62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package level
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import (
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"bytes"
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"image"
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"image/png"
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"git.kirsle.net/SketchyMaze/doodle/pkg/balance"
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"git.kirsle.net/go/ui"
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)
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// Helper functions to get a level's embedded screenshot PNGs as textures.
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// HasScreenshot returns whether screenshots exist for the level.
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func (lvl *Level) HasScreenshot() bool {
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var filenames = []string{
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balance.LevelScreenshotLargeFilename,
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balance.LevelScreenshotMediumFilename,
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balance.LevelScreenshotSmallFilename,
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}
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for _, filename := range filenames {
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if lvl.Files.Exists("assets/screenshots/" + filename) {
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return true
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}
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}
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return false
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}
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// GetScreenshotImage returns a screenshot from the level's data as a Go Image.
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// The filename is like "large.png" or "medium.png" and is appended to "assets/screenshots"
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func (lvl *Level) GetScreenshotImage(filename string) (image.Image, error) {
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data, err := lvl.Files.Get("assets/screenshots/" + filename)
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if err != nil {
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return nil, err
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}
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return png.Decode(bytes.NewBuffer(data))
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}
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// GetScreenshotImageAsUIImage returns a ui.Image texture of a screenshot.
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func (lvl *Level) GetScreenshotImageAsUIImage(filename string) (*ui.Image, error) {
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// Have it cached recently?
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if lvl.cacheImages == nil {
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lvl.cacheImages = map[string]*ui.Image{}
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} else if img, ok := lvl.cacheImages[filename]; ok {
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return img, nil
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}
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img, err := lvl.GetScreenshotImage(filename)
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if err != nil {
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return nil, err
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}
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result, err := ui.ImageFromImage(img)
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if err != nil {
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return nil, err
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}
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lvl.cacheImages[filename] = result
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return result, nil
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}
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