State sizes now calculated on game load. Thumbnail only displayed if in the ZST.

zsnes/src/video/procvid.asm

@@ -67,6 +67,8 @@ EXTSYM vidbufferofsb
 ;EXTSYM Super2xSaI
 EXTSYM HalfTransB,HalfTransC
 
+EXTSYM cur_zst_size,old_zst_size
+
 %ifdef __MSDOS__
 EXTSYM SB_blank
 %endif
@@ -1306,18 +1308,18 @@ GetPicture:
     call File_Seek_End
     shl edx,16
     mov dx,ax
-    ;Just draw! - If you want to make it exact, you set all the sizes
-    ;cmp edx,266879+64*56*2
-    ;je .draw
-    ;cmp edx,398643+64*56*2
-    ;je .draw
-    ;cmp edx,400692+64*56*2
-    ;je .draw
-    ;cmp edx,275071+64*56*2
-    ;je .draw
-    ;jmp .nodraw
-;.draw
-    sub edx,64*56*2
+    push eax
+    sub edx,64*56*2 ;Size of thumbnail
+    mov eax,[cur_zst_size]
+    cmp edx,eax
+    je .draw
+    mov eax,[old_zst_size]
+    cmp edx,eax
+    je .draw
+    pop eax
+    jmp .nodraw
+.draw
+    pop eax
     mov ax,dx
     shr edx,16
     mov cx,dx