use prerendered screen and remove sprite rotation

src/lib/drawing.asm

@@ -5,53 +5,6 @@ include ../consts/scene
 include ../consts/sprites
 include sprite_rotation
 
-; /* Draw the whole (fill the screen memory with the values of the sprites based on the map)
-
-; Inputs:
-
-; Outputs:
-
-; Locals:
-; 	r1: x map coord
-; 	r2: y map coord
-; 	r3: sprite rotation
-; 	r4: sprite id
-; 	r12: rotation (returned by `sprite and rotation`)
-; 	r13: sprite (returned by `get_sprite_id_and_rotation`)
-; */
-pub drawing.draw_whole_map:
-    push r1
-    push r2
-    push r3
-    push r4
-    push r12
-    push r13
-
-    mov r1, 0
-    mov r2, 0
-
-    draw_whole_map_loop:
-        call sprite_rotation.get_sprite_id_and_rotation
-        mov r3, r12
-        mov r4, r13
-        call drawing.draw_sprite_at_map_coord
-        add r1, r1, 1
-        cmp r1, map.width
-        jne draw_whole_map_loop
-        mov r1, 0
-        add r2, r2, 1
-        cmp r2, map.height
-        jne draw_whole_map_loop
-
-    pop r13
-    pop r12
-    pop r4
-    pop r3
-    pop r2
-    pop r1
-
-    ret
-
 ; /* Return the top-left pixel address of the tile at the given map coordinates
 
 ; Inputs:
@@ -77,7 +30,7 @@ get_tile_address:
 		cmp r3, sprites.height
 		jne get_tile_address_offset_per_row_loop
 
-	add r13, zr, ptr.screen
+	add r13, zr, screen
 
 	mov r3, 0
 	get_tile_address_margin_top_loop:
@@ -144,8 +97,7 @@ get_sprite_address:
 ; Inputs:
 ; 	r1: map x coord
 ; 	r2: map y coord
-; 	r3: sprite rotation
-; 	r4: sprite id
+; 	r3: sprite id
 
 ; Outputs:
 
@@ -158,22 +110,20 @@ pub drawing.draw_sprite_at_map_coord:
 	push r1
 	push r2
 	push r3
-	push r4
 	push r13
 
 	call get_tile_address
-	mov r1, r13
-	push r1
+	push r13
 	
-	mov r1, r4
+	mov r1, r3
 	call get_sprite_address
-	mov r2, r13
-	pop r1
 
+	mov r2, r13
+	pop r13
+	mov r1, r13
 	call draw_sprite
 
 	pop r13
-	pop r4
 	pop r3
 	pop r2
 	pop r1
@@ -184,18 +134,15 @@ pub drawing.draw_sprite_at_map_coord:
 ; Inputs:
 ; 	r1: screen address
 ; 	r2: sprite address
-; 	r3: rotation
 
 ; Outputs:
 
 ; Locals:
 ; 	r1: current screen pixel address
-; 	r4: x
-; 	r5: y
-; 	r6: current sprite pixel address
-; 	r7: color
-; 	r8: x increment
-; 	r9: y increment
+;		r2: current sprite pixel address
+; 	r3: x
+; 	r4: color
+;		r5: sprite last pixel address + 1
 ; */
 draw_sprite:
 	push r1
@@ -203,67 +150,25 @@ draw_sprite:
 	push r3
 	push r4
 	push r5
-	push r6
-	push r7
-	push r8
-	push r9
-
-	mov r6, r2
-
-	; rotation
-	draw_sprite_cmp_rotation_0:
-		cmp r3, sprites.rotation_0
-		jne draw_sprite_cmp_rotation_90
-		mov r8, 1
-		mov r9, 0
-		jmp draw_sprite_loop_init
-	draw_sprite_cmp_rotation_90:
-		cmp r3, sprites.rotation_90
-		jne draw_sprite_cmp_rotation_180
-		add r6, r6, sprites.size
-		sub r6, r6, sprites.width
-		sub r8, zr, sprites.width
-		mov r9, sprites.size
-		add r9, r9, 1
-		jmp draw_sprite_loop_init
-	draw_sprite_cmp_rotation_180:
-		cmp r3, sprites.rotation_180
-		jne draw_sprite_cmp_rotation_270
-		add r6, r6, sprites.size
-		sub r6, r6, 1
-		sub r8, zr, 1
-		mov r9, 0
-		jmp draw_sprite_loop_init
-	draw_sprite_cmp_rotation_270:
-		add r6, r6, sprites.width
-		sub r6, r6, 1
-		mov r8, sprites.width
-		sub r9, zr, sprites.size
-		sub r9, r9, 1
 	
-	draw_sprite_loop_init:
-	mov r4, 0
-	mov r5, 0
+	add r5, r2, sprites.size
+
+	mov r3, 0
 	draw_sprite_loop:
-		load_8 r7, [r6]
-		store_8 [r1], r7
-		add r4, r4, 1
+		load_8 r4, [r2]
+		store_8 [r1], r4
+
 		add r1, r1, 1
-		add r6, r6, r8
-		cmp r4, sprites.width
+		add r2, r2, 1
+		add r3, r3, 1
+		cmp r3, sprites.width
 		jne draw_sprite_loop
-		mov r4, 0
-		add r6, r6, r9
+		mov r3, 0
 		add r1, r1, screen.width
 		sub r1, r1, sprites.width
-		add r5, r5, 1
-		cmp r5, sprites.width
+		cmp r5, r2
 		jne draw_sprite_loop
 		
-	pop r9
-	pop r8
-	pop r7
-	pop r6
 	pop r5
 	pop r4
 	pop r3