Reset

Reset.hx

    function reset( gl: RenderingContext ): RenderingContext {
        var numAttribs = gl.getParameter( RenderingContext.MAX_VERTEX_ATTRIBS );
        var tmp = gl.createBuffer();
        gl.bindBuffer( RenderingContext.ARRAY_BUFFER, tmp );
        for( ii in  0...numAttribs ){
            gl.disableVertexAttribArray( ii );
            gl.vertexAttribPointer(ii, 4, RenderingContext.FLOAT, false, 0, 0 );
            gl.vertexAttrib1f( ii, 0 );
        }
        gl.deleteBuffer( tmp );
        var numTextureUnits = gl.getParameter( RenderingContext.MAX_TEXTURE_IMAGE_UNITS );
        for( ii in 0...numTextureUnits ){
            gl.activeTexture( RenderingContext.TEXTURE0 + ii );
            gl.bindTexture( RenderingContext.TEXTURE_CUBE_MAP, null );
            gl.bindTexture( RenderingContext.TEXTURE_2D, null );
        }
        gl.activeTexture( RenderingContext.TEXTURE0 );
        gl.useProgram( null );
        gl.bindBuffer( RenderingContext.ARRAY_BUFFER, null );
        gl.bindBuffer( RenderingContext.ELEMENT_ARRAY_BUFFER, null );
        gl.bindFramebuffer( RenderingContext.FRAMEBUFFER, null );
        gl.bindRenderbuffer( RenderingContext.RENDERBUFFER, null );
        gl.disable( RenderingContext.BLEND );
        gl.disable( RenderingContext.CULL_FACE );
        gl.disable( RenderingContext.DEPTH_TEST );
        gl.disable( RenderingContext.DITHER );
        gl.disable( RenderingContext.SCISSOR_TEST );
        gl.blendColor( 0, 0, 0, 0 );
        gl.blendEquation( RenderingContext.FUNC_ADD );
        gl.blendFunc( RenderingContext.ONE, RenderingContext.ZERO );
        gl.clearColor( 0, 0, 0, 0 );
        gl.clearDepth( 1 );
        gl.clearStencil( -1 );
        gl.colorMask( true, true, true, true );
        gl.cullFace( RenderingContext.BACK );
        gl.depthFunc( RenderingContext.LESS );
        gl.depthMask( true );
        gl.depthRange( 0, 1 );
        gl.frontFace( RenderingContext.CCW );
        gl.hint( RenderingContext.GENERATE_MIPMAP_HINT, RenderingContext.DONT_CARE );
        gl.lineWidth( 1 );
        gl.pixelStorei( RenderingContext.PACK_ALIGNMENT, 4 );
        gl.pixelStorei( RenderingContext.UNPACK_ALIGNMENT, 4 );
        gl.pixelStorei( RenderingContext.UNPACK_FLIP_Y_WEBGL, 0 );// false?
        gl.pixelStorei( RenderingContext.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0 );// false?
        gl.polygonOffset( 0, 0 );
        gl.sampleCoverage( 1, false );
        gl.scissor( 0, 0, gl.canvas.width, gl.canvas.height );
        gl.stencilFunc( RenderingContext.ALWAYS, 0, 0xFFFFFFFF );
        gl.stencilMask( 0xFFFFFFFF );
        gl.stencilOp( RenderingContext.KEEP, RenderingContext.KEEP, RenderingContext.KEEP );
        gl.viewport( 0, 0, gl.canvas.width, gl.canvas.height );
        //gl.clear( RenderingContext.COLOR_BUFFER_BIT | RenderingContext.DEPTH_BUFFER_BIT | RenderingContext.STENCIL_BUFFER_BIT );
        return gl;
    }