// Create a new blob object from an existing size
func (im *Image) MakeSize(sizing *imgry.Sizing) (*Image, error) {
defer metrics.MeasureSince([]string{"fn.image.MakeSize"}, time.Now())
if err := im.ValidateKey(); err != nil {
return nil, err
}
im2 := &Image{
Key: im.Key,
Data: im.Data,
SrcUrl: im.SrcUrl,
Sizing: sizing,
SizingQuery: sizing.ToQuery().Encode(),
}
// Clone the originating image
var err error
if err = im2.LoadImage(); err != nil {
return nil, err
}
// Resize the new image object
if err = im2.SizeIt(sizing); err != nil {
return nil, err
}
return im2, nil
}
func (i *Image) sizeFrames(sz *imgry.Sizing) error {
// Shortcut if there is nothing to size
if sz.Size.Equal(imgry.ZeroRect) && sz.CropBox.Equal(imgry.ZeroFloatingRect) {
return nil
}
// TODO: instead of Coalesce, better to change the offsets.
// This is required for animated image resizing
if !sz.Flatten && i.mw.GetNumberImages() > 1 {
i.mw = i.mw.CoalesceImages()
}
i.mw.SetFirstIterator()
for n := true; n; n = i.mw.NextImage() {
pw, ph := int(i.mw.GetImageWidth()), int(i.mw.GetImageHeight())
srcSize := imgry.NewRect(pw, ph)
// Initial crop of the source image
cropBox, cropOrigin, err := sz.CalcCropBox(srcSize)
if err != nil {
return err
}
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
srcSize = cropBox
i.mw.ResetImagePage("")
}
// Resize the image
resizeRect, cropBox, cropOrigin := sz.CalcResizeRect(srcSize)
if resizeRect != nil && !resizeRect.Equal(imgry.ZeroRect) {
err := i.mw.ResizeImage(uint(resizeRect.Width), uint(resizeRect.Height), imagick.FILTER_LANCZOS, 1.0)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
// Perform any final crops from an operation
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
if sz.Flatten {
break
}
}
return nil
}
func (b *Bucket) DbIndexKey(imageKey string, optSizing ...*imgry.Sizing) string {
var sizing *imgry.Sizing
if len(optSizing) > 0 { // sizing is optional
sizing = optSizing[0]
}
key := fmt.Sprintf("%s/%s", b.ID, imageKey)
if sizing != nil {
key = fmt.Sprintf("%s:q/%s", key, sha1Hash(sizing.ToQuery().Encode()))
}
return key
}
func (b *Bucket) GetImageSize(key string, sizing *imgry.Sizing) (*Image, error) {
m := metrics.GetOrRegisterTimer("fn.bucket.GetImageSize", nil)
defer m.UpdateSince(time.Now())
// Find the original image
origIm, err := b.DbFindImage(key, nil)
if err != nil {
return nil, err
}
// Calculate the sizing ahead of time so our query is updated
// and we can find it in our db
sizing.CalcResizeRect(&imgry.Rect{origIm.Width, origIm.Height})
sizing.Size.Width = sizing.GranularizedWidth()
sizing.Size.Height = sizing.GranularizedHeight()
// Find the specific size
im, err := b.DbFindImage(key, sizing)
if err != nil && err != ErrImageNotFound {
return nil, err
}
if im != nil { // Got it!
return im, nil
}
// Build a new size from the original
im2, err := origIm.MakeSize(sizing)
defer im2.Release()
if err != nil {
return nil, err
}
err = b.DbSaveImage(im2, sizing)
return im2, err
}
func (i *Image) sizeFrames(sz *imgry.Sizing) error {
var canvas *imagick.MagickWand
var bg *imagick.PixelWand
// Shortcut if there is nothing to size
if sz.Size.Equal(imgry.ZeroRect) && sz.CropBox.Equal(imgry.ZeroFloatingRect) {
return nil
}
coalesceAndDeconstruct := !sz.Flatten && i.mw.GetNumberImages() > 1
if coalesceAndDeconstruct {
i.mw = i.mw.CoalesceImages()
}
if sz.Canvas != nil {
// If the user requested a canvas.
canvas = imagick.NewMagickWand()
bg = imagick.NewPixelWand()
bg.SetColor("transparent")
defer func() {
bg.Destroy()
if canvas != nil && canvas != i.mw {
canvas.Destroy()
}
}()
}
i.mw.SetFirstIterator()
for n := true; n; n = i.mw.NextImage() {
pw, ph := int(i.mw.GetImageWidth()), int(i.mw.GetImageHeight())
srcSize := imgry.NewRect(pw, ph)
// Initial crop of the source image
cropBox, cropOrigin, err := sz.CalcCropBox(srcSize)
if err != nil {
return err
}
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
srcSize = cropBox
i.mw.ResetImagePage("")
}
// Resize the image
resizeRect, cropBox, cropOrigin := sz.CalcResizeRect(srcSize)
if resizeRect != nil && !resizeRect.Equal(imgry.ZeroRect) {
err := i.mw.ResizeImage(uint(resizeRect.Width), uint(resizeRect.Height), imagick.FILTER_LANCZOS, 1.0)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
// Perform any final crops from an operation
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
// If we have a canvas we put the image at its center.
if canvas != nil {
canvas.NewImage(uint(sz.Canvas.Width), uint(sz.Canvas.Height), bg)
canvas.SetImageBackgroundColor(bg)
canvas.SetImageFormat(i.mw.GetImageFormat())
x := (sz.Canvas.Width - int(i.mw.GetImageWidth())) / 2
y := (sz.Canvas.Height - int(i.mw.GetImageHeight())) / 2
canvas.CompositeImage(i.mw, imagick.COMPOSITE_OP_OVER, x, y)
canvas.ResetImagePage("")
}
if sz.Flatten {
break
}
}
if canvas != nil {
i.mw.Destroy()
i.mw = canvas
}
if coalesceAndDeconstruct {
// Compares each frame of the image, removes pixels that are already on the
// background and updates offsets accordingly.
i.mw = i.mw.DeconstructImages()
}
return nil
}