(* Js_of_ocaml library
 * http://www.ocsigen.org/js_of_ocaml/
 * Copyright (C) 2012 Jérôme Vouillon
 * Laboratoire PPS - CNRS Université Paris Diderot
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, with linking exception;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *)

open Js
open! Import

(** 5.1 Types *)

type sizei = int

type sizeiptr = int

type intptr = int

type uint = int

type clampf = float

type void

type clearBufferMask = int

type beginMode

type blendingFactor

type blendMode

type bufferTarget

type bufferUsage

type cullFaceMode

type depthFunction

type enableCap

type errorCode

type frontFaceDir

type hintTarget

type hintMode

type textureUnit = int

type 'a pixelStoreParam

type stencilOp

type fbTarget

type attachmentPoint

type rbTarget

type texTarget

type 'a parameter

type 'a bufferParameter

type 'a vertexAttribParam

type vertexAttribPointerParam

type 'a attachParam

type framebufferStatus

type 'a renderbufferParam

type format

type pixelFormat

type pixelType

type 'a texParam

type dataType

type shaderType

type 'a programParam

type 'a shaderParam

type textureFilter

type wrapMode

type texFilter

type uniformType

type colorspaceConversion

type shaderPrecisionType

type objectType

(** 5.2 WebGLContextAttributes *)
class type contextAttributes =
  object
    method alpha : bool t prop

    method depth : bool t prop

    method stencil : bool t prop

    method antialias : bool t prop

    method premultipliedAlpha : bool t prop

    method preserveDrawingBuffer : bool t prop

    method preferLowPowerToHighPerformance : bool t prop

    method failIfMajorPerformanceCaveat : bool t prop
  end

let defaultContextAttributes =
  Js.Unsafe.(
    obj
      [| "alpha", inject _true
       ; "depth", inject _true
       ; "stencil", inject _false
       ; "antialias", inject _true
       ; "premultipliedAlpha", inject _false
       ; "preserveDrawingBuffer", inject _false
       ; "preferLowPowerToHighPerformance", inject _false
       ; "failIfMajorPerformanceCaveat", inject _false
      |])

type buffer

type framebuffer

type program

type renderbuffer

type shader

type texture

type 'a uniformLocation

class type activeInfo =
  object
    method size : int readonly_prop

    method _type : uniformType readonly_prop

    method name : js_string t readonly_prop
  end

class type shaderPrecisionFormat =
  object
    method rangeMin : int readonly_prop

    method rangeMax : int readonly_prop

    method precision : int readonly_prop
  end

class type renderingContext =
  object

    (** 5.13.1 Attributes *)

    method canvas : Dom_html.canvasElement t readonly_prop

    method drawingBufferWidth : sizei readonly_prop

    method drawingBufferHeight : sizei readonly_prop

    (** 5.13.2 Getting information about the context *)

    method getContextAttributes : contextAttributes t meth

    (** 5.13.3 Setting and getting state *)

    method activeTexture : textureUnit -> unit meth

    method blendColor : clampf -> clampf -> clampf -> clampf -> unit meth

    method blendEquation : blendMode -> unit meth

    method blendEquationSeparate : blendMode -> blendMode -> unit meth

    method blendFunc : blendingFactor -> blendingFactor -> unit meth

    method blendFuncSeparate :
      blendingFactor -> blendingFactor -> blendingFactor -> blendingFactor -> unit meth

    method clearColor : clampf -> clampf -> clampf -> clampf -> unit meth

    method clearDepth : clampf -> unit meth

    method clearStencil : int -> unit meth

    method colorMask : bool t -> bool t -> bool t -> bool t -> unit meth

    method cullFace : cullFaceMode -> unit meth

    method depthFunc : depthFunction -> unit meth

    method depthMask : bool t -> unit meth

    method depthRange : clampf -> clampf -> unit meth

    method disable : enableCap -> unit meth

    method enable : enableCap -> unit meth

    method frontFace : frontFaceDir -> unit meth

    method getParameter : 'a. 'a parameter -> 'a meth

    method getError : errorCode meth

    method hint : hintTarget -> hintMode -> unit meth

    method isEnabled : enableCap -> bool t meth

    method lineWidth : float -> unit meth

    method pixelStorei : 'a. 'a pixelStoreParam -> 'a -> unit meth

    method polygonOffset : float -> float -> unit meth

    method sampleCoverage : clampf -> bool t -> unit meth

    method stencilFunc : depthFunction -> int -> uint -> unit meth

    method stencilFuncSeparate : cullFaceMode -> depthFunction -> int -> uint -> unit meth

    method stencilMask : uint -> unit meth

    method stencilMaskSeparate : cullFaceMode -> uint -> unit meth

    method stencilOp : stencilOp -> stencilOp -> stencilOp -> unit meth

    method stencilOpSeparate :
      cullFaceMode -> stencilOp -> stencilOp -> stencilOp -> unit meth

    (** 5.13.4 Viewing and clipping *)

    method scissor : int -> int -> sizei -> sizei -> unit meth

    method viewport : int -> int -> sizei -> sizei -> unit meth

    (** 5.13.5 Buffer objects *)

    method bindBuffer : bufferTarget -> buffer t -> unit meth

    method bindBuffer_ : bufferTarget -> buffer t opt -> unit meth

    method bufferData_create : bufferTarget -> sizeiptr -> bufferUsage -> unit meth

    method bufferData :
      bufferTarget -> #Typed_array.arrayBufferView t -> bufferUsage -> unit meth

    method bufferData_raw :
      bufferTarget -> Typed_array.arrayBuffer t -> bufferUsage -> unit meth

    method bufferSubData :
      bufferTarget -> intptr -> #Typed_array.arrayBufferView t -> unit meth

    method bufferSubData_raw :
      bufferTarget -> intptr -> Typed_array.arrayBuffer t -> unit meth

    method createBuffer : buffer t meth

    method deleteBuffer : buffer t -> unit meth

    method getBufferParameter : 'a. bufferTarget -> 'a bufferParameter -> 'a meth

    method isBuffer : buffer t -> bool t meth

    (** 5.13.6 Framebuffer objects *)

    method bindFramebuffer : fbTarget -> framebuffer t -> unit meth

    method bindFramebuffer_ : fbTarget -> framebuffer t opt -> unit meth

    method checkFramebufferStatus : fbTarget -> framebufferStatus meth

    method createFramebuffer : framebuffer t meth

    method deleteFramebuffer : framebuffer t -> unit meth

    method framebufferRenderbuffer :
      fbTarget -> attachmentPoint -> rbTarget -> renderbuffer t -> unit meth

    method framebufferTexture2D :
      fbTarget -> attachmentPoint -> texTarget -> texture t -> int -> unit meth

    method getFramebufferAttachmentParameter :
      'a. fbTarget -> attachmentPoint -> 'a attachParam -> 'a meth

    method isFramebuffer : framebuffer t -> bool t meth

    (** 5.13.7 Renderbuffer objects *)

    method bindRenderbuffer : rbTarget -> renderbuffer t -> unit meth

    method bindRenderbuffer_ : rbTarget -> renderbuffer t opt -> unit meth

    method createRenderbuffer : renderbuffer t meth

    method deleteRenderbuffer : renderbuffer t -> unit meth

    method getRenderbufferParameter : 'a. rbTarget -> 'a renderbufferParam -> 'a meth

    method isRenderbuffer : renderbuffer t -> bool t meth

    method renderbufferStorage : rbTarget -> format -> sizei -> sizei -> unit meth

    (** 5.13.8 Texture objects *)

    method bindTexture : texTarget -> texture t -> unit meth

    method bindTexture_ : texTarget -> texture t opt -> unit meth

    method compressedTexImage2D :
         texTarget
      -> int
      -> pixelFormat
      -> sizei
      -> sizei
      -> int
      -> #Typed_array.arrayBufferView t
      -> unit meth

    method compressedTexSubImage2D :
         texTarget
      -> int
      -> int
      -> int
      -> sizei
      -> sizei
      -> pixelFormat
      -> #Typed_array.arrayBufferView t
      -> unit meth

    method copyTexImage2D :
      texTarget -> int -> pixelFormat -> int -> int -> sizei -> sizei -> int -> unit meth

    method copyTexSubImage2D :
      texTarget -> int -> int -> int -> int -> int -> sizei -> sizei -> unit meth

    method createTexture : texture t meth

    method deleteTexture : texture t -> unit meth

    method generateMipmap : texTarget -> unit meth

    method getTexParameter : texTarget -> 'a texParam -> 'a meth

    method isTexture : texture t -> bool t meth

    method texImage2D_new :
         texTarget
      -> int
      -> pixelFormat
      -> sizei
      -> sizei
      -> int
      -> pixelFormat
      -> pixelType
      -> void opt
      -> unit meth

    method texImage2D_fromView :
         texTarget
      -> int
      -> pixelFormat
      -> sizei
      -> sizei
      -> int
      -> pixelFormat
      -> pixelType
      -> #Typed_array.arrayBufferView t
      -> unit meth

    method texImage2D_fromImageData :
         texTarget
      -> int
      -> pixelFormat
      -> pixelFormat
      -> pixelType
      -> Dom_html.imageData t
      -> unit meth

    method texImage2D_fromImage :
         texTarget
      -> int
      -> pixelFormat
      -> pixelFormat
      -> pixelType
      -> Dom_html.imageElement t
      -> unit meth

    method texImage2D_fromCanvas :
         texTarget
      -> int
      -> pixelFormat
      -> pixelFormat
      -> pixelType
      -> Dom_html.canvasElement t
      -> unit meth

    method texImage2D_fromVideo :
         texTarget
      -> int
      -> pixelFormat
      -> pixelFormat
      -> pixelType
      -> Dom_html.videoElement t
      -> unit meth

    (* {[
        method texParameterf : texTarget -> texParam -> float -> unit meth
       ]}
    *)
    method texParameteri : texTarget -> 'a texParam -> 'a -> unit meth

    method texSubImage2D_fromView :
         texTarget
      -> int
      -> int
      -> int
      -> sizei
      -> sizei
      -> pixelFormat
      -> pixelType
      -> #Typed_array.arrayBufferView t
      -> unit meth

    method texSubImage2D_fromImageData :
         texTarget
      -> int
      -> int
      -> int
      -> pixelFormat
      -> pixelType
      -> Dom_html.imageData t
      -> unit meth

    method texSubImage2D_fromImage :
         texTarget
      -> int
      -> int
      -> int
      -> pixelFormat
      -> pixelType
      -> Dom_html.imageElement t
      -> unit meth

    method texSubImage2D_fromCanvas :
         texTarget
      -> int
      -> int
      -> int
      -> pixelFormat
      -> pixelType
      -> Dom_html.canvasElement t
      -> unit meth

    method texSubImage2D_fromVideo :
         texTarget
      -> int
      -> int
      -> int
      -> pixelFormat
      -> pixelType
      -> Dom_html.videoElement t
      -> unit meth

    (** 5.13.9 Programs and Shaders *)

    method attachShader : program t -> shader t -> unit meth

    method bindAttribLocation : program t -> uint -> js_string t -> unit meth

    method compileShader : shader t -> unit meth

    method createProgram : program t meth

    method createShader : shaderType -> shader t meth

    method deleteProgram : program t -> unit meth

    method deleteShader : shader t -> unit meth

    method detachShader : program t -> shader t -> unit meth

    method getAttachedShaders : program t -> shader t js_array t meth

    method getProgramParameter : 'a. program t -> 'a programParam -> 'a meth

    method getProgramInfoLog : program t -> js_string t meth

    method getShaderParameter : 'a. shader t -> 'a shaderParam -> 'a meth

    method getShaderPrecisionFormat :
      shaderType -> shaderPrecisionType -> shaderPrecisionFormat t meth

    method getShaderInfoLog : shader t -> js_string t meth

    method getShaderSource : shader t -> js_string t meth

    method isProgram : program t -> bool t meth

    method isShader : shader t -> bool t meth

    method linkProgram : program t -> unit meth

    method shaderSource : shader t -> js_string t -> unit meth

    method useProgram : program t -> unit meth

    method validateProgram : program t -> unit meth

    (** 5.13.10 Uniforms and attributes *)

    method disableVertexAttribArray : uint -> unit meth

    method enableVertexAttribArray : uint -> unit meth

    method getActiveAttrib : program t -> uint -> activeInfo t meth

    method getActiveUniform : program t -> uint -> activeInfo t meth

    method getAttribLocation : program t -> js_string t -> int meth

    method getUniform : 'a 'b. program t -> 'a uniformLocation t -> 'b meth

    method getUniformLocation : 'a. program t -> js_string t -> 'a uniformLocation t meth

    method getVertexAttrib : 'a. uint -> 'a vertexAttribParam -> 'a meth

    method getVertexAttribOffset : uint -> vertexAttribPointerParam -> sizeiptr meth

    method uniform1f : float uniformLocation t -> float -> unit meth

    method uniform1fv_typed :
      float uniformLocation t -> Typed_array.float32Array t -> unit meth

    method uniform1fv : float uniformLocation t -> float js_array t -> unit meth

    method uniform1i : int uniformLocation t -> int -> unit meth

    method uniform1iv_typed :
      int uniformLocation t -> Typed_array.int32Array t -> unit meth

    method uniform1iv : int uniformLocation t -> int js_array t -> unit meth

    method uniform2f : [ `vec2 ] uniformLocation t -> float -> float -> unit meth

    method uniform2fv_typed :
      [ `vec2 ] uniformLocation t -> Typed_array.float32Array t -> unit meth

    method uniform2fv : [ `vec2 ] uniformLocation t -> float js_array t -> unit meth

    method uniform2i : [ `ivec2 ] uniformLocation t -> int -> int -> unit meth

    method uniform2iv : [ `ivec2 ] uniformLocation t -> int js_array t -> unit meth

    method uniform2iv_typed :
      [ `ivec2 ] uniformLocation t -> Typed_array.int32Array t -> unit meth

    method uniform3f : [ `vec3 ] uniformLocation t -> float -> float -> float -> unit meth

    method uniform3fv_typed :
      [ `vec3 ] uniformLocation t -> Typed_array.float32Array t -> unit meth

    method uniform3fv : [ `vec3 ] uniformLocation t -> float js_array t -> unit meth

    method uniform3i : [ `ivec3 ] uniformLocation t -> int -> int -> int -> unit meth

    method uniform3iv : [ `ivec3 ] uniformLocation t -> int js_array t -> unit meth

    method uniform3iv_typed :
      [ `ivec3 ] uniformLocation t -> Typed_array.int32Array t -> unit meth

    method uniform4f :
      [ `vec4 ] uniformLocation t -> float -> float -> float -> float -> unit meth

    method uniform4fv_typed :
      [ `vec4 ] uniformLocation t -> Typed_array.float32Array t -> unit meth

    method uniform4fv : [ `vec4 ] uniformLocation t -> float js_array t -> unit meth

    method uniform4i :
      [ `ivec4 ] uniformLocation t -> int -> int -> int -> int -> unit meth

    method uniform4iv : [ `ivec4 ] uniformLocation t -> int js_array t -> unit meth

    method uniform4iv_typed :
      [ `ivec4 ] uniformLocation t -> Typed_array.int32Array t -> unit meth

    method uniformMatrix2fv :
      [ `mat2 ] uniformLocation t -> bool t -> float js_array t -> unit meth

    method uniformMatrix2fv_typed :
      [ `mat2 ] uniformLocation t -> bool t -> Typed_array.float32Array t -> unit meth

    method uniformMatrix3fv :
      [ `mat3 ] uniformLocation t -> bool t -> float js_array t -> unit meth

    method uniformMatrix3fv_typed :
      [ `mat3 ] uniformLocation t -> bool t -> Typed_array.float32Array t -> unit meth

    method uniformMatrix4fv :
      [ `mat4 ] uniformLocation t -> bool t -> float js_array t -> unit meth

    method uniformMatrix4fv_typed :
      [ `mat4 ] uniformLocation t -> bool t -> Typed_array.float32Array t -> unit meth

    method vertexAttrib1f : uint -> float -> unit meth

    method vertexAttrib1fv : uint -> float js_array t -> unit meth

    method vertexAttrib1fv_typed : uint -> Typed_array.float32Array t -> unit meth

    method vertexAttrib2f : uint -> float -> float -> unit meth

    method vertexAttrib2fv : uint -> float js_array t -> unit meth

    method vertexAttrib2fv_typed : uint -> Typed_array.float32Array t -> unit meth

    method vertexAttrib3f : uint -> float -> float -> float -> unit meth

    method vertexAttrib3fv : uint -> float js_array t -> unit meth

    method vertexAttrib3fv_typed : uint -> Typed_array.float32Array t -> unit meth

    method vertexAttrib4f : uint -> float -> float -> float -> float -> unit meth

    method vertexAttrib4fv : uint -> float js_array t -> unit meth

    method vertexAttrib4fv_typed : uint -> Typed_array.float32Array t -> unit meth

    method vertexAttribPointer :
      uint -> int -> dataType -> bool t -> sizei -> intptr -> unit meth

    (** 5.13.11 Writing to the drawing buffer *)

    method clear : clearBufferMask -> unit meth

    method drawArrays : beginMode -> int -> sizei -> unit meth

    method drawElements : beginMode -> sizei -> dataType -> intptr -> unit meth

    method finish : unit meth

    method flush : unit meth

    (** 5.13.12 Reading back pixels *)

    method readPixels :
         int
      -> int
      -> sizei
      -> sizei
      -> pixelFormat
      -> pixelType
      -> #Typed_array.arrayBufferView t
      -> unit meth

    (** 5.13.13 Detecting context lost events *)

    method isContextLost : bool t meth

    (** 5.13.14 Detecting and enabling extensions *)

    method getSupportedExtensions : js_string t js_array t meth

    method getExtension : 'a. js_string t -> 'a t opt meth

    (* Untyped! *)
    (** Constants *)

    method _DEPTH_BUFFER_BIT_ : clearBufferMask readonly_prop

    method _STENCIL_BUFFER_BIT_ : clearBufferMask readonly_prop

    method _COLOR_BUFFER_BIT_ : clearBufferMask readonly_prop

    method _POINTS : beginMode readonly_prop

    method _LINES : beginMode readonly_prop

    method _LINE_LOOP_ : beginMode readonly_prop

    method _LINE_STRIP_ : beginMode readonly_prop

    method _TRIANGLES : beginMode readonly_prop

    method _TRIANGLE_STRIP_ : beginMode readonly_prop

    method _TRIANGLE_FAN_ : beginMode readonly_prop

    method _ZERO : blendingFactor readonly_prop

    method _ONE : blendingFactor readonly_prop

    method _SRC_COLOR_ : blendingFactor readonly_prop

    method _ONE_MINUS_SRC_COLOR_ : blendingFactor readonly_prop

    method _SRC_ALPHA_ : blendingFactor readonly_prop

    method _ONE_MINUS_SRC_ALPHA_ : blendingFactor readonly_prop

    method _DST_ALPHA_ : blendingFactor readonly_prop

    method _ONE_MINUS_DST_ALPHA_ : blendingFactor readonly_prop

    method _DST_COLOR_ : blendingFactor readonly_prop

    method _ONE_MINUS_DST_COLOR_ : blendingFactor readonly_prop

    method _SRC_ALPHA_SATURATE_ : blendingFactor readonly_prop

    method _FUNC_ADD_ : blendMode readonly_prop

    method _FUNC_SUBTRACT_ : blendMode readonly_prop

    method _FUNC_REVERSE_SUBTRACT_ : blendMode readonly_prop

    method _CONSTANT_COLOR_ : blendMode readonly_prop

    method _ONE_MINUS_CONSTANT_COLOR_ : blendMode readonly_prop

    method _CONSTANT_ALPHA_ : blendMode readonly_prop

    method _ONE_MINUS_CONSTANT_ALPHA_ : blendMode readonly_prop

    method _ARRAY_BUFFER_ : bufferTarget readonly_prop

    method _ELEMENT_ARRAY_BUFFER_ : bufferTarget readonly_prop

    method _STREAM_DRAW_ : bufferUsage readonly_prop

    method _STATIC_DRAW_ : bufferUsage readonly_prop

    method _DYNAMIC_DRAW_ : bufferUsage readonly_prop

    method _FRONT : cullFaceMode readonly_prop

    method _BACK : cullFaceMode readonly_prop

    method _FRONT_AND_BACK_ : cullFaceMode readonly_prop

    method _CULL_FACE_ : enableCap readonly_prop

    method _BLEND : enableCap readonly_prop

    method _DITHER : enableCap readonly_prop

    method _STENCIL_TEST_ : enableCap readonly_prop

    method _DEPTH_TEST_ : enableCap readonly_prop

    method _SCISSOR_TEST_ : enableCap readonly_prop

    method _POLYGON_OFFSET_FILL_ : enableCap readonly_prop

    method _SAMPLE_ALPHA_TO_COVERAGE_ : enableCap readonly_prop

    method _SAMPLE_COVERAGE_ : enableCap readonly_prop

    method _NO_ERROR_ : errorCode readonly_prop

    method _INVALID_ENUM_ : errorCode readonly_prop

    method _INVALID_VALUE_ : errorCode readonly_prop

    method _INVALID_OPERATION_ : errorCode readonly_prop

    method _OUT_OF_MEMORY_ : errorCode readonly_prop

    method _CONTEXT_LOST_WEBGL_ : errorCode readonly_prop

    method _INVALID_FRAMEBUFFER_OPERATION_ : errorCode readonly_prop

    method _CW : frontFaceDir readonly_prop

    method _CCW : frontFaceDir readonly_prop

    method _DONT_CARE_ : hintMode readonly_prop

    method _FASTEST : hintMode readonly_prop

    method _NICEST : hintMode readonly_prop

    method _GENERATE_MIPMAP_HINT_ : hintTarget readonly_prop

    method _BLEND_EQUATION_ : blendMode parameter readonly_prop

    method _BLEND_EQUATION_RGB_ : blendMode parameter readonly_prop

    method _BLEND_EQUATION_ALPHA_ : blendMode parameter readonly_prop

    method _BLEND_DST_RGB_ : blendingFactor parameter readonly_prop

    method _BLEND_SRC_RGB_ : blendingFactor parameter readonly_prop

    method _BLEND_DST_ALPHA_ : blendingFactor parameter readonly_prop

    method _BLEND_SRC_ALPHA_ : blendingFactor parameter readonly_prop

    method _BLEND_COLOR_ : Typed_array.float32Array t parameter readonly_prop

    method _ARRAY_BUFFER_BINDING_ : buffer t opt parameter readonly_prop

    method _ELEMENT_ARRAY_BUFFER_BINDING_ : buffer t opt parameter readonly_prop

    method _CULL_FACE_PARAM : bool t parameter readonly_prop

    method _BLEND_PARAM : bool t parameter readonly_prop

    method _DITHER_PARAM : bool t parameter readonly_prop

    method _STENCIL_TEST_PARAM : bool t parameter readonly_prop

    method _DEPTH_TEST_PARAM : bool t parameter readonly_prop

    method _SCISSOR_TEST_PARAM : bool t parameter readonly_prop

    method _POLYGON_OFFSET_FILL_PARAM : bool t parameter readonly_prop

    method _LINE_WIDTH_ : float parameter readonly_prop

    method _ALIASED_POINT_SIZE_RANGE_ : Typed_array.float32Array t parameter readonly_prop

    method _ALIASED_LINE_WIDTH_RANGE_ : Typed_array.float32Array t parameter readonly_prop

    method _CULL_FACE_MODE_ : cullFaceMode parameter readonly_prop

    method _FRONT_FACE_ : frontFaceDir parameter readonly_prop

    method _DEPTH_RANGE_ : Typed_array.float32Array t parameter readonly_prop

    method _DEPTH_WRITEMASK_ : bool t parameter readonly_prop

    method _DEPTH_CLEAR_VALUE_ : float parameter readonly_prop

    method _DEPTH_FUNC_ : depthFunction parameter readonly_prop

    method _STENCIL_CLEAR_VALUE_ : int parameter readonly_prop

    method _STENCIL_FUNC_ : int parameter readonly_prop

    method _STENCIL_FAIL_ : int parameter readonly_prop

    method _STENCIL_PASS_DEPTH_FAIL_ : int parameter readonly_prop

    method _STENCIL_PASS_DEPTH_PASS_ : int parameter readonly_prop

    method _STENCIL_REF_ : int parameter readonly_prop

    method _STENCIL_VALUE_MASK_ : int parameter readonly_prop

    method _STENCIL_WRITEMASK_ : int parameter readonly_prop

    method _STENCIL_BACK_FUNC_ : int parameter readonly_prop

    method _STENCIL_BACK_FAIL_ : int parameter readonly_prop

    method _STENCIL_BACK_PASS_DEPTH_FAIL_ : int parameter readonly_prop

    method _STENCIL_BACK_PASS_DEPTH_PASS_ : int parameter readonly_prop

    method _STENCIL_BACK_REF_ : int parameter readonly_prop

    method _STENCIL_BACK_VALUE_MASK_ : int parameter readonly_prop

    method _STENCIL_BACK_WRITEMASK_ : int parameter readonly_prop

    method _VIEWPORT : Typed_array.int32Array t parameter readonly_prop

    method _SCISSOR_BOX_ : Typed_array.int32Array t parameter readonly_prop

    method _COLOR_CLEAR_VALUE_ : Typed_array.float32Array t parameter readonly_prop

    method _COLOR_WRITEMASK_ : bool t js_array t parameter readonly_prop

    method _UNPACK_ALIGNMENT_PARAM : int parameter readonly_prop

    method _PACK_ALIGNMENT_ : int parameter readonly_prop

    method _MAX_TEXTURE_SIZE_ : int parameter readonly_prop

    method _MAX_VIEWPORT_DIMS_ : Typed_array.int32Array t parameter readonly_prop

    method _SUBPIXEL_BITS_ : int parameter readonly_prop

    method _RED_BITS_ : int parameter readonly_prop

    method _GREEN_BITS_ : int parameter readonly_prop

    method _BLUE_BITS_ : int parameter readonly_prop

    method _ALPHA_BITS_ : int parameter readonly_prop

    method _DEPTH_BITS_ : int parameter readonly_prop

    method _STENCIL_BITS_ : int parameter readonly_prop

    method _POLYGON_OFFSET_UNITS_ : float parameter readonly_prop

    method _POLYGON_OFFSET_FACTOR_ : float parameter readonly_prop

    method _TEXTURE_BINDING_2D_ : texture t opt parameter readonly_prop

    method _TEXTURE_BINDING_CUBE_MAP_ : texture t opt parameter readonly_prop

    method _SAMPLE_BUFFERS_ : int parameter readonly_prop

    method _SAMPLES_ : int parameter readonly_prop

    method _SAMPLE_COVERAGE_VALUE_ : float parameter readonly_prop

    method _SAMPLE_COVERAGE_INVERT_ : bool t parameter readonly_prop

    method _NUM_COMPRESSED_TEXTURE_FORMATS_ : int parameter readonly_prop

    method _COMPRESSED_TEXTURE_FORMATS_ :
      Typed_array.uint32Array t parameter readonly_prop

    method _GENERATE_MIPMAP_HINT_PARAM_ : hintMode parameter readonly_prop

    method _BUFFER_SIZE_ : int bufferParameter readonly_prop

    method _BUFFER_USAGE_ : bufferUsage bufferParameter readonly_prop

    method _BYTE : dataType readonly_prop

    method _UNSIGNED_BYTE_DT : dataType readonly_prop

    method _SHORT : dataType readonly_prop

    method _UNSIGNED_SHORT_ : dataType readonly_prop

    method _INT : dataType readonly_prop

    method _UNSIGNED_INT_ : dataType readonly_prop

    method _FLOAT : dataType readonly_prop

    method _UNSIGNED_BYTE_ : pixelType readonly_prop

    method _UNSIGNED_SHORT_4_4_4_4_ : pixelType readonly_prop

    method _UNSIGNED_SHORT_5_5_5_1_ : pixelType readonly_prop

    method _UNSIGNED_SHORT_5_6_5_ : pixelType readonly_prop

    method _ALPHA : pixelFormat readonly_prop

    method _RGB : pixelFormat readonly_prop

    method _RGBA : pixelFormat readonly_prop

    method _LUMINANCE : pixelFormat readonly_prop

    method _LUMINANCE_ALPHA_ : pixelFormat readonly_prop

    method _STENCIL_INDEX_ : pixelFormat readonly_prop

    method _DEPTH_STENCIL_ : pixelFormat readonly_prop

    method _DEPTH_COMPONENT_ : pixelFormat readonly_prop

    method _FRAGMENT_SHADER_ : shaderType readonly_prop

    method _VERTEX_SHADER_ : shaderType readonly_prop

    method _MAX_VERTEX_ATTRIBS_ : int parameter readonly_prop

    method _MAX_VERTEX_UNIFORM_VECTORS_ : int parameter readonly_prop

    method _MAX_VARYING_VECTORS_ : int parameter readonly_prop

    method _MAX_COMBINED_TEXTURE_IMAGE_UNITS_ : int parameter readonly_prop

    method _MAX_VERTEX_TEXTURE_IMAGE_UNITS_ : int parameter readonly_prop

    method _MAX_TEXTURE_IMAGE_UNITS_ : int parameter readonly_prop

    method _MAX_FRAGMENT_UNIFORM_VECTORS_ : int parameter readonly_prop

    method _SHADER_TYPE_ : shaderType shaderParam readonly_prop

    method _DELETE_STATUS_ : bool t shaderParam readonly_prop

    method _COMPILE_STATUS_ : bool t shaderParam readonly_prop

    method _DELETE_STATUS_PROG : bool t programParam readonly_prop

    method _LINK_STATUS_ : bool t programParam readonly_prop

    method _VALIDATE_STATUS_ : bool t programParam readonly_prop

    method _ATTACHED_SHADERS_ : int programParam readonly_prop

    method _ACTIVE_UNIFORMS_ : int programParam readonly_prop

    method _ACTIVE_ATTRIBUTES_ : int programParam readonly_prop

    method _SHADING_LANGUAGE_VERSION_ : js_string t parameter readonly_prop

    method _CURRENT_PROGRAM_ : program t opt parameter readonly_prop

    method _VENDOR : js_string t parameter readonly_prop

    method _RENDERER : js_string t parameter readonly_prop

    method _VERSION : js_string t parameter readonly_prop

    method _MAX_CUBE_MAP_TEXTURE_SIZE_ : int parameter readonly_prop

    method _ACTIVE_TEXTURE_ : int parameter readonly_prop

    method _FRAMEBUFFER_BINDING_ : framebuffer t opt parameter readonly_prop

    method _RENDERBUFFER_BINDING_ : renderbuffer t opt parameter readonly_prop

    method _MAX_RENDERBUFFER_SIZE : int parameter readonly_prop

    method _NEVER : depthFunction readonly_prop

    method _LESS : depthFunction readonly_prop

    method _EQUAL : depthFunction readonly_prop

    method _LEQUAL : depthFunction readonly_prop

    method _GREATER : depthFunction readonly_prop

    method _NOTEQUAL : depthFunction readonly_prop

    method _GEQUAL : depthFunction readonly_prop

    method _ALWAYS : depthFunction readonly_prop

    method _KEEP : stencilOp readonly_prop

    method _REPLACE : stencilOp readonly_prop

    method _INCR : stencilOp readonly_prop

    method _DECR : stencilOp readonly_prop

    method _INVERT : stencilOp readonly_prop

    method _INCR_WRAP_ : stencilOp readonly_prop

    method _DECR_WRAP_ : stencilOp readonly_prop

    method _ZERO_ : stencilOp readonly_prop

    method _NEAREST : texFilter readonly_prop

    method _LINEAR : texFilter readonly_prop

    method _NEAREST_MIPMAP_NEAREST_ : texFilter readonly_prop

    method _LINEAR_MIPMAP_NEAREST_ : texFilter readonly_prop

    method _NEAREST_MIPMAP_LINEAR_ : texFilter readonly_prop

    method _LINEAR_MIPMAP_LINEAR_ : texFilter readonly_prop

    method _TEXTURE_MAG_FILTER_ : texFilter texParam readonly_prop

    method _TEXTURE_MIN_FILTER_ : texFilter texParam readonly_prop

    method _TEXTURE_WRAP_S_ : wrapMode texParam readonly_prop

    method _TEXTURE_WRAP_T_ : wrapMode texParam readonly_prop

    method _NONE_OT : objectType readonly_prop

    method _TEXTURE_OT : objectType readonly_prop

    method _RENDERBUFFER_OT : objectType readonly_prop

    method _TEXTURE_2D_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_POSITIVE_X_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_NEGATIVE_X_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_POSITIVE_Y_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_NEGATIVE_Y_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_POSITIVE_Z_ : texTarget readonly_prop

    method _TEXTURE_CUBE_MAP_NEGATIVE_Z_ : texTarget readonly_prop

    method _TEXTURE0 : textureUnit readonly_prop

    method _TEXTURE1 : textureUnit readonly_prop

    method _TEXTURE2 : textureUnit readonly_prop

    method _TEXTURE3 : textureUnit readonly_prop

    method _TEXTURE4 : textureUnit readonly_prop

    method _TEXTURE5 : textureUnit readonly_prop

    method _TEXTURE6 : textureUnit readonly_prop

    method _TEXTURE7 : textureUnit readonly_prop

    method _TEXTURE8 : textureUnit readonly_prop

    method _TEXTURE9 : textureUnit readonly_prop

    method _TEXTURE10 : textureUnit readonly_prop

    method _TEXTURE11 : textureUnit readonly_prop

    method _TEXTURE12 : textureUnit readonly_prop

    method _TEXTURE13 : textureUnit readonly_prop

    method _TEXTURE14 : textureUnit readonly_prop

    method _TEXTURE15 : textureUnit readonly_prop

    method _TEXTURE16 : textureUnit readonly_prop

    method _TEXTURE17 : textureUnit readonly_prop

    method _TEXTURE18 : textureUnit readonly_prop

    method _TEXTURE19 : textureUnit readonly_prop

    method _TEXTURE20 : textureUnit readonly_prop

    method _TEXTURE21 : textureUnit readonly_prop

    method _TEXTURE22 : textureUnit readonly_prop

    method _TEXTURE23 : textureUnit readonly_prop

    method _TEXTURE24 : textureUnit readonly_prop

    method _TEXTURE25 : textureUnit readonly_prop

    method _TEXTURE26 : textureUnit readonly_prop

    method _TEXTURE27 : textureUnit readonly_prop

    method _TEXTURE28 : textureUnit readonly_prop

    method _TEXTURE29 : textureUnit readonly_prop

    method _TEXTURE30 : textureUnit readonly_prop

    method _TEXTURE31 : textureUnit readonly_prop

    method _REPEAT : wrapMode readonly_prop

    method _CLAMP_TO_EDGE_ : wrapMode readonly_prop

    method _MIRRORED_REPEAT_ : wrapMode readonly_prop

    method _FLOAT_ : uniformType readonly_prop

    method _FLOAT_VEC2_ : uniformType readonly_prop

    method _FLOAT_VEC3_ : uniformType readonly_prop

    method _FLOAT_VEC4_ : uniformType readonly_prop

    method _INT_ : uniformType readonly_prop

    method _INT_VEC2_ : uniformType readonly_prop

    method _INT_VEC3_ : uniformType readonly_prop

    method _INT_VEC4_ : uniformType readonly_prop

    method _BOOL_ : uniformType readonly_prop

    method _BOOL_VEC2_ : uniformType readonly_prop

    method _BOOL_VEC3_ : uniformType readonly_prop

    method _BOOL_VEC4_ : uniformType readonly_prop

    method _FLOAT_MAT2_ : uniformType readonly_prop

    method _FLOAT_MAT3_ : uniformType readonly_prop

    method _FLOAT_MAT4_ : uniformType readonly_prop

    method _SAMPLER_2D_ : uniformType readonly_prop

    method _SAMPLER_CUBE_ : uniformType readonly_prop

    method _VERTEX_ATTRIB_ARRAY_ENABLED_ : bool t vertexAttribParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_SIZE_ : int vertexAttribParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_STRIDE_ : int vertexAttribParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_TYPE_ : int vertexAttribParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_NORMALIZED_ : bool t vertexAttribParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_POINTER_ : vertexAttribPointerParam readonly_prop

    method _VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ :
      buffer t opt vertexAttribParam readonly_prop

    method _CURRENT_VERTEX_ATTRIB_ :
      Typed_array.float32Array t vertexAttribParam readonly_prop

    method _LOW_FLOAT_ : shaderPrecisionType readonly_prop

    method _MEDIUM_FLOAT_ : shaderPrecisionType readonly_prop

    method _HIGH_FLOAT_ : shaderPrecisionType readonly_prop

    method _LOW_INT_ : shaderPrecisionType readonly_prop

    method _MEDIUM_INT_ : shaderPrecisionType readonly_prop

    method _HIGH_INT_ : shaderPrecisionType readonly_prop

    method _FRAMEBUFFER : fbTarget readonly_prop

    method _RENDERBUFFER : rbTarget readonly_prop

    method _RGBA4 : format readonly_prop

    method _RGB5_A1_ : format readonly_prop

    method _RGB565 : format readonly_prop

    method _DEPTH_COMPONENT16_ : format readonly_prop

    method _STENCIL_INDEX8_ : format readonly_prop

    method _RENDERBUFFER_WIDTH_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_HEIGHT_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_INTERNAL_FORMAT_ : format renderbufferParam readonly_prop

    method _RENDERBUFFER_RED_SIZE_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_GREEN_SIZE_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_BLUE_SIZE_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_ALPHA_SIZE_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_DEPTH_SIZE_ : int renderbufferParam readonly_prop

    method _RENDERBUFFER_STENCIL_SIZE_ : int renderbufferParam readonly_prop

    method _FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_ : objectType attachParam readonly_prop

    method _FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_RENDERBUFFER :
      renderbuffer t attachParam readonly_prop

    method _FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_TEXTURE :
      texture t attachParam readonly_prop

    method _FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_ : int attachParam readonly_prop

    method _FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_ : int attachParam readonly_prop

    method _COLOR_ATTACHMENT0_ : attachmentPoint readonly_prop

    method _DEPTH_ATTACHMENT_ : attachmentPoint readonly_prop

    method _STENCIL_ATTACHMENT_ : attachmentPoint readonly_prop

    method _DEPTH_STENCIL_ATTACHMENT_ : attachmentPoint readonly_prop

    method _FRAMEBUFFER_COMPLETE_ : framebufferStatus readonly_prop

    method _FRAMEBUFFER_INCOMPLETE_ATTACHMENT_ : framebufferStatus readonly_prop

    method _FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_ : framebufferStatus readonly_prop

    method _FRAMEBUFFER_INCOMPLETE_DIMENSIONS_ : framebufferStatus readonly_prop

    method _FRAMEBUFFER_UNSUPPORTED_ : framebufferStatus readonly_prop

    method _UNPACK_FLIP_Y_WEBGL_PARAM : bool t parameter readonly_prop

    method _UNPACK_PREMULTIPLY_ALPHA_WEBGL_PARAM : bool t parameter readonly_prop

    method _UNPACK_COLORSPACE_CONVERSION_WEBGL_PARAM :
      colorspaceConversion parameter readonly_prop

    method _NONE : colorspaceConversion readonly_prop

    method _BROWSER_DEFAULT_WEBGL_ : colorspaceConversion readonly_prop

    method _UNPACK_ALIGNMENT_ : int pixelStoreParam readonly_prop

    method _UNPACK_FLIP_Y_WEBGL_ : bool t pixelStoreParam readonly_prop

    method _UNPACK_PREMULTIPLY_ALPHA_WEBGL_ : bool t pixelStoreParam readonly_prop

    method _UNPACK_COLORSPACE_CONVERSION_WEBGL_ : int pixelStoreParam readonly_prop
  end

(** 5.14 WebGLContextEvent *)

class type contextEvent =
  object
    inherit Dom_html.event

    method statusMessage : js_string t readonly_prop
  end

module Event = struct
  let webglcontextlost = Dom_html.Event.make "webglcontextlost"

  let webglcontextrestored = Dom_html.Event.make "webglcontextrestored"

  let webglcontextcreationerror = Dom_html.Event.make "webglcontextcreationerror"
end

(****)

class type canvasElement =
  object
    method getContext : js_string t -> renderingContext t opt meth

    method getContext_ : js_string t -> contextAttributes t -> renderingContext t opt meth
  end

let getContext (c : Dom_html.canvasElement t) =
  let c : canvasElement t = Js.Unsafe.coerce c in
  let ctx = c##getContext (Js.string "webgl") in
  if Opt.test ctx then ctx else c ## (getContext (Js.string "experimental-webgl"))

let getContextWithAttributes (c : Dom_html.canvasElement t) attribs =
  let c : canvasElement t = Js.Unsafe.coerce c in
  let ctx = c##getContext_ (Js.string "webgl") attribs in
  if Opt.test ctx then ctx else c##getContext_ (Js.string "experimental-webgl") attribs