From 54fa061342a058f20acc5b593eaf33b0368c7ebc Mon Sep 17 00:00:00 2001
From: hugova <hugova@kth.se>
Date: Thu, 17 Jul 2025 13:47:12 +0200
Subject: [PATCH] fix line draw bug, that snaps the end to exry 8th pixel

---
 wip-hugo/routines/line/line_down.s           | 1 -
 wip-hugo/routines/line/line_down_inv.s       | 1 -
 wip-hugo/routines/line/line_test_extensive.s | 4 ++--
 wip-hugo/routines/line/line_up.s             | 3 ++-
 wip-hugo/routines/line/line_up_inv.s         | 2 +-
 5 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/wip-hugo/routines/line/line_down.s b/wip-hugo/routines/line/line_down.s
index 87361c1..b0cf736 100644
--- a/wip-hugo/routines/line/line_down.s
+++ b/wip-hugo/routines/line/line_down.s
@@ -77,7 +77,6 @@ end_selfmod:
         STA byte_to_paint
         ;; X = X_end - X_pos
         LDX dx
-        LDY #$00
 for_x:
         ;; Paints A to address in |btp_mem_pos* + Y|
         ;; Y is pixel position in the chunk. Therefor it may be that Y = 0, 1, 2, 3, 4, ,5 ,6 ,7.
diff --git a/wip-hugo/routines/line/line_down_inv.s b/wip-hugo/routines/line/line_down_inv.s
index 84f723d..d026525 100644
--- a/wip-hugo/routines/line/line_down_inv.s
+++ b/wip-hugo/routines/line/line_down_inv.s
@@ -51,7 +51,6 @@ selfmod:
 end_selfmod:
         JSR pixel_calc ;;only used first pixel. after this relative position is abused
         STA byte_to_paint
-        LDY #$00
         LDX dy
 for_y:
         LDA byte_to_paint
diff --git a/wip-hugo/routines/line/line_test_extensive.s b/wip-hugo/routines/line/line_test_extensive.s
index df16080..7788aaf 100644
--- a/wip-hugo/routines/line/line_test_extensive.s
+++ b/wip-hugo/routines/line/line_test_extensive.s
@@ -68,11 +68,11 @@ clear_screen_:
 long_line_test_b:
 LDA #$00
 STA X_pos_
-LDA #$60
+LDA #$00
 STA Y_pos_
 LDA #$ff
 STA X_end
-LDA #$0
+LDA #$60
 STA Y_end
 @loop:
 LDA Y_pos_
diff --git a/wip-hugo/routines/line/line_up.s b/wip-hugo/routines/line/line_up.s
index 7952917..4e97bf6 100644
--- a/wip-hugo/routines/line/line_up.s
+++ b/wip-hugo/routines/line/line_up.s
@@ -54,7 +54,8 @@ end_selfmod:
         JSR pixel_calc ;;only used first pixel. after this relative position is abused
         STA byte_to_paint
         Sub_16 btp_mem_pos, btp_mem_pos + 1, #$01, #$00 ;; Y has always a offset of at least 1
-        LDY #$01
+        ;LDY #$01
+        INY
         LDX dx
 for_x:
         LDA byte_to_paint
diff --git a/wip-hugo/routines/line/line_up_inv.s b/wip-hugo/routines/line/line_up_inv.s
index fe08ed6..63e1a84 100644
--- a/wip-hugo/routines/line/line_up_inv.s
+++ b/wip-hugo/routines/line/line_up_inv.s
@@ -52,7 +52,7 @@ selfmod:
 end_selfmod:
         JSR pixel_calc ;;only used first pixel. after this relative position is abused
         STA byte_to_paint
-        LDY #$00
+        ;LDY #$00
         LDX dy
 for_y:
         LDA byte_to_paint