From adef2c0f56c4a0cbcc4814a8ee4ce9322d0f8aee Mon Sep 17 00:00:00 2001
From: hugova <hugova@kth.se>
Date: Thu, 3 Apr 2025 00:21:01 +0200
Subject: [PATCH] Make line draw faster

---
 wip-hugo/routines/line/line_down.s | 10 +++++++---
 wip-hugo/source.s                  |  4 ++--
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/wip-hugo/routines/line/line_down.s b/wip-hugo/routines/line/line_down.s
index 0484956..afed9d4 100644
--- a/wip-hugo/routines/line/line_down.s
+++ b/wip-hugo/routines/line/line_down.s
@@ -64,7 +64,12 @@ selfmod:
         STA case_1 +7
 end_selfmod:
         JSR pixel_draw ;;only used first pixel. after this relative position is abused
-        LDX X_pos
+        ;; X = X_end - X_pos
+        LDA X_end
+        SEC
+        SBC X_pos
+        TAX
+        ;LDX X_pos
         LDY #$00
 for_x:
         ;; Paints A to address in |btp_mem_pos* + Y|
@@ -84,8 +89,7 @@ move_8px_left:
         LDA #%10000000
         STA byte_to_paint
 increment_pixel_x_end:
-        INX
-        CPX X_end
+        DEX
         BEQ end ;We keep track on when to stop line draw with the X registry.
         ;;If D <  %00000010 00000000:  case_2
         ;;else case 1.
diff --git a/wip-hugo/source.s b/wip-hugo/source.s
index 324ebf3..8650072 100755
--- a/wip-hugo/source.s
+++ b/wip-hugo/source.s
@@ -6,8 +6,8 @@
 .include "routines/memory/mem.inc"
 ;;Code to run
 .include "STARTUP.s"
-;.include "routines/line/line_test_time.s"
-.include "routines/memory/memcpy_test.s"
+.include "routines/line/line_test_time.s"
+;.include "routines/memory/memcpy_test.s"
 exit:
 jmp exit
 .include "routines/line/line.s"