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Clean up home/copy2.asm (#531)

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* Use `SCREEN_WIDTH`, rename loop, and remove obsolete comment in `ClearScreenArea`

* Use `SCREEN_HEIGHT` and `lb` in `CopyScreenTileBufferToVRAM`

* Use `SCREEN_AREA` in `ClearScreen`
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PokefanMarcel 2025-09-10 21:48:30 +02:00 committed by GitHub
parent 108bf2981d
commit 59da8c8122
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1 changed files with 11 additions and 11 deletions
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home/copy2.asm
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@ -161,39 +161,39 @@ CopyVideoDataDouble::
ClearScreenArea::
; Clear tilemap area cxb at hl.
ld a, " " ; blank tile
ld de, 20 ; screen width
.y
ld a, " "
ld de, SCREEN_WIDTH
.loopRows
push hl
push bc
.x
.loopTiles
ld [hli], a
dec c
jr nz, .x
jr nz, .loopTiles
pop bc
pop hl
add hl, de
dec b
jr nz, .y
jr nz, .loopRows
ret
CopyScreenTileBufferToVRAM::
; Copy wTileMap to the BG Map starting at b * $100.
; This is done in thirds of 6 rows, so it takes 3 frames.
ld c, 6
ld c, SCREEN_HEIGHT / 3
ld hl, $600 * 0
lb hl, 0, 0
decoord 0, 6 * 0
call .setup
call DelayFrame
ld hl, $600 * 1
lb hl, SCREEN_HEIGHT / 3, 0
decoord 0, 6 * 1
call .setup
call DelayFrame
ld hl, $600 * 2
lb hl, 2 * SCREEN_HEIGHT / 3, 0
decoord 0, 6 * 2
call .setup
jp DelayFrame
@ -215,7 +215,7 @@ CopyScreenTileBufferToVRAM::
ClearScreen::
; Clear wTileMap, then wait
; for the bg map to update.
ld bc, 20 * 18
ld bc, SCREEN_AREA
inc b
hlcoord 0, 0
ld a, " "