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Add Bounds method to ImageTiles

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This commit is contained in:
David Vogel 2023-12-23 01:11:58 +01:00
parent cbdd925c30
commit 3016919348
1 changed files with 16 additions and 1 deletions
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17
bin/stitch/image-tiles.go
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@ -1,4 +1,4 @@
// Copyright (c) 2019-2022 David Vogel
// Copyright (c) 2019-2023 David Vogel
//
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT
@ -7,6 +7,7 @@ package main
import (
"fmt"
"image"
"path/filepath"
)
@ -37,6 +38,20 @@ func LoadImageTiles(path string, scaleDivider int) (ImageTiles, error) {
return imageTiles, nil
}
// InvalidateAboveY invalidates all cached images that have no pixel at the given y coordinate or below.
func (it ImageTiles) Bounds() image.Rectangle {
totalBounds := image.Rectangle{}
for i, tile := range it {
if i == 0 {
totalBounds = tile.Bounds()
} else {
totalBounds = totalBounds.Union(tile.Bounds())
}
}
return totalBounds
}
// InvalidateAboveY invalidates all cached images that have no pixel at the given y coordinate or below.
func (it ImageTiles) InvalidateAboveY(y int) {
for i := range it {