From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 30 Oct 2025 10:22:55 +0000 (+0100)
Subject: map: Added tile draw routine
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=6738d2530ab908eac4e621ff04d681e843bc1747;p=gbrg%2F.git

map: Added tile draw routine
---

diff --git a/src/map.s b/src/map.s
index 4e41567..831d41f 100644
--- a/src/map.s
+++ b/src/map.s
@@ -23,12 +23,13 @@ map_load:
 	push de
 	call map_tiles_load
 	pop de
+	
+	call map_full_draw
 
 	call lcd_on
 	call vblank_wait
 	call enableinterrupts
 
-	call map_full_draw
 	call player_init
 	call ui_init
 
@@ -158,11 +159,62 @@ map_tile_banks_load:
 #endmacro
 	
 	
+	; draws a tile 
+	; to the screen
+	; inputs:
+	;		hl: tile 
+	;   b/c: y/x position
+map_draw_tile:
+	; find tile to draw
+	ld de, t_tile
+	add hl, de
+	
+	; load tile into a
+	ld a, [hl] ; a = tile
+	push af ; save tile gfx
+
+	ld hl, SCRN0
+	ld de, MAP_W 
+	
+	; skip y loop if b is 0
+	ld a, b
+	cp a, 0
+	jr z, @skip_y REL
+
+@y_loop:
+		add hl, de 
+		dec b
+		jr nz, @y_loop REL
+@skip_y:
+
+	ld d, 0
+	ld e, c
+	add hl, de ; hl = SCRN location
+		
+	pop af 
+	ld [hl], a
+
+	ret
+	
+	; draws 16 tiles
+	; inputs:
+	;		hl: start tile
+	;		b: y position
+map_draw_row:
+	ret
+	
 	; draws a full page of the currently selected map
-	; waits for blank between each row
 	; inputs:
 	;		[map]
 map_full_draw:
+	ld bc, MAP_TILES
+	ld hl, tiles
+
+	push hl
+	ld bc, 0
+	call map_draw_tile
+	pop hl
+	
 	ret
 	
 	; nop map rotuine