Match aspect lookup against resource name not pointer

Also update to check file path before image pointer

internal/painter/image.go

@@ -64,7 +64,7 @@ func PaintImage(img *canvas.Image, c fyne.Canvas, width, height int) image.Image
 
 				icon.SetTarget(0, 0, float64(texW), float64(texH))
 				// this is used by our render code, so let's set it to the file aspect
-				aspects[img.Resource] = aspect
+				aspects[name] = aspect
 				// if the image specifies it should be original size we need at least that many pixels on screen
 				if img.FillMode == canvas.ImageFillOriginal {
 					if !checkImageMinSize(img, c, origW, origH) {
@@ -97,7 +97,7 @@ func PaintImage(img *canvas.Image, c fyne.Canvas, width, height int) image.Image
 		}
 		origSize := pixels.Bounds().Size()
 		// this is used by our render code, so let's set it to the file aspect
-		aspects[img] = float32(origSize.X) / float32(origSize.Y)
+		aspects[name] = float32(origSize.X) / float32(origSize.Y)
 		// if the image specifies it should be original size we need at least that many pixels on screen
 		if img.FillMode == canvas.ImageFillOriginal {
 			if !checkImageMinSize(img, c, origSize.X, origSize.Y) {

internal/painter/svg_cache.go

@@ -32,7 +32,13 @@ func init() {
 
 // GetAspect looks up an aspect ratio of an image
 func GetAspect(img *canvas.Image) float32 {
-	aspect := aspects[img.Resource]
+	aspect := float32(0.0)
+	if img.Resource != nil {
+		aspect = aspects[img.Resource.Name()]
+	} else if img.File != "" {
+		aspect = aspects[img.File]
+	}
+
 	if aspect == 0 {
 		aspect = aspects[img]
 	}

theme/icons.go

@@ -42,7 +42,7 @@ func (res *ThemedResource) Content() []byte {
 	return colorizeResource(res.source, clr)
 }
 
-// Error resturns a different resource for indicating an error.
+// Error returns a different resource for indicating an error.
 func (res *ThemedResource) Error() *ErrorThemedResource {
 	return NewErrorThemedResource(res)
 }