Function reglRenderbuffer

lib/renderbuffer.js:108–179

(a, b)

    stats.renderbufferCount++

    function reglRenderbuffer (a, b) {
      var w = 0
      var h = 0
      var format = GL_RGBA4

      if (typeof a === 'object' && a) {
        var options = a
        if ('shape' in options) {
          var shape = options.shape
          check(Array.isArray(shape) && shape.length >= 2,
            'invalid renderbuffer shape')
          w = shape[0] | 0
          h = shape[1] | 0
        } else {
          if ('radius' in options) {
            w = h = options.radius | 0
          }
          if ('width' in options) {
            w = options.width | 0
          }
          if ('height' in options) {
            h = options.height | 0
          }
        }
        if ('format' in options) {
          check.parameter(options.format, formatTypes,
            'invalid renderbuffer format')
          format = formatTypes[options.format]
        }
      } else if (typeof a === 'number') {
        w = a | 0
        if (typeof b === 'number') {
          h = b | 0
        } else {
          h = w
        }
      } else if (!a) {
        w = h = 1
      } else {
        check.raise('invalid arguments to renderbuffer constructor')
      }

      // check shape
      check(
        w > 0 && h > 0 &&
        w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,
        'invalid renderbuffer size')

      if (w === renderbuffer.width &&
          h === renderbuffer.height &&
          format === renderbuffer.format) {
        return
      }

      reglRenderbuffer.width = renderbuffer.width = w
      reglRenderbuffer.height = renderbuffer.height = h
      renderbuffer.format = format