From f1ebb21bcbf9861d19c1dcb9e38f37503b1d22ee Mon Sep 17 00:00:00 2001
From: Brooke Vibber <bvibber@pobox.com>
Date: Tue, 31 Dec 2024 17:49:13 -0800
Subject: [PATCH 1/2] wip not working wide pixels

---
 mandel.s | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/mandel.s b/mandel.s
index 9546b68..f777cbc 100644
--- a/mandel.s
+++ b/mandel.s
@@ -234,9 +234,9 @@ display_list_len = display_list_end - display_list_start
 color_map:
     .byte 0
     .repeat 85
-        .byte 1
-        .byte 2
-        .byte 3
+        .byte %01010101
+        .byte %10101010
+        .byte %11111111
     .endrepeat
 
 
@@ -285,6 +285,11 @@ fill_masks:
     .byte %00000001
     .byte %00000000
 
+pixel_masks:
+    .byte $ff
+    .byte $0f
+    .byte $03
+
 viewport_zoom:
     .byte 1
     .byte 6
@@ -1130,8 +1135,11 @@ enough:
     ; iter -> color
     ldx iter
     lda color_map,x
+    ldx fill_level
+    and pixel_masks,x
     sta pixel_color
-    lda #(255 - 3)
+    lda pixel_masks,x
+    eor #$ff
     sta pixel_mask
 
     ; sy -> line base address in temp

From 49fe3155294c0e392904a85154bf7dbe9d2e7808 Mon Sep 17 00:00:00 2001
From: Brooke Vibber <bvibber@pobox.com>
Date: Tue, 31 Dec 2024 20:13:11 -0800
Subject: [PATCH 2/2] 'wide pixels'

should get better color on the composite video because the
scanlines will be fuller of data
---
 mandel.s | 17 +++++++----------
 todo.md  |  3 +--
 2 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/mandel.s b/mandel.s
index f777cbc..472f613 100644
--- a/mandel.s
+++ b/mandel.s
@@ -286,9 +286,9 @@ fill_masks:
     .byte %00000000
 
 pixel_masks:
-    .byte $ff
-    .byte $0f
-    .byte $03
+    .byte %11111111
+    .byte %11110000
+    .byte %11000000
 
 viewport_zoom:
     .byte 1
@@ -1188,18 +1188,15 @@ point:
     ; pixel_mask <<= pixel_shift (shifting in ones)
     and #3
     sta pixel_shift
-    lda #3
-    sec
-    sbc pixel_shift
     tax
 shift_loop:
     beq shift_done
-    asl pixel_color
-    asl pixel_color
+    lsr pixel_color
+    lsr pixel_color
     sec
-    rol pixel_mask
+    ror pixel_mask
     sec
-    rol pixel_mask
+    ror pixel_mask
     dex
     jmp shift_loop
 shift_done:
diff --git a/todo.md b/todo.md
index 284d653..e8cffe3 100644
--- a/todo.md
+++ b/todo.md
@@ -11,8 +11,7 @@ things to try:
 
 * y-axis mirror optimization
 
-* 'wide pixels' 2x and 4x for a fuller initial image in the tiered rendering
-  * maybe redo tiering to just 4x4, 2x2, 1x1?
+* try filling in the extra scanlines on 4x4 and 2x2 tiering
 
 * extract viewport for display & re-input via keyboard