libimg: fix transparency in indexed png images.

git-svn-id: svn://kolibrios.org@8399 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-12-13 21:26:28 +00:00 · 2020-12-13 21:26:28 +00:00 · eb01893ff6
commit eb01893ff6
parent e001af7afe
1 changed files with 3 additions and 2 deletions
--- a/programs/develop/libraries/libs-dev/libimg/png/png.asm
+++ b/programs/develop/libraries/libs-dev/libimg/png/png.asm
@ -280,7 +280,8 @@ end virtual
 	lodsd
 	dec	esi
 	bswap	eax
-	shr	eax, 8
+	mov     al, 0xff
+	ror	eax, 8
 	stosd
 	jmp	@b
@@:
@ -1142,4 +1143,4 @@ endl
 	xor	eax,eax
 .quit:
 	ret
-endp
+endp