GL

Class Fields

`static var ACTIVE_ATTRIBUTES:Int`

`static var ACTIVE_TEXTURE:Int`

`static var ACTIVE_UNIFORMS:Int`

`static var ALIASED_LINE_WIDTH_RANGE:Int`

`static var ALIASED_POINT_SIZE_RANGE:Int`

`static var ALPHA:Int`

`static var ALPHA_BITS:Int`

`static var ALWAYS:Int`

`static var ARRAY_BUFFER:Int`

`static var ARRAY_BUFFER_BINDING:Int`

`static var ATTACHED_SHADERS:Int`

`static var BACK:Int`

`static var BGRA_EXT:Int`

`static var BGR_EXT:Int`

`static var BLEND:Int`

`static var BLEND_COLOR:Int`

`static var BLEND_DST_ALPHA:Int`

`static var BLEND_DST_RGB:Int`

`static var BLEND_EQUATION:Int`

`static var BLEND_EQUATION_ALPHA:Int`

`static var BLEND_EQUATION_RGB:Int`

`static var BLEND_SRC_ALPHA:Int`

`static var BLEND_SRC_RGB:Int`

`static var BLUE_BITS:Int`

`static var BOOL:Int`

`static var BOOL_VEC2:Int`

`static var BOOL_VEC3:Int`

`static var BOOL_VEC4:Int`

`static var BROWSER_DEFAULT_WEBGL:Int`

`static var BUFFER_SIZE:Int`

`static var BUFFER_USAGE:Int`

`static var BYTE:Int`

`static var CCW:Int`

`static var CLAMP_TO_EDGE:Int`

`static var COLOR_ATTACHMENT0:Int`

`static var COLOR_BUFFER_BIT:Int`

`static var COLOR_CLEAR_VALUE:Int`

`static var COLOR_WRITEMASK:Int`

`static var COMPILE_STATUS:Int`

`static var COMPRESSED_TEXTURE_FORMATS:Int`

`static var CONSTANT_ALPHA:Int`

`static var CONSTANT_COLOR:Int`

`static var CONTEXT_LOST_WEBGL:Int`

`static var CULL_FACE:Int`

`static var CULL_FACE_MODE:Int`

`static var CURRENT_PROGRAM:Int`

`static var CURRENT_VERTEX_ATTRIB:Int`

`static var CW:Int`

`static var DECR:Int`

`static var DECR_WRAP:Int`

`static var DELETE_STATUS:Int`

`static var DEPTH_ATTACHMENT:Int`

`static var DEPTH_BITS:Int`

`static var DEPTH_BUFFER_BIT:Int`

`static var DEPTH_CLEAR_VALUE:Int`

`static var DEPTH_COMPONENT:Int`

`static var DEPTH_COMPONENT16:Int`

`static var DEPTH_FUNC:Int`

`static var DEPTH_RANGE:Int`

`static var DEPTH_STENCIL:Int`

`static var DEPTH_STENCIL_ATTACHMENT:Int`

`static var DEPTH_TEST:Int`

`static var DEPTH_WRITEMASK:Int`

`static var DITHER:Int`

`static var DONT_CARE:Int`

`static var DST_ALPHA:Int`

`static var DST_COLOR:Int`

`static var DYNAMIC_DRAW:Int`

`static var ELEMENT_ARRAY_BUFFER:Int`

`static var ELEMENT_ARRAY_BUFFER_BINDING:Int`

`static var EQUAL:Int`

`static var FASTEST:Int`

`static var FLOAT:Int`

`static var FLOAT_MAT2:Int`

`static var FLOAT_MAT3:Int`

`static var FLOAT_MAT4:Int`

`static var FLOAT_VEC2:Int`

`static var FLOAT_VEC3:Int`

`static var FLOAT_VEC4:Int`

`static var FRAGMENT_SHADER:Int`

`static var FRAMEBUFFER:Int`

`static var FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:Int`

`static var FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:Int`

`static var FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:Int`

`static var FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:Int`

`static var FRAMEBUFFER_BINDING:Int`

`static var FRAMEBUFFER_COMPLETE:Int`

`static var FRAMEBUFFER_INCOMPLETE_ATTACHMENT:Int`

`static var FRAMEBUFFER_INCOMPLETE_DIMENSIONS:Int`

`static var FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:Int`

`static var FRAMEBUFFER_UNSUPPORTED:Int`

`static var FRONT:Int`

`static var FRONT_AND_BACK:Int`

`static var FRONT_FACE:Int`

`static var FUNC_ADD:Int`

`static var FUNC_REVERSE_SUBTRACT:Int`

`static var FUNC_SUBTRACT:Int`

`static var GENERATE_MIPMAP_HINT:Int`

`static var GEQUAL:Int`

`static var GREATER:Int`

`static var GREEN_BITS:Int`

`static var HIGH_FLOAT:Int`

`static var HIGH_INT:Int`

`static var INCR:Int`

`static var INCR_WRAP:Int`

`static var INT:Int`

`static var INT_VEC2:Int`

`static var INT_VEC3:Int`

`static var INT_VEC4:Int`

`static var INVALID_ENUM:Int`

`static var INVALID_FRAMEBUFFER_OPERATION:Int`

`static var INVALID_OPERATION:Int`

`static var INVALID_VALUE:Int`

`static var INVERT:Int`

`static var KEEP:Int`

`static var LEQUAL:Int`

`static var LESS:Int`

`static var LINEAR:Int`

`static var LINEAR_MIPMAP_LINEAR:Int`

`static var LINEAR_MIPMAP_NEAREST:Int`

`static var LINES:Int`

`static var LINE_LOOP:Int`

`static var LINE_STRIP:Int`

`static var LINE_WIDTH:Int`

`static var LINK_STATUS:Int`

`static var LOW_FLOAT:Int`

`static var LOW_INT:Int`

`static var LUMINANCE:Int`

`static var LUMINANCE_ALPHA:Int`

`static var MAX_COMBINED_TEXTURE_IMAGE_UNITS:Int`

`static var MAX_CUBE_MAP_TEXTURE_SIZE:Int`

`static var MAX_FRAGMENT_UNIFORM_VECTORS:Int`

`static var MAX_RENDERBUFFER_SIZE:Int`

`static var MAX_TEXTURE_IMAGE_UNITS:Int`

`static var MAX_TEXTURE_SIZE:Int`

`static var MAX_VARYING_VECTORS:Int`

`static var MAX_VERTEX_ATTRIBS:Int`

`static var MAX_VERTEX_TEXTURE_IMAGE_UNITS:Int`

`static var MAX_VERTEX_UNIFORM_VECTORS:Int`

`static var MAX_VIEWPORT_DIMS:Int`

`static var MEDIUM_FLOAT:Int`

`static var MEDIUM_INT:Int`

`static var MIRRORED_REPEAT:Int`

`static var NEAREST:Int`

`static var NEAREST_MIPMAP_LINEAR:Int`

`static var NEAREST_MIPMAP_NEAREST:Int`

`static var NEVER:Int`

`static var NICEST:Int`

`static var NONE:Int`

`static var NOTEQUAL:Int`

`static var NO_ERROR:Int`

`static var ONE:Int`

`static var ONE_MINUS_CONSTANT_ALPHA:Int`

`static var ONE_MINUS_CONSTANT_COLOR:Int`

`static var ONE_MINUS_DST_ALPHA:Int`

`static var ONE_MINUS_DST_COLOR:Int`

`static var ONE_MINUS_SRC_ALPHA:Int`

`static var ONE_MINUS_SRC_COLOR:Int`

`static var OUT_OF_MEMORY:Int`

`static var PACK_ALIGNMENT:Int`

`static var POINTS:Int`

`static var POINT_SPRITE:Int`

`static var POLYGON_OFFSET_FACTOR:Int`

`static var POLYGON_OFFSET_FILL:Int`

`static var POLYGON_OFFSET_UNITS:Int`

`static var RED_BITS:Int`

`static var RENDERBUFFER:Int`

`static var RENDERBUFFER_ALPHA_SIZE:Int`

`static var RENDERBUFFER_BINDING:Int`

`static var RENDERBUFFER_BLUE_SIZE:Int`

`static var RENDERBUFFER_DEPTH_SIZE:Int`

`static var RENDERBUFFER_GREEN_SIZE:Int`

`static var RENDERBUFFER_HEIGHT:Int`

`static var RENDERBUFFER_INTERNAL_FORMAT:Int`

`static var RENDERBUFFER_RED_SIZE:Int`

`static var RENDERBUFFER_STENCIL_SIZE:Int`

`static var RENDERBUFFER_WIDTH:Int`

`static var RENDERER:Int`

`static var REPEAT:Int`

`static var REPLACE:Int`

`static var RGB:Int`

`static var RGB565:Int`

`static var RGB5_A1:Int`

`static var RGBA:Int`

`static var RGBA4:Int`

`static var SAMPLER_2D:Int`

`static var SAMPLER_CUBE:Int`

`static var SAMPLES:Int`

`static var SAMPLE_ALPHA_TO_COVERAGE:Int`

`static var SAMPLE_BUFFERS:Int`

`static var SAMPLE_COVERAGE:Int`

`static var SAMPLE_COVERAGE_INVERT:Int`

`static var SAMPLE_COVERAGE_VALUE:Int`

`static var SCISSOR_BOX:Int`

`static var SCISSOR_TEST:Int`

`static var SHADER_TYPE:Int`

`static var SHADING_LANGUAGE_VERSION:Int`

`static var SHORT:Int`

`static var SRC_ALPHA:Int`

`static var SRC_ALPHA_SATURATE:Int`

`static var SRC_COLOR:Int`

`static var STATIC_DRAW:Int`

`static var STENCIL_ATTACHMENT:Int`

`static var STENCIL_BACK_FAIL:Int`

`static var STENCIL_BACK_FUNC:Int`

`static var STENCIL_BACK_PASS_DEPTH_FAIL:Int`

`static var STENCIL_BACK_PASS_DEPTH_PASS:Int`

`static var STENCIL_BACK_REF:Int`

`static var STENCIL_BACK_VALUE_MASK:Int`

`static var STENCIL_BACK_WRITEMASK:Int`

`static var STENCIL_BITS:Int`

`static var STENCIL_BUFFER_BIT:Int`

`static var STENCIL_CLEAR_VALUE:Int`

`static var STENCIL_FAIL:Int`

`static var STENCIL_FUNC:Int`

`static var STENCIL_INDEX:Int`

`static var STENCIL_INDEX8:Int`

`static var STENCIL_PASS_DEPTH_FAIL:Int`

`static var STENCIL_PASS_DEPTH_PASS:Int`

`static var STENCIL_REF:Int`

`static var STENCIL_TEST:Int`

`static var STENCIL_VALUE_MASK:Int`

`static var STENCIL_WRITEMASK:Int`

`static var STREAM_DRAW:Int`

`static var SUBPIXEL_BITS:Int`

`static var TEXTURE:Int`

`static var TEXTURE0:Int`

`static var TEXTURE1:Int`

`static var TEXTURE10:Int`

`static var TEXTURE11:Int`

`static var TEXTURE12:Int`

`static var TEXTURE13:Int`

`static var TEXTURE14:Int`

`static var TEXTURE15:Int`

`static var TEXTURE16:Int`

`static var TEXTURE17:Int`

`static var TEXTURE18:Int`

`static var TEXTURE19:Int`

`static var TEXTURE2:Int`

`static var TEXTURE20:Int`

`static var TEXTURE21:Int`

`static var TEXTURE22:Int`

`static var TEXTURE23:Int`

`static var TEXTURE24:Int`

`static var TEXTURE25:Int`

`static var TEXTURE26:Int`

`static var TEXTURE27:Int`

`static var TEXTURE28:Int`

`static var TEXTURE29:Int`

`static var TEXTURE3:Int`

`static var TEXTURE30:Int`

`static var TEXTURE31:Int`

`static var TEXTURE4:Int`

`static var TEXTURE5:Int`

`static var TEXTURE6:Int`

`static var TEXTURE7:Int`

`static var TEXTURE8:Int`

`static var TEXTURE9:Int`

`static var TEXTURE_2D:Int`

`static var TEXTURE_BINDING_2D:Int`

`static var TEXTURE_BINDING_CUBE_MAP:Int`

`static var TEXTURE_CUBE_MAP:Int`

`static var TEXTURE_CUBE_MAP_NEGATIVE_X:Int`

`static var TEXTURE_CUBE_MAP_NEGATIVE_Y:Int`

`static var TEXTURE_CUBE_MAP_NEGATIVE_Z:Int`

`static var TEXTURE_CUBE_MAP_POSITIVE_X:Int`

`static var TEXTURE_CUBE_MAP_POSITIVE_Y:Int`

`static var TEXTURE_CUBE_MAP_POSITIVE_Z:Int`

`static var TEXTURE_MAG_FILTER:Int`

`static var TEXTURE_MIN_FILTER:Int`

`static var TEXTURE_WRAP_S:Int`

`static var TEXTURE_WRAP_T:Int`

`static var TRIANGLES:Int`

`static var TRIANGLE_FAN:Int`

`static var TRIANGLE_STRIP:Int`

`static var UNPACK_ALIGNMENT:Int`

`static var UNPACK_COLORSPACE_CONVERSION_WEBGL:Int`

`static var UNPACK_FLIP_Y_WEBGL:Int`

`static var UNPACK_PREMULTIPLY_ALPHA_WEBGL:Int`

`static var UNSIGNED_BYTE:Int`

`static var UNSIGNED_INT:Int`

`static var UNSIGNED_SHORT:Int`

`static var UNSIGNED_SHORT_4_4_4_4:Int`

`static var UNSIGNED_SHORT_5_5_5_1:Int`

`static var UNSIGNED_SHORT_5_6_5:Int`

`static var VALIDATE_STATUS:Int`

`static var VENDOR:Int`

`static var VERSION:Int`

`static var VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:Int`

`static var VERTEX_ATTRIB_ARRAY_ENABLED:Int`

`static var VERTEX_ATTRIB_ARRAY_NORMALIZED:Int`

`static var VERTEX_ATTRIB_ARRAY_POINTER:Int`

`static var VERTEX_ATTRIB_ARRAY_SIZE:Int`

`static var VERTEX_ATTRIB_ARRAY_STRIDE:Int`

`static var VERTEX_ATTRIB_ARRAY_TYPE:Int`

`static var VERTEX_PROGRAM_POINT_SIZE:Int`

`static var VERTEX_SHADER:Int`

`static var VIEWPORT:Int`

`static var ZERO:Int`

`static var version:Int`

`static function activeTexture(texture:Int): Void`

`static function attachShader(program:GLProgram, shader:GLShader): Void`

`static function bindAttribLocation(program:GLProgram, index:Int, name:String): Void`

`static function bindBuffer(target:Int, buffer:GLBuffer): Void`

`static function bindFramebuffer(target:Int, framebuffer:GLFramebuffer): Void`

`static function bindRenderbuffer(target:Int, renderbuffer:GLRenderbuffer): Void`

`static function bindTexture(target:Int, texture:GLTexture): Void`

`static function blendColor(red:Float, green:Float, blue:Float, alpha:Float): Void`

`static function blendEquation(mode:Int): Void`

`static function blendEquationSeparate(modeRGB:Int, modeAlpha:Int): Void`

`static function blendFunc(sfactor:Int, dfactor:Int): Void`

`static function blendFuncSeparate(srcRGB:Int, dstRGB:Int, srcAlpha:Int, dstAlpha:Int): Void`

`static function bufferData(target:Int, data:ArrayBufferView, usage:Int): Void`

`static function bufferSubData(target:Int, offset:Int, data:ArrayBufferView): Void`

`static function checkFramebufferStatus(target:Int): Int`

`static function clear(mask:Int): Void`

`static function clearColor(red:Float, green:Float, blue:Float, alpha:Float): Void`

`static function clearDepth(depth:Float): Void`

`static function clearStencil(s:Int): Void`

`static function colorMask(red:Bool, green:Bool, blue:Bool, alpha:Bool): Void`

`static function compileShader(shader:GLShader): Void`

`static function compressedTexImage2D(target:Int, level:Int, internalformat:Int, width:Int, height:Int, border:Int, data:ArrayBufferView): Void`

`static function compressedTexSubImage2D(target:Int, level:Int, xoffset:Int, yoffset:Int, width:Int, height:Int, format:Int, data:ArrayBufferView): Void`

`static function copyTexImage2D(target:Int, level:Int, internalformat:Int, x:Int, y:Int, width:Int, height:Int, border:Int): Void`

`static function copyTexSubImage2D(target:Int, level:Int, xoffset:Int, yoffset:Int, x:Int, y:Int, width:Int, height:Int): Void`

`static function createBuffer(): GLBuffer`

`static function createFramebuffer(): GLFramebuffer`

`static function createProgram(): GLProgram`

`static function createRenderbuffer(): GLRenderbuffer`

`static function createShader(type:Int): GLShader`

`static function createTexture(): GLTexture`

`static function cullFace(mode:Int): Void`

`static function deleteBuffer(buffer:GLBuffer): Void`

`static function deleteFramebuffer(framebuffer:GLFramebuffer): Void`

`static function deleteProgram(program:GLProgram): Void`

`static function deleteRenderbuffer(renderbuffer:GLRenderbuffer): Void`

`static function deleteShader(shader:GLShader): Void`

`static function deleteTexture(texture:GLTexture): Void`

`static function depthFunc(func:Int): Void`

`static function depthMask(flag:Bool): Void`

`static function depthRange(zNear:Float, zFar:Float): Void`

`static function detachShader(program:GLProgram, shader:GLShader): Void`

`static function disable(cap:Int): Void`

`static function disableVertexAttribArray(index:Int): Void`

`static function drawArrays(mode:Int, first:Int, count:Int): Void`

`static function drawElements(mode:Int, count:Int, type:Int, offset:Int): Void`

`static function enable(cap:Int): Void`

`static function enableVertexAttribArray(index:Int): Void`

`static function finish(): Void`

`static function flush(): Void`

`static function framebufferRenderbuffer(target:Int, attachment:Int, renderbuffertarget:Int, renderbuffer:GLRenderbuffer): Void`

`static function framebufferTexture2D(target:Int, attachment:Int, textarget:Int, texture:GLTexture, level:Int): Void`

`static function frontFace(mode:Int): Void`

`static function generateMipmap(target:Int): Void`

`static function getActiveAttrib(program:GLProgram, index:Int): GLActiveInfo`

`static function getActiveUniform(program:GLProgram, index:Int): GLActiveInfo`

`static function getAttachedShaders(program:GLProgram): Array<GLShader>`

`static function getAttribLocation(program:GLProgram, name:String): Int`

`static function getBufferParameter(target:Int, pname:Int): Int`

`static function getContextAttributes(): GLContextAttributes`

`static function getError(): Int`

`static function getExtension(name:String): Dynamic`

`static function getFramebufferAttachmentParameter(target:Int, attachment:Int, pname:Int): Int`

`static function getParameter(pname:Int): Dynamic`

`static function getProgramInfoLog(program:GLProgram): String`

`static function getProgramParameter(program:GLProgram, pname:Int): Int`

`static function getRenderbufferParameter(target:Int, pname:Int): Int`

`static function getShaderInfoLog(shader:GLShader): String`

`static function getShaderParameter(shader:GLShader, pname:Int): Int`

`static function getShaderPrecisionFormat(shadertype:Int, precisiontype:Int): GLShaderPrecisionFormat`

`static function getShaderSource(shader:GLShader): String`

`static function getSupportedExtensions(): Array<String>`

`static function getTexParameter(target:Int, pname:Int): Int`

`static function getUniform(program:GLProgram, location:GLUniformLocation): Dynamic`

`static function getUniformLocation(program:GLProgram, name:String): GLUniformLocation`

`static function getVertexAttrib(index:Int, pname:Int): Int`

`static function getVertexAttribOffset(index:Int, pname:Int): Int`

`static function hint(target:Int, mode:Int): Void`

`static function isBuffer(buffer:GLBuffer): Bool`

`static function isContextLost(): Bool`

`static function isEnabled(cap:Int): Bool`

`static function isFramebuffer(framebuffer:GLFramebuffer): Bool`

`static function isProgram(program:GLProgram): Bool`

`static function isRenderbuffer(renderbuffer:GLRenderbuffer): Bool`

`static function isShader(shader:GLShader): Bool`

`static function isTexture(texture:GLTexture): Bool`

`static function lineWidth(width:Float): Void`

`static function linkProgram(program:GLProgram): Void`

`static function pixelStorei(pname:Int, param:Int): Void`

`static function polygonOffset(factor:Float, units:Float): Void`

`static function readPixels(x:Int, y:Int, width:Int, height:Int, format:Int, type:Int, pixels:ArrayBufferView): Void`

`static function renderbufferStorage(target:Int, internalformat:Int, width:Int, height:Int): Void`

`static function sampleCoverage(value:Float, invert:Bool): Void`

`static function scissor(x:Int, y:Int, width:Int, height:Int): Void`

`static function shaderSource(shader:GLShader, source:String): Void`

`static function stencilFunc(func:Int, ref:Int, mask:Int): Void`

`static function stencilFuncSeparate(face:Int, func:Int, ref:Int, mask:Int): Void`

`static function stencilMask(mask:Int): Void`

`static function stencilMaskSeparate(face:Int, mask:Int): Void`

`static function stencilOp(fail:Int, zfail:Int, zpass:Int): Void`

`static function stencilOpSeparate(face:Int, fail:Int, zfail:Int, zpass:Int): Void`

`static function texImage2D(target:Int, level:Int, internalformat:Int, width:Int, height:Int, border:Int, format:Int, type:Int, pixels:ArrayBufferView): Void`

`static function texParameterf(target:Int, pname:Int, param:Float): Void`

`static function texParameteri(target:Int, pname:Int, param:Int): Void`

`static function texSubImage2D(target:Int, level:Int, xoffset:Int, yoffset:Int, width:Int, height:Int, format:Int, type:Int, pixels:ArrayBufferView): Void`

`static function uniform1f(location:GLUniformLocation, x:Float): Void`

`static function uniform1fv(location:GLUniformLocation, x:Float32Array): Void`

`static function uniform1i(location:GLUniformLocation, x:Int): Void`

`static function uniform1iv(location:GLUniformLocation, v:Int32Array): Void`

`static function uniform2f(location:GLUniformLocation, x:Float, y:Float): Void`

`static function uniform2fv(location:GLUniformLocation, v:Float32Array): Void`

`static function uniform2i(location:GLUniformLocation, x:Int, y:Int): Void`

`static function uniform2iv(location:GLUniformLocation, v:Int32Array): Void`

`static function uniform3f(location:GLUniformLocation, x:Float, y:Float, z:Float): Void`

`static function uniform3fv(location:GLUniformLocation, v:Float32Array): Void`

`static function uniform3i(location:GLUniformLocation, x:Int, y:Int, z:Int): Void`

`static function uniform3iv(location:GLUniformLocation, v:Int32Array): Void`

`static function uniform4f(location:GLUniformLocation, x:Float, y:Float, z:Float, w:Float): Void`

`static function uniform4fv(location:GLUniformLocation, v:Float32Array): Void`

`static function uniform4i(location:GLUniformLocation, x:Int, y:Int, z:Int, w:Int): Void`

`static function uniform4iv(location:GLUniformLocation, v:Int32Array): Void`

`static function uniformMatrix2fv(location:GLUniformLocation, transpose:Bool, v:Float32Array): Void`

`static function uniformMatrix3fv(location:GLUniformLocation, transpose:Bool, v:Float32Array): Void`

`static function uniformMatrix4fv(location:GLUniformLocation, transpose:Bool, v:Float32Array): Void`

`static function useProgram(program:GLProgram): Void`

`static function validateProgram(program:GLProgram): Void`

`static function vertexAttrib1f(indx:Int, x:Float): Void`

`static function vertexAttrib1fv(indx:Int, values:Float32Array): Void`

`static function vertexAttrib2f(indx:Int, x:Float, y:Float): Void`

`static function vertexAttrib2fv(indx:Int, values:Float32Array): Void`

`static function vertexAttrib3f(indx:Int, x:Float, y:Float, z:Float): Void`

`static function vertexAttrib3fv(indx:Int, values:Float32Array): Void`

`static function vertexAttrib4f(indx:Int, x:Float, y:Float, z:Float, w:Float): Void`

`static function vertexAttrib4fv(indx:Int, values:Float32Array): Void`

`static function vertexAttribPointer(indx:Int, size:Int, type:Int, normalized:Bool, stride:Int, offset:Int): Void`

`static function viewport(x:Int, y:Int, width:Int, height:Int): Void`