// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package jpeg

import (
	"image"
)

// makeImg allocates and initializes the destination image.
func (d *decoder) makeImg(mxx, myy int) {
	if d.nComp == 1 {
		m := image.NewGray(image.Rect(0, 0, 8*mxx, 8*myy))
		d.img1 = m.SubImage(image.Rect(0, 0, d.width, d.height)).(*image.Gray)
		return
	}

	// value chosen for being power of two, and enough to handle all web APIs
	// in particular, note that WebGL2's texImage2D takes up to 10 arguments
	const maxStackArgs = 16
	if size <= maxStackArgs {
		// as long as makeArgs is inlined, these will be stack-allocated
		argVals = make([]Value, size, maxStackArgs)
		argRefs = make([]ref, size, maxStackArgs)
	} else {
		// allocates on the heap, but exceeding maxStackArgs should be rare

			return true
		}
	}
	return false
}

func openBrowser(url string, o *plugin.Options) {
	// Construct URL.
	baseURL, _ := gourl.Parse(url)
	current := currentConfig()
	u, _ := current.makeURL(*baseURL)

	// Give server a little time to get ready.
	time.Sleep(time.Millisecond * 500)

	for _, b := range browsers() {
		args := strings.Split(b, " ")
		if len(args) == 0 {
			continue
		}

	// TODO: add preferred region to -u-rg-.
	if e := w.Extensions(); len(e) > 0 {
		b := language.Builder{}
		b.SetTag(tt)
		for _, e := range e {
			b.AddExt(e)
		}
		tt = b.Make()
	}
	return makeTag(tt), index, c
}

// ErrMissingLikelyTagsData indicates no information was available
// to compute likely values of missing tags.
var ErrMissingLikelyTagsData = errors.New("missing likely tags data")