONSTANT(ACTIVE_UNIFORMS);
  JS_GL_CONSTANT(ACTIVE_ATTRIBUTES);
  JS_GL_CONSTANT(SHADING_LANGUAGE_VERSION);
  JS_GL_CONSTANT(CURRENT_PROGRAM);
  JS_GL_CONSTANT(NEVER);
  JS_GL_CONSTANT(LESS);
  JS_GL_CONSTANT(EQUAL);
  JS_GL_CONSTANT(LEQUAL);
  JS_GL_CONSTANT(GREATER);
  JS_GL_CONSTANT(NOTEQUAL);
  JS_GL_CONSTANT(GEQUAL);
  JS_GL_CONSTANT(ALWAYS);
  JS_GL_CONSTANT(KEEP);
  JS_GL_CONSTANT(REPLACE);
  JS_GL_CONSTANT(INCR);
  JS_GL_CONSTANT(DECR);
  JS_GL_CONSTANT(INVERT);
  JS_GL_CONSTANT(INCR_WRAP);
  JS_GL_CONSTANT(DECR_WRAP);
  JS_GL_CONSTANT(VENDOR);
  JS_GL_CONSTANT(RENDERER);
  JS_GL_CONSTANT(NEAREST);
  JS_GL_CONSTANT(LINEAR);
  JS_GL_CONSTANT(NEAREST_MIPMAP_NEAREST);
  JS_GL_CONSTANT(LINEAR_MIPMAP_NEAREST);
  JS_GL_CONSTANT(NEAREST_MIPMAP_LINEAR);
  JS_GL_CONSTANT(LINEAR_MIPMAP_LINEAR);
  JS_GL_CONSTANT(TEXTURE_MAG_FILTER);
  JS_GL_CONSTANT(TEXTURE_MIN_FILTER);
  JS_GL_CONSTANT(TEXTURE_WRAP_S);
  JS_GL_CONSTANT(TEXTURE_WRAP_T);
  JS_GL_CONSTANT(TEXTURE);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP);
  JS_GL_CONSTANT(TEXTURE_BINDING_CUBE_MAP);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_POSITIVE_X);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_NEGATIVE_X);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_POSITIVE_Y);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_NEGATIVE_Y);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_POSITIVE_Z);
  JS_GL_CONSTANT(TEXTURE_CUBE_MAP_NEGATIVE_Z);
  JS_GL_CONSTANT(MAX_CUBE_MAP_TEXTURE_SIZE);
  JS_GL_CONSTANT(TEXTURE0);
  JS_GL_CONSTANT(TEXTURE1);
  JS_GL_CONSTANT(TEXTURE2);
  JS_GL_CONSTANT(TEXTURE3);
  JS_GL_CONSTANT(TEXTURE4);
  JS_GL_CONSTANT(TEXTURE5);
  JS_GL_CONSTANT(TEXTURE6);
  JS_GL_CONSTANT(TEXTURE7);
  JS_GL_CONSTANT(TEXTURE8);
  JS_GL_CONSTANT(TEXTURE9);
  JS_GL_CONSTANT(TEXTURE10);
  JS_GL_CONSTANT(TEXTURE11);
  JS_GL_CONSTANT(TEXTURE12);
  JS_GL_CONSTANT(TEXTURE13);
  JS_GL_CONSTANT(TEXTURE14);
  JS_GL_CONSTANT(TEXTURE15);
  JS_GL_CONSTANT(TEXTURE16);
  JS_GL_CONSTANT(TEXTURE17);
  JS_GL_CONSTANT(TEXTURE18);
  JS_GL_CONSTANT(TEXTURE19);
  JS_GL_CONSTANT(TEXTURE20);
  JS_GL_CONSTANT(TEXTURE21);
  JS_GL_CONSTANT(TEXTURE22);
  JS_GL_CONSTANT(TEXTURE23);
  JS_GL_CONSTANT(TEXTURE24);
  JS_GL_CONSTANT(TEXTURE25);
  JS_GL_CONSTANT(TEXTURE26);
  JS_GL_CONSTANT(TEXTURE27);
  JS_GL_CONSTANT(TEXTURE28);
  JS_GL_CONSTANT(TEXTURE29);
  JS_GL_CONSTANT(TEXTURE30);
  JS_GL_CONSTANT(TEXTURE31);
  JS_GL_CONSTANT(ACTIVE_TEXTURE);
  JS_GL_CONSTANT(REPEAT);
  JS_GL_CONSTANT(CLAMP_TO_EDGE);
  JS_GL_CONSTANT(MIRRORED_REPEAT);
  JS_GL_CONSTANT(FLOAT_VEC2);
  JS_GL_CONSTANT(FLOAT_VEC3);
  JS_GL_CONSTANT(FLOAT_VEC4);
  JS_GL_CONSTANT(INT_VEC2);
  JS_GL_CONSTANT(INT_VEC3);
  JS_GL_CONSTANT(INT_VEC4);
  JS_GL_CONSTANT(BOOL);
  JS_GL_CONSTANT(BOOL_VEC2);
  JS_GL_CONSTANT(BOOL_VEC3);
  JS_GL_CONSTANT(BOOL_VEC4);
  JS_GL_CONSTANT(FLOAT_MAT2);
  JS_GL_CONSTANT(FLOAT_MAT3);
  JS_GL_CONSTANT(FLOAT_MAT4);
  JS_GL_CONSTANT(SAMPLER_2D);
  JS_GL_CONSTANT(SAMPLER_CUBE);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_ENABLED);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_SIZE);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_STRIDE);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_TYPE);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_NORMALIZED);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_POINTER);
  JS_GL_CONSTANT(VERTEX_ATTRIB_ARRAY_BUFFER_BINDING);
  JS_GL_CONSTANT(COMPILE_STATUS);
  JS_GL_CONSTANT(LOW_FLOAT);
  JS_GL_CONSTANT(MEDIUM_FLOAT);
  JS_GL_CONSTANT(HIGH_FLOAT);
  JS_GL_CONSTANT(LOW_INT);
  JS_GL_CONSTANT(MEDIUM_INT);
  JS_GL_CONSTANT(HIGH_INT);
  JS_GL_CONSTANT(FRAMEBUFFER);
  JS_GL_CONSTANT(RENDERBUFFER);
  JS_GL_CONSTANT(RGBA4);
  JS_GL_CONSTANT(RGB5_A1);
  JS_GL_CONSTANT(DEPTH_COMPONENT16);
  JS_GL_CONSTANT(RENDERBUFFER_WIDTH);
  JS_GL_CONSTANT(RENDERBUFFER_HEIGHT);
  JS_GL_CONSTANT(RENDERBUFFER_INTERNAL_FORMAT);
  JS_GL_CONSTANT(RENDERBUFFER_RED_SIZE);
  JS_GL_CONSTANT(RENDERBUFFER_GREEN_SIZE);
  JS_GL_CONSTANT(RENDERBUFFER_BLUE_SIZE);
  JS_GL_CONSTANT(RENDERBUFFER_ALPHA_SIZE);
  JS_GL_CONSTANT(RENDERBUFFER_DEPTH_SIZE);
  JS_GL_CONSTANT(RENDERBUFFER_STENCIL_SIZE);
  JS_GL_CONSTANT(FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
  JS_GL_CONSTANT(FRAMEBUFFER_ATTACHMENT_OBJECT_NAME);
  JS_GL_CONSTANT(FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL);
  JS_GL_CONSTANT(FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE);
  JS_GL_CONSTANT(COLOR_ATTACHMENT0);
  JS_GL_CONSTANT(DEPTH_ATTACHMENT);
  JS_GL_CONSTANT(STENCIL_ATTACHMENT);
  JS_GL_CONSTANT(NONE);
  JS_GL_CONSTANT(FRAMEBUFFER_COMPLETE);
  JS_GL_CONSTANT(FRAMEBUFFER_INCOMPLETE_ATTACHMENT);
  JS_GL_CONSTANT(FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT);
  JS_GL_CONSTANT(FRAMEBUFFER_UNSUPPORTED);
  JS_GL_CONSTANT(FRAMEBUFFER_BINDING);
  JS_GL_CONSTANT(RENDERBUFFER_BINDING);
  JS_GL_CONSTANT(MAX_RENDERBUFFER_SIZE);
  JS_GL_CONSTANT(INVALID_FRAMEBUFFER_OPERATION);

  /* WebGL-specific enums */
  JS_CONSTANT(STENCIL_INDEX, 0x1901);
  JS_CONSTANT(UNPACK_FLIP_Y_WEBGL, 0x9240);
  JS_CONSTANT(UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0x9241);
  JS_CONSTANT(CONTEXT_LOST_WEBGL, 0x9242);
  JS_CONSTANT(UNPACK_COLORSPACE_CONVERSION_WEBGL, 0x9243);
  JS_CONSTANT(BROWSER_DEFAULT_WEBGL, 0x9244);
  JS_CONSTANT(VERSION, 0x1F02);
  JS_CONSTANT(IMPLEMENTATION_COLOR_READ_TYPE, 0x8B9A);
  JS_CONSTANT(IMPLEMENTATION_COLOR_READ_FORMAT, 0x8B9B);

  //Export template
  WEBGL_TEMPLATE.Reset(webgl_template);
  Nan::Set(
      target
    , Nan::New<v8::String>("WebGLRenderingContext").ToLocalChecked()
    , Nan::GetFunction(webgl_template).ToLocalChecked());

  //Export helper methods for clean up and error handling
  Nan::Export(target, "cleanup", WebGLRenderingContext::DisposeAll);
  Nan::Export(target, "setError", WebGLRenderingContext::SetError);
}

#if NODE_MAJOR_VERSION >= 10
NAN_MODULE_WORKER_ENABLED(webgl, Init)
#else
NODE_MODULE(webgl, Init)
#endif