68 lines
2.4 KiB
Go
68 lines
2.4 KiB
Go
package thumb
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import (
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"image"
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)
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// Size represents a standard media resolution.
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type Size struct {
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Name Name `json:"name"`
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Source Name `json:"-"`
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Usage string `json:"usage"`
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Width int `json:"w"`
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Height int `json:"h"`
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Public bool `json:"-"`
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Fit bool `json:"-"`
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Options []ResampleOption `json:"-"`
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}
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// Bounds returns the thumb size as image.Rectangle.
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func (s Size) Bounds() image.Rectangle {
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return image.Rectangle{Min: image.Point{}, Max: image.Point{X: s.Width, Y: s.Height}}
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}
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// Uncached tests if thumbnail type exceeds the cached thumbnails size limit.
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func (s Size) Uncached() bool {
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return s.Width > SizePrecached || s.Height > SizePrecached
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}
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// ExceedsLimit tests if thumbnail type is too large, and can not be rendered at all.
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func (s Size) ExceedsLimit() bool {
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return s.Width > MaxSize() || s.Height > MaxSize()
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}
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// FromCache returns the filename if a thumbnail image with the matching size is in the cache.
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func (s Size) FromCache(fileName, fileHash, cachePath string) (string, error) {
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return FromCache(fileName, fileHash, cachePath, s.Width, s.Height, s.Options...)
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}
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// FromFile creates a new thumbnail with the matching size if it was not found in the cache, and returns the filename.
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func (s Size) FromFile(fileName, fileHash, cachePath string, fileOrientation int) (string, error) {
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return FromFile(fileName, fileHash, cachePath, s.Width, s.Height, fileOrientation, s.Options...)
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}
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// Create creates a thumbnail with the matching size and returns it as image.Image.
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func (s Size) Create(img image.Image, fileName string) (image.Image, error) {
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return Create(img, fileName, s.Width, s.Height, s.Options...)
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}
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// FileName returns the file name of the thumbnail for the matching size.
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func (s Size) FileName(hash, thumbPath string) (string, error) {
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return FileName(hash, thumbPath, s.Width, s.Height, s.Options...)
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}
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// ResolvedName returns the file name of the thumbnail for the matching size with all symlinks resolved.
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func (s Size) ResolvedName(hash, thumbPath string) (string, error) {
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return ResolvedName(hash, thumbPath, s.Width, s.Height, s.Options...)
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}
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// Skip checks if the thumbnail size is too large for the image and can be skipped.
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func (s Size) Skip(img image.Image) bool {
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if !s.Fit || !img.Bounds().In(s.Bounds()) {
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return false
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} else if newSize := FitBounds(img.Bounds()); newSize.Width < s.Width {
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return true
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}
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return false
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}
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