gh-108: Make image.INVERT preserve alpha.

python-processing-unit · python-processing-unit · commit c7a029144215 · 2026-03-21T23:50:35.000-04:00
diff --git a/lib/std/image/init.pre b/lib/std/image/init.pre
@@ -80,7 +80,9 @@ FUNC TNS: FLIP_H(TNS: img){
 }
 
 FUNC TNS: INVERT(TNS: img){
-    RETURN(MSUB(TNS(SHAPE(img), 0xFF), img))
+    TNS: return = MSUB(TNS(SHAPE(img), 0xFF), img)
+    return[*, *, 0d4] = img[*, *, 0d4] ! Preserve alpha
+    POP(return)
 }
 
 FUNC TNS: RECT(TNS: img, INT: x, INT: y, INT: width, INT: height, TNS: color, INT: fill, INT: thickness){

Original file line number	Diff line number	Diff line change
`@@ -80,7 +80,9 @@ FUNC TNS: FLIP_H(TNS: img){`
`80`	`80`	`}`
`81`	`81`
`82`	`82`	`FUNC TNS: INVERT(TNS: img){`
`83`		`- RETURN(MSUB(TNS(SHAPE(img), 0xFF), img))`
	`83`	`+ TNS: return = MSUB(TNS(SHAPE(img), 0xFF), img)`
	`84`	`+ return[, , 0d4] = img[, , 0d4] ! Preserve alpha`
	`85`	`+ POP(return)`
`84`	`86`	`}`
`85`	`87`
`86`	`88`	`FUNC TNS: RECT(TNS: img, INT: x, INT: y, INT: width, INT: height, TNS: color, INT: fill, INT: thickness){`