mirror of
https://github.com/Dadido3/noita-mapcap.git
synced 2024-11-22 21:17:33 +00:00
62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
// Copyright (c) 2019 David Vogel
|
|
//
|
|
// This software is released under the MIT License.
|
|
// https://opensource.org/licenses/MIT
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
_ "image/png"
|
|
"os"
|
|
)
|
|
|
|
type imageTile struct {
|
|
fileName string
|
|
|
|
offset image.Point // Correction offset of the image, so that it aligns pixel perfect with other images. Determined by image matching.
|
|
image image.Image // Either a rectangle or an RGBA image. The bounds of this image are determined by the filename.
|
|
}
|
|
|
|
func (it *imageTile) loadImage() error {
|
|
// Check if the image is already loaded
|
|
if _, ok := it.image.(*image.RGBA); ok {
|
|
return nil
|
|
}
|
|
|
|
// Store rectangle of the old image
|
|
oldRect := it.image.Bounds()
|
|
|
|
file, err := os.Open(it.fileName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer file.Close()
|
|
|
|
img, _, err := image.Decode(file)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
imgRGBA, ok := img.(*image.RGBA)
|
|
if !ok {
|
|
return fmt.Errorf("Expected an RGBA image, got %T instead", img)
|
|
}
|
|
|
|
// Restore the position of the image rectangle
|
|
imgRGBA.Rect = imgRGBA.Rect.Add(oldRect.Min)
|
|
|
|
it.image = imgRGBA
|
|
|
|
return nil
|
|
}
|
|
|
|
func (it *imageTile) unloadImage() {
|
|
it.image = it.image.Bounds()
|
|
}
|
|
|
|
func (it *imageTile) String() string {
|
|
return fmt.Sprintf("<ImageTile \"%v\">", it.fileName)
|
|
}
|