92 lines
3.2 KiB
Go
92 lines
3.2 KiB
Go
package thumb
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var (
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SizePrecached = 2048
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SizeUncached = 7680
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Filter = ResampleLanczos
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)
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func MaxSize() int {
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if SizePrecached > SizeUncached {
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return SizePrecached
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}
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return SizeUncached
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}
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func InvalidSize(size int) bool {
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return size < 0 || size > MaxSize()
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}
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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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Use string `json:"use"`
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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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Options []ResampleOption `json:"-"`
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}
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type SizeMap map[Name]Size
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// Sizes contains the properties of all thumbnail sizes.
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var Sizes = SizeMap{
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Tile50: {Tile50, Tile500, "Lists", 50, 50, false, []ResampleOption{ResampleFillCenter, ResampleDefault}},
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Tile100: {Tile100, Tile500, "Maps", 100, 100, false, []ResampleOption{ResampleFillCenter, ResampleDefault}},
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Tile224: {Tile224, Tile500, "TensorFlow, Mosaic", 224, 224, false, []ResampleOption{ResampleFillCenter, ResampleDefault}},
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Tile500: {Tile500, "", "Tiles", 500, 500, false, []ResampleOption{ResampleFillCenter, ResampleDefault}},
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Colors: {Colors, Fit720, "Color Detection", 3, 3, false, []ResampleOption{ResampleResize, ResampleNearestNeighbor, ResamplePng}},
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Left224: {Left224, Fit720, "TensorFlow", 224, 224, false, []ResampleOption{ResampleFillTopLeft, ResampleDefault}},
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Right224: {Right224, Fit720, "TensorFlow", 224, 224, false, []ResampleOption{ResampleFillBottomRight, ResampleDefault}},
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Fit720: {Fit720, "", "Mobile, TV", 720, 720, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit1280: {Fit1280, Fit2048, "Mobile, HD Ready TV", 1280, 1024, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit1920: {Fit1920, Fit2048, "Mobile, Full HD TV", 1920, 1200, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit2048: {Fit2048, "", "Tablets, Cinema 2K", 2048, 2048, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit2560: {Fit2560, "", "Quad HD, Retina Display", 2560, 1600, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit3840: {Fit3840, "", "Ultra HD", 3840, 2400, false, []ResampleOption{ResampleFit, ResampleDefault}}, // Deprecated in favor of fit_4096
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Fit4096: {Fit4096, "", "Ultra HD, Retina 4K", 4096, 4096, true, []ResampleOption{ResampleFit, ResampleDefault}},
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Fit7680: {Fit7680, "", "8K Ultra HD 2, Retina 6K", 7680, 4320, true, []ResampleOption{ResampleFit, ResampleDefault}},
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}
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// DefaultSizes contains all default size names.
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var DefaultSizes = []Name{
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Fit7680,
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Fit4096,
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Fit2560,
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Fit2048,
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Fit1920,
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Fit1280,
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Fit720,
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Right224,
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Left224,
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Colors,
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Tile500,
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Tile224,
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Tile100,
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Tile50,
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}
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// Find returns the largest default thumbnail type for the given size limit.
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func Find(limit int) (name Name, size Size) {
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for _, name = range DefaultSizes {
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t := Sizes[name]
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if t.Width <= limit && t.Height <= limit {
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return name, t
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}
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}
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return "", Size{}
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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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