From 017a337180870bc16ff5d287a132b8cb0784008d Mon Sep 17 00:00:00 2001
From: hugova <hugova@kth.se>
Date: Sun, 11 May 2025 20:00:48 +0200
Subject: [PATCH] make pixel drawing faster using lookup table

---
 wip-hugo/routines/memory/mem.inc     |  2 +-
 wip-hugo/routines/pixel/pixel_draw.s | 13 +++----------
 wip-hugo/source.s                    |  1 +
 3 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/wip-hugo/routines/memory/mem.inc b/wip-hugo/routines/memory/mem.inc
index 60777b9..6d7e188 100644
--- a/wip-hugo/routines/memory/mem.inc
+++ b/wip-hugo/routines/memory/mem.inc
@@ -1,6 +1,6 @@
 ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
 
-        ;;Public args
+        ;; public args
         A_start = $D0      ; 16-bit value (uses D1)
         B_start = $D2      ; 16-bit value (uses D3)
         B_end = $D4        ; 16-bit value (uses D5)
diff --git a/wip-hugo/routines/pixel/pixel_draw.s b/wip-hugo/routines/pixel/pixel_draw.s
index 8893e10..c79ddc3 100755
--- a/wip-hugo/routines/pixel/pixel_draw.s
+++ b/wip-hugo/routines/pixel/pixel_draw.s
@@ -11,16 +11,9 @@
 	AND #%00000111
 	TAX
 
-	;;Store pixel in byte_to_paint
-	LDA #%10000000
-	INX
-@shift_btp: ;; check out SMB instruction here! //Hugo
-	DEX
-	BEQ end__;X=0 end this
-	CLC
-	ROR A
-	jmp @shift_btp
-end__:
+	# this is the same as: A = 2^X
+	LDA binary_factor, X
+
 	STA byte_to_paint
 
 	;;FIND THE POSITION IN MEMORY TO WRITE PIXEL
diff --git a/wip-hugo/source.s b/wip-hugo/source.s
index 8da786c..a349a18 100755
--- a/wip-hugo/source.s
+++ b/wip-hugo/source.s
@@ -18,3 +18,4 @@ JMP exit
 .include "routines/pixel/pixel_draw.s"
 .include "routines/memory/memset.s"
 .include "routines/memory/memcpy.s"
+.include "END.s"